feat: multiple Select and Bulk Pane Actions (#4169)

* initial implementation with break panes to new tab

* break pane group left/right

* group embed/eject panes

* stack pane group on resize

* close pane group

* style(fmt): rustfmt

* fix tests

* group drag and ungroup with the mouse

* fix mouse hover for multiple clients

* fix for multiple clients

* multiple select plugin initial

* use real data in plugin

* adjust functionality

* fix some ux issues

* reflect group mouse group selections in plugin

* group/ungroup panes in Zellij

* highlight frames when marked by the plugin

* refactor: render function in plugin

* some ui responsiveness

* some more responsiveness and adjust hover text

* break out functionality

* stack functionality

* break panes left/right and close multiple panes

* fix(tab): only relayout the relevant layout when non-focused pane is closed

* status bar UI

* embed and float panes

* work

* fix some ui/ux issues

* refactor: move stuff around

* some responsiveness and fix search result browsing bug

* change plugin pane title

* differentiate group from focused pane

* add keyboard shortcut

* add ui to compact bar

* make boundary colors appear properly without pane frames

* get plugins to also display their frame color

* make hover shortcuts appear on command panes

* fix: do not render search string component if it's empty

* BeforeClose Event and unhighlight panes on exit

* some UI/UX fixes

* some fixes to the catppuccin-latte theme

* remove ungroup shortcut

* make some ui components opaque

* fix more opaque elements

* fix some issues with stacking pane order

* keyboard shortcuts for grouping

* config to opt out of advanced mouse actions

* make selected + focused frame color distinct

* group marking mode

* refactor: multiple-select plugin

* adjust stacking group behavior

* adjust flashing periods

* render common modifier in group controls

* add to compact bar

* adjust key hint wording

* add key to presets and default config

* some cleanups

* some refactoring

* fix tests

* fix plugin system tests

* tests: group/ungroup/hover

* test: BeforeClose plugin event

* new plugin assets

* style(fmt): rustfmt

* remove warnings

* tests: give plugin more time to load

Cargo.lock

@@ -2231,6 +2231,14 @@ version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5ce46fe64a9d73be07dcbe690a38ce1b293be448fd8ce1e6c1b8062c9f72c6a"
 
+[[package]]
+name = "multiple-select"
+version = "0.1.0"
+dependencies = [
+ "fuzzy-matcher",
+ "zellij-tile",
+]
+
 [[package]]
 name = "names"
 version = "0.14.0"

Cargo.toml

@@ -47,6 +47,7 @@ members = [
     "default-plugins/configuration",
     "default-plugins/plugin-manager",
     "default-plugins/about",
+    "default-plugins/multiple-select",
     "zellij-client",
     "zellij-server",
     "zellij-utils",

default-plugins/compact-bar/src/line.rs

@@ -2,6 +2,7 @@ use ansi_term::ANSIStrings;
 use unicode_width::UnicodeWidthStr;
 
 use crate::{LinePart, ARROW_SEPARATOR};
+use zellij_tile::prelude::actions::Action;
 use zellij_tile::prelude::*;
 use zellij_tile_utils::style;
 
@@ -251,6 +252,8 @@ pub fn tab_line(
     mode: InputMode,
     active_swap_layout_name: &Option<String>,
     is_swap_layout_dirty: bool,
+    mode_info: &ModeInfo,
+    grouped_pane_count: Option<usize>,
 ) -> Vec<LinePart> {
     let mut tabs_after_active = all_tabs.split_off(active_tab_index);
     let mut tabs_before_active = all_tabs;
@@ -286,15 +289,21 @@ pub fn tab_line(
     if current_title_len < cols {
         let mut remaining_space = cols - current_title_len;
         let remaining_bg = palette.text_unselected.background;
-        if let Some(swap_layout_status) = swap_layout_status(
+        let right_side_component = match grouped_pane_count {
+            Some(grouped_pane_count) => {
+                render_group_controls(mode_info, grouped_pane_count, remaining_space)
+            },
+            None => swap_layout_status(
                 remaining_space,
                 active_swap_layout_name,
                 is_swap_layout_dirty,
                 mode,
                 &palette,
                 tab_separator(capabilities),
-        ) {
+            ),
-            remaining_space -= swap_layout_status.len;
+        };
+        if let Some(right_side_component) = right_side_component {
+            remaining_space -= right_side_component.len;
             let mut buffer = String::new();
             for _ in 0..remaining_space {
                 buffer.push_str(&style!(remaining_bg, remaining_bg).paint(" ").to_string());
@@ -304,7 +313,7 @@ pub fn tab_line(
                 len: remaining_space,
                 tab_index: None,
             });
-            prefix.push(swap_layout_status);
+            prefix.push(right_side_component);
         }
     }
 
@@ -373,3 +382,274 @@ fn swap_layout_status(
         None => None,
     }
 }
+
+fn render_group_controls(
+    help: &ModeInfo,
+    grouped_pane_count: usize,
+    max_len: usize,
+) -> Option<LinePart> {
+    let currently_marking_group = help.currently_marking_pane_group.unwrap_or(false);
+    let keymap = help.get_mode_keybinds();
+    let (common_modifiers, multiple_select_key, pane_group_toggle_key, group_mark_toggle_key) = {
+        let multiple_select_key = multiple_select_key(&keymap);
+        let pane_group_toggle_key = single_action_key(&keymap, &[Action::TogglePaneInGroup]);
+        let group_mark_toggle_key = single_action_key(&keymap, &[Action::ToggleGroupMarking]);
+        let common_modifiers = get_common_modifiers(
+            vec![
+                multiple_select_key.iter().next(),
+                pane_group_toggle_key.iter().next(),
+                group_mark_toggle_key.iter().next(),
+            ]
+            .into_iter()
+            .filter_map(|k| k)
+            .collect(),
+        );
+        let multiple_select_key: Vec<KeyWithModifier> = multiple_select_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        let pane_group_toggle_key: Vec<KeyWithModifier> = pane_group_toggle_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        let group_mark_toggle_key: Vec<KeyWithModifier> = group_mark_toggle_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        (
+            common_modifiers,
+            multiple_select_key,
+            pane_group_toggle_key,
+            group_mark_toggle_key,
+        )
+    };
+    let multiple_select_key = multiple_select_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let pane_group_toggle_key = pane_group_toggle_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let group_mark_toggle_key = group_mark_toggle_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let background = help.style.colors.text_unselected.background;
+    let foreground = help.style.colors.text_unselected.base;
+    let superkey_prefix_style = style!(foreground, background).bold();
+    let common_modifier_text = if common_modifiers.is_empty() {
+        "".to_owned()
+    } else {
+        format!(
+            "{} + ",
+            common_modifiers
+                .iter()
+                .map(|c| c.to_string())
+                .collect::<Vec<_>>()
+                .join("-")
+        )
+    };
+
+    // full
+    let full_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED PANES", grouped_pane_count)
+    } else {
+        format!("{} SELECTED PANES |", grouped_pane_count)
+    };
+    let full_group_actions_text = format!("<{}> Group Actions", &multiple_select_key);
+    let full_toggle_group_text = format!("<{}> Toggle Group", &pane_group_toggle_key);
+    let full_group_mark_toggle_text = format!("<{}> Follow Focus", &group_mark_toggle_key);
+    let ribbon_paddings_len = 12;
+    let full_controls_line_len = full_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + full_group_actions_text.chars().count()
+        + full_toggle_group_text.chars().count()
+        + full_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    // medium
+    let medium_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED", grouped_pane_count)
+    } else {
+        format!("{} SELECTED |", grouped_pane_count)
+    };
+    let medium_group_actions_text = format!("<{}> Actions", &multiple_select_key);
+    let medium_toggle_group_text = format!("<{}> Toggle", &pane_group_toggle_key);
+    let medium_group_mark_toggle_text = format!("<{}> Follow", &group_mark_toggle_key);
+    let ribbon_paddings_len = 12;
+    let medium_controls_line_len = medium_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + medium_group_actions_text.chars().count()
+        + medium_toggle_group_text.chars().count()
+        + medium_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    // short
+    let short_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED", grouped_pane_count)
+    } else {
+        format!("{} SELECTED |", grouped_pane_count)
+    };
+    let short_group_actions_text = format!("<{}>", &multiple_select_key);
+    let short_toggle_group_text = format!("<{}>", &pane_group_toggle_key);
+    let short_group_mark_toggle_text = format!("<{}>", &group_mark_toggle_key);
+    let color_emphasis_range_end = if common_modifier_text.is_empty() {
+        0
+    } else {
+        2
+    };
+    let ribbon_paddings_len = 12;
+    let short_controls_line_len = short_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + short_group_actions_text.chars().count()
+        + short_toggle_group_text.chars().count()
+        + short_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    let (
+        selected_panes_text,
+        group_actions_text,
+        toggle_group_text,
+        group_mark_toggle_text,
+        controls_line_len,
+    ) = if max_len >= full_controls_line_len {
+        (
+            full_selected_panes_text,
+            full_group_actions_text,
+            full_toggle_group_text,
+            full_group_mark_toggle_text,
+            full_controls_line_len,
+        )
+    } else if max_len >= medium_controls_line_len {
+        (
+            medium_selected_panes_text,
+            medium_group_actions_text,
+            medium_toggle_group_text,
+            medium_group_mark_toggle_text,
+            medium_controls_line_len,
+        )
+    } else if max_len >= short_controls_line_len {
+        (
+            short_selected_panes_text,
+            short_group_actions_text,
+            short_toggle_group_text,
+            short_group_mark_toggle_text,
+            short_controls_line_len,
+        )
+    } else {
+        return None;
+    };
+    let selected_panes = serialize_text(
+        &Text::new(&selected_panes_text)
+            .color_range(
+                3,
+                ..selected_panes_text
+                    .chars()
+                    .count()
+                    .saturating_sub(color_emphasis_range_end),
+            )
+            .opaque(),
+    );
+    let group_actions_ribbon = serialize_ribbon(
+        &Text::new(&group_actions_text).color_range(0, 1..=multiple_select_key.chars().count()),
+    );
+    let toggle_group_ribbon = serialize_ribbon(
+        &Text::new(&toggle_group_text).color_range(0, 1..=pane_group_toggle_key.chars().count()),
+    );
+    let mut group_mark_toggle_ribbon = Text::new(&group_mark_toggle_text)
+        .color_range(0, 1..=group_mark_toggle_key.chars().count());
+    if currently_marking_group {
+        group_mark_toggle_ribbon = group_mark_toggle_ribbon.selected();
+    }
+    let group_mark_toggle_ribbon = serialize_ribbon(&group_mark_toggle_ribbon);
+    let controls_line = if common_modifiers.is_empty() {
+        format!(
+            "{} {}{}{}",
+            selected_panes, group_actions_ribbon, toggle_group_ribbon, group_mark_toggle_ribbon
+        )
+    } else {
+        let common_modifier =
+            serialize_text(&Text::new(&common_modifier_text).color_range(0, ..).opaque());
+        format!(
+            "{} {}{}{}{}",
+            selected_panes,
+            common_modifier,
+            group_actions_ribbon,
+            toggle_group_ribbon,
+            group_mark_toggle_ribbon
+        )
+    };
+    let remaining_space = max_len.saturating_sub(controls_line_len);
+    let mut padding = String::new();
+    let mut padding_len = 0;
+    for _ in 0..remaining_space {
+        padding.push_str(&ANSIStrings(&[superkey_prefix_style.paint(" ")]).to_string());
+        padding_len += 1;
+    }
+    Some(LinePart {
+        part: format!("{}{}", padding, controls_line),
+        len: controls_line_len + padding_len,
+        tab_index: None,
+    })
+}
+
+fn multiple_select_key(keymap: &[(KeyWithModifier, Vec<Action>)]) -> Vec<KeyWithModifier> {
+    let mut matching = keymap.iter().find_map(|(key, acvec)| {
+        let has_match = acvec
+            .iter()
+            .find(|a| a.launches_plugin("zellij:multiple-select")) // TODO: make this an alias
+            .is_some();
+        if has_match {
+            Some(key.clone())
+        } else {
+            None
+        }
+    });
+    if let Some(matching) = matching.take() {
+        vec![matching]
+    } else {
+        vec![]
+    }
+}
+
+fn single_action_key(
+    keymap: &[(KeyWithModifier, Vec<Action>)],
+    action: &[Action],
+) -> Vec<KeyWithModifier> {
+    let mut matching = keymap.iter().find_map(|(key, acvec)| {
+        if acvec.iter().next() == action.iter().next() {
+            Some(key.clone())
+        } else {
+            None
+        }
+    });
+    if let Some(matching) = matching.take() {
+        vec![matching]
+    } else {
+        vec![]
+    }
+}
+
+fn get_common_modifiers(mut keyvec: Vec<&KeyWithModifier>) -> Vec<KeyModifier> {
+    if keyvec.is_empty() {
+        return vec![];
+    }
+    let mut common_modifiers = keyvec.pop().unwrap().key_modifiers.clone();
+    for key in keyvec {
+        common_modifiers = common_modifiers
+            .intersection(&key.key_modifiers)
+            .cloned()
+            .collect();
+    }
+    common_modifiers.into_iter().collect()
+}

default-plugins/compact-bar/src/main.rs

@@ -26,6 +26,8 @@ struct State {
     tab_line: Vec<LinePart>,
     text_copy_destination: Option<CopyDestination>,
     display_system_clipboard_failure: bool,
+    own_client_id: Option<ClientId>,
+    grouped_panes_count: Option<usize>,
 }
 
 static ARROW_SEPARATOR: &str = "";
@@ -42,7 +44,9 @@ impl ZellijPlugin for State {
             EventType::CopyToClipboard,
             EventType::InputReceived,
             EventType::SystemClipboardFailure,
+            EventType::PaneUpdate,
         ]);
+        self.own_client_id = Some(get_plugin_ids().client_id);
     }
 
     fn update(&mut self, event: Event) -> bool {
@@ -108,6 +112,28 @@ impl ZellijPlugin for State {
                 self.text_copy_destination = None;
                 self.display_system_clipboard_failure = false;
             },
+            Event::PaneUpdate(pane_manifest) => {
+                if let Some(own_client_id) = self.own_client_id {
+                    let mut grouped_panes_count = 0;
+                    for (_tab_index, pane_infos) in pane_manifest.panes {
+                        for pane_info in pane_infos {
+                            let is_in_pane_group =
+                                pane_info.index_in_pane_group.get(&own_client_id).is_some();
+                            if is_in_pane_group {
+                                grouped_panes_count += 1;
+                            }
+                        }
+                    }
+                    if Some(grouped_panes_count) != self.grouped_panes_count {
+                        if grouped_panes_count == 0 {
+                            self.grouped_panes_count = None;
+                        } else {
+                            self.grouped_panes_count = Some(grouped_panes_count);
+                        }
+                        should_render = true;
+                    }
+                }
+            },
             _ => {
                 eprintln!("Got unrecognized event: {:?}", event);
             },
@@ -181,6 +207,8 @@ impl ZellijPlugin for State {
                 self.mode_info.mode,
                 &active_swap_layout_name,
                 is_swap_layout_dirty,
+                &self.mode_info,
+                self.grouped_panes_count,
             );
             let output = self
                 .tab_line

default-plugins/configuration/src/presets.rs

@@ -168,6 +168,14 @@ keybinds clear-defaults=true {{
         bind "{secondary_modifier} -" {{ Resize "Decrease"; }}
         bind "{secondary_modifier} [" {{ PreviousSwapLayout; }}
         bind "{secondary_modifier} ]" {{ NextSwapLayout; }}
+        bind "{secondary_modifier} m" {{ 
+            LaunchOrFocusPlugin "zellij:multiple-select" {{
+                floating true
+                move_to_focused_tab true
+            }}
+        }}
+        bind "{secondary_modifier} p" {{ TogglePaneInGroup; }}
+        bind "{secondary_modifier} Shift p" {{ ToggleGroupMarking; }}
     }}
     shared_except "locked" "renametab" "renamepane" {{
         bind "Enter" {{ SwitchToMode "Locked"; }}
@@ -392,6 +400,14 @@ keybinds clear-defaults=true {{
         bind "{secondary_modifier} -" {{ Resize "Decrease"; }}
         bind "{secondary_modifier} [" {{ PreviousSwapLayout; }}
         bind "{secondary_modifier} ]" {{ NextSwapLayout; }}
+        bind "{secondary_modifier} m" {{
+            LaunchOrFocusPlugin "zellij:multiple-select" {{
+                floating true
+                move_to_focused_tab true
+            }}
+        }}
+        bind "{secondary_modifier} p" {{ TogglePaneInGroup; }}
+        bind "{secondary_modifier} Shift p" {{ ToggleGroupMarking; }}
     }}
     shared_except "normal" "locked" {{
         bind "Enter" "Esc" {{ SwitchToMode "Normal"; }}
@@ -595,6 +611,14 @@ keybinds clear-defaults=true {{
         bind "{secondary_modifier} -" {{ Resize "Decrease"; }}
         bind "{secondary_modifier} [" {{ PreviousSwapLayout; }}
         bind "{secondary_modifier} ]" {{ NextSwapLayout; }}
+        bind "{secondary_modifier} m" {{
+            LaunchOrFocusPlugin "zellij:multiple-select" {{
+                floating true
+                move_to_focused_tab true
+            }}
+        }}
+        bind "{secondary_modifier} p" {{ TogglePaneInGroup; }}
+        bind "{secondary_modifier} Shift p" {{ ToggleGroupMarking; }}
     }}
     shared_except "normal" "locked" {{
         bind "Enter" "Esc" {{ SwitchToMode "Normal"; }}
@@ -1158,6 +1182,14 @@ keybinds clear-defaults=true {{
         bind "{secondary_modifier} -" {{ Resize "Decrease"; }}
         bind "{secondary_modifier} [" {{ PreviousSwapLayout; }}
         bind "{secondary_modifier} ]" {{ NextSwapLayout; }}
+        bind "{secondary_modifier} m" {{
+            LaunchOrFocusPlugin "zellij:multiple-select" {{
+                floating true
+                move_to_focused_tab true
+            }}
+        }}
+        bind "{secondary_modifier} p" {{ TogglePaneInGroup; }}
+        bind "{secondary_modifier} Shift p" {{ ToggleGroupMarking; }}
     }}
     shared_except "normal" "locked" {{
         bind "Enter" "Esc" {{ SwitchToMode "Normal"; }}

default-plugins/fixture-plugin-for-tests/src/main.rs

@@ -67,6 +67,7 @@ impl ZellijPlugin for State {
             EventType::FileSystemCreate,
             EventType::FileSystemUpdate,
             EventType::FileSystemDelete,
+            EventType::BeforeClose,
         ]);
         watch_filesystem();
     }
@@ -535,6 +536,10 @@ impl ZellijPlugin for State {
                     self.received_payload = Some(payload.clone());
                 }
             },
+            Event::BeforeClose => {
+                // this is just to assert something to make sure this event was triggered
+                highlight_and_unhighlight_panes(vec![PaneId::Terminal(1)], vec![PaneId::Plugin(1)]);
+            },
             Event::SystemClipboardFailure => {
                 // this is just to trigger the worker message
                 post_message_to(PluginMessage {

default-plugins/multiple-select/.cargo/config.toml

@@ -0,0 +1,2 @@
+[build]
+target = "wasm32-wasip1"

default-plugins/multiple-select/.gitignore

@@ -0,0 +1 @@
+/target

default-plugins/multiple-select/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "multiple-select"
+version = "0.1.0"
+authors = ["Aram Drevekenin <aram@poor.dev>"]
+edition = "2021"
+license = "MIT"
+
+[dependencies]
+zellij-tile = { path = "../../zellij-tile" }
+fuzzy-matcher = "0.3.7"

default-plugins/multiple-select/LICENSE.md

@@ -0,0 +1 @@
+../../LICENSE.md

default-plugins/multiple-select/src/main.rs

@@ -0,0 +1,212 @@
+pub mod state;
+pub mod ui;
+
+use state::{MarkedIndex, VisibilityAndFocus};
+use std::collections::BTreeMap;
+use ui::PaneItem;
+use zellij_tile::prelude::*;
+
+#[derive(Debug, Default)]
+pub struct App {
+    own_plugin_id: Option<u32>,
+    own_client_id: Option<ClientId>,
+    own_tab_index: Option<usize>,
+    total_tabs_in_session: Option<usize>,
+    search_string: String,
+    previous_search_string: String, // used eg. for the new tab title when breaking panes
+    left_side_panes: Vec<PaneItem>,
+    right_side_panes: Vec<PaneItem>,
+    search_results: Option<Vec<PaneItem>>,
+    visibility_and_focus: VisibilityAndFocus,
+    marked_index: Option<MarkedIndex>,
+}
+
+register_plugin!(App);
+
+impl ZellijPlugin for App {
+    fn load(&mut self, _configuration: BTreeMap<String, String>) {
+        subscribe(&[
+            EventType::Key,
+            EventType::Mouse,
+            EventType::ModeUpdate,
+            EventType::RunCommandResult,
+            EventType::TabUpdate,
+            EventType::PaneUpdate,
+            EventType::FailedToWriteConfigToDisk,
+            EventType::ConfigWasWrittenToDisk,
+            EventType::BeforeClose,
+        ]);
+        let plugin_ids = get_plugin_ids();
+        self.own_plugin_id = Some(plugin_ids.plugin_id);
+        self.own_client_id = Some(plugin_ids.client_id);
+        rename_plugin_pane(plugin_ids.plugin_id, "Multiple Select");
+    }
+    fn update(&mut self, event: Event) -> bool {
+        let mut should_render = false;
+        match event {
+            Event::PaneUpdate(pane_manifest) => {
+                self.react_to_zellij_state_update(pane_manifest);
+                should_render = true;
+            },
+            Event::Key(key) => {
+                match key.bare_key {
+                    BareKey::Tab if key.has_no_modifiers() => {
+                        self.visibility_and_focus.toggle_focus();
+                        self.marked_index = None;
+                        self.update_highlighted_panes();
+                        should_render = true;
+                    },
+                    BareKey::Char(character)
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.left_side_is_focused()
+                            && self.marked_index.is_none() =>
+                    {
+                        self.search_string.push(character);
+                        self.update_search_results();
+                        should_render = true;
+                    },
+                    BareKey::Backspace
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.left_side_is_focused()
+                            && self.marked_index.is_none() =>
+                    {
+                        self.search_string.pop();
+                        self.update_search_results();
+                        should_render = true;
+                    },
+                    BareKey::Enter if key.has_no_modifiers() => {
+                        if self.visibility_and_focus.left_side_is_focused() {
+                            if let Some(marked_index) = self.marked_index.take() {
+                                let keep_left_side_focused = false;
+                                self.group_panes(marked_index, keep_left_side_focused);
+                            } else {
+                                match self.search_results.take() {
+                                    Some(search_results) => {
+                                        self.group_search_results(search_results)
+                                    },
+                                    None => self.group_all_panes(),
+                                }
+                                self.handle_left_side_emptied();
+                            }
+                        }
+                        should_render = true;
+                    },
+                    BareKey::Right
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.left_side_is_focused() =>
+                    {
+                        if let Some(marked_index) = self.marked_index.take() {
+                            let keep_left_side_focused = true;
+                            self.group_panes(marked_index, keep_left_side_focused);
+                            should_render = true;
+                        }
+                    },
+                    BareKey::Left
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        if self.visibility_and_focus.right_side_is_focused() {
+                            if let Some(marked_index) = self.marked_index.take() {
+                                self.ungroup_panes(marked_index);
+                                should_render = true;
+                            }
+                        }
+                    },
+                    BareKey::Char('c') if key.has_modifiers(&[KeyModifier::Ctrl]) => {
+                        if self.visibility_and_focus.right_side_is_focused() {
+                            // this means we're in the selection panes part and we want to clear
+                            // them
+                            self.ungroup_all_panes();
+                        } else if self.visibility_and_focus.left_side_is_focused() {
+                            if self.marked_index.is_some() {
+                                self.marked_index = None;
+                                self.update_highlighted_panes();
+                            } else {
+                                self.ungroup_all_panes_and_close_self();
+                            }
+                        }
+                        should_render = true;
+                    },
+                    BareKey::Down if key.has_no_modifiers() => {
+                        self.move_marked_index_down();
+                        should_render = true;
+                    },
+                    BareKey::Up if key.has_no_modifiers() => {
+                        self.move_marked_index_up();
+                        should_render = true;
+                    },
+                    BareKey::Char(' ') if key.has_no_modifiers() && self.marked_index.is_some() => {
+                        self.mark_entry();
+                        should_render = true;
+                    },
+                    BareKey::Char('b')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.break_grouped_panes_to_new_tab();
+                    },
+                    BareKey::Char('s')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.stack_grouped_panes();
+                    },
+                    BareKey::Char('f')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.float_grouped_panes();
+                    },
+                    BareKey::Char('e')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.embed_grouped_panes();
+                    },
+                    BareKey::Char('r')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.break_grouped_panes_right();
+                    },
+                    BareKey::Char('l')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.break_grouped_panes_left();
+                    },
+                    BareKey::Char('c')
+                        if key.has_no_modifiers()
+                            && self.visibility_and_focus.right_side_is_focused() =>
+                    {
+                        self.close_grouped_panes();
+                    },
+                    _ => {},
+                }
+            },
+            Event::BeforeClose => {
+                self.unhighlight_all_panes();
+            },
+            _ => {},
+        }
+        should_render
+    }
+    fn render(&mut self, rows: usize, cols: usize) {
+        self.render_close_shortcut(cols);
+        self.render_tab_shortcut(cols, rows);
+        match self.visibility_and_focus {
+            VisibilityAndFocus::OnlyLeftSideVisible => self.render_left_side(rows, cols, true),
+            VisibilityAndFocus::OnlyRightSideVisible => self.render_right_side(rows, cols, true),
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused => {
+                self.render_left_side(rows, cols, true);
+                self.render_right_side(rows, cols, false);
+            },
+            VisibilityAndFocus::BothSidesVisibleRightSideFocused => {
+                self.render_left_side(rows, cols, false);
+                self.render_right_side(rows, cols, true);
+            },
+        }
+        self.render_focus_boundary(rows, cols);
+        self.render_help_line(rows, cols);
+    }
+}

default-plugins/multiple-select/src/state.rs

@@ -0,0 +1,634 @@
+use crate::{ui::PaneItem, App};
+use std::collections::{BTreeMap, BTreeSet, HashSet};
+
+use fuzzy_matcher::skim::SkimMatcherV2;
+use fuzzy_matcher::FuzzyMatcher;
+
+use zellij_tile::prelude::*;
+
+#[derive(Debug, Default)]
+pub struct MarkedIndex {
+    pub main_index: usize,
+    pub additional_indices: HashSet<usize>,
+}
+
+impl MarkedIndex {
+    pub fn new(main_index: usize) -> Self {
+        MarkedIndex {
+            main_index,
+            additional_indices: HashSet::new(),
+        }
+    }
+}
+
+impl MarkedIndex {
+    pub fn toggle_additional_mark(&mut self) {
+        if self.additional_indices.contains(&self.main_index) {
+            self.additional_indices.retain(|a| a != &self.main_index);
+        } else {
+            self.additional_indices.insert(self.main_index);
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum VisibilityAndFocus {
+    OnlyLeftSideVisible,
+    OnlyRightSideVisible,
+    BothSidesVisibleLeftSideFocused,
+    BothSidesVisibleRightSideFocused,
+}
+
+impl Default for VisibilityAndFocus {
+    fn default() -> Self {
+        VisibilityAndFocus::OnlyLeftSideVisible
+    }
+}
+
+impl VisibilityAndFocus {
+    pub fn only_left_side_is_focused(&self) -> bool {
+        match self {
+            VisibilityAndFocus::OnlyLeftSideVisible => true,
+            _ => false,
+        }
+    }
+    pub fn left_side_is_focused(&self) -> bool {
+        match self {
+            VisibilityAndFocus::OnlyLeftSideVisible
+            | VisibilityAndFocus::BothSidesVisibleLeftSideFocused => true,
+            _ => false,
+        }
+    }
+    pub fn right_side_is_focused(&self) -> bool {
+        match self {
+            VisibilityAndFocus::OnlyRightSideVisible
+            | VisibilityAndFocus::BothSidesVisibleRightSideFocused => true,
+            _ => false,
+        }
+    }
+    pub fn hide_left_side(&mut self) {
+        *self = VisibilityAndFocus::OnlyRightSideVisible
+    }
+    pub fn hide_right_side(&mut self) {
+        *self = VisibilityAndFocus::OnlyLeftSideVisible
+    }
+    pub fn focus_right_side(&mut self) {
+        *self = VisibilityAndFocus::BothSidesVisibleRightSideFocused
+    }
+    pub fn toggle_focus(&mut self) {
+        match self {
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused => {
+                *self = VisibilityAndFocus::BothSidesVisibleRightSideFocused
+            },
+            VisibilityAndFocus::BothSidesVisibleRightSideFocused => {
+                *self = VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            },
+            VisibilityAndFocus::OnlyLeftSideVisible => {
+                *self = VisibilityAndFocus::BothSidesVisibleRightSideFocused
+            },
+            VisibilityAndFocus::OnlyRightSideVisible => {
+                *self = VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            },
+        }
+    }
+    pub fn show_both_sides(&mut self) {
+        match self {
+            VisibilityAndFocus::OnlyLeftSideVisible => {
+                *self = VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            },
+            VisibilityAndFocus::OnlyRightSideVisible => {
+                *self = VisibilityAndFocus::BothSidesVisibleRightSideFocused
+            },
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            | VisibilityAndFocus::BothSidesVisibleRightSideFocused => {
+                // no-op
+            },
+        }
+    }
+}
+
+impl App {
+    pub fn react_to_zellij_state_update(&mut self, pane_manifest: PaneManifest) {
+        let is_first_update = self.right_side_panes.is_empty() && self.left_side_panes.is_empty();
+        let panes_on_the_left_before = self.left_side_panes.len();
+        let panes_on_the_right_before = self.right_side_panes.len();
+        self.update_tab_info(&pane_manifest);
+        self.update_panes(pane_manifest);
+        if is_first_update && !self.right_side_panes.is_empty() {
+            // in this case, the plugin was started with an existing group
+            // most likely, the user wants to perform operations just on this group, so we
+            // only show the group, giving the option to add more panes
+            self.visibility_and_focus.hide_left_side();
+        }
+        let pane_count_changed = (panes_on_the_left_before != self.left_side_panes.len())
+            || (panes_on_the_right_before != self.right_side_panes.len());
+        if !is_first_update && pane_count_changed {
+            let has_panes_on_the_right = !self.right_side_panes.is_empty();
+            let has_panes_on_the_left = !self.left_side_panes.is_empty();
+            if has_panes_on_the_right && has_panes_on_the_left {
+                self.visibility_and_focus.show_both_sides();
+            } else if has_panes_on_the_right {
+                self.visibility_and_focus.hide_left_side();
+            } else if has_panes_on_the_left {
+                self.visibility_and_focus.hide_right_side();
+            }
+        }
+    }
+    pub fn update_panes(&mut self, pane_manifest: PaneManifest) {
+        let mut all_panes = BTreeMap::new();
+        for (_tab_index, pane_infos) in pane_manifest.panes {
+            for pane_info in pane_infos {
+                if pane_info.is_selectable {
+                    if pane_info.is_plugin {
+                        all_panes.insert(PaneId::Plugin(pane_info.id), pane_info);
+                    } else {
+                        all_panes.insert(PaneId::Terminal(pane_info.id), pane_info);
+                    }
+                }
+            }
+        }
+        self.left_side_panes
+            .retain(|p| all_panes.contains_key(&p.id));
+        self.right_side_panes
+            .retain(|p| all_panes.contains_key(&p.id));
+        let mut new_selected_panes: BTreeMap<usize, PaneItem> = BTreeMap::new(); // usize -> index_in_pane_group
+        for (pane_id, pane) in all_panes.into_iter() {
+            let is_known = self
+                .left_side_panes
+                .iter()
+                .find(|p| p.id == pane_id)
+                .is_some()
+                || self
+                    .right_side_panes
+                    .iter()
+                    .find(|p| p.id == pane_id)
+                    .is_some();
+            let index_in_pane_group = self
+                .own_client_id
+                .and_then(|own_client_id| pane.index_in_pane_group.get(&own_client_id));
+            let is_grouped_for_own_client_id = index_in_pane_group.is_some();
+            if !is_known {
+                if is_grouped_for_own_client_id {
+                    if let Some(index_in_pane_group) = index_in_pane_group {
+                        // we do this rather than adding them directly to right_side_panes so that
+                        // we can make sure they're in the same order as the group is so that
+                        // things like stacking order will do the right thing
+                        new_selected_panes.insert(
+                            *index_in_pane_group,
+                            PaneItem {
+                                text: pane.title,
+                                id: pane_id,
+                                color_indices: vec![],
+                            },
+                        );
+                    }
+                } else {
+                    self.left_side_panes.push(PaneItem {
+                        text: pane.title,
+                        id: pane_id,
+                        color_indices: vec![],
+                    });
+                }
+            } else {
+                if is_grouped_for_own_client_id {
+                    if let Some(position) =
+                        self.left_side_panes.iter().position(|p| p.id == pane_id)
+                    {
+                        // pane was added to a pane group outside the plugin (eg. with mouse selection)
+                        let mut pane = self.left_side_panes.remove(position);
+                        pane.clear();
+                        self.right_side_panes.push(pane);
+                    }
+                } else {
+                    if let Some(position) =
+                        self.right_side_panes.iter().position(|p| p.id == pane_id)
+                    {
+                        // pane was removed from a pane group outside the plugin (eg. with mouse selection)
+                        let mut pane = self.right_side_panes.remove(position);
+                        pane.clear();
+                        self.left_side_panes.push(pane);
+                    }
+                }
+            }
+        }
+        for (_index_in_pane_group, pane_item) in new_selected_panes.into_iter() {
+            self.right_side_panes.push(pane_item);
+        }
+    }
+    pub fn update_tab_info(&mut self, pane_manifest: &PaneManifest) {
+        for (tab_index, pane_infos) in &pane_manifest.panes {
+            for pane_info in pane_infos {
+                if pane_info.is_plugin && Some(pane_info.id) == self.own_plugin_id {
+                    self.own_tab_index = Some(*tab_index);
+                }
+            }
+        }
+        self.total_tabs_in_session = Some(pane_manifest.panes.keys().count());
+    }
+    pub fn update_search_results(&mut self) {
+        let mut matches = vec![];
+        let matcher = SkimMatcherV2::default().use_cache(true);
+        for pane_item in &self.left_side_panes {
+            if let Some((score, indices)) =
+                matcher.fuzzy_indices(&pane_item.text, &self.search_string)
+            {
+                let mut pane_item = pane_item.clone();
+                pane_item.color_indices = indices;
+                matches.push((score, pane_item));
+            }
+        }
+        matches.sort_by(|(a_score, _a), (b_score, _b)| b_score.cmp(&a_score));
+        if self.search_string.is_empty() {
+            self.search_results = None;
+        } else {
+            self.search_results = Some(
+                matches
+                    .into_iter()
+                    .map(|(_s, pane_item)| pane_item)
+                    .collect(),
+            );
+        }
+    }
+    pub fn group_panes_in_zellij(&mut self, pane_ids: Vec<PaneId>) {
+        group_and_ungroup_panes(pane_ids, vec![]);
+    }
+    pub fn ungroup_panes_in_zellij(&mut self, pane_ids: Vec<PaneId>) {
+        group_and_ungroup_panes(vec![], pane_ids);
+    }
+    pub fn update_highlighted_panes(&self) {
+        let mut pane_ids_to_highlight = vec![];
+        let mut pane_ids_to_unhighlight = vec![];
+        if let Some(marked_index) = &self.marked_index {
+            if self.visibility_and_focus.left_side_is_focused() {
+                if let Some(main_index_pane_id) = self
+                    .search_results
+                    .as_ref()
+                    .and_then(|s| s.get(marked_index.main_index))
+                    .or_else(|| self.left_side_panes.get(marked_index.main_index))
+                    .map(|p| p.id)
+                {
+                    pane_ids_to_highlight.push(main_index_pane_id);
+                }
+                for index in &marked_index.additional_indices {
+                    if let Some(pane_id) = self
+                        .search_results
+                        .as_ref()
+                        .and_then(|s| s.get(*index))
+                        .or_else(|| self.left_side_panes.get(*index))
+                        .map(|p| p.id)
+                    {
+                        pane_ids_to_highlight.push(pane_id);
+                    }
+                }
+            } else {
+                if let Some(main_index_pane_id) = self
+                    .right_side_panes
+                    .get(marked_index.main_index)
+                    .map(|p| p.id)
+                {
+                    pane_ids_to_highlight.push(main_index_pane_id);
+                }
+                for index in &marked_index.additional_indices {
+                    if let Some(pane_id) = self.right_side_panes.get(*index).map(|p| p.id) {
+                        pane_ids_to_highlight.push(pane_id);
+                    }
+                }
+            }
+        }
+        for pane in &self.left_side_panes {
+            if !pane_ids_to_highlight.contains(&pane.id) {
+                pane_ids_to_unhighlight.push(pane.id);
+            }
+        }
+        for pane in &self.right_side_panes {
+            if !pane_ids_to_highlight.contains(&pane.id) {
+                pane_ids_to_unhighlight.push(pane.id);
+            }
+        }
+        highlight_and_unhighlight_panes(pane_ids_to_highlight, pane_ids_to_unhighlight);
+    }
+    pub fn unhighlight_all_panes(&mut self) {
+        let mut pane_ids_to_unhighlight = HashSet::new();
+        for pane_item in &self.left_side_panes {
+            pane_ids_to_unhighlight.insert(pane_item.id);
+        }
+        for pane_item in &self.right_side_panes {
+            pane_ids_to_unhighlight.insert(pane_item.id);
+        }
+        highlight_and_unhighlight_panes(vec![], pane_ids_to_unhighlight.into_iter().collect());
+    }
+    pub fn ungroup_all_panes(&mut self) {
+        let mut unselected_panes = vec![];
+        for pane_item in self.right_side_panes.iter_mut() {
+            pane_item.clear();
+            unselected_panes.push(pane_item.id);
+        }
+        self.left_side_panes.append(&mut self.right_side_panes);
+        self.ungroup_panes_in_zellij(unselected_panes);
+        self.visibility_and_focus.hide_right_side();
+        self.marked_index = None;
+    }
+    pub fn ungroup_all_panes_and_close_self(&mut self) {
+        let mut pane_ids_to_ungroup = HashSet::new();
+        for pane_item in &self.left_side_panes {
+            pane_ids_to_ungroup.insert(pane_item.id);
+        }
+        for pane_item in &self.right_side_panes {
+            pane_ids_to_ungroup.insert(pane_item.id);
+        }
+        group_and_ungroup_panes(vec![], pane_ids_to_ungroup.into_iter().collect());
+        close_self();
+    }
+    pub fn group_panes(&mut self, mut marked_index: MarkedIndex, keep_left_side_focused: bool) {
+        let mut all_selected_indices: BTreeSet<usize> =
+            marked_index.additional_indices.drain().collect();
+        all_selected_indices.insert(marked_index.main_index);
+
+        // reverse so that the indices will remain consistent while
+        // removing
+        let mut selected_panes = vec![];
+        for index in all_selected_indices.iter().rev() {
+            let index = self
+                .search_results
+                .as_mut()
+                .and_then(|search_results| {
+                    if search_results.len() > *index {
+                        Some(search_results.remove(*index))
+                    } else {
+                        None
+                    }
+                })
+                .and_then(|selected_search_result| {
+                    self.left_side_panes
+                        .iter()
+                        .position(|p| p.id == selected_search_result.id)
+                })
+                .unwrap_or(*index);
+            if self.left_side_panes.len() > index {
+                let selected_pane = self.left_side_panes.remove(index);
+                selected_panes.push(selected_pane);
+            }
+        }
+        let pane_ids_to_make_selected: Vec<PaneId> = selected_panes.iter().map(|p| p.id).collect();
+        self.right_side_panes
+            .append(&mut selected_panes.into_iter().rev().collect());
+
+        let displayed_list_len = match self.search_results.as_ref() {
+            Some(search_results) => search_results.len(),
+            None => self.left_side_panes.len(),
+        };
+
+        if displayed_list_len == 0 {
+            self.handle_left_side_emptied();
+        } else if keep_left_side_focused {
+            if marked_index.main_index > displayed_list_len.saturating_sub(1) {
+                self.marked_index = Some(MarkedIndex::new(displayed_list_len.saturating_sub(1)));
+            } else {
+                self.marked_index = Some(marked_index);
+            }
+            self.visibility_and_focus.show_both_sides();
+        } else {
+            self.visibility_and_focus.focus_right_side();
+        }
+
+        self.group_panes_in_zellij(pane_ids_to_make_selected);
+        self.update_highlighted_panes();
+    }
+    pub fn ungroup_panes(&mut self, mut marked_index: MarkedIndex) {
+        let mut all_selected_indices: BTreeSet<usize> =
+            marked_index.additional_indices.drain().collect();
+        all_selected_indices.insert(marked_index.main_index);
+
+        // reverse so that the indices will remain consistent while
+        // removing
+        let mut selected_panes = vec![];
+        for index in all_selected_indices.iter().rev() {
+            if self.right_side_panes.len() > *index {
+                let mut selected_pane = self.right_side_panes.remove(*index);
+                selected_pane.clear();
+                selected_panes.push(selected_pane);
+            }
+        }
+        self.ungroup_panes_in_zellij(selected_panes.iter().map(|p| p.id).collect());
+        self.left_side_panes
+            .append(&mut selected_panes.into_iter().rev().collect());
+
+        if self.right_side_panes.is_empty() {
+            self.marked_index = None;
+            self.visibility_and_focus.hide_right_side();
+        } else if marked_index.main_index > self.right_side_panes.len().saturating_sub(1) {
+            self.marked_index = Some(MarkedIndex::new(
+                self.right_side_panes.len().saturating_sub(1),
+            ));
+            self.visibility_and_focus.show_both_sides();
+        } else {
+            self.marked_index = Some(marked_index);
+            self.visibility_and_focus.show_both_sides();
+        }
+        self.update_highlighted_panes();
+    }
+    pub fn group_search_results(&mut self, search_results: Vec<PaneItem>) {
+        let mut pane_ids_to_make_selected = vec![];
+        for search_result in search_results {
+            let pane_id = search_result.id;
+            pane_ids_to_make_selected.push(pane_id);
+            self.left_side_panes.retain(|p| p.id != pane_id);
+            self.right_side_panes.push(search_result);
+        }
+        self.group_panes_in_zellij(pane_ids_to_make_selected);
+    }
+    pub fn group_all_panes(&mut self) {
+        let pane_ids_to_make_selected: Vec<PaneId> =
+            self.left_side_panes.iter().map(|p| p.id).collect();
+        self.right_side_panes.append(&mut self.left_side_panes);
+        self.group_panes_in_zellij(pane_ids_to_make_selected);
+    }
+    pub fn handle_left_side_emptied(&mut self) {
+        self.visibility_and_focus.hide_left_side();
+        self.previous_search_string = self.search_string.drain(..).collect();
+        self.marked_index = None;
+        self.search_results = None;
+        self.update_highlighted_panes();
+    }
+    pub fn move_marked_index_down(&mut self) {
+        match self.marked_index.as_mut() {
+            Some(marked_index) => {
+                let is_searching = self.search_results.is_some();
+                let search_result_count =
+                    self.search_results.as_ref().map(|s| s.len()).unwrap_or(0);
+                if self.visibility_and_focus.left_side_is_focused()
+                    && is_searching
+                    && marked_index.main_index == search_result_count.saturating_sub(1)
+                {
+                    marked_index.main_index = 0;
+                } else if self.visibility_and_focus.left_side_is_focused()
+                    && !is_searching
+                    && marked_index.main_index == self.left_side_panes.len().saturating_sub(1)
+                {
+                    marked_index.main_index = 0;
+                } else if self.visibility_and_focus.right_side_is_focused()
+                    && marked_index.main_index == self.right_side_panes.len().saturating_sub(1)
+                {
+                    marked_index.main_index = 0;
+                } else {
+                    marked_index.main_index += 1
+                }
+            },
+            None => {
+                if self.visibility_and_focus.left_side_is_focused() {
+                    let is_searching = self.search_results.is_some();
+                    let has_search_results = self
+                        .search_results
+                        .as_ref()
+                        .map(|s| !s.is_empty())
+                        .unwrap_or(false);
+                    if is_searching && has_search_results {
+                        self.marked_index = Some(MarkedIndex::new(0));
+                    } else if !is_searching && !self.left_side_panes.is_empty() {
+                        self.marked_index = Some(MarkedIndex::new(0));
+                    }
+                } else if self.visibility_and_focus.right_side_is_focused()
+                    && !self.right_side_panes.is_empty()
+                {
+                    self.marked_index = Some(MarkedIndex::new(0));
+                }
+            },
+        }
+        self.update_highlighted_panes();
+    }
+    pub fn move_marked_index_up(&mut self) {
+        match self.marked_index.as_mut() {
+            Some(marked_index) => {
+                if self.visibility_and_focus.left_side_is_focused() && marked_index.main_index == 0
+                {
+                    if let Some(search_result_count) = self.search_results.as_ref().map(|s| s.len())
+                    {
+                        marked_index.main_index = search_result_count.saturating_sub(1);
+                    } else {
+                        marked_index.main_index = self.left_side_panes.len().saturating_sub(1);
+                    }
+                } else if self.visibility_and_focus.right_side_is_focused()
+                    && marked_index.main_index == 0
+                {
+                    marked_index.main_index = self.right_side_panes.len().saturating_sub(1);
+                } else {
+                    marked_index.main_index = marked_index.main_index.saturating_sub(1);
+                }
+            },
+            None => {
+                if self.visibility_and_focus.left_side_is_focused() {
+                    let is_searching = self.search_results.is_some();
+                    let has_search_results = self
+                        .search_results
+                        .as_ref()
+                        .map(|s| !s.is_empty())
+                        .unwrap_or(false);
+                    if is_searching && has_search_results {
+                        let search_results_count =
+                            self.search_results.as_ref().map(|s| s.len()).unwrap_or(0);
+                        self.marked_index =
+                            Some(MarkedIndex::new(search_results_count.saturating_sub(1)));
+                    } else if !is_searching && !self.left_side_panes.is_empty() {
+                        self.marked_index = Some(MarkedIndex::new(
+                            self.left_side_panes.len().saturating_sub(1),
+                        ));
+                    }
+                } else if self.visibility_and_focus.right_side_is_focused()
+                    && !self.right_side_panes.is_empty()
+                {
+                    self.marked_index = Some(MarkedIndex::new(
+                        self.right_side_panes.len().saturating_sub(1),
+                    ));
+                }
+            },
+        }
+        self.update_highlighted_panes();
+    }
+    pub fn mark_entry(&mut self) {
+        if let Some(marked_index) = self.marked_index.as_mut() {
+            marked_index.toggle_additional_mark();
+            self.update_highlighted_panes();
+        }
+    }
+    pub fn break_grouped_panes_to_new_tab(&mut self) {
+        let pane_ids_to_break_to_new_tab: Vec<PaneId> =
+            self.right_side_panes.drain(..).map(|p| p.id).collect();
+        let title_for_new_tab = if !self.previous_search_string.is_empty() {
+            Some(self.previous_search_string.clone())
+        } else {
+            None
+        };
+        break_panes_to_new_tab(&pane_ids_to_break_to_new_tab, title_for_new_tab, true);
+        self.ungroup_panes_in_zellij(pane_ids_to_break_to_new_tab);
+        close_self();
+    }
+    pub fn stack_grouped_panes(&mut self) {
+        let pane_ids_to_stack: Vec<PaneId> =
+            self.right_side_panes.drain(..).map(|p| p.id).collect();
+        stack_panes(pane_ids_to_stack.clone());
+        self.ungroup_panes_in_zellij(pane_ids_to_stack);
+        close_self();
+    }
+    pub fn float_grouped_panes(&mut self) {
+        let pane_ids_to_float: Vec<PaneId> =
+            self.right_side_panes.drain(..).map(|p| p.id).collect();
+        float_multiple_panes(pane_ids_to_float.clone());
+        self.ungroup_panes_in_zellij(pane_ids_to_float);
+        close_self();
+    }
+    pub fn embed_grouped_panes(&mut self) {
+        let pane_ids_to_embed: Vec<PaneId> =
+            self.right_side_panes.drain(..).map(|p| p.id).collect();
+        embed_multiple_panes(pane_ids_to_embed.clone());
+        self.ungroup_panes_in_zellij(pane_ids_to_embed);
+        close_self();
+    }
+    pub fn break_grouped_panes_right(&mut self) {
+        if let Some(own_tab_index) = self.own_tab_index {
+            if Some(own_tab_index + 1) < self.total_tabs_in_session {
+                let pane_ids_to_break_right: Vec<PaneId> =
+                    self.right_side_panes.drain(..).map(|p| p.id).collect();
+                break_panes_to_tab_with_index(&pane_ids_to_break_right, own_tab_index + 1, true);
+            } else {
+                let pane_ids_to_break_to_new_tab: Vec<PaneId> =
+                    self.right_side_panes.drain(..).map(|p| p.id).collect();
+                let title_for_new_tab = if !self.previous_search_string.is_empty() {
+                    Some(self.previous_search_string.clone())
+                } else {
+                    None
+                };
+                break_panes_to_new_tab(&pane_ids_to_break_to_new_tab, title_for_new_tab, true);
+            }
+            close_self();
+        }
+    }
+    pub fn break_grouped_panes_left(&mut self) {
+        if let Some(own_tab_index) = self.own_tab_index {
+            if own_tab_index > 0 {
+                let pane_ids_to_break_left: Vec<PaneId> =
+                    self.right_side_panes.drain(..).map(|p| p.id).collect();
+                break_panes_to_tab_with_index(
+                    &pane_ids_to_break_left,
+                    own_tab_index.saturating_sub(1),
+                    true,
+                );
+            } else {
+                let pane_ids_to_break_to_new_tab: Vec<PaneId> =
+                    self.right_side_panes.drain(..).map(|p| p.id).collect();
+                let title_for_new_tab = if !self.previous_search_string.is_empty() {
+                    Some(self.previous_search_string.clone())
+                } else {
+                    None
+                };
+                break_panes_to_new_tab(&pane_ids_to_break_to_new_tab, title_for_new_tab, true);
+            }
+            close_self();
+        }
+    }
+    pub fn close_grouped_panes(&mut self) {
+        let pane_ids_to_close: Vec<PaneId> =
+            self.right_side_panes.drain(..).map(|p| p.id).collect();
+        close_multiple_panes(pane_ids_to_close);
+        close_self();
+    }
+}

default-plugins/multiple-select/src/ui.rs

@@ -0,0 +1,873 @@
+use crate::{App, VisibilityAndFocus};
+use zellij_tile::prelude::*;
+
+const TOP_LEFT_CORNER_CHARACTER: &'static str = "┌";
+const TOP_RIGHT_CORNER_CHARACTER: &'static str = "┐";
+const BOTTOM_LEFT_CORNER_CHARACTER: &'static str = "└";
+const BOTTOM_RIGHT_CORNER_CHARACTER: &'static str = "┘";
+const BOUNDARY_CHARACTER: &'static str = "│";
+const HORIZONTAL_BOUNDARY_CHARACTER: &'static str = "─";
+
+#[derive(Debug, Clone)]
+pub struct PaneItem {
+    pub text: String,
+    pub id: PaneId,
+    pub color_indices: Vec<usize>,
+}
+
+impl PaneItem {
+    pub fn clear(&mut self) {
+        self.color_indices.clear();
+    }
+    pub fn render(&self, max_width_for_item: usize) -> NestedListItem {
+        let pane_item_text_len = self.text.chars().count();
+        if pane_item_text_len <= max_width_for_item {
+            NestedListItem::new(&self.text)
+                .color_range(0, ..)
+                .color_indices(3, self.color_indices.iter().copied().collect())
+        } else {
+            let length_of_each_half = max_width_for_item.saturating_sub(3) / 2;
+            let first_half: String = self.text.chars().take(length_of_each_half).collect();
+            let second_half: String = self
+                .text
+                .chars()
+                .rev()
+                .take(length_of_each_half)
+                .collect::<Vec<_>>()
+                .iter()
+                .rev()
+                .collect();
+            let second_half_start_index = pane_item_text_len.saturating_sub(length_of_each_half);
+            let adjusted_indices: Vec<usize> = self
+                .color_indices
+                .iter()
+                .filter_map(|i| {
+                    if i < &length_of_each_half {
+                        Some(*i)
+                    } else if i >= &second_half_start_index {
+                        Some(i.saturating_sub(second_half_start_index) + length_of_each_half + 3)
+                    //3 for the bulletin
+                    } else {
+                        None
+                    }
+                })
+                .collect();
+            NestedListItem::new(format!("{}...{}", first_half, second_half))
+                .color_range(0, ..)
+                .color_indices(3, adjusted_indices)
+        }
+    }
+}
+
+// rendering code
+impl App {
+    pub fn render_close_shortcut(&self, cols: usize) {
+        let should_render_close_shortcut =
+            self.visibility_and_focus.left_side_is_focused() && self.marked_index.is_none();
+        if should_render_close_shortcut {
+            let x_coordinates_right_padding =
+                if self.visibility_and_focus.only_left_side_is_focused() {
+                    5
+                } else {
+                    1
+                };
+            let ctrl_c_shortcut_text = "<Ctrl c> - Close";
+            let ctrl_c_shortcut = Text::new(ctrl_c_shortcut_text).color_range(3, ..=7);
+            print_text_with_coordinates(
+                ctrl_c_shortcut,
+                cols.saturating_sub(ctrl_c_shortcut_text.chars().count())
+                    .saturating_sub(x_coordinates_right_padding),
+                0,
+                None,
+                None,
+            );
+        }
+    }
+    pub fn render_tab_shortcut(&self, cols: usize, rows: usize) {
+        match self.visibility_and_focus {
+            VisibilityAndFocus::BothSidesVisibleRightSideFocused => {
+                let side_width = self.calculate_side_width(cols);
+                let tab_shortcut = Text::new("<TAB> - select more panes").color_range(3, ..=4);
+                print_text_with_coordinates(
+                    tab_shortcut,
+                    side_width + 6,
+                    rows.saturating_sub(2),
+                    None,
+                    None,
+                );
+            },
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused => {
+                let side_width = self.calculate_side_width(cols);
+                let tab_shortcut_text = "<TAB> - browse selected panes";
+                let tab_shortcut = Text::new(tab_shortcut_text).color_range(3, ..=4);
+                print_text_with_coordinates(
+                    tab_shortcut,
+                    side_width.saturating_sub(tab_shortcut_text.chars().count() + 1),
+                    rows.saturating_sub(2),
+                    None,
+                    None,
+                );
+            },
+            VisibilityAndFocus::OnlyRightSideVisible => {
+                let tab_shortcut = Text::new("<TAB> - select more panes").color_range(3, ..=4);
+                print_text_with_coordinates(tab_shortcut, 4, rows.saturating_sub(2), None, None);
+            },
+            VisibilityAndFocus::OnlyLeftSideVisible => {
+                // not visible
+            },
+        };
+    }
+    pub fn render_left_side(&self, rows: usize, cols: usize, is_focused: bool) {
+        let title_y = 0;
+        let left_side_base_x = 1;
+        let list_y = 2;
+        let side_width = self.calculate_side_width(cols);
+        let max_left_list_height = rows.saturating_sub(8);
+        let (
+            extra_pane_count_on_top_left,
+            extra_pane_count_on_bottom_left,
+            extra_selected_item_count_on_top_left,
+            extra_selected_item_count_on_bottom_left,
+            left_side_panes,
+        ) = self.left_side_panes_list(side_width, max_left_list_height);
+        let (filter_prompt_text, filter_prompt) = self.filter_panes_prompt();
+        let filter = self.filter(side_width.saturating_sub(filter_prompt_text.chars().count() + 1));
+        let (
+            _enter_select_panes_text,
+            enter_select_panes,
+            space_shortcut_text,
+            space_shortcut,
+            _escape_shortcut_text,
+            escape_shortcut,
+        ) = self.left_side_controls(side_width);
+        print_text_with_coordinates(filter_prompt, left_side_base_x, title_y, None, None);
+        if is_focused {
+            print_text_with_coordinates(
+                filter,
+                left_side_base_x + filter_prompt_text.chars().count(),
+                title_y,
+                None,
+                None,
+            );
+        }
+        print_nested_list_with_coordinates(
+            left_side_panes.clone(),
+            left_side_base_x,
+            list_y,
+            Some(side_width),
+            None,
+        );
+        if is_focused {
+            if let Some(marked_index) = self.marked_index.as_ref().map(|i| i.main_index) {
+                print_text_with_coordinates(
+                    Text::new(">").color_range(3, ..).selected(),
+                    left_side_base_x + 1,
+                    (list_y + marked_index).saturating_sub(extra_pane_count_on_top_left),
+                    None,
+                    None,
+                );
+            }
+        }
+        if extra_pane_count_on_top_left > 0 {
+            self.print_extra_pane_count(
+                extra_pane_count_on_top_left,
+                extra_selected_item_count_on_top_left,
+                list_y.saturating_sub(1),
+                left_side_base_x,
+                side_width,
+            );
+        }
+        if extra_pane_count_on_bottom_left > 0 {
+            self.print_extra_pane_count(
+                extra_pane_count_on_bottom_left,
+                extra_selected_item_count_on_bottom_left,
+                list_y + left_side_panes.len(),
+                left_side_base_x,
+                side_width,
+            );
+        }
+        if is_focused && !left_side_panes.is_empty() {
+            let controls_x = 1;
+            print_text_with_coordinates(
+                enter_select_panes,
+                controls_x,
+                list_y + left_side_panes.len() + 1,
+                None,
+                None,
+            );
+            if self.marked_index.is_some() {
+                print_text_with_coordinates(
+                    space_shortcut.clone(),
+                    controls_x,
+                    list_y + left_side_panes.len() + 2,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    escape_shortcut.clone(),
+                    controls_x + space_shortcut_text.chars().count() + 1,
+                    list_y + left_side_panes.len() + 2,
+                    None,
+                    None,
+                );
+            }
+        }
+    }
+    pub fn render_right_side(&self, rows: usize, cols: usize, is_focused: bool) {
+        let side_width = self.calculate_side_width(cols);
+        let right_side_base_x = match self.visibility_and_focus {
+            VisibilityAndFocus::OnlyLeftSideVisible | VisibilityAndFocus::OnlyRightSideVisible => 1,
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            | VisibilityAndFocus::BothSidesVisibleRightSideFocused => side_width + 4,
+        };
+        let title_y = 0;
+        let list_y: usize = 2;
+        let max_right_list_height = rows.saturating_sub(11);
+        let selected_prompt = self.selected_panes_title();
+        let (
+            extra_pane_count_on_top_right,
+            extra_pane_count_on_bottom_right,
+            extra_selected_item_count_on_top_right,
+            extra_selected_item_count_on_bottom_right,
+            right_side_panes,
+        ) = self.right_side_panes_list(side_width, max_right_list_height);
+        let right_side_pane_count = right_side_panes.len();
+        let (
+            right_side_controls_1,
+            right_side_controls_2,
+            right_side_controls_3,
+            right_side_controls_4,
+        ) = self.right_side_controls(side_width);
+        if extra_pane_count_on_top_right > 0 {
+            self.print_extra_pane_count(
+                extra_pane_count_on_top_right,
+                extra_selected_item_count_on_top_right,
+                list_y.saturating_sub(1),
+                right_side_base_x,
+                side_width,
+            );
+        }
+        if extra_pane_count_on_bottom_right > 0 {
+            self.print_extra_pane_count(
+                extra_pane_count_on_bottom_right,
+                extra_selected_item_count_on_bottom_right,
+                list_y + right_side_panes.len(),
+                right_side_base_x,
+                side_width,
+            );
+        }
+        print_text_with_coordinates(selected_prompt, right_side_base_x + 3, title_y, None, None);
+        print_nested_list_with_coordinates(
+            right_side_panes,
+            right_side_base_x,
+            list_y,
+            Some(side_width),
+            None,
+        );
+        if is_focused {
+            if let Some(marked_index) = self.marked_index.as_ref().map(|i| i.main_index) {
+                print_text_with_coordinates(
+                    Text::new(">").color_range(3, ..).selected(),
+                    right_side_base_x + 1,
+                    (list_y + marked_index).saturating_sub(extra_pane_count_on_top_right),
+                    None,
+                    None,
+                );
+            }
+        }
+        if is_focused && !self.right_side_panes.is_empty() {
+            print_text_with_coordinates(
+                right_side_controls_1,
+                right_side_base_x + 1,
+                list_y + right_side_pane_count + 1,
+                None,
+                None,
+            );
+            print_text_with_coordinates(
+                right_side_controls_2,
+                right_side_base_x + 1,
+                list_y + right_side_pane_count + 3,
+                None,
+                None,
+            );
+            print_text_with_coordinates(
+                right_side_controls_3,
+                right_side_base_x + 1,
+                list_y + right_side_pane_count + 4,
+                None,
+                None,
+            );
+            print_text_with_coordinates(
+                right_side_controls_4,
+                right_side_base_x + 1,
+                list_y + right_side_pane_count + 5,
+                None,
+                None,
+            );
+        }
+    }
+    pub fn render_help_line(&self, rows: usize, cols: usize) {
+        let help_line_text = match self.visibility_and_focus {
+            VisibilityAndFocus::OnlyLeftSideVisible => {
+                let full_help_line = "Help: Select one or more panes to group for bulk operations";
+                let short_help_line = "Help: Select panes to group";
+                if cols >= full_help_line.chars().count() {
+                    full_help_line
+                } else {
+                    short_help_line
+                }
+            },
+            VisibilityAndFocus::OnlyRightSideVisible => {
+                let full_help_line = "Help: Perform bulk operations on all selected panes";
+                let short_help_line = "Help: Perform bulk operations";
+                if cols >= full_help_line.chars().count() {
+                    full_help_line
+                } else {
+                    short_help_line
+                }
+            },
+            _ => {
+                let full_help_line =
+                    "Help: Select panes on the left, then perform operations on the right.";
+                let short_help_line = "Help: Group panes for bulk operations";
+                if cols >= full_help_line.chars().count() {
+                    full_help_line
+                } else {
+                    short_help_line
+                }
+            },
+        };
+        let help_line = Text::new(help_line_text);
+        print_text_with_coordinates(help_line, 0, rows, None, None);
+    }
+    pub fn render_focus_boundary(&self, rows: usize, cols: usize) {
+        let side_width = self.calculate_side_width(cols);
+        let x = match self.visibility_and_focus {
+            VisibilityAndFocus::OnlyRightSideVisible => 0,
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            | VisibilityAndFocus::BothSidesVisibleRightSideFocused
+            | VisibilityAndFocus::OnlyLeftSideVisible => side_width + 2,
+        };
+        let y = 0;
+        let height = rows.saturating_sub(2);
+        for i in y..=height {
+            if i == y && self.visibility_and_focus.left_side_is_focused() {
+                print_text_with_coordinates(
+                    Text::new(TOP_RIGHT_CORNER_CHARACTER),
+                    x,
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x.saturating_sub(1),
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x.saturating_sub(2),
+                    i,
+                    None,
+                    None,
+                );
+            } else if i == y && !self.visibility_and_focus.left_side_is_focused() {
+                print_text_with_coordinates(Text::new(TOP_LEFT_CORNER_CHARACTER), x, i, None, None);
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x + 1,
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x + 2,
+                    i,
+                    None,
+                    None,
+                );
+            } else if i == height && self.visibility_and_focus.left_side_is_focused() {
+                print_text_with_coordinates(
+                    Text::new(BOTTOM_RIGHT_CORNER_CHARACTER),
+                    x,
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x.saturating_sub(1),
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x.saturating_sub(2),
+                    i,
+                    None,
+                    None,
+                );
+            } else if i == height && !self.visibility_and_focus.left_side_is_focused() {
+                print_text_with_coordinates(
+                    Text::new(BOTTOM_LEFT_CORNER_CHARACTER),
+                    x,
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x + 1,
+                    i,
+                    None,
+                    None,
+                );
+                print_text_with_coordinates(
+                    Text::new(HORIZONTAL_BOUNDARY_CHARACTER),
+                    x + 2,
+                    i,
+                    None,
+                    None,
+                );
+            } else {
+                print_text_with_coordinates(Text::new(BOUNDARY_CHARACTER), x, i, None, None);
+            }
+        }
+    }
+    pub fn calculate_side_width(&self, cols: usize) -> usize {
+        match self.visibility_and_focus {
+            VisibilityAndFocus::OnlyLeftSideVisible | VisibilityAndFocus::OnlyRightSideVisible => {
+                cols.saturating_sub(4)
+            },
+            VisibilityAndFocus::BothSidesVisibleLeftSideFocused
+            | VisibilityAndFocus::BothSidesVisibleRightSideFocused => (cols / 2).saturating_sub(3),
+        }
+    }
+}
+
+// ui components
+impl App {
+    fn filter_panes_prompt(&self) -> (&'static str, Text) {
+        let search_prompt_text = if self.search_string.is_empty() {
+            "ALL PANES "
+        } else {
+            "FILTER: "
+        };
+        let search_prompt = if self.visibility_and_focus.left_side_is_focused() {
+            Text::new(&search_prompt_text).color_range(2, ..)
+        } else {
+            Text::new(&search_prompt_text)
+        };
+        (search_prompt_text, search_prompt)
+    }
+    fn filter(&self, max_width: usize) -> Text {
+        let search_string_text = if self.marked_index.is_none() && self.search_string.is_empty() {
+            let full = "[Type filter term...]";
+            let short = "[...]";
+            if max_width >= full.chars().count() {
+                full.to_owned()
+            } else {
+                short.to_owned()
+            }
+        } else if self.marked_index.is_none() && !self.search_string.is_empty() {
+            if max_width >= self.search_string.chars().count() + 1 {
+                format!("{}_", self.search_string)
+            } else {
+                let truncated: String = self
+                    .search_string
+                    .chars()
+                    .rev()
+                    .take(max_width.saturating_sub(4))
+                    .collect::<Vec<_>>()
+                    .iter()
+                    .rev()
+                    .collect();
+                format!("...{}_", truncated)
+            }
+        } else if self.marked_index.is_some() && !self.search_string.is_empty() {
+            if max_width >= self.search_string.chars().count() {
+                format!("{}", self.search_string)
+            } else {
+                let truncated: String = self
+                    .search_string
+                    .chars()
+                    .rev()
+                    .take(max_width.saturating_sub(4))
+                    .collect::<Vec<_>>()
+                    .iter()
+                    .rev()
+                    .collect();
+                format!("...{}", truncated)
+            }
+        } else {
+            format!("")
+        };
+        Text::new(&search_string_text).color_range(3, ..)
+    }
+    fn left_side_panes_list(
+        &self,
+        max_width: usize,
+        max_list_height: usize,
+    ) -> (usize, usize, usize, usize, Vec<NestedListItem>) {
+        // returns: extra_pane_count_on_top, extra_pane_count_on_bottom,
+        // extra_selected_item_count_on_top, extra_selected_item_count_on_bottom, list
+        let mut left_side_panes = vec![];
+        let pane_items_on_the_left = self
+            .search_results
+            .as_ref()
+            .unwrap_or_else(|| &self.left_side_panes);
+        let max_width_for_item = max_width.saturating_sub(3); // 3 for the list bulletin
+        let item_count = pane_items_on_the_left.iter().count();
+        let first_item_index = if self.visibility_and_focus.left_side_is_focused() {
+            self.marked_index
+                .as_ref()
+                .map(|s| s.main_index.saturating_sub(max_list_height / 2))
+                .unwrap_or(0)
+        } else {
+            0
+        };
+        let last_item_index = std::cmp::min(
+            (max_list_height + first_item_index).saturating_sub(1),
+            item_count.saturating_sub(1),
+        );
+        for (i, pane_item) in pane_items_on_the_left
+            .iter()
+            .enumerate()
+            .skip(first_item_index)
+        {
+            if i > last_item_index {
+                break;
+            }
+            let mut item = pane_item.render(max_width_for_item);
+            if Some(i) == self.marked_index.as_ref().map(|s| s.main_index)
+                && self.visibility_and_focus.left_side_is_focused()
+            {
+                item = item.selected();
+                if self
+                    .marked_index
+                    .as_ref()
+                    .map(|s| s.additional_indices.contains(&i))
+                    .unwrap_or(false)
+                {
+                    item = item.selected().color_range(1, ..);
+                }
+            } else if self
+                .marked_index
+                .as_ref()
+                .map(|s| s.additional_indices.contains(&i))
+                .unwrap_or(false)
+                && self.visibility_and_focus.left_side_is_focused()
+            {
+                item = item.selected();
+            }
+            left_side_panes.push(item);
+        }
+        let extra_panes_on_top = first_item_index;
+        let extra_panes_on_bottom = item_count.saturating_sub(last_item_index + 1);
+        let extra_selected_item_count_on_top = if self.visibility_and_focus.left_side_is_focused() {
+            self.marked_index
+                .as_ref()
+                .map(|s| {
+                    s.additional_indices
+                        .iter()
+                        .filter(|a| a < &&first_item_index)
+                        .count()
+                })
+                .unwrap_or(0)
+        } else {
+            0
+        };
+        let extra_selected_item_count_on_bottom =
+            if self.visibility_and_focus.left_side_is_focused() {
+                self.marked_index
+                    .as_ref()
+                    .map(|s| {
+                        s.additional_indices
+                            .iter()
+                            .filter(|a| a > &&last_item_index)
+                            .count()
+                    })
+                    .unwrap_or(0)
+            } else {
+                0
+            };
+        (
+            extra_panes_on_top,
+            extra_panes_on_bottom,
+            extra_selected_item_count_on_top,
+            extra_selected_item_count_on_bottom,
+            left_side_panes,
+        )
+    }
+    fn left_side_controls(
+        &self,
+        max_width: usize,
+    ) -> (&'static str, Text, &'static str, Text, &'static str, Text) {
+        // returns three components and their text
+        let (enter_select_panes_text, enter_select_panes) = if self.marked_index.is_some() {
+            let enter_select_panes_text_full = "<ENTER> - select, <↓↑→> - navigate";
+            let enter_select_panes_text_short = "<ENTER> / <↓↑→>...";
+            if max_width >= enter_select_panes_text_full.chars().count() {
+                let enter_select_panes_full = Text::new(enter_select_panes_text_full)
+                    .color_range(3, ..=6)
+                    .color_range(3, 18..=22);
+                (enter_select_panes_text_full, enter_select_panes_full)
+            } else {
+                let enter_select_panes_short = Text::new(enter_select_panes_text_short)
+                    .color_range(3, ..=6)
+                    .color_range(3, 10..=14);
+                (enter_select_panes_text_short, enter_select_panes_short)
+            }
+        } else {
+            let enter_select_panes_text_full = "<ENTER> - select all, <↓↑> - navigate";
+            let enter_select_panes_text_short = "<ENTER> / <↓↑>...";
+            if max_width >= enter_select_panes_text_full.chars().count() {
+                let enter_select_panes_full = Text::new(enter_select_panes_text_full)
+                    .color_range(3, ..=6)
+                    .color_range(3, 21..=25);
+                (enter_select_panes_text_full, enter_select_panes_full)
+            } else {
+                let enter_select_panes_short = Text::new(enter_select_panes_text_short)
+                    .color_range(3, ..=6)
+                    .color_range(3, 10..=13);
+                (enter_select_panes_text_short, enter_select_panes_short)
+            }
+        };
+        let space_shortcut_text_full = "<SPACE> - mark many,";
+        let space_shortcut_text_short = "<SPACE> /";
+        if self.marked_index.is_some() {
+            let escape_shortcut_text_full = "<Ctrl c> - remove marks";
+            let escape_shortcut_text_short = "<Ctrl c>...";
+            let (escape_shortcut, space_shortcut, escape_shortcut_text, space_shortcut_text) =
+                if max_width
+                    >= space_shortcut_text_full.chars().count()
+                        + escape_shortcut_text_full.chars().count()
+                {
+                    (
+                        Text::new(escape_shortcut_text_full).color_range(3, ..=7),
+                        Text::new(space_shortcut_text_full).color_range(3, ..=6),
+                        escape_shortcut_text_full,
+                        space_shortcut_text_full,
+                    )
+                } else {
+                    (
+                        Text::new(escape_shortcut_text_short).color_range(3, ..=7),
+                        Text::new(space_shortcut_text_short).color_range(3, ..=6),
+                        escape_shortcut_text_short,
+                        space_shortcut_text_short,
+                    )
+                };
+            (
+                enter_select_panes_text,
+                enter_select_panes,
+                space_shortcut_text,
+                space_shortcut,
+                escape_shortcut_text,
+                escape_shortcut,
+            )
+        } else {
+            let escape_shortcut_text = if self.right_side_panes.is_empty() {
+                "<Ctrl c> - Close"
+            } else {
+                ""
+            };
+            let escape_shortcut = Text::new(escape_shortcut_text).color_range(3, ..=7);
+            let space_shortcut = Text::new(space_shortcut_text_full).color_range(3, ..=6);
+            (
+                enter_select_panes_text,
+                enter_select_panes,
+                space_shortcut_text_full,
+                space_shortcut,
+                escape_shortcut_text,
+                escape_shortcut,
+            )
+        }
+    }
+    fn selected_panes_title(&self) -> Text {
+        let selected_prompt_text = "SELECTED PANES: ";
+        let selected_prompt = if self.visibility_and_focus.left_side_is_focused() {
+            Text::new(selected_prompt_text)
+        } else {
+            Text::new(selected_prompt_text).color_range(2, ..)
+        };
+        selected_prompt
+    }
+    fn right_side_panes_list(
+        &self,
+        max_width: usize,
+        max_list_height: usize,
+    ) -> (usize, usize, usize, usize, Vec<NestedListItem>) {
+        // returns: extra_pane_count_on_top, extra_pane_count_on_bottom,
+        // extra_selected_item_count_on_top, extra_selected_item_count_on_bottom, list
+        let mut right_side_panes = vec![];
+        let item_count = self.right_side_panes.iter().count();
+        let first_item_index = if self.visibility_and_focus.left_side_is_focused() {
+            0
+        } else {
+            self.marked_index
+                .as_ref()
+                .map(|s| s.main_index.saturating_sub(max_list_height / 2))
+                .unwrap_or(0)
+        };
+        let last_item_index = std::cmp::min(
+            (max_list_height + first_item_index).saturating_sub(1),
+            item_count.saturating_sub(1),
+        );
+
+        let max_width_for_item = max_width.saturating_sub(3); // 3 for the list bulletin
+        for (i, pane_item) in self
+            .right_side_panes
+            .iter()
+            .enumerate()
+            .skip(first_item_index)
+        {
+            if i > last_item_index {
+                break;
+            }
+            let mut item = pane_item.render(max_width_for_item);
+            if &Some(i) == &self.marked_index.as_ref().map(|s| s.main_index)
+                && self.visibility_and_focus.right_side_is_focused()
+            {
+                item = item.selected();
+                if self
+                    .marked_index
+                    .as_ref()
+                    .map(|s| s.additional_indices.contains(&i))
+                    .unwrap_or(false)
+                {
+                    item = item.selected().color_range(1, ..);
+                }
+            } else if self
+                .marked_index
+                .as_ref()
+                .map(|s| s.additional_indices.contains(&i))
+                .unwrap_or(false)
+                && self.visibility_and_focus.right_side_is_focused()
+            {
+                item = item.selected();
+            }
+            right_side_panes.push(item);
+        }
+
+        let extra_panes_on_top = first_item_index;
+        let extra_panes_on_bottom = self
+            .right_side_panes
+            .iter()
+            .len()
+            .saturating_sub(last_item_index + 1);
+        let extra_selected_item_count_on_top = if self.visibility_and_focus.left_side_is_focused() {
+            0
+        } else {
+            self.marked_index
+                .as_ref()
+                .map(|s| {
+                    s.additional_indices
+                        .iter()
+                        .filter(|a| a < &&first_item_index)
+                        .count()
+                })
+                .unwrap_or(0)
+        };
+        let extra_selected_item_count_on_bottom =
+            if self.visibility_and_focus.left_side_is_focused() {
+                0
+            } else {
+                self.marked_index
+                    .as_ref()
+                    .map(|s| {
+                        s.additional_indices
+                            .iter()
+                            .filter(|a| a > &&last_item_index)
+                            .count()
+                    })
+                    .unwrap_or(0)
+            };
+        (
+            extra_panes_on_top,
+            extra_panes_on_bottom,
+            extra_selected_item_count_on_top,
+            extra_selected_item_count_on_bottom,
+            right_side_panes,
+        )
+    }
+    fn right_side_controls(&self, cols: usize) -> (Text, Text, Text, Text) {
+        let right_side_controls_text_1_full = "<←↓↑> - navigate, <Ctrl c> - clear";
+        let right_side_controls_text_1_short = "<←↓↑>/<Ctrl c>...";
+        let right_side_controls_1 = if cols >= right_side_controls_text_1_full.chars().count() {
+            Text::new(right_side_controls_text_1_full)
+                .color_range(3, ..=4)
+                .color_range(3, 18..=25)
+        } else {
+            Text::new(right_side_controls_text_1_short)
+                .color_range(3, ..=4)
+                .color_range(3, 6..=13)
+        };
+        let right_side_controls_text_2_full = "<b> - break out, <s> - stack, <c> - close";
+        let right_side_controls_text_2_short = "<b>/<s>/<c>...";
+        let right_side_controls_2 = if cols >= right_side_controls_text_2_full.chars().count() {
+            Text::new(right_side_controls_text_2_full)
+                .color_range(3, ..=2)
+                .color_range(3, 17..=19)
+                .color_range(3, 30..=32)
+        } else {
+            Text::new(right_side_controls_text_2_short)
+                .color_range(3, ..=2)
+                .color_range(3, 4..=6)
+                .color_range(3, 8..=10)
+        };
+        let right_side_controls_text_3_full = "<r> - break right, <l> - break left";
+        let right_side_controls_text_3_short = "<r>/<l>...";
+        let right_side_controls_3 = if cols >= right_side_controls_text_3_full.chars().count() {
+            Text::new(right_side_controls_text_3_full)
+                .color_range(3, ..=2)
+                .color_range(3, 19..=21)
+        } else {
+            Text::new(right_side_controls_text_3_short)
+                .color_range(3, ..=2)
+                .color_range(3, 4..=6)
+        };
+        let right_side_controls_text_4_full = "<e> - embed, <f> - float";
+        let right_side_controls_text_4_short = "<e>/<f>...";
+        let right_side_controls_4 = if cols >= right_side_controls_text_4_full.chars().count() {
+            Text::new(right_side_controls_text_4_full)
+                .color_range(3, ..=2)
+                .color_range(3, 13..=15)
+        } else {
+            Text::new(right_side_controls_text_4_short)
+                .color_range(3, ..=2)
+                .color_range(3, 4..=6)
+        };
+        (
+            right_side_controls_1,
+            right_side_controls_2,
+            right_side_controls_3,
+            right_side_controls_4,
+        )
+    }
+    fn print_extra_pane_count(
+        &self,
+        count: usize,
+        selected_count: usize,
+        y: usize,
+        list_x: usize,
+        list_width: usize,
+    ) {
+        let extra_count_text = if selected_count > 0 {
+            format!("[+{} ({} selected)]", count, selected_count)
+        } else {
+            format!("[+{}]", count)
+        };
+        let extra_count = Text::new(&extra_count_text).color_range(1, ..);
+        print_text_with_coordinates(
+            extra_count,
+            (list_x + list_width).saturating_sub(extra_count_text.chars().count()),
+            y,
+            None,
+            None,
+        );
+    }
+}

default-plugins/status-bar/src/main.rs

@@ -39,6 +39,8 @@ struct State {
     display_system_clipboard_failure: bool,
     classic_ui: bool,
     base_mode_is_locked: bool,
+    own_client_id: Option<ClientId>,
+    grouped_panes_count: Option<usize>,
 }
 
 register_plugin!(State);
@@ -197,10 +199,12 @@ impl ZellijPlugin for State {
             .get("classic")
             .map(|c| c == "true")
             .unwrap_or(false);
+        self.own_client_id = Some(get_plugin_ids().client_id);
         set_selectable(false);
         subscribe(&[
             EventType::ModeUpdate,
             EventType::TabUpdate,
+            EventType::PaneUpdate,
             EventType::CopyToClipboard,
             EventType::InputReceived,
             EventType::SystemClipboardFailure,
@@ -223,6 +227,28 @@ impl ZellijPlugin for State {
                 }
                 self.tabs = tabs;
             },
+            Event::PaneUpdate(pane_manifest) => {
+                if let Some(own_client_id) = self.own_client_id {
+                    let mut grouped_panes_count = 0;
+                    for (_tab_index, pane_infos) in pane_manifest.panes {
+                        for pane_info in pane_infos {
+                            let is_in_pane_group =
+                                pane_info.index_in_pane_group.get(&own_client_id).is_some();
+                            if is_in_pane_group {
+                                grouped_panes_count += 1;
+                            }
+                        }
+                    }
+                    if Some(grouped_panes_count) != self.grouped_panes_count {
+                        if grouped_panes_count == 0 {
+                            self.grouped_panes_count = None;
+                        } else {
+                            self.grouped_panes_count = Some(grouped_panes_count);
+                        }
+                        should_render = true;
+                    }
+                }
+            },
             Event::CopyToClipboard(copy_destination) => {
                 match self.text_copy_destination {
                     Some(text_copy_destination) => {
@@ -280,6 +306,7 @@ impl ZellijPlugin for State {
                     self.base_mode_is_locked,
                     self.text_copy_destination,
                     self.display_system_clipboard_failure,
+                    self.grouped_panes_count,
                 ),
                 fill_bg,
             );

default-plugins/status-bar/src/one_line_ui.rs

@@ -6,7 +6,7 @@ use ansi_term::{
 use std::collections::HashMap;
 use zellij_tile::prelude::actions::Action;
 use zellij_tile::prelude::*;
-use zellij_tile_utils::palette_match;
+use zellij_tile_utils::{palette_match, style};
 
 use crate::first_line::{to_char, KeyAction, KeyMode, KeyShortcut};
 use crate::second_line::{system_clipboard_error, text_copied_hint};
@@ -22,6 +22,7 @@ pub fn one_line_ui(
     base_mode_is_locked: bool,
     text_copied_to_clipboard_destination: Option<CopyDestination>,
     clipboard_failure: bool,
+    grouped_pane_count: Option<usize>,
 ) -> LinePart {
     if let Some(text_copied_to_clipboard_destination) = text_copied_to_clipboard_destination {
         return text_copied_hint(text_copied_to_clipboard_destination);
@@ -35,10 +36,17 @@ pub fn one_line_ui(
         *max_len = max_len.saturating_sub(line_part.len);
     };
 
+    let currently_marking_pane_group = help.currently_marking_pane_group.unwrap_or(false);
     render_mode_key_indicators(help, max_len, separator, base_mode_is_locked)
         .map(|mode_key_indicators| append(&mode_key_indicators, &mut max_len))
         .and_then(|_| match help.mode {
-            InputMode::Normal | InputMode::Locked => render_secondary_info(help, tab_info, max_len)
+            InputMode::Normal | InputMode::Locked => match grouped_pane_count {
+                Some(grouped_pane_count) => {
+                    render_group_controls(help, grouped_pane_count, max_len)
+                },
+                None if currently_marking_pane_group => render_group_controls(help, 0, max_len),
+                None => render_secondary_info(help, tab_info, max_len),
+            }
             .map(|secondary_info| append(&secondary_info, &mut max_len)),
             _ => add_keygroup_separator(help, max_len)
                 .map(|key_group_separator| append(&key_group_separator, &mut max_len))
@@ -656,6 +664,225 @@ fn render_common_modifiers(
     line_part_to_render.len += prefix_text.chars().count() + separator.chars().count();
 }
 
+fn render_group_controls(
+    help: &ModeInfo,
+    grouped_pane_count: usize,
+    max_len: usize,
+) -> Option<LinePart> {
+    let currently_marking_group = help.currently_marking_pane_group.unwrap_or(false);
+    let keymap = help.get_mode_keybinds();
+    let (common_modifiers, multiple_select_key, pane_group_toggle_key, group_mark_toggle_key) = {
+        let multiple_select_key = multiple_select_key(&keymap);
+        let pane_group_toggle_key = single_action_key(&keymap, &[Action::TogglePaneInGroup]);
+        let group_mark_toggle_key = single_action_key(&keymap, &[Action::ToggleGroupMarking]);
+        let common_modifiers = get_common_modifiers(
+            vec![
+                multiple_select_key.iter().next(),
+                pane_group_toggle_key.iter().next(),
+                group_mark_toggle_key.iter().next(),
+            ]
+            .into_iter()
+            .filter_map(|k| k)
+            .collect(),
+        );
+        let multiple_select_key: Vec<KeyWithModifier> = multiple_select_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        let pane_group_toggle_key: Vec<KeyWithModifier> = pane_group_toggle_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        let group_mark_toggle_key: Vec<KeyWithModifier> = group_mark_toggle_key
+            .iter()
+            .map(|k| k.strip_common_modifiers(&common_modifiers))
+            .collect();
+        (
+            common_modifiers,
+            multiple_select_key,
+            pane_group_toggle_key,
+            group_mark_toggle_key,
+        )
+    };
+    let multiple_select_key = multiple_select_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let pane_group_toggle_key = pane_group_toggle_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let group_mark_toggle_key = group_mark_toggle_key
+        .iter()
+        .next()
+        .map(|key| format!("{}", key))
+        .unwrap_or("UNBOUND".to_owned());
+    let background = help.style.colors.text_unselected.background;
+    let foreground = help.style.colors.text_unselected.base;
+    let superkey_prefix_style = style!(foreground, background).bold();
+    let common_modifier_text = if common_modifiers.is_empty() {
+        "".to_owned()
+    } else {
+        format!(
+            "{} + ",
+            common_modifiers
+                .iter()
+                .map(|c| c.to_string())
+                .collect::<Vec<_>>()
+                .join("-")
+        )
+    };
+
+    // full
+    let full_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED PANES", grouped_pane_count)
+    } else {
+        format!("{} SELECTED PANES |", grouped_pane_count)
+    };
+    let full_group_actions_text = format!("<{}> Group Actions", &multiple_select_key);
+    let full_toggle_group_text = format!("<{}> Toggle Group", &pane_group_toggle_key);
+    let full_group_mark_toggle_text = format!("<{}> Follow Focus", &group_mark_toggle_key);
+    let ribbon_paddings_len = 12;
+    let full_controls_line_len = full_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + full_group_actions_text.chars().count()
+        + full_toggle_group_text.chars().count()
+        + full_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    // medium
+    let medium_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED", grouped_pane_count)
+    } else {
+        format!("{} SELECTED |", grouped_pane_count)
+    };
+    let medium_group_actions_text = format!("<{}> Actions", &multiple_select_key);
+    let medium_toggle_group_text = format!("<{}> Toggle", &pane_group_toggle_key);
+    let medium_group_mark_toggle_text = format!("<{}> Follow", &group_mark_toggle_key);
+    let ribbon_paddings_len = 12;
+    let medium_controls_line_len = medium_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + medium_group_actions_text.chars().count()
+        + medium_toggle_group_text.chars().count()
+        + medium_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    // short
+    let short_selected_panes_text = if common_modifier_text.is_empty() {
+        format!("{} SELECTED", grouped_pane_count)
+    } else {
+        format!("{} SELECTED |", grouped_pane_count)
+    };
+    let short_group_actions_text = format!("<{}>", &multiple_select_key);
+    let short_toggle_group_text = format!("<{}>", &pane_group_toggle_key);
+    let short_group_mark_toggle_text = format!("<{}>", &group_mark_toggle_key);
+    let color_emphasis_range_end = if common_modifier_text.is_empty() {
+        0
+    } else {
+        2
+    };
+    let ribbon_paddings_len = 12;
+    let short_controls_line_len = short_selected_panes_text.chars().count()
+        + 1
+        + common_modifier_text.chars().count()
+        + short_group_actions_text.chars().count()
+        + short_toggle_group_text.chars().count()
+        + short_group_mark_toggle_text.chars().count()
+        + ribbon_paddings_len
+        + 1; // 1 for the end padding
+
+    let (
+        selected_panes_text,
+        group_actions_text,
+        toggle_group_text,
+        group_mark_toggle_text,
+        controls_line_len,
+    ) = if max_len >= full_controls_line_len {
+        (
+            full_selected_panes_text,
+            full_group_actions_text,
+            full_toggle_group_text,
+            full_group_mark_toggle_text,
+            full_controls_line_len,
+        )
+    } else if max_len >= medium_controls_line_len {
+        (
+            medium_selected_panes_text,
+            medium_group_actions_text,
+            medium_toggle_group_text,
+            medium_group_mark_toggle_text,
+            medium_controls_line_len,
+        )
+    } else if max_len >= short_controls_line_len {
+        (
+            short_selected_panes_text,
+            short_group_actions_text,
+            short_toggle_group_text,
+            short_group_mark_toggle_text,
+            short_controls_line_len,
+        )
+    } else {
+        return None;
+    };
+    let selected_panes = serialize_text(
+        &Text::new(&selected_panes_text)
+            .color_range(
+                3,
+                ..selected_panes_text
+                    .chars()
+                    .count()
+                    .saturating_sub(color_emphasis_range_end),
+            )
+            .opaque(),
+    );
+    let group_actions_ribbon = serialize_ribbon(
+        &Text::new(&group_actions_text).color_range(0, 1..=multiple_select_key.chars().count()),
+    );
+    let toggle_group_ribbon = serialize_ribbon(
+        &Text::new(&toggle_group_text).color_range(0, 1..=pane_group_toggle_key.chars().count()),
+    );
+    let mut group_mark_toggle_ribbon = Text::new(&group_mark_toggle_text)
+        .color_range(0, 1..=group_mark_toggle_key.chars().count());
+    if currently_marking_group {
+        group_mark_toggle_ribbon = group_mark_toggle_ribbon.selected();
+    }
+    let group_mark_toggle_ribbon = serialize_ribbon(&group_mark_toggle_ribbon);
+    let controls_line = if common_modifiers.is_empty() {
+        format!(
+            "{} {}{}{}",
+            selected_panes, group_actions_ribbon, toggle_group_ribbon, group_mark_toggle_ribbon
+        )
+    } else {
+        let common_modifier =
+            serialize_text(&Text::new(&common_modifier_text).color_range(0, ..).opaque());
+        format!(
+            "{} {}{}{}{}",
+            selected_panes,
+            common_modifier,
+            group_actions_ribbon,
+            toggle_group_ribbon,
+            group_mark_toggle_ribbon
+        )
+    };
+    let remaining_space = max_len.saturating_sub(controls_line_len);
+    let mut padding = String::new();
+    let mut padding_len = 0;
+    for _ in 0..remaining_space {
+        padding.push_str(&ANSIStrings(&[superkey_prefix_style.paint(" ")]).to_string());
+        padding_len += 1;
+    }
+    Some(LinePart {
+        part: format!("{}{}", padding, controls_line),
+        len: controls_line_len + padding_len,
+    })
+}
+
 fn render_secondary_info(
     help: &ModeInfo,
     tab_info: Option<&TabInfo>,
@@ -1168,6 +1395,7 @@ fn add_keygroup_separator(help: &ModeInfo, max_len: usize) -> Option<LinePart> {
         bits.push(
             Style::new()
                 .fg(separator_color)
+                .on(bg_color)
                 .bold()
                 .paint(format!(" {} ", mode_help_text)),
         );
@@ -1330,6 +1558,7 @@ fn get_keys_and_hints(mi: &ModeInfo) -> Vec<(String, String, Vec<KeyWithModifier
         (s("Switch Location"), s("Move"), action_key_group(&km, &[
             &[Action::MovePane(Some(Dir::Left))], &[Action::MovePane(Some(Dir::Down))],
             &[Action::MovePane(Some(Dir::Up))], &[Action::MovePane(Some(Dir::Right))]])),
+        (s("When done"), s("Back"), to_basemode_key),
     ]} else if mi.mode == IM::Scroll { vec![
         (s("Enter search term"), s("Search"),
             action_key(&km, &[A::SwitchToMode(IM::EnterSearch), A::SearchInput(vec![0])])),
@@ -1516,6 +1745,25 @@ fn configuration_key(keymap: &[(KeyWithModifier, Vec<Action>)]) -> Vec<KeyWithMo
     }
 }
 
+fn multiple_select_key(keymap: &[(KeyWithModifier, Vec<Action>)]) -> Vec<KeyWithModifier> {
+    let mut matching = keymap.iter().find_map(|(key, acvec)| {
+        let has_match = acvec
+            .iter()
+            .find(|a| a.launches_plugin("zellij:multiple-select")) // TODO: make this an alias
+            .is_some();
+        if has_match {
+            Some(key.clone())
+        } else {
+            None
+        }
+    });
+    if let Some(matching) = matching.take() {
+        vec![matching]
+    } else {
+        vec![]
+    }
+}
+
 fn style_key_with_modifier(keyvec: &[KeyWithModifier], color_index: Option<usize>) -> LinePart {
     if keyvec.is_empty() {
         return LinePart::default();

example/config.kdl

@@ -138,6 +138,14 @@ keybinds {
         bind "Alt k" "Alt Up" { MoveFocus "Up"; }
         bind "Alt =" "Alt +" { Resize "Increase"; }
         bind "Alt -" { Resize "Decrease"; }
+        bind "Alt m" {
+            LaunchOrFocusPlugin "zellij:multiple-select" {
+                floating true
+                move_to_focused_tab true
+            }
+        }
+        bind "Alt p" { TogglePaneInGroup; }
+        bind "Alt Shift p" { ToggleGroupMarking; }
     }
     shared_except "normal" "locked" {
         bind "Enter" "Space" "Esc" { SwitchToMode "Normal"; }

xtask/src/main.rs

@@ -69,6 +69,10 @@ fn workspace_members() -> &'static Vec<WorkspaceMember> {
                 crate_name: "default-plugins/about",
                 build: true,
             },
+            WorkspaceMember {
+                crate_name: "default-plugins/multiple-select",
+                build: true,
+            },
             WorkspaceMember {
                 crate_name: "zellij-utils",
                 build: false,

zellij-server/src/background_jobs.rs

@@ -55,6 +55,7 @@ pub enum BackgroundJob {
         Vec<u8>,                  // body
         BTreeMap<String, String>, // context
     ),
+    HighlightPanesWithMessage(Vec<PaneId>, String),
     RenderToClients,
     Exit,
 }
@@ -76,12 +77,16 @@ impl From<&BackgroundJob> for BackgroundJobContext {
             BackgroundJob::WebRequest(..) => BackgroundJobContext::WebRequest,
             BackgroundJob::ReportPluginList(..) => BackgroundJobContext::ReportPluginList,
             BackgroundJob::RenderToClients => BackgroundJobContext::ReportPluginList,
+            BackgroundJob::HighlightPanesWithMessage(..) => {
+                BackgroundJobContext::HighlightPanesWithMessage
+            },
             BackgroundJob::Exit => BackgroundJobContext::Exit,
         }
     }
 }
 
-static FLASH_DURATION_MS: u64 = 1000;
+static LONG_FLASH_DURATION_MS: u64 = 1000;
+static FLASH_DURATION_MS: u64 = 400; // Doherty threshold
 static PLUGIN_ANIMATION_OFFSET_DURATION_MD: u64 = 500;
 static SESSION_READ_DURATION: u64 = 1000;
 static DEFAULT_SERIALIZATION_INTERVAL: u64 = 60000;
@@ -129,7 +134,7 @@ pub(crate) fn background_jobs_main(
                                 Some(text),
                             ),
                         );
-                        task::sleep(std::time::Duration::from_millis(FLASH_DURATION_MS)).await;
+                        task::sleep(std::time::Duration::from_millis(LONG_FLASH_DURATION_MS)).await;
                         let _ = senders.send_to_screen(
                             ScreenInstruction::ClearPaneFrameColorOverride(pane_ids),
                         );
@@ -411,6 +416,26 @@ pub(crate) fn background_jobs_main(
                     });
                 }
             },
+            BackgroundJob::HighlightPanesWithMessage(pane_ids, text) => {
+                if job_already_running(job, &mut running_jobs) {
+                    continue;
+                }
+                task::spawn({
+                    let senders = bus.senders.clone();
+                    async move {
+                        let _ = senders.send_to_screen(
+                            ScreenInstruction::AddHighlightPaneFrameColorOverride(
+                                pane_ids.clone(),
+                                Some(text),
+                            ),
+                        );
+                        task::sleep(std::time::Duration::from_millis(FLASH_DURATION_MS)).await;
+                        let _ = senders.send_to_screen(
+                            ScreenInstruction::ClearPaneFrameColorOverride(pane_ids),
+                        );
+                    }
+                });
+            },
             BackgroundJob::Exit => {
                 for loading_plugin in loading_plugins.values() {
                     loading_plugin.store(false, Ordering::SeqCst);
@@ -431,7 +456,9 @@ fn job_already_running(
 ) -> bool {
     match running_jobs.get_mut(&job) {
         Some(current_running_job_start_time) => {
-            if current_running_job_start_time.elapsed() > Duration::from_millis(FLASH_DURATION_MS) {
+            if current_running_job_start_time.elapsed()
+                > Duration::from_millis(LONG_FLASH_DURATION_MS)
+            {
                 *current_running_job_start_time = Instant::now();
                 false
             } else {

zellij-server/src/lib.rs

@@ -369,6 +369,10 @@ impl SessionMetaData {
                     hide_session_name: new_config.ui.pane_frames.hide_session_name,
                     stacked_resize: new_config.options.stacked_resize.unwrap_or(true),
                     default_editor: new_config.options.scrollback_editor.clone(),
+                    advanced_mouse_actions: new_config
+                        .options
+                        .advanced_mouse_actions
+                        .unwrap_or(true),
                 })
                 .unwrap();
             self.senders

zellij-server/src/panes/floating_panes/mod.rs

@@ -343,7 +343,12 @@ impl FloatingPanes {
         }
         Ok(())
     }
-    pub fn render(&mut self, output: &mut Output) -> Result<()> {
+    pub fn render(
+        &mut self,
+        output: &mut Output,
+        mouse_hover_pane_id: &HashMap<ClientId, PaneId>,
+        current_pane_group: HashMap<ClientId, Vec<PaneId>>,
+    ) -> Result<()> {
         let err_context = || "failed to render output";
         let connected_clients: Vec<ClientId> =
             { self.connected_clients.borrow().iter().copied().collect() };
@@ -393,6 +398,8 @@ impl FloatingPanes {
                 false,
                 false,
                 true,
+                mouse_hover_pane_id,
+                current_pane_group.clone(),
             );
             for client_id in &connected_clients {
                 let client_mode = self
@@ -1095,10 +1102,10 @@ impl FloatingPanes {
             Err(anyhow!("Pane not found"))
         }
     }
-    pub fn pane_info(&self) -> Vec<PaneInfo> {
+    pub fn pane_info(&self, current_pane_group: &HashMap<ClientId, Vec<PaneId>>) -> Vec<PaneInfo> {
         let mut pane_infos = vec![];
         for (pane_id, pane) in self.panes.iter() {
-            let mut pane_info_for_pane = pane_info_for_pane(pane_id, pane);
+            let mut pane_info_for_pane = pane_info_for_pane(pane_id, pane, current_pane_group);
             let is_focused = self.active_panes.pane_id_is_focused(pane_id);
             pane_info_for_pane.is_floating = true;
             pane_info_for_pane.is_suppressed = false;
@@ -1139,4 +1146,48 @@ impl FloatingPanes {
             pane.update_rounded_corners(rounded_corners);
         }
     }
+    pub fn next_selectable_pane_id_above(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let display_area = *self.display_area.borrow();
+        let viewport = *self.viewport.borrow();
+        let floating_pane_grid = FloatingPaneGrid::new(
+            &mut self.panes,
+            &mut self.desired_pane_positions,
+            display_area,
+            viewport,
+        );
+        floating_pane_grid.next_selectable_pane_id_above(&pane_id)
+    }
+    pub fn next_selectable_pane_id_below(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let display_area = *self.display_area.borrow();
+        let viewport = *self.viewport.borrow();
+        let floating_pane_grid = FloatingPaneGrid::new(
+            &mut self.panes,
+            &mut self.desired_pane_positions,
+            display_area,
+            viewport,
+        );
+        floating_pane_grid.next_selectable_pane_id_below(&pane_id)
+    }
+    pub fn next_selectable_pane_id_to_the_left(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let display_area = *self.display_area.borrow();
+        let viewport = *self.viewport.borrow();
+        let floating_pane_grid = FloatingPaneGrid::new(
+            &mut self.panes,
+            &mut self.desired_pane_positions,
+            display_area,
+            viewport,
+        );
+        floating_pane_grid.next_selectable_pane_id_to_the_left(&pane_id)
+    }
+    pub fn next_selectable_pane_id_to_the_right(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let display_area = *self.display_area.borrow();
+        let viewport = *self.viewport.borrow();
+        let floating_pane_grid = FloatingPaneGrid::new(
+            &mut self.panes,
+            &mut self.desired_pane_positions,
+            display_area,
+            viewport,
+        );
+        floating_pane_grid.next_selectable_pane_id_to_the_right(&pane_id)
+    }
 }

zellij-server/src/panes/plugin_pane.rs

@@ -646,7 +646,16 @@ impl Pane for PluginPane {
     fn add_red_pane_frame_color_override(&mut self, error_text: Option<String>) {
         self.pane_frame_color_override = Some((self.style.colors.exit_code_error.base, error_text));
     }
-    fn clear_pane_frame_color_override(&mut self) {
+    fn add_highlight_pane_frame_color_override(
+        &mut self,
+        text: Option<String>,
+        _client_id: Option<ClientId>,
+    ) {
+        // TODO: if we have a client_id, we should only highlight the frame for this client
+        self.pane_frame_color_override = Some((self.style.colors.frame_highlight.base, text));
+    }
+    fn clear_pane_frame_color_override(&mut self, _client_id: Option<ClientId>) {
+        // TODO: if we have a client_id, we should only clear the highlight for this client
         self.pane_frame_color_override = None;
     }
     fn frame_color_override(&self) -> Option<PaletteColor> {

zellij-server/src/panes/terminal_pane.rs

@@ -742,7 +742,16 @@ impl Pane for TerminalPane {
     fn add_red_pane_frame_color_override(&mut self, error_text: Option<String>) {
         self.pane_frame_color_override = Some((self.style.colors.exit_code_error.base, error_text));
     }
-    fn clear_pane_frame_color_override(&mut self) {
+    fn add_highlight_pane_frame_color_override(
+        &mut self,
+        text: Option<String>,
+        _client_id: Option<ClientId>,
+    ) {
+        // TODO: if we have a client_id, we should only highlight the frame for this client
+        self.pane_frame_color_override = Some((self.style.colors.frame_highlight.base, text));
+    }
+    fn clear_pane_frame_color_override(&mut self, _client_id: Option<ClientId>) {
+        // TODO: if we have a client_id, we should only clear the highlight for this client
         self.pane_frame_color_override = None;
     }
     fn frame_color_override(&self) -> Option<PaletteColor> {

zellij-server/src/panes/tiled_panes/mod.rs

@@ -200,6 +200,15 @@ impl TiledPanes {
             .is_some();
         has_room_for_new_pane || pane_grid.has_room_for_new_stacked_pane() || self.panes.is_empty()
     }
+    pub fn room_left_in_stack_of_pane_id(&mut self, pane_id: &PaneId) -> Option<usize> {
+        let mut pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        pane_grid.room_left_in_stack_of_pane_id(pane_id)
+    }
 
     pub fn assign_geom_for_pane_with_run(&mut self, run: Option<Run>) {
         // here we're removing the first pane we find with this run instruction and re-adding it so
@@ -226,6 +235,26 @@ impl TiledPanes {
             }
         }
     }
+    pub fn add_pane_to_stack(&mut self, pane_id_in_stack: &PaneId, mut pane: Box<dyn Pane>) {
+        let mut pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        match pane_grid.make_room_in_stack_of_pane_id_for_pane(pane_id_in_stack) {
+            Ok(new_pane_geom) => {
+                pane.set_geom(new_pane_geom);
+                self.panes.insert(pane.pid(), pane);
+                self.set_force_render(); // TODO: why do we need this?
+                return;
+            },
+            Err(_e) => {
+                let should_relayout = false;
+                return self.add_pane_without_stacked_resize(pane.pid(), pane, should_relayout);
+            },
+        }
+    }
     fn add_pane(
         &mut self,
         pane_id: PaneId,
@@ -658,6 +687,18 @@ impl TiledPanes {
         self.set_force_render();
         self.reapply_pane_frames();
     }
+    pub fn pane_ids_in_stack_of_pane_id(&mut self, pane_id: &PaneId) -> Vec<PaneId> {
+        if let Some(stack_id) = self
+            .panes
+            .get(pane_id)
+            .and_then(|p| p.position_and_size().stacked)
+        {
+            StackedPanes::new_from_btreemap(&mut self.panes, &self.panes_to_hide)
+                .pane_ids_in_stack(stack_id)
+        } else {
+            vec![]
+        }
+    }
     pub fn focus_pane_for_all_clients_in_stack(&mut self, pane_id: PaneId, stack_id: usize) {
         let connected_clients: Vec<ClientId> =
             self.connected_clients.borrow().iter().copied().collect();
@@ -880,7 +921,13 @@ impl TiledPanes {
     pub fn has_panes(&self) -> bool {
         !self.panes.is_empty()
     }
-    pub fn render(&mut self, output: &mut Output, floating_panes_are_visible: bool) -> Result<()> {
+    pub fn render(
+        &mut self,
+        output: &mut Output,
+        floating_panes_are_visible: bool,
+        mouse_hover_pane_id: &HashMap<ClientId, PaneId>,
+        current_pane_group: HashMap<ClientId, Vec<PaneId>>,
+    ) -> Result<()> {
         let err_context = || "failed to render tiled panes";
 
         let connected_clients: Vec<ClientId> =
@@ -930,6 +977,8 @@ impl TiledPanes {
                     pane_is_stacked_under,
                     pane_is_stacked_over,
                     should_draw_pane_frames,
+                    &mouse_hover_pane_id,
+                    current_pane_group.clone(),
                 );
                 for client_id in &connected_clients {
                     let client_mode = self
@@ -1716,7 +1765,7 @@ impl TiledPanes {
                     *self.viewport.borrow(),
                 );
                 let next_index = pane_grid
-                    .next_selectable_pane_id_below(&active_pane_id)
+                    .next_selectable_pane_id_below(&active_pane_id, false)
                     .or_else(|| pane_grid.progress_stack_down_if_in_stack(&active_pane_id));
                 match next_index {
                     Some(p) => {
@@ -1767,7 +1816,7 @@ impl TiledPanes {
                     *self.viewport.borrow(),
                 );
                 let next_index = pane_grid
-                    .next_selectable_pane_id_above(&active_pane_id)
+                    .next_selectable_pane_id_above(&active_pane_id, false)
                     .or_else(|| pane_grid.progress_stack_up_if_in_stack(&active_pane_id));
                 match next_index {
                     Some(p) => {
@@ -1972,7 +2021,7 @@ impl TiledPanes {
             *self.viewport.borrow(),
         );
         let next_index = pane_grid
-            .next_selectable_pane_id_below(&pane_id)
+            .next_selectable_pane_id_below(&pane_id, false)
             .or_else(|| pane_grid.progress_stack_down_if_in_stack(&pane_id));
         if let Some(p) = next_index {
             let current_position = self.panes.get(&pane_id).unwrap();
@@ -2127,7 +2176,7 @@ impl TiledPanes {
             *self.viewport.borrow(),
         );
         let next_index = pane_grid
-            .next_selectable_pane_id_above(&pane_id)
+            .next_selectable_pane_id_above(&pane_id, false)
             .or_else(|| pane_grid.progress_stack_up_if_in_stack(&pane_id));
         if let Some(p) = next_index {
             let current_position = self.panes.get(&pane_id).unwrap();
@@ -2443,10 +2492,10 @@ impl TiledPanes {
             .find(|(_id, pane)| run_plugin_or_alias.is_equivalent_to_run(pane.invoked_with()))
             .map(|(id, _)| *id)
     }
-    pub fn pane_info(&self) -> Vec<PaneInfo> {
+    pub fn pane_info(&self, current_pane_group: &HashMap<ClientId, Vec<PaneId>>) -> Vec<PaneInfo> {
         let mut pane_infos = vec![];
         for (pane_id, pane) in self.panes.iter() {
-            let mut pane_info_for_pane = pane_info_for_pane(pane_id, pane);
+            let mut pane_info_for_pane = pane_info_for_pane(pane_id, pane, &current_pane_group);
             let is_focused = self.active_panes.pane_id_is_focused(pane_id);
             pane_info_for_pane.is_floating = false;
             pane_info_for_pane.is_suppressed = false;
@@ -2495,6 +2544,44 @@ impl TiledPanes {
         StackedPanes::new_from_btreemap(&mut self.panes, &self.panes_to_hide)
             .stacked_pane_ids_under_and_over_flexible_panes()
     }
+    pub fn next_selectable_pane_id_above(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        let include_panes_in_stack = true;
+        pane_grid.next_selectable_pane_id_above(&pane_id, include_panes_in_stack)
+    }
+    pub fn next_selectable_pane_id_below(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        let include_panes_in_stack = true;
+        pane_grid.next_selectable_pane_id_below(&pane_id, include_panes_in_stack)
+    }
+    pub fn next_selectable_pane_id_to_the_left(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        pane_grid.next_selectable_pane_id_to_the_left(&pane_id)
+    }
+    pub fn next_selectable_pane_id_to_the_right(&mut self, pane_id: &PaneId) -> Option<PaneId> {
+        let pane_grid = TiledPaneGrid::new(
+            &mut self.panes,
+            &self.panes_to_hide,
+            *self.display_area.borrow(),
+            *self.viewport.borrow(),
+        );
+        pane_grid.next_selectable_pane_id_to_the_right(&pane_id)
+    }
 }
 
 #[allow(clippy::borrowed_box)]

zellij-server/src/panes/tiled_panes/stacked_panes.rs

@@ -500,6 +500,20 @@ impl<'a> StackedPanes<'a> {
         }
         Err(anyhow!("Not enough room for another pane!"))
     }
+    pub fn room_left_in_stack_of_pane_id(&self, pane_id: &PaneId) -> Option<usize> {
+        // if the pane is stacked, returns the number of panes possible to add to this stack
+        let Ok(stack) = self.positions_in_stack(pane_id) else {
+            return None;
+        };
+        stack.iter().find_map(|(_p_id, p)| {
+            if !p.rows.is_fixed() {
+                // this is the flexible pane
+                Some(p.rows.as_usize().saturating_sub(MIN_TERMINAL_HEIGHT))
+            } else {
+                None
+            }
+        })
+    }
     pub fn new_stack(&self, root_pane_id: PaneId, pane_count_in_stack: usize) -> Vec<PaneGeom> {
         let mut stacked_geoms = vec![];
         let panes = self.panes.borrow();

zellij-server/src/panes/tiled_panes/tiled_pane_grid.rs

@@ -1009,7 +1009,11 @@ impl<'a> TiledPaneGrid<'a> {
             None => None,
         }
     }
-    pub fn next_selectable_pane_id_below(&self, current_pane_id: &PaneId) -> Option<PaneId> {
+    pub fn next_selectable_pane_id_below(
+        &self,
+        current_pane_id: &PaneId,
+        include_panes_in_stack: bool,
+    ) -> Option<PaneId> {
         let panes = self.panes.borrow();
         let current_pane = panes.get(current_pane_id)?;
         let panes: Vec<(PaneId, &&mut Box<dyn Pane>)> = panes
@@ -1021,9 +1025,14 @@ impl<'a> TiledPaneGrid<'a> {
             .iter()
             .enumerate()
             .filter(|(_, (_, c))| {
+                if include_panes_in_stack {
+                    c.is_directly_below(Box::as_ref(current_pane))
+                        && c.vertically_overlaps_with(Box::as_ref(current_pane))
+                } else {
                     c.is_directly_below(Box::as_ref(current_pane))
                         && c.vertically_overlaps_with(Box::as_ref(current_pane))
                         && !c.current_geom().is_stacked()
+                }
             })
             .max_by_key(|(_, (_, c))| c.active_at())
             .map(|(_, (pid, _))| pid)
@@ -1074,7 +1083,11 @@ impl<'a> TiledPaneGrid<'a> {
             .copied();
         next_index
     }
-    pub fn next_selectable_pane_id_above(&self, current_pane_id: &PaneId) -> Option<PaneId> {
+    pub fn next_selectable_pane_id_above(
+        &self,
+        current_pane_id: &PaneId,
+        include_panes_in_stack: bool,
+    ) -> Option<PaneId> {
         let panes = self.panes.borrow();
         let current_pane = panes.get(current_pane_id)?;
         let panes: Vec<(PaneId, &&mut Box<dyn Pane>)> = panes
@@ -1086,9 +1099,14 @@ impl<'a> TiledPaneGrid<'a> {
             .iter()
             .enumerate()
             .filter(|(_, (_, c))| {
+                if include_panes_in_stack {
+                    c.is_directly_above(Box::as_ref(current_pane))
+                        && c.vertically_overlaps_with(Box::as_ref(current_pane))
+                } else {
                     c.is_directly_above(Box::as_ref(current_pane))
                         && c.vertically_overlaps_with(Box::as_ref(current_pane))
                         && !c.current_geom().is_stacked()
+                }
             })
             .max_by_key(|(_, (_, c))| c.active_at())
             .map(|(_, (pid, _))| pid)
@@ -1413,6 +1431,9 @@ impl<'a> TiledPaneGrid<'a> {
             .iter()
             .any(|(_p_id, p)| p.current_geom().rows.as_usize() > MIN_TERMINAL_HEIGHT)
     }
+    pub fn room_left_in_stack_of_pane_id(&mut self, pane_id: &PaneId) -> Option<usize> {
+        StackedPanes::new(self.panes.clone()).room_left_in_stack_of_pane_id(pane_id)
+    }
     pub fn make_room_in_stack_for_pane(&mut self) -> Result<PaneGeom> {
         StackedPanes::new(self.panes.clone()).make_room_for_new_pane()
     }

zellij-server/src/panes/tiled_panes/unit/stacked_panes_tests.rs

@@ -1218,7 +1218,7 @@ impl Pane for MockPane {
     fn add_red_pane_frame_color_override(&mut self, _error_text: Option<String>) {
         unimplemented!()
     }
-    fn clear_pane_frame_color_override(&mut self) {
+    fn clear_pane_frame_color_override(&mut self, _client_id: Option<ClientId>) {
         unimplemented!()
     }
     fn frame_color_override(&self) -> Option<PaletteColor> {

zellij-server/src/plugins/plugin_map.rs

@@ -50,18 +50,21 @@ impl PluginMap {
     pub fn remove_plugins(
         &mut self,
         pid: PluginId,
-    ) -> Vec<(
+    ) -> HashMap<
+        (PluginId, ClientId),
+        (
             Arc<Mutex<RunningPlugin>>,
             Arc<Mutex<Subscriptions>>,
             HashMap<String, Sender<MessageToWorker>>,
-    )> {
+        ),
-        let mut removed = vec![];
+    > {
+        let mut removed = HashMap::new();
         let ids_in_plugin_map: Vec<(PluginId, ClientId)> =
             self.plugin_assets.keys().copied().collect();
         for (plugin_id, client_id) in ids_in_plugin_map {
             if pid == plugin_id {
                 if let Some(plugin_asset) = self.plugin_assets.remove(&(plugin_id, client_id)) {
-                    removed.push(plugin_asset);
+                    removed.insert((plugin_id, client_id), plugin_asset);
                 }
             }
         }

zellij-server/src/plugins/unit/plugin_tests.rs

@@ -8622,3 +8622,74 @@ pub fn list_clients_plugin_command() {
         .unwrap();
     assert_snapshot!(format!("{:#?}", list_clients_instruction));
 }
+
+#[test]
+#[ignore]
+pub fn before_close_plugin_event() {
+    let temp_folder = tempdir().unwrap(); // placed explicitly in the test scope because its
+                                          // destructor removes the directory
+    let plugin_host_folder = PathBuf::from(temp_folder.path());
+    let cache_path = plugin_host_folder.join("permissions_test.kdl");
+    let (plugin_thread_sender, screen_receiver, teardown) =
+        create_plugin_thread(Some(plugin_host_folder));
+    let plugin_should_float = Some(false);
+    let plugin_title = Some("test_plugin".to_owned());
+    let run_plugin = RunPluginOrAlias::RunPlugin(RunPlugin {
+        _allow_exec_host_cmd: false,
+        location: RunPluginLocation::File(PathBuf::from(&*PLUGIN_FIXTURE)),
+        configuration: Default::default(),
+        ..Default::default()
+    });
+    let tab_index = 1;
+    let client_id = 1;
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let received_screen_instructions = Arc::new(Mutex::new(vec![]));
+    let screen_thread = grant_permissions_and_log_actions_in_thread!(
+        received_screen_instructions,
+        ScreenInstruction::HighlightAndUnhighlightPanes,
+        screen_receiver,
+        1,
+        &PermissionType::ChangeApplicationState,
+        cache_path,
+        plugin_thread_sender,
+        client_id
+    );
+
+    let _ = plugin_thread_sender.send(PluginInstruction::AddClient(client_id));
+    let _ = plugin_thread_sender.send(PluginInstruction::Load(
+        plugin_should_float,
+        false,
+        plugin_title,
+        run_plugin,
+        Some(tab_index),
+        None,
+        client_id,
+        size,
+        None,
+        false,
+    ));
+    std::thread::sleep(std::time::Duration::from_millis(5000));
+    // here we send an unload to plugin id 0 (the first plugin id, presumably this plugin)
+    // so that its BeforeClose Event will be triggered and it will send a
+    // HighlightAndUnhighlightPanes
+    // instruction which we can assert below
+    let _ = plugin_thread_sender.send(PluginInstruction::Unload(0));
+    screen_thread.join().unwrap(); // this might take a while if the cache is cold
+    teardown();
+    let sent_instruction = received_screen_instructions
+        .lock()
+        .unwrap()
+        .iter()
+        .find_map(|i| {
+            if let ScreenInstruction::HighlightAndUnhighlightPanes(..) = i {
+                Some(i.clone())
+            } else {
+                None
+            }
+        })
+        .unwrap();
+    assert_snapshot!(format!("{:#?}", sent_instruction));
+}

zellij-server/src/plugins/unit/snapshots/zellij_server__plugins__plugin_tests__before_close_plugin_event.snap

@@ -0,0 +1,17 @@
+---
+source: zellij-server/src/plugins/./unit/plugin_tests.rs
+expression: "format!(\"{:#?}\", sent_instruction)"
+---
+HighlightAndUnhighlightPanes(
+    [
+        Terminal(
+            1,
+        ),
+    ],
+    [
+        Plugin(
+            1,
+        ),
+    ],
+    1,
+)

zellij-server/src/plugins/unit/snapshots/zellij_server__plugins__plugin_tests__switch_to_mode_plugin_command.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-server/src/plugins/./unit/plugin_tests.rs
-assertion_line: 1143
 expression: "format!(\"{:#?}\", switch_to_mode_event)"
 ---
 Some(
@@ -222,10 +221,10 @@ Some(
                             154,
                         ),
                         emphasis_0: EightBit(
-                            154,
+                            201,
                         ),
                         emphasis_1: EightBit(
-                            154,
+                            99,
                         ),
                         emphasis_2: EightBit(
                             154,
@@ -318,6 +317,7 @@ Some(
             ),
             editor: None,
             shell: None,
+            currently_marking_pane_group: None,
         },
         1,
     ),

zellij-server/src/plugins/wasm_bridge.rs

@@ -318,16 +318,45 @@ impl WasmBridge {
     pub fn unload_plugin(&mut self, pid: PluginId) -> Result<()> {
         info!("Bye from plugin {}", &pid);
         let mut plugin_map = self.plugin_map.lock().unwrap();
-        for (running_plugin, _, workers) in plugin_map.remove_plugins(pid) {
+        for ((plugin_id, client_id), (running_plugin, subscriptions, workers)) in
+            plugin_map.remove_plugins(pid)
+        {
             for (_worker_name, worker_sender) in workers {
                 drop(worker_sender.send(MessageToWorker::Exit));
             }
+            let subscriptions = subscriptions.lock().unwrap();
+            if subscriptions.contains(&EventType::BeforeClose) {
+                let mut running_plugin = running_plugin.lock().unwrap();
+                match apply_before_close_event_to_plugin(
+                    pid,
+                    client_id,
+                    &mut running_plugin,
+                    self.senders.clone(),
+                ) {
+                    Ok(()) => {},
+                    Err(e) => {
+                        log::error!("{:?}", e);
+
+                        // https://stackoverflow.com/questions/66450942/in-rust-is-there-a-way-to-make-literal-newlines-in-r-using-windows-c
+                        let stringified_error = format!("{:?}", e).replace("\n", "\n\r");
+
+                        handle_plugin_crash(plugin_id, stringified_error, self.senders.clone());
+                    },
+                }
+                let cache_dir = running_plugin.store.data().plugin_own_data_dir.clone();
+                if let Err(e) = std::fs::remove_dir_all(cache_dir) {
+                    log::error!("Failed to remove cache dir for plugin: {:?}", e);
+                }
+            } else {
+                // this is duplicated because of locking/unlocking order between running_plugin and
+                // subscriptions
                 let running_plugin = running_plugin.lock().unwrap();
                 let cache_dir = running_plugin.store.data().plugin_own_data_dir.clone();
                 if let Err(e) = std::fs::remove_dir_all(cache_dir) {
                     log::error!("Failed to remove cache dir for plugin: {:?}", e);
                 }
             }
+        }
         self.cached_plugin_map.clear();
         let mut pipes_to_unblock = self.pending_pipes.unload_plugin(&pid);
         for pipe_name in pipes_to_unblock.drain(..) {
@@ -1651,3 +1680,36 @@ pub fn handle_plugin_crash(plugin_id: PluginId, message: String, senders: Thread
         loading_indication,
     ));
 }
+
+pub fn apply_before_close_event_to_plugin(
+    plugin_id: PluginId,
+    client_id: ClientId,
+    running_plugin: &mut RunningPlugin,
+    senders: ThreadSenders,
+) -> Result<()> {
+    let instance = &running_plugin.instance;
+
+    let err_context = || format!("Failed to apply event to plugin {plugin_id}");
+    let event = Event::BeforeClose;
+    let protobuf_event: ProtobufEvent = event
+        .clone()
+        .try_into()
+        .map_err(|e| anyhow!("Failed to convert to protobuf: {:?}", e))?;
+    let update = instance
+        .get_typed_func::<(), i32>(&mut running_plugin.store, "update")
+        .with_context(err_context)?;
+    wasi_write_object(running_plugin.store.data(), &protobuf_event.encode_to_vec())
+        .with_context(err_context)?;
+    let _should_render = update
+        .call(&mut running_plugin.store, ())
+        .with_context(err_context)?;
+    let pipes_to_block_or_unblock = pipes_to_block_or_unblock(running_plugin, None);
+    let plugin_render_asset =
+        PluginRenderAsset::new(plugin_id, client_id, vec![]).with_pipes(pipes_to_block_or_unblock);
+    let _ = senders
+        .send_to_plugin(PluginInstruction::UnblockCliPipes(vec![
+            plugin_render_asset,
+        ]))
+        .context("failed to unblock input pipe");
+    Ok(())
+}

zellij-server/src/plugins/zellij_exports.rs

@@ -431,6 +431,30 @@ fn host_run_plugin_command(caller: Caller<'_, PluginEnv>) {
                         close_plugin_after_replace,
                         context,
                     ),
+                    PluginCommand::GroupAndUngroupPanes(panes_to_group, panes_to_ungroup) => {
+                        group_and_ungroup_panes(
+                            env,
+                            panes_to_group.into_iter().map(|p| p.into()).collect(),
+                            panes_to_ungroup.into_iter().map(|p| p.into()).collect(),
+                        )
+                    },
+                    PluginCommand::HighlightAndUnhighlightPanes(
+                        panes_to_highlight,
+                        panes_to_unhighlight,
+                    ) => highlight_and_unhighlight_panes(
+                        env,
+                        panes_to_highlight.into_iter().map(|p| p.into()).collect(),
+                        panes_to_unhighlight.into_iter().map(|p| p.into()).collect(),
+                    ),
+                    PluginCommand::CloseMultiplePanes(pane_ids) => {
+                        close_multiple_panes(env, pane_ids.into_iter().map(|p| p.into()).collect())
+                    },
+                    PluginCommand::FloatMultiplePanes(pane_ids) => {
+                        float_multiple_panes(env, pane_ids.into_iter().map(|p| p.into()).collect())
+                    },
+                    PluginCommand::EmbedMultiplePanes(pane_ids) => {
+                        embed_multiple_panes(env, pane_ids.into_iter().map(|p| p.into()).collect())
+                    },
                 },
                 (PermissionStatus::Denied, permission) => {
                     log::error!(
@@ -547,6 +571,7 @@ fn get_plugin_ids(env: &PluginEnv) {
         plugin_id: env.plugin_id,
         zellij_pid: process::id(),
         initial_cwd: env.plugin_cwd.clone(),
+        client_id: env.client_id,
     };
     ProtobufPluginIds::try_from(ids)
         .map_err(|e| anyhow!("Failed to serialized plugin ids: {}", e))
@@ -1864,7 +1889,7 @@ fn set_floating_pane_pinned(env: &PluginEnv, pane_id: PaneId, should_be_pinned:
 fn stack_panes(env: &PluginEnv, pane_ids: Vec<PaneId>) {
     let _ = env
         .senders
-        .send_to_screen(ScreenInstruction::StackPanes(pane_ids));
+        .send_to_screen(ScreenInstruction::StackPanes(pane_ids, env.client_id));
 }
 
 fn change_floating_panes_coordinates(
@@ -2147,6 +2172,65 @@ fn load_new_plugin(
     }
 }
 
+fn group_and_ungroup_panes(
+    env: &PluginEnv,
+    panes_to_group: Vec<PaneId>,
+    panes_to_ungroup: Vec<PaneId>,
+) {
+    let _ = env
+        .senders
+        .send_to_screen(ScreenInstruction::GroupAndUngroupPanes(
+            panes_to_group,
+            panes_to_ungroup,
+            env.client_id,
+        ));
+}
+
+fn highlight_and_unhighlight_panes(
+    env: &PluginEnv,
+    panes_to_highlight: Vec<PaneId>,
+    panes_to_unhighlight: Vec<PaneId>,
+) {
+    let _ = env
+        .senders
+        .send_to_screen(ScreenInstruction::HighlightAndUnhighlightPanes(
+            panes_to_highlight,
+            panes_to_unhighlight,
+            env.client_id,
+        ));
+}
+
+fn close_multiple_panes(env: &PluginEnv, pane_ids: Vec<PaneId>) {
+    for pane_id in pane_ids {
+        match pane_id {
+            PaneId::Terminal(terminal_pane_id) => {
+                close_terminal_pane(env, terminal_pane_id);
+            },
+            PaneId::Plugin(plugin_pane_id) => {
+                close_plugin_pane(env, plugin_pane_id);
+            },
+        }
+    }
+}
+
+fn float_multiple_panes(env: &PluginEnv, pane_ids: Vec<PaneId>) {
+    let _ = env
+        .senders
+        .send_to_screen(ScreenInstruction::FloatMultiplePanes(
+            pane_ids,
+            env.client_id,
+        ));
+}
+
+fn embed_multiple_panes(env: &PluginEnv, pane_ids: Vec<PaneId>) {
+    let _ = env
+        .senders
+        .send_to_screen(ScreenInstruction::EmbedMultiplePanes(
+            pane_ids,
+            env.client_id,
+        ));
+}
+
 // Custom panic handler for plugins.
 //
 // This is called when a panic occurs in a plugin. Since most panics will likely originate in the
@@ -2308,6 +2392,11 @@ fn check_command_permission(
         | PluginCommand::SetFloatingPanePinned(..)
         | PluginCommand::StackPanes(..)
         | PluginCommand::ChangeFloatingPanesCoordinates(..)
+        | PluginCommand::GroupAndUngroupPanes(..)
+        | PluginCommand::HighlightAndUnhighlightPanes(..)
+        | PluginCommand::CloseMultiplePanes(..)
+        | PluginCommand::FloatMultiplePanes(..)
+        | PluginCommand::EmbedMultiplePanes(..)
         | PluginCommand::KillSessions(..) => PermissionType::ChangeApplicationState,
         PluginCommand::UnblockCliPipeInput(..)
         | PluginCommand::BlockCliPipeInput(..)

zellij-server/src/route.rs

@@ -938,6 +938,7 @@ pub(crate) fn route_action(
             senders
                 .send_to_screen(ScreenInstruction::StackPanes(
                     pane_ids_to_stack.iter().map(|p| PaneId::from(*p)).collect(),
+                    client_id,
                 ))
                 .with_context(err_context)?;
         },
@@ -949,6 +950,16 @@ pub(crate) fn route_action(
                 )]))
                 .with_context(err_context)?;
         },
+        Action::TogglePaneInGroup => {
+            senders
+                .send_to_screen(ScreenInstruction::TogglePaneInGroup(client_id))
+                .with_context(err_context)?;
+        },
+        Action::ToggleGroupMarking => {
+            senders
+                .send_to_screen(ScreenInstruction::ToggleGroupMarking(client_id))
+                .with_context(err_context)?;
+        },
     }
     Ok(should_break)
 }

zellij-server/src/screen.rs

@@ -371,6 +371,7 @@ pub enum ScreenInstruction {
         hide_session_name: bool,
         stacked_resize: bool,
         default_editor: Option<PathBuf>,
+        advanced_mouse_actions: bool,
     },
     RerunCommandPane(u32), // u32 - terminal pane id
     ResizePaneWithId(ResizeStrategy, PaneId),
@@ -404,8 +405,16 @@ pub enum ScreenInstruction {
     ListClientsToPlugin(PluginId, ClientId),
     TogglePanePinned(ClientId),
     SetFloatingPanePinned(PaneId, bool),
-    StackPanes(Vec<PaneId>),
+    StackPanes(Vec<PaneId>, ClientId),
     ChangeFloatingPanesCoordinates(Vec<(PaneId, FloatingPaneCoordinates)>),
+    AddHighlightPaneFrameColorOverride(Vec<PaneId>, Option<String>), // Option<String> => optional
+    // message
+    GroupAndUngroupPanes(Vec<PaneId>, Vec<PaneId>, ClientId), // panes_to_group, panes_to_ungroup
+    HighlightAndUnhighlightPanes(Vec<PaneId>, Vec<PaneId>, ClientId), // panes_to_highlight, panes_to_unhighlight
+    FloatMultiplePanes(Vec<PaneId>, ClientId),
+    EmbedMultiplePanes(Vec<PaneId>, ClientId),
+    TogglePaneInGroup(ClientId),
+    ToggleGroupMarking(ClientId),
 }
 
 impl From<&ScreenInstruction> for ScreenContext {
@@ -616,6 +625,17 @@ impl From<&ScreenInstruction> for ScreenContext {
             ScreenInstruction::ChangeFloatingPanesCoordinates(..) => {
                 ScreenContext::ChangeFloatingPanesCoordinates
             },
+            ScreenInstruction::AddHighlightPaneFrameColorOverride(..) => {
+                ScreenContext::AddHighlightPaneFrameColorOverride
+            },
+            ScreenInstruction::GroupAndUngroupPanes(..) => ScreenContext::GroupAndUngroupPanes,
+            ScreenInstruction::HighlightAndUnhighlightPanes(..) => {
+                ScreenContext::HighlightAndUnhighlightPanes
+            },
+            ScreenInstruction::FloatMultiplePanes(..) => ScreenContext::FloatMultiplePanes,
+            ScreenInstruction::EmbedMultiplePanes(..) => ScreenContext::EmbedMultiplePanes,
+            ScreenInstruction::TogglePaneInGroup(..) => ScreenContext::TogglePaneInGroup,
+            ScreenInstruction::ToggleGroupMarking(..) => ScreenContext::ToggleGroupMarking,
         }
     }
 }
@@ -697,6 +717,9 @@ pub(crate) struct Screen {
     default_layout_name: Option<String>,
     explicitly_disable_kitty_keyboard_protocol: bool,
     default_editor: Option<PathBuf>,
+    current_pane_group: Rc<RefCell<HashMap<ClientId, Vec<PaneId>>>>,
+    advanced_mouse_actions: bool,
+    currently_marking_pane_group: Rc<RefCell<HashMap<ClientId, bool>>>,
 }
 
 impl Screen {
@@ -723,6 +746,7 @@ impl Screen {
         explicitly_disable_kitty_keyboard_protocol: bool,
         stacked_resize: bool,
         default_editor: Option<PathBuf>,
+        advanced_mouse_actions: bool,
     ) -> Self {
         let session_name = mode_info.session_name.clone().unwrap_or_default();
         let session_info = SessionInfo::new(session_name.clone());
@@ -766,6 +790,9 @@ impl Screen {
             layout_dir,
             explicitly_disable_kitty_keyboard_protocol,
             default_editor,
+            current_pane_group: Rc::new(RefCell::new(HashMap::new())),
+            currently_marking_pane_group: Rc::new(RefCell::new(HashMap::new())),
+            advanced_mouse_actions,
         }
     }
 
@@ -1257,6 +1284,10 @@ impl Screen {
         &mut self.tabs
     }
 
+    pub fn get_tabs(&self) -> &BTreeMap<usize, Tab> {
+        &self.tabs
+    }
+
     /// Returns an immutable reference to this [`Screen`]'s active [`Tab`].
     pub fn get_active_tab(&self, client_id: ClientId) -> Result<&Tab> {
         match self.active_tab_indices.get(&client_id) {
@@ -1366,6 +1397,9 @@ impl Screen {
             self.styled_underlines,
             self.explicitly_disable_kitty_keyboard_protocol,
             self.default_editor.clone(),
+            self.current_pane_group.clone(),
+            self.currently_marking_pane_group.clone(),
+            self.advanced_mouse_actions,
         );
         for (client_id, mode_info) in &self.mode_info {
             tab.change_mode_info(mode_info.clone(), *client_id);
@@ -2474,6 +2508,7 @@ impl Screen {
         hide_session_name: bool,
         stacked_resize: bool,
         default_editor: Option<PathBuf>,
+        advanced_mouse_actions: bool,
         client_id: ClientId,
     ) -> Result<()> {
         let should_support_arrow_fonts = !simplified_ui;
@@ -2488,6 +2523,7 @@ impl Screen {
         self.copy_options.command = copy_command.clone();
         self.copy_options.copy_on_select = copy_on_select;
         self.draw_pane_frames = pane_frames;
+        self.advanced_mouse_actions = advanced_mouse_actions;
         self.default_mode_info
             .update_arrow_fonts(should_support_arrow_fonts);
         self.default_mode_info
@@ -2507,6 +2543,7 @@ impl Screen {
             tab.update_copy_options(&self.copy_options);
             tab.set_pane_frames(pane_frames);
             tab.update_arrow_fonts(should_support_arrow_fonts);
+            tab.update_advanced_mouse_actions(advanced_mouse_actions);
         }
 
         // client specific configuration
@@ -2559,10 +2596,11 @@ impl Screen {
             );
         }
     }
-    pub fn stack_panes(&mut self, mut pane_ids_to_stack: Vec<PaneId>) {
+    pub fn stack_panes(&mut self, mut pane_ids_to_stack: Vec<PaneId>) -> Option<PaneId> {
+        // if successful, returns the pane id of the root pane
         if pane_ids_to_stack.is_empty() {
             log::error!("Got an empty list of pane_ids to stack");
-            return;
+            return None;
         }
         let stack_size = pane_ids_to_stack.len();
         let root_pane_id = pane_ids_to_stack.remove(0);
@@ -2579,19 +2617,20 @@ impl Screen {
             .copied()
         else {
             log::error!("Failed to find tab for root_pane_id: {:?}", root_pane_id);
-            return;
+            return None;
         };
+
+        let mut panes_to_stack = vec![];
         let target_tab_has_room_for_stack = self
             .tabs
-            .get(&root_tab_id)
+            .get_mut(&root_tab_id)
             .map(|t| t.has_room_for_stack(root_pane_id, stack_size))
             .unwrap_or(false);
         if !target_tab_has_room_for_stack {
             log::error!("No room for stack with root pane id: {:?}", root_pane_id);
-            return;
+            return None;
         }
 
-        let mut panes_to_stack = vec![];
         for (tab_id, tab) in self.tabs.iter_mut() {
             if tab_id == &root_tab_id {
                 // we do this before we extract panes so that the extraction won't trigger a
@@ -2614,6 +2653,7 @@ impl Screen {
         self.tabs
             .get_mut(&root_tab_id)
             .map(|t| t.stack_panes(root_pane_id, panes_to_stack));
+        return Some(root_pane_id);
     }
     pub fn change_floating_panes_coordinates(
         &mut self,
@@ -2629,6 +2669,87 @@ impl Screen {
             }
         }
     }
+    pub fn handle_mouse_event(&mut self, event: MouseEvent, client_id: ClientId) {
+        match self
+            .get_active_tab_mut(client_id)
+            .and_then(|tab| tab.handle_mouse_event(&event, client_id))
+        {
+            Ok(mouse_effect) => {
+                if let Some(pane_id) = mouse_effect.group_toggle {
+                    if self.advanced_mouse_actions {
+                        self.toggle_pane_id_in_group(pane_id, &client_id);
+                    }
+                }
+                if let Some(pane_id) = mouse_effect.group_add {
+                    if self.advanced_mouse_actions {
+                        self.add_pane_id_to_group(pane_id, &client_id);
+                    }
+                }
+                if mouse_effect.ungroup {
+                    if self.advanced_mouse_actions {
+                        self.clear_pane_group(&client_id);
+                    }
+                }
+                if mouse_effect.state_changed {
+                    let _ = self.log_and_report_session_state();
+                }
+                if !mouse_effect.leave_clipboard_message {
+                    let _ = self
+                        .bus
+                        .senders
+                        .send_to_plugin(PluginInstruction::Update(vec![(
+                            None,
+                            Some(client_id),
+                            Event::InputReceived,
+                        )]));
+                }
+                self.render(None).non_fatal();
+            },
+            Err(e) => {
+                eprintln!("mouse event error: {:?}", e);
+                log::error!("Failed to process MouseEvent: {}", e);
+            },
+        }
+    }
+    pub fn toggle_pane_in_group(&mut self, client_id: ClientId) -> Result<()> {
+        let err_context = "Can't add pane to group";
+        let active_tab = self
+            .get_active_tab(client_id)
+            .with_context(|| err_context)?;
+        let active_pane_id = active_tab
+            .get_active_pane_id(client_id)
+            .with_context(|| err_context)?;
+        self.toggle_pane_id_in_group(active_pane_id, &client_id);
+        let _ = self.log_and_report_session_state();
+        Ok(())
+    }
+    pub fn toggle_group_marking(&mut self, client_id: ClientId) -> Result<()> {
+        let (was_marking_before, marking_pane_group_now) = {
+            let mut currently_marking_pane_group = self.currently_marking_pane_group.borrow_mut();
+            let previous_value = currently_marking_pane_group
+                .remove(&client_id)
+                .unwrap_or(false);
+            let new_value = !previous_value;
+            if new_value {
+                currently_marking_pane_group.insert(client_id, true);
+            }
+            (previous_value, new_value)
+        };
+        if marking_pane_group_now {
+            let active_pane_id = self.get_active_pane_id(&client_id);
+            if let Some(active_pane_id) = active_pane_id {
+                self.add_pane_id_to_group(active_pane_id, &client_id);
+            }
+        }
+        let value_changed = was_marking_before != marking_pane_group_now;
+        if value_changed {
+            for tab in self.tabs.values_mut() {
+                tab.update_input_modes()?;
+            }
+            let _ = self.log_and_report_session_state();
+        }
+        Ok(())
+    }
     fn unblock_input(&self) -> Result<()> {
         self.bus
             .senders
@@ -2773,6 +2894,117 @@ impl Screen {
     fn connected_clients_contains(&self, client_id: &ClientId) -> bool {
         self.connected_clients.borrow().contains(client_id)
     }
+    fn get_client_pane_group(&self, client_id: &ClientId) -> HashSet<PaneId> {
+        self.current_pane_group
+            .borrow()
+            .get(client_id)
+            .map(|p| p.iter().copied().collect())
+            .unwrap_or_else(|| HashSet::new())
+    }
+    fn clear_pane_group(&mut self, client_id: &ClientId) {
+        self.current_pane_group
+            .borrow_mut()
+            .get_mut(client_id)
+            .map(|p| p.clear());
+        self.currently_marking_pane_group
+            .borrow_mut()
+            .remove(client_id);
+    }
+    fn toggle_pane_id_in_group(&mut self, pane_id: PaneId, client_id: &ClientId) {
+        {
+            let mut pane_groups = self.current_pane_group.borrow_mut();
+            let client_pane_group = pane_groups.entry(*client_id).or_insert_with(|| vec![]);
+            if client_pane_group.contains(&pane_id) {
+                client_pane_group.retain(|p| p != &pane_id);
+            } else {
+                client_pane_group.push(pane_id);
+            };
+        }
+        self.retain_only_existing_panes_in_pane_groups();
+    }
+    fn add_pane_id_to_group(&mut self, pane_id: PaneId, client_id: &ClientId) {
+        {
+            let mut pane_groups = self.current_pane_group.borrow_mut();
+            let client_pane_group = pane_groups.entry(*client_id).or_insert_with(|| vec![]);
+            if !client_pane_group.contains(&pane_id) {
+                client_pane_group.push(pane_id);
+            }
+        }
+        self.retain_only_existing_panes_in_pane_groups();
+    }
+    fn add_active_pane_to_group_if_marking(&mut self, client_id: &ClientId) {
+        {
+            if self
+                .currently_marking_pane_group
+                .borrow()
+                .get(client_id)
+                .copied()
+                .unwrap_or(false)
+            {
+                let active_pane_id = self.get_active_pane_id(&client_id);
+                if let Some(active_pane_id) = active_pane_id {
+                    self.add_pane_id_to_group(active_pane_id, &client_id);
+                }
+            }
+        }
+        self.retain_only_existing_panes_in_pane_groups();
+    }
+    fn get_active_pane_id(&self, client_id: &ClientId) -> Option<PaneId> {
+        let active_tab = self.get_active_tab(*client_id).ok()?;
+        active_tab.get_active_pane_id(*client_id)
+    }
+
+    fn group_and_ungroup_panes(
+        &mut self,
+        mut pane_ids_to_group: Vec<PaneId>,
+        pane_ids_to_ungroup: Vec<PaneId>,
+        client_id: ClientId,
+    ) {
+        {
+            let mut current_pane_group = self.current_pane_group.borrow_mut();
+            let client_pane_group = current_pane_group
+                .entry(client_id)
+                .or_insert_with(|| vec![]);
+            client_pane_group.append(&mut pane_ids_to_group);
+            client_pane_group.retain(|p| !pane_ids_to_ungroup.contains(p));
+        }
+        self.retain_only_existing_panes_in_pane_groups();
+        let _ = self.log_and_report_session_state();
+    }
+    fn retain_only_existing_panes_in_pane_groups(&mut self) {
+        let clients_with_empty_group = {
+            let mut clients_with_empty_group = vec![];
+            let mut current_pane_group = self.current_pane_group.borrow_mut();
+            for (client_id, panes_in_group) in current_pane_group.iter_mut() {
+                let all_tabs = self.get_tabs();
+                panes_in_group.retain(|p_id| {
+                    let mut found = false;
+                    for tab in all_tabs.values() {
+                        if tab.has_pane_with_pid(&p_id) {
+                            found = true;
+                            break;
+                        }
+                    }
+                    found
+                });
+                if panes_in_group.is_empty() {
+                    clients_with_empty_group.push(*client_id)
+                }
+            }
+            clients_with_empty_group
+        };
+        for client_id in &clients_with_empty_group {
+            self.currently_marking_pane_group
+                .borrow_mut()
+                .remove(client_id);
+        }
+        if !clients_with_empty_group.is_empty() {
+            let all_tabs = self.get_tabs_mut();
+            for tab in all_tabs.values_mut() {
+                let _ = tab.update_input_modes();
+            }
+        }
+    }
 }
 
 #[cfg(not(test))]
@@ -2839,6 +3071,7 @@ pub(crate) fn screen_thread_main(
         .unwrap_or(false); // by default, we try to support this if the terminal supports it and
                            // the program running inside a pane requests it
     let stacked_resize = config_options.stacked_resize.unwrap_or(true);
+    let advanced_mouse_actions = config_options.advanced_mouse_actions.unwrap_or(true);
 
     let thread_senders = bus.senders.clone();
     let mut screen = Screen::new(
@@ -2872,6 +3105,7 @@ pub(crate) fn screen_thread_main(
         explicitly_disable_kitty_keyboard_protocol,
         stacked_resize,
         default_editor,
+        advanced_mouse_actions,
     );
 
     let mut pending_tab_ids: HashSet<usize> = HashSet::new();
@@ -3053,7 +3287,6 @@ pub(crate) fn screen_thread_main(
                     .toggle_pane_embed_or_floating(client_id), ?);
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
-
                 screen.render(None)?;
             },
             ScreenInstruction::ToggleFloatingPanes(client_id, default_shell) => {
@@ -3195,12 +3428,14 @@ pub(crate) fn screen_thread_main(
                     |tab: &mut Tab, client_id: ClientId| tab.move_focus_left(client_id),
                     ?
                 );
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.render(None)?;
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
             },
             ScreenInstruction::MoveFocusLeftOrPreviousTab(client_id) => {
                 screen.move_focus_left_or_previous_tab(client_id)?;
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.unblock_input()?;
                 screen.render(None)?;
                 screen.log_and_report_session_state()?;
@@ -3212,6 +3447,7 @@ pub(crate) fn screen_thread_main(
                     |tab: &mut Tab, client_id: ClientId| tab.move_focus_down(client_id),
                     ?
                 );
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.render(None)?;
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
@@ -3223,12 +3459,14 @@ pub(crate) fn screen_thread_main(
                     |tab: &mut Tab, client_id: ClientId| tab.move_focus_right(client_id),
                     ?
                 );
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.render(None)?;
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
             },
             ScreenInstruction::MoveFocusRightOrNextTab(client_id) => {
                 screen.move_focus_right_or_next_tab(client_id)?;
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.unblock_input()?;
                 screen.render(None)?;
                 screen.log_and_report_session_state()?;
@@ -3240,6 +3478,7 @@ pub(crate) fn screen_thread_main(
                     |tab: &mut Tab, client_id: ClientId| tab.move_focus_up(client_id),
                     ?
                 );
+                screen.add_active_pane_to_group_if_marking(&client_id);
                 screen.render(None)?;
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
@@ -3546,6 +3785,7 @@ pub(crate) fn screen_thread_main(
 
                 screen.unblock_input()?;
                 screen.log_and_report_session_state()?;
+                screen.retain_only_existing_panes_in_pane_groups();
             },
             ScreenInstruction::HoldPane(id, exit_status, run_command) => {
                 let is_first_run = false;
@@ -3863,31 +4103,7 @@ pub(crate) fn screen_thread_main(
                 screen.unblock_input()?;
             },
             ScreenInstruction::MouseEvent(event, client_id) => {
-                match screen
+                screen.handle_mouse_event(event, client_id);
-                    .get_active_tab_mut(client_id)
-                    .and_then(|tab| tab.handle_mouse_event(&event, client_id))
-                {
-                    Ok(mouse_effect) => {
-                        if mouse_effect.state_changed {
-                            screen.log_and_report_session_state()?;
-                        }
-                        if !mouse_effect.leave_clipboard_message {
-                            let _ =
-                                screen
-                                    .bus
-                                    .senders
-                                    .send_to_plugin(PluginInstruction::Update(vec![(
-                                        None,
-                                        Some(client_id),
-                                        Event::InputReceived,
-                                    )]));
-                        }
-                        screen.render(None).non_fatal();
-                    },
-                    Err(e) => {
-                        log::error!("Failed to process MouseEvent: {}", e);
-                    },
-                }
             },
             ScreenInstruction::Copy(client_id) => {
                 active_tab!(screen, client_id, |tab: &mut Tab| tab
@@ -4019,12 +4235,28 @@ pub(crate) fn screen_thread_main(
                 }
                 screen.render(None)?;
             },
+            ScreenInstruction::AddHighlightPaneFrameColorOverride(pane_ids, error_text) => {
+                let all_tabs = screen.get_tabs_mut();
+                for pane_id in pane_ids {
+                    for tab in all_tabs.values_mut() {
+                        if tab.has_pane_with_pid(&pane_id) {
+                            tab.add_highlight_pane_frame_color_override(
+                                pane_id,
+                                error_text.clone(),
+                                None,
+                            );
+                            break;
+                        }
+                    }
+                }
+                screen.render(None)?;
+            },
             ScreenInstruction::ClearPaneFrameColorOverride(pane_ids) => {
                 let all_tabs = screen.get_tabs_mut();
                 for pane_id in pane_ids {
                     for tab in all_tabs.values_mut() {
                         if tab.has_pane_with_pid(&pane_id) {
-                            tab.clear_pane_frame_color_override(pane_id);
+                            tab.clear_pane_frame_color_override(pane_id, None);
                             break;
                         }
                     }
@@ -4642,6 +4874,7 @@ pub(crate) fn screen_thread_main(
                 hide_session_name,
                 stacked_resize,
                 default_editor,
+                advanced_mouse_actions,
             } => {
                 screen
                     .reconfigure(
@@ -4659,6 +4892,7 @@ pub(crate) fn screen_thread_main(
                         hide_session_name,
                         stacked_resize,
                         default_editor,
+                        advanced_mouse_actions,
                         client_id,
                     )
                     .non_fatal();
@@ -4845,7 +5079,7 @@ pub(crate) fn screen_thread_main(
                 let all_tabs = screen.get_tabs_mut();
                 for tab in all_tabs.values_mut() {
                     if tab.has_pane_with_pid(&pane_id) {
-                        tab.toggle_pane_embed_or_floating_for_pane_id(pane_id)
+                        tab.toggle_pane_embed_or_floating_for_pane_id(pane_id, None)
                             .non_fatal();
                         break;
                     }
@@ -4869,6 +5103,17 @@ pub(crate) fn screen_thread_main(
                     new_tab_name,
                     client_id,
                 )?;
+                // TODO: is this a race?
+                let pane_group = screen.get_client_pane_group(&client_id);
+                if !pane_group.is_empty() {
+                    let _ = screen.bus.senders.send_to_background_jobs(
+                        BackgroundJob::HighlightPanesWithMessage(
+                            pane_group.iter().copied().collect(),
+                            "BROKEN OUT".to_owned(),
+                        ),
+                    );
+                }
+                screen.clear_pane_group(&client_id);
             },
             ScreenInstruction::BreakPanesToTabWithIndex {
                 pane_ids,
@@ -4882,6 +5127,16 @@ pub(crate) fn screen_thread_main(
                     should_change_focus_to_new_tab,
                     client_id,
                 )?;
+                let pane_group = screen.get_client_pane_group(&client_id);
+                if !pane_group.is_empty() {
+                    let _ = screen.bus.senders.send_to_background_jobs(
+                        BackgroundJob::HighlightPanesWithMessage(
+                            pane_group.iter().copied().collect(),
+                            "BROKEN OUT".to_owned(),
+                        ),
+                    );
+                }
+                screen.clear_pane_group(&client_id);
             },
             ScreenInstruction::TogglePanePinned(client_id) => {
                 screen.toggle_pane_pinned(client_id);
@@ -4889,16 +5144,133 @@ pub(crate) fn screen_thread_main(
             ScreenInstruction::SetFloatingPanePinned(pane_id, should_be_pinned) => {
                 screen.set_floating_pane_pinned(pane_id, should_be_pinned);
             },
-            ScreenInstruction::StackPanes(pane_ids_to_stack) => {
+            ScreenInstruction::StackPanes(pane_ids_to_stack, client_id) => {
-                screen.stack_panes(pane_ids_to_stack);
+                if let Some(root_pane_id) = screen.stack_panes(pane_ids_to_stack) {
+                    let _ = screen.focus_pane_with_id(root_pane_id, false, client_id);
                     let _ = screen.unblock_input();
                     let _ = screen.render(None);
+                    let pane_group = screen.get_client_pane_group(&client_id);
+                    if !pane_group.is_empty() {
+                        let _ = screen.bus.senders.send_to_background_jobs(
+                            BackgroundJob::HighlightPanesWithMessage(
+                                pane_group.iter().copied().collect(),
+                                "STACKED".to_owned(),
+                            ),
+                        );
+                    }
+                    screen.clear_pane_group(&client_id);
+                }
             },
             ScreenInstruction::ChangeFloatingPanesCoordinates(pane_ids_and_coordinates) => {
                 screen.change_floating_panes_coordinates(pane_ids_and_coordinates);
                 let _ = screen.unblock_input();
                 let _ = screen.render(None);
             },
+            ScreenInstruction::GroupAndUngroupPanes(
+                pane_ids_to_group,
+                pane_ids_to_ungroup,
+                client_id,
+            ) => {
+                screen.group_and_ungroup_panes(pane_ids_to_group, pane_ids_to_ungroup, client_id);
+                let _ = screen.log_and_report_session_state();
+            },
+            ScreenInstruction::TogglePaneInGroup(client_id) => {
+                screen.toggle_pane_in_group(client_id).non_fatal();
+            },
+            ScreenInstruction::ToggleGroupMarking(client_id) => {
+                screen.toggle_group_marking(client_id).non_fatal();
+            },
+            ScreenInstruction::HighlightAndUnhighlightPanes(
+                pane_ids_to_highlight,
+                pane_ids_to_unhighlight,
+                client_id,
+            ) => {
+                {
+                    let all_tabs = screen.get_tabs_mut();
+                    for pane_id in pane_ids_to_highlight {
+                        for tab in all_tabs.values_mut() {
+                            if tab.has_pane_with_pid(&pane_id) {
+                                tab.add_highlight_pane_frame_color_override(
+                                    pane_id,
+                                    None,
+                                    Some(client_id),
+                                );
+                            }
+                        }
+                    }
+                    for pane_id in pane_ids_to_unhighlight {
+                        for tab in all_tabs.values_mut() {
+                            if tab.has_pane_with_pid(&pane_id) {
+                                tab.clear_pane_frame_color_override(pane_id, Some(client_id));
+                            }
+                        }
+                    }
+                    screen.render(None)?;
+                }
+                let _ = screen.log_and_report_session_state();
+            },
+            ScreenInstruction::FloatMultiplePanes(pane_ids_to_float, client_id) => {
+                {
+                    let all_tabs = screen.get_tabs_mut();
+                    let mut ejected_panes_in_group = vec![];
+                    for pane_id in pane_ids_to_float {
+                        for tab in all_tabs.values_mut() {
+                            if tab.has_pane_with_pid(&pane_id) {
+                                if !tab.pane_id_is_floating(&pane_id) {
+                                    ejected_panes_in_group.push(pane_id);
+                                    tab.toggle_pane_embed_or_floating_for_pane_id(
+                                        pane_id,
+                                        Some(client_id),
+                                    )
+                                    .non_fatal();
+                                }
+                                tab.show_floating_panes();
+                            }
+                        }
+                    }
+                    screen.render(None)?;
+                    if !ejected_panes_in_group.is_empty() {
+                        let _ = screen.bus.senders.send_to_background_jobs(
+                            BackgroundJob::HighlightPanesWithMessage(
+                                ejected_panes_in_group,
+                                "EJECTED".to_owned(),
+                            ),
+                        );
+                    }
+                }
+                let _ = screen.log_and_report_session_state();
+            },
+            ScreenInstruction::EmbedMultiplePanes(pane_ids_to_float, client_id) => {
+                {
+                    let all_tabs = screen.get_tabs_mut();
+                    let mut embedded_panes_in_group = vec![];
+                    for pane_id in pane_ids_to_float {
+                        for tab in all_tabs.values_mut() {
+                            if tab.has_pane_with_pid(&pane_id) {
+                                if tab.pane_id_is_floating(&pane_id) {
+                                    embedded_panes_in_group.push(pane_id);
+                                    tab.toggle_pane_embed_or_floating_for_pane_id(
+                                        pane_id,
+                                        Some(client_id),
+                                    )
+                                    .non_fatal();
+                                }
+                                tab.hide_floating_panes();
+                            }
+                        }
+                    }
+                    screen.render(None)?;
+                    if !embedded_panes_in_group.is_empty() {
+                        let _ = screen.bus.senders.send_to_background_jobs(
+                            BackgroundJob::HighlightPanesWithMessage(
+                                embedded_panes_in_group,
+                                "EMBEDDED".to_owned(),
+                            ),
+                        );
+                    }
+                }
+                let _ = screen.log_and_report_session_state();
+            },
         }
     }
     Ok(())

zellij-server/src/tab/mod.rs

@@ -46,7 +46,7 @@ use std::cell::RefCell;
 use std::rc::Rc;
 use std::time::Instant;
 use std::{
-    collections::{HashMap, HashSet},
+    collections::{BTreeMap, HashMap, HashSet},
     str,
 };
 use zellij_utils::{
@@ -152,6 +152,9 @@ enum BufferedTabInstruction {
 pub struct MouseEffect {
     pub state_changed: bool,
     pub leave_clipboard_message: bool,
+    pub group_toggle: Option<PaneId>,
+    pub group_add: Option<PaneId>,
+    pub ungroup: bool,
 }
 
 impl MouseEffect {
@@ -159,18 +162,54 @@ impl MouseEffect {
         MouseEffect {
             state_changed: true,
             leave_clipboard_message: false,
+            group_toggle: None,
+            group_add: None,
+            ungroup: false,
         }
     }
     pub fn leave_clipboard_message() -> Self {
         MouseEffect {
             state_changed: false,
             leave_clipboard_message: true,
+            group_toggle: None,
+            group_add: None,
+            ungroup: false,
         }
     }
     pub fn state_changed_and_leave_clipboard_message() -> Self {
         MouseEffect {
             state_changed: true,
             leave_clipboard_message: true,
+            group_toggle: None,
+            group_add: None,
+            ungroup: false,
+        }
+    }
+    pub fn group_toggle(pane_id: PaneId) -> Self {
+        MouseEffect {
+            state_changed: true,
+            leave_clipboard_message: false,
+            group_toggle: Some(pane_id),
+            group_add: None,
+            ungroup: false,
+        }
+    }
+    pub fn group_add(pane_id: PaneId) -> Self {
+        MouseEffect {
+            state_changed: true,
+            leave_clipboard_message: false,
+            group_toggle: None,
+            group_add: Some(pane_id),
+            ungroup: false,
+        }
+    }
+    pub fn ungroup() -> Self {
+        MouseEffect {
+            state_changed: true,
+            leave_clipboard_message: false,
+            group_toggle: None,
+            group_add: None,
+            ungroup: true,
         }
     }
 }
@@ -222,6 +261,10 @@ pub(crate) struct Tab {
     arrow_fonts: bool,
     styled_underlines: bool,
     explicitly_disable_kitty_keyboard_protocol: bool,
+    mouse_hover_pane_id: HashMap<ClientId, PaneId>,
+    current_pane_group: Rc<RefCell<HashMap<ClientId, Vec<PaneId>>>>,
+    advanced_mouse_actions: bool,
+    currently_marking_pane_group: Rc<RefCell<HashMap<ClientId, bool>>>,
 }
 
 #[derive(Clone, Debug, Default, Serialize, Deserialize)]
@@ -525,7 +568,13 @@ pub trait Pane {
         // No-op by default, only terminal panes support holding
     }
     fn add_red_pane_frame_color_override(&mut self, _error_text: Option<String>);
-    fn clear_pane_frame_color_override(&mut self);
+    fn add_highlight_pane_frame_color_override(
+        &mut self,
+        _text: Option<String>,
+        _client_id: Option<ClientId>,
+    ) {
+    }
+    fn clear_pane_frame_color_override(&mut self, _client_id: Option<ClientId>);
     fn frame_color_override(&self) -> Option<PaletteColor>;
     fn invoked_with(&self) -> &Option<Run>;
     fn set_title(&mut self, title: String);
@@ -626,6 +675,9 @@ impl Tab {
         styled_underlines: bool,
         explicitly_disable_kitty_keyboard_protocol: bool,
         default_editor: Option<PathBuf>,
+        current_pane_group: Rc<RefCell<HashMap<ClientId, Vec<PaneId>>>>,
+        currently_marking_pane_group: Rc<RefCell<HashMap<ClientId, bool>>>,
+        advanced_mouse_actions: bool,
     ) -> Self {
         let name = if name.is_empty() {
             format!("Tab #{}", index + 1)
@@ -720,6 +772,10 @@ impl Tab {
             styled_underlines,
             explicitly_disable_kitty_keyboard_protocol,
             default_editor,
+            mouse_hover_pane_id: HashMap::new(),
+            current_pane_group,
+            currently_marking_pane_group,
+            advanced_mouse_actions,
         }
     }
 
@@ -829,6 +885,9 @@ impl Tab {
             .non_fatal();
         }
         self.set_force_render();
+        self.senders
+            .send_to_pty_writer(PtyWriteInstruction::ApplyCachedResizes)
+            .with_context(|| format!("failed to apply cached resizes"))?;
         Ok(())
     }
     fn relayout_tiled_panes(&mut self, search_backwards: bool) -> Result<()> {
@@ -873,6 +932,9 @@ impl Tab {
         // we do this so that the new swap layout has a chance to pass through the constraint system
         self.tiled_panes.resize(display_area);
         self.set_should_clear_display_before_rendering();
+        self.senders
+            .send_to_pty_writer(PtyWriteInstruction::ApplyCachedResizes)
+            .with_context(|| format!("failed to apply cached resizes"))?;
         Ok(())
     }
     pub fn previous_swap_layout(&mut self) -> Result<()> {
@@ -882,9 +944,6 @@ impl Tab {
         } else {
             self.relayout_tiled_panes(search_backwards)?;
         }
-        self.senders
-            .send_to_pty_writer(PtyWriteInstruction::ApplyCachedResizes)
-            .with_context(|| format!("failed to update plugins with mode info"))?;
         Ok(())
     }
     pub fn next_swap_layout(&mut self) -> Result<()> {
@@ -894,9 +953,6 @@ impl Tab {
         } else {
             self.relayout_tiled_panes(search_backwards)?;
         }
-        self.senders
-            .send_to_pty_writer(PtyWriteInstruction::ApplyCachedResizes)
-            .with_context(|| format!("failed to update plugins with mode info"))?;
         Ok(())
     }
     pub fn apply_buffered_instructions(&mut self) -> Result<()> {
@@ -936,6 +992,7 @@ impl Tab {
         // this updates all plugins with the client's input mode
         let mode_infos = self.mode_info.borrow();
         let mut plugin_updates = vec![];
+        let currently_marking_pane_group = self.currently_marking_pane_group.borrow();
         for client_id in self.connected_clients.borrow().iter() {
             let mut mode_info = mode_infos
                 .get(client_id)
@@ -943,6 +1000,8 @@ impl Tab {
                 .clone();
             mode_info.shell = Some(self.default_shell.clone());
             mode_info.editor = self.default_editor.clone();
+            mode_info.currently_marking_pane_group =
+                currently_marking_pane_group.get(client_id).copied();
             plugin_updates.push((None, Some(*client_id), Event::ModeUpdate(mode_info)));
         }
         self.senders
@@ -1044,6 +1103,9 @@ impl Tab {
     pub fn has_no_connected_clients(&self) -> bool {
         self.connected_clients.borrow().is_empty()
     }
+    pub fn pane_id_is_floating(&self, pane_id: &PaneId) -> bool {
+        self.floating_panes.panes_contain(pane_id)
+    }
     pub fn toggle_pane_embed_or_floating(&mut self, client_id: ClientId) -> Result<()> {
         let err_context =
             || format!("failed to toggle embedded/floating pane for client {client_id}");
@@ -1079,7 +1141,11 @@ impl Tab {
         }
         Ok(())
     }
-    pub fn toggle_pane_embed_or_floating_for_pane_id(&mut self, pane_id: PaneId) -> Result<()> {
+    pub fn toggle_pane_embed_or_floating_for_pane_id(
+        &mut self,
+        pane_id: PaneId,
+        client_id: Option<ClientId>,
+    ) -> Result<()> {
         let err_context = || {
             format!(
                 "failed to toggle embedded/floating pane for pane_id {:?}",
@@ -1097,7 +1163,7 @@ impl Tab {
                         format!("failed to find floating pane (ID: {pane_id:?}) to embed",)
                     })
                     .with_context(err_context)?;
-                self.add_tiled_pane(floating_pane_to_embed, pane_id, None)?;
+                self.add_tiled_pane(floating_pane_to_embed, pane_id, client_id)?;
             }
         } else if self.tiled_panes.panes_contain(&pane_id) {
             if self.get_selectable_tiled_panes().count() <= 1 {
@@ -2210,14 +2276,21 @@ impl Tab {
             floating_panes_stack,
         );
 
+        let current_pane_group: HashMap<ClientId, Vec<PaneId>> =
+            { self.current_pane_group.borrow().clone() };
         self.tiled_panes
-            .render(output, self.floating_panes.panes_are_visible())
+            .render(
+                output,
+                self.floating_panes.panes_are_visible(),
+                &self.mouse_hover_pane_id,
+                current_pane_group.clone(),
+            )
             .with_context(err_context)?;
         if (self.floating_panes.panes_are_visible() && self.floating_panes.has_active_panes())
             || self.floating_panes.has_pinned_panes()
         {
             self.floating_panes
-                .render(output)
+                .render(output, &self.mouse_hover_pane_id, current_pane_group)
                 .with_context(err_context)?;
         }
 
@@ -2817,7 +2890,7 @@ impl Tab {
                 self.swap_layouts.set_is_floating_damaged();
                 // only relayout if the user is already "in" a layout, otherwise this might be
                 // confusing
-                let _ = self.next_swap_layout();
+                let _ = self.relayout_floating_panes(false);
             }
         } else {
             if self.tiled_panes.fullscreen_is_active() {
@@ -2830,7 +2903,7 @@ impl Tab {
                 self.swap_layouts.set_is_tiled_damaged();
                 // only relayout if the user is already "in" a layout, otherwise this might be
                 // confusing
-                let _ = self.next_swap_layout();
+                let _ = self.relayout_tiled_panes(false);
             }
         };
         let _ = self.senders.send_to_plugin(PluginInstruction::Update(vec![(
@@ -2878,7 +2951,7 @@ impl Tab {
                 self.swap_layouts.set_is_floating_damaged();
                 // only relayout if the user is already "in" a layout, otherwise this might be
                 // confusing
-                let _ = self.next_swap_layout();
+                let _ = self.relayout_floating_panes(false);
             }
             // we do this so that the logical index will not affect ordering in the target tab
             if let Some(closed_pane) = closed_pane.as_mut() {
@@ -2896,7 +2969,7 @@ impl Tab {
                 self.swap_layouts.set_is_tiled_damaged();
                 // only relayout if the user is already "in" a layout, otherwise this might be
                 // confusing
-                let _ = self.next_swap_layout();
+                let _ = self.relayout_tiled_panes(false);
             }
             // we do this so that the logical index will not affect ordering in the target tab
             if let Some(closed_pane) = closed_pane.as_mut() {
@@ -3460,6 +3533,13 @@ impl Tab {
                 .ok_or_else(|| anyhow!("Failed to find pane at position"))?
                 .pid();
             match event.event_type {
+                MouseEventType::Press if event.alt => {
+                    self.mouse_hover_pane_id.remove(&client_id);
+                    Ok(MouseEffect::group_toggle(pane_id_at_position))
+                },
+                MouseEventType::Motion if event.alt => {
+                    Ok(MouseEffect::group_add(pane_id_at_position))
+                },
                 MouseEventType::Press => {
                     if pane_id_at_position == active_pane_id {
                         self.handle_active_pane_left_mouse_press(event, client_id)
@@ -3474,6 +3554,9 @@ impl Tab {
             self.handle_scrollwheel_up(&event.position, 3, client_id)
         } else if event.wheel_down {
             self.handle_scrollwheel_down(&event.position, 3, client_id)
+        } else if event.right && event.alt {
+            self.mouse_hover_pane_id.remove(&client_id);
+            Ok(MouseEffect::ungroup())
         } else if event.right {
             self.handle_right_click(&event, client_id)
         } else if event.middle {
@@ -3838,6 +3921,12 @@ impl Tab {
                         .with_context(err_context)?;
                     }
                 }
+                self.mouse_hover_pane_id.remove(&client_id);
+            } else {
+                let pane_id = pane.pid();
+                if self.advanced_mouse_actions {
+                    self.mouse_hover_pane_id.insert(client_id, pane_id);
+                }
             }
         };
         Ok(MouseEffect::leave_clipboard_message())
@@ -4024,7 +4113,7 @@ impl Tab {
 
         Ok(())
     }
-    pub fn visible(&self, visible: bool) -> Result<()> {
+    pub fn visible(&mut self, visible: bool) -> Result<()> {
         let pids_in_this_tab = self.tiled_panes.pane_ids().filter_map(|p| match p {
             PaneId::Plugin(pid) => Some(pid),
             _ => None,
@@ -4036,6 +4125,9 @@ impl Tab {
         self.senders
             .send_to_plugin(PluginInstruction::Update(plugin_updates))
             .with_context(|| format!("failed to set visibility of tab to {visible}"))?;
+        if !visible {
+            self.mouse_hover_pane_id.clear();
+        }
         Ok(())
     }
 
@@ -4200,7 +4292,12 @@ impl Tab {
             pane.add_red_pane_frame_color_override(error_text);
         }
     }
-    pub fn clear_pane_frame_color_override(&mut self, pane_id: PaneId) {
+    pub fn add_highlight_pane_frame_color_override(
+        &mut self,
+        pane_id: PaneId,
+        error_text: Option<String>,
+        client_id: Option<ClientId>,
+    ) {
         if let Some(pane) = self
             .tiled_panes
             .get_pane_mut(pane_id)
@@ -4212,7 +4309,26 @@ impl Tab {
                     .map(|s_p| &mut s_p.1)
             })
         {
-            pane.clear_pane_frame_color_override();
+            pane.add_highlight_pane_frame_color_override(error_text, client_id);
+        }
+    }
+    pub fn clear_pane_frame_color_override(
+        &mut self,
+        pane_id: PaneId,
+        client_id: Option<ClientId>,
+    ) {
+        if let Some(pane) = self
+            .tiled_panes
+            .get_pane_mut(pane_id)
+            .or_else(|| self.floating_panes.get_pane_mut(pane_id))
+            .or_else(|| {
+                self.suppressed_panes
+                    .values_mut()
+                    .find(|s_p| s_p.1.pid() == pane_id)
+                    .map(|s_p| &mut s_p.1)
+            })
+        {
+            pane.clear_pane_frame_color_override(client_id);
         }
     }
     pub fn update_plugin_loading_stage(&mut self, pid: u32, loading_indication: LoadingIndication) {
@@ -4351,12 +4467,14 @@ impl Tab {
     }
     pub fn pane_infos(&self) -> Vec<PaneInfo> {
         let mut pane_info = vec![];
-        let mut tiled_pane_info = self.tiled_panes.pane_info();
+        let current_pane_group = { self.current_pane_group.borrow().clone() };
-        let mut floating_pane_info = self.floating_panes.pane_info();
+        let mut tiled_pane_info = self.tiled_panes.pane_info(&current_pane_group);
+        let mut floating_pane_info = self.floating_panes.pane_info(&current_pane_group);
         pane_info.append(&mut tiled_pane_info);
         pane_info.append(&mut floating_pane_info);
         for (pane_id, (_is_scrollback_editor, pane)) in self.suppressed_panes.iter() {
-            let mut pane_info_for_suppressed_pane = pane_info_for_pane(pane_id, pane);
+            let mut pane_info_for_suppressed_pane =
+                pane_info_for_pane(pane_id, pane, &current_pane_group);
             pane_info_for_suppressed_pane.is_floating = false;
             pane_info_for_suppressed_pane.is_suppressed = true;
             pane_info_for_suppressed_pane.is_focused = false;
@@ -4397,7 +4515,7 @@ impl Tab {
             // confusing and not what the user intends
             self.swap_layouts.set_is_floating_damaged(); // we do this so that we won't skip to the
                                                          // next layout
-            self.next_swap_layout()?;
+            self.relayout_floating_panes(false)?;
         }
         Ok(())
     }
@@ -4431,7 +4549,7 @@ impl Tab {
             // confusing and not what the user intends
             self.swap_layouts.set_is_tiled_damaged(); // we do this so that we won't skip to the
                                                       // next layout
-            self.next_swap_layout()?;
+            self.relayout_tiled_panes(false)?;
         }
         Ok(())
     }
@@ -4589,6 +4707,9 @@ impl Tab {
     pub fn update_auto_layout(&mut self, auto_layout: bool) {
         self.auto_layout = auto_layout;
     }
+    pub fn update_advanced_mouse_actions(&mut self, advanced_mouse_actions: bool) {
+        self.advanced_mouse_actions = advanced_mouse_actions;
+    }
     pub fn extract_suppressed_panes(&mut self) -> SuppressedPanes {
         self.suppressed_panes.drain().collect()
     }
@@ -4609,17 +4730,25 @@ impl Tab {
             self.set_force_render();
         }
     }
-    pub fn has_room_for_stack(&self, root_pane_id: PaneId, stack_size: usize) -> bool {
+    pub fn has_room_for_stack(&mut self, root_pane_id: PaneId, stack_size: usize) -> bool {
         if self.floating_panes.panes_contain(&root_pane_id)
             || self.suppressed_panes.contains_key(&root_pane_id)
         {
             log::error!("Root pane of stack cannot be floating or suppressed");
             return false;
         }
+        if self.pane_is_stacked(root_pane_id) {
+            let room_left_in_stack = self
+                .tiled_panes
+                .room_left_in_stack_of_pane_id(&root_pane_id)
+                .unwrap_or(0);
+            stack_size <= room_left_in_stack
+        } else {
             self.get_pane_with_id(root_pane_id)
                 .map(|p| p.position_and_size().rows.as_usize() >= stack_size + MIN_TERMINAL_HEIGHT)
                 .unwrap_or(false)
         }
+    }
     pub fn set_tiled_panes_damaged(&mut self) {
         self.swap_layouts.set_is_tiled_damaged();
     }
@@ -4629,7 +4758,26 @@ impl Tab {
             return;
         }
         self.swap_layouts.set_is_tiled_damaged(); // TODO: verify we can do all the below first
-
+        if self.pane_is_stacked(root_pane_id) {
+            if let Some(lowest_pane_id_in_stack) = self
+                .tiled_panes
+                .pane_ids_in_stack_of_pane_id(&root_pane_id)
+                .last()
+            {
+                // we get lowest_pane_id_in_stack so that we can extract the pane below and re-add
+                // it to its own stack - this has the effect of making it the last pane in the
+                // stack so that the rest of the panes will later be added below it - which makes
+                // sense from the perspective of the user
+                if let Some(pane) = self.extract_pane(root_pane_id, true) {
+                    self.tiled_panes
+                        .add_pane_to_stack(&lowest_pane_id_in_stack, pane);
+                }
+            }
+            for pane in panes_to_stack.drain(..) {
+                self.tiled_panes.add_pane_to_stack(&root_pane_id, pane);
+            }
+            self.tiled_panes.expand_pane_in_stack(root_pane_id);
+        } else {
             // + 1 for the root pane
             let mut stack_geoms = self
                 .tiled_panes
@@ -4658,6 +4806,7 @@ impl Tab {
                 self.tiled_panes.expand_pane_in_stack(root_pane_id);
             }
         }
+    }
     pub fn change_floating_pane_coordinates(
         &mut self,
         pane_id: &PaneId,
@@ -4723,9 +4872,18 @@ impl Tab {
             (is_scrollback_editor, replaced_pane),
         );
     }
+    fn pane_is_stacked(&self, pane_id: PaneId) -> bool {
+        self.get_pane_with_id(pane_id)
+            .map(|p| p.position_and_size().stacked.is_some())
+            .unwrap_or(false)
+    }
 }
 
-pub fn pane_info_for_pane(pane_id: &PaneId, pane: &Box<dyn Pane>) -> PaneInfo {
+pub fn pane_info_for_pane(
+    pane_id: &PaneId,
+    pane: &Box<dyn Pane>,
+    current_pane_group: &HashMap<ClientId, Vec<PaneId>>,
+) -> PaneInfo {
     let mut pane_info = PaneInfo::default();
     pane_info.pane_x = pane.x();
     pane_info.pane_content_x = pane.get_content_x();
@@ -4741,6 +4899,17 @@ pub fn pane_info_for_pane(pane_id: &PaneId, pane: &Box<dyn Pane>) -> PaneInfo {
     pane_info.exited = pane.exited();
     pane_info.exit_status = pane.exit_status();
     pane_info.is_held = pane.is_held();
+    let index_in_pane_group: BTreeMap<ClientId, usize> = current_pane_group
+        .iter()
+        .filter_map(|(client_id, pane_ids)| {
+            if let Some(position) = pane_ids.iter().position(|p_id| p_id == &pane.pid()) {
+                Some((*client_id, position))
+            } else {
+                None
+            }
+        })
+        .collect();
+    pane_info.index_in_pane_group = index_in_pane_group;
 
     match pane_id {
         PaneId::Terminal(terminal_id) => {

zellij-server/src/tab/unit/tab_integration_tests.rs

@@ -224,10 +224,13 @@ fn create_new_tab(size: Size, default_mode: ModeInfo) -> Tab {
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -256,6 +259,9 @@ fn create_new_tab(size: Size, default_mode: ModeInfo) -> Tab {
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),
@@ -292,10 +298,13 @@ fn create_new_tab_without_pane_frames(size: Size, default_mode: ModeInfo) -> Tab
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -324,6 +333,9 @@ fn create_new_tab_without_pane_frames(size: Size, default_mode: ModeInfo) -> Tab
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),
@@ -375,10 +387,13 @@ fn create_new_tab_with_swap_layouts(
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -407,6 +422,9 @@ fn create_new_tab_with_swap_layouts(
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     let (
         base_layout,
@@ -459,10 +477,13 @@ fn create_new_tab_with_os_api(
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -491,6 +512,9 @@ fn create_new_tab_with_os_api(
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),
@@ -529,10 +553,13 @@ fn create_new_tab_with_layout(size: Size, default_mode: ModeInfo, layout: &str)
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
     let layout = Layout::from_str(layout, "layout_file_name".into(), None, None).unwrap();
     let (tab_layout, floating_panes_layout) = layout.new_tab();
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -561,6 +588,9 @@ fn create_new_tab_with_layout(size: Size, default_mode: ModeInfo, layout: &str)
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     let pane_ids = tab_layout
         .extract_run_instructions()
@@ -613,10 +643,13 @@ fn create_new_tab_with_mock_pty_writer(
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -645,6 +678,9 @@ fn create_new_tab_with_mock_pty_writer(
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),
@@ -688,10 +724,13 @@ fn create_new_tab_with_sixel_support(
     let terminal_emulator_colors = Rc::new(RefCell::new(Palette::default()));
     let copy_options = CopyOptions::default();
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
+    let current_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -720,6 +759,9 @@ fn create_new_tab_with_sixel_support(
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),

zellij-server/src/tab/unit/tab_tests.rs

@@ -165,10 +165,13 @@ fn create_new_tab(size: Size, stacked_resize: bool) -> Tab {
     let copy_options = CopyOptions::default();
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
+    let current_pane_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -197,6 +200,9 @@ fn create_new_tab(size: Size, stacked_resize: bool) -> Tab {
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_pane_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),
@@ -232,10 +238,13 @@ fn create_new_tab_with_layout(size: Size, layout: TiledPaneLayout) -> Tab {
     let copy_options = CopyOptions::default();
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
+    let current_pane_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -264,6 +273,9 @@ fn create_new_tab_with_layout(size: Size, layout: TiledPaneLayout) -> Tab {
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_pane_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     let mut new_terminal_ids = vec![];
     for i in 0..layout.extract_run_instructions().len() {
@@ -304,11 +316,14 @@ fn create_new_tab_with_cell_size(
     let copy_options = CopyOptions::default();
     let sixel_image_store = Rc::new(RefCell::new(SixelImageStore::default()));
     let terminal_emulator_color_codes = Rc::new(RefCell::new(HashMap::new()));
+    let stacked_resize = Rc::new(RefCell::new(true));
+    let current_pane_group = Rc::new(RefCell::new(HashMap::new()));
+    let currently_marking_pane_group = Rc::new(RefCell::new(HashMap::new()));
     let debug = false;
     let arrow_fonts = true;
     let styled_underlines = true;
     let explicitly_disable_kitty_keyboard_protocol = false;
-    let stacked_resize = Rc::new(RefCell::new(true));
+    let advanced_mouse_actions = true;
     let mut tab = Tab::new(
         index,
         position,
@@ -337,6 +352,9 @@ fn create_new_tab_with_cell_size(
         styled_underlines,
         explicitly_disable_kitty_keyboard_protocol,
         None,
+        current_pane_group,
+        currently_marking_pane_group,
+        advanced_mouse_actions,
     );
     tab.apply_layout(
         TiledPaneLayout::default(),

zellij-server/src/ui/boundaries.rs

@@ -33,7 +33,7 @@ pub type BoundaryType = &'static str; // easy way to refer to boundary_type abov
 pub struct BoundarySymbol {
     boundary_type: BoundaryType,
     invisible: bool,
-    color: Option<PaletteColor>,
+    color: Option<(PaletteColor, usize)>, // (color, color_precedence)
 }
 
 impl BoundarySymbol {
@@ -41,10 +41,10 @@ impl BoundarySymbol {
         BoundarySymbol {
             boundary_type,
             invisible: false,
-            color: Some(PaletteColor::EightBit(colors::GRAY)),
+            color: Some((PaletteColor::EightBit(colors::GRAY), 0)),
         }
     }
-    pub fn color(&mut self, color: Option<PaletteColor>) -> Self {
+    pub fn color(&mut self, color: Option<(PaletteColor, usize)>) -> Self {
         self.color = color;
         *self
     }
@@ -66,7 +66,7 @@ impl BoundarySymbol {
             TerminalCharacter::new_singlewidth_styled(
                 character,
                 RESET_STYLES
-                    .foreground(self.color.map(|palette_color| palette_color.into()))
+                    .foreground(self.color.map(|palette_color| palette_color.0.into()))
                     .into(),
             )
         };
@@ -79,7 +79,7 @@ impl Display for BoundarySymbol {
         match self.invisible {
             true => write!(f, " "),
             false => match self.color {
-                Some(color) => match color {
+                Some(color) => match color.0 {
                     PaletteColor::Rgb((r, g, b)) => {
                         write!(f, "{}", RGB(r, g, b).paint(self.boundary_type))
                     },
@@ -99,7 +99,17 @@ fn combine_symbols(
 ) -> Option<BoundarySymbol> {
     use boundary_type::*;
     let invisible = current_symbol.invisible || next_symbol.invisible;
-    let color = current_symbol.color.or(next_symbol.color);
+    let color = match (current_symbol.color, next_symbol.color) {
+        (Some(current_symbol_color), Some(next_symbol_color)) => {
+            let ret = if current_symbol_color.1 >= next_symbol_color.1 {
+                Some(current_symbol_color)
+            } else {
+                Some(next_symbol_color)
+            };
+            ret
+        },
+        _ => current_symbol.color.or(next_symbol.color),
+    };
     match (current_symbol.boundary_type, next_symbol.boundary_type) {
         (CROSS, _) | (_, CROSS) => {
             // (┼, *) or (*, ┼) => Some(┼)
@@ -447,7 +457,7 @@ impl Boundaries {
     pub fn add_rect(
         &mut self,
         rect: &dyn Pane,
-        color: Option<PaletteColor>,
+        color: Option<(PaletteColor, usize)>, // (color, color_precedence)
         pane_is_on_top_of_stack: bool,
         pane_is_on_bottom_of_stack: bool,
         pane_is_stacked_under: bool,

zellij-server/src/ui/components/text.rs

@@ -59,13 +59,13 @@ pub fn stringify_text(
         }
         text_width += character_width;
 
-        if text.selected {
+        if text.selected || text.opaque {
             // we do this so that selected text will appear selected
             // even if it does not have color indices
             stringified.push_str(&format!("{}", base_text_style));
         }
 
-        if !text.indices.is_empty() || text.selected {
+        if !text.indices.is_empty() || text.selected || text.opaque {
             let character_with_styling =
                 color_index_character(character, i, &text, style, base_text_style);
             stringified.push_str(&character_with_styling);

zellij-server/src/ui/pane_boundaries_frame.rs

@@ -53,7 +53,7 @@ enum ExitStatus {
 
 pub struct FrameParams {
     pub focused_client: Option<ClientId>,
-    pub is_main_client: bool,
+    pub is_main_client: bool, // more accurately: is_focused_for_main_client
     pub other_focused_clients: Vec<ClientId>,
     pub style: Style,
     pub color: Option<PaletteColor>,
@@ -63,6 +63,7 @@ pub struct FrameParams {
     pub should_draw_pane_frames: bool,
     pub pane_is_floating: bool,
     pub content_offset: Offset,
+    pub mouse_is_hovering_over_pane: bool,
 }
 
 #[derive(Default, PartialEq)]
@@ -84,6 +85,7 @@ pub struct PaneFrame {
     is_pinned: bool,
     is_floating: bool,
     content_offset: Offset,
+    mouse_is_hovering_over_pane: bool,
 }
 
 impl PaneFrame {
@@ -111,6 +113,7 @@ impl PaneFrame {
             is_pinned: false,
             is_floating: frame_params.pane_is_floating,
             content_offset: frame_params.content_offset,
+            mouse_is_hovering_over_pane: frame_params.mouse_is_hovering_over_pane,
         }
     }
     pub fn is_pinned(mut self, is_pinned: bool) -> Self {
@@ -755,6 +758,34 @@ impl PaneFrame {
         };
         Ok(res)
     }
+    fn render_mouse_shortcuts_undertitle(&self) -> Result<Vec<TerminalCharacter>> {
+        let max_undertitle_length = self.geom.cols.saturating_sub(2); // 2 for the left and right corners
+        let mut left_boundary =
+            foreground_color(self.get_corner(boundary_type::BOTTOM_LEFT), self.color);
+        let mut right_boundary =
+            foreground_color(self.get_corner(boundary_type::BOTTOM_RIGHT), self.color);
+        let res = if self.is_main_client {
+            self.empty_undertitle(max_undertitle_length)
+        } else {
+            let (mut hover_shortcuts, hover_shortcuts_len) = self.hover_shortcuts_part_full();
+            if hover_shortcuts_len <= max_undertitle_length {
+                // render exit status and tips
+                let mut padding = String::new();
+                for _ in hover_shortcuts_len..max_undertitle_length {
+                    padding.push_str(boundary_type::HORIZONTAL);
+                }
+                let mut ret = vec![];
+                ret.append(&mut left_boundary);
+                ret.append(&mut hover_shortcuts);
+                ret.append(&mut foreground_color(&padding, self.color));
+                ret.append(&mut right_boundary);
+                ret
+            } else {
+                self.empty_undertitle(max_undertitle_length)
+            }
+        };
+        Ok(res)
+    }
     pub fn clicked_on_pinned(&mut self, position: Position) -> bool {
         if self.is_floating {
             // TODO: this is not entirely accurate because our relative position calculation in
@@ -810,7 +841,16 @@ impl PaneFrame {
                     character_chunks.push(CharacterChunk::new(title, x, y));
                 } else if row == self.geom.rows - 1 {
                     // bottom row
-                    if self.exit_status.is_some() || self.is_first_run {
+                    if self.mouse_is_hovering_over_pane && !self.is_main_client {
+                        let x = self.geom.x;
+                        let y = self.geom.y + row;
+                        character_chunks.push(CharacterChunk::new(
+                            self.render_mouse_shortcuts_undertitle()
+                                .with_context(err_context)?,
+                            x,
+                            y,
+                        ));
+                    } else if self.exit_status.is_some() || self.is_first_run {
                         let x = self.geom.x;
                         let y = self.geom.y + row;
                         character_chunks.push(CharacterChunk::new(
@@ -964,6 +1004,26 @@ impl PaneFrame {
                 + break_tip.len(),
         )
     }
+    fn hover_shortcuts_part_full(&self) -> (Vec<TerminalCharacter>, usize) {
+        // (title part, length)
+        let mut hover_shortcuts = vec![];
+        let alt_click_text = " Alt <Click>";
+        let alt_click_tip = " - group,";
+        let alt_right_click_text = " Alt <Right-Click>";
+        let alt_right_click_tip = " - ungroup all ";
+
+        hover_shortcuts.append(&mut foreground_color(alt_click_text, self.color));
+        hover_shortcuts.append(&mut foreground_color(alt_click_tip, self.color));
+        hover_shortcuts.append(&mut foreground_color(alt_right_click_text, self.color));
+        hover_shortcuts.append(&mut foreground_color(alt_right_click_tip, self.color));
+        (
+            hover_shortcuts,
+            alt_click_text.chars().count()
+                + alt_click_tip.chars().count()
+                + alt_right_click_text.chars().count()
+                + alt_right_click_tip.chars().count(),
+        )
+    }
     fn empty_undertitle(&self, max_undertitle_length: usize) -> Vec<TerminalCharacter> {
         let mut left_boundary =
             foreground_color(self.get_corner(boundary_type::BOTTOM_LEFT), self.color);

zellij-server/src/ui/pane_contents_and_ui.rs

@@ -4,7 +4,7 @@ use crate::tab::Pane;
 use crate::ui::boundaries::Boundaries;
 use crate::ui::pane_boundaries_frame::FrameParams;
 use crate::ClientId;
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use zellij_utils::data::{client_id_to_colors, InputMode, PaletteColor, Style};
 use zellij_utils::errors::prelude::*;
 pub struct PaneContentsAndUi<'a> {
@@ -17,6 +17,8 @@ pub struct PaneContentsAndUi<'a> {
     pane_is_stacked_under: bool,
     pane_is_stacked_over: bool,
     should_draw_pane_frames: bool,
+    mouse_is_hovering_over_pane_for_clients: HashSet<ClientId>,
+    current_pane_group: HashMap<ClientId, Vec<PaneId>>,
 }
 
 impl<'a> PaneContentsAndUi<'a> {
@@ -30,6 +32,8 @@ impl<'a> PaneContentsAndUi<'a> {
         pane_is_stacked_under: bool,
         pane_is_stacked_over: bool,
         should_draw_pane_frames: bool,
+        mouse_hover_pane_id: &HashMap<ClientId, PaneId>,
+        current_pane_group: HashMap<ClientId, Vec<PaneId>>,
     ) -> Self {
         let mut focused_clients: Vec<ClientId> = active_panes
             .iter()
@@ -37,6 +41,16 @@ impl<'a> PaneContentsAndUi<'a> {
             .map(|(c_id, _p_id)| *c_id)
             .collect();
         focused_clients.sort_unstable();
+        let mouse_is_hovering_over_pane_for_clients = mouse_hover_pane_id
+            .iter()
+            .filter_map(|(client_id, pane_id)| {
+                if pane_id == &pane.pid() {
+                    Some(*client_id)
+                } else {
+                    None
+                }
+            })
+            .collect();
         PaneContentsAndUi {
             pane,
             output,
@@ -47,6 +61,8 @@ impl<'a> PaneContentsAndUi<'a> {
             pane_is_stacked_under,
             pane_is_stacked_over,
             should_draw_pane_frames,
+            mouse_is_hovering_over_pane_for_clients,
+            current_pane_group,
         }
     }
     pub fn render_pane_contents_to_multiple_clients(
@@ -217,13 +233,16 @@ impl<'a> PaneContentsAndUi<'a> {
                 is_main_client: pane_focused_for_client_id,
                 other_focused_clients: vec![],
                 style: self.style,
-                color: frame_color,
+                color: frame_color.map(|c| c.0),
                 other_cursors_exist_in_session: false,
                 pane_is_stacked_over: self.pane_is_stacked_over,
                 pane_is_stacked_under: self.pane_is_stacked_under,
                 should_draw_pane_frames: self.should_draw_pane_frames,
                 pane_is_floating,
                 content_offset: self.pane.get_content_offset(),
+                mouse_is_hovering_over_pane: self
+                    .mouse_is_hovering_over_pane_for_clients
+                    .contains(&client_id),
             }
         } else {
             FrameParams {
@@ -231,13 +250,16 @@ impl<'a> PaneContentsAndUi<'a> {
                 is_main_client: pane_focused_for_client_id,
                 other_focused_clients,
                 style: self.style,
-                color: frame_color,
+                color: frame_color.map(|c| c.0),
                 other_cursors_exist_in_session: self.multiple_users_exist_in_session,
                 pane_is_stacked_over: self.pane_is_stacked_over,
                 pane_is_stacked_under: self.pane_is_stacked_under,
                 should_draw_pane_frames: self.should_draw_pane_frames,
                 pane_is_floating,
                 content_offset: self.pane.get_content_offset(),
+                mouse_is_hovering_over_pane: self
+                    .mouse_is_hovering_over_pane_for_clients
+                    .contains(&client_id),
             }
         };
 
@@ -279,27 +301,48 @@ impl<'a> PaneContentsAndUi<'a> {
         client_id: ClientId,
         mode: InputMode,
         session_is_mirrored: bool,
-    ) -> Option<PaletteColor> {
+    ) -> Option<(PaletteColor, usize)> {
+        // (color, color_precedence) (the color_precedence is used
+        // for the no-pane-frames mode)
         let pane_focused_for_client_id = self.focused_clients.contains(&client_id);
-        if let Some(override_color) = self.pane.frame_color_override() {
+        let pane_is_in_group = self
-            Some(override_color)
+            .current_pane_group
+            .get(&client_id)
+            .map(|p| p.contains(&self.pane.pid()))
+            .unwrap_or(false);
+        if self.pane.frame_color_override().is_some() && !pane_is_in_group {
+            self.pane
+                .frame_color_override()
+                .map(|override_color| (override_color, 4))
+        } else if pane_is_in_group && !pane_focused_for_client_id {
+            Some((self.style.colors.frame_highlight.emphasis_0, 2))
+        } else if pane_is_in_group && pane_focused_for_client_id {
+            Some((self.style.colors.frame_highlight.emphasis_1, 3))
         } else if pane_focused_for_client_id {
             match mode {
                 InputMode::Normal | InputMode::Locked => {
                     if session_is_mirrored || !self.multiple_users_exist_in_session {
-                        Some(self.style.colors.frame_selected.base)
+                        Some((self.style.colors.frame_selected.base, 3))
                     } else {
                         let colors = client_id_to_colors(
                             client_id,
                             self.style.colors.multiplayer_user_colors,
                         );
-                        colors.map(|colors| colors.0)
+                        colors.map(|colors| (colors.0, 3))
                     }
                 },
-                _ => Some(self.style.colors.frame_highlight.base),
+                _ => Some((self.style.colors.frame_highlight.base, 3)),
             }
+        } else if self
+            .mouse_is_hovering_over_pane_for_clients
+            .contains(&client_id)
+        {
+            Some((self.style.colors.frame_highlight.base, 1))
         } else {
-            self.style.colors.frame_unselected.map(|frame| frame.base)
+            self.style
+                .colors
+                .frame_unselected
+                .map(|frame| (frame.base, 0))
         }
     }
 }

zellij-server/src/unit/screen_tests.rs

@@ -19,9 +19,11 @@ use zellij_utils::input::layout::{
     FloatingPaneLayout, Layout, PluginAlias, PluginUserConfiguration, Run, RunPlugin,
     RunPluginLocation, RunPluginOrAlias, SplitDirection, SplitSize, TiledPaneLayout,
 };
+use zellij_utils::input::mouse::MouseEvent;
 use zellij_utils::input::options::Options;
 use zellij_utils::ipc::IpcReceiverWithContext;
 use zellij_utils::pane_size::{Size, SizeInPixels};
+use zellij_utils::position::Position;
 
 use crate::background_jobs::BackgroundJob;
 use crate::pty_writer::PtyWriteInstruction;
@@ -243,7 +245,7 @@ impl ServerOsApi for FakeInputOutput {
     }
 }
 
-fn create_new_screen(size: Size) -> Screen {
+fn create_new_screen(size: Size, advanced_mouse_actions: bool) -> Screen {
     let mut bus: Bus<ScreenInstruction> = Bus::empty();
     let fake_os_input = FakeInputOutput::default();
     bus.os_input = Some(Box::new(fake_os_input));
@@ -293,6 +295,7 @@ fn create_new_screen(size: Size) -> Screen {
         explicitly_disable_kitty_keyboard_protocol,
         stacked_resize,
         None,
+        advanced_mouse_actions,
     );
     screen
 }
@@ -316,6 +319,7 @@ struct MockScreen {
     pub config_options: Options,
     pub session_metadata: SessionMetaData,
     pub config: Config,
+    advanced_mouse_actions: bool,
     last_opened_tab_index: Option<usize>,
 }
 
@@ -325,7 +329,8 @@ impl MockScreen {
         initial_layout: Option<TiledPaneLayout>,
         initial_floating_panes_layout: Vec<FloatingPaneLayout>,
     ) -> std::thread::JoinHandle<()> {
-        let config = self.config.clone();
+        let mut config = self.config.clone();
+        config.options.advanced_mouse_actions = Some(self.advanced_mouse_actions);
         let client_attributes = self.client_attributes.clone();
         let screen_bus = Bus::new(
             vec![self.screen_receiver.take().unwrap()],
@@ -626,8 +631,12 @@ impl MockScreen {
             session_metadata,
             last_opened_tab_index: None,
             config: Config::default(),
+            advanced_mouse_actions: true,
         }
     }
+    pub fn set_advanced_hover_effects(&mut self, advanced_mouse_actions: bool) {
+        self.advanced_mouse_actions = advanced_mouse_actions;
+    }
 }
 
 macro_rules! log_actions_in_thread {
@@ -682,7 +691,7 @@ fn open_new_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 0);
     new_tab(&mut screen, 2, 1);
@@ -701,7 +710,7 @@ pub fn switch_to_prev_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -720,7 +729,7 @@ pub fn switch_to_next_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -740,7 +749,7 @@ pub fn switch_to_tab_name() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -774,7 +783,7 @@ pub fn close_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -794,7 +803,7 @@ pub fn close_the_middle_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -816,7 +825,7 @@ fn move_focus_left_at_left_screen_edge_changes_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -848,10 +857,13 @@ fn basic_move_of_active_tab_to_left() {
 }
 
 fn create_fixed_size_screen() -> Screen {
-    create_new_screen(Size {
+    create_new_screen(
+        Size {
             cols: 121,
             rows: 20,
-    })
+        },
+        true,
+    )
 }
 
 #[test]
@@ -981,7 +993,7 @@ fn move_focus_right_at_right_screen_edge_changes_tab() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -1002,7 +1014,7 @@ pub fn toggle_to_previous_tab_simple() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(position_and_size);
+    let mut screen = create_new_screen(position_and_size, true);
 
     new_tab(&mut screen, 1, 1);
     new_tab(&mut screen, 2, 2);
@@ -1030,7 +1042,7 @@ pub fn toggle_to_previous_tab_create_tabs_only() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(position_and_size);
+    let mut screen = create_new_screen(position_and_size, true);
 
     new_tab(&mut screen, 1, 0);
     new_tab(&mut screen, 2, 1);
@@ -1080,7 +1092,7 @@ pub fn toggle_to_previous_tab_delete() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(position_and_size);
+    let mut screen = create_new_screen(position_and_size, true);
 
     new_tab(&mut screen, 1, 0);
     new_tab(&mut screen, 2, 1);
@@ -1176,7 +1188,7 @@ fn switch_to_tab_with_fullscreen() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 1);
     {
@@ -1212,7 +1224,7 @@ fn update_screen_pixel_dimensions() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
     let initial_pixel_dimensions = screen.pixel_dimensions;
     screen.update_pixel_dimensions(PixelDimensions {
         character_cell_size: Some(SizeInPixels {
@@ -1291,7 +1303,7 @@ fn attach_after_first_tab_closed() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 0);
     {
@@ -1314,7 +1326,7 @@ fn open_new_floating_pane_with_custom_coordinates() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 0);
     let active_tab = screen.get_active_tab_mut(1).unwrap();
@@ -1349,7 +1361,7 @@ fn open_new_floating_pane_with_custom_coordinates_exceeding_viewport() {
         cols: 121,
         rows: 20,
     };
-    let mut screen = create_new_screen(size);
+    let mut screen = create_new_screen(size, true);
 
     new_tab(&mut screen, 1, 0);
     let active_tab = screen.get_active_tab_mut(1).unwrap();
@@ -1378,6 +1390,257 @@ fn open_new_floating_pane_with_custom_coordinates_exceeding_viewport() {
     assert_eq!(active_pane.cols(), 10, "columns set properly");
 }
 
+#[test]
+pub fn mouse_hover_effect() {
+    let size = Size {
+        cols: 130,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut initial_layout = TiledPaneLayout::default();
+    initial_layout.children_split_direction = SplitDirection::Vertical;
+    initial_layout.children = vec![TiledPaneLayout::default(), TiledPaneLayout::default()];
+    let mut mock_screen = MockScreen::new(size);
+    let screen_thread = mock_screen.run(Some(initial_layout), vec![]);
+    let received_server_instructions = Arc::new(Mutex::new(vec![]));
+    let server_receiver = mock_screen.server_receiver.take().unwrap();
+    let server_thread = log_actions_in_thread!(
+        received_server_instructions,
+        ServerInstruction::KillSession,
+        server_receiver
+    );
+    let hover_mouse_event_1 = MouseEvent::new_buttonless_motion(Position::new(5, 70));
+    let _ = mock_screen.to_screen.send(ScreenInstruction::MouseEvent(
+        hover_mouse_event_1,
+        client_id,
+    ));
+    std::thread::sleep(std::time::Duration::from_millis(100));
+    mock_screen.teardown(vec![server_thread, screen_thread]);
+    let snapshots = take_snapshots_and_cursor_coordinates_from_render_events(
+        received_server_instructions.lock().unwrap().iter(),
+        size,
+    );
+    for (_cursor_coordinates, snapshot) in snapshots {
+        assert_snapshot!(format!("{}", snapshot));
+    }
+}
+
+#[test]
+pub fn disabled_mouse_hover_effect() {
+    let size = Size {
+        cols: 130,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut initial_layout = TiledPaneLayout::default();
+    initial_layout.children_split_direction = SplitDirection::Vertical;
+    initial_layout.children = vec![TiledPaneLayout::default(), TiledPaneLayout::default()];
+    let mut mock_screen = MockScreen::new(size);
+    mock_screen.set_advanced_hover_effects(false);
+    let screen_thread = mock_screen.run(Some(initial_layout), vec![]);
+    let received_server_instructions = Arc::new(Mutex::new(vec![]));
+    let server_receiver = mock_screen.server_receiver.take().unwrap();
+    let server_thread = log_actions_in_thread!(
+        received_server_instructions,
+        ServerInstruction::KillSession,
+        server_receiver
+    );
+    let hover_mouse_event_1 = MouseEvent::new_buttonless_motion(Position::new(5, 70));
+    let _ = mock_screen.to_screen.send(ScreenInstruction::MouseEvent(
+        hover_mouse_event_1,
+        client_id,
+    ));
+    std::thread::sleep(std::time::Duration::from_millis(100));
+    mock_screen.teardown(vec![server_thread, screen_thread]);
+    let snapshots = take_snapshots_and_cursor_coordinates_from_render_events(
+        received_server_instructions.lock().unwrap().iter(),
+        size,
+    );
+    for (_cursor_coordinates, snapshot) in snapshots {
+        assert_snapshot!(format!("{}", snapshot));
+    }
+}
+
+#[test]
+fn group_panes_with_mouse() {
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut screen = create_new_screen(size, true);
+
+    new_tab(&mut screen, 1, 0);
+    new_tab(&mut screen, 2, 1);
+    screen.handle_mouse_event(
+        MouseEvent::new_left_press_with_alt_event(Position::new(2, 80)),
+        client_id,
+    );
+
+    assert_eq!(
+        screen.current_pane_group.borrow().get(&client_id),
+        Some(&vec![PaneId::Terminal(2)]),
+        "Pane Id added to client's pane group"
+    );
+
+    screen.handle_mouse_event(
+        MouseEvent::new_left_press_with_alt_event(Position::new(2, 80)),
+        client_id,
+    );
+
+    assert_eq!(
+        screen.current_pane_group.borrow().get(&client_id),
+        Some(&vec![]),
+        "Pane Id removed from client's pane group"
+    );
+}
+
+#[test]
+fn group_panes_with_keyboard() {
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut screen = create_new_screen(size, true);
+
+    new_tab(&mut screen, 1, 0);
+    new_tab(&mut screen, 2, 1);
+    let _ = screen.toggle_pane_in_group(client_id);
+
+    assert_eq!(
+        screen.current_pane_group.borrow().get(&client_id),
+        Some(&vec![PaneId::Terminal(2)]),
+        "Pane Id added to client's pane group"
+    );
+
+    let _ = screen.toggle_pane_in_group(client_id);
+
+    assert_eq!(
+        screen.current_pane_group.borrow().get(&client_id),
+        Some(&vec![]),
+        "Pane Id removed from client's pane group"
+    );
+}
+
+#[test]
+fn group_panes_following_focus() {
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut screen = create_new_screen(size, true);
+
+    new_tab(&mut screen, 1, 0);
+
+    {
+        let active_tab = screen.get_active_tab_mut(client_id).unwrap();
+        let should_float = Some(false);
+        for i in 2..5 {
+            active_tab
+                .new_pane(
+                    PaneId::Terminal(i),
+                    None,
+                    should_float,
+                    None,
+                    None,
+                    false,
+                    Some(client_id),
+                )
+                .unwrap();
+        }
+    }
+    {
+        screen.toggle_group_marking(client_id).unwrap();
+        screen
+            .get_active_tab_mut(client_id)
+            .unwrap()
+            .move_focus_up(client_id)
+            .unwrap();
+        screen.add_active_pane_to_group_if_marking(&client_id);
+        assert_eq!(
+            screen.current_pane_group.borrow().get(&client_id),
+            Some(&vec![PaneId::Terminal(4), PaneId::Terminal(3)]),
+            "Pane Id of focused pane and newly focused pane above added to pane group"
+        );
+    }
+    {
+        let _ = screen.toggle_group_marking(client_id);
+        screen
+            .get_active_tab_mut(client_id)
+            .unwrap()
+            .move_focus_up(client_id)
+            .unwrap();
+        let _ = screen.add_active_pane_to_group_if_marking(&client_id);
+        assert_eq!(screen.current_pane_group.borrow().get(&client_id), Some(&vec![PaneId::Terminal(4), PaneId::Terminal(3)]), "Pane Id of newly focused pane not added to group after the group marking was toggled off");
+    }
+}
+
+#[test]
+fn break_group_with_mouse() {
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let client_id = 1;
+    let mut screen = create_new_screen(size, true);
+
+    new_tab(&mut screen, 1, 0);
+
+    {
+        let active_tab = screen.get_active_tab_mut(client_id).unwrap();
+        let should_float = Some(false);
+        for i in 2..5 {
+            active_tab
+                .new_pane(
+                    PaneId::Terminal(i),
+                    None,
+                    should_float,
+                    None,
+                    None,
+                    false,
+                    Some(client_id),
+                )
+                .unwrap();
+        }
+    }
+    {
+        screen.toggle_group_marking(client_id).unwrap();
+        screen
+            .get_active_tab_mut(client_id)
+            .unwrap()
+            .move_focus_up(client_id)
+            .unwrap();
+        screen.add_active_pane_to_group_if_marking(&client_id);
+        screen
+            .get_active_tab_mut(client_id)
+            .unwrap()
+            .move_focus_up(client_id)
+            .unwrap();
+        screen.add_active_pane_to_group_if_marking(&client_id);
+        assert_eq!(
+            screen.current_pane_group.borrow().get(&client_id),
+            Some(&vec![
+                PaneId::Terminal(4),
+                PaneId::Terminal(3),
+                PaneId::Terminal(2)
+            ]),
+            "Group contains 3 panes"
+        );
+    }
+
+    screen.handle_mouse_event(
+        MouseEvent::new_right_press_with_alt_event(Position::new(2, 80)),
+        client_id,
+    );
+    assert_eq!(
+        screen.current_pane_group.borrow().get(&client_id),
+        Some(&vec![]),
+        "Group cleared by mouse event"
+    );
+}
+
 // Following are tests for sending CLI actions
 // these tests are only partially relevant to Screen
 // and are included here for two reasons:

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__disabled_mouse_hover_effect.snap

@@ -0,0 +1,24 @@
+---
+source: zellij-server/src/./unit/screen_tests.rs
+expression: "format!(\"{}\", snapshot)"
+---
+00 (C): ┌ Pane #1 ──────────────────────────────────────────────────────┐┌ Pane #2 ──────────────────────────────────────────────────────┐
+01 (C): │                                                               ││                                                               │
+02 (C): │                                                               ││                                                               │
+03 (C): │                                                               ││                                                               │
+04 (C): │                                                               ││                                                               │
+05 (C): │                                                               ││                                                               │
+06 (C): │                                                               ││                                                               │
+07 (C): │                                                               ││                                                               │
+08 (C): │                                                               ││                                                               │
+09 (C): │                                                               ││                                                               │
+10 (C): │                                                               ││                                                               │
+11 (C): │                                                               ││                                                               │
+12 (C): │                                                               ││                                                               │
+13 (C): │                                                               ││                                                               │
+14 (C): │                                                               ││                                                               │
+15 (C): │                                                               ││                                                               │
+16 (C): │                                                               ││                                                               │
+17 (C): │                                                               ││                                                               │
+18 (C): │                                                               ││                                                               │
+19 (C): └───────────────────────────────────────────────────────────────┘└───────────────────────────────────────────────────────────────┘

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__mouse_hover_effect-2.snap

@@ -0,0 +1,24 @@
+---
+source: zellij-server/src/./unit/screen_tests.rs
+expression: "format!(\"{}\", snapshot)"
+---
+00 (C): ┌ Pane #1 ──────────────────────────────────────────────────────┐┌ Pane #2 ──────────────────────────────────────────────────────┐
+01 (C): │                                                               ││                                                               │
+02 (C): │                                                               ││                                                               │
+03 (C): │                                                               ││                                                               │
+04 (C): │                                                               ││                                                               │
+05 (C): │                                                               ││                                                               │
+06 (C): │                                                               ││                                                               │
+07 (C): │                                                               ││                                                               │
+08 (C): │                                                               ││                                                               │
+09 (C): │                                                               ││                                                               │
+10 (C): │                                                               ││                                                               │
+11 (C): │                                                               ││                                                               │
+12 (C): │                                                               ││                                                               │
+13 (C): │                                                               ││                                                               │
+14 (C): │                                                               ││                                                               │
+15 (C): │                                                               ││                                                               │
+16 (C): │                                                               ││                                                               │
+17 (C): │                                                               ││                                                               │
+18 (C): │                                                               ││                                                               │
+19 (C): └───────────────────────────────────────────────────────────────┘└ Alt <Click> - group, Alt <Right-Click> - ungroup all ─────────┘

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__mouse_hover_effect.snap

@@ -0,0 +1,24 @@
+---
+source: zellij-server/src/./unit/screen_tests.rs
+expression: "format!(\"{}\", snapshot)"
+---
+00 (C): ┌ Pane #1 ──────────────────────────────────────────────────────┐┌ Pane #2 ──────────────────────────────────────────────────────┐
+01 (C): │                                                               ││                                                               │
+02 (C): │                                                               ││                                                               │
+03 (C): │                                                               ││                                                               │
+04 (C): │                                                               ││                                                               │
+05 (C): │                                                               ││                                                               │
+06 (C): │                                                               ││                                                               │
+07 (C): │                                                               ││                                                               │
+08 (C): │                                                               ││                                                               │
+09 (C): │                                                               ││                                                               │
+10 (C): │                                                               ││                                                               │
+11 (C): │                                                               ││                                                               │
+12 (C): │                                                               ││                                                               │
+13 (C): │                                                               ││                                                               │
+14 (C): │                                                               ││                                                               │
+15 (C): │                                                               ││                                                               │
+16 (C): │                                                               ││                                                               │
+17 (C): │                                                               ││                                                               │
+18 (C): │                                                               ││                                                               │
+19 (C): └───────────────────────────────────────────────────────────────┘└───────────────────────────────────────────────────────────────┘

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__send_cli_stack_panes_action-2.snap

@@ -1,16 +1,14 @@
 ---
 source: zellij-server/src/./unit/screen_tests.rs
-assertion_line: 3687
 expression: "format!(\"{}\", snapshot)"
 ---
 00 (C): ┌ Pane #1 ─────┐┌ Pane #2 ─────────────────────────────────────┐┌ Pane #5 ─────┐
-01 (C): │              │┌ Pane #3 ─────────────────────────────────────┐│              │
+01 (C): │              ││                                              ││              │
-02 (C): │              │┌ Pane #4 ─────────────────────────────────────┐│              │
+02 (C): │              ││                                              ││              │
 03 (C): │              ││                                              ││              │
 04 (C): │              ││                                              ││              │
 05 (C): │              ││                                              ││              │
 06 (C): │              ││                                              ││              │
-07 (C): │              ││                                              ││              │
+07 (C): │              │└──────────────────────────────────────────────┘│              │
-08 (C): │              ││                                              ││              │
+08 (C): │              │└ Pane #3 ─────────────────────────────────────┘│              │
-09 (C): └──────────────┘└──────────────────────────────────────────────┘└──────────────┘
+09 (C): └──────────────┘└ Pane #4 ─────────────────────────────────────┘└──────────────┘
-

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__send_cli_toggle_active_tab_sync_action.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-server/src/./unit/screen_tests.rs
-assertion_line: 2183
 expression: "format!(\"{:?}\", *received_pty_instructions.lock().unwrap())"
 ---
-[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([102, 111, 111], 0), Write([102, 111, 111], 1), ApplyCachedResizes, Exit]
+[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ApplyCachedResizes, ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 58, 18, None, None), ResizePty(1, 59, 18, None, None), ResizePty(0, 59, 18, None, None), ResizePty(1, 58, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([102, 111, 111], 0), Write([102, 111, 111], 1), ApplyCachedResizes, Exit]

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__send_cli_write_action_to_screen.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-server/src/./unit/screen_tests.rs
-assertion_line: 1423
 expression: "format!(\"{:?}\", *received_pty_instructions.lock().unwrap())"
 ---
-[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([102, 111, 111], 0), ApplyCachedResizes, Exit]
+[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([102, 111, 111], 0), ApplyCachedResizes, Exit]

zellij-server/src/unit/snapshots/zellij_server__screen__screen_tests__send_cli_write_chars_action_to_screen.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-server/src/./unit/screen_tests.rs
-assertion_line: 1397
 expression: "format!(\"{:?}\", *received_pty_instructions.lock().unwrap())"
 ---
-[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([105, 110, 112, 117, 116, 32, 102, 114, 111, 109, 32, 116, 104, 101, 32, 99, 108, 105], 0), ApplyCachedResizes, Exit]
+[StartCachingResizes, ApplyCachedResizes, StartCachingResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ResizePty(0, 119, 18, None, None), ApplyCachedResizes, ApplyCachedResizes, ApplyCachedResizes, StartCachingResizes, ApplyCachedResizes, StartCachingResizes, Write([105, 110, 112, 117, 116, 32, 102, 114, 111, 109, 32, 116, 104, 101, 32, 99, 108, 105], 0), ApplyCachedResizes, Exit]

zellij-tile/src/shim.rs

@@ -1273,6 +1273,46 @@ pub fn change_floating_panes_coordinates(
     unsafe { host_run_plugin_command() };
 }
 
+pub fn group_and_ungroup_panes(pane_ids_to_group: Vec<PaneId>, pane_ids_to_ungroup: Vec<PaneId>) {
+    let plugin_command =
+        PluginCommand::GroupAndUngroupPanes(pane_ids_to_group, pane_ids_to_ungroup);
+    let protobuf_plugin_command: ProtobufPluginCommand = plugin_command.try_into().unwrap();
+    object_to_stdout(&protobuf_plugin_command.encode_to_vec());
+    unsafe { host_run_plugin_command() };
+}
+
+pub fn highlight_and_unhighlight_panes(
+    pane_ids_to_highlight: Vec<PaneId>,
+    pane_ids_to_unhighlight: Vec<PaneId>,
+) {
+    let plugin_command =
+        PluginCommand::HighlightAndUnhighlightPanes(pane_ids_to_highlight, pane_ids_to_unhighlight);
+    let protobuf_plugin_command: ProtobufPluginCommand = plugin_command.try_into().unwrap();
+    object_to_stdout(&protobuf_plugin_command.encode_to_vec());
+    unsafe { host_run_plugin_command() };
+}
+
+pub fn close_multiple_panes(pane_ids: Vec<PaneId>) {
+    let plugin_command = PluginCommand::CloseMultiplePanes(pane_ids);
+    let protobuf_plugin_command: ProtobufPluginCommand = plugin_command.try_into().unwrap();
+    object_to_stdout(&protobuf_plugin_command.encode_to_vec());
+    unsafe { host_run_plugin_command() };
+}
+
+pub fn float_multiple_panes(pane_ids: Vec<PaneId>) {
+    let plugin_command = PluginCommand::FloatMultiplePanes(pane_ids);
+    let protobuf_plugin_command: ProtobufPluginCommand = plugin_command.try_into().unwrap();
+    object_to_stdout(&protobuf_plugin_command.encode_to_vec());
+    unsafe { host_run_plugin_command() };
+}
+
+pub fn embed_multiple_panes(pane_ids: Vec<PaneId>) {
+    let plugin_command = PluginCommand::EmbedMultiplePanes(pane_ids);
+    let protobuf_plugin_command: ProtobufPluginCommand = plugin_command.try_into().unwrap();
+    object_to_stdout(&protobuf_plugin_command.encode_to_vec());
+    unsafe { host_run_plugin_command() };
+}
+
 // Utility Functions
 
 #[allow(unused)]

zellij-tile/src/ui_components/text.rs

@@ -84,14 +84,14 @@ impl Text {
 
         let mut prefix = "".to_owned();
 
-        if self.opaque {
-            prefix = format!("z{}", prefix);
-        }
-
         if self.selected {
             prefix = format!("x{}", prefix);
         }
 
+        if self.opaque {
+            prefix = format!("z{}", prefix);
+        }
+
         format!("{}{}{}", prefix, indices, text)
     }
     pub fn len(&self) -> usize {

zellij-utils/assets/config/default.kdl

@@ -181,6 +181,14 @@ keybinds {
         bind "Alt -" { Resize "Decrease"; }
         bind "Alt [" { PreviousSwapLayout; }
         bind "Alt ]" { NextSwapLayout; }
+        bind "Alt m" {
+            LaunchOrFocusPlugin "zellij:multiple-select" {
+                floating true
+                move_to_focused_tab true
+            }
+        }
+        bind "Alt p" { TogglePaneInGroup; }
+        bind "Alt Shift p" { ToggleGroupMarking; }
     }
     shared_except "normal" "locked" {
         bind "Enter" "Esc" { SwitchToMode "Normal"; }
@@ -427,7 +435,7 @@ load_plugins {
 //
 // show_release_notes false
 
-// Whether to show startup tips on session start
+// Whether to enable mouse hover effects and pane grouping functionality
 // Default: true
 //
-// show_startup_tips false
+// advanced_mouse_actions false

zellij-utils/assets/prost/api.action.rs

@@ -3,10 +3,7 @@
 pub struct Action {
     #[prost(enumeration="ActionName", tag="1")]
     pub name: i32,
-    #[prost(
+    #[prost(oneof="action::OptionalPayload", tags="2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49")]
-        oneof = "action::OptionalPayload",
-        tags = "2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49"
-    )]
     pub optional_payload: ::core::option::Option<action::OptionalPayload>,
 }
 /// Nested message and enum types in `Action`.
@@ -476,6 +473,8 @@ pub enum ActionName {
     KeybindPipe = 84,
     TogglePanePinned = 85,
     MouseEvent = 86,
+    TogglePaneInGroup = 87,
+    ToggleGroupMarking = 88,
 }
 impl ActionName {
     /// String value of the enum field names used in the ProtoBuf definition.
@@ -568,6 +567,8 @@ impl ActionName {
             ActionName::KeybindPipe => "KeybindPipe",
             ActionName::TogglePanePinned => "TogglePanePinned",
             ActionName::MouseEvent => "MouseEvent",
+            ActionName::TogglePaneInGroup => "TogglePaneInGroup",
+            ActionName::ToggleGroupMarking => "ToggleGroupMarking",
         }
     }
     /// Creates an enum from field names used in the ProtoBuf definition.
@@ -657,6 +658,8 @@ impl ActionName {
             "KeybindPipe" => Some(Self::KeybindPipe),
             "TogglePanePinned" => Some(Self::TogglePanePinned),
             "MouseEvent" => Some(Self::MouseEvent),
+            "TogglePaneInGroup" => Some(Self::TogglePaneInGroup),
+            "ToggleGroupMarking" => Some(Self::ToggleGroupMarking),
             _ => None,
         }
     }

zellij-utils/assets/prost/api.event.rs

@@ -9,10 +9,7 @@ pub struct EventNameList {
 pub struct Event {
     #[prost(enumeration="EventType", tag="1")]
     pub name: i32,
-    #[prost(
+    #[prost(oneof="event::Payload", tags="2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26")]
-        oneof = "event::Payload",
-        tags = "2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26"
-    )]
     pub payload: ::core::option::Option<event::Payload>,
 }
 /// Nested message and enum types in `Event`.
@@ -264,9 +261,7 @@ pub struct MouseEventPayload {
     #[prost(enumeration="MouseEventName", tag="1")]
     pub mouse_event_name: i32,
     #[prost(oneof="mouse_event_payload::MouseEventPayload", tags="2, 3")]
-    pub mouse_event_payload: ::core::option::Option<
+    pub mouse_event_payload: ::core::option::Option<mouse_event_payload::MouseEventPayload>,
-        mouse_event_payload::MouseEventPayload,
-    >,
 }
 /// Nested message and enum types in `MouseEventPayload`.
 pub mod mouse_event_payload {
@@ -400,6 +395,16 @@ pub struct PaneInfo {
     pub plugin_url: ::core::option::Option<::prost::alloc::string::String>,
     #[prost(bool, tag="22")]
     pub is_selectable: bool,
+    #[prost(message, repeated, tag="23")]
+    pub index_in_pane_group: ::prost::alloc::vec::Vec<IndexInPaneGroup>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct IndexInPaneGroup {
+    #[prost(uint32, tag="1")]
+    pub client_id: u32,
+    #[prost(uint32, tag="2")]
+    pub index: u32,
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -456,6 +461,8 @@ pub struct ModeUpdatePayload {
     pub editor: ::core::option::Option<::prost::alloc::string::String>,
     #[prost(string, optional, tag="8")]
     pub shell: ::core::option::Option<::prost::alloc::string::String>,
+    #[prost(bool, optional, tag="9")]
+    pub currently_marking_pane_group: ::core::option::Option<bool>,
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -522,6 +529,7 @@ pub enum EventType {
     FailedToChangeHostFolder = 28,
     PastedText = 29,
     ConfigWasWrittenToDisk = 30,
+    BeforeClose = 31,
 }
 impl EventType {
     /// String value of the enum field names used in the ProtoBuf definition.
@@ -561,6 +569,7 @@ impl EventType {
             EventType::FailedToChangeHostFolder => "FailedToChangeHostFolder",
             EventType::PastedText => "PastedText",
             EventType::ConfigWasWrittenToDisk => "ConfigWasWrittenToDisk",
+            EventType::BeforeClose => "BeforeClose",
         }
     }
     /// Creates an enum from field names used in the ProtoBuf definition.
@@ -597,6 +606,7 @@ impl EventType {
             "FailedToChangeHostFolder" => Some(Self::FailedToChangeHostFolder),
             "PastedText" => Some(Self::PastedText),
             "ConfigWasWrittenToDisk" => Some(Self::ConfigWasWrittenToDisk),
+            "BeforeClose" => Some(Self::BeforeClose),
             _ => None,
         }
     }

zellij-utils/assets/prost/api.key.rs

@@ -10,17 +10,7 @@ pub struct Key {
 }
 /// Nested message and enum types in `Key`.
 pub mod key {
-    #[derive(
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
-        Clone,
-        Copy,
-        Debug,
-        PartialEq,
-        Eq,
-        Hash,
-        PartialOrd,
-        Ord,
-        ::prost::Enumeration
-    )]
     #[repr(i32)]
     pub enum KeyModifier {
         Ctrl = 0,
@@ -52,17 +42,7 @@ pub mod key {
             }
         }
     }
-    #[derive(
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
-        Clone,
-        Copy,
-        Debug,
-        PartialEq,
-        Eq,
-        Hash,
-        PartialOrd,
-        Ord,
-        ::prost::Enumeration
-    )]
     #[repr(i32)]
     pub enum NamedKey {
         PageDown = 0,
@@ -178,17 +158,7 @@ pub mod key {
             }
         }
     }
-    #[derive(
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
-        Clone,
-        Copy,
-        Debug,
-        PartialEq,
-        Eq,
-        Hash,
-        PartialOrd,
-        Ord,
-        ::prost::Enumeration
-    )]
     #[repr(i32)]
     pub enum Char {
         A = 0,

zellij-utils/assets/prost/api.plugin_command.rs

@@ -3,10 +3,7 @@
 pub struct PluginCommand {
     #[prost(enumeration="CommandName", tag="1")]
     pub name: i32,
-    #[prost(
+    #[prost(oneof="plugin_command::Payload", tags="2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106")]
-        oneof = "plugin_command::Payload",
-        tags = "2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101"
-    )]
     pub payload: ::core::option::Option<plugin_command::Payload>,
 }
 /// Nested message and enum types in `PluginCommand`.
@@ -139,9 +136,7 @@ pub mod plugin_command {
         #[prost(message, tag="72")]
         MovePaneWithPaneIdPayload(super::MovePaneWithPaneIdPayload),
         #[prost(message, tag="73")]
-        MovePaneWithPaneIdInDirectionPayload(
+        MovePaneWithPaneIdInDirectionPayload(super::MovePaneWithPaneIdInDirectionPayload),
-            super::MovePaneWithPaneIdInDirectionPayload,
-        ),
         #[prost(message, tag="74")]
         ClearScreenForPaneIdPayload(super::ClearScreenForPaneIdPayload),
         #[prost(message, tag="75")]
@@ -159,9 +154,7 @@ pub mod plugin_command {
         #[prost(message, tag="81")]
         TogglePaneIdFullscreenPayload(super::TogglePaneIdFullscreenPayload),
         #[prost(message, tag="82")]
-        TogglePaneEmbedOrEjectForPaneIdPayload(
+        TogglePaneEmbedOrEjectForPaneIdPayload(super::TogglePaneEmbedOrEjectForPaneIdPayload),
-            super::TogglePaneEmbedOrEjectForPaneIdPayload,
-        ),
         #[prost(message, tag="83")]
         CloseTabWithIndexPayload(super::CloseTabWithIndexPayload),
         #[prost(message, tag="84")]
@@ -181,37 +174,73 @@ pub mod plugin_command {
         #[prost(message, tag="91")]
         StackPanesPayload(super::StackPanesPayload),
         #[prost(message, tag="92")]
-        ChangeFloatingPanesCoordinatesPayload(
+        ChangeFloatingPanesCoordinatesPayload(super::ChangeFloatingPanesCoordinatesPayload),
-            super::ChangeFloatingPanesCoordinatesPayload,
-        ),
         #[prost(message, tag="93")]
         OpenCommandPaneNearPluginPayload(super::OpenCommandPaneNearPluginPayload),
         #[prost(message, tag="94")]
         OpenTerminalNearPluginPayload(super::OpenTerminalNearPluginPayload),
         #[prost(message, tag="95")]
-        OpenTerminalFloatingNearPluginPayload(
+        OpenTerminalFloatingNearPluginPayload(super::OpenTerminalFloatingNearPluginPayload),
-            super::OpenTerminalFloatingNearPluginPayload,
-        ),
         #[prost(message, tag="96")]
         OpenTerminalInPlaceOfPluginPayload(super::OpenTerminalInPlaceOfPluginPayload),
         #[prost(message, tag="97")]
-        OpenCommandPaneFloatingNearPluginPayload(
+        OpenCommandPaneFloatingNearPluginPayload(super::OpenCommandPaneFloatingNearPluginPayload),
-            super::OpenCommandPaneFloatingNearPluginPayload,
-        ),
         #[prost(message, tag="98")]
-        OpenCommandPaneInPlaceOfPluginPayload(
+        OpenCommandPaneInPlaceOfPluginPayload(super::OpenCommandPaneInPlaceOfPluginPayload),
-            super::OpenCommandPaneInPlaceOfPluginPayload,
-        ),
         #[prost(message, tag="99")]
         OpenFileNearPluginPayload(super::OpenFileNearPluginPayload),
         #[prost(message, tag="100")]
         OpenFileFloatingNearPluginPayload(super::OpenFileFloatingNearPluginPayload),
         #[prost(message, tag="101")]
         OpenFileInPlaceOfPluginPayload(super::OpenFileInPlaceOfPluginPayload),
+        #[prost(message, tag="102")]
+        GroupAndUngroupPanesPayload(super::GroupAndUngroupPanesPayload),
+        #[prost(message, tag="103")]
+        HighlightAndUnhighlightPanesPayload(super::HighlightAndUnhighlightPanesPayload),
+        #[prost(message, tag="104")]
+        CloseMultiplePanesPayload(super::CloseMultiplePanesPayload),
+        #[prost(message, tag="105")]
+        FloatMultiplePanesPayload(super::FloatMultiplePanesPayload),
+        #[prost(message, tag="106")]
+        EmbedMultiplePanesPayload(super::EmbedMultiplePanesPayload),
     }
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
+pub struct EmbedMultiplePanesPayload {
+    #[prost(message, repeated, tag="1")]
+    pub pane_ids: ::prost::alloc::vec::Vec<PaneId>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct FloatMultiplePanesPayload {
+    #[prost(message, repeated, tag="1")]
+    pub pane_ids: ::prost::alloc::vec::Vec<PaneId>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct CloseMultiplePanesPayload {
+    #[prost(message, repeated, tag="1")]
+    pub pane_ids: ::prost::alloc::vec::Vec<PaneId>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HighlightAndUnhighlightPanesPayload {
+    #[prost(message, repeated, tag="1")]
+    pub pane_ids_to_highlight: ::prost::alloc::vec::Vec<PaneId>,
+    #[prost(message, repeated, tag="2")]
+    pub pane_ids_to_unhighlight: ::prost::alloc::vec::Vec<PaneId>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GroupAndUngroupPanesPayload {
+    #[prost(message, repeated, tag="1")]
+    pub pane_ids_to_group: ::prost::alloc::vec::Vec<PaneId>,
+    #[prost(message, repeated, tag="2")]
+    pub pane_ids_to_ungroup: ::prost::alloc::vec::Vec<PaneId>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
 pub struct OpenFileInPlaceOfPluginPayload {
     #[prost(message, optional, tag="1")]
     pub file_to_open: ::core::option::Option<super::file::File>,
@@ -304,9 +333,7 @@ pub struct OpenCommandPaneNearPluginPayload {
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct ChangeFloatingPanesCoordinatesPayload {
     #[prost(message, repeated, tag="1")]
-    pub pane_ids_and_floating_panes_coordinates: ::prost::alloc::vec::Vec<
+    pub pane_ids_and_floating_panes_coordinates: ::prost::alloc::vec::Vec<PaneIdAndFloatingPaneCoordinates>,
-        PaneIdAndFloatingPaneCoordinates,
-    >,
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -605,11 +632,7 @@ pub struct SwitchSessionPayload {
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct RequestPluginPermissionPayload {
-    #[prost(
+    #[prost(enumeration="super::plugin_permission::PermissionType", repeated, tag="1")]
-        enumeration = "super::plugin_permission::PermissionType",
-        repeated,
-        tag = "1"
-    )]
     pub permissions: ::prost::alloc::vec::Vec<i32>,
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
@@ -891,6 +914,11 @@ pub enum CommandName {
     OpenFileNearPlugin = 124,
     OpenFileFloatingNearPlugin = 125,
     OpenFileInPlaceOfPlugin = 126,
+    GroupAndUngroupPanes = 127,
+    HighlightAndUnhighlightPanes = 128,
+    CloseMultiplePanes = 129,
+    FloatMultiplePanes = 130,
+    EmbedMultiplePanes = 131,
 }
 impl CommandName {
     /// String value of the enum field names used in the ProtoBuf definition.
@@ -1005,9 +1033,7 @@ impl CommandName {
             CommandName::PageScrollUpInPaneId => "PageScrollUpInPaneId",
             CommandName::PageScrollDownInPaneId => "PageScrollDownInPaneId",
             CommandName::TogglePaneIdFullscreen => "TogglePaneIdFullscreen",
-            CommandName::TogglePaneEmbedOrEjectForPaneId => {
+            CommandName::TogglePaneEmbedOrEjectForPaneId => "TogglePaneEmbedOrEjectForPaneId",
-                "TogglePaneEmbedOrEjectForPaneId"
-            }
             CommandName::CloseTabWithIndex => "CloseTabWithIndex",
             CommandName::BreakPanesToNewTab => "BreakPanesToNewTab",
             CommandName::BreakPanesToTabWithIndex => "BreakPanesToTabWithIndex",
@@ -1018,24 +1044,21 @@ impl CommandName {
             CommandName::ChangeHostFolder => "ChangeHostFolder",
             CommandName::SetFloatingPanePinned => "SetFloatingPanePinned",
             CommandName::StackPanes => "StackPanes",
-            CommandName::ChangeFloatingPanesCoordinates => {
+            CommandName::ChangeFloatingPanesCoordinates => "ChangeFloatingPanesCoordinates",
-                "ChangeFloatingPanesCoordinates"
-            }
             CommandName::OpenCommandPaneNearPlugin => "OpenCommandPaneNearPlugin",
             CommandName::OpenTerminalNearPlugin => "OpenTerminalNearPlugin",
-            CommandName::OpenTerminalFloatingNearPlugin => {
+            CommandName::OpenTerminalFloatingNearPlugin => "OpenTerminalFloatingNearPlugin",
-                "OpenTerminalFloatingNearPlugin"
-            }
             CommandName::OpenTerminalInPlaceOfPlugin => "OpenTerminalInPlaceOfPlugin",
-            CommandName::OpenCommandPaneFloatingNearPlugin => {
+            CommandName::OpenCommandPaneFloatingNearPlugin => "OpenCommandPaneFloatingNearPlugin",
-                "OpenCommandPaneFloatingNearPlugin"
+            CommandName::OpenCommandPaneInPlaceOfPlugin => "OpenCommandPaneInPlaceOfPlugin",
-            }
-            CommandName::OpenCommandPaneInPlaceOfPlugin => {
-                "OpenCommandPaneInPlaceOfPlugin"
-            }
             CommandName::OpenFileNearPlugin => "OpenFileNearPlugin",
             CommandName::OpenFileFloatingNearPlugin => "OpenFileFloatingNearPlugin",
             CommandName::OpenFileInPlaceOfPlugin => "OpenFileInPlaceOfPlugin",
+            CommandName::GroupAndUngroupPanes => "GroupAndUngroupPanes",
+            CommandName::HighlightAndUnhighlightPanes => "HighlightAndUnhighlightPanes",
+            CommandName::CloseMultiplePanes => "CloseMultiplePanes",
+            CommandName::FloatMultiplePanes => "FloatMultiplePanes",
+            CommandName::EmbedMultiplePanes => "EmbedMultiplePanes",
         }
     }
     /// Creates an enum from field names used in the ProtoBuf definition.
@@ -1147,9 +1170,7 @@ impl CommandName {
             "PageScrollUpInPaneId" => Some(Self::PageScrollUpInPaneId),
             "PageScrollDownInPaneId" => Some(Self::PageScrollDownInPaneId),
             "TogglePaneIdFullscreen" => Some(Self::TogglePaneIdFullscreen),
-            "TogglePaneEmbedOrEjectForPaneId" => {
+            "TogglePaneEmbedOrEjectForPaneId" => Some(Self::TogglePaneEmbedOrEjectForPaneId),
-                Some(Self::TogglePaneEmbedOrEjectForPaneId)
-            }
             "CloseTabWithIndex" => Some(Self::CloseTabWithIndex),
             "BreakPanesToNewTab" => Some(Self::BreakPanesToNewTab),
             "BreakPanesToTabWithIndex" => Some(Self::BreakPanesToTabWithIndex),
@@ -1160,24 +1181,21 @@ impl CommandName {
             "ChangeHostFolder" => Some(Self::ChangeHostFolder),
             "SetFloatingPanePinned" => Some(Self::SetFloatingPanePinned),
             "StackPanes" => Some(Self::StackPanes),
-            "ChangeFloatingPanesCoordinates" => {
+            "ChangeFloatingPanesCoordinates" => Some(Self::ChangeFloatingPanesCoordinates),
-                Some(Self::ChangeFloatingPanesCoordinates)
-            }
             "OpenCommandPaneNearPlugin" => Some(Self::OpenCommandPaneNearPlugin),
             "OpenTerminalNearPlugin" => Some(Self::OpenTerminalNearPlugin),
-            "OpenTerminalFloatingNearPlugin" => {
+            "OpenTerminalFloatingNearPlugin" => Some(Self::OpenTerminalFloatingNearPlugin),
-                Some(Self::OpenTerminalFloatingNearPlugin)
-            }
             "OpenTerminalInPlaceOfPlugin" => Some(Self::OpenTerminalInPlaceOfPlugin),
-            "OpenCommandPaneFloatingNearPlugin" => {
+            "OpenCommandPaneFloatingNearPlugin" => Some(Self::OpenCommandPaneFloatingNearPlugin),
-                Some(Self::OpenCommandPaneFloatingNearPlugin)
+            "OpenCommandPaneInPlaceOfPlugin" => Some(Self::OpenCommandPaneInPlaceOfPlugin),
-            }
-            "OpenCommandPaneInPlaceOfPlugin" => {
-                Some(Self::OpenCommandPaneInPlaceOfPlugin)
-            }
             "OpenFileNearPlugin" => Some(Self::OpenFileNearPlugin),
             "OpenFileFloatingNearPlugin" => Some(Self::OpenFileFloatingNearPlugin),
             "OpenFileInPlaceOfPlugin" => Some(Self::OpenFileInPlaceOfPlugin),
+            "GroupAndUngroupPanes" => Some(Self::GroupAndUngroupPanes),
+            "HighlightAndUnhighlightPanes" => Some(Self::HighlightAndUnhighlightPanes),
+            "CloseMultiplePanes" => Some(Self::CloseMultiplePanes),
+            "FloatMultiplePanes" => Some(Self::FloatMultiplePanes),
+            "EmbedMultiplePanes" => Some(Self::EmbedMultiplePanes),
             _ => None,
         }
     }

zellij-utils/assets/prost/api.plugin_ids.rs

@@ -7,6 +7,8 @@ pub struct PluginIds {
     pub zellij_pid: i32,
     #[prost(string, tag="3")]
     pub initial_cwd: ::prost::alloc::string::String,
+    #[prost(uint32, tag="4")]
+    pub client_id: u32,
 }
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]

zellij-utils/assets/prost/api.plugin_permission.rs

@@ -28,9 +28,7 @@ impl PermissionType {
             PermissionType::WriteToStdin => "WriteToStdin",
             PermissionType::WebAccess => "WebAccess",
             PermissionType::ReadCliPipes => "ReadCliPipes",
-            PermissionType::MessageAndLaunchOtherPlugins => {
+            PermissionType::MessageAndLaunchOtherPlugins => "MessageAndLaunchOtherPlugins",
-                "MessageAndLaunchOtherPlugins"
-            }
             PermissionType::Reconfigure => "Reconfigure",
             PermissionType::FullHdAccess => "FullHdAccess",
         }

zellij-utils/assets/themes/catppuccin-latte.kdl

@@ -6,7 +6,7 @@ themes {
             emphasis_0 254 100 11
             emphasis_1 4 165 229
             emphasis_2 64 160 43
-            emphasis_3 234 118 203
+            emphasis_3 210 15 57
         }
         text_selected {
             base 76 79 105
@@ -27,7 +27,7 @@ themes {
         ribbon_unselected {
             base 220 224 232
             background 92 95 119
-            emphasis_0 210 15 57
+            emphasis_0 234 118 203
             emphasis_1 76 79 105
             emphasis_2 30 102 245
             emphasis_3 234 118 203
@@ -83,8 +83,8 @@ themes {
         frame_highlight {
             base 254 100 11
             background 0
-            emphasis_0 254 100 11
+            emphasis_0 210 15 57
-            emphasis_1 254 100 11
+            emphasis_1 136 57 239
             emphasis_2 254 100 11
             emphasis_3 254 100 11
         }

zellij-utils/src/consts.rs

@@ -131,6 +131,7 @@ mod not_wasm {
             add_plugin!(assets, "configuration.wasm");
             add_plugin!(assets, "plugin-manager.wasm");
             add_plugin!(assets, "about.wasm");
+            add_plugin!(assets, "multiple-select.wasm");
             assets
         };
     }

zellij-utils/src/data.rs

@@ -494,6 +494,10 @@ impl KeyWithModifier {
     pub fn is_key_with_super_modifier(&self, key: BareKey) -> bool {
         self.bare_key == key && self.key_modifiers.contains(&KeyModifier::Super)
     }
+    pub fn is_cancel_key(&self) -> bool {
+        // self.bare_key == BareKey::Esc || self.is_key_with_ctrl_modifier(BareKey::Char('c'))
+        self.bare_key == BareKey::Esc
+    }
     #[cfg(not(target_family = "wasm"))]
     pub fn to_termwiz_modifiers(&self) -> Modifiers {
         let mut modifiers = Modifiers::empty();
@@ -933,6 +937,7 @@ pub enum Event {
     FailedToChangeHostFolder(Option<String>), // String -> the error we got when changing
     PastedText(String),
     ConfigWasWrittenToDisk,
+    BeforeClose,
 }
 
 #[derive(
@@ -1274,8 +1279,8 @@ pub const DEFAULT_STYLES: Styling = Styling {
     },
     frame_highlight: StyleDeclaration {
         base: PaletteColor::EightBit(default_colors::ORANGE),
-        emphasis_0: PaletteColor::EightBit(default_colors::GREEN),
+        emphasis_0: PaletteColor::EightBit(default_colors::MAGENTA),
-        emphasis_1: PaletteColor::EightBit(default_colors::GREEN),
+        emphasis_1: PaletteColor::EightBit(default_colors::PURPLE),
         emphasis_2: PaletteColor::EightBit(default_colors::GREEN),
         emphasis_3: PaletteColor::EightBit(default_colors::GREEN),
         background: PaletteColor::EightBit(default_colors::GREEN),
@@ -1432,8 +1437,8 @@ impl From<Palette> for Styling {
             },
             frame_highlight: StyleDeclaration {
                 base: palette.orange,
-                emphasis_0: palette.orange,
+                emphasis_0: palette.magenta,
-                emphasis_1: palette.orange,
+                emphasis_1: palette.purple,
                 emphasis_2: palette.orange,
                 emphasis_3: palette.orange,
                 background: Default::default(),
@@ -1508,6 +1513,7 @@ pub struct ModeInfo {
     pub session_name: Option<String>,
     pub editor: Option<PathBuf>,
     pub shell: Option<PathBuf>,
+    pub currently_marking_pane_group: Option<bool>,
 }
 
 impl ModeInfo {
@@ -1733,6 +1739,9 @@ pub struct PaneInfo {
     /// Unselectable panes are often used for UI elements that do not have direct user interaction
     /// (eg. the default `status-bar` or `tab-bar`).
     pub is_selectable: bool,
+    /// Grouped panes (usually through an explicit user action) that are staged for a bulk action
+    /// the index is kept track of in order to preserve the pane group order
+    pub index_in_pane_group: BTreeMap<ClientId, usize>,
 }
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
 pub struct ClientInfo {
@@ -1763,6 +1772,7 @@ pub struct PluginIds {
     pub plugin_id: u32,
     pub zellij_pid: u32,
     pub initial_cwd: PathBuf,
+    pub client_id: ClientId,
 }
 
 /// Tag used to identify the plugin in layout and config kdl files
@@ -2307,4 +2317,10 @@ pub enum PluginCommand {
     OpenFileNearPlugin(FileToOpen, Context),
     OpenFileFloatingNearPlugin(FileToOpen, Option<FloatingPaneCoordinates>, Context),
     OpenFileInPlaceOfPlugin(FileToOpen, bool, Context), // bool -> close_plugin_after_replace
+    GroupAndUngroupPanes(Vec<PaneId>, Vec<PaneId>),     // panes to group, panes to ungroup
+    HighlightAndUnhighlightPanes(Vec<PaneId>, Vec<PaneId>), // panes to highlight, panes to
+    // unhighlight
+    CloseMultiplePanes(Vec<PaneId>),
+    FloatMultiplePanes(Vec<PaneId>),
+    EmbedMultiplePanes(Vec<PaneId>),
 }

zellij-utils/src/errors.rs

@@ -375,6 +375,13 @@ pub enum ScreenContext {
     SetFloatingPanePinned,
     StackPanes,
     ChangeFloatingPanesCoordinates,
+    AddHighlightPaneFrameColorOverride,
+    GroupAndUngroupPanes,
+    HighlightAndUnhighlightPanes,
+    FloatMultiplePanes,
+    EmbedMultiplePanes,
+    TogglePaneInGroup,
+    ToggleGroupMarking,
 }
 
 /// Stack call representations corresponding to the different types of [`PtyInstruction`]s.
@@ -512,6 +519,7 @@ pub enum BackgroundJobContext {
     WebRequest,
     ReportPluginList,
     RenderToClients,
+    HighlightPanesWithMessage,
     Exit,
 }
 

zellij-utils/src/input/actions.rs

@@ -296,6 +296,8 @@ pub enum Action {
     TogglePanePinned,
     StackPanes(Vec<PaneId>),
     ChangeFloatingPaneCoordinates(PaneId, FloatingPaneCoordinates),
+    TogglePaneInGroup,
+    ToggleGroupMarking,
 }
 
 impl Action {

zellij-utils/src/input/mod.rs

@@ -45,6 +45,7 @@ mod not_wasm {
             session_name,
             editor: None,
             shell: None,
+            currently_marking_pane_group: None,
         }
     }
 

zellij-utils/src/input/mouse.rs

@@ -208,4 +208,34 @@ impl MouseEvent {
         };
         event
     }
+    pub fn new_left_press_with_alt_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: true,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: true,
+            ctrl: false,
+            position,
+        };
+        event
+    }
+    pub fn new_right_press_with_alt_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: false,
+            right: true,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: true,
+            ctrl: false,
+            position,
+        };
+        event
+    }
 }

zellij-utils/src/input/options.rs

@@ -179,6 +179,12 @@ pub struct Options {
     #[clap(long, value_parser)]
     #[serde(default)]
     pub show_release_notes: Option<bool>,
+
+    /// Whether to enable mouse hover effects and pane grouping functionality
+    /// default is true
+    #[clap(long, value_parser)]
+    #[serde(default)]
+    pub advanced_mouse_actions: Option<bool>,
 }
 
 #[derive(ArgEnum, Deserialize, Serialize, Debug, Clone, Copy, PartialEq)]
@@ -260,6 +266,7 @@ impl Options {
         let stacked_resize = other.stacked_resize.or(self.stacked_resize);
         let show_startup_tips = other.show_startup_tips.or(self.show_startup_tips);
         let show_release_notes = other.show_release_notes.or(self.show_release_notes);
+        let advanced_mouse_actions = other.advanced_mouse_actions.or(self.advanced_mouse_actions);
 
         Options {
             simplified_ui,
@@ -292,6 +299,7 @@ impl Options {
             stacked_resize,
             show_startup_tips,
             show_release_notes,
+            advanced_mouse_actions,
         }
     }
 
@@ -353,6 +361,7 @@ impl Options {
         let stacked_resize = other.stacked_resize.or(self.stacked_resize);
         let show_startup_tips = other.show_startup_tips.or(self.show_startup_tips);
         let show_release_notes = other.show_release_notes.or(self.show_release_notes);
+        let advanced_mouse_actions = other.advanced_mouse_actions.or(self.advanced_mouse_actions);
 
         Options {
             simplified_ui,
@@ -385,6 +394,7 @@ impl Options {
             stacked_resize,
             show_startup_tips,
             show_release_notes,
+            advanced_mouse_actions,
         }
     }
 
@@ -451,8 +461,9 @@ impl From<CliOptions> for Options {
             serialization_interval: opts.serialization_interval,
             support_kitty_keyboard_protocol: opts.support_kitty_keyboard_protocol,
             stacked_resize: opts.stacked_resize,
-            show_release_notes: opts.show_release_notes,
             show_startup_tips: opts.show_startup_tips,
+            show_release_notes: opts.show_release_notes,
+            advanced_mouse_actions: opts.advanced_mouse_actions,
             ..Default::default()
         }
     }

zellij-utils/src/input/plugins.rs

@@ -65,6 +65,7 @@ impl PluginConfig {
                     || tag == "configuration"
                     || tag == "plugin-manager"
                     || tag == "about"
+                    || tag == "multiple-select"
                 {
                     Some(PluginConfig {
                         path: PathBuf::from(&tag),

zellij-utils/src/input/unit/snapshots/zellij_utils__input__theme__theme_test__dracula_theme_from_file.snap

@@ -449,16 +449,12 @@ expression: "format!(\"{:#?}\", theme)"
                 emphasis_0: Rgb(
                     (
                         255,
-                        184,
+                        121,
-                        108,
+                        198,
                     ),
                 ),
-                emphasis_1: Rgb(
+                emphasis_1: EightBit(
-                    (
+                    0,
-                        255,
-                        184,
-                        108,
-                    ),
                 ),
                 emphasis_2: Rgb(
                     (

zellij-utils/src/kdl/mod.rs

@@ -1103,6 +1103,8 @@ impl Action {
                 Some(node)
             },
             Action::TogglePanePinned => Some(KdlNode::new("TogglePanePinned")),
+            Action::TogglePaneInGroup => Some(KdlNode::new("TogglePaneInGroup")),
+            Action::ToggleGroupMarking => Some(KdlNode::new("ToggleGroupMarking")),
             _ => None,
         }
     }
@@ -1798,6 +1800,8 @@ impl TryFrom<(&KdlNode, &Options)> for Action {
                 })
             },
             "TogglePanePinned" => Ok(Action::TogglePanePinned),
+            "TogglePaneInGroup" => Ok(Action::TogglePaneInGroup),
+            "ToggleGroupMarking" => Ok(Action::ToggleGroupMarking),
             _ => Err(ConfigError::new_kdl_error(
                 format!("Unsupported action: {}", action_name).into(),
                 kdl_action.span().offset(),
@@ -2299,6 +2303,9 @@ impl Options {
         let show_release_notes =
             kdl_property_first_arg_as_bool_or_error!(kdl_options, "show_release_notes")
                 .map(|(v, _)| v);
+        let advanced_mouse_actions =
+            kdl_property_first_arg_as_bool_or_error!(kdl_options, "advanced_mouse_actions")
+                .map(|(v, _)| v);
         Ok(Options {
             simplified_ui,
             theme,
@@ -2330,6 +2337,7 @@ impl Options {
             stacked_resize,
             show_startup_tips,
             show_release_notes,
+            advanced_mouse_actions,
         })
     }
     pub fn from_string(stringified_keybindings: &String) -> Result<Self, ConfigError> {
@@ -3207,6 +3215,33 @@ impl Options {
             None
         }
     }
+    fn advanced_mouse_actions_to_kdl(&self, add_comments: bool) -> Option<KdlNode> {
+        let comment_text = format!(
+            "{}\n{}\n{}",
+            " ",
+            "// Whether to enable mouse hover effects and pane grouping functionality",
+            "// default is true",
+        );
+
+        let create_node = |node_value: bool| -> KdlNode {
+            let mut node = KdlNode::new("advanced_mouse_actions");
+            node.push(KdlValue::Bool(node_value));
+            node
+        };
+        if let Some(advanced_mouse_actions) = self.advanced_mouse_actions {
+            let mut node = create_node(advanced_mouse_actions);
+            if add_comments {
+                node.set_leading(format!("{}\n", comment_text));
+            }
+            Some(node)
+        } else if add_comments {
+            let mut node = create_node(false);
+            node.set_leading(format!("{}\n// ", comment_text));
+            Some(node)
+        } else {
+            None
+        }
+    }
     pub fn to_kdl(&self, add_comments: bool) -> Vec<KdlNode> {
         let mut nodes = vec![];
         if let Some(simplified_ui_node) = self.simplified_ui_to_kdl(add_comments) {
@@ -3303,6 +3338,9 @@ impl Options {
         if let Some(show_release_notes) = self.show_release_notes_to_kdl(add_comments) {
             nodes.push(show_release_notes);
         }
+        if let Some(advanced_mouse_actions) = self.advanced_mouse_actions_to_kdl(add_comments) {
+            nodes.push(advanced_mouse_actions);
+        }
         nodes
     }
 }
@@ -4886,6 +4924,7 @@ impl PaneInfo {
             terminal_command,
             plugin_url,
             is_selectable,
+            index_in_pane_group: Default::default(), // we don't serialize this
         };
         Ok((tab_position, pane_info))
     }
@@ -5033,6 +5072,7 @@ fn serialize_and_deserialize_session_info_with_data() {
             terminal_command: Some("foo".to_owned()),
             plugin_url: None,
             is_selectable: true,
+            index_in_pane_group: Default::default(), // we don't serialize this
         },
         PaneInfo {
             id: 1,
@@ -5057,6 +5097,7 @@ fn serialize_and_deserialize_session_info_with_data() {
             terminal_command: None,
             plugin_url: Some("i_am_a_fake_plugin".to_owned()),
             is_selectable: true,
+            index_in_pane_group: Default::default(), // we don't serialize this
         },
     ];
     let mut panes = HashMap::new();

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__bare_config_from_default_assets_to_string.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/kdl/mod.rs
-assertion_line: 5922
 expression: fake_config_stringified
 ---
 keybinds clear-defaults=true {
@@ -147,8 +146,16 @@ keybinds clear-defaults=true {
         bind "Alt j" { MoveFocus "down"; }
         bind "Alt k" { MoveFocus "up"; }
         bind "Alt l" { MoveFocusOrTab "right"; }
+        bind "Alt m" {
+            LaunchOrFocusPlugin "zellij:multiple-select" {
+                floating true
+                move_to_focused_tab true
+            }
+        }
         bind "Alt n" { NewPane; }
         bind "Alt o" { MoveTab "right"; }
+        bind "Alt p" { TogglePaneInGroup; }
+        bind "Alt Shift p" { ToggleGroupMarking; }
         bind "Ctrl q" { Quit; }
     }
     shared_except "locked" "move" {
@@ -256,4 +263,3 @@ plugins {
 }
 load_plugins {
 }
-

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__bare_config_from_default_assets_to_string_with_comments.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/kdl/mod.rs
-assertion_line: 5934
 expression: fake_config_stringified
 ---
 keybinds clear-defaults=true {
@@ -147,8 +146,16 @@ keybinds clear-defaults=true {
         bind "Alt j" { MoveFocus "down"; }
         bind "Alt k" { MoveFocus "up"; }
         bind "Alt l" { MoveFocusOrTab "right"; }
+        bind "Alt m" {
+            LaunchOrFocusPlugin "zellij:multiple-select" {
+                floating true
+                move_to_focused_tab true
+            }
+        }
         bind "Alt n" { NewPane; }
         bind "Alt o" { MoveTab "right"; }
+        bind "Alt p" { TogglePaneInGroup; }
+        bind "Alt Shift p" { ToggleGroupMarking; }
         bind "Ctrl q" { Quit; }
     }
     shared_except "locked" "move" {
@@ -456,3 +463,6 @@ load_plugins {
 // 
 // show_release_notes false
  
+// Whether to enable mouse hover effects and pane grouping functionality
+// default is true
+// advanced_mouse_actions false

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__config_options_to_string_with_comments.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/kdl/mod.rs
-assertion_line: 5873
 expression: fake_document.to_string()
 ---
  
@@ -196,3 +195,6 @@ support_kitty_keyboard_protocol false
 // 
 // show_release_notes false
  
+// Whether to enable mouse hover effects and pane grouping functionality
+// default is true
+// advanced_mouse_actions false

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__themes_to_string.snap

@@ -87,8 +87,8 @@ themes {
         frame_highlight {
             base 255 184 108
             background 0
-            emphasis_0 255 184 108
+            emphasis_0 255 121 198
-            emphasis_1 255 184 108
+            emphasis_1 0
             emphasis_2 255 184 108
             emphasis_3 255 184 108
         }

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__themes_to_string_with_combined_definitions.snap

@@ -87,8 +87,8 @@ themes {
         frame_highlight {
             base 208 135 112
             background 0
-            emphasis_0 208 135 112
+            emphasis_0 70
-            emphasis_1 208 135 112
+            emphasis_1 0
             emphasis_2 208 135 112
             emphasis_3 208 135 112
         }

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__themes_to_string_with_eight_bit_definitions.snap

@@ -87,8 +87,8 @@ themes {
         frame_highlight {
             base 254
             background 0
-            emphasis_0 254
+            emphasis_0 70
-            emphasis_1 254
+            emphasis_1 0
             emphasis_2 254
             emphasis_3 254
         }

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__themes_to_string_with_hex_definitions.snap

@@ -87,8 +87,8 @@ themes {
         frame_highlight {
             base 208 135 112
             background 0
-            emphasis_0 208 135 112
+            emphasis_0 180 142 173
-            emphasis_1 208 135 112
+            emphasis_1 0
             emphasis_2 208 135 112
             emphasis_3 208 135 112
         }

zellij-utils/src/kdl/snapshots/zellij_utils__kdl__themes_to_string_with_multiple_theme_definitions.snap

@@ -87,8 +87,8 @@ themes {
         frame_highlight {
             base 255 184 108
             background 0
-            emphasis_0 255 184 108
+            emphasis_0 255 121 198
-            emphasis_1 255 184 108
+            emphasis_1 0
             emphasis_2 255 184 108
             emphasis_3 255 184 108
         }
@@ -205,8 +205,8 @@ themes {
         frame_highlight {
             base 208 135 112
             background 0
-            emphasis_0 208 135 112
+            emphasis_0 180 142 173
-            emphasis_1 208 135 112
+            emphasis_1 0
             emphasis_2 208 135 112
             emphasis_3 208 135 112
         }

zellij-utils/src/plugin_api/action.proto

@@ -241,6 +241,8 @@ enum ActionName {
     KeybindPipe = 84;
     TogglePanePinned = 85;
     MouseEvent = 86;
+    TogglePaneInGroup = 87;
+    ToggleGroupMarking = 88;
 }
 
 message Position {

zellij-utils/src/plugin_api/action.rs

@@ -692,6 +692,16 @@ impl TryFrom<ProtobufAction> for Action {
                 Some(_) => Err("TogglePanePinned should not have a payload"),
                 None => Ok(Action::TogglePanePinned),
             },
+            Some(ProtobufActionName::TogglePaneInGroup) => match protobuf_action.optional_payload {
+                Some(_) => Err("TogglePaneInGroup should not have a payload"),
+                None => Ok(Action::TogglePaneInGroup),
+            },
+            Some(ProtobufActionName::ToggleGroupMarking) => {
+                match protobuf_action.optional_payload {
+                    Some(_) => Err("ToggleGroupMarking should not have a payload"),
+                    None => Ok(Action::ToggleGroupMarking),
+                }
+            },
             Some(ProtobufActionName::KeybindPipe) => match protobuf_action.optional_payload {
                 Some(_) => Err("KeybindPipe should not have a payload"),
                 // TODO: at some point we might want to support a payload here
@@ -1236,6 +1246,14 @@ impl TryFrom<Action> for ProtobufAction {
                 name: ProtobufActionName::TogglePanePinned as i32,
                 optional_payload: None,
             }),
+            Action::TogglePaneInGroup { .. } => Ok(ProtobufAction {
+                name: ProtobufActionName::TogglePaneInGroup as i32,
+                optional_payload: None,
+            }),
+            Action::ToggleGroupMarking { .. } => Ok(ProtobufAction {
+                name: ProtobufActionName::ToggleGroupMarking as i32,
+                optional_payload: None,
+            }),
             Action::NoOp
             | Action::Confirm
             | Action::NewInPlacePane(..)

zellij-utils/src/plugin_api/event.proto

@@ -54,6 +54,7 @@ enum EventType {
     FailedToChangeHostFolder = 28;
     PastedText = 29;
     ConfigWasWrittenToDisk = 30;
+    BeforeClose = 31;
 }
 
 message EventNameList {
@@ -304,6 +305,12 @@ message PaneInfo {
     optional string terminal_command = 20;
     optional string plugin_url = 21;
     bool is_selectable = 22;
+    repeated IndexInPaneGroup index_in_pane_group = 23;
+}
+
+message IndexInPaneGroup {
+  uint32 client_id = 1;
+  uint32 index = 2;
 }
 
 message TabInfo {
@@ -334,6 +341,7 @@ message ModeUpdatePayload {
   optional input_mode.InputMode base_mode = 6;
   optional string editor = 7;
   optional string shell = 8;
+  optional bool currently_marking_pane_group = 9;
 }
 
 message InputModeKeybinds {

zellij-utils/src/plugin_api/event.rs

@@ -359,6 +359,10 @@ impl TryFrom<ProtobufEvent> for Event {
                 None => Ok(Event::ConfigWasWrittenToDisk),
                 _ => Err("Malformed payload for the ConfigWasWrittenToDisk Event"),
             },
+            Some(ProtobufEventType::BeforeClose) => match protobuf_event.payload {
+                None => Ok(Event::BeforeClose),
+                _ => Err("Malformed payload for the BeforeClose Event"),
+            },
             None => Err("Unknown Protobuf Event"),
         }
     }
@@ -733,6 +737,10 @@ impl TryFrom<Event> for ProtobufEvent {
                 name: ProtobufEventType::ConfigWasWrittenToDisk as i32,
                 payload: None,
             }),
+            Event::BeforeClose => Ok(ProtobufEvent {
+                name: ProtobufEventType::BeforeClose as i32,
+                payload: None,
+            }),
         }
     }
 }
@@ -1072,6 +1080,16 @@ impl TryFrom<ProtobufPaneInfo> for PaneInfo {
             terminal_command: protobuf_pane_info.terminal_command,
             plugin_url: protobuf_pane_info.plugin_url,
             is_selectable: protobuf_pane_info.is_selectable,
+            index_in_pane_group: protobuf_pane_info
+                .index_in_pane_group
+                .iter()
+                .map(|index_in_pane_group| {
+                    (
+                        index_in_pane_group.client_id as u16,
+                        index_in_pane_group.index as usize,
+                    )
+                })
+                .collect(),
         })
     }
 }
@@ -1107,6 +1125,14 @@ impl TryFrom<PaneInfo> for ProtobufPaneInfo {
             terminal_command: pane_info.terminal_command,
             plugin_url: pane_info.plugin_url,
             is_selectable: pane_info.is_selectable,
+            index_in_pane_group: pane_info
+                .index_in_pane_group
+                .iter()
+                .map(|(&client_id, &index)| IndexInPaneGroup {
+                    client_id: client_id as u32,
+                    index: index as u32,
+                })
+                .collect(),
         })
     }
 }
@@ -1216,6 +1242,8 @@ impl TryFrom<ProtobufModeUpdatePayload> for ModeInfo {
         let capabilities = PluginCapabilities {
             arrow_fonts: protobuf_mode_update_payload.arrow_fonts_support,
         };
+        let currently_marking_pane_group =
+            protobuf_mode_update_payload.currently_marking_pane_group;
         let mode_info = ModeInfo {
             mode: current_mode,
             keybinds,
@@ -1225,6 +1253,7 @@ impl TryFrom<ProtobufModeUpdatePayload> for ModeInfo {
             base_mode,
             editor,
             shell,
+            currently_marking_pane_group,
         };
         Ok(mode_info)
     }
@@ -1242,6 +1271,7 @@ impl TryFrom<ModeInfo> for ProtobufModeUpdatePayload {
         let session_name = mode_info.session_name;
         let editor = mode_info.editor.map(|e| e.display().to_string());
         let shell = mode_info.shell.map(|s| s.display().to_string());
+        let currently_marking_pane_group = mode_info.currently_marking_pane_group;
         let mut protobuf_input_mode_keybinds: Vec<ProtobufInputModeKeybinds> = vec![];
         for (input_mode, input_mode_keybinds) in mode_info.keybinds {
             let mode: ProtobufInputMode = input_mode.try_into()?;
@@ -1275,6 +1305,7 @@ impl TryFrom<ModeInfo> for ProtobufModeUpdatePayload {
             base_mode: base_mode.map(|b_m| b_m as i32),
             editor,
             shell,
+            currently_marking_pane_group,
         })
     }
 }
@@ -1344,6 +1375,7 @@ impl TryFrom<ProtobufEventType> for EventType {
             ProtobufEventType::FailedToChangeHostFolder => EventType::FailedToChangeHostFolder,
             ProtobufEventType::PastedText => EventType::PastedText,
             ProtobufEventType::ConfigWasWrittenToDisk => EventType::ConfigWasWrittenToDisk,
+            ProtobufEventType::BeforeClose => EventType::BeforeClose,
         })
     }
 }
@@ -1383,6 +1415,7 @@ impl TryFrom<EventType> for ProtobufEventType {
             EventType::FailedToChangeHostFolder => ProtobufEventType::FailedToChangeHostFolder,
             EventType::PastedText => ProtobufEventType::PastedText,
             EventType::ConfigWasWrittenToDisk => ProtobufEventType::ConfigWasWrittenToDisk,
+            EventType::BeforeClose => ProtobufEventType::BeforeClose,
         })
     }
 }
@@ -1523,6 +1556,7 @@ fn serialize_mode_update_event_with_non_default_values() {
         base_mode: Some(InputMode::Locked),
         editor: Some(PathBuf::from("my_awesome_editor")),
         shell: Some(PathBuf::from("my_awesome_shell")),
+        currently_marking_pane_group: Some(false),
     });
     let protobuf_event: ProtobufEvent = mode_update_event.clone().try_into().unwrap();
     let serialized_protobuf_event = protobuf_event.encode_to_vec();
@@ -1884,6 +1918,14 @@ fn serialize_session_update_event_with_non_default_values() {
         TabInfo::default(),
     ];
     let mut panes = HashMap::new();
+    let mut index_in_pane_group_1 = BTreeMap::new();
+    index_in_pane_group_1.insert(1, 0);
+    index_in_pane_group_1.insert(2, 0);
+    index_in_pane_group_1.insert(3, 0);
+    let mut index_in_pane_group_2 = BTreeMap::new();
+    index_in_pane_group_2.insert(1, 1);
+    index_in_pane_group_2.insert(2, 1);
+    index_in_pane_group_2.insert(3, 1);
     let panes_list = vec![
         PaneInfo {
             id: 1,
@@ -1908,6 +1950,7 @@ fn serialize_session_update_event_with_non_default_values() {
             terminal_command: Some("foo".to_owned()),
             plugin_url: None,
             is_selectable: true,
+            index_in_pane_group: index_in_pane_group_1,
         },
         PaneInfo {
             id: 1,
@@ -1932,6 +1975,7 @@ fn serialize_session_update_event_with_non_default_values() {
             terminal_command: None,
             plugin_url: Some("i_am_a_fake_plugin".to_owned()),
             is_selectable: true,
+            index_in_pane_group: index_in_pane_group_2,
         },
     ];
     panes.insert(0, panes_list);

zellij-utils/src/plugin_api/plugin_command.proto

@@ -140,6 +140,11 @@ enum CommandName {
   OpenFileNearPlugin = 124;
   OpenFileFloatingNearPlugin = 125;
   OpenFileInPlaceOfPlugin = 126;
+  GroupAndUngroupPanes = 127;
+  HighlightAndUnhighlightPanes = 128;
+  CloseMultiplePanes = 129;
+  FloatMultiplePanes = 130;
+  EmbedMultiplePanes = 131;
 }
 
 message PluginCommand {
@@ -236,9 +241,36 @@ message PluginCommand {
     OpenFileNearPluginPayload open_file_near_plugin_payload = 99;
     OpenFileFloatingNearPluginPayload open_file_floating_near_plugin_payload = 100;
     OpenFileInPlaceOfPluginPayload open_file_in_place_of_plugin_payload = 101;
+    GroupAndUngroupPanesPayload group_and_ungroup_panes_payload = 102;
+    HighlightAndUnhighlightPanesPayload highlight_and_unhighlight_panes_payload = 103;
+    CloseMultiplePanesPayload close_multiple_panes_payload = 104;
+    FloatMultiplePanesPayload float_multiple_panes_payload = 105;
+    EmbedMultiplePanesPayload embed_multiple_panes_payload = 106;
   }
 }
 
+message EmbedMultiplePanesPayload {
+  repeated PaneId pane_ids = 1;
+}
+
+message FloatMultiplePanesPayload {
+  repeated PaneId pane_ids = 1;
+}
+
+message CloseMultiplePanesPayload {
+  repeated PaneId pane_ids = 1;
+}
+
+message HighlightAndUnhighlightPanesPayload {
+  repeated PaneId pane_ids_to_highlight = 1;
+  repeated PaneId pane_ids_to_unhighlight = 2;
+}
+
+message GroupAndUngroupPanesPayload {
+  repeated PaneId pane_ids_to_group = 1;
+  repeated PaneId pane_ids_to_ungroup = 2;
+}
+
 message OpenFileInPlaceOfPluginPayload {
   file.File file_to_open = 1;
   optional FloatingPaneCoordinates floating_pane_coordinates = 2;

zellij-utils/src/plugin_api/plugin_command.rs

@@ -5,17 +5,19 @@ pub use super::generated_api::api::{
     plugin_command::{
         plugin_command::Payload, BreakPanesToNewTabPayload, BreakPanesToTabWithIndexPayload,
         ChangeFloatingPanesCoordinatesPayload, ChangeHostFolderPayload,
-        ClearScreenForPaneIdPayload, CliPipeOutputPayload, CloseTabWithIndexPayload, CommandName,
+        ClearScreenForPaneIdPayload, CliPipeOutputPayload, CloseMultiplePanesPayload,
-        ContextItem, EditScrollbackForPaneWithIdPayload, EnvVariable, ExecCmdPayload,
+        CloseTabWithIndexPayload, CommandName, ContextItem, EditScrollbackForPaneWithIdPayload,
+        EmbedMultiplePanesPayload, EnvVariable, ExecCmdPayload,
         FixedOrPercent as ProtobufFixedOrPercent,
-        FixedOrPercentValue as ProtobufFixedOrPercentValue,
+        FixedOrPercentValue as ProtobufFixedOrPercentValue, FloatMultiplePanesPayload,
-        FloatingPaneCoordinates as ProtobufFloatingPaneCoordinates, HidePaneWithIdPayload,
+        FloatingPaneCoordinates as ProtobufFloatingPaneCoordinates, GroupAndUngroupPanesPayload,
-        HttpVerb as ProtobufHttpVerb, IdAndNewName, KeyToRebind, KeyToUnbind, KillSessionsPayload,
+        HidePaneWithIdPayload, HighlightAndUnhighlightPanesPayload, HttpVerb as ProtobufHttpVerb,
-        LoadNewPluginPayload, MessageToPluginPayload, MovePaneWithPaneIdInDirectionPayload,
+        IdAndNewName, KeyToRebind, KeyToUnbind, KillSessionsPayload, LoadNewPluginPayload,
-        MovePaneWithPaneIdPayload, MovePayload, NewPluginArgs as ProtobufNewPluginArgs,
+        MessageToPluginPayload, MovePaneWithPaneIdInDirectionPayload, MovePaneWithPaneIdPayload,
-        NewTabsWithLayoutInfoPayload, OpenCommandPaneFloatingNearPluginPayload,
+        MovePayload, NewPluginArgs as ProtobufNewPluginArgs, NewTabsWithLayoutInfoPayload,
-        OpenCommandPaneInPlaceOfPluginPayload, OpenCommandPaneNearPluginPayload,
+        OpenCommandPaneFloatingNearPluginPayload, OpenCommandPaneInPlaceOfPluginPayload,
-        OpenCommandPanePayload, OpenFileFloatingNearPluginPayload, OpenFileInPlaceOfPluginPayload,
+        OpenCommandPaneNearPluginPayload, OpenCommandPanePayload,
+        OpenFileFloatingNearPluginPayload, OpenFileInPlaceOfPluginPayload,
         OpenFileNearPluginPayload, OpenFilePayload, OpenTerminalFloatingNearPluginPayload,
         OpenTerminalInPlaceOfPluginPayload, OpenTerminalNearPluginPayload,
         PageScrollDownInPaneIdPayload, PageScrollUpInPaneIdPayload, PaneId as ProtobufPaneId,
@@ -1540,6 +1542,78 @@ impl TryFrom<ProtobufPluginCommand> for PluginCommand {
                 },
                 _ => Err("Mismatched payload for OpenFileInPlaceOfPlugin"),
             },
+            Some(CommandName::GroupAndUngroupPanes) => match protobuf_plugin_command.payload {
+                Some(Payload::GroupAndUngroupPanesPayload(group_and_ungroup_panes_payload)) => {
+                    Ok(PluginCommand::GroupAndUngroupPanes(
+                        group_and_ungroup_panes_payload
+                            .pane_ids_to_group
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                        group_and_ungroup_panes_payload
+                            .pane_ids_to_ungroup
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                    ))
+                },
+                _ => Err("Mismatched payload for GroupAndUngroupPanes"),
+            },
+            Some(CommandName::HighlightAndUnhighlightPanes) => {
+                match protobuf_plugin_command.payload {
+                    Some(Payload::HighlightAndUnhighlightPanesPayload(
+                        highlight_and_unhighlight_panes_payload,
+                    )) => Ok(PluginCommand::HighlightAndUnhighlightPanes(
+                        highlight_and_unhighlight_panes_payload
+                            .pane_ids_to_highlight
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                        highlight_and_unhighlight_panes_payload
+                            .pane_ids_to_unhighlight
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                    )),
+                    _ => Err("Mismatched payload for HighlightAndUnhighlightPanes"),
+                }
+            },
+            Some(CommandName::CloseMultiplePanes) => match protobuf_plugin_command.payload {
+                Some(Payload::CloseMultiplePanesPayload(close_multiple_panes_payload)) => {
+                    Ok(PluginCommand::CloseMultiplePanes(
+                        close_multiple_panes_payload
+                            .pane_ids
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                    ))
+                },
+                _ => Err("Mismatched payload for CloseMultiplePanes"),
+            },
+            Some(CommandName::FloatMultiplePanes) => match protobuf_plugin_command.payload {
+                Some(Payload::FloatMultiplePanesPayload(float_multiple_panes_payload)) => {
+                    Ok(PluginCommand::FloatMultiplePanes(
+                        float_multiple_panes_payload
+                            .pane_ids
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                    ))
+                },
+                _ => Err("Mismatched payload for FloatMultiplePanes"),
+            },
+            Some(CommandName::EmbedMultiplePanes) => match protobuf_plugin_command.payload {
+                Some(Payload::EmbedMultiplePanesPayload(embed_multiple_panes_payload)) => {
+                    Ok(PluginCommand::EmbedMultiplePanes(
+                        embed_multiple_panes_payload
+                            .pane_ids
+                            .into_iter()
+                            .filter_map(|p| p.try_into().ok())
+                            .collect(),
+                    ))
+                },
+                _ => Err("Mismatched payload for EmbedMultiplePanes"),
+            },
             None => Err("Unrecognized plugin command"),
         }
     }
@@ -2551,6 +2625,65 @@ impl TryFrom<PluginCommand> for ProtobufPluginCommand {
                     },
                 )),
             }),
+            PluginCommand::GroupAndUngroupPanes(panes_to_group, panes_to_ungroup) => {
+                Ok(ProtobufPluginCommand {
+                    name: CommandName::GroupAndUngroupPanes as i32,
+                    payload: Some(Payload::GroupAndUngroupPanesPayload(
+                        GroupAndUngroupPanesPayload {
+                            pane_ids_to_group: panes_to_group
+                                .iter()
+                                .filter_map(|&p| p.try_into().ok())
+                                .collect(),
+                            pane_ids_to_ungroup: panes_to_ungroup
+                                .iter()
+                                .filter_map(|&p| p.try_into().ok())
+                                .collect(),
+                        },
+                    )),
+                })
+            },
+            PluginCommand::HighlightAndUnhighlightPanes(
+                panes_to_highlight,
+                panes_to_unhighlight,
+            ) => Ok(ProtobufPluginCommand {
+                name: CommandName::HighlightAndUnhighlightPanes as i32,
+                payload: Some(Payload::HighlightAndUnhighlightPanesPayload(
+                    HighlightAndUnhighlightPanesPayload {
+                        pane_ids_to_highlight: panes_to_highlight
+                            .iter()
+                            .filter_map(|&p| p.try_into().ok())
+                            .collect(),
+                        pane_ids_to_unhighlight: panes_to_unhighlight
+                            .iter()
+                            .filter_map(|&p| p.try_into().ok())
+                            .collect(),
+                    },
+                )),
+            }),
+            PluginCommand::CloseMultiplePanes(pane_ids) => Ok(ProtobufPluginCommand {
+                name: CommandName::CloseMultiplePanes as i32,
+                payload: Some(Payload::CloseMultiplePanesPayload(
+                    CloseMultiplePanesPayload {
+                        pane_ids: pane_ids.iter().filter_map(|&p| p.try_into().ok()).collect(),
+                    },
+                )),
+            }),
+            PluginCommand::FloatMultiplePanes(pane_ids) => Ok(ProtobufPluginCommand {
+                name: CommandName::FloatMultiplePanes as i32,
+                payload: Some(Payload::FloatMultiplePanesPayload(
+                    FloatMultiplePanesPayload {
+                        pane_ids: pane_ids.iter().filter_map(|&p| p.try_into().ok()).collect(),
+                    },
+                )),
+            }),
+            PluginCommand::EmbedMultiplePanes(pane_ids) => Ok(ProtobufPluginCommand {
+                name: CommandName::EmbedMultiplePanes as i32,
+                payload: Some(Payload::EmbedMultiplePanesPayload(
+                    EmbedMultiplePanesPayload {
+                        pane_ids: pane_ids.iter().filter_map(|&p| p.try_into().ok()).collect(),
+                    },
+                )),
+            }),
         }
     }
 }

zellij-utils/src/plugin_api/plugin_ids.proto

@@ -6,6 +6,7 @@ message PluginIds {
   int32 plugin_id = 1;
   int32 zellij_pid = 2;
   string initial_cwd = 3;
+  uint32 client_id = 4;
 }
 
 message ZellijVersion {

zellij-utils/src/plugin_api/plugin_ids.rs

@@ -13,6 +13,7 @@ impl TryFrom<ProtobufPluginIds> for PluginIds {
             plugin_id: protobuf_plugin_ids.plugin_id as u32,
             zellij_pid: protobuf_plugin_ids.zellij_pid as u32,
             initial_cwd: PathBuf::from(protobuf_plugin_ids.initial_cwd),
+            client_id: protobuf_plugin_ids.client_id as u16,
         })
     }
 }
@@ -24,6 +25,7 @@ impl TryFrom<PluginIds> for ProtobufPluginIds {
             plugin_id: plugin_ids.plugin_id as i32,
             zellij_pid: plugin_ids.zellij_pid as i32,
             initial_cwd: plugin_ids.initial_cwd.display().to_string(),
+            client_id: plugin_ids.client_id as u32,
         })
     }
 }

zellij-utils/src/snapshots/zellij_utils__setup__setup_test__cli_arguments_override_config_options.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/setup.rs
-assertion_line: 770
 expression: "format!(\"{:#?}\", options)"
 ---
 Options {
@@ -36,4 +35,5 @@ Options {
     stacked_resize: None,
     show_startup_tips: None,
     show_release_notes: None,
+    advanced_mouse_actions: None,
 }

zellij-utils/src/snapshots/zellij_utils__setup__setup_test__cli_arguments_override_layout_options.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/setup.rs
-assertion_line: 798
 expression: "format!(\"{:#?}\", options)"
 ---
 Options {
@@ -36,4 +35,5 @@ Options {
     stacked_resize: None,
     show_startup_tips: None,
     show_release_notes: None,
+    advanced_mouse_actions: None,
 }

zellij-utils/src/snapshots/zellij_utils__setup__setup_test__default_config_with_no_cli_arguments-3.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/setup.rs
-assertion_line: 757
 expression: "format!(\"{:#?}\", options)"
 ---
 Options {
@@ -34,4 +33,5 @@ Options {
     stacked_resize: None,
     show_startup_tips: None,
     show_release_notes: None,
+    advanced_mouse_actions: None,
 }

zellij-utils/src/snapshots/zellij_utils__setup__setup_test__default_config_with_no_cli_arguments.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/setup.rs
-assertion_line: 755
 expression: "format!(\"{:#?}\", config)"
 ---
 Config {
@@ -211,6 +210,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -273,6 +301,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -709,6 +758,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -771,6 +849,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -1165,6 +1264,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -1250,6 +1378,27 @@ Config {
                     Normal,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -1763,6 +1912,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -1843,6 +2021,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -2251,6 +2450,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -2313,6 +2541,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -2605,6 +2854,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -2667,6 +2945,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3031,6 +3330,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3123,6 +3451,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3410,6 +3759,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3472,6 +3850,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3742,6 +4141,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3804,6 +4232,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4128,6 +4577,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4218,6 +4696,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4591,6 +5090,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4671,6 +5199,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4936,6 +5485,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4998,6 +5576,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -5446,6 +6045,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -5538,6 +6166,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -5643,6 +6292,7 @@ Config {
         stacked_resize: None,
         show_startup_tips: None,
         show_release_notes: None,
+        advanced_mouse_actions: None,
     },
     themes: {},
     plugins: PluginAliases {

zellij-utils/src/snapshots/zellij_utils__setup__setup_test__layout_env_vars_override_config_env_vars.snap

@@ -1,6 +1,5 @@
 ---
 source: zellij-utils/src/setup.rs
-assertion_line: 813
 expression: "format!(\"{:#?}\", config)"
 ---
 Config {
@@ -211,6 +210,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -273,6 +301,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -709,6 +758,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -771,6 +849,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -1165,6 +1264,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -1250,6 +1378,27 @@ Config {
                     Normal,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -1763,6 +1912,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -1843,6 +2021,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -2251,6 +2450,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -2313,6 +2541,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -2605,6 +2854,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -2667,6 +2945,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3031,6 +3330,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3123,6 +3451,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3410,6 +3759,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3472,6 +3850,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -3742,6 +4141,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -3804,6 +4232,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4128,6 +4577,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4218,6 +4696,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4591,6 +5090,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4671,6 +5199,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -4936,6 +5485,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -4998,6 +5576,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -5446,6 +6045,35 @@ Config {
                     Right,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'm',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                LaunchOrFocusPlugin(
+                    RunPlugin(
+                        RunPlugin {
+                            _allow_exec_host_cmd: false,
+                            location: Zellij(
+                                PluginTag(
+                                    "multiple-select",
+                                ),
+                            ),
+                            configuration: PluginUserConfiguration(
+                                {},
+                            ),
+                            initial_cwd: None,
+                        },
+                    ),
+                    true,
+                    true,
+                    false,
+                    false,
+                ),
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'n',
@@ -5538,6 +6166,27 @@ Config {
                     Pane,
                 ),
             ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                },
+            }: [
+                TogglePaneInGroup,
+            ],
+            KeyWithModifier {
+                bare_key: Char(
+                    'p',
+                ),
+                key_modifiers: {
+                    Alt,
+                    Shift,
+                },
+            }: [
+                ToggleGroupMarking,
+            ],
             KeyWithModifier {
                 bare_key: Char(
                     'q',
@@ -5643,6 +6292,7 @@ Config {
         stacked_resize: None,
         show_startup_tips: None,
         show_release_notes: None,
+        advanced_mouse_actions: None,
     },
     themes: {},
     plugins: PluginAliases {