feat(terminal): multiline hyperlink support (#4264)

* working

* done

* docs(changelog): add PR

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 * performance: consolidate renders (https://github.com/zellij-org/zellij/pull/4245)
 * feat: add plugin API to replace a pane with another existing pane (https://github.com/zellij-org/zellij/pull/4246)
 * feat: add "stack" keybinding and CLI action to add a stacked pane to the current pane (https://github.com/zellij-org/zellij/pull/4255)
+* fix: support multiline hyperlinks (https://github.com/zellij-org/zellij/pull/4264)
 
 ## [0.42.2] - 2025-04-15
 * refactor(terminal): track scroll_region as tuple rather than Option (https://github.com/zellij-org/zellij/pull/4082)

zellij-server/src/panes/grid.rs

@@ -31,6 +31,7 @@ use zellij_utils::{consts::VERSION, shared::version_number};
 
 use crate::output::{CharacterChunk, OutputBuffer, SixelImageChunk};
 use crate::panes::alacritty_functions::{parse_number, xparse_color};
+use crate::panes::hyperlink_tracker::HyperlinkTracker;
 use crate::panes::link_handler::LinkHandler;
 use crate::panes::search::SearchResult;
 use crate::panes::selection::Selection;
@@ -363,6 +364,7 @@ pub struct Grid {
     explicitly_disable_kitty_keyboard_protocol: bool, // has kitty keyboard support been explicitly
     // disabled by user config?
     click: Click,
+    hyperlink_tracker: HyperlinkTracker,
 }
 
 const CLICK_TIME_THRESHOLD: u128 = 400; // Doherty Threshold
@@ -550,6 +552,7 @@ impl Grid {
             supports_kitty_keyboard_protocol: false,
             explicitly_disable_kitty_keyboard_protocol,
             click: Click::default(),
+            hyperlink_tracker: HyperlinkTracker::new(),
         }
     }
     pub fn render_full_viewport(&mut self) {
@@ -1294,6 +1297,13 @@ impl Grid {
     }
     pub fn add_canonical_line(&mut self) {
         let (scroll_region_top, scroll_region_bottom) = self.scroll_region;
+        self.hyperlink_tracker.update(
+            '\n',
+            &self.cursor,
+            &mut self.viewport,
+            &mut self.lines_above,
+            &mut self.link_handler.borrow_mut(),
+        );
         if self.cursor.y == scroll_region_bottom {
             // end of scroll region
             // when we have a scroll region set and we're at its bottom
@@ -1348,6 +1358,13 @@ impl Grid {
         terminal_character: TerminalCharacter,
         should_insert_character: bool,
     ) {
+        self.hyperlink_tracker.update(
+            terminal_character.character,
+            &self.cursor,
+            &mut self.viewport,
+            &mut self.lines_above,
+            &mut self.link_handler.borrow_mut(),
+        );
         // this function assumes the current line has enough room for terminal_character (that its
         // width has been checked beforehand)
         match self.viewport.get_mut(self.cursor.y) {
@@ -1477,6 +1494,7 @@ impl Grid {
         if self.cursor.y == self.height.saturating_sub(1) {
             if self.alternate_screen_state.is_none() {
                 self.transfer_rows_to_lines_above(1);
+                self.hyperlink_tracker.offset_cursor_lines(1);
             } else {
                 self.viewport.remove(0);
             }

zellij-server/src/panes/link_handler.rs

@@ -11,8 +11,8 @@ pub struct LinkHandler {
 }
 #[derive(Debug, Clone)]
 pub struct Link {
-    id: Option<String>,
+    pub id: Option<String>,
-    uri: String,
+    pub uri: String,
 }
 
 impl LinkHandler {
@@ -49,6 +49,19 @@ impl LinkHandler {
         }
     }
 
+    pub fn new_link_from_url(&mut self, url: String) -> LinkAnchor {
+        let anchor = LinkAnchor::Start(self.link_index);
+        self.links.insert(
+            self.link_index,
+            Link {
+                id: Some(self.link_index.to_string()),
+                uri: url,
+            },
+        );
+        self.link_index += 1;
+        anchor
+    }
+
     pub fn output_osc8(&self, link_anchor: Option<LinkAnchor>) -> Option<String> {
         link_anchor.and_then(|link| match link {
             LinkAnchor::Start(index) => {
@@ -74,6 +87,11 @@ impl LinkHandler {
             LinkAnchor::End => Some(format!("\u{1b}]8;;{}", TERMINATOR)),
         })
     }
+
+    #[cfg(test)]
+    pub fn links(&self) -> HashMap<u16, Link> {
+        self.links.clone()
+    }
 }
 
 impl Default for LinkHandler {

zellij-server/src/panes/mod.rs

@@ -1,5 +1,6 @@
 pub mod alacritty_functions;
 pub mod grid;
+pub mod hyperlink_tracker;
 pub mod link_handler;
 pub mod selection;
 pub mod sixel;