feat(statusbar): max status bar height (#156)

src/errors.rs

@@ -167,6 +167,7 @@ pub enum ScreenContext {
     CloseFocusedPane,
     ToggleActiveTerminalFullscreen,
     SetSelectable,
+    SetMaxHeight,
     ClosePane,
     ApplyLayout,
     NewTab,
@@ -202,6 +203,7 @@ impl From<&ScreenInstruction> for ScreenContext {
                 ScreenContext::ToggleActiveTerminalFullscreen
             }
             ScreenInstruction::SetSelectable(..) => ScreenContext::SetSelectable,
+            ScreenInstruction::SetMaxHeight(..) => ScreenContext::SetMaxHeight,
             ScreenInstruction::ClosePane(_) => ScreenContext::ClosePane,
             ScreenInstruction::ApplyLayout(_) => ScreenContext::ApplyLayout,
             ScreenInstruction::NewTab(_) => ScreenContext::NewTab,

src/main.rs

@@ -406,6 +406,12 @@ pub fn start(mut os_input: Box<dyn OsApi>, opts: CliArgs) {
                             // FIXME: Is this needed?
                             screen.render();
                         }
+                        ScreenInstruction::SetMaxHeight(id, max_height) => {
+                            screen
+                                .get_active_tab_mut()
+                                .unwrap()
+                                .set_pane_max_height(id, max_height);
+                        }
                         ScreenInstruction::ClosePane(id) => {
                             screen.get_active_tab_mut().unwrap().close_pane(id);
                             screen.render();

src/panes/plugin_pane.rs

@@ -13,6 +13,7 @@ pub struct PluginPane {
     pub position_and_size: PositionAndSize,
     pub position_and_size_override: Option<PositionAndSize>,
     pub send_plugin_instructions: SenderWithContext<PluginInstruction>,
+    pub max_height: Option<usize>,
 }
 
 impl PluginPane {
@@ -28,6 +29,7 @@ impl PluginPane {
             position_and_size,
             position_and_size_override: None,
             send_plugin_instructions,
+            max_height: None,
         }
     }
 }
@@ -100,6 +102,9 @@ impl Pane for PluginPane {
     fn set_selectable(&mut self, selectable: bool) {
         self.selectable = selectable;
     }
+    fn set_max_height(&mut self, max_height: usize) {
+        self.max_height = Some(max_height);
+    }
     fn render(&mut self) -> Option<String> {
         // if self.should_render {
         if true {
@@ -172,4 +177,7 @@ impl Pane for PluginPane {
     fn clear_scroll(&mut self) {
         unimplemented!()
     }
+    fn max_height(&self) -> Option<usize> {
+        self.max_height
+    }
 }

src/panes/terminal_pane.rs

@@ -46,6 +46,7 @@ pub struct TerminalPane {
     pub position_and_size: PositionAndSize,
     pub position_and_size_override: Option<PositionAndSize>,
     pub cursor_key_mode: bool, // DECCKM - when set, cursor keys should send ANSI direction codes (eg. "OD") instead of the arrow keys (eg. "")
+    pub max_height: Option<usize>,
     pending_styles: CharacterStyles,
     clear_viewport_before_rendering: bool,
 }
@@ -177,6 +178,12 @@ impl Pane for TerminalPane {
     fn set_selectable(&mut self, selectable: bool) {
         self.selectable = selectable;
     }
+    fn set_max_height(&mut self, max_height: usize) {
+        self.max_height = Some(max_height);
+    }
+    fn max_height(&self) -> Option<usize> {
+        self.max_height
+    }
     fn render(&mut self) -> Option<String> {
         // if self.should_render {
         if true {
@@ -309,6 +316,7 @@ impl TerminalPane {
             position_and_size_override: None,
             cursor_key_mode: false,
             clear_viewport_before_rendering: false,
+            max_height: None,
         }
     }
     pub fn mark_for_rerender(&mut self) {

src/screen.rs

@@ -43,6 +43,7 @@ pub enum ScreenInstruction {
     CloseFocusedPane,
     ToggleActiveTerminalFullscreen,
     SetSelectable(PaneId, bool),
+    SetMaxHeight(PaneId, usize),
     ClosePane(PaneId),
     ApplyLayout((Layout, Vec<RawFd>)),
     NewTab(RawFd),

src/tab.rs

@@ -86,6 +86,7 @@ pub trait Pane {
     fn set_should_render(&mut self, should_render: bool);
     fn selectable(&self) -> bool;
     fn set_selectable(&mut self, selectable: bool);
+    fn set_max_height(&mut self, max_height: usize);
     fn render(&mut self) -> Option<String>;
     fn pid(&self) -> PaneId;
     fn reduce_height_down(&mut self, count: usize);
@@ -1894,6 +1895,11 @@ impl Tab {
             }
         }
     }
+    pub fn set_pane_max_height(&mut self, id: PaneId, max_height: usize) {
+        if let Some(pane) = self.panes.get_mut(&id) {
+            pane.set_max_height(max_height);
+        }
+    }
     pub fn close_pane(&mut self, id: PaneId) {
         if self.panes.get(&id).is_some() {
             self.close_pane_without_rerender(id);

src/wasm_vm.rs

@@ -35,6 +35,7 @@ pub fn mosaic_imports(store: &Store, plugin_env: &PluginEnv) -> ImportObject {
     imports! {
         "mosaic" => {
             "host_open_file" => Function::new_native_with_env(store, plugin_env.clone(), host_open_file),
+            "host_set_max_height" => Function::new_native_with_env(store, plugin_env.clone(), host_set_max_height),
             "host_set_selectable" => Function::new_native_with_env(store, plugin_env.clone(), host_set_selectable),
             "host_get_help" => Function::new_native_with_env(store, plugin_env.clone(), host_get_help),
         }
@@ -62,6 +63,17 @@ fn host_set_selectable(plugin_env: &PluginEnv, selectable: i32) {
         .unwrap()
 }
 
+fn host_set_max_height(plugin_env: &PluginEnv, max_height: i32) {
+    let max_height = max_height as usize;
+    plugin_env
+        .send_screen_instructions
+        .send(ScreenInstruction::SetMaxHeight(
+            PaneId::Plugin(plugin_env.plugin_id),
+            max_height,
+        ))
+        .unwrap()
+}
+
 fn host_get_help(plugin_env: &PluginEnv) {
     let (state_tx, state_rx) = channel();
     // FIXME: If I changed the application so that threads were sent the termination