Add Focus Follows Mouse

Cargo.toml

@@ -24,10 +24,10 @@ palette = "0.7"
 git = "https://github.com/pop-os/cosmic-text.git"
 
 [dependencies.libcosmic]
-git = "https://github.com/pop-os/libcosmic.git"
+#git = "https://github.com/pop-os/libcosmic.git"
 default-features = false
 features = ["tokio", "winit"]
-#path = "../libcosmic"
+path = "../libcosmic"
 
 [features]
 default = ["wgpu"]

i18n/en/cosmic_term.ftl

@@ -2,6 +2,7 @@
 
 ## Settings
 settings = Settings
+focus-follow-mouse = Focus Follow Mouse
 
 ### Appearance
 appearance = Appearance

src/config.rs

@@ -43,6 +43,7 @@ pub struct Config {
     pub use_bright_bold: bool,
     pub syntax_theme_dark: String,
     pub syntax_theme_light: String,
+    pub focus_follow_mouse: bool,
 }
 
 impl Default for Config {
@@ -60,6 +61,7 @@ impl Default for Config {
             use_bright_bold: false,
             syntax_theme_dark: "COSMIC Dark".to_string(),
             syntax_theme_light: "COSMIC Light".to_string(),
+            focus_follow_mouse: false,
         }
     }
 }

src/main.rs

@@ -260,6 +260,7 @@ pub enum Message {
     PaneDragged(pane_grid::DragEvent),
     PaneResized(pane_grid::ResizeEvent),
     Modifiers(Modifiers),
+    MouseEnter(pane_grid::Pane),
     Paste(Option<segmented_button::Entity>),
     PasteValue(Option<segmented_button::Entity>, String),
     SelectAll(Option<segmented_button::Entity>),
@@ -284,6 +285,7 @@ pub enum Message {
     ZoomIn,
     ZoomOut,
     ZoomReset,
+    FocusFollowMouse(bool),
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
@@ -637,6 +639,10 @@ impl App {
             .add(
                 widget::settings::item::builder(fl!("show-headerbar"))
                     .toggler(self.config.show_headerbar, Message::ShowHeaderBar),
+            )
+            .add(
+                widget::settings::item::builder(fl!("focus-follow-mouse"))
+                    .toggler(self.config.focus_follow_mouse, Message::FocusFollowMouse),
             );
 
         widget::settings::view_column(vec![settings_view.into()]).into()
@@ -1047,6 +1053,10 @@ impl Application for App {
             Message::Modifiers(modifiers) => {
                 self.modifiers = modifiers;
             }
+            Message::MouseEnter(pane) => {
+                self.pane_model.focus = pane;
+                return self.update_focus();
+            }
             Message::PaneClicked(pane) => {
                 self.pane_model.focus = pane;
                 return self.update_title(Some(pane));
@@ -1125,6 +1135,12 @@ impl Application for App {
                     return self.save_config();
                 }
             }
+            Message::FocusFollowMouse(focus_follow_mouse) => {
+                if focus_follow_mouse != self.config.focus_follow_mouse {
+                    self.config.focus_follow_mouse = focus_follow_mouse;
+                    return self.save_config();
+                }
+            }
             Message::SystemThemeModeChange(_theme_mode) => {
                 return self.update_config();
             }
@@ -1403,10 +1419,15 @@ impl Application for App {
                 .unwrap_or_else(widget::Id::unique);
             match tab_model.data::<Mutex<Terminal>>(entity) {
                 Some(terminal) => {
-                    let terminal_box = terminal_box(terminal).id(terminal_id).on_context_menu(
+                    let mut terminal_box = terminal_box(terminal).id(terminal_id).on_context_menu(
                         move |position_opt| Message::TabContextMenu(entity, position_opt),
                     );
 
+                    if self.config.focus_follow_mouse {
+                        terminal_box =
+                            terminal_box.on_mouse_enter(move || Message::MouseEnter(pane));
+                    }
+
                     let context_menu = {
                         let terminal = terminal.lock().unwrap();
                         terminal.context_menu

src/terminal_box.rs

@@ -47,6 +47,8 @@ pub struct TerminalBox<'a, Message> {
     click_timing: Duration,
     context_menu: Option<Point>,
     on_context_menu: Option<Box<dyn Fn(Option<Point>) -> Message + 'a>>,
+    on_mouse_enter: Option<Box<dyn Fn() -> Message + 'a>>,
+    mouse_inside_boundary: Option<bool>,
 }
 
 impl<'a, Message> TerminalBox<'a, Message>
@@ -61,6 +63,8 @@ where
             click_timing: Duration::from_millis(500),
             context_menu: None,
             on_context_menu: None,
+            on_mouse_enter: None,
+            mouse_inside_boundary: None,
         }
     }
 
@@ -91,6 +95,11 @@ where
         self.on_context_menu = Some(Box::new(on_context_menu));
         self
     }
+
+    pub fn on_mouse_enter(mut self, on_mouse_enter: impl Fn() -> Message + 'a) -> Self {
+        self.on_mouse_enter = Some(Box::new(on_mouse_enter));
+        self
+    }
 }
 
 pub fn terminal_box<'a, Message>(terminal: &'a Mutex<Terminal>) -> TerminalBox<'a, Message>
@@ -998,6 +1007,19 @@ where
                 status = Status::Captured;
             }
             Event::Mouse(MouseEvent::CursorMoved { .. }) => {
+                if let Some(on_mouse_enter) = &self.on_mouse_enter {
+                    let mouse_is_inside = cursor_position.position_in(layout.bounds()).is_some();
+                    if let Some(known_is_inside) = self.mouse_inside_boundary {
+                        if mouse_is_inside != known_is_inside {
+                            if mouse_is_inside {
+                                shell.publish(on_mouse_enter());
+                            }
+                            self.mouse_inside_boundary = Some(mouse_is_inside);
+                        }
+                    } else {
+                        self.mouse_inside_boundary = Some(mouse_is_inside);
+                    }
+                }
                 if let Some(dragging) = &state.dragging {
                     if let Some(p) = cursor_position.position() {
                         let x = (p.x - layout.bounds().x) - self.padding.left;