gui: move last_mouse_terminal_coords to per-pane state

wezterm-gui/src/termwindow/mod.rs

@@ -159,6 +159,7 @@ pub struct PaneState {
     pub overlay: Option<Rc<dyn Pane>>,
 
     bell_start: Option<Instant>,
+    pub mouse_terminal_coords: Option<(usize, StableRowIndex)>,
 }
 
 /// Data used when synchronously formatting pane and window titles
@@ -309,7 +310,6 @@ pub struct TermWindow {
     /// If so, we ignore mouse events until released
     is_click_to_focus: bool,
     last_mouse_coords: (usize, i64),
-    last_mouse_terminal_coords: (usize, StableRowIndex),
     window_drag_position: Option<MouseEvent>,
     current_mouse_event: Option<MouseEvent>,
     prev_cursor: PrevCursorPos,
@@ -709,7 +709,6 @@ impl TermWindow {
             fancy_tab_bar: None,
             right_status: String::new(),
             last_mouse_coords: (0, -1),
-            last_mouse_terminal_coords: (0, 0),
             window_drag_position: None,
             current_mouse_event: None,
             prev_cursor: PrevCursorPos::new(),

wezterm-gui/src/termwindow/mouseevent.rs

@@ -554,7 +554,9 @@ impl super::TermWindow {
             .unwrap_or(dims.physical_top)
             + y as StableRowIndex;
 
-        self.last_mouse_terminal_coords = (x, stable_row); // FIXME: per-pane
+        self.pane_state(pane.pane_id())
+            .mouse_terminal_coords
+            .replace((x, stable_row));
 
         let (top, mut lines) = pane.get_lines_with_hyperlinks_applied(
             stable_row..stable_row + 1,

wezterm-gui/src/termwindow/selection.rs

@@ -58,7 +58,10 @@ impl super::TermWindow {
     ) {
         self.selection(pane.pane_id()).seqno = pane.get_current_seqno();
         let mode = mode.unwrap_or(SelectionMode::Cell);
-        let (x, y) = self.last_mouse_terminal_coords;
+        let (x, y) = match self.pane_state(pane.pane_id()).mouse_terminal_coords {
+            Some(coords) => coords,
+            None => return,
+        };
         match mode {
             SelectionMode::Cell => {
                 let end = SelectionCoordinate { x, y };
@@ -145,7 +148,10 @@ impl super::TermWindow {
     }
 
     pub fn select_text_at_mouse_cursor(&mut self, mode: SelectionMode, pane: &Rc<dyn Pane>) {
-        let (x, y) = self.last_mouse_terminal_coords;
+        let (x, y) = match self.pane_state(pane.pane_id()).mouse_terminal_coords {
+            Some(coords) => coords,
+            None => return,
+        };
         match mode {
             SelectionMode::Line => {
                 let start = SelectionCoordinate { x, y };