linux: Fix IME panel position while enumerating input methods (#12495)

Release Notes:

- N/A

This updates the IME position every time the selection changes, this is
probably only useful when you enumerate languages with your IME.

TODO:
- ~There is a rare chance that the ime panel is not updated because the
window input handler is None.~
- ~Update IME panel in vim mode.~
- ~Update IME panel when leaving Buffer search input.~

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/terminal_view/src/terminal_element.rs

@@ -5,7 +5,7 @@ use gpui::{
     HighlightStyle, Hitbox, Hsla, InputHandler, InteractiveElement, Interactivity, IntoElement,
     LayoutId, Model, ModelContext, ModifiersChangedEvent, MouseButton, MouseMoveEvent, Pixels,
     Point, ShapedLine, StatefulInteractiveElement, StrikethroughStyle, Styled, TextRun, TextStyle,
-    UnderlineStyle, View, WeakView, WhiteSpace, WindowContext, WindowTextSystem,
+    UTF16Selection, UnderlineStyle, View, WeakView, WhiteSpace, WindowContext, WindowTextSystem,
 };
 use itertools::Itertools;
 use language::CursorShape;
@@ -976,7 +976,11 @@ struct TerminalInputHandler {
 }
 
 impl InputHandler for TerminalInputHandler {
-    fn selected_text_range(&mut self, cx: &mut WindowContext) -> Option<std::ops::Range<usize>> {
+    fn selected_text_range(
+        &mut self,
+        _ignore_disabled_input: bool,
+        cx: &mut WindowContext,
+    ) -> Option<UTF16Selection> {
         if self
             .terminal
             .read(cx)
@@ -986,7 +990,10 @@ impl InputHandler for TerminalInputHandler {
         {
             None
         } else {
-            Some(0..0)
+            Some(UTF16Selection {
+                range: 0..0,
+                reversed: false,
+            })
         }
     }
 
@@ -1014,6 +1021,8 @@ impl InputHandler for TerminalInputHandler {
 
         self.workspace
             .update(cx, |this, cx| {
+                cx.invalidate_character_coordinates();
+
                 let telemetry = this.project().read(cx).client().telemetry().clone();
                 telemetry.log_edit_event("terminal");
             })