keymap_ui: Show matching bindings (#35732)

Closes #ISSUE

Adds a bit of text in the keybind editing modal when there are existing
keystrokes with the same key, with the ability for the user to click the
text and have the keymap editor search be updated to show only bindings
with those keystrokes

Release Notes:

- Keymap Editor: Added a warning to the keybind editing modal when
existing bindings have the same keystrokes. Clicking the warning will
close the modal and show bindings with the entered keystrokes in the
keymap editor. This behavior was previously possible with the
`keymap_editor::ShowMatchingKeybinds` action in the Keymap Editor, and
is now present in the keybind editing modal as well.

crates/settings_ui/src/keybindings.rs

@@ -374,6 +374,14 @@ impl Focusable for KeymapEditor {
         }
     }
 }
+/// Helper function to check if two keystroke sequences match exactly
+fn keystrokes_match_exactly(keystrokes1: &[Keystroke], keystrokes2: &[Keystroke]) -> bool {
+    keystrokes1.len() == keystrokes2.len()
+        && keystrokes1
+            .iter()
+            .zip(keystrokes2)
+            .all(|(k1, k2)| k1.key == k2.key && k1.modifiers == k2.modifiers)
+}
 
 impl KeymapEditor {
     fn new(workspace: WeakEntity<Workspace>, window: &mut Window, cx: &mut Context<Self>) -> Self {
@@ -549,13 +557,7 @@ impl KeymapEditor {
                             .keystrokes()
                             .is_some_and(|keystrokes| {
                                 if exact_match {
-                                    keystroke_query.len() == keystrokes.len()
+                                    keystrokes_match_exactly(&keystroke_query, keystrokes)
-                                        && keystroke_query.iter().zip(keystrokes).all(
-                                            |(query, keystroke)| {
-                                                query.key == keystroke.key
-                                                    && query.modifiers == keystroke.modifiers
-                                            },
-                                        )
                                 } else if keystroke_query.len() > keystrokes.len() {
                                     return false;
                                 } else {
@@ -2340,8 +2342,50 @@ impl KeybindingEditorModal {
         self.save_or_display_error(cx);
     }
 
-    fn cancel(&mut self, _: &menu::Cancel, _window: &mut Window, cx: &mut Context<Self>) {
+    fn cancel(&mut self, _: &menu::Cancel, _: &mut Window, cx: &mut Context<Self>) {
-        cx.emit(DismissEvent)
+        cx.emit(DismissEvent);
+    }
+
+    fn get_matching_bindings_count(&self, cx: &Context<Self>) -> usize {
+        let current_keystrokes = self.keybind_editor.read(cx).keystrokes().to_vec();
+
+        if current_keystrokes.is_empty() {
+            return 0;
+        }
+
+        self.keymap_editor
+            .read(cx)
+            .keybindings
+            .iter()
+            .enumerate()
+            .filter(|(idx, binding)| {
+                // Don't count the binding we're currently editing
+                if !self.creating && *idx == self.editing_keybind_idx {
+                    return false;
+                }
+
+                binding
+                    .keystrokes()
+                    .map(|keystrokes| keystrokes_match_exactly(keystrokes, &current_keystrokes))
+                    .unwrap_or(false)
+            })
+            .count()
+    }
+
+    fn show_matching_bindings(&mut self, _window: &mut Window, cx: &mut Context<Self>) {
+        let keystrokes = self.keybind_editor.read(cx).keystrokes().to_vec();
+
+        // Dismiss the modal
+        cx.emit(DismissEvent);
+
+        // Update the keymap editor to show matching keystrokes
+        self.keymap_editor.update(cx, |editor, cx| {
+            editor.filter_state = FilterState::All;
+            editor.search_mode = SearchMode::KeyStroke { exact_match: true };
+            editor.keystroke_editor.update(cx, |keystroke_editor, cx| {
+                keystroke_editor.set_keystrokes(keystrokes, cx);
+            });
+        });
     }
 }
 
@@ -2356,6 +2400,7 @@ fn remove_key_char(Keystroke { modifiers, key, .. }: Keystroke) -> Keystroke {
 impl Render for KeybindingEditorModal {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         let theme = cx.theme().colors();
+        let matching_bindings_count = self.get_matching_bindings_count(cx);
 
         v_flex()
             .w(rems(34.))
@@ -2427,19 +2472,37 @@ impl Render for KeybindingEditorModal {
                         ),
                     )
                     .footer(
-                        ModalFooter::new().end_slot(
+                        ModalFooter::new()
-                            h_flex()
+                            .start_slot(
-                                .gap_1()
+                                div().when(matching_bindings_count > 0, |this| {
-                                .child(
+                                    this.child(
-                                    Button::new("cancel", "Cancel")
+                                        Button::new("show_matching", format!(
-                                        .on_click(cx.listener(|_, _, _, cx| cx.emit(DismissEvent))),
+                                            "There {} {} {} with the same keystrokes. Click to view",
-                                )
+                                            if matching_bindings_count == 1 { "is" } else { "are" },
-                                .child(Button::new("save-btn", "Save").on_click(cx.listener(
+                                            matching_bindings_count,
-                                    |this, _event, _window, cx| {
+                                            if matching_bindings_count == 1 { "binding" } else { "bindings" }
-                                        this.save_or_display_error(cx);
+                                        ))
-                                    },
+                                        .style(ButtonStyle::Transparent)
-                                ))),
+                                        .color(Color::Accent)
-                        ),
+                                        .on_click(cx.listener(|this, _, window, cx| {
+                                            this.show_matching_bindings(window, cx);
+                                        }))
+                                    )
+                                })
+                            )
+                            .end_slot(
+                                h_flex()
+                                    .gap_1()
+                                    .child(
+                                        Button::new("cancel", "Cancel")
+                                            .on_click(cx.listener(|_, _, _, cx| cx.emit(DismissEvent))),
+                                    )
+                                    .child(Button::new("save-btn", "Save").on_click(cx.listener(
+                                        |this, _event, _window, cx| {
+                                            this.save_or_display_error(cx);
+                                        },
+                                    ))),
+                            ),
                     ),
             )
     }