git: New actions for git panel navigation (#43701)

I could not find any related issue, but at least I want to use the git
panel like this :)

Being used to `lazygit`, this PR makes navigation of the git panel more
similar to the CLI tool.

Instead of selecting -> enter'ing for skimming each file, I just want to
move between the files in the git panel and have the diff multibuffer
advance to the appropriate file. This also adheres to the behavior of
the outline panel, which I like better.

If the multibuffer is not active, it behaves same as before (just
selecting the file in the panel, nothing else).

I did not modify existing `menu::Select*` actions in case anybody still
prefers previous behavior.




https://github.com/user-attachments/assets/2d1303d4-50c8-4500-ab3b-302eb7d4afda



Release Notes:

- Improved navigation of the git panel, by advancing the "Uncommitted
Changes" multibuffer to the current selected file. To restore the old
behavior, you can bind `up` and `down` to `menu::SelectPrevious` and
`menu::SelectNext` under the `GitPanel` context in your keymap.

Co-authored-by: Cole Miller <cole@zed.dev>

assets/keymaps/default-linux.json

@@ -905,8 +905,8 @@
     "bindings": {
       "left": "git_panel::CollapseSelectedEntry",
       "right": "git_panel::ExpandSelectedEntry",
-      "up": "menu::SelectPrevious",
-      "down": "menu::SelectNext",
+      "up": "git_panel::PreviousEntry",
+      "down": "git_panel::NextEntry",
       "enter": "menu::Confirm",
       "alt-y": "git::StageFile",
       "alt-shift-y": "git::UnstageFile",

assets/keymaps/default-macos.json

@@ -981,12 +981,12 @@
     "context": "GitPanel && ChangesList",
     "use_key_equivalents": true,
     "bindings": {
+      "up": "git_panel::PreviousEntry",
+      "down": "git_panel::NextEntry",
+      "cmd-up": "git_panel::FirstEntry",
+      "cmd-down": "git_panel::LastEntry",
       "left": "git_panel::CollapseSelectedEntry",
       "right": "git_panel::ExpandSelectedEntry",
-      "up": "menu::SelectPrevious",
-      "down": "menu::SelectNext",
-      "cmd-up": "menu::SelectFirst",
-      "cmd-down": "menu::SelectLast",
       "enter": "menu::Confirm",
       "cmd-alt-y": "git::ToggleStaged",
       "space": "git::ToggleStaged",

assets/keymaps/default-windows.json

@@ -908,10 +908,10 @@
     "context": "GitPanel && ChangesList",
     "use_key_equivalents": true,
     "bindings": {
+      "up": "git_panel::PreviousEntry",
+      "down": "git_panel::NextEntry",
       "left": "git_panel::CollapseSelectedEntry",
       "right": "git_panel::ExpandSelectedEntry",
-      "up": "menu::SelectPrevious",
-      "down": "menu::SelectNext",
       "enter": "menu::Confirm",
       "alt-y": "git::StageFile",
       "shift-alt-y": "git::UnstageFile",

crates/git_ui/src/git_panel.rs

@@ -46,7 +46,7 @@ use language_model::{
     ConfiguredModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
     Role, ZED_CLOUD_PROVIDER_ID,
 };
-use menu::{Confirm, SecondaryConfirm, SelectFirst, SelectLast, SelectNext, SelectPrevious};
+use menu;
 use multi_buffer::ExcerptInfo;
 use notifications::status_toast::{StatusToast, ToastIcon};
 use panel::{
@@ -93,6 +93,14 @@ actions!(
         FocusEditor,
         /// Focuses on the changes list.
         FocusChanges,
+        /// Select next git panel menu item, and show it in the diff view
+        NextEntry,
+        /// Select previous git panel menu item, and show it in the diff view
+        PreviousEntry,
+        /// Select first git panel menu item, and show it in the diff view
+        FirstEntry,
+        /// Select last git panel menu item, and show it in the diff view
+        LastEntry,
         /// Toggles automatic co-author suggestions.
         ToggleFillCoAuthors,
         /// Toggles sorting entries by path vs status.
@@ -914,12 +922,12 @@ impl GitPanel {
 
         if let GitListEntry::Directory(dir_entry) = entry {
             if dir_entry.expanded {
-                self.select_next(&SelectNext, window, cx);
+                self.select_next(&menu::SelectNext, window, cx);
             } else {
                 self.toggle_directory(&dir_entry.key, window, cx);
             }
         } else {
-            self.select_next(&SelectNext, window, cx);
+            self.select_next(&menu::SelectNext, window, cx);
         }
     }
 
@@ -937,14 +945,19 @@ impl GitPanel {
             if dir_entry.expanded {
                 self.toggle_directory(&dir_entry.key, window, cx);
             } else {
-                self.select_previous(&SelectPrevious, window, cx);
+                self.select_previous(&menu::SelectPrevious, window, cx);
             }
         } else {
-            self.select_previous(&SelectPrevious, window, cx);
+            self.select_previous(&menu::SelectPrevious, window, cx);
         }
     }
 
-    fn select_first(&mut self, _: &SelectFirst, _window: &mut Window, cx: &mut Context<Self>) {
+    fn select_first(
+        &mut self,
+        _: &menu::SelectFirst,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
         let first_entry = match &self.view_mode {
             GitPanelViewMode::Flat => self
                 .entries
@@ -967,7 +980,7 @@ impl GitPanel {
 
     fn select_previous(
         &mut self,
-        _: &SelectPrevious,
+        _: &menu::SelectPrevious,
         _window: &mut Window,
         cx: &mut Context<Self>,
     ) {
@@ -1016,7 +1029,7 @@ impl GitPanel {
         self.scroll_to_selected_entry(cx);
     }
 
-    fn select_next(&mut self, _: &SelectNext, _window: &mut Window, cx: &mut Context<Self>) {
+    fn select_next(&mut self, _: &menu::SelectNext, _window: &mut Window, cx: &mut Context<Self>) {
         let item_count = self.entries.len();
         if item_count == 0 {
             return;
@@ -1054,13 +1067,50 @@ impl GitPanel {
         self.scroll_to_selected_entry(cx);
     }
 
-    fn select_last(&mut self, _: &SelectLast, _window: &mut Window, cx: &mut Context<Self>) {
+    fn select_last(&mut self, _: &menu::SelectLast, _window: &mut Window, cx: &mut Context<Self>) {
         if self.entries.last().is_some() {
             self.selected_entry = Some(self.entries.len() - 1);
             self.scroll_to_selected_entry(cx);
         }
     }
 
+    /// Show diff view at selected entry, only if the diff view is open
+    fn move_diff_to_entry(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        maybe!({
+            let workspace = self.workspace.upgrade()?;
+
+            if let Some(project_diff) = workspace.read(cx).item_of_type::<ProjectDiff>(cx) {
+                let entry = self.entries.get(self.selected_entry?)?.status_entry()?;
+
+                project_diff.update(cx, |project_diff, cx| {
+                    project_diff.move_to_entry(entry.clone(), window, cx);
+                });
+            }
+
+            Some(())
+        });
+    }
+
+    fn first_entry(&mut self, _: &FirstEntry, window: &mut Window, cx: &mut Context<Self>) {
+        self.select_first(&menu::SelectFirst, window, cx);
+        self.move_diff_to_entry(window, cx);
+    }
+
+    fn last_entry(&mut self, _: &LastEntry, window: &mut Window, cx: &mut Context<Self>) {
+        self.select_last(&menu::SelectLast, window, cx);
+        self.move_diff_to_entry(window, cx);
+    }
+
+    fn next_entry(&mut self, _: &NextEntry, window: &mut Window, cx: &mut Context<Self>) {
+        self.select_next(&menu::SelectNext, window, cx);
+        self.move_diff_to_entry(window, cx);
+    }
+
+    fn previous_entry(&mut self, _: &PreviousEntry, window: &mut Window, cx: &mut Context<Self>) {
+        self.select_previous(&menu::SelectPrevious, window, cx);
+        self.move_diff_to_entry(window, cx);
+    }
+
     fn focus_editor(&mut self, _: &FocusEditor, window: &mut Window, cx: &mut Context<Self>) {
         self.commit_editor.update(cx, |editor, cx| {
             window.focus(&editor.focus_handle(cx), cx);
@@ -1074,7 +1124,7 @@ impl GitPanel {
             .as_ref()
             .is_some_and(|active_repository| active_repository.read(cx).status_summary().count > 0);
         if have_entries && self.selected_entry.is_none() {
-            self.select_first(&SelectFirst, window, cx);
+            self.select_first(&menu::SelectFirst, window, cx);
         }
     }
 
@@ -4726,8 +4776,8 @@ impl GitPanel {
                     git::AddToGitignore.boxed_clone(),
                 )
                 .separator()
-                .action("Open Diff", Confirm.boxed_clone())
-                .action("Open File", SecondaryConfirm.boxed_clone())
+                .action("Open Diff", menu::Confirm.boxed_clone())
+                .action("Open File", menu::SecondaryConfirm.boxed_clone())
                 .separator()
                 .action_disabled_when(is_created, "View File History", Box::new(git::FileHistory))
         });
@@ -5390,6 +5440,10 @@ impl Render for GitPanel {
             .on_action(cx.listener(Self::select_next))
             .on_action(cx.listener(Self::select_previous))
             .on_action(cx.listener(Self::select_last))
+            .on_action(cx.listener(Self::first_entry))
+            .on_action(cx.listener(Self::next_entry))
+            .on_action(cx.listener(Self::previous_entry))
+            .on_action(cx.listener(Self::last_entry))
             .on_action(cx.listener(Self::close_panel))
             .on_action(cx.listener(Self::open_diff))
             .on_action(cx.listener(Self::open_file))
@@ -6855,7 +6909,7 @@ mod tests {
         // the Project Diff's active path.
         panel.update_in(cx, |panel, window, cx| {
             panel.selected_entry = Some(1);
-            panel.open_diff(&Confirm, window, cx);
+            panel.open_diff(&menu::Confirm, window, cx);
         });
         cx.run_until_parked();