pane: Add settings to hide the tab bar buttons (#23752)

This PR adds the `show_tab_bar_buttons` under `tab_bar` that allows
hiding the "New", "Split Pane", and "Zoom" buttons to the left of the
pane tab bar.

Release Notes:

- Added a new `show_tab_bar_buttons` setting, under `tab_bar`, that
enables hiding the pane tab bar buttons.

assets/settings/default.json

@@ -592,7 +592,9 @@
     // Whether or not to show the tab bar in the editor
     "show": true,
     // Whether or not to show the navigation history buttons.
-    "show_nav_history_buttons": true
+    "show_nav_history_buttons": true,
+    /// Whether or not to show the tab bar buttons.
+    "show_tab_bar_buttons": true
   },
   // Settings related to the editor's tabs
   "tabs": {

crates/workspace/src/pane.rs

@@ -304,6 +304,7 @@ pub struct Pane {
             &mut Context<Pane>,
         ) -> (Option<AnyElement>, Option<AnyElement>),
     >,
+    show_tab_bar_buttons: bool,
     _subscriptions: Vec<Subscription>,
     tab_bar_scroll_handle: ScrollHandle,
     /// Is None if navigation buttons are permanently turned off (and should not react to setting changes).
@@ -509,6 +510,7 @@ impl Pane {
                     .into();
                 (None, right_children)
             }),
+            show_tab_bar_buttons: TabBarSettings::get_global(cx).show_tab_bar_buttons,
             display_nav_history_buttons: Some(
                 TabBarSettings::get_global(cx).show_nav_history_buttons,
             ),
@@ -659,9 +661,13 @@ impl Pane {
     }
 
     fn settings_changed(&mut self, cx: &mut Context<Self>) {
+        let tab_bar_settings = TabBarSettings::get_global(cx);
+
         if let Some(display_nav_history_buttons) = self.display_nav_history_buttons.as_mut() {
-            *display_nav_history_buttons = TabBarSettings::get_global(cx).show_nav_history_buttons;
+            *display_nav_history_buttons = tab_bar_settings.show_nav_history_buttons;
         }
+        self.show_tab_bar_buttons = tab_bar_settings.show_tab_bar_buttons;
+
         if !PreviewTabsSettings::get_global(cx).enabled {
             self.preview_item_id = None;
         }
@@ -2581,12 +2587,15 @@ impl Pane {
                 },
             )
             .map(|tab_bar| {
-                let render_tab_buttons = self.render_tab_bar_buttons.clone();
-                let (left_children, right_children) = render_tab_buttons(self, window, cx);
-
-                tab_bar
-                    .start_children(left_children)
-                    .end_children(right_children)
+                if self.show_tab_bar_buttons {
+                    let render_tab_buttons = self.render_tab_bar_buttons.clone();
+                    let (left_children, right_children) = render_tab_buttons(self, window, cx);
+                    tab_bar
+                        .start_children(left_children)
+                        .end_children(right_children)
+                } else {
+                    tab_bar
+                }
             })
             .children(pinned_tabs.len().ne(&0).then(|| {
                 h_flex()

crates/workspace/src/workspace_settings.rs

@@ -147,6 +147,7 @@ pub struct WorkspaceSettingsContent {
 pub struct TabBarSettings {
     pub show: bool,
     pub show_nav_history_buttons: bool,
+    pub show_tab_bar_buttons: bool,
 }
 
 #[derive(Clone, Default, Serialize, Deserialize, JsonSchema)]
@@ -159,6 +160,10 @@ pub struct TabBarSettingsContent {
     ///
     /// Default: true
     pub show_nav_history_buttons: Option<bool>,
+    /// Whether or not to show the tab bar buttons.
+    ///
+    /// Default: true
+    pub show_tab_bar_buttons: Option<bool>,
 }
 
 #[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq, JsonSchema)]

docs/src/configuring-zed.md

@@ -714,7 +714,8 @@ List of `string` values
 ```json
 "tab_bar": {
   "show": true,
-  "show_nav_history_buttons": true
+  "show_nav_history_buttons": true,
+  "show_tab_bar_buttons": true
 }
 ```
 
@@ -738,6 +739,16 @@ List of `string` values
 
 `boolean` values
 
+### Tab Bar Buttons
+
+- Description: Whether or not to show the tab bar buttons.
+- Setting: `show_tab_bar_buttons`
+- Default: `true`
+
+**Options**
+
+`boolean` values
+
 ## Editor Tabs
 
 - Description: Configuration for the editor tabs.