Add active pane magnification setting which grows the active pane making it easier to see it's contents

assets/settings/default.json

@@ -5,6 +5,9 @@
     "buffer_font_family": "Zed Mono",
     // The default font size for text in the editor
     "buffer_font_size": 15,
+    // The factor to grow the active pane by. Defaults to 1.0
+    // which gives the same size as all other panes.
+    "active_pane_magnification": 1.0,
     // Whether to enable vim modes and key bindings
     "vim_mode": false,
     // Whether to show the informational hover box when moving the mouse

crates/settings/src/settings.rs

@@ -28,6 +28,7 @@ pub struct Settings {
     pub buffer_font_family: FamilyId,
     pub default_buffer_font_size: f32,
     pub buffer_font_size: f32,
+    pub active_pane_magnification: f32,
     pub cursor_blink: bool,
     pub hover_popover_enabled: bool,
     pub show_completions_on_input: bool,
@@ -235,6 +236,8 @@ pub struct SettingsFileContent {
     #[serde(default)]
     pub buffer_font_size: Option<f32>,
     #[serde(default)]
+    pub active_pane_magnification: Option<f32>,
+    #[serde(default)]
     pub cursor_blink: Option<bool>,
     #[serde(default)]
     pub hover_popover_enabled: Option<bool>,
@@ -294,6 +297,7 @@ impl Settings {
                 .load_family(&[defaults.buffer_font_family.as_ref().unwrap()])
                 .unwrap(),
             buffer_font_size: defaults.buffer_font_size.unwrap(),
+            active_pane_magnification: defaults.active_pane_magnification.unwrap(),
             default_buffer_font_size: defaults.buffer_font_size.unwrap(),
             cursor_blink: defaults.cursor_blink.unwrap(),
             hover_popover_enabled: defaults.hover_popover_enabled.unwrap(),
@@ -349,6 +353,10 @@ impl Settings {
             data.projects_online_by_default,
         );
         merge(&mut self.buffer_font_size, data.buffer_font_size);
+        merge(
+            &mut self.active_pane_magnification,
+            data.active_pane_magnification,
+        );
         merge(&mut self.default_buffer_font_size, data.buffer_font_size);
         merge(&mut self.cursor_blink, data.cursor_blink);
         merge(&mut self.hover_popover_enabled, data.hover_popover_enabled);
@@ -440,6 +448,7 @@ impl Settings {
             experiments: FeatureFlags::default(),
             buffer_font_family: cx.font_cache().load_family(&["Monaco"]).unwrap(),
             buffer_font_size: 14.,
+            active_pane_magnification: 1.,
             default_buffer_font_size: 14.,
             cursor_blink: true,
             hover_popover_enabled: true,

crates/workspace/src/pane_group.rs

@@ -6,6 +6,7 @@ use gpui::{
 };
 use project::Project;
 use serde::Deserialize;
+use settings::Settings;
 use theme::Theme;
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -61,10 +62,17 @@ impl PaneGroup {
         theme: &Theme,
         follower_states: &FollowerStatesByLeader,
         active_call: Option<&ModelHandle<ActiveCall>>,
+        active_pane: &ViewHandle<Pane>,
         cx: &mut RenderContext<Workspace>,
     ) -> ElementBox {
-        self.root
-            .render(project, theme, follower_states, active_call, cx)
+        self.root.render(
+            project,
+            theme,
+            follower_states,
+            active_call,
+            active_pane,
+            cx,
+        )
     }
 
     pub(crate) fn panes(&self) -> Vec<&ViewHandle<Pane>> {
@@ -102,12 +110,20 @@ impl Member {
         Member::Axis(PaneAxis { axis, members })
     }
 
+    fn contains(&self, needle: &ViewHandle<Pane>) -> bool {
+        match self {
+            Member::Axis(axis) => axis.members.iter().any(|member| member.contains(needle)),
+            Member::Pane(pane) => pane == needle,
+        }
+    }
+
     pub fn render(
         &self,
         project: &ModelHandle<Project>,
         theme: &Theme,
         follower_states: &FollowerStatesByLeader,
         active_call: Option<&ModelHandle<ActiveCall>>,
+        active_pane: &ViewHandle<Pane>,
         cx: &mut RenderContext<Workspace>,
     ) -> ElementBox {
         enum FollowIntoExternalProject {}
@@ -234,7 +250,14 @@ impl Member {
                     .with_children(prompt)
                     .boxed()
             }
-            Member::Axis(axis) => axis.render(project, theme, follower_states, active_call, cx),
+            Member::Axis(axis) => axis.render(
+                project,
+                theme,
+                follower_states,
+                active_call,
+                active_pane,
+                cx,
+            ),
         }
     }
 
@@ -340,12 +363,19 @@ impl PaneAxis {
         theme: &Theme,
         follower_state: &FollowerStatesByLeader,
         active_call: Option<&ModelHandle<ActiveCall>>,
+        active_pane: &ViewHandle<Pane>,
         cx: &mut RenderContext<Workspace>,
     ) -> ElementBox {
         let last_member_ix = self.members.len() - 1;
         Flex::new(self.axis)
             .with_children(self.members.iter().enumerate().map(|(ix, member)| {
-                let mut member = member.render(project, theme, follower_state, active_call, cx);
+                let mut flex = 1.0;
+                if member.contains(active_pane) {
+                    flex = cx.global::<Settings>().active_pane_magnification;
+                }
+
+                let mut member =
+                    member.render(project, theme, follower_state, active_call, active_pane, cx);
                 if ix < last_member_ix {
                     let mut border = theme.workspace.pane_divider;
                     border.left = false;
@@ -359,7 +389,7 @@ impl PaneAxis {
                     member = Container::new(member).with_border(border).boxed();
                 }
 
-                FlexItem::new(member).flex(1.0, true).boxed()
+                FlexItem::new(member).flex(flex, true).boxed()
             }))
             .boxed()
     }

crates/workspace/src/workspace.rs

@@ -2670,6 +2670,7 @@ impl View for Workspace {
                                                         &theme,
                                                         &self.follower_states_by_leader,
                                                         self.active_call(),
+                                                        self.active_pane(),
                                                         cx,
                                                     ))
                                                     .flex(1., true)