chore: drop tab icon in favor of lead

crates/core/Cargo.toml

@@ -63,8 +63,8 @@ badge = []
 input = ["button"]
 clipboard = ["button"]
 popover = []
-scroll_area = []
-scrollbar = ["scroll_area"]
+scroll_area = ["scrollbar"]
+scrollbar = []
 segmented = []
 separator = []
 spinner = []

crates/data/src/tabs.rs

@@ -10,7 +10,7 @@ use gpui_native_core::button::{Button, ButtonVariant};
 use gpui_native_core::common::Sizable as _;
 use gpui_native_core::spinner::Spinner;
 use gpui_native_core::tooltip::Tooltip;
-use gpui_native_icons::{Icon, IconRole};
+use gpui_native_icons::IconRole;
 use gpui_native_theme::{ActiveTheme as _, Size};
 use gpui_native_utils::adjacent_selectable;
 
@@ -35,7 +35,6 @@ pub struct Tab {
     /// The stable identity for element state; must survive reordering.
     key: ElementId,
     label: SharedString,
-    icon: Option<Icon>,
     lead: Option<AnyElement>,
     busy: bool,
     disabled: bool,
@@ -53,7 +52,6 @@ impl Tab {
         Self {
             key: key.into(),
             label: label.into(),
-            icon: None,
             lead: None,
             busy: false,
             disabled: false,
@@ -62,16 +60,7 @@ impl Tab {
         }
     }
 
-    /// Shows an icon leading the label.
-    pub fn icon<I>(mut self, icon: I) -> Self
-    where
-        I: Into<Icon>,
-    {
-        self.icon = Some(icon.into());
-        self
-    }
-
-    /// Sets the leading element.
+    /// Sets the leading element, e.g. an icon or an avatar.
     pub fn lead<E>(mut self, lead: E) -> Self
     where
         E: IntoElement + 'static,
@@ -346,22 +335,9 @@ fn render_tab(
             }),
     };
 
-    let lead = tab.lead.take();
-    let icon = tab.icon.take();
-
-    strip_tab = match lead {
-        Some(lead) => strip_tab.child(lead),
-        None => match variant {
-            TabsVariant::Underline => {
-                strip_tab.child(div().flex_none().pb_0p5().when_some(icon, |slot, icon| {
-                    slot.child(icon.size(metrics.dense_icon_size).color(label_color))
-                }))
-            }
-            TabsVariant::Pill => strip_tab.when_some(icon, |strip_tab, icon| {
-                strip_tab.child(icon.size(metrics.dense_icon_size).color(label_color))
-            }),
-        },
-    };
+    if let Some(lead) = tab.lead.take() {
+        strip_tab = strip_tab.child(lead);
+    }
 
     strip_tab = strip_tab.child(tab.label.clone());
 

crates/layout/src/dock.rs

@@ -1038,12 +1038,15 @@ fn render_pane(
             .selected(selected)
             .tabs({
                 let tabs = pane.tabs.clone();
-                move |_, _| {
+                move |_, cx| {
+                    let theme = cx.theme();
+                    let metrics = theme.sizes.resolve(Size::default());
+
                     tabs.iter()
                         .map(|tab| {
                             let mut entry = Tab::new(tab.panel.clone(), tab.title.clone());
                             if let Some(icon) = tab.icon.clone() {
-                                entry = entry.icon(icon);
+                                entry = entry.lead(icon.size(metrics.icon_size));
                             }
                             entry.closeable(true).wrap({
                                 let panel = tab.panel.clone();