feat: support app-defined icon sets

crates/data/src/tree.rs

@@ -6,7 +6,7 @@ use gpui::{
     ParentElement as _, RenderOnce, Role, SharedString, StatefulInteractiveElement as _,
     Styled as _, Window, div,
 };
-use gpui_native_icons::{IconRole, icon};
+use gpui_native_icons::{Icon, IconRole, icon};
 use gpui_native_theme::ActiveTheme as _;
 use gpui_native_utils::{nav_key, paint_selectable_row, selectable_label_color};
 
@@ -20,7 +20,7 @@ type ItemsFn = Box<dyn Fn(&mut Window, &mut App) -> Vec<TreeItem>>;
 #[derive(Clone)]
 pub struct TreeItem {
     label: SharedString,
-    icon: Option<IconRole>,
+    icon: Option<Icon>,
     depth: usize,
     expandable: bool,
     expanded: bool,
@@ -44,8 +44,11 @@ impl TreeItem {
     }
 
     /// Shows an icon leading the label.
-    pub fn icon(mut self, role: IconRole) -> Self {
-        self.icon = Some(role);
+    pub fn icon<I>(mut self, icon: I) -> Self
+    where
+        I: Into<Icon>,
+    {
+        self.icon = Some(icon.into());
         self
     }
 
@@ -317,12 +320,8 @@ fn render_row(
             selected,
             on_disclosure,
         ))
-        .when_some(item.icon, |row, role| {
-            row.child(
-                icon(role)
-                    .size(theme.sizes.medium.icon_size)
-                    .color(label_color),
-            )
+        .when_some(item.icon.clone(), |row, icon| {
+            row.child(icon.size(theme.sizes.medium.icon_size).color(label_color))
         })
         .child(
             div()