Render a close tab button on tab hover

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

gpui/src/elements/mouse_event_handler.rs

@@ -12,8 +12,8 @@ pub struct MouseEventHandler {
 
 #[derive(Clone, Copy, Debug, Default)]
 pub struct MouseState {
-    hovered: bool,
-    clicked: bool,
+    pub hovered: bool,
+    pub clicked: bool,
 }
 
 impl MouseEventHandler {

gpui/src/elements/svg.rs

@@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use serde_json::json;
 
 use crate::{
@@ -11,14 +13,14 @@ use crate::{
 };
 
 pub struct Svg {
-    path: String,
+    path: Cow<'static, str>,
     color: ColorU,
 }
 
 impl Svg {
-    pub fn new(path: String) -> Self {
+    pub fn new(path: impl Into<Cow<'static, str>>) -> Self {
         Self {
-            path,
+            path: path.into(),
             color: ColorU::black(),
         }
     }

gpui/src/platform/mac/sprite_cache.rs

@@ -9,7 +9,7 @@ use crate::{
 use etagere::BucketedAtlasAllocator;
 use metal::{MTLPixelFormat, TextureDescriptor};
 use ordered_float::OrderedFloat;
-use std::{collections::HashMap, sync::Arc};
+use std::{borrow::Cow, collections::HashMap, sync::Arc};
 
 #[derive(Hash, Eq, PartialEq)]
 struct GlyphDescriptor {
@@ -29,7 +29,7 @@ pub struct GlyphSprite {
 
 #[derive(Hash, Eq, PartialEq)]
 struct IconDescriptor {
-    path: String,
+    path: Cow<'static, str>,
     width: i32,
     height: i32,
 }
@@ -138,7 +138,7 @@ impl SpriteCache {
     pub fn render_icon(
         &mut self,
         size: Vector2F,
-        path: String,
+        path: Cow<'static, str>,
         svg: usvg::Tree,
         scale_factor: f32,
     ) -> IconSprite {

gpui/src/scene.rs

@@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use serde_json::json;
 
 use crate::{
@@ -51,7 +53,7 @@ pub struct Glyph {
 pub struct Icon {
     pub bounds: RectF,
     pub svg: usvg::Tree,
-    pub path: String,
+    pub path: Cow<'static, str>,
     pub color: ColorU,
 }