gnome-shell-extensions/prefer-window-icon.patch

From 34d8854677513b016a08a04cdd9973b165146215 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Tue, 19 Mar 2024 13:16:50 +0100
Subject: [PATCH 1/2] window-list: Use more appropriate fallback icon

'icon-missing' is not an actual icon name. It somewhat works
because an invalid icon name will fallback to the correct
'image-missing', however for apps the generic app icon is
a better fallback.
---
 extensions/window-list/extension.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extensions/window-list/extension.js b/extensions/window-list/extension.js
index 91ee3e6b..1f112548 100644
--- a/extensions/window-list/extension.js
+++ b/extensions/window-list/extension.js
@@ -188,7 +188,7 @@ class WindowTitle extends St.BoxLayout {
             this._icon.child = app.create_icon_texture(ICON_TEXTURE_SIZE);
         } else {
             this._icon.child = new St.Icon({
-                icon_name: 'icon-missing',
+                icon_name: 'application-x-executable',
                 icon_size: ICON_TEXTURE_SIZE,
             });
         }
-- 
2.44.0


From 032cfb3593651c8344a59828a9c674f148329889 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Tue, 19 Mar 2024 14:07:12 +0100
Subject: [PATCH 2/2] window-list: Override with window icon if available

---
 extensions/window-list/extension.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/extensions/window-list/extension.js b/extensions/window-list/extension.js
index 1f112548..0c28692d 100644
--- a/extensions/window-list/extension.js
+++ b/extensions/window-list/extension.js
@@ -192,6 +192,23 @@ class WindowTitle extends St.BoxLayout {
                 icon_size: ICON_TEXTURE_SIZE,
             });
         }
+
+        // Override with window icon if available
+        if (this._hasWindowIcon()) {
+            const textureCache = St.TextureCache.get_default();
+            this._icon.child.gicon = textureCache.bind_cairo_surface_property(
+                this._metaWindow, 'icon');
+        }
+    }
+
+    _hasWindowIcon() {
+        // HACK: GI cannot handle CairoSurface, so this
+        // will throw if the icon property is null
+        try {
+            return this._metaWindow.icon !== null;
+        } catch (e) {
+            return true;
+        }
     }
 
     _onDestroy() {
-- 
2.44.0