From 6a777e320079184a4ab3aee56c1d51b28f554102 Mon Sep 17 00:00:00 2001
From: Tristan Tarrant <tristan@infinispan.org>
Date: Tue, 25 Aug 2026 16:25:52 +0200
Subject: [PATCH] [#604] GNOME 51 support

---
 resources/metadata.json |  3 ++-
 src/extension.ts        | 21 ++++-----------------
 src/utils/ui.ts         | 33 ++++++++++++++++++++++++++++++++-
 3 files changed, 38 insertions(+), 19 deletions(-)

diff --git a/resources/metadata.json b/resources/metadata.json
index e58a93c7..410b7caf 100644
--- a/resources/metadata.json
+++ b/resources/metadata.json
@@ -11,7 +11,8 @@
     "47",
     "48",
     "49",
-    "50"
+    "50",
+    "51"
   ],
   "version": 99,
   "version-name": "17.3",
diff --git a/src/extension.ts b/src/extension.ts
index eee13a99..c1c7c3b5 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -27,6 +27,7 @@ import {
     filterUnfocusableWindows,
     getMonitors,
     getWindows,
+    isFractionalScalingEnabled,
     squaredEuclideanDistance,
 } from './utils/ui';
 import * as Main from 'resource:///org/gnome/shell/ui/main.js';
@@ -132,7 +133,7 @@ export default class TilingShellExtension extends Extension {
         // force initialization and tracking of windows
         TilingShellWindowManager.get();
 
-        this._fractionalScalingEnabled = this._isFractionalScalingEnabled(
+        this._fractionalScalingEnabled = isFractionalScalingEnabled(
             new Gio.Settings({ schema: 'org.gnome.mutter' }),
         );
 
@@ -226,7 +227,7 @@ export default class TilingShellExtension extends Extension {
                 if (!_mutterSettings) return;
 
                 const fractionalScalingEnabled =
-                    this._isFractionalScalingEnabled(_mutterSettings);
+                    isFractionalScalingEnabled(_mutterSettings);
 
                 if (this._fractionalScalingEnabled === fractionalScalingEnabled)
                     return;
@@ -240,7 +241,7 @@ export default class TilingShellExtension extends Extension {
                 if (this._windowBorderManager)
                     this._windowBorderManager.destroy();
                 this._windowBorderManager = new WindowBorderManager(
-                    this._fractionalScalingEnabled,
+                    !this._fractionalScalingEnabled,
                 );
                 this._windowBorderManager.enable();
             },
@@ -748,20 +749,6 @@ export default class TilingShellExtension extends Extension {
         monitorTilingManager.onUntileWindow(focus_window, true);
     }
 
-    private _isFractionalScalingEnabled(
-        _mutterSettings: Gio.Settings,
-    ): boolean {
-        return (
-            _mutterSettings
-                .get_strv('experimental-features')
-                .find(
-                    (feat) =>
-                        feat === 'scale-monitor-framebuffer' ||
-                        feat === 'x11-randr-fractional-scaling',
-                ) !== undefined
-        );
-    }
-
     disable(): void {
         // bring back overridden keybindings
         this._keybindings?.destroy();
diff --git a/src/utils/ui.ts b/src/utils/ui.ts
index 76cea4ed..c183bbcb 100644
--- a/src/utils/ui.ts
+++ b/src/utils/ui.ts
@@ -1,9 +1,40 @@
-import { St, Meta, Mtk, Clutter } from '../gi/ext';
+import { St, Meta, Mtk, Clutter, Gio, GLib } from '../gi/ext';
 import * as Main from 'resource:///org/gnome/shell/ui/main.js';
 import { Monitor } from 'resource:///org/gnome/shell/ui/layout.js';
+import * as Config from 'resource:///org/gnome/shell/misc/config.js';
 
 export const getMonitors = (): Monitor[] => Main.layoutManager.monitors;
 
+export const isFractionalScalingEnabled = (
+    mutterSettings: Gio.Settings,
+): boolean => {
+    // Since GNOME 49, fractional scaling (the logical monitor layout mode) is
+    // enabled by default on Wayland and is no longer an experimental feature
+    const GNOME_VERSION_MAJOR = Number(Config.PACKAGE_VERSION.split('.')[0]);
+    // Meta.is_wayland_compositor() was removed in newer GNOME versions
+    const isWayland = Meta.is_wayland_compositor
+        ? Meta.is_wayland_compositor()
+        : GLib.getenv('XDG_SESSION_TYPE') === 'wayland';
+    if (isWayland && GNOME_VERSION_MAJOR >= 49) return true;
+
+    // The experimental-features key was removed from the org.gnome.mutter
+    // schema in mutter 51, so only read it when the schema still has it
+    const source = Gio.SettingsSchemaSource.get_default();
+    const schema = source?.lookup('org.gnome.mutter', true);
+    if (!schema || !schema.list_keys().includes('experimental-features'))
+        return false;
+
+    return (
+        mutterSettings
+            .get_strv('experimental-features')
+            .find(
+                (feat) =>
+                    feat === 'scale-monitor-framebuffer' ||
+                    feat === 'x11-randr-fractional-scaling',
+            ) !== undefined
+    );
+};
+
 export const isPointInsideRect = (
     point: { x: number; y: number },
     rect: Mtk.Rectangle,