lets go

gui/gnome/autocustom-gnome-macos/res/extensions/blur-my-shell@aunetx/dbus/client.js

@@ -0,0 +1,58 @@
+import Gio from 'gi://Gio';
+
+const bus_name = 'org.gnome.Shell';
+const iface_name = 'dev.aunetx.BlurMyShell';
+const obj_path = '/dev/aunetx/BlurMyShell';
+
+
+/// Call pick() from the DBus service, it will open the Inspector from
+/// gnome-shell to pick an actor on stage.
+export function pick() {
+    Gio.DBus.session.call(
+        bus_name,
+        obj_path,
+        iface_name,
+        'pick',
+        null,
+        null,
+        Gio.DBusCallFlags.NO_AUTO_START,
+        -1,
+        null,
+        null
+    );
+}
+
+/// Connect to DBus 'picking' signal, which will be emitted when the inspector
+/// is picking a window.
+export function on_picking(cb) {
+    const id = Gio.DBus.session.signal_subscribe(
+        bus_name,
+        iface_name,
+        'picking',
+        obj_path,
+        null,
+        Gio.DBusSignalFlags.NONE,
+        _ => {
+            cb();
+            Gio.DBus.session.signal_unsubscribe(id);
+        }
+    );
+}
+
+/// Connect to DBus 'picked' signal, which will be emitted when a window is
+/// picked.
+export function on_picked(cb) {
+    const id = Gio.DBus.session.signal_subscribe(
+        bus_name,
+        iface_name,
+        'picked',
+        obj_path,
+        null,
+        Gio.DBusSignalFlags.NONE,
+        (conn, sender, obj_path, iface, signal, params) => {
+            const val = params.get_child_value(0);
+            cb(val.get_string()[0]);
+            Gio.DBus.session.signal_unsubscribe(id);
+        }
+    );
+}

gui/gnome/autocustom-gnome-macos/res/extensions/blur-my-shell@aunetx/dbus/iface.xml

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+<node>
+  <interface name="dev.aunetx.BlurMyShell">
+    <!-- This method is called in preferences to pick a window -->
+    <method name="pick" />
+    <!-- When window is picking, send a signal to preferences -->
+    <signal name="picking"></signal>
+    <!-- If window is picked, send a signal to preferences -->
+    <signal name="picked">
+      <arg name="window" type="s" />
+    </signal>
+  </interface>
+</node>

gui/gnome/autocustom-gnome-macos/res/extensions/blur-my-shell@aunetx/dbus/services.js

@@ -0,0 +1,93 @@
+import Gio from 'gi://Gio';
+import GLib from 'gi://GLib';
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import * as LookingGlass from 'resource:///org/gnome/shell/ui/lookingGlass.js';
+
+
+export const ApplicationsService = class ApplicationsService {
+    constructor() {
+        let decoder = new TextDecoder();
+        let path = GLib.filename_from_uri(GLib.uri_resolve_relative(
+            import.meta.url, 'iface.xml', GLib.UriFlags.NONE)
+        )[0];
+        let [, buffer] = GLib.file_get_contents(path);
+        let iface = decoder.decode(buffer);
+        GLib.free(buffer);
+
+        this.DBusImpl = Gio.DBusExportedObject.wrapJSObject(iface, this);
+    }
+
+    /// Pick Window for Preferences Page, exported to DBus client.
+    pick() {
+        // emit `picking` signal to know we are listening
+        const send_picking_signal = _ =>
+            this.DBusImpl.emit_signal(
+                'picking',
+                null
+            );
+
+        // emit `picked` signal to send wm_class
+        const send_picked_signal = wm_class =>
+            this.DBusImpl.emit_signal(
+                'picked',
+                new GLib.Variant('(s)', [wm_class])
+            );
+
+        // notify the preferences that we are listening
+        send_picking_signal();
+
+        // A very interesting way to pick a window:
+        // 1. Open LookingGlass to mask all event handles of window
+        // 2. Use inspector to pick window, thats is also lookingGlass do
+        // 3. Close LookingGlass when done
+        // It will restore event handles of window
+
+        // open then hide LookingGlass
+        const looking_class = Main.createLookingGlass();
+        looking_class.open();
+        looking_class.hide();
+
+        // inspect window now
+        const inspector = new LookingGlass.Inspector(Main.createLookingGlass());
+        inspector.connect('target', (me, target, x, y) => {
+            // remove border effect when window is picked.
+            const effect_name = 'lookingGlass_RedBorderEffect';
+            target
+                .get_effects()
+                .filter(e => e.toString().includes(effect_name))
+                .forEach(e => target.remove_effect(e));
+
+            // get wm_class_instance property of window, then pass it to DBus
+            // client
+            const type_str = target.toString();
+
+            let actor = target;
+            if (type_str.includes('MetaSurfaceActor'))
+                actor = target.get_parent();
+
+            if (!actor.toString().includes('WindowActor'))
+                actor = actor.get_parent();
+
+            if (!actor.toString().includes('WindowActor'))
+                return send_picked_signal('window-not-found');
+
+            send_picked_signal(
+                actor.meta_window.get_wm_class() ?? 'window-not-found'
+            );
+        });
+
+        // close LookingGlass when we're done
+        inspector.connect('closed', _ => looking_class.close());
+    }
+
+    export() {
+        this.DBusImpl.export(
+            Gio.DBus.session,
+            '/dev/aunetx/BlurMyShell'
+        );
+    };
+
+    unexport() {
+        this.DBusImpl.unexport();
+    }
+};