[gnome-shell] lookingGlass: Replace global grabs with input device grabs

[Florian Müllner <fmuellner src gnome org>]

commit 6c33aff6d1b0e0620b7156a67a38bd99204347d2
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Sun Apr 14 18:32:11 2019 +0200

    lookingGlass: Replace global grabs with input device grabs
    
    Global grabs are being removed from Clutter in favour of input device
    grabs.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/495

 js/ui/lookingGlass.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/lookingGlass.js b/js/ui/lookingGlass.js
index 4e5b988ba..e191b509e 100644
--- a/js/ui/lookingGlass.js
+++ b/js/ui/lookingGlass.js
@@ -491,8 +491,13 @@ var Inspector = GObject.registerClass({
         eventHandler.connect('button-press-event', this._onButtonPressEvent.bind(this));
         eventHandler.connect('scroll-event', this._onScrollEvent.bind(this));
         eventHandler.connect('motion-event', this._onMotionEvent.bind(this));
-        Clutter.grab_pointer(eventHandler);
-        Clutter.grab_keyboard(eventHandler);
+
+        let dm = Clutter.DeviceManager.get_default();
+        this._pointerDevice = dm.get_core_device(Clutter.InputDeviceType.POINTER_DEVICE);
+        this._keyboardDevice = dm.get_core_device(Clutter.InputDeviceType.KEYBOARD_DEVICE);
+
+        this._pointerDevice.grab(eventHandler);
+        this._keyboardDevice.grab(eventHandler);
 
         // this._target is the actor currently shown by the inspector.
         // this._pointerTarget is the actor directly under the pointer.
@@ -525,8 +530,8 @@ var Inspector = GObject.registerClass({
     }
 
     _close() {
-        Clutter.ungrab_pointer();
-        Clutter.ungrab_keyboard();
+        this._pointerDevice.ungrab();
+        this._keyboardDevice.ungrab();
         this._eventHandler.destroy();
         this._eventHandler = null;
         this.emit('closed');