From: Florian Müllner <fmuellner@gnome.org>
Date: Thu, 29 Jul 2021 19:56:57 +0000 (+0200)
Subject: magnifier: Don't query pointer unless necessary
X-Git-Tag: archive/raspbian/50.5-1+rpi1~1^2~574^2^2~161
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=1ea4d72fe5316585578913ba329874a444a1d7f4;p=gnome-shell.git

magnifier: Don't query pointer unless necessary

The PointerWatcher passes the current pointer position to every watch,
so we don't have to query the pointer again scrollToMousePos() is used
as watch callback.

While that should be the only use, be conservative and still query the
pointer when called without arguments.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1932>
---

diff --git a/js/ui/magnifier.js b/js/ui/magnifier.js
index 08466b9a0..f170bbed0 100644
--- a/js/ui/magnifier.js
+++ b/js/ui/magnifier.js
@@ -230,8 +230,8 @@ var Magnifier = class Magnifier {
      * system pointer.
      * @returns {bool} true.
      */
-    scrollToMousePos() {
-        let [xMouse, yMouse] = global.get_pointer();
+    scrollToMousePos(...args) {
+        const [xMouse, yMouse] = args.length ? args : global.get_pointer();
 
         if (xMouse != this.xMouse || yMouse != this.yMouse) {
             this.xMouse = xMouse;