[gnome-shell/wip/carlosg/magnifier-improvements: 6/11] magnifier: Transform a11y events' coordinates by scale factor

[Carlos Garnacho <carlosg src gnome org>]

commit 81b720719acde0ec8f4ee2befaa81eeb888d40f8
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Feb 6 10:59:20 2020 +0100

    magnifier: Transform a11y events' coordinates by scale factor
    
    We get those events in logical coordinates, which we have to transform
    into actual pixels.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/984

 js/ui/magnifier.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/js/ui/magnifier.js b/js/ui/magnifier.js
index 2154effc92..850cb8a261 100644
--- a/js/ui/magnifier.js
+++ b/js/ui/magnifier.js
@@ -799,8 +799,9 @@ var ZoomRegion = class ZoomRegion {
             return;
         }
 
-        let [xFocus, yFocus] = [extents.x + (extents.width / 2),
-                                extents.y + (extents.height / 2)];
+        let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
+        let [xFocus, yFocus] = [(extents.x + (extents.width / 2)) * scaleFactor,
+                                (extents.y + (extents.height / 2)) * scaleFactor];
 
         if (this._xFocus != xFocus || this._yFocus != yFocus) {
             [this._xFocus, this._yFocus] = [xFocus, yFocus];
@@ -820,7 +821,8 @@ var ZoomRegion = class ZoomRegion {
             return;
         }
 
-        let [xCaret, yCaret] = [extents.x, extents.y];
+        let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
+        let [xCaret, yCaret] = [extents.x * scaleFactor, extents.y * scaleFactor];
 
         if (this._xCaret != xCaret || this._yCaret != yCaret) {
             [this._xCaret, this._yCaret] = [xCaret, yCaret];