[gnome-shell-extensions/gnome-3-38] workspace-indicator: Account for monitor offset in window previews

[Florian Müllner <fmuellner src gnome org>]

commit 991f6ef508caad15398c0171199edcbab5fc3042
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Oct 21 20:24:18 2020 +0200

    workspace-indicator: Account for monitor offset in window previews
    
    Windows' frame rects are in screen coordinates, while the workspace
    thumbnails are based on the monitor work area. Unless we account
    for the difference, previews end up mispositioned in multi-monitor
    setups.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/142>
    
    (cherry picked from commit 6949a5d075ef773cfae289976d8b5713aad26508)

 extensions/workspace-indicator/extension.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/extensions/workspace-indicator/extension.js b/extensions/workspace-indicator/extension.js
index 6452eef..d10e13e 100644
--- a/extensions/workspace-indicator/extension.js
+++ b/extensions/workspace-indicator/extension.js
@@ -97,8 +97,8 @@ class WorkspaceLayout extends Clutter.LayoutManager {
                 Math.round(Math.min(frameRect.width, workArea.width) * hscale),
                 Math.round(Math.min(frameRect.height, workArea.height) * vscale));
             childBox.set_origin(
-                Math.round(frameRect.x * hscale),
-                Math.round(frameRect.y * vscale));
+                Math.round((frameRect.x - workArea.x) * hscale),
+                Math.round((frameRect.y - workArea.y) * vscale));
             child.allocate(childBox);
         }
     }