tor-browser

commit 056935cb094f910b39d0b16bf89748eff0287d78
parent fecb7d40d1af2a27478fdd341b356f76efd6c244
Author: Emilio Cobos Álvarez <emilio@crisal.io>
Date:   Tue,  4 Nov 2025 17:36:02 +0000

Bug 1998223 - Optimize WidgetToWidgetOffset for the same-widget case. r=jwatt

No behavior change.

Differential Revision: https://phabricator.services.mozilla.com/D271258

Diffstat:
M
layout/base/nsLayoutUtils.cpp
 | 
3
+++

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/layout/base/nsLayoutUtils.cpp b/layout/base/nsLayoutUtils.cpp
@@ -2396,6 +2396,9 @@ nsRect nsLayoutUtils::TransformFrameRectToAncestor(
 
 LayoutDeviceIntPoint nsLayoutUtils::WidgetToWidgetOffset(nsIWidget* aFrom,
                                                          nsIWidget* aTo) {
+  if (aFrom == aTo) {
+    return {};
+  }
   auto fromOffset = aFrom->WidgetToScreenOffset();
   auto toOffset = aTo->WidgetToScreenOffset();
   return fromOffset - toOffset;