From 6810b0f66a34056bfe0da7299d7a768e700e58f5 Mon Sep 17 00:00:00 2001
From: Jan Grulich <jgrulich@redhat.com>
Date: Thu, 11 Feb 2021 15:12:32 +0100
Subject: [PATCH 16/36] Get correct decoration margins region

Size we use to calculate margins region already contains size including
margins. This resulted into bigger region and not properly damaging
region we need to update.

Pick-to: 5.15 6.0 6.1
Change-Id: Id1b7f4cd2a7b894b82db09c5af2b2d1f1f43fa2a
Reviewed-by: David Edmundson <davidedmundson@kde.org>
---
 src/client/qwaylandabstractdecoration.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/client/qwaylandabstractdecoration.cpp b/src/client/qwaylandabstractdecoration.cpp
index 87dd6cea..b6ee43c9 100644
--- a/src/client/qwaylandabstractdecoration.cpp
+++ b/src/client/qwaylandabstractdecoration.cpp
@@ -108,11 +108,11 @@ void QWaylandAbstractDecoration::setWaylandWindow(QWaylandWindow *window)
 static QRegion marginsRegion(const QSize &size, const QMargins &margins)
 {
     QRegion r;
-    const int widthWithMargins = margins.left() + size.width() + margins.right();
-    r += QRect(0, 0, widthWithMargins, margins.top()); // top
-    r += QRect(0, size.height()+margins.top(), widthWithMargins, margins.bottom()); //bottom
+
+    r += QRect(0, 0, size.width(), margins.top()); // top
+    r += QRect(0, size.height()-margins.bottom(), size.width(), margins.bottom()); //bottom
     r += QRect(0, margins.top(), margins.left(), size.height()); //left
-    r += QRect(size.width()+margins.left(), margins.top(), margins.right(), size.height()); // right
+    r += QRect(size.width()-margins.left(), margins.top(), margins.right(), size.height()-margins.top()); // right
     return r;
 }
 
-- 
2.33.1