From f24676846822b40e7372036954774a15e167a786 Mon Sep 17 00:00:00 2001
From: Roman Gilg <subdiff@gmail.com>
Date: Thu, 2 Jan 2020 14:55:03 +0000
Subject: [PATCH] Inform Screens about size change

Summary:
Changes to a Wayland output that could affect the overall geometry
need to be communicated to the Screens class.

Test Plan: Compiles, runtime tested with other patches for rotation.

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D25900
---
 abstract_wayland_output.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/abstract_wayland_output.cpp b/abstract_wayland_output.cpp
index dbf551e31f..b4ce31ca10 100644
--- a/abstract_wayland_output.cpp
+++ b/abstract_wayland_output.cpp
@@ -18,6 +18,8 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 #include "abstract_wayland_output.h"
+
+#include "screens.h"
 #include "wayland_server.h"
 
 // KWayland
@@ -167,6 +169,7 @@ void AbstractWaylandOutput::applyChanges(const KWayland::Server::OutputChangeSet
 {
     qCDebug(KWIN_CORE) << "Apply changes to the Wayland output.";
     bool emitModeChanged = false;
+    bool overallSizeCheckNeeded = false;
 
     // Enablement changes are handled by platform.
     if (changeSet->modeChanged()) {
@@ -185,6 +188,7 @@ void AbstractWaylandOutput::applyChanges(const KWayland::Server::OutputChangeSet
         qCDebug(KWIN_CORE) << "Server setting position: " << changeSet->position();
         setGlobalPos(changeSet->position());
         // may just work already!
+        overallSizeCheckNeeded = true;
     }
     if (changeSet->scaleChanged()) {
         qCDebug(KWIN_CORE) << "Setting scale:" << changeSet->scale();
@@ -192,6 +196,11 @@ void AbstractWaylandOutput::applyChanges(const KWayland::Server::OutputChangeSet
         emitModeChanged = true;
     }
 
+    overallSizeCheckNeeded |= emitModeChanged;
+    if (overallSizeCheckNeeded) {
+        emit screens()->changed();
+    }
+
     if (emitModeChanged) {
         emit modeChanged();
     }