File 0003-Send-SurfaceCreated-and-SurfaceAboutToBeDestroyed-ev.patch of Package libqt5-qtwayland

From 4e8bcdd2930291c87bab4dbe0699e8e696394b6b Mon Sep 17 00:00:00 2001
From: Johan Klokkhammer Helsing <johan.helsing@qt.io>
Date: Mon, 29 May 2017 15:44:12 +0200
Subject: [PATCH 3/3] Send SurfaceCreated and SurfaceAboutToBeDestroyed events
 for wl_surface

Previously, the events were matching the life cycle of QWaylandWindow. This
commit changes it so the events are matching the life cycle of wl_surfaces
instead (a QWaylandWindow can outlive several wl_surfaces).

Some of these events were already sent in QWindowPrivate (the first and last).
Now we handle the cases where the wl_surface is destroyed and recreated due to
hiding/showing the window or when changing the role of the wl_surface.

Task-number: QTBUG-58423
Change-Id: Ie4a4e7dd529e1a41a2cf42e02cebb3c8aca4a4cc
Reviewed-by: Giulio Camuffo <giulio.camuffo@kdab.com>
Reviewed-by: Marco Martin <notmart@gmail.com>
---
 src/client/qwaylandwindow.cpp | 13 ++++++++++---
 src/client/qwaylandwindow_p.h |  2 +-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index c7490532..ce53c396 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -111,7 +111,7 @@ QWaylandWindow::~QWaylandWindow()
     delete mWindowDecoration;
 
     if (isInitialized())
-        reset();
+        reset(false);
 
     QList<QWaylandInputDevice *> inputDevices = mDisplay->inputDevices();
     for (int i = 0; i < inputDevices.size(); ++i)
@@ -139,8 +139,11 @@ void QWaylandWindow::initWindow()
     if (window()->type() == Qt::Desktop)
         return;
 
-    if (!isInitialized())
+    if (!isInitialized()) {
         initializeWlSurface();
+        QPlatformSurfaceEvent e(QPlatformSurfaceEvent::SurfaceCreated);
+        QGuiApplication::sendEvent(window(), &e);
+    }
 
     if (shouldCreateSubSurface()) {
         Q_ASSERT(!mSubSurfaceWindow);
@@ -246,8 +249,12 @@ bool QWaylandWindow::shouldCreateSubSurface() const
     return QPlatformWindow::parent() != Q_NULLPTR;
 }
 
-void QWaylandWindow::reset()
+void QWaylandWindow::reset(bool sendDestroyEvent)
 {
+    if (isInitialized() && sendDestroyEvent) {
+        QPlatformSurfaceEvent e(QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed);
+        QGuiApplication::sendEvent(window(), &e);
+    }
     delete mShellSurface;
     mShellSurface = 0;
     delete mSubSurfaceWindow;
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index 5457d655..2ec5c23f 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -258,7 +258,7 @@ private:
     void initializeWlSurface();
     bool shouldCreateShellSurface() const;
     bool shouldCreateSubSurface() const;
-    void reset();
+    void reset(bool sendDestroyEvent = true);
     void sendExposeEvent(const QRect &rect);
     static void closePopups(QWaylandWindow *parent);
     QWaylandScreen *calculateScreenFromSurfaceEvents() const;
-- 
2.15.0