Backport upstream fix for clipboard issue

kwin-do-not-refresh-x11-clipboard-while-fetching.patch

@@ -0,0 +1,75 @@
+From d335070b80c2f3bc5674355e3edba61bc010bc36 Mon Sep 17 00:00:00 2001
+From: Aleix Pol <aleixpol@kde.org>
+Date: Tue, 20 Oct 2020 02:29:01 +0200
+Subject: [PATCH] xwl: Do not refresh the x11 Clipboard while fetching
+
+At the moment there was a race condition when putting something into the
+keyboard from XWayland apps. The clipboard manager would announce a new
+thing before we'd submitted it all resulting in a broken state.
+
+This change detects when it's fetching and will only refresh the source
+after everything has been sent.
+
+BUG: 424754
+CCBUG: 412350
+---
+ xwl/clipboard.cpp | 10 ++++++++++
+ xwl/clipboard.h   |  1 +
+ 2 files changed, 11 insertions(+)
+
+diff --git a/xwl/clipboard.cpp b/xwl/clipboard.cpp
+index b2f3435a5..a64fda0ae 100644
+--- a/xwl/clipboard.cpp
++++ b/xwl/clipboard.cpp
+@@ -66,6 +66,10 @@ Clipboard::Clipboard(xcb_atom_t atom, QObject *parent)
+
+ void Clipboard::wlSelectionChanged(KWaylandServer::AbstractDataSource *dsi)
+ {
++    if (m_waitingForTargets) {
++        return;
++    }
++
+     if (!ownsSelection(dsi)) {
+         // Wayland native client provides new selection
+         if (!m_checkConnection) {
+@@ -85,6 +89,10 @@ bool Clipboard::ownsSelection(KWaylandServer::AbstractDataSource *dsi) const
+
+ void Clipboard::checkWlSource()
+ {
++    if (m_waitingForTargets) {
++        return;
++    }
++
+     auto dsi = waylandServer()->seat()->selection();
+     auto removeSource = [this] {
+         if (wlSource()) {
+@@ -142,6 +150,7 @@ void Clipboard::doHandleXfixesNotify(xcb_xfixes_selection_notify_event_t *event)
+
+     if (X11Source *source = x11Source()) {
+         source->getTargets();
++        m_waitingForTargets = true;
+     } else {
+         qCWarning(KWIN_XWL) << "Could not create a source from" << event << Qt::hex << (event ? event->owner : -1);
+     }
+@@ -149,6 +158,7 @@ void Clipboard::doHandleXfixesNotify(xcb_xfixes_selection_notify_event_t *event)
+
+ void Clipboard::x11OffersChanged(const QStringList &added, const QStringList &removed)
+ {
++    m_waitingForTargets = false;
+     X11Source *source = x11Source();
+     if (!source) {
+         qCWarning(KWIN_XWL) << "offers changed when not having an X11Source!?";
+diff --git a/xwl/clipboard.h b/xwl/clipboard.h
+index c2296845a..f534d1f3e 100644
+--- a/xwl/clipboard.h
++++ b/xwl/clipboard.h
+@@ -53,6 +53,7 @@ private:
+     QMetaObject::Connection m_checkConnection;
+
+     Q_DISABLE_COPY(Clipboard)
++    bool m_waitingForTargets = false;
+ };
+
+ } // namespace Xwl
+--
+GitLab

kwin.spec

@@ -17,7 +17,7 @@
 
 Name:    kwin
 Version: 5.20.2
-Release: 2%{?dist}
+Release: 3%{?dist}
 Summary: KDE Window manager
 
 # all sources are effectively GPLv2+, except for:
@@ -38,6 +38,7 @@ URL:     https://userbase.kde.org/KWin
 Source0: http://download.kde.org/%{stable}/plasma/%{version}/%{name}-%{version}.tar.xz
 
 ## upstream patches
+Patch0:  kwin-do-not-refresh-x11-clipboard-while-fetching.patch
 
 # Base
 BuildRequires:  extra-cmake-modules
@@ -355,6 +356,9 @@ make test ARGS="--output-on-failure --timeout 10" -C %{_target_platform} ||:
 
 
 %changelog
+* Thu Nov  5 07:55:10 CET 2020 Jan Grulich <jgrulich@redhat.com> - 5.20.2-3
+- Backport upstream fix for clipboard issue
+
 * Sat Oct 31 10:01:51 EDT 2020 Neal Gompa <ngompa13@gmail.com> - 5.20.2-2
 - Obsolete kwin-wayland-nvidia package by kwin-wayland since kwin now
   automatically supports NVIDIA graphics correctly on Wayland