qt5-qtwayland/0015-Client-Delay-deletion-of-QDrag-object-until-after-we.patch

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2023-06-13 07:07:13 +00:00
From b29079669153d7b1894fc13b2cd8c6de1ad5471a Mon Sep 17 00:00:00 2001
2022-03-08 11:00:00 +00:00
From: Arjen Hiemstra <ahiemstra@heimr.nl>
Date: Thu, 18 Nov 2021 13:05:30 +0100
2023-06-13 07:07:13 +00:00
Subject: [PATCH 15/51] Client: Delay deletion of QDrag object until after
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we're done with it
In certain cases, most notably when performing drag and drop operations
with touch, the QDrag object gets deleted before data_source_send is
executed. This then tries to access a deleted data_source, crashing the
client.
To avoid this, we indicate we want the QDrag object to stay around and
then delete it in QWaylandDrag::finishDrag, which with data_device v3 is
guaranteed to be called after everyone is done with the data source.
Change-Id: I6a2f5a219f58d1b721a9fec33c57d26d2c522ec9
Reviewed-by: David Edmundson <davidedmundson@kde.org>
(cherry picked from commit 39e3290efa2dd40722fa3322284cae3b01ccedf4)
---
src/client/qwaylanddnd.cpp | 11 +++++++++++
src/client/qwaylanddnd_p.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/src/client/qwaylanddnd.cpp b/src/client/qwaylanddnd.cpp
index 97ee5b2e..7c53f5fa 100644
--- a/src/client/qwaylanddnd.cpp
+++ b/src/client/qwaylanddnd.cpp
@@ -80,6 +80,9 @@ void QWaylandDrag::cancel()
QBasicDrag::cancel();
m_display->currentInputDevice()->dataDevice()->cancelDrag();
+
+ if (drag())
+ drag()->deleteLater();
}
void QWaylandDrag::move(const QPoint &globalPos, Qt::MouseButtons b, Qt::KeyboardModifiers mods)
@@ -130,6 +133,14 @@ void QWaylandDrag::finishDrag()
{
QKeyEvent event(QEvent::KeyPress, Qt::Key_Escape, Qt::NoModifier);
eventFilter(shapedPixmapWindow(), &event);
+
+ if (drag())
+ drag()->deleteLater();
+}
+
+bool QWaylandDrag::ownsDragObject() const
+{
+ return true;
}
}
diff --git a/src/client/qwaylanddnd_p.h b/src/client/qwaylanddnd_p.h
index 747f0190..46f629ac 100644
--- a/src/client/qwaylanddnd_p.h
+++ b/src/client/qwaylanddnd_p.h
@@ -83,6 +83,7 @@ protected:
void drop(const QPoint &globalPos, Qt::MouseButtons b, Qt::KeyboardModifiers mods) override;
void endDrag() override;
+ bool ownsDragObject() const override;
private:
QWaylandDisplay *m_display = nullptr;
--
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2.40.1
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