Move the UNIX event dispatchers into QtGui

Task-number: QTBUG-83255
Change-Id: I7d32eb1ec01784c9ed6bf5fc4913ffc5b3a34a49
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

8 files changed, 501 insertions, 0 deletions

diff --git a/src/gui/platform/platform.pri b/src/gui/platform/platform.pri
index 15b5c1a69b..14a10d10b1 100644
--- a/src/gui/platform/platform.pri
+++ b/src/gui/platform/platform.pri
@@ -1,3 +1,4 @@
 wasm:include(wasm/wasm.pri)
 darwin:include(darwin/darwin.pri)
 win32:include(windows/windows.pri)
+unix:include(unix/unix.pri)
diff --git a/src/gui/platform/unix/qeventdispatcher_glib.cpp b/src/gui/platform/unix/qeventdispatcher_glib.cpp
new file mode 100644
index 0000000000..0ccbf01e80
--- /dev/null
+++ b/src/gui/platform/unix/qeventdispatcher_glib.cpp
@@ -0,0 +1,123 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qeventdispatcher_glib_p.h"
+
+#include "qguiapplication.h"
+
+#include "qplatformdefs.h"
+
+#include <glib.h>
+#include "private/qguiapplication_p.h"
+
+QT_BEGIN_NAMESPACE
+
+struct GUserEventSource
+{
+    GSource source;
+    QPAEventDispatcherGlib *q;
+    QPAEventDispatcherGlibPrivate *d;
+};
+
+static gboolean userEventSourcePrepare(GSource *source, gint *timeout)
+{
+    Q_UNUSED(timeout)
+    GUserEventSource *userEventSource = reinterpret_cast<GUserEventSource *>(source);
+    return userEventSource->d->wakeUpCalled;
+}
+
+static gboolean userEventSourceCheck(GSource *source)
+{
+    return userEventSourcePrepare(source, 0);
+}
+
+static gboolean userEventSourceDispatch(GSource *source, GSourceFunc, gpointer)
+{
+    GUserEventSource *userEventSource = reinterpret_cast<GUserEventSource *>(source);
+    QPAEventDispatcherGlib *dispatcher = userEventSource->q;
+    QWindowSystemInterface::sendWindowSystemEvents(dispatcher->m_flags);
+    return true;
+}
+
+static GSourceFuncs userEventSourceFuncs = {
+    userEventSourcePrepare,
+    userEventSourceCheck,
+    userEventSourceDispatch,
+    NULL,
+    NULL,
+    NULL
+};
+
+QPAEventDispatcherGlibPrivate::QPAEventDispatcherGlibPrivate(GMainContext *context)
+    : QEventDispatcherGlibPrivate(context)
+{
+    Q_Q(QPAEventDispatcherGlib);
+    userEventSource = reinterpret_cast<GUserEventSource *>(g_source_new(&userEventSourceFuncs,
+                                                                       sizeof(GUserEventSource)));
+    userEventSource->q = q;
+    userEventSource->d = this;
+    g_source_set_can_recurse(&userEventSource->source, true);
+    g_source_attach(&userEventSource->source, mainContext);
+}
+
+
+QPAEventDispatcherGlib::QPAEventDispatcherGlib(QObject *parent)
+    : QEventDispatcherGlib(*new QPAEventDispatcherGlibPrivate, parent)
+    , m_flags(QEventLoop::AllEvents)
+{
+    Q_D(QPAEventDispatcherGlib);
+    d->userEventSource->q = this;
+}
+
+QPAEventDispatcherGlib::~QPAEventDispatcherGlib()
+{
+    Q_D(QPAEventDispatcherGlib);
+
+    g_source_destroy(&d->userEventSource->source);
+    g_source_unref(&d->userEventSource->source);
+    d->userEventSource = 0;
+}
+
+bool QPAEventDispatcherGlib::processEvents(QEventLoop::ProcessEventsFlags flags)
+{
+    m_flags = flags;
+    return QEventDispatcherGlib::processEvents(m_flags);
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/platform/unix/qeventdispatcher_glib_p.h b/src/gui/platform/unix/qeventdispatcher_glib_p.h
new file mode 100644
index 0000000000..91be66a81f
--- /dev/null
+++ b/src/gui/platform/unix/qeventdispatcher_glib_p.h
@@ -0,0 +1,88 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEVENTDISPATCHER_GLIB_QPA_P_H
+#define QEVENTDISPATCHER_GLIB_QPA_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/private/qeventdispatcher_glib_p.h>
+#include <QtGui/qtguiglobal.h>
+
+typedef struct _GMainContext GMainContext;
+
+QT_BEGIN_NAMESPACE
+class QPAEventDispatcherGlibPrivate;
+
+class Q_GUI_EXPORT QPAEventDispatcherGlib : public QEventDispatcherGlib
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QPAEventDispatcherGlib)
+
+public:
+    explicit QPAEventDispatcherGlib(QObject *parent = nullptr);
+    ~QPAEventDispatcherGlib();
+
+    bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
+    QEventLoop::ProcessEventsFlags m_flags;
+};
+
+struct GUserEventSource;
+
+class QPAEventDispatcherGlibPrivate : public QEventDispatcherGlibPrivate
+{
+    Q_DECLARE_PUBLIC(QPAEventDispatcherGlib)
+public:
+    QPAEventDispatcherGlibPrivate(GMainContext *context = nullptr);
+    GUserEventSource *userEventSource;
+};
+
+
+QT_END_NAMESPACE
+
+#endif // QEVENTDISPATCHER_GLIB_QPA_P_H
diff --git a/src/gui/platform/unix/qgenericunixeventdispatcher.cpp b/src/gui/platform/unix/qgenericunixeventdispatcher.cpp
new file mode 100644
index 0000000000..2e1d81a181
--- /dev/null
+++ b/src/gui/platform/unix/qgenericunixeventdispatcher.cpp
@@ -0,0 +1,56 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgenericunixeventdispatcher_p.h"
+#include "qunixeventdispatcher_qpa_p.h"
+#include "qeventdispatcher_glib_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QAbstractEventDispatcher *QtGenericUnixDispatcher::createUnixEventDispatcher()
+{
+#if !defined(QT_NO_GLIB) && !defined(Q_OS_WIN)
+    if (qEnvironmentVariableIsEmpty("QT_NO_GLIB") && QEventDispatcherGlib::versionSupported())
+        return new QPAEventDispatcherGlib();
+    else
+#endif
+        return new QUnixEventDispatcherQPA();
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/platform/unix/qgenericunixeventdispatcher_p.h b/src/gui/platform/unix/qgenericunixeventdispatcher_p.h
new file mode 100644
index 0000000000..c567463772
--- /dev/null
+++ b/src/gui/platform/unix/qgenericunixeventdispatcher_p.h
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists for the convenience
+// of other Qt classes. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#ifndef QGENERICUNIXEVENTDISPATCHER_P_H
+#define QGENERICUNIXEVENTDISPATCHER_P_H
+
+#include <QtGui/qtguiglobal.h>
+
+QT_BEGIN_NAMESPACE
+
+class QAbstractEventDispatcher;
+namespace QtGenericUnixDispatcher {
+Q_GUI_EXPORT QAbstractEventDispatcher *createUnixEventDispatcher();
+}
+using QtGenericUnixDispatcher::createUnixEventDispatcher;
+
+QT_END_NAMESPACE
+
+#endif // QGENERICUNIXEVENTDISPATCHER_P_H
diff --git a/src/gui/platform/unix/qunixeventdispatcher.cpp b/src/gui/platform/unix/qunixeventdispatcher.cpp
new file mode 100644
index 0000000000..44258538ec
--- /dev/null
+++ b/src/gui/platform/unix/qunixeventdispatcher.cpp
@@ -0,0 +1,79 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qplatformdefs.h"
+#include "qcoreapplication.h"
+#include "qunixeventdispatcher_qpa_p.h"
+#include "private/qguiapplication_p.h"
+
+#include <qpa/qwindowsysteminterface.h>
+
+#include <QtCore/QDebug>
+
+QT_BEGIN_NAMESPACE
+
+QT_USE_NAMESPACE
+
+
+QUnixEventDispatcherQPA::QUnixEventDispatcherQPA(QObject *parent)
+    : QEventDispatcherUNIX(parent)
+{ }
+
+QUnixEventDispatcherQPA::~QUnixEventDispatcherQPA()
+{ }
+
+bool QUnixEventDispatcherQPA::processEvents(QEventLoop::ProcessEventsFlags flags)
+{
+    const bool didSendEvents = QEventDispatcherUNIX::processEvents(flags);
+    return QWindowSystemInterface::sendWindowSystemEvents(flags) || didSendEvents;
+}
+
+bool QUnixEventDispatcherQPA::hasPendingEvents()
+{
+    extern uint qGlobalPostedEventsCount(); // from qapplication.cpp
+    return qGlobalPostedEventsCount() || QWindowSystemInterface::windowSystemEventsQueued();
+}
+
+void QUnixEventDispatcherQPA::flush()
+{
+    if(qApp)
+        qApp->sendPostedEvents();
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/platform/unix/qunixeventdispatcher_qpa_p.h b/src/gui/platform/unix/qunixeventdispatcher_qpa_p.h
new file mode 100644
index 0000000000..9cd16be22a
--- /dev/null
+++ b/src/gui/platform/unix/qunixeventdispatcher_qpa_p.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QUNIXEVENTDISPATCHER_QPA_H
+#define QUNIXEVENTDISPATCHER_QPA_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtGui/qtguiglobal.h>
+#include <QtCore/private/qeventdispatcher_unix_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QUnixEventDispatcherQPA : public QEventDispatcherUNIX
+{
+    Q_OBJECT
+
+public:
+    explicit QUnixEventDispatcherQPA(QObject *parent = nullptr);
+    ~QUnixEventDispatcherQPA();
+
+    bool processEvents(QEventLoop::ProcessEventsFlags flags) override;
+    bool hasPendingEvents() override;
+
+    void flush() override;
+};
+
+QT_END_NAMESPACE
+
+#endif // QUNIXEVENTDISPATCHER_QPA_H
diff --git a/src/gui/platform/unix/unix.pri b/src/gui/platform/unix/unix.pri
new file mode 100644
index 0000000000..b0274989e0
--- /dev/null
+++ b/src/gui/platform/unix/unix.pri
@@ -0,0 +1,13 @@
+SOURCES += \
+    platform/unix/qunixeventdispatcher.cpp \
+    platform/unix/qgenericunixeventdispatcher.cpp
+
+HEADERS += \
+    platform/unix/qunixeventdispatcher_qpa_p.h \
+    platform/unix/qgenericunixeventdispatcher_p.h
+
+qtConfig(glib) {
+    SOURCES += platform/unix/qeventdispatcher_glib.cpp
+    HEADERS += platform/unix/qeventdispatcher_glib_p.h
+    QMAKE_USE_PRIVATE += glib
+}