Port of Qt 4's Windows session management

This patch aims to implement the session management for Windows.
Based on the Qt 4 QApplication windows specific code

Task-number: QTBUG-28228
Task-number: QTBUG-33032
Change-Id: I7059298ad9661aebd51e77a03f55a7a04f461479
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

9 files changed, 327 insertions, 3 deletions

diff --git a/src/corelib/kernel/qcoreapplication_win.cpp b/src/corelib/kernel/qcoreapplication_win.cpp
index dd1b84aa58..418074dc7a 100644
--- a/src/corelib/kernel/qcoreapplication_win.cpp
+++ b/src/corelib/kernel/qcoreapplication_win.cpp
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -990,6 +991,24 @@ QString decodeMSG(const MSG& msg)
             }
             break;
 #endif
+#ifdef WM_QUERYENDSESSION
+#ifndef ENDSESSION_CLOSEAPP
+#define ENDSESSION_CLOSEAPP 0x00000001
+#endif
+#ifndef ENDSESSION_CRITICAL
+#define ENDSESSION_CRITICAL 0x40000000
+#endif
+        case WM_QUERYENDSESSION:
+            {
+                QString logoffOption = valueCheck(wParam,
+                                                  FLAG_STRING(ENDSESSION_CLOSEAPP, "Close application"),
+                                                  FLAG_STRING(ENDSESSION_CRITICAL, "Force application end"),
+                                                  FLAG_STRING(ENDSESSION_LOGOFF,   "User logoff"),
+                                                  FLAG_STRING());
+                parameters.sprintf("End session: %s", logoffOption.toLatin1().data());
+            }
+           break;
+#endif
         default:
             parameters.sprintf("wParam(0x%p) lParam(0x%p)", (void *)wParam, (void *)lParam);
             break;
diff --git a/src/plugins/platforms/windows/qtwindowsglobal.h b/src/plugins/platforms/windows/qtwindowsglobal.h
index e9eb50799e..ee5b6189b2 100644
--- a/src/plugins/platforms/windows/qtwindowsglobal.h
+++ b/src/plugins/platforms/windows/qtwindowsglobal.h
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -98,6 +99,8 @@ enum WindowsEventType // Simplify event types
     ActivateApplicationEvent = ApplicationEventFlag + 1,
     DeactivateApplicationEvent = ApplicationEventFlag + 2,
     AccessibleObjectFromWindowRequest = ApplicationEventFlag + 3,
+    QueryEndSessionApplicationEvent = ApplicationEventFlag + 4,
+    EndSessionApplicationEvent = ApplicationEventFlag + 5,
     InputMethodStartCompositionEvent = InputMethodEventFlag + 1,
     InputMethodCompositionEvent = InputMethodEventFlag + 2,
     InputMethodEndCompositionEvent = InputMethodEventFlag + 3,
@@ -214,6 +217,12 @@ inline QtWindows::WindowsEventType windowsEventType(UINT message, WPARAM wParamI
             return QtWindows::WhatsThisEvent;
 #endif
         break;
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+    case WM_QUERYENDSESSION:
+        return QtWindows::QueryEndSessionApplicationEvent;
+    case WM_ENDSESSION:
+        return QtWindows::EndSessionApplicationEvent;
+#endif
     default:
         break;
     }
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index 8dab1e2b1c..783d50a26a 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -49,7 +50,12 @@
 #include "qwindowsinputcontext.h"
 #include "qwindowstabletsupport.h"
 #ifndef QT_NO_ACCESSIBILITY
-#include "accessible/qwindowsaccessibility.h"
+# include "accessible/qwindowsaccessibility.h"
+#endif
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+# include <private/qguiapplication_p.h>
+# include <private/qsessionmanager_p.h>
+# include "qwindowssessionmanager.h"
 #endif
 #include "qwindowsscreen.h"
 #include "qwindowstheme.h"
@@ -151,6 +157,14 @@ static inline bool useRTL_Extensions(QSysInfo::WinVersion ver)
 #endif
 }
 
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+static inline QWindowsSessionManager *platformSessionManager() {
+    QGuiApplicationPrivate *guiPrivate = static_cast<QGuiApplicationPrivate*>(QObjectPrivate::get(qApp));
+    QSessionManagerPrivate *managerPrivate = static_cast<QSessionManagerPrivate*>(QObjectPrivate::get(guiPrivate->session_manager));
+    return static_cast<QWindowsSessionManager *>(managerPrivate->platformSessionManager);
+}
+#endif
+
 /*!
     \class QWindowsUser32DLL
     \brief Struct that contains dynamically resolved symbols of User32.dll.
@@ -828,7 +842,11 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
     case QtWindows::KeyEvent:
     case QtWindows::InputMethodKeyEvent:
     case QtWindows::InputMethodKeyDownEvent:
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+        return platformSessionManager()->isInterractionBlocked() ? true : d->m_keyMapper.translateKeyEvent(platformWindow->window(), hwnd, msg, result);
+#else
         return d->m_keyMapper.translateKeyEvent(platformWindow->window(), hwnd, msg, result);
+#endif
     case QtWindows::MoveEvent:
         platformWindow->handleMoved();
         return true;
@@ -848,7 +866,11 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
         return platformWindow->handleWmPaint(hwnd, message, wParam, lParam);
     case QtWindows::NonClientMouseEvent:
         if (platformWindow->frameStrutEventsEnabled())
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+            return platformSessionManager()->isInterractionBlocked() ? true : d->m_mouseHandler.translateMouseEvent(platformWindow->window(), hwnd, et, msg, result);
+#else
             return d->m_mouseHandler.translateMouseEvent(platformWindow->window(), hwnd, et, msg, result);
+#endif
         break;
 /* the mouse tracking on windows already handles the reset of the cursor
  * and does not like somebody else handling it.
@@ -864,9 +886,17 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
     case QtWindows::MouseWheelEvent:
     case QtWindows::MouseEvent:
     case QtWindows::LeaveEvent:
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+        return platformSessionManager()->isInterractionBlocked() ? true : d->m_mouseHandler.translateMouseEvent(platformWindow->window(), hwnd, et, msg, result);
+#else
         return d->m_mouseHandler.translateMouseEvent(platformWindow->window(), hwnd, et, msg, result);
+#endif
     case QtWindows::TouchEvent:
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+        return platformSessionManager()->isInterractionBlocked() ? true : d->m_mouseHandler.translateTouchEvent(platformWindow->window(), hwnd, et, msg, result);
+#else
         return d->m_mouseHandler.translateTouchEvent(platformWindow->window(), hwnd, et, msg, result);
+#endif
     case QtWindows::FocusInEvent: // see QWindowsWindow::requestActivateWindow().
     case QtWindows::FocusOutEvent:
         handleFocusEvent(et, platformWindow);
@@ -910,6 +940,44 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
         return true;
 #endif
     }   break;
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+    case QtWindows::QueryEndSessionApplicationEvent: {
+        QWindowsSessionManager *sessionManager = platformSessionManager();
+        if (sessionManager->isActive()) // bogus message from windows
+            return true;
+
+        sessionManager->setActive(true);
+        sessionManager->blocksInteraction();
+        sessionManager->clearCancellation();
+
+        QGuiApplicationPrivate *qGuiAppPriv = static_cast<QGuiApplicationPrivate*>(QObjectPrivate::get(qApp));
+        qGuiAppPriv->commitData();
+
+        if (lParam & ENDSESSION_LOGOFF)
+            _flushall();
+
+        return !sessionManager->wasCanceled();
+    }
+    case QtWindows::EndSessionApplicationEvent: {
+        QWindowsSessionManager *sessionManager = platformSessionManager();
+
+        sessionManager->setActive(false);
+        sessionManager->allowsInteraction();
+        bool endsession = (bool) wParam;
+
+        // we receive the message for each toplevel window included internal hidden ones,
+        // but the aboutToQuit signal should be emitted only once.
+        QGuiApplicationPrivate *qGuiAppPriv = static_cast<QGuiApplicationPrivate*>(QObjectPrivate::get(qApp));
+        if (endsession && !qGuiAppPriv->aboutToQuitEmitted) {
+            qGuiAppPriv->aboutToQuitEmitted = true;
+            int index = QGuiApplication::staticMetaObject.indexOfSignal("aboutToQuit()");
+            qApp->qt_metacall(QMetaObject::InvokeMetaMethod, index,0);
+            // since the process will be killed immediately quit() has no real effect
+            QGuiApplication::quit();
+        }
+        return true;
+    }
+#endif // !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
     default:
         break;
     }
diff --git a/src/plugins/platforms/windows/qwindowsguieventdispatcher.cpp b/src/plugins/platforms/windows/qwindowsguieventdispatcher.cpp
index 6be71999f6..e7cd0bc6c8 100644
--- a/src/plugins/platforms/windows/qwindowsguieventdispatcher.cpp
+++ b/src/plugins/platforms/windows/qwindowsguieventdispatcher.cpp
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -176,6 +177,10 @@ messageDebugEntries[] = {
     {WM_IME_ENDCOMPOSITION, "WM_IME_ENDCOMPOSITION", true},
     {WM_IME_NOTIFY, "WM_IME_NOTIFY", true},
     {WM_IME_REQUEST, "WM_IME_REQUEST", true},
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+    {WM_QUERYENDSESSION, "WM_QUERYENDSESSION", true},
+    {WM_ENDSESSION, "WM_ENDSESSION", true},
+#endif
     {WM_DISPLAYCHANGE, "WM_DISPLAYCHANGE", true},
     {WM_THEMECHANGED, "WM_THEMECHANGED", true}
 };
diff --git a/src/plugins/platforms/windows/qwindowsintegration.cpp b/src/plugins/platforms/windows/qwindowsintegration.cpp
index 5f1f9cf149..d7ac4cfc1e 100644
--- a/src/plugins/platforms/windows/qwindowsintegration.cpp
+++ b/src/plugins/platforms/windows/qwindowsintegration.cpp
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -65,12 +66,15 @@
 #endif
 #include "qwindowsinputcontext.h"
 #include "qwindowskeymapper.h"
-#  ifndef QT_NO_ACCESSIBILITY
-#include "accessible/qwindowsaccessibility.h"
+#ifndef QT_NO_ACCESSIBILITY
+#  include "accessible/qwindowsaccessibility.h"
 #endif
 
 #include <qpa/qplatformnativeinterface.h>
 #include <qpa/qwindowsysteminterface.h>
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+#  include "qwindowssessionmanager.h"
+#endif
 #include <QtGui/QBackingStore>
 #include <QtGui/private/qpixmap_raster_p.h>
 #include <QtGui/private/qguiapplication_p.h>
@@ -624,6 +628,13 @@ unsigned QWindowsIntegration::options() const
     return d->m_options;
 }
 
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+QPlatformSessionManager *QWindowsIntegration::createPlatformSessionManager(const QString &id, const QString &key) const
+{
+    return new QWindowsSessionManager(id, key);
+}
+#endif
+
 QAbstractEventDispatcher * QWindowsIntegration::guiThreadEventDispatcher() const
 {
     return d->m_eventDispatcher;
diff --git a/src/plugins/platforms/windows/qwindowsintegration.h b/src/plugins/platforms/windows/qwindowsintegration.h
index b3854d673a..6643b1642e 100644
--- a/src/plugins/platforms/windows/qwindowsintegration.h
+++ b/src/plugins/platforms/windows/qwindowsintegration.h
@@ -1,5 +1,6 @@
 /****************************************************************************
 **
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
@@ -100,6 +101,10 @@ public:
 
     unsigned options() const;
 
+#if !defined(Q_OS_WINCE) && !defined(QT_NO_SESSIONMANAGER)
+    virtual QPlatformSessionManager *createPlatformSessionManager(const QString &id, const QString &key) const;
+#endif
+
 private:
     QScopedPointer<QWindowsIntegrationPrivate> d;
 };
diff --git a/src/plugins/platforms/windows/qwindowssessionmanager.cpp b/src/plugins/platforms/windows/qwindowssessionmanager.cpp
new file mode 100644
index 0000000000..efdbb6b279
--- /dev/null
+++ b/src/plugins/platforms/windows/qwindowssessionmanager.cpp
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwindowssessionmanager.h"
+
+QT_BEGIN_NAMESPACE
+
+QWindowsSessionManager::QWindowsSessionManager(const QString &id, const QString &key)
+    : QPlatformSessionManager(id, key)
+    , m_isActive(false)
+    , m_blockUserInput(false)
+    , m_canceled(false)
+{
+}
+
+QWindowsSessionManager::~QWindowsSessionManager()
+{
+}
+
+bool QWindowsSessionManager::allowsInteraction()
+{
+    m_blockUserInput = false;
+    return true;
+}
+
+bool QWindowsSessionManager::allowsErrorInteraction()
+{
+    m_blockUserInput = false;
+    return true;
+}
+
+void QWindowsSessionManager::blocksInteraction()
+{
+    m_blockUserInput = true;
+}
+
+bool QWindowsSessionManager::isInterractionBlocked() const
+{
+    return m_blockUserInput;
+}
+
+void QWindowsSessionManager::release()
+{
+    if (m_isActive)
+        m_blockUserInput = true;
+}
+
+void QWindowsSessionManager::cancel()
+{
+    m_canceled = true;
+}
+
+void QWindowsSessionManager::clearCancellation()
+{
+    m_canceled = false;
+}
+
+bool QWindowsSessionManager::wasCanceled() const
+{
+    return m_canceled;
+}
+
+void QWindowsSessionManager::setActive(bool active)
+{
+    m_isActive = active;
+}
+
+bool QWindowsSessionManager::isActive() const
+{
+    return m_isActive;
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/platforms/windows/qwindowssessionmanager.h b/src/plugins/platforms/windows/qwindowssessionmanager.h
new file mode 100644
index 0000000000..3e21cbabec
--- /dev/null
+++ b/src/plugins/platforms/windows/qwindowssessionmanager.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch>
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWINDOWSSESSIONMANAGER_H
+#define QWINDOWSSESSIONMANAGER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is part of the QPA API and is not meant to be used
+// in applications. Usage of this API may make your code
+// source and binary incompatible with future versions of Qt.
+//
+
+#include <qpa/qplatformsessionmanager.h>
+
+QT_BEGIN_NAMESPACE
+
+class QWindowsSessionManager : public QPlatformSessionManager
+{
+public:
+    explicit QWindowsSessionManager(const QString &id, const QString &key);
+    virtual ~QWindowsSessionManager();
+
+    bool allowsInteraction() Q_DECL_OVERRIDE;
+    bool allowsErrorInteraction() Q_DECL_OVERRIDE;
+
+    void blocksInteraction();
+    bool isInterractionBlocked() const;
+
+    void release() Q_DECL_OVERRIDE;
+
+    void cancel() Q_DECL_OVERRIDE;
+    void clearCancellation();
+    bool wasCanceled() const;
+
+    void setActive(bool active);
+    bool isActive() const;
+
+private:
+    bool m_isActive;
+    bool m_blockUserInput;
+    bool m_canceled;
+
+    Q_DISABLE_COPY(QWindowsSessionManager)
+};
+
+QT_END_NAMESPACE
+
+#endif // QWINDOWSSESSIONMANAGER_H
diff --git a/src/plugins/platforms/windows/windows.pro b/src/plugins/platforms/windows/windows.pro
index d4e6e558ed..0249e156d9 100644
--- a/src/plugins/platforms/windows/windows.pro
+++ b/src/plugins/platforms/windows/windows.pro
@@ -108,6 +108,11 @@ contains(QT_CONFIG, opengles2) {
     SOURCES += qwindowstabletsupport.cpp
 }
 
+!wince*:!contains( DEFINES, QT_NO_SESSIONMANAGER ) {
+    SOURCES += qwindowssessionmanager.cpp
+    HEADERS += qwindowssessionmanager.h
+}
+
 contains(QT_CONFIG, freetype) {
     DEFINES *= QT_NO_FONTCONFIG
     QT_FREETYPE_DIR = $$QT_SOURCE_TREE/src/3rdparty/freetype