Remove dependencies of QShortcutMap onto widgets

This is the first towards bringing shortcut support
back into QtGui.

Change-Id: Ic2cf376d08c326402fb90a0cf170a987b07ac304
Reviewed-on: http://codereview.qt-project.org/6577
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/widgets/graphicsview/qgraphicswidget.cpp

@@ -1898,7 +1898,7 @@ int QGraphicsWidget::grabShortcut(const QKeySequence &sequence, Qt::ShortcutCont
     if (sequence.isEmpty())
         return 0;
     // ### setAttribute(Qt::WA_GrabbedShortcut);
-    return qApp->d_func()->shortcutMap.addShortcut(this, sequence, context);
+    return qApp->d_func()->shortcutMap.addShortcut(this, sequence, context, qWidgetShortcutContextMatcher);
 }
 
 /*!

src/widgets/kernel/qaction.cpp

@@ -139,7 +139,7 @@ void QActionPrivate::redoGrab(QShortcutMap &map)
         map.removeShortcut(shortcutId, q);
     if (shortcut.isEmpty())
         return;
-    shortcutId = map.addShortcut(q, shortcut, shortcutContext);
+    shortcutId = map.addShortcut(q, shortcut, shortcutContext, qWidgetShortcutContextMatcher);
     if (!enabled)
         map.setShortcutEnabled(false, shortcutId, q);
     if (!autorepeat)
@@ -159,7 +159,7 @@ void QActionPrivate::redoGrabAlternate(QShortcutMap &map)
     for(int i = 0; i < alternateShortcuts.count(); ++i) {
         const QKeySequence& alternate = alternateShortcuts.at(i);
         if (!alternate.isEmpty())
-            alternateShortcutIds.append(map.addShortcut(q, alternate, shortcutContext));
+            alternateShortcutIds.append(map.addShortcut(q, alternate, shortcutContext, qWidgetShortcutContextMatcher));
         else
             alternateShortcutIds.append(0);
     }

src/widgets/kernel/qaction.h

@@ -214,7 +214,6 @@ private:
     friend class QMenu;
     friend class QMenuPrivate;
     friend class QMenuBar;
-    friend class QShortcutMap;
     friend class QToolButton;
 #ifdef Q_OS_MAC
     friend void qt_mac_clear_status_text(QAction *action);

src/widgets/kernel/qwidget.cpp

@@ -10713,7 +10713,7 @@ int QWidget::grabShortcut(const QKeySequence &key, Qt::ShortcutContext context)
     if (key.isEmpty())
         return 0;
     setAttribute(Qt::WA_GrabbedShortcut);
-    return qApp->d_func()->shortcutMap.addShortcut(this, key, context);
+    return qApp->d_func()->shortcutMap.addShortcut(this, key, context, qWidgetShortcutContextMatcher);
 }
 
 /*!

src/widgets/kernel/qwidget.h

@@ -750,7 +750,6 @@ private:
     friend class QX11PaintEngine;
     friend class QWin32PaintEngine;
     friend class QShortcutPrivate;
-    friend class QShortcutMap;
     friend class QWindowSurface;
     friend class QGraphicsProxyWidget;
     friend class QGraphicsProxyWidgetPrivate;

src/widgets/to_be_moved/qshortcut.cpp

@@ -172,7 +172,7 @@ void QShortcutPrivate::redoGrab(QShortcutMap &map)
         map.removeShortcut(sc_id, q);
     if (sc_sequence.isEmpty())
         return;
-    sc_id = map.addShortcut(q, sc_sequence, sc_context);
+    sc_id = map.addShortcut(q, sc_sequence, sc_context, qWidgetShortcutContextMatcher);
     if (!sc_enabled)
         map.setShortcutEnabled(false, sc_id, q);
     if (!sc_autorepeat)

src/widgets/to_be_moved/qshortcutmap.cpp

@@ -70,23 +70,22 @@ QT_BEGIN_NAMESPACE
         Keysequence for entry
         Pointer to parent owning the sequence
 */
+
 struct QShortcutEntry
 {
     QShortcutEntry()
-        : keyseq(0), context(Qt::WindowShortcut), enabled(false), autorepeat(1), id(0), owner(0)
+        : keyseq(0), context(Qt::WindowShortcut), enabled(false), autorepeat(1), id(0), owner(0), contextMatcher(0)
     {}
 
     QShortcutEntry(const QKeySequence &k)
-        : keyseq(k), context(Qt::WindowShortcut), enabled(false), autorepeat(1), id(0), owner(0)
+        : keyseq(k), context(Qt::WindowShortcut), enabled(false), autorepeat(1), id(0), owner(0), contextMatcher(0)
     {}
 
-    QShortcutEntry(QObject *o, const QKeySequence &k, Qt::ShortcutContext c, int i)
+    QShortcutEntry(QObject *o, const QKeySequence &k, Qt::ShortcutContext c, int i, bool a, QShortcutMap::ContextMatcher m)
-        : keyseq(k), context(c), enabled(true), autorepeat(1), id(i), owner(o)
+        : keyseq(k), context(c), enabled(true), autorepeat(a), id(i), owner(o), contextMatcher(m)
     {}
 
-    QShortcutEntry(QObject *o, const QKeySequence &k, Qt::ShortcutContext c, int i, bool a)
+    bool correctContext() const { return contextMatcher(owner, context); }
-        : keyseq(k), context(c), enabled(true), autorepeat(a), id(i), owner(o)
-    {}
 
     bool operator<(const QShortcutEntry &f) const
     { return keyseq < f.keyseq; }
@@ -97,6 +96,7 @@ struct QShortcutEntry
     bool autorepeat : 1;
     signed int id;
     QObject *owner;
+    QShortcutMap::ContextMatcher contextMatcher;
 };
 
 #if 0 //ndef QT_NO_DEBUG_STREAM
@@ -162,13 +162,13 @@ QShortcutMap::~QShortcutMap()
     Adds a shortcut to the global map.
     Returns the id of the newly added shortcut.
 */
-int QShortcutMap::addShortcut(QObject *owner, const QKeySequence &key, Qt::ShortcutContext context)
+int QShortcutMap::addShortcut(QObject *owner, const QKeySequence &key, Qt::ShortcutContext context, ContextMatcher matcher)
 {
     Q_ASSERT_X(owner, "QShortcutMap::addShortcut", "All shortcuts need an owner");
     Q_ASSERT_X(!key.isEmpty(), "QShortcutMap::addShortcut", "Cannot add keyless shortcuts to map");
     Q_D(QShortcutMap);
 
-    QShortcutEntry newEntry(owner, key, context, --(d->currentId), true);
+    QShortcutEntry newEntry(owner, key, context, --(d->currentId), true, matcher);
     QList<QShortcutEntry>::iterator it = qUpperBound(d->sequences.begin(), d->sequences.end(), newEntry);
     d->sequences.insert(it, newEntry); // Insert sorted
 #if defined(DEBUG_QSHORTCUTMAP)
@@ -425,7 +425,7 @@ bool QShortcutMap::hasShortcutForKeySequence(const QKeySequence &seq) const
     QList<QShortcutEntry>::ConstIterator it = qLowerBound(d->sequences.constBegin(), itEnd, entry);
 
     for (;it != itEnd; ++it) {
-        if (matches(entry.keyseq, (*it).keyseq) == QKeySequence::ExactMatch && correctContext(*it) && (*it).enabled) {
+        if (matches(entry.keyseq, (*it).keyseq) == QKeySequence::ExactMatch && (*it).correctContext() && (*it).enabled) {
             return true;
         }
     }
@@ -479,7 +479,7 @@ QKeySequence::SequenceMatch QShortcutMap::find(QKeyEvent *e)
                 break;
             tempRes = matches(entry.keyseq, (*it).keyseq);
             oneKSResult = qMax(oneKSResult, tempRes);
-            if (tempRes != QKeySequence::NoMatch && correctContext(*it)) {
+            if (tempRes != QKeySequence::NoMatch && (*it).correctContext()) {
                 if (tempRes == QKeySequence::ExactMatch) {
                     if ((*it).enabled)
                         d->identicals.append(&*it);
@@ -618,12 +618,23 @@ QKeySequence::SequenceMatch QShortcutMap::matches(const QKeySequence &seq1,
     return match;
 }
 
+
+static bool correctWidgetContext(Qt::ShortcutContext context, QWidget *w, QWidget *active_window);
+#ifndef QT_NO_GRAPHICSVIEW
+static bool correctGraphicsWidgetContext(Qt::ShortcutContext context, QGraphicsWidget *w, QWidget *active_window);
+#endif
+#ifndef QT_NO_ACTION
+static bool correctActionContext(Qt::ShortcutContext context, QAction *a, QWidget *active_window);
+#endif
+
+
 /*! \internal
     Returns true if the widget \a w is a logical sub window of the current
     top-level widget.
 */
-bool QShortcutMap::correctContext(const QShortcutEntry &item) const {
+bool qWidgetShortcutContextMatcher(QObject *object, Qt::ShortcutContext context)
-    Q_ASSERT_X(item.owner, "QShortcutMap", "Shortcut has no owner. Illegal map state!");
+{
+    Q_ASSERT_X(object, "QShortcutMap", "Shortcut has no owner. Illegal map state!");
 
     QWidget *active_window = QApplication::activeWindow();
 
@@ -635,23 +646,31 @@ bool QShortcutMap::correctContext(const QShortcutEntry &item) const {
 
     if (!active_window)
         return false;
+
 #ifndef QT_NO_ACTION
-    if (QAction *a = qobject_cast<QAction *>(item.owner))
+    if (QAction *a = qobject_cast<QAction *>(object))
-        return correctContext(item.context, a, active_window);
+        return correctActionContext(context, a, active_window);
 #endif
+
 #ifndef QT_NO_GRAPHICSVIEW
-    if (QGraphicsWidget *gw = qobject_cast<QGraphicsWidget *>(item.owner))
+    if (QGraphicsWidget *gw = qobject_cast<QGraphicsWidget *>(object))
-        return correctGraphicsWidgetContext(item.context, gw, active_window);
+        return correctGraphicsWidgetContext(context, gw, active_window);
 #endif
-    QWidget *w = qobject_cast<QWidget *>(item.owner);
+
+    QWidget *w = qobject_cast<QWidget *>(object);
     if (!w) {
-        QShortcut *s = qobject_cast<QShortcut *>(item.owner);
+        QShortcut *s = qobject_cast<QShortcut *>(object);
+        if (s)
             w = s->parentWidget();
     }
-    return correctWidgetContext(item.context, w, active_window);
+
+    if (!w)
+        return false;
+
+    return correctWidgetContext(context, w, active_window);
 }
 
-bool QShortcutMap::correctWidgetContext(Qt::ShortcutContext context, QWidget *w, QWidget *active_window) const
+static bool correctWidgetContext(Qt::ShortcutContext context, QWidget *w, QWidget *active_window)
 {
     bool visible = w->isVisible();    
 #ifdef Q_WS_MAC
@@ -678,7 +697,7 @@ bool QShortcutMap::correctWidgetContext(Qt::ShortcutContext context, QWidget *w,
     // Below is Qt::WindowShortcut context
     QWidget *tlw = w->window();
 #ifndef QT_NO_GRAPHICSVIEW
-    if (QWExtra *topData = tlw->d_func()->extra) {
+    if (QWExtra *topData = static_cast<QWidgetPrivate *>(QObjectPrivate::get(tlw))->extra) {
         if (topData->proxyWidget) {
             bool res = correctGraphicsWidgetContext(context, (QGraphicsWidget *)topData->proxyWidget, active_window);
             return res;
@@ -714,7 +733,7 @@ bool QShortcutMap::correctWidgetContext(Qt::ShortcutContext context, QWidget *w,
 }
 
 #ifndef QT_NO_GRAPHICSVIEW
-bool QShortcutMap::correctGraphicsWidgetContext(Qt::ShortcutContext context, QGraphicsWidget *w, QWidget *active_window) const
+static bool correctGraphicsWidgetContext(Qt::ShortcutContext context, QGraphicsWidget *w, QWidget *active_window)
 {
     bool visible = w->isVisible();
 #ifdef Q_WS_MAC
@@ -774,9 +793,9 @@ bool QShortcutMap::correctGraphicsWidgetContext(Qt::ShortcutContext context, QGr
 #endif
 
 #ifndef QT_NO_ACTION
-bool QShortcutMap::correctContext(Qt::ShortcutContext context, QAction *a, QWidget *active_window) const
+static bool correctActionContext(Qt::ShortcutContext context, QAction *a, QWidget *active_window)
 {
-    const QList<QWidget *> &widgets = a->d_func()->widgets;
+    const QList<QWidget *> &widgets = static_cast<QActionPrivate *>(QObjectPrivate::get(a))->widgets;
 #if defined(DEBUG_QSHORTCUTMAP)
     if (widgets.isEmpty())
         qDebug() << a << "not connected to any widgets; won't trigger";
@@ -786,7 +805,7 @@ bool QShortcutMap::correctContext(Qt::ShortcutContext context, QAction *a, QWidg
 #ifndef QT_NO_MENU
         if (QMenu *menu = qobject_cast<QMenu *>(w)) {
             QAction *a = menu->menuAction();
-            if (correctContext(context, a, active_window))
+            if (correctActionContext(context, a, active_window))
                 return true;
         } else
 #endif
@@ -795,7 +814,7 @@ bool QShortcutMap::correctContext(Qt::ShortcutContext context, QAction *a, QWidg
     }
 
 #ifndef QT_NO_GRAPHICSVIEW
-    const QList<QGraphicsWidget *> &graphicsWidgets = a->d_func()->graphicsWidgets;
+    const QList<QGraphicsWidget *> &graphicsWidgets = static_cast<QActionPrivate *>(QObjectPrivate::get(a))->graphicsWidgets;
 #if defined(DEBUG_QSHORTCUTMAP)
     if (graphicsWidgets.isEmpty())
         qDebug() << a << "not connected to any widgets; won't trigger";

src/widgets/to_be_moved/qshortcutmap_p.h

@@ -72,6 +72,8 @@ class QWidget;
 class QAction;
 class QObject;
 
+bool qWidgetShortcutContextMatcher(QObject *object, Qt::ShortcutContext context);
+
 class QShortcutMap
 {
     Q_DECLARE_PRIVATE(QShortcutMap)
@@ -79,7 +81,9 @@ public:
     QShortcutMap();
     ~QShortcutMap();
 
-    int addShortcut(QObject *owner, const QKeySequence &key, Qt::ShortcutContext context);
+    typedef bool (*ContextMatcher)(QObject *object, Qt::ShortcutContext context);
+
+    int addShortcut(QObject *owner, const QKeySequence &key, Qt::ShortcutContext context, ContextMatcher matcher);
     int removeShortcut(int id, QObject *owner, const QKeySequence &key = QKeySequence());
     int setShortcutEnabled(bool enable, int id, QObject *owner, const QKeySequence &key = QKeySequence());
     int setShortcutAutoRepeat(bool on, int id, QObject *owner, const QKeySequence &key = QKeySequence());
@@ -98,13 +102,6 @@ public:
 
 
 private:
-    bool correctWidgetContext(Qt::ShortcutContext context, QWidget *w, QWidget *active_window) const;
-#ifndef QT_NO_GRAPHICSVIEW
-    bool correctGraphicsWidgetContext(Qt::ShortcutContext context, QGraphicsWidget *w, QWidget *active_window) const;
-#endif
-#ifndef QT_NO_ACTION
-    bool correctContext(Qt::ShortcutContext context,QAction *a, QWidget *active_window) const;
-#endif
     QScopedPointer<QShortcutMapPrivate> d_ptr;
 
     QKeySequence::SequenceMatch find(QKeyEvent *e);