xcb: use keyboard event source window to determine auto-repeat value

The xcb auto-repeat checking code checks for queued events on the target
(focused) window. This breaks down if you have a native child widget,
and QKeyEvent::autoRepeat is never true.

Task-number: QTBUG-21500
Change-Id: Ia979edfa8a3afce07a3e1cbaa778541ffb9ce5dc
Reviewed-by: Gatis Paeglis <gatis.paeglis@digia.com>

src/plugins/platforms/xcb/qxcbconnection.cpp

@@ -466,7 +466,7 @@ break;
     if (QXcbWindowEventListener *eventListener = windowEventListenerFromId(e->event)) { \
         handled = eventListener->handleGenericEvent(event, &result); \
         if (!handled) \
-            m_keyboard->handler(m_focusWindow ? m_focusWindow : eventListener, e); \
+            m_keyboard->handler(e); \
     } \
 } \
 break;

src/plugins/platforms/xcb/qxcbkeyboard.cpp

@@ -1295,7 +1295,7 @@ private:
     bool m_release;
 };
 
-void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycode_t code,
+void QXcbKeyboard::handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type, xcb_keycode_t code,
                                   quint16 state, xcb_timestamp_t time)
 {
     Q_XCB_NOOP(connection());
@@ -1303,6 +1303,13 @@ void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycod
     if (!m_config)
         return;
 
+    QXcbWindow *source = connection()->platformWindowFromId(sourceWindow);
+    QXcbWindow *targetWindow = connection()->focusWindow() ? connection()->focusWindow() : source;
+    if (!targetWindow || !source)
+        return;
+    if (type == QEvent::KeyPress)
+        targetWindow->updateNetWmUserTime(time);
+
     // It is crucial the order of xkb_state_key_get_one_sym & xkb_state_update_key operations is not reversed!
     xcb_keysym_t sym = xkb_state_key_get_one_sym(xkb_state, code);
 
@@ -1343,7 +1350,7 @@ void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycod
         }
     } else {
         // look ahead for auto-repeat
-        KeyChecker checker(((QXcbWindow *)window->handle())->xcb_window(), code, time);
+        KeyChecker checker(source->xcb_window(), code, time);
         xcb_generic_event_t *event = connection()->checkEvent(checker);
         if (event) {
             isAutoRepeat = true;
@@ -1359,6 +1366,7 @@ void QXcbKeyboard::handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycod
         filtered = inputContext->filterEvent(&event);
     }
 
+    QWindow *window = targetWindow->window();
     if (!filtered) {
         if (type == QEvent::KeyPress && qtcode == Qt::Key_Menu) {
             const QPoint globalPos = window->screen()->handle()->cursor()->pos();
@@ -1401,21 +1409,14 @@ QString QXcbKeyboard::lookupString(struct xkb_state *state, xcb_keycode_t code)
     return QString::fromUtf8(chars);
 }
 
-void QXcbKeyboard::handleKeyPressEvent(QXcbWindowEventListener *eventListener, const xcb_key_press_event_t *event)
+void QXcbKeyboard::handleKeyPressEvent(const xcb_key_press_event_t *event)
 {
-    QXcbWindow *window = eventListener->toWindow();
+    handleKeyEvent(event->event, QEvent::KeyPress, event->detail, event->state, event->time);
-    if (!window)
-        return;
-    window->updateNetWmUserTime(event->time);
-    handleKeyEvent(window->window(), QEvent::KeyPress, event->detail, event->state, event->time);
 }
 
-void QXcbKeyboard::handleKeyReleaseEvent(QXcbWindowEventListener *eventListener, const xcb_key_release_event_t *event)
+void QXcbKeyboard::handleKeyReleaseEvent(const xcb_key_release_event_t *event)
 {
-    QXcbWindow *window = eventListener->toWindow();
+    handleKeyEvent(event->event, QEvent::KeyRelease, event->detail, event->state, event->time);
-    if (!window)
-        return;
-    handleKeyEvent(window->window(), QEvent::KeyRelease, event->detail, event->state, event->time);
 }
 
 void QXcbKeyboard::handleMappingNotifyEvent(const void *event)

src/plugins/platforms/xcb/qxcbkeyboard.h

@@ -64,8 +64,8 @@ public:
 
     ~QXcbKeyboard();
 
-    void handleKeyPressEvent(QXcbWindowEventListener *eventListener, const xcb_key_press_event_t *event);
+    void handleKeyPressEvent(const xcb_key_press_event_t *event);
-    void handleKeyReleaseEvent(QXcbWindowEventListener *eventListener, const xcb_key_release_event_t *event);
+    void handleKeyReleaseEvent(const xcb_key_release_event_t *event);
     void handleMappingNotifyEvent(const void *event);
 
     Qt::KeyboardModifiers translateModifiers(int s) const;
@@ -83,7 +83,7 @@ public:
 #endif
 
 protected:
-    void handleKeyEvent(QWindow *window, QEvent::Type type, xcb_keycode_t code, quint16 state, xcb_timestamp_t time);
+    void handleKeyEvent(xcb_window_t sourceWindow, QEvent::Type type, xcb_keycode_t code, quint16 state, xcb_timestamp_t time);
 
     void resolveMaskConflicts();
     QString lookupString(struct xkb_state *state, xcb_keycode_t code) const;