Cocoa: fix single punctuation input via CJK input method

2d05d3bd28 was not correct.

On OS X, when user uses CJK input method, only types single punctuation,
it was converted to CJK ones, and not showed in composing text.

Task-number: QTBUG-35700
Change-Id: I2d1063d2f837d075929dc5ebb5722fdefc6ee0f6
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>

src/plugins/platforms/cocoa/qnsview.h

@@ -71,6 +71,7 @@ QT_END_NAMESPACE
     bool m_subscribesForGlobalFrameNotifications;
     QCocoaGLContext *m_glContext;
     bool m_shouldSetGLContextinDrawRect;
+    NSString *m_inputSource;
 }
 
 - (id)init;

src/plugins/platforms/cocoa/qnsview.mm

@@ -90,6 +90,7 @@ static QTouchDevice *touchDevice = 0;
         m_shouldSetGLContextinDrawRect = false;
         currentCustomDragTypes = 0;
         m_sendUpAsRightButton = false;
+        m_inputSource = 0;
 
         if (!touchDevice) {
             touchDevice = new QTouchDevice;
@@ -108,6 +109,7 @@ static QTouchDevice *touchDevice = 0;
     m_maskData = 0;
     m_window = 0;
     m_subscribesForGlobalFrameNotifications = false;
+    [m_inputSource release];
     [[NSNotificationCenter defaultCenter] removeObserver:self];
 
     delete currentCustomDragTypes;
@@ -1222,6 +1224,10 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
     Qt::KeyboardModifiers modifiers = [QNSView convertKeyModifiers: nativeModifiers];
     NSString *charactersIgnoringModifiers = [nsevent charactersIgnoringModifiers];
     NSString *characters = [nsevent characters];
+    if (m_inputSource != characters) {
+        [m_inputSource release];
+        m_inputSource = [characters retain];
+    }
 
     // There is no way to get the scan code from carbon/cocoa. But we cannot
     // use the value 0, since it indicates that the event originates from somewhere
@@ -1352,7 +1358,7 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
 {
     Q_UNUSED(replacementRange)
 
-    if (m_sendKeyEvent && m_composingText.isEmpty()) {
+    if (m_sendKeyEvent && m_composingText.isEmpty() && [aString isEqualToString:m_inputSource]) {
         // don't send input method events for simple text input (let handleKeyEvent send key events instead)
         return;
     }