macOS: Distinguish between return and enter when inserting newlines

In most situations the originating key event contains the information
we need, but during confirmation of input method composition the text
of the event might be "~\r", in which case the logic we have on macOS
for generating key events will interpret the key press as a tilde,
and we end up inserting "~~" and fail to deliver the return key.

We should probably treat NSEvents with characters > 1 as a special
case and go via the virtual key map in QAppleKeyMapper, but for now
we manually distinguish enter and return by looking at the modifiers.
This works for enter key presses both via the key itself, and via
Fn+Return.

Fixes: QTBUG-104774
Fixes: QTBUG-103473
Change-Id: I86d30b154867e8e2b6964967ede2bd0dadb83ef8
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 6767ac20c972f0f2654076c22826c392e698edfc)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/src/plugins/platforms/cocoa/qnsview_complextext.mm b/src/plugins/platforms/cocoa/qnsview_complextext.mm
index 4be8126299..ad5f5a0827 100644
--- a/src/plugins/platforms/cocoa/qnsview_complextext.mm
+++ b/src/plugins/platforms/cocoa/qnsview_complextext.mm
@@ -112,9 +112,14 @@
     KeyEvent newlineEvent(m_currentlyInterpretedKeyEvent ?
         m_currentlyInterpretedKeyEvent : NSApp.currentEvent);
     newlineEvent.type = QEvent::KeyPress;
-    newlineEvent.key = Qt::Key_Return;
-    newlineEvent.text = QLatin1Char(kReturnCharCode);
-    newlineEvent.nativeVirtualKey = kVK_Return;
+
+    const bool isEnter = newlineEvent.modifiers & Qt::KeypadModifier;
+    newlineEvent.key = isEnter ? Qt::Key_Enter : Qt::Key_Return;
+    newlineEvent.text = isEnter ? QLatin1Char(kEnterCharCode)
+                                : QLatin1Char(kReturnCharCode);
+    newlineEvent.nativeVirtualKey = isEnter ? kVK_ANSI_KeypadEnter
+                                            : kVK_Return;
+
     qCDebug(lcQpaKeys) << "Inserting newline via" << newlineEvent;
     newlineEvent.sendWindowSystemEvent(m_platformWindow->window());
 }