cocoa: don't override NSApplication-sendEvent if configured as AA_MacPluginApplication

Change-Id: I48cebbcb814ee8e97583c3165e7cb668077cfbad
Task-number: QTBUG-40409
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoaapplication.mm b/src/plugins/platforms/cocoa/qcocoaapplication.mm
index 551a59823c..bac76357da 100644
--- a/src/plugins/platforms/cocoa/qcocoaapplication.mm
+++ b/src/plugins/platforms/cocoa/qcocoaapplication.mm
@@ -189,6 +189,12 @@ QT_BEGIN_NAMESPACE
 
 void qt_redirectNSApplicationSendEvent()
 {
+    if (QCoreApplication::testAttribute(Qt::AA_MacPluginApplication))
+        // In a plugin we cannot chain sendEvent hooks: a second plugin could
+        // store the implementation of the first, which during the program flow
+        // can be unloaded.
+        return;
+
     if ([NSApp isMemberOfClass:[QNSApplication class]]) {
         // No need to change implementation since Qt
         // already controls a subclass of NSApplication
@@ -209,6 +215,10 @@ void qt_redirectNSApplicationSendEvent()
 
 void qt_resetNSApplicationSendEvent()
 {
+    if (QCoreApplication::testAttribute(Qt::AA_MacPluginApplication))
+        return;
+
+
     qt_cocoa_change_back_implementation([NSApplication class],
                                          @selector(sendEvent:),
                                          @selector(QT_MANGLE_NAMESPACE(qt_sendEvent_original):));