Merge pull request #5880

8b60808 [QT] some mac specifiy cleanup (memory handling, unnecessary code) (Jonas Schnelli)
89e70e9 [QT] fix OSX dock icon window reopening (Jonas Schnelli)

src/qt/bitcoingui.cpp

@@ -237,7 +237,7 @@ BitcoinGUI::~BitcoinGUI()
         trayIcon->hide();
 #ifdef Q_OS_MAC
     delete appMenuBar;
-    MacDockIconHandler::instance()->setMainWindow(NULL);
+    MacDockIconHandler::cleanup();
 #endif
 
     delete rpcConsole;

src/qt/macdockiconhandler.h

@@ -14,12 +14,6 @@ class QMenu;
 class QWidget;
 QT_END_NAMESPACE
 
-#ifdef __OBJC__
-@class DockIconClickEventHandler;
-#else
-class DockIconClickEventHandler;
-#endif
-
 /** Macintosh-specific dock icon handler.
  */
 class MacDockIconHandler : public QObject
@@ -33,7 +27,7 @@ public:
     void setIcon(const QIcon &icon);
     void setMainWindow(QMainWindow *window);
     static MacDockIconHandler *instance();
-
+    static void cleanup();
     void handleDockIconClickEvent();
 
 signals:
@@ -42,7 +36,6 @@ signals:
 private:
     MacDockIconHandler();
 
-    DockIconClickEventHandler *m_dockIconClickEventHandler;
     QWidget *m_dummyWidget;
     QMenu *m_dockMenu;
     QMainWindow *mainWindow;

src/qt/macdockiconhandler.mm

@@ -11,52 +11,46 @@
 
 #undef slots
 #include <Cocoa/Cocoa.h>
+#include <objc/objc.h>
+#include <objc/message.h>
 
 #if QT_VERSION < 0x050000
 extern void qt_mac_set_dock_menu(QMenu *);
 #endif
 
-@interface DockIconClickEventHandler : NSObject
-{
-    MacDockIconHandler* dockIconHandler;
-}
+static MacDockIconHandler *s_instance = NULL;
 
-@end
+bool dockClickHandler(id self,SEL _cmd,...) {
+    Q_UNUSED(self)
+    Q_UNUSED(_cmd)
     
-@implementation DockIconClickEventHandler
+    s_instance->handleDockIconClickEvent();
     
-- (id)initWithDockIconHandler:(MacDockIconHandler *)aDockIconHandler
-{
-    self = [super init];
-    if (self) {
-        dockIconHandler = aDockIconHandler;
-
-        [[NSAppleEventManager sharedAppleEventManager]
-            setEventHandler:self
-                andSelector:@selector(handleDockClickEvent:withReplyEvent:)
-              forEventClass:kCoreEventClass
-                 andEventID:kAEReopenApplication];
-    }
-    return self;
+    // Return NO (false) to suppress the default OS X actions
+    return false;
 }
 
-- (void)handleDockClickEvent:(NSAppleEventDescriptor*)event withReplyEvent:(NSAppleEventDescriptor*)replyEvent
-{
-    Q_UNUSED(event)
-    Q_UNUSED(replyEvent)
-
-    if (dockIconHandler) {
-        dockIconHandler->handleDockIconClickEvent();
+void setupDockClickHandler() {
+    Class cls = objc_getClass("NSApplication");
+    id appInst = objc_msgSend((id)cls, sel_registerName("sharedApplication"));
+    
+    if (appInst != NULL) {
+        id delegate = objc_msgSend(appInst, sel_registerName("delegate"));
+        Class delClass = (Class)objc_msgSend(delegate,  sel_registerName("class"));
+        SEL shouldHandle = sel_registerName("applicationShouldHandleReopen:hasVisibleWindows:");
+        if (class_getInstanceMethod(delClass, shouldHandle))
+            class_replaceMethod(delClass, shouldHandle, (IMP)dockClickHandler, "B@:");
+        else
+            class_addMethod(delClass, shouldHandle, (IMP)dockClickHandler,"B@:");
     }
 }
 
-@end
 
 MacDockIconHandler::MacDockIconHandler() : QObject()
 {
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 
-    this->m_dockIconClickEventHandler = [[DockIconClickEventHandler alloc] initWithDockIconHandler:this];
+    setupDockClickHandler();
     this->m_dummyWidget = new QWidget();
     this->m_dockMenu = new QMenu(this->m_dummyWidget);
     this->setMainWindow(NULL);
@@ -74,7 +68,6 @@ void MacDockIconHandler::setMainWindow(QMainWindow *window) {
 
 MacDockIconHandler::~MacDockIconHandler()
 {
-    [this->m_dockIconClickEventHandler release];
     delete this->m_dummyWidget;
     this->setMainWindow(NULL);
 }
@@ -119,12 +112,16 @@ void MacDockIconHandler::setIcon(const QIcon &icon)
 
 MacDockIconHandler *MacDockIconHandler::instance()
 {
-    static MacDockIconHandler *s_instance = NULL;
     if (!s_instance)
         s_instance = new MacDockIconHandler();
     return s_instance;
 }
 
+void MacDockIconHandler::cleanup()
+{
+    delete s_instance;
+}
+
 void MacDockIconHandler::handleDockIconClickEvent()
 {
     if (this->mainWindow)