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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// Only compile this code on Mac. These files should not be included on your iOS project.
+// But in case they are included, it won't be compiled.
+#import <Availability.h>
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+#elif defined(__MAC_OS_X_VERSION_MAX_ALLOWED)
+
+#import "CCEventDispatcher.h"
+#import "../../ccConfig.h"
+
+static CCEventDispatcher *sharedDispatcher = nil;
+
+enum  {
+        // mouse
+        kCCImplementsMouseDown                  = 1 << 0,
+        kCCImplementsMouseMoved                 = 1 << 1,
+        kCCImplementsMouseDragged               = 1 << 2,       
+        kCCImplementsMouseUp                    = 1 << 3,
+        kCCImplementsRightMouseDown             = 1 << 4,
+        kCCImplementsRightMouseDragged  = 1 << 5,
+        kCCImplementsRightMouseUp               = 1 << 6,
+        kCCImplementsOtherMouseDown             = 1 << 7,
+        kCCImplementsOtherMouseDragged  = 1 << 8,
+        kCCImplementsOtherMouseUp               = 1 << 9,
+        kCCImplementsScrollWheel                = 1 << 10,
+        kCCImplementsMouseEntered               = 1 << 11,
+        kCCImplementsMouseExited                = 1 << 12,
+
+        kCCImplementsTouchesBegan               = 1 << 13,
+        kCCImplementsTouchesMoved               = 1 << 14,
+        kCCImplementsTouchesEnded               = 1 << 15,
+        kCCImplementsTouchesCancelled           = 1 << 16,
+
+        // keyboard
+        kCCImplementsKeyUp                              = 1 << 0,
+        kCCImplementsKeyDown                    = 1 << 1,
+        kCCImplementsFlagsChanged               = 1 << 2,
+};
+
+
+typedef struct _listEntry
+{
+        struct  _listEntry      *prev, *next;
+        id                                      delegate;
+        NSInteger                       priority;
+        NSUInteger                      flags;
+} tListEntry;
+
+
+#if CC_DIRECTOR_MAC_USE_DISPLAY_LINK_THREAD
+
+#define QUEUE_EVENT_MAX 128
+struct _eventQueue {
+        SEL             selector;
+        NSEvent *event;
+};
+
+static struct   _eventQueue eventQueue[QUEUE_EVENT_MAX];
+static int              eventQueueCount;
+
+#endif // CC_DIRECTOR_MAC_USE_DISPLAY_LINK_THREAD
+
+
+@implementation CCEventDispatcher
+
+@synthesize dispatchEvents=dispatchEvents_;
+
+
++(CCEventDispatcher*) sharedDispatcher
+{
+        @synchronized(self) {
+                if (sharedDispatcher == nil)
+                        sharedDispatcher = [[self alloc] init]; // assignment not done here
+        }
+        return sharedDispatcher;
+}
+
++(id) allocWithZone:(NSZone *)zone
+{
+        @synchronized(self) {
+                NSAssert(sharedDispatcher == nil, @"Attempted to allocate a second instance of a singleton.");
+                return [super allocWithZone:zone];
+        }
+        return nil; // on subsequent allocation attempts return nil
+}
+
+-(id) init
+{
+        if( (self = [super init]) )
+        {
+                // events enabled by default
+                dispatchEvents_ = YES;
+
+                // delegates
+                keyboardDelegates_ = NULL;
+                mouseDelegates_ = NULL;
+                touchDelegates_ = NULL;
+                
+#if     CC_DIRECTOR_MAC_USE_DISPLAY_LINK_THREAD
+                eventQueueCount = 0;
+#endif
+        }
+        
+        return self;
+}
+
+- (void) dealloc
+{
+        [super dealloc];
+}
+
+#pragma mark CCEventDispatcher - add / remove delegates
+
+-(void) addDelegate:(id)delegate priority:(NSInteger)priority flags:(NSUInteger)flags list:(tListEntry**)list
+{
+        tListEntry *listElement = malloc( sizeof(*listElement) );
+        
+        listElement->delegate = [delegate retain];
+        listElement->priority = priority;
+        listElement->flags = flags;
+        listElement->next = listElement->prev = NULL;
+        
+        // empty list ?
+        if( ! *list ) {
+                DL_APPEND( *list, listElement );
+                
+        } else {
+                BOOL added = NO;                
+                
+                for( tListEntry *elem = *list; elem ; elem = elem->next ) {
+                        if( priority < elem->priority ) {
+                                
+                                if( elem == *list )
+                                        DL_PREPEND(*list, listElement);
+                                else {
+                                        listElement->next = elem;
+                                        listElement->prev = elem->prev;
+                                        
+                                        elem->prev->next = listElement;
+                                        elem->prev = listElement;
+                                }
+                                
+                                added = YES;
+                                break;
+                        }
+                }
+                
+                // Not added? priority has the higher value. Append it.
+                if( !added )
+                        DL_APPEND(*list, listElement);
+        }
+}
+
+-(void) removeDelegate:(id)delegate fromList:(tListEntry**)list
+{
+        tListEntry *entry, *tmp;
+        
+        // updates with priority < 0
+        DL_FOREACH_SAFE( *list, entry, tmp ) {
+                if( entry->delegate == delegate ) {
+                        DL_DELETE( *list, entry );
+                        [delegate release];
+                        free(entry);
+                        break;
+                }
+        }
+}
+
+-(void) removeAllDelegatesFromList:(tListEntry**)list
+{
+        tListEntry *entry, *tmp;
+
+        DL_FOREACH_SAFE( *list, entry, tmp ) {
+                DL_DELETE( *list, entry );
+                free(entry);
+        }
+}
+
+
+-(void) addMouseDelegate:(id<CCMouseEventDelegate>) delegate priority:(NSInteger)priority
+{
+        NSUInteger flags = 0;
+        
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseDown:)] ? kCCImplementsMouseDown : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseDragged:)] ? kCCImplementsMouseDragged : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseMoved:)] ? kCCImplementsMouseMoved : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseUp:)] ? kCCImplementsMouseUp : 0 );
+
+        flags |= ( [delegate respondsToSelector:@selector(ccRightMouseDown:)] ? kCCImplementsRightMouseDown : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccRightMouseDragged:)] ? kCCImplementsRightMouseDragged : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccRightMouseUp:)] ? kCCImplementsRightMouseUp : 0 );
+
+        flags |= ( [delegate respondsToSelector:@selector(ccOtherMouseDown:)] ? kCCImplementsOtherMouseDown : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccOtherMouseDragged:)] ? kCCImplementsOtherMouseDragged : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccOtherMouseUp:)] ? kCCImplementsOtherMouseUp : 0 );
+
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseEntered:)] ? kCCImplementsMouseEntered : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccMouseExited:)] ? kCCImplementsMouseExited : 0 );
+
+        flags |= ( [delegate respondsToSelector:@selector(ccScrollWheel:)] ? kCCImplementsScrollWheel : 0 );
+
+        [self addDelegate:delegate priority:priority flags:flags list:&mouseDelegates_];
+}
+
+-(void) removeMouseDelegate:(id) delegate
+{
+        [self removeDelegate:delegate fromList:&mouseDelegates_];
+}
+
+-(void) removeAllMouseDelegates
+{
+        [self removeAllDelegatesFromList:&mouseDelegates_];
+}
+
+-(void) addKeyboardDelegate:(id<CCKeyboardEventDelegate>) delegate priority:(NSInteger)priority
+{
+        NSUInteger flags = 0;
+        
+        flags |= ( [delegate respondsToSelector:@selector(ccKeyUp:)] ? kCCImplementsKeyUp : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccKeyDown:)] ? kCCImplementsKeyDown : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccFlagsChanged:)] ? kCCImplementsFlagsChanged : 0 );
+        
+        [self addDelegate:delegate priority:priority flags:flags list:&keyboardDelegates_];
+}
+
+-(void) removeKeyboardDelegate:(id) delegate
+{
+        [self removeDelegate:delegate fromList:&keyboardDelegates_];
+}
+
+-(void) removeAllKeyboardDelegates
+{
+        [self removeAllDelegatesFromList:&keyboardDelegates_];
+}
+
+-(void) addTouchDelegate:(id<CCTouchEventDelegate>) delegate priority:(NSInteger)priority
+{
+        NSUInteger flags = 0;
+        
+        flags |= ( [delegate respondsToSelector:@selector(ccTouchesBeganWithEvent:)] ? kCCImplementsTouchesBegan : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccTouchesMovedWithEvent:)] ? kCCImplementsTouchesMoved : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccTouchesEndedWithEvent:)] ? kCCImplementsTouchesEnded : 0 );
+        flags |= ( [delegate respondsToSelector:@selector(ccTouchesCancelledWithEvent:)] ? kCCImplementsTouchesCancelled : 0 );
+        
+        [self addDelegate:delegate priority:priority flags:flags list:&touchDelegates_];
+}
+
+-(void) removeTouchDelegate:(id) delegate
+{
+        [self removeDelegate:delegate fromList:&touchDelegates_];
+}
+
+-(void) removeAllTouchDelegates
+{
+        [self removeAllDelegatesFromList:&touchDelegates_];
+}
+
+
+#pragma mark CCEventDispatcher - Mouse events
+//
+// Mouse events
+//
+
+//
+// Left
+//
+- (void)mouseDown:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseDown ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseDown:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)mouseMoved:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseMoved ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseMoved:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)mouseDragged:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseDragged ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseDragged:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)mouseUp:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseUp ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseUp:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+//
+// Mouse Right
+//
+- (void)rightMouseDown:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsRightMouseDown ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccRightMouseDown:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)rightMouseDragged:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsRightMouseDragged ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccRightMouseDragged:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)rightMouseUp:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsRightMouseUp ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccRightMouseUp:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+//
+// Mouse Other
+//
+- (void)otherMouseDown:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsOtherMouseDown ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccOtherMouseDown:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)otherMouseDragged:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsOtherMouseDragged ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccOtherMouseDragged:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)otherMouseUp:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsOtherMouseUp ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccOtherMouseUp:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+//
+// Scroll Wheel
+//
+- (void)scrollWheel:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsScrollWheel ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccScrollWheel:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+//
+// Mouse enter / exit
+- (void)mouseExited:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseEntered ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseEntered:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+- (void)mouseEntered:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( mouseDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsMouseExited) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccMouseExited:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+
+#pragma mark CCEventDispatcher - Keyboard events
+
+// Keyboard events
+- (void)keyDown:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( keyboardDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsKeyDown ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccKeyDown:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)keyUp:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( keyboardDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsKeyUp ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccKeyUp:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+- (void)flagsChanged:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( keyboardDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsFlagsChanged ) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccFlagsChanged:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }
+}
+
+
+#pragma mark CCEventDispatcher - Touch events
+
+- (void)touchesBeganWithEvent:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( touchDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsTouchesBegan) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccTouchesBeganWithEvent:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+- (void)touchesMovedWithEvent:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( touchDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsTouchesMoved) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccTouchesMovedWithEvent:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+- (void)touchesEndedWithEvent:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( touchDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsTouchesEnded) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccTouchesEndedWithEvent:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+- (void)touchesCancelledWithEvent:(NSEvent *)event
+{
+        if( dispatchEvents_ ) {
+                tListEntry *entry, *tmp;
+                
+                DL_FOREACH_SAFE( touchDelegates_, entry, tmp ) {
+                        if ( entry->flags & kCCImplementsTouchesCancelled) {
+                                void *swallows = [entry->delegate performSelector:@selector(ccTouchesCancelledWithEvent:) withObject:event];
+                                if( swallows )
+                                        break;
+                        }
+                }
+        }       
+}
+
+
+#pragma mark CCEventDispatcher - queue events
+
+#if CC_DIRECTOR_MAC_USE_DISPLAY_LINK_THREAD
+-(void) queueEvent:(NSEvent*)event selector:(SEL)selector
+{
+        NSAssert( eventQueueCount < QUEUE_EVENT_MAX, @"CCEventDispatcher: recompile. Increment QUEUE_EVENT_MAX value");
+
+        @synchronized (self) {
+                eventQueue[eventQueueCount].selector = selector;
+                eventQueue[eventQueueCount].event = [event copy];
+                
+                eventQueueCount++;
+        }
+}
+
+-(void) dispatchQueuedEvents
+{
+        @synchronized (self) {
+                for( int i=0; i < eventQueueCount; i++ ) {
+                        SEL sel = eventQueue[i].selector;
+                        NSEvent *event = eventQueue[i].event;
+                        
+                        [self performSelector:sel withObject:event];
+                        
+                        [event release];
+                }
+                
+                eventQueueCount = 0;
+        }
+}
+#endif // CC_DIRECTOR_MAC_USE_DISPLAY_LINK_THREAD
+
+
+@end
+
+#endif // __MAC_OS_X_VERSION_MAX_ALLOWED