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// PTHotKeyCenter.m
// Protein
//
// Created by Quentin Carnicelli on Sat Aug 02 2003.
// Copyright (c) 2003 Quentin D. Carnicelli. All rights reserved.
//
#import "PTHotKeyCenter.h"
#import "PTHotKey.h"
#import "PTKeyCombo.h"
#import <Carbon/Carbon.h>
#if __PROTEIN__
#import "PTNSObjectAdditions.h"
#endif
@interface PTHotKeyCenter ()
- (PTHotKey*)_hotKeyForCarbonHotKey: (EventHotKeyRef)carbonHotKey;
- (EventHotKeyRef)_carbonHotKeyForHotKey: (PTHotKey*)hotKey;
- (void)_updateEventHandler;
- (void)_hotKeyDown: (PTHotKey*)hotKey;
- (void)_hotKeyUp: (PTHotKey*)hotKey;
static OSStatus hotKeyEventHandler(EventHandlerCallRef inHandlerRef, EventRef inEvent, void* refCon );
@end
@implementation PTHotKeyCenter
static PTHotKeyCenter* _sharedHotKeyCenter = nil;
+ (PTHotKeyCenter*)sharedCenter
{
if( _sharedHotKeyCenter == nil )
{
_sharedHotKeyCenter = [[self alloc] init];
#if __PROTEIN__
[_sharedHotKeyCenter releaseOnTerminate];
#endif
}
return _sharedHotKeyCenter;
}
- (id)init
{
self = [super init];
if( self )
{
mHotKeys = [[NSMutableDictionary alloc] init];
}
return self;
}
- (void)dealloc
{
[mHotKeys release];
[super dealloc];
}
#pragma mark -
- (BOOL)registerHotKey: (PTHotKey*)hotKey
{
OSStatus err;
EventHotKeyID hotKeyID;
EventHotKeyRef carbonHotKey;
NSValue* key;
if( [[self allHotKeys] containsObject: hotKey] == YES )
[self unregisterHotKey: hotKey];
if( [[hotKey keyCombo] isValidHotKeyCombo] == NO )
return YES;
hotKeyID.signature = 'PTHk';
hotKeyID.id = (long)hotKey;
err = RegisterEventHotKey( [[hotKey keyCombo] keyCode],
[[hotKey keyCombo] modifiers],
hotKeyID,
GetEventDispatcherTarget(),
0,
&carbonHotKey );
if( err )
return NO;
key = [NSValue valueWithPointer: carbonHotKey];
if( hotKey && key )
[mHotKeys setObject: hotKey forKey: key];
[self _updateEventHandler];
return YES;
}
- (void)unregisterHotKey: (PTHotKey*)hotKey
{
OSStatus err;
EventHotKeyRef carbonHotKey;
NSValue* key;
if( [[self allHotKeys] containsObject: hotKey] == NO )
return;
carbonHotKey = [self _carbonHotKeyForHotKey: hotKey];
NSAssert( carbonHotKey != nil, @"" );
err = UnregisterEventHotKey( carbonHotKey );
//Watch as we ignore 'err':
key = [NSValue valueWithPointer: carbonHotKey];
[mHotKeys removeObjectForKey: key];
[self _updateEventHandler];
//See that? Completely ignored
}
- (NSArray*)allHotKeys
{
return [mHotKeys allValues];
}
- (PTHotKey*)hotKeyWithIdentifier: (id)ident
{
NSEnumerator* hotKeysEnum = [[self allHotKeys] objectEnumerator];
PTHotKey* hotKey;
if( !ident )
return nil;
while( (hotKey = [hotKeysEnum nextObject]) != nil )
{
if( [[hotKey identifier] isEqual: ident] )
return hotKey;
}
return nil;
}
#pragma mark -
- (PTHotKey*)_hotKeyForCarbonHotKey: (EventHotKeyRef)carbonHotKey
{
NSValue* key = [NSValue valueWithPointer: carbonHotKey];
return [mHotKeys objectForKey: key];
}
- (EventHotKeyRef)_carbonHotKeyForHotKey: (PTHotKey*)hotKey
{
NSArray* values;
NSValue* value;
values = [mHotKeys allKeysForObject: hotKey];
NSAssert( [values count] == 1, @"Failed to find Carbon Hotkey for PTHotKey" );
value = [values lastObject];
return (EventHotKeyRef)[value pointerValue];
}
- (void)_updateEventHandler
{
if( [mHotKeys count] && mEventHandlerInstalled == NO )
{
EventTypeSpec eventSpec[2] = {
{ kEventClassKeyboard, kEventHotKeyPressed },
{ kEventClassKeyboard, kEventHotKeyReleased }
};
InstallEventHandler( GetEventDispatcherTarget(),
(EventHandlerProcPtr)hotKeyEventHandler,
2, eventSpec, nil, nil);
mEventHandlerInstalled = YES;
}
}
- (void)_hotKeyDown: (PTHotKey*)hotKey
{
[hotKey invoke];
}
- (void)_hotKeyUp: (PTHotKey*)hotKey
{
}
- (OSStatus)sendCarbonEvent: (EventRef)event
{
OSStatus err;
EventHotKeyID hotKeyID;
PTHotKey* hotKey;
NSAssert( GetEventClass( event ) == kEventClassKeyboard, @"Unknown event class" );
err = GetEventParameter( event,
kEventParamDirectObject,
typeEventHotKeyID,
nil,
sizeof(EventHotKeyID),
nil,
&hotKeyID );
if( err )
return err;
NSAssert( hotKeyID.signature == 'PTHk', @"Invalid hot key id" );
NSAssert( hotKeyID.id != 0, @"Invalid hot key id" );
hotKey = (PTHotKey*)hotKeyID.id;
switch( GetEventKind( event ) )
{
case kEventHotKeyPressed:
[self _hotKeyDown: hotKey];
break;
case kEventHotKeyReleased:
[self _hotKeyUp: hotKey];
break;
default:
NSAssert( 0, @"Unknown event kind" );
break;
}
return noErr;
}
static OSStatus hotKeyEventHandler(EventHandlerCallRef inHandlerRef, EventRef inEvent, void* refCon )
{
return [[PTHotKeyCenter sharedCenter] sendCarbonEvent: inEvent];
}
@end
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