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cache respondsToSelector: ; Fire the timer only if both methods exists

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cacaodev
2011-03-24 18:40:25 +01:00
parent a02b721944
commit 4b9695ff50
1 changed files with 41 additions and 9 deletions
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AppKit/CPScrollView.j
+41 -9
View File
@@ -35,7 +35,10 @@
contents of the view.
*/
var TIMER_INTERVAL = 0.2;
var TIMER_INTERVAL = 0.2,
CPScrollViewDelegate_scrollViewWillScroll_ = 1 << 0,
CPScrollViewDelegate_scrollViewDidScroll_ = 1 << 1;
@implementation CPScrollView : CPView
{
@@ -43,7 +46,8 @@ var TIMER_INTERVAL = 0.2;
CPClipView _headerClipView;
CPView _cornerView;
CPView _bottomCornerView;
id _delegate @accessors(property=delegate);
id _delegate;
CPTimer _scrollTimer;
BOOL _hasVerticalScroller;
@@ -53,7 +57,8 @@ var TIMER_INTERVAL = 0.2;
CPScroller _verticalScroller;
CPScroller _horizontalScroller;
int _recursionCount;
CPInteger _recursionCount;
CPInteger _implementedDelegateMethods;
float _verticalLineScroll;
float _verticalPageScroll;
@@ -104,11 +109,34 @@ var TIMER_INTERVAL = 0.2;
_delegate = nil;
_scrollTimer = nil;
_implementedDelegateMethods = 0;
}
return self;
}
- (id)delegate
{
return _delegate;
}
- (void)setDelegate:(id)aDelegate
{
if (aDelegate === _delegate)
return;
_delegate = aDelegate;
_implementedDelegateMethods = 0;
if (_delegate === nil)
return;
if ([_delegate respondsToSelector:@selector(scrollViewWillScroll:)])
_implementedDelegateMethods |= CPScrollViewDelegate_scrollViewWillScroll_;
if ([_delegate respondsToSelector:@selector(scrollViewDidScroll:)])
_implementedDelegateMethods |= CPScrollViewDelegate_scrollViewDidScroll_;
}
// Calculating Layout
+ (CGSize)contentSizeForFrameSize:(CGSize)frameSize hasHorizontalScroller:(BOOL)hFlag hasVerticalScroller:(BOOL)vFlag borderType:(CPBorderType)borderType
@@ -661,8 +689,8 @@ var TIMER_INTERVAL = 0.2;
}
[self _sendDelegateMessages];
[_contentView scrollToPoint:contentBounds.origin];
[_contentView scrollToPoint:contentBounds.origin];
}
/* @ignore */
@@ -1037,15 +1065,18 @@ var TIMER_INTERVAL = 0.2;
contentBounds.origin.y += aSize.height;
[_contentView scrollToPoint:contentBounds.origin];
[_headerClipView scrollToPoint:CGPointMake(contentBounds.origin.x, 0)];
[_headerClipView scrollToPoint:CGPointMake(contentBounds.origin.x, 0)];
}
- (void)_sendDelegateMessages
{
if (_implementedDelegateMethods == 0)
return;
if (!_scrollTimer)
{
[self _scrollViewWillScroll];
_scrollTimer = [CPTimer scheduledTimerWithTimeInterval:TIMER_INTERVAL target:self selector:@selector(_scrollViewDidScroll) userInfo:nil repeats:YES];
_scrollTimer = [CPTimer scheduledTimerWithTimeInterval:TIMER_INTERVAL target:self selector:@selector(_scrollViewDidScroll) userInfo:nil repeats:YES];
}
else
[_scrollTimer setFireDate:[CPDate dateWithTimeIntervalSinceNow:TIMER_INTERVAL]];
@@ -1053,7 +1084,7 @@ var TIMER_INTERVAL = 0.2;
- (void)_scrollViewWillScroll
{
if ([_delegate respondsToSelector:@selector(scrollViewWillScroll:)])
if (_implementedDelegateMethods & CPScrollViewDelegate_scrollViewWillScroll_)
[_delegate scrollViewWillScroll:self];
}
@@ -1062,7 +1093,7 @@ var TIMER_INTERVAL = 0.2;
[_scrollTimer invalidate];
_scrollTimer = nil;
if ([_delegate respondsToSelector:@selector(scrollViewDidScroll:)])
if (_implementedDelegateMethods & CPScrollViewDelegate_scrollViewDidScroll_)
[_delegate scrollViewDidScroll:self];
}
@@ -1118,6 +1149,7 @@ var CPScrollViewContentViewKey = @"CPScrollViewContentView",
_delegate = nil;
_scrollTimer = nil;
_implementedDelegateMethods = 0;
// Do to the anything goes nature of decoding, our subviews may not exist yet, so layout at the end of the run loop when we're sure everything is in a correct state.
[[CPRunLoop currentRunLoop] performSelector:@selector(_updateCornerAndHeaderView) target:self argument:_contentView order:0 modes:[CPDefaultRunLoopMode]];
}