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ASTextNode wrong text layout fix

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This commit is contained in:
Alexey Glushkov
2015-11-22 11:56:12 +03:00
parent e16d32bb60
commit 42f56defbf
2 changed files with 25 additions and 15 deletions
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38
AsyncDisplayKit/ASTextNode.mm
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@@ -246,25 +246,13 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation
- (void)setFrame:(CGRect)frame
{
[super setFrame:frame];
if (!CGSizeEqualToSize(frame.size, _constrainedSize)) {
// Our bounds have changed to a size that is not identical to our constraining size,
// so our previous layout information is invalid, and TextKit may draw at the
// incorrect origin.
_constrainedSize = CGSizeMake(-INFINITY, -INFINITY);
[self _invalidateRenderer];
}
[self _invalidateRendererIfNeeded:frame.size];
}
- (void)setBounds:(CGRect)bounds
{
[super setBounds:bounds];
if (!CGSizeEqualToSize(bounds.size, _constrainedSize)) {
// Our bounds have changed to a size that is not identical to our constraining size,
// so our previous layout information is invalid, and TextKit may draw at the
// incorrect origin.
_constrainedSize = CGSizeMake(-INFINITY, -INFINITY);
[self _invalidateRenderer];
}
[self _invalidateRendererIfNeeded:bounds.size];
}
#pragma mark - Renderer Management
@@ -299,6 +287,26 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation
_renderer = nil;
}
- (BOOL)_needInvalidateRenderer:(CGSize)newSize
{
return !CGSizeEqualToSize(newSize, _constrainedSize);
}
- (void)_invalidateRendererIfNeeded {
[self _invalidateRendererIfNeeded:self.view.bounds.size];
}
- (void)_invalidateRendererIfNeeded:(CGSize)newSize
{
if ([self _needInvalidateRenderer:newSize]) {
// Our bounds of frame have changed to a size that is not identical to our constraining size,
// so our previous layout information is invalid, and TextKit may draw at the
// incorrect origin.
_constrainedSize = CGSizeMake(-INFINITY, -INFINITY);
[self _invalidateRenderer];
}
}
#pragma mark - Shadow Drawer Management
- (ASTextNodeShadower *)_shadower
{
@@ -410,6 +418,8 @@ static NSString *ASTextNodeTruncationTokenAttributeName = @"ASTextNodeTruncation
- (NSObject *)drawParametersForAsyncLayer:(_ASDisplayLayer *)layer
{
[self _invalidateRendererIfNeeded];
// Offset the text origin by any shadow padding
UIEdgeInsets shadowPadding = [self shadowPadding];
CGPoint textOrigin = CGPointMake(self.bounds.origin.x - shadowPadding.left, self.bounds.origin.y - shadowPadding.top);