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Add ability to customize NSLayoutManager and NSTextStorage when created in the ASTextKitContext

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This commit is contained in:
rcancro
2016-02-22 13:00:02 -08:00
parent 896f0adcaf
commit 00b0968bf7
10 changed files with 60 additions and 26 deletions
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12
AsyncDisplayKit/TextKit/ASTextKitContext.mm
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@@ -29,16 +29,22 @@
maximumNumberOfLines:(NSUInteger)maximumNumberOfLines
exclusionPaths:(NSArray *)exclusionPaths
constrainedSize:(CGSize)constrainedSize
layoutManagerFactory:(NSLayoutManager*(*)(void))layoutManagerFactory
layoutManagerCreationBlock:(NSLayoutManager * (^)(void))layoutCreationBlock
layoutManagerDelegate:(id<NSLayoutManagerDelegate>)layoutManagerDelegate
textStorageCreationBlock:(NSTextStorage * (^)(NSAttributedString *attributedString))textStorageCreationBlock
{
if (self = [super init]) {
// Concurrently initialising TextKit components crashes (rdar://18448377) so we use a global lock.
static std::mutex __static_mutex;
std::lock_guard<std::mutex> l(__static_mutex);
// Create the TextKit component stack with our default configuration.
_textStorage = (attributedString ? [[NSTextStorage alloc] initWithAttributedString:attributedString] : [[NSTextStorage alloc] init]);
_layoutManager = layoutManagerFactory ? layoutManagerFactory() : [[ASLayoutManager alloc] init];
if (textStorageCreationBlock) {
_textStorage = textStorageCreationBlock(attributedString);
} else {
_textStorage = (attributedString ? [[NSTextStorage alloc] initWithAttributedString:attributedString] : [[NSTextStorage alloc] init]);
}
_layoutManager = layoutCreationBlock ? layoutCreationBlock() : [[ASLayoutManager alloc] init];
_layoutManager.usesFontLeading = NO;
_layoutManager.delegate = layoutManagerDelegate;
[_textStorage addLayoutManager:_layoutManager];