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Switch ASTextKitComponents interface C -> ObjC.

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This commit is contained in:
Nadine Salter
2015-01-25 16:24:10 -08:00
parent 35d7f43fb6
commit e0f926c861
5 changed files with 50 additions and 47 deletions
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41
AsyncDisplayKit/Details/ASTextNodeTextKitHelpers.mm
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@@ -10,26 +10,8 @@
@implementation ASTextKitComponents
@end
#pragma mark - Convenience
CGSize ASTextKitComponentsSizeForConstrainedWidth(ASTextKitComponents *components, CGFloat constrainedWidth)
{
// If our text-view's width is already the constrained width, we can use our existing TextKit stack for this sizing calculation.
// Otherwise, we create a temporary stack to size for `constrainedWidth`.
if (CGRectGetWidth(components.textView.bounds) != constrainedWidth) {
components = ASTextKitComponentsCreate(components.textStorage, CGSizeMake(constrainedWidth, FLT_MAX));
}
// Force glyph generation and layout, which may not have happened yet (and isn't triggered by -usedRectForTextContainer:).
[components.layoutManager ensureLayoutForTextContainer:components.textContainer];
CGSize textSize = [components.layoutManager usedRectForTextContainer:components.textContainer].size;
return textSize;
}
ASTextKitComponents *ASTextKitComponentsCreate(NSAttributedString *attributedSeedString, CGSize textContainerSize)
+ (ASTextKitComponents *)componentsWithAttributedSeedString:(NSAttributedString *)attributedSeedString
textContainerSize:(CGSize)textContainerSize
{
ASTextKitComponents *components = [[ASTextKitComponents alloc] init];
@@ -45,3 +27,22 @@ ASTextKitComponents *ASTextKitComponentsCreate(NSAttributedString *attributedSee
return components;
}
- (CGSize)sizeForConstrainedWidth:(CGFloat)constrainedWidth
{
ASTextKitComponents *components = self;
// If our text-view's width is already the constrained width, we can use our existing TextKit stack for this sizing calculation.
// Otherwise, we create a temporary stack to size for `constrainedWidth`.
if (CGRectGetWidth(components.textView.bounds) != constrainedWidth) {
components = [ASTextKitComponents componentsWithAttributedSeedString:components.textStorage textContainerSize:CGSizeMake(constrainedWidth, FLT_MAX)];
}
// Force glyph generation and layout, which may not have happened yet (and isn't triggered by -usedRectForTextContainer:).
[components.layoutManager ensureLayoutForTextContainer:components.textContainer];
CGSize textSize = [components.layoutManager usedRectForTextContainer:components.textContainer].size;
return textSize;
}
@end