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Rename CK classes to AS classes
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Levi McCallum
committed by
Levi McCallum
Levi McCallum
parent
de66819286
commit
a0c05ebffc
246
AsyncDisplayKit/TextKit/ASTextKitCoreTextAdditions.m
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246
AsyncDisplayKit/TextKit/ASTextKitCoreTextAdditions.m
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/* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "ASTextKitCoreTextAdditions.h"
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#import <CoreText/CTFont.h>
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#import <CoreText/CTStringAttributes.h>
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#import "ASAssert.h"
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#pragma mark - Public
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BOOL ASAttributeWithNameIsUnsupportedCoreTextAttribute(NSString *attributeName)
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{
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static NSSet *coreTextAttributes;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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coreTextAttributes = [NSSet setWithObjects:(__bridge id)kCTForegroundColorAttributeName,
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kCTForegroundColorFromContextAttributeName,
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kCTForegroundColorAttributeName,
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kCTStrokeColorAttributeName,
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kCTUnderlineStyleAttributeName,
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kCTVerticalFormsAttributeName,
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kCTRunDelegateAttributeName,
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kCTBaselineClassAttributeName,
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kCTBaselineInfoAttributeName,
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kCTBaselineReferenceInfoAttributeName,
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kCTUnderlineColorAttributeName,
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nil];
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});
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return [coreTextAttributes containsObject:attributeName];
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}
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NSDictionary *NSAttributedStringAttributesForCoreTextAttributes(NSDictionary *coreTextAttributes)
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{
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NSMutableDictionary *cleanAttributes = [[NSMutableDictionary alloc] initWithCapacity:coreTextAttributes.count];
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[coreTextAttributes enumerateKeysAndObjectsUsingBlock:^(NSString *coreTextKey, id coreTextValue, BOOL *stop) {
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// The following attributes are not supported on NSAttributedString. Should they become available, we should add them.
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/*
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kCTForegroundColorFromContextAttributeName
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kCTSuperscriptAttributeName
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kCTGlyphInfoAttributeName
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kCTCharacterShapeAttributeName
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kCTLanguageAttributeName
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kCTRunDelegateAttributeName
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kCTBaselineClassAttributeName
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kCTBaselineInfoAttributeName
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kCTBaselineReferenceInfoAttributeName
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kCTWritingDirectionAttributeName
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kCTUnderlineColorAttributeName
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*/
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// Conversely, the following attributes are not supported on CFAttributedString. Should they become available, we should add them.
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/*
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NSStrikethroughStyleAttributeName
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NSShadowAttributeName
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NSBackgroundColorAttributeName
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*/
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// kCTFontAttributeName -> NSFontAttributeName
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if ([coreTextKey isEqualToString:(NSString *)kCTFontAttributeName]) {
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CTFontRef coreTextFont = (__bridge CTFontRef)coreTextValue;
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NSString *fontName = (__bridge_transfer NSString *)CTFontCopyPostScriptName(coreTextFont);
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CGFloat fontSize = CTFontGetSize(coreTextFont);
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UIFont *font = [UIFont fontWithName:fontName size:fontSize];
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ASDisplayNodeCAssertNotNil(font, @"unable to load font %@ with size %f", fontName, fontSize);
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if (font == nil) {
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// Gracefully fail if we were unable to load the font.
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font = [UIFont systemFontOfSize:fontSize];
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}
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cleanAttributes[NSFontAttributeName] = font;
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}
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// kCTKernAttributeName -> NSKernAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTKernAttributeName]) {
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cleanAttributes[NSKernAttributeName] = (NSNumber *)coreTextValue;
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}
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// kCTLigatureAttributeName -> NSLigatureAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTLigatureAttributeName]) {
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cleanAttributes[NSLigatureAttributeName] = (NSNumber *)coreTextValue;
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}
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// kCTForegroundColorAttributeName -> NSForegroundColorAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTForegroundColorAttributeName]) {
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cleanAttributes[NSForegroundColorAttributeName] = [UIColor colorWithCGColor:(CGColorRef)coreTextValue];
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}
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// kCTParagraphStyleAttributeName -> NSParagraphStyleAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTParagraphStyleAttributeName]) {
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cleanAttributes[NSParagraphStyleAttributeName] = [NSParagraphStyle paragraphStyleWithCTParagraphStyle:(CTParagraphStyleRef)coreTextValue];
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}
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// kCTStrokeWidthAttributeName -> NSStrokeWidthAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTStrokeWidthAttributeName]) {
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cleanAttributes[NSStrokeWidthAttributeName] = (NSNumber *)coreTextValue;
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}
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// kCTStrokeColorAttributeName -> NSStrokeColorAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTStrokeColorAttributeName]) {
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cleanAttributes[NSStrokeColorAttributeName] = [UIColor colorWithCGColor:(CGColorRef)coreTextValue];
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}
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// kCTUnderlineStyleAttributeName -> NSUnderlineStyleAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTUnderlineStyleAttributeName]) {
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cleanAttributes[NSUnderlineStyleAttributeName] = (NSNumber *)coreTextValue;
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}
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// kCTVerticalFormsAttributeName -> NSVerticalGlyphFormAttributeName
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else if ([coreTextKey isEqualToString:(NSString *)kCTVerticalFormsAttributeName]) {
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BOOL flag = (BOOL)CFBooleanGetValue((CFBooleanRef)coreTextValue);
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cleanAttributes[NSVerticalGlyphFormAttributeName] = @((int)flag); // NSVerticalGlyphFormAttributeName is documented to be an NSNumber with an integer that's either 0 or 1.
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}
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// Don't filter out any internal text attributes
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else if (!ASAttributeWithNameIsUnsupportedCoreTextAttribute(coreTextKey)){
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cleanAttributes[coreTextKey] = coreTextValue;
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}
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}];
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return cleanAttributes;
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}
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NSAttributedString *ASCleanseAttributedStringOfCoreTextAttributes(NSAttributedString *dirtyAttributedString)
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{
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if (!dirtyAttributedString)
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return nil;
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// First see if there are any core text attributes on the string
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__block BOOL containsCoreTextAttributes = NO;
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[dirtyAttributedString enumerateAttributesInRange:NSMakeRange(0, dirtyAttributedString.length)
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options:0
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usingBlock:^(NSDictionary *dirtyAttributes, NSRange range, BOOL *stop) {
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[dirtyAttributes enumerateKeysAndObjectsUsingBlock:^(NSString *coreTextKey, id coreTextValue, BOOL *innerStop) {
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if (ASAttributeWithNameIsUnsupportedCoreTextAttribute(coreTextKey)) {
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containsCoreTextAttributes = YES;
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*innerStop = YES;
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}
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}];
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*stop = containsCoreTextAttributes;
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}];
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if (containsCoreTextAttributes) {
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NSString *plainString = dirtyAttributedString.string;
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NSMutableAttributedString *cleanAttributedString = [[NSMutableAttributedString alloc] initWithString:plainString];
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// Iterate over all of the attributes, cleaning them as appropriate and applying them as we go.
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[dirtyAttributedString enumerateAttributesInRange:NSMakeRange(0, plainString.length)
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options:0
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usingBlock:^(NSDictionary *dirtyAttributes, NSRange range, BOOL *stop) {
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[cleanAttributedString addAttributes:NSAttributedStringAttributesForCoreTextAttributes(dirtyAttributes) range:range];
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}];
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return cleanAttributedString;
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} else {
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return [dirtyAttributedString copy];
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}
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}
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#pragma mark -
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#pragma mark -
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@implementation NSParagraphStyle (ASTextKitCoreTextAdditions)
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+ (instancetype)paragraphStyleWithCTParagraphStyle:(CTParagraphStyleRef)coreTextParagraphStyle;
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{
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NSMutableParagraphStyle *newParagraphStyle = [[NSMutableParagraphStyle alloc] init];
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if (!coreTextParagraphStyle)
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return newParagraphStyle;
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// The following paragraph style specifiers are not supported on NSParagraphStyle. Should they become available, we should add them.
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/*
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kCTParagraphStyleSpecifierTabStops
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kCTParagraphStyleSpecifierDefaultTabInterval
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kCTParagraphStyleSpecifierMaximumLineSpacing
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kCTParagraphStyleSpecifierMinimumLineSpacing
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kCTParagraphStyleSpecifierLineSpacingAdjustment
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kCTParagraphStyleSpecifierLineBoundsOptions
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*/
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// Conversely, the following paragraph styles are not supported on CTParagraphStyle. Should they become available, we should add them.
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/*
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hyphenationFactor
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*/
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// kCTParagraphStyleSpecifierAlignment -> alignment
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CTTextAlignment coreTextAlignment;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierAlignment, sizeof(coreTextAlignment), &coreTextAlignment))
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newParagraphStyle.alignment = NSTextAlignmentFromCTTextAlignment(coreTextAlignment);
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// kCTParagraphStyleSpecifierFirstLineHeadIndent -> firstLineHeadIndent
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CGFloat firstLineHeadIndent;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierFirstLineHeadIndent, sizeof(firstLineHeadIndent), &firstLineHeadIndent))
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newParagraphStyle.firstLineHeadIndent = firstLineHeadIndent;
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// kCTParagraphStyleSpecifierHeadIndent -> headIndent
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CGFloat headIndent;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierHeadIndent, sizeof(headIndent), &headIndent))
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newParagraphStyle.headIndent = headIndent;
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// kCTParagraphStyleSpecifierTailIndent -> tailIndent
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CGFloat tailIndent;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierTailIndent, sizeof(tailIndent), &tailIndent))
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newParagraphStyle.tailIndent = tailIndent;
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// kCTParagraphStyleSpecifierLineBreakMode -> lineBreakMode
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CTLineBreakMode coreTextLineBreakMode;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierLineBreakMode, sizeof(coreTextLineBreakMode), &coreTextLineBreakMode))
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newParagraphStyle.lineBreakMode = (NSLineBreakMode)coreTextLineBreakMode; // They're the same enum.
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// kCTParagraphStyleSpecifierLineHeightMultiple -> lineHeightMultiple
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CGFloat lineHeightMultiple;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierLineHeightMultiple, sizeof(lineHeightMultiple), &lineHeightMultiple))
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newParagraphStyle.lineHeightMultiple = lineHeightMultiple;
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// kCTParagraphStyleSpecifierMaximumLineHeight -> maximumLineHeight
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CGFloat maximumLineHeight;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierMaximumLineHeight, sizeof(maximumLineHeight), &maximumLineHeight))
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newParagraphStyle.maximumLineHeight = maximumLineHeight;
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// kCTParagraphStyleSpecifierMinimumLineHeight -> minimumLineHeight
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CGFloat minimumLineHeight;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierMinimumLineHeight, sizeof(minimumLineHeight), &minimumLineHeight))
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newParagraphStyle.minimumLineHeight = minimumLineHeight;
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// kCTParagraphStyleSpecifierLineSpacing -> lineSpacing
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// Note that kCTParagraphStyleSpecifierLineSpacing is deprecated and will die soon. We should not be using it.
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CGFloat lineSpacing;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierLineSpacing, sizeof(lineSpacing), &lineSpacing))
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newParagraphStyle.lineSpacing = lineSpacing;
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// kCTParagraphStyleSpecifierParagraphSpacing -> paragraphSpacing
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CGFloat paragraphSpacing;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierParagraphSpacing, sizeof(paragraphSpacing), ¶graphSpacing))
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newParagraphStyle.paragraphSpacing = paragraphSpacing;
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// kCTParagraphStyleSpecifierParagraphSpacingBefore -> paragraphSpacingBefore
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CGFloat paragraphSpacingBefore;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierParagraphSpacingBefore, sizeof(paragraphSpacingBefore), ¶graphSpacingBefore))
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newParagraphStyle.paragraphSpacingBefore = paragraphSpacingBefore;
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// kCTParagraphStyleSpecifierBaseWritingDirection -> baseWritingDirection
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CTWritingDirection coreTextBaseWritingDirection;
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if (CTParagraphStyleGetValueForSpecifier(coreTextParagraphStyle, kCTParagraphStyleSpecifierBaseWritingDirection, sizeof(coreTextBaseWritingDirection), &coreTextBaseWritingDirection))
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newParagraphStyle.baseWritingDirection = (NSWritingDirection)coreTextBaseWritingDirection; // They're the same enum.
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return newParagraphStyle;
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}
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@end
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