89eae00479
* Switch license file to AGPL * Update file copyright headers * Update the default project file header
75 lines
2.6 KiB
Objective-C
75 lines
2.6 KiB
Objective-C
//
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// Copyright 2022-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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#import "UIFont+AttributedStringBuilder.h"
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@import UIKit;
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@import CoreText;
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@import ObjectiveC;
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#pragma mark - UIFont DTCoreText fix
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@interface UIFont (vc_DTCoreTextFix)
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+ (UIFont *)vc_fixedFontWithCTFont:(CTFontRef)ctFont;
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@end
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@implementation UIFont (vc_DTCoreTextFix)
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+ (UIFont *)vc_fixedFontWithCTFont:(CTFontRef)ctFont {
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NSString *fontName = (__bridge_transfer NSString *)CTFontCopyName(ctFont, kCTFontPostScriptNameKey);
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CGFloat fontSize = CTFontGetSize(ctFont);
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UIFont *font = [UIFont fontWithName:fontName size:fontSize];
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// On iOS 13+ "TimesNewRomanPSMT" will be used instead of "SFUI"
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// In case of "Times New Roman" fallback, use system font and reuse UIFontDescriptorSymbolicTraits.
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if ([font.familyName.lowercaseString containsString:@"times"]) {
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UIFontDescriptorSymbolicTraits symbolicTraits = (UIFontDescriptorSymbolicTraits)CTFontGetSymbolicTraits(ctFont);
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// Start with the body text style and update it to keep consistent line spacing with plain text messages.
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UIFontDescriptor *fontDescriptor = [UIFontDescriptor preferredFontDescriptorWithTextStyle:UIFontTextStyleBody];
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fontDescriptor = [fontDescriptor fontDescriptorWithSize:fontSize];
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fontDescriptor = [fontDescriptor fontDescriptorWithSymbolicTraits:symbolicTraits];
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font = [UIFont fontWithDescriptor:fontDescriptor size:fontSize];
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}
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return font;
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}
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@end
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#pragma mark - Implementation
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@implementation UIFont(DTCoreTextFix)
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// DTCoreText iOS 13 fix. See issue and comment here: https://github.com/Cocoanetics/DTCoreText/issues/1168#issuecomment-583541514
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// Also see https://github.com/Cocoanetics/DTCoreText/pull/1245 for a possible future solution
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+ (void)load
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{
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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Class originalClass = object_getClass([UIFont class]);
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wundeclared-selector"
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SEL originalSelector = @selector(fontWithCTFont:); // DTCoreText method we're overriding
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SEL ourSelector = @selector(vc_fixedFontWithCTFont:); // Use custom implementation
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#pragma clang diagnostic pop
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Method originalMethod = class_getClassMethod(originalClass, originalSelector);
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Method swizzledMethod = class_getClassMethod(originalClass, ourSelector);
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method_exchangeImplementations(originalMethod, swizzledMethod);
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});
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}
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@end
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