492 lines
17 KiB
Plaintext
492 lines
17 KiB
Plaintext
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/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTFont.h"
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#import "RCTAssert.h"
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#import "RCTLog.h"
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#import <CoreText/CoreText.h>
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typedef CGFloat RCTFontWeight;
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static RCTFontWeight weightOfFont(UIFont *font)
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{
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static NSArray<NSString *> *weightSuffixes;
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static NSArray<NSNumber *> *fontWeights;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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// We use two arrays instead of one map because
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// the order is important for suffix matching.
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weightSuffixes = @[
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@"normal",
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@"ultralight",
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@"thin",
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@"light",
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@"regular",
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@"medium",
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@"semibold",
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@"demibold",
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@"extrabold",
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@"ultrabold",
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@"bold",
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@"heavy",
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@"black"
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];
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fontWeights = @[
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@(UIFontWeightRegular),
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@(UIFontWeightUltraLight),
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@(UIFontWeightThin),
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@(UIFontWeightLight),
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@(UIFontWeightRegular),
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@(UIFontWeightMedium),
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@(UIFontWeightSemibold),
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@(UIFontWeightSemibold),
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@(UIFontWeightHeavy),
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@(UIFontWeightHeavy),
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@(UIFontWeightBold),
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@(UIFontWeightHeavy),
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@(UIFontWeightBlack)
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];
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});
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NSString *fontName = font.fontName;
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NSInteger i = 0;
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for (NSString *suffix in weightSuffixes) {
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// CFStringFind is much faster than any variant of rangeOfString: because it does not use a locale.
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auto options = kCFCompareCaseInsensitive | kCFCompareAnchored | kCFCompareBackwards;
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if (CFStringFind((CFStringRef)fontName, (CFStringRef)suffix, options).location != kCFNotFound) {
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return (RCTFontWeight)fontWeights[i].doubleValue;
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}
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i++;
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}
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auto traits = (__bridge_transfer NSDictionary *)CTFontCopyTraits((CTFontRef)font);
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return (RCTFontWeight)[traits[UIFontWeightTrait] doubleValue];
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}
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static BOOL isItalicFont(UIFont *font)
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{
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return (CTFontGetSymbolicTraits((CTFontRef)font) & kCTFontTraitItalic) != 0;
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}
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static BOOL isCondensedFont(UIFont *font)
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{
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return (CTFontGetSymbolicTraits((CTFontRef)font) & kCTFontTraitCondensed) != 0;
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}
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static RCTFontHandler defaultFontHandler;
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void RCTSetDefaultFontHandler(RCTFontHandler handler)
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{
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defaultFontHandler = handler;
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}
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BOOL RCTHasFontHandlerSet()
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{
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return defaultFontHandler != nil;
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}
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// We pass a string description of the font weight to the defaultFontHandler because UIFontWeight
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// is not defined pre-iOS 8.2.
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// Furthermore, UIFontWeight's are lossy floats, so we must use an inexact compare to figure out
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// which one we actually have.
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static inline BOOL CompareFontWeights(UIFontWeight firstWeight, UIFontWeight secondWeight)
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{
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#if CGFLOAT_IS_DOUBLE
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return fabs(firstWeight - secondWeight) < 0.01;
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#else
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return fabsf(firstWeight - secondWeight) < 0.01;
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#endif
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}
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static NSString *FontWeightDescriptionFromUIFontWeight(UIFontWeight fontWeight)
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{
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if (CompareFontWeights(fontWeight, UIFontWeightUltraLight)) {
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return @"ultralight";
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} else if (CompareFontWeights(fontWeight, UIFontWeightThin)) {
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return @"thin";
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} else if (CompareFontWeights(fontWeight, UIFontWeightLight)) {
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return @"light";
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} else if (CompareFontWeights(fontWeight, UIFontWeightRegular)) {
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return @"regular";
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} else if (CompareFontWeights(fontWeight, UIFontWeightMedium)) {
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return @"medium";
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} else if (CompareFontWeights(fontWeight, UIFontWeightSemibold)) {
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return @"semibold";
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} else if (CompareFontWeights(fontWeight, UIFontWeightBold)) {
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return @"bold";
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} else if (CompareFontWeights(fontWeight, UIFontWeightHeavy)) {
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return @"heavy";
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} else if (CompareFontWeights(fontWeight, UIFontWeightBlack)) {
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return @"black";
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}
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RCTAssert(NO, @"Unknown UIFontWeight passed in: %f", fontWeight);
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return @"regular";
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}
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static UIFont *cachedSystemFont(CGFloat size, RCTFontWeight weight)
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{
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static NSCache<NSValue *, UIFont *> *fontCache = [NSCache new];
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struct __attribute__((__packed__)) CacheKey {
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CGFloat size;
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RCTFontWeight weight;
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};
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CacheKey key{size, weight};
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NSValue *cacheKey = [[NSValue alloc] initWithBytes:&key objCType:@encode(CacheKey)];
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UIFont *font = [fontCache objectForKey:cacheKey];
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if (!font) {
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if (defaultFontHandler) {
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NSString *fontWeightDescription = FontWeightDescriptionFromUIFontWeight(weight);
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font = defaultFontHandler(size, fontWeightDescription);
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} else {
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font = [UIFont systemFontOfSize:size weight:weight];
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}
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[fontCache setObject:font forKey:cacheKey];
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}
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return font;
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}
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// Caching wrapper around expensive +[UIFont fontNamesForFamilyName:]
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static NSArray<NSString *> *fontNamesForFamilyName(NSString *familyName)
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{
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static NSCache<NSString *, NSArray<NSString *> *> *cache;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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cache = [NSCache new];
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[NSNotificationCenter.defaultCenter
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addObserverForName:(NSNotificationName)kCTFontManagerRegisteredFontsChangedNotification
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object:nil
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queue:nil
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usingBlock:^(NSNotification *) {
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[cache removeAllObjects];
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}];
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});
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auto names = [cache objectForKey:familyName];
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if (!names) {
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names = [UIFont fontNamesForFamilyName:familyName] ?: [NSArray new];
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[cache setObject:names forKey:familyName];
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}
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return names;
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}
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@implementation RCTConvert (RCTFont)
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+ (UIFont *)UIFont:(id)json
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{
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json = [self NSDictionary:json];
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return [RCTFont updateFont:nil
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withFamily:[RCTConvert NSString:json[@"fontFamily"]]
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size:[RCTConvert NSNumber:json[@"fontSize"]]
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weight:[RCTConvert NSString:json[@"fontWeight"]]
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style:[RCTConvert NSString:json[@"fontStyle"]]
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variant:[RCTConvert NSStringArray:json[@"fontVariant"]]
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scaleMultiplier:1];
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}
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RCT_ENUM_CONVERTER(
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RCTFontWeight,
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(@{
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@"normal" : @(UIFontWeightRegular),
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@"bold" : @(UIFontWeightBold),
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@"100" : @(UIFontWeightUltraLight),
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@"200" : @(UIFontWeightThin),
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@"300" : @(UIFontWeightLight),
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@"400" : @(UIFontWeightRegular),
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@"500" : @(UIFontWeightMedium),
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@"600" : @(UIFontWeightSemibold),
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@"700" : @(UIFontWeightBold),
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@"800" : @(UIFontWeightHeavy),
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@"900" : @(UIFontWeightBlack),
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}),
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UIFontWeightRegular,
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doubleValue)
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typedef BOOL RCTFontStyle;
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RCT_ENUM_CONVERTER(
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RCTFontStyle,
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(@{
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@"normal" : @NO,
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@"italic" : @YES,
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@"oblique" : @YES,
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}),
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NO,
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boolValue)
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typedef NSDictionary RCTFontVariantDescriptor;
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+ (RCTFontVariantDescriptor *)RCTFontVariantDescriptor:(id)json
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{
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static NSDictionary *mapping;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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mapping = @{
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@"small-caps" : @{
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UIFontFeatureTypeIdentifierKey : @(kLowerCaseType),
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UIFontFeatureSelectorIdentifierKey : @(kLowerCaseSmallCapsSelector),
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},
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@"oldstyle-nums" : @{
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UIFontFeatureTypeIdentifierKey : @(kNumberCaseType),
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UIFontFeatureSelectorIdentifierKey : @(kLowerCaseNumbersSelector),
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},
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@"lining-nums" : @{
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UIFontFeatureTypeIdentifierKey : @(kNumberCaseType),
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UIFontFeatureSelectorIdentifierKey : @(kUpperCaseNumbersSelector),
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},
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@"tabular-nums" : @{
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UIFontFeatureTypeIdentifierKey : @(kNumberSpacingType),
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UIFontFeatureSelectorIdentifierKey : @(kMonospacedNumbersSelector),
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},
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@"proportional-nums" : @{
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UIFontFeatureTypeIdentifierKey : @(kNumberSpacingType),
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UIFontFeatureSelectorIdentifierKey : @(kProportionalNumbersSelector),
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},
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@"stylistic-one" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltOneOnSelector),
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},
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@"stylistic-two" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltTwoOnSelector),
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},
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@"stylistic-three" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltThreeOnSelector),
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},
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@"stylistic-four" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltFourOnSelector),
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},
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@"stylistic-five" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltFiveOnSelector),
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},
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@"stylistic-six" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltSixOnSelector),
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},
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@"stylistic-seven" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltSevenOnSelector),
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},
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@"stylistic-eight" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltEightOnSelector),
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},
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@"stylistic-nine" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltNineOnSelector),
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},
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@"stylistic-ten" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltTenOnSelector),
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},
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@"stylistic-eleven" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltElevenOnSelector),
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},
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@"stylistic-twelve" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltTwelveOnSelector),
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},
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@"stylistic-thirteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltThirteenOnSelector),
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},
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@"stylistic-fourteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltFourteenOnSelector),
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},
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@"stylistic-fifteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltFifteenOnSelector),
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},
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@"stylistic-sixteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltSixteenOnSelector),
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},
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@"stylistic-seventeen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltSeventeenOnSelector),
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},
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@"stylistic-eighteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltEighteenOnSelector),
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},
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@"stylistic-nineteen" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltNineteenOnSelector),
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},
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@"stylistic-twenty" : @{
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UIFontFeatureTypeIdentifierKey : @(kStylisticAlternativesType),
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UIFontFeatureSelectorIdentifierKey : @(kStylisticAltTwentyOnSelector),
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}
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};
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});
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RCTFontVariantDescriptor *value = mapping[json];
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if (RCT_DEBUG && !value && [json description].length > 0) {
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RCTLogInfo(
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@"Invalid RCTFontVariantDescriptor '%@'. should be one of: %@",
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json,
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[[mapping allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]);
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}
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return value;
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}
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RCT_ARRAY_CONVERTER(RCTFontVariantDescriptor)
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@end
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@implementation RCTFont
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|
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+ (UIFont *)updateFont:(UIFont *)font
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withFamily:(NSString *)family
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size:(NSNumber *)size
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weight:(NSString *)weight
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style:(NSString *)style
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variant:(NSArray<RCTFontVariantDescriptor *> *)variant
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scaleMultiplier:(CGFloat)scaleMultiplier
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{
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// Defaults
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static NSString *defaultFontFamily;
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static dispatch_once_t onceToken;
|
||
|
|
dispatch_once(&onceToken, ^{
|
||
|
|
defaultFontFamily = [UIFont systemFontOfSize:14].familyName;
|
||
|
|
});
|
||
|
|
const RCTFontWeight defaultFontWeight = UIFontWeightRegular;
|
||
|
|
const CGFloat defaultFontSize = 14;
|
||
|
|
|
||
|
|
// Initialize properties to defaults
|
||
|
|
CGFloat fontSize = defaultFontSize;
|
||
|
|
RCTFontWeight fontWeight = defaultFontWeight;
|
||
|
|
NSString *familyName = defaultFontFamily;
|
||
|
|
BOOL isItalic = NO;
|
||
|
|
BOOL isCondensed = NO;
|
||
|
|
|
||
|
|
if (font) {
|
||
|
|
familyName = font.familyName ?: defaultFontFamily;
|
||
|
|
fontSize = font.pointSize ?: defaultFontSize;
|
||
|
|
fontWeight = weightOfFont(font);
|
||
|
|
isItalic = isItalicFont(font);
|
||
|
|
isCondensed = isCondensedFont(font);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get font attributes
|
||
|
|
fontSize = [RCTConvert CGFloat:size] ?: fontSize;
|
||
|
|
if (scaleMultiplier > 0.0 && scaleMultiplier != 1.0) {
|
||
|
|
fontSize = round(fontSize * scaleMultiplier);
|
||
|
|
}
|
||
|
|
familyName = [RCTConvert NSString:family] ?: familyName;
|
||
|
|
isItalic = style ? [RCTConvert RCTFontStyle:style] : isItalic;
|
||
|
|
fontWeight = weight ? [RCTConvert RCTFontWeight:weight] : fontWeight;
|
||
|
|
|
||
|
|
BOOL didFindFont = NO;
|
||
|
|
|
||
|
|
// Handle system font as special case. This ensures that we preserve
|
||
|
|
// the specific metrics of the standard system font as closely as possible.
|
||
|
|
if ([familyName isEqual:defaultFontFamily] || [familyName isEqualToString:@"System"]) {
|
||
|
|
font = cachedSystemFont(fontSize, fontWeight);
|
||
|
|
if (font) {
|
||
|
|
didFindFont = YES;
|
||
|
|
|
||
|
|
if (isItalic || isCondensed) {
|
||
|
|
UIFontDescriptor *fontDescriptor = [font fontDescriptor];
|
||
|
|
UIFontDescriptorSymbolicTraits symbolicTraits = fontDescriptor.symbolicTraits;
|
||
|
|
if (isItalic) {
|
||
|
|
symbolicTraits |= UIFontDescriptorTraitItalic;
|
||
|
|
}
|
||
|
|
if (isCondensed) {
|
||
|
|
symbolicTraits |= UIFontDescriptorTraitCondensed;
|
||
|
|
}
|
||
|
|
fontDescriptor = [fontDescriptor fontDescriptorWithSymbolicTraits:symbolicTraits];
|
||
|
|
font = [UIFont fontWithDescriptor:fontDescriptor size:fontSize];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Gracefully handle being given a font name rather than font family, for
|
||
|
|
// example: "Helvetica Light Oblique" rather than just "Helvetica".
|
||
|
|
if (!didFindFont && fontNamesForFamilyName(familyName).count == 0) {
|
||
|
|
font = [UIFont fontWithName:familyName size:fontSize];
|
||
|
|
if (font) {
|
||
|
|
// It's actually a font name, not a font family name,
|
||
|
|
// but we'll do what was meant, not what was said.
|
||
|
|
familyName = font.familyName;
|
||
|
|
fontWeight = weight ? fontWeight : weightOfFont(font);
|
||
|
|
isItalic = style ? isItalic : isItalicFont(font);
|
||
|
|
isCondensed = isCondensedFont(font);
|
||
|
|
} else {
|
||
|
|
// Not a valid font or family
|
||
|
|
RCTLogInfo(@"Unrecognized font family '%@'", familyName);
|
||
|
|
if ([UIFont respondsToSelector:@selector(systemFontOfSize:weight:)]) {
|
||
|
|
font = [UIFont systemFontOfSize:fontSize weight:fontWeight];
|
||
|
|
} else if (fontWeight > UIFontWeightRegular) {
|
||
|
|
font = [UIFont boldSystemFontOfSize:fontSize];
|
||
|
|
} else {
|
||
|
|
font = [UIFont systemFontOfSize:fontSize];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
NSArray<NSString *> *names = fontNamesForFamilyName(familyName);
|
||
|
|
if (!didFindFont) {
|
||
|
|
// Get the closest font that matches the given weight for the fontFamily
|
||
|
|
CGFloat closestWeight = INFINITY;
|
||
|
|
for (NSString *name in names) {
|
||
|
|
UIFont *match = [UIFont fontWithName:name size:fontSize];
|
||
|
|
if (isItalic == isItalicFont(match) && isCondensed == isCondensedFont(match)) {
|
||
|
|
CGFloat testWeight = weightOfFont(match);
|
||
|
|
if (ABS(testWeight - fontWeight) < ABS(closestWeight - fontWeight)) {
|
||
|
|
font = match;
|
||
|
|
closestWeight = testWeight;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If we still don't have a match at least return the first font in the fontFamily
|
||
|
|
// This is to support built-in font Zapfino and other custom single font families like Impact
|
||
|
|
if (!font && names.count > 0) {
|
||
|
|
font = [UIFont fontWithName:names[0] size:fontSize];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Apply font variants to font object
|
||
|
|
if (variant) {
|
||
|
|
NSArray *fontFeatures = [RCTConvert RCTFontVariantDescriptorArray:variant];
|
||
|
|
UIFontDescriptor *fontDescriptor = [font.fontDescriptor
|
||
|
|
fontDescriptorByAddingAttributes:@{UIFontDescriptorFeatureSettingsAttribute : fontFeatures}];
|
||
|
|
font = [UIFont fontWithDescriptor:fontDescriptor size:fontSize];
|
||
|
|
}
|
||
|
|
|
||
|
|
return font;
|
||
|
|
}
|
||
|
|
|
||
|
|
+ (UIFont *)updateFont:(UIFont *)font withFamily:(NSString *)family
|
||
|
|
{
|
||
|
|
return [self updateFont:font withFamily:family size:nil weight:nil style:nil variant:nil scaleMultiplier:1];
|
||
|
|
}
|
||
|
|
|
||
|
|
+ (UIFont *)updateFont:(UIFont *)font withSize:(NSNumber *)size
|
||
|
|
{
|
||
|
|
return [self updateFont:font withFamily:nil size:size weight:nil style:nil variant:nil scaleMultiplier:1];
|
||
|
|
}
|
||
|
|
|
||
|
|
+ (UIFont *)updateFont:(UIFont *)font withWeight:(NSString *)weight
|
||
|
|
{
|
||
|
|
return [self updateFont:font withFamily:nil size:nil weight:weight style:nil variant:nil scaleMultiplier:1];
|
||
|
|
}
|
||
|
|
|
||
|
|
+ (UIFont *)updateFont:(UIFont *)font withStyle:(NSString *)style
|
||
|
|
{
|
||
|
|
return [self updateFont:font withFamily:nil size:nil weight:nil style:style variant:nil scaleMultiplier:1];
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|