react-native/Libraries/Text/RCTTextManager.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTTextManager.h"
#import <yoga/Yoga.h>
#import <React/RCTAccessibilityManager.h>
#import <React/RCTAssert.h>
#import <React/RCTConvert.h>
#import <React/RCTLog.h>
#import <React/UIView+React.h>
#import "RCTShadowRawText.h"
#import "RCTShadowText.h"
#import "RCTText.h"
#import "RCTTextView.h"
static void collectDirtyNonTextDescendants(RCTShadowText *shadowView, NSMutableArray *nonTextDescendants) {
for (RCTShadowView *child in shadowView.reactSubviews) {
if ([child isKindOfClass:[RCTShadowText class]]) {
collectDirtyNonTextDescendants((RCTShadowText *)child, nonTextDescendants);
} else if ([child isKindOfClass:[RCTShadowRawText class]]) {
// no-op
} else if ([child isTextDirty]) {
[nonTextDescendants addObject:child];
}
}
}
@interface RCTShadowText (Private)
- (NSTextStorage *)buildTextStorageForWidth:(CGFloat)width widthMode:(YGMeasureMode)widthMode;
@end
@implementation RCTTextManager
RCT_EXPORT_MODULE()
- (UIView *)view
{
return [RCTText new];
}
- (RCTShadowView *)shadowView
{
return [RCTShadowText new];
}
#pragma mark - Shadow properties
RCT_EXPORT_SHADOW_PROPERTY(color, UIColor)
RCT_EXPORT_SHADOW_PROPERTY(fontFamily, NSString)
RCT_EXPORT_SHADOW_PROPERTY(fontSize, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(fontWeight, NSString)
RCT_EXPORT_SHADOW_PROPERTY(fontStyle, NSString)
RCT_EXPORT_SHADOW_PROPERTY(fontVariant, NSArray)
RCT_EXPORT_SHADOW_PROPERTY(isHighlighted, BOOL)
RCT_EXPORT_SHADOW_PROPERTY(letterSpacing, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(lineHeight, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(numberOfLines, NSUInteger)
RCT_EXPORT_SHADOW_PROPERTY(ellipsizeMode, NSLineBreakMode)
RCT_EXPORT_SHADOW_PROPERTY(textAlign, NSTextAlignment)
RCT_EXPORT_SHADOW_PROPERTY(textDecorationStyle, NSUnderlineStyle)
RCT_EXPORT_SHADOW_PROPERTY(textDecorationColor, UIColor)
RCT_EXPORT_SHADOW_PROPERTY(textDecorationLine, RCTTextDecorationLineType)
RCT_EXPORT_SHADOW_PROPERTY(writingDirection, NSWritingDirection)
RCT_EXPORT_SHADOW_PROPERTY(allowFontScaling, BOOL)
RCT_EXPORT_SHADOW_PROPERTY(opacity, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(textShadowOffset, CGSize)
RCT_EXPORT_SHADOW_PROPERTY(textShadowRadius, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(textShadowColor, UIColor)
RCT_EXPORT_SHADOW_PROPERTY(adjustsFontSizeToFit, BOOL)
RCT_EXPORT_SHADOW_PROPERTY(minimumFontScale, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(selectable, BOOL)
- (RCTViewManagerUIBlock)uiBlockToAmendWithShadowViewRegistry:(NSDictionary<NSNumber *, RCTShadowView *> *)shadowViewRegistry
{
for (RCTShadowView *rootView in shadowViewRegistry.allValues) {
if (![rootView isReactRootView]) {
// This isn't a root view
continue;
}
if (![rootView isTextDirty]) {
// No text processing to be done
continue;
}
NSMutableArray<RCTShadowView *> *queue = [NSMutableArray arrayWithObject:rootView];
for (NSInteger i = 0; i < queue.count; i++) {
RCTShadowView *shadowView = queue[i];
RCTAssert([shadowView isTextDirty], @"Don't process any nodes that don't have dirty text");
if ([shadowView isKindOfClass:[RCTShadowText class]]) {
((RCTShadowText *)shadowView).fontSizeMultiplier = self.bridge.accessibilityManager.multiplier;
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[(RCTShadowText *)shadowView recomputeText];
collectDirtyNonTextDescendants((RCTShadowText *)shadowView, queue);
} else if ([shadowView isKindOfClass:[RCTShadowRawText class]]) {
RCTLogError(@"Raw text cannot be used outside of a <Text> tag. Not rendering string: '%@'",
[(RCTShadowRawText *)shadowView text]);
} else {
for (RCTShadowView *child in [shadowView reactSubviews]) {
if ([child isTextDirty]) {
[queue addObject:child];
}
}
}
[shadowView setTextComputed];
}
}
return nil;
}
- (RCTViewManagerUIBlock)uiBlockToAmendWithShadowView:(RCTShadowText *)shadowView
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{
NSNumber *reactTag = shadowView.reactTag;
UIEdgeInsets padding = shadowView.paddingAsInsets;
return ^(RCTUIManager *uiManager, NSDictionary<NSNumber *, RCTText *> *viewRegistry) {
RCTText *text = viewRegistry[reactTag];
text.contentInset = padding;
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};
}
@end