158 lines
4.9 KiB
Objective-C
158 lines
4.9 KiB
Objective-C
/*
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* Copyright (c) Facebook, Inc. and its 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 <React/RCTBaseTextShadowView.h>
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#import <React/RCTShadowView+Layout.h>
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#import <React/RCTRawTextShadowView.h>
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#import <React/RCTVirtualTextShadowView.h>
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NSString *const RCTBaseTextShadowViewEmbeddedShadowViewAttributeName = @"RCTBaseTextShadowViewEmbeddedShadowViewAttributeName";
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static void RCTInlineViewYogaNodeDirtied(YGNodeRef node)
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{
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// An inline view (a view nested inside of a text node) does not have a parent
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// in the Yoga tree. Consequently, we have to manually propagate the inline
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// view's dirty signal up through the text nodes. At some point, it'll reach
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// the outermost text node which has a Yoga node and then Yoga will take over
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// the dirty signal propagation.
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RCTShadowView *inlineView = (__bridge RCTShadowView *)YGNodeGetContext(node);
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RCTBaseTextShadowView *baseTextShadowView =
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(RCTBaseTextShadowView *)inlineView.reactSuperview;
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[baseTextShadowView dirtyLayout];
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}
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@implementation RCTBaseTextShadowView
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- (instancetype)init
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{
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if (self = [super init]) {
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_textAttributes = [RCTTextAttributes new];
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}
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return self;
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}
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- (void)setReactTag:(NSNumber *)reactTag
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{
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[super setReactTag:reactTag];
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_textAttributes.tag = reactTag;
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}
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#pragma mark - Life Cycle
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- (void)insertReactSubview:(RCTShadowView *)subview atIndex:(NSInteger)index
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{
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[super insertReactSubview:subview atIndex:index];
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[self dirtyLayout];
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if (![subview isKindOfClass:[RCTVirtualTextShadowView class]]) {
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YGNodeSetDirtiedFunc(subview.yogaNode, RCTInlineViewYogaNodeDirtied);
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}
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}
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- (void)removeReactSubview:(RCTShadowView *)subview
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{
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if (![subview isKindOfClass:[RCTVirtualTextShadowView class]]) {
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YGNodeSetDirtiedFunc(subview.yogaNode, NULL);
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}
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[self dirtyLayout];
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[super removeReactSubview:subview];
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}
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#pragma mark - attributedString
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- (NSAttributedString *)attributedTextWithBaseTextAttributes:(nullable RCTTextAttributes *)baseTextAttributes
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{
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RCTTextAttributes *textAttributes;
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if (baseTextAttributes) {
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textAttributes = [baseTextAttributes copy];
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[textAttributes applyTextAttributes:self.textAttributes];
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} else {
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textAttributes = [self.textAttributes copy];
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}
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if (cachedAttributedText && [cachedTextAttributes isEqual:textAttributes]) {
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return cachedAttributedText;
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}
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NSMutableAttributedString *attributedText = [NSMutableAttributedString new];
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[attributedText beginEditing];
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for (RCTShadowView *shadowView in self.reactSubviews) {
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// Special Case: RCTRawTextShadowView
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if ([shadowView isKindOfClass:[RCTRawTextShadowView class]]) {
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RCTRawTextShadowView *rawTextShadowView = (RCTRawTextShadowView *)shadowView;
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NSString *text = rawTextShadowView.text;
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if (text) {
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NSAttributedString *rawTextAttributedString =
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[[NSAttributedString alloc] initWithString:[textAttributes applyTextAttributesToText:text]
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attributes:textAttributes.effectiveTextAttributes];
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[attributedText appendAttributedString:rawTextAttributedString];
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}
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continue;
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}
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// Special Case: RCTBaseTextShadowView
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if ([shadowView isKindOfClass:[RCTBaseTextShadowView class]]) {
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RCTBaseTextShadowView *baseTextShadowView = (RCTBaseTextShadowView *)shadowView;
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NSAttributedString *baseTextAttributedString =
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[baseTextShadowView attributedTextWithBaseTextAttributes:textAttributes];
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[attributedText appendAttributedString:baseTextAttributedString];
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continue;
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}
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// Generic Case: Any RCTShadowView
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NSTextAttachment *attachment = [NSTextAttachment new];
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NSMutableAttributedString *embeddedShadowViewAttributedString = [NSMutableAttributedString new];
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[embeddedShadowViewAttributedString beginEditing];
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[embeddedShadowViewAttributedString appendAttributedString:[NSAttributedString attributedStringWithAttachment:attachment]];
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[embeddedShadowViewAttributedString addAttribute:RCTBaseTextShadowViewEmbeddedShadowViewAttributeName
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value:shadowView
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range:(NSRange){0, embeddedShadowViewAttributedString.length}];
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[embeddedShadowViewAttributedString endEditing];
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[attributedText appendAttributedString:embeddedShadowViewAttributedString];
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}
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[attributedText endEditing];
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[self clearLayout];
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cachedAttributedText = [attributedText copy];
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cachedTextAttributes = textAttributes;
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return cachedAttributedText;
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}
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- (void)dirtyLayout
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{
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[super dirtyLayout];
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cachedAttributedText = nil;
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cachedTextAttributes = nil;
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}
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- (void)didUpdateReactSubviews
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{
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[super didUpdateReactSubviews];
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[self dirtyLayout];
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}
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- (void)didSetProps:(NSArray<NSString *> *)changedProps
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{
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[super didSetProps:changedProps];
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[self dirtyLayout];
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}
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@end
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