react-native/Libraries/Text/RCTTextManager.m

189 lines
6.5 KiB
Objective-C

/**
* 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 "Layout.h"
#import "RCTAccessibilityManager.h"
#import "RCTAssert.h"
#import "RCTConvert.h"
#import "RCTLog.h"
#import "RCTShadowRawText.h"
#import "RCTShadowText.h"
#import "RCTText.h"
#import "RCTTextView.h"
#import "UIView+React.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:(css_measure_mode_t)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(isHighlighted, BOOL)
RCT_EXPORT_SHADOW_PROPERTY(letterSpacing, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(lineHeight, CGFloat)
RCT_EXPORT_SHADOW_PROPERTY(numberOfLines, NSUInteger)
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)
- (RCTViewManagerUIBlock)uiBlockToAmendWithShadowViewRegistry:(NSDictionary<NSNumber *, RCTShadowView *> *)shadowViewRegistry
{
NSMutableSet *textViewTagsToUpdate = [NSMutableSet new];
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;
[(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 {
NSNumber *reactTag = shadowView.reactTag;
// This isn't pretty, but hopefully it's temporary
// the problem is, there's no easy way (besides the viewName)
// to tell from the shadowView if the view is an RKTextView
if ([shadowView.viewName hasSuffix:@"TextView"]) {
// Add to textViewTagsToUpdate only if has a RCTShadowText subview
for (RCTShadowView *subview in shadowView.reactSubviews) {
if ([subview isKindOfClass:[RCTShadowText class]]) {
[textViewTagsToUpdate addObject:reactTag];
break;
}
}
}
for (RCTShadowView *child in [shadowView reactSubviews]) {
if ([child isTextDirty]) {
[queue addObject:child];
}
}
}
[shadowView setTextComputed];
}
}
/**
* NOTE: this logic is included to support rich text editing inside multiline
* `<TextInput>` controls. It is required in order to ensure that the
* textStorage (aka attributed string) is copied over from the RCTShadowText
* to the RCTText view in time to be used to update the editable text content.
*/
if (textViewTagsToUpdate.count) {
NSMutableArray<RCTViewManagerUIBlock> *uiBlocks = [NSMutableArray new];
for (NSNumber *reactTag in textViewTagsToUpdate) {
RCTShadowView *shadowTextView = shadowViewRegistry[reactTag];
RCTShadowText *shadowText;
for (RCTShadowText *subview in shadowTextView.reactSubviews) {
if ([subview isKindOfClass:[RCTShadowText class]]) {
shadowText = subview;
break;
}
}
UIEdgeInsets padding = shadowText.paddingAsInsets;
CGFloat width = shadowText.frame.size.width - (padding.left + padding.right);
NSTextStorage *textStorage = [shadowText buildTextStorageForWidth:width widthMode:CSS_MEASURE_MODE_EXACTLY];
[uiBlocks addObject:^(RCTUIManager *uiManager, NSDictionary<NSNumber *, RCTTextView *> *viewRegistry) {
RCTTextView *textView = viewRegistry[reactTag];
RCTText *text;
for (RCTText *subview in textView.reactSubviews) {
if ([subview isKindOfClass:[RCTText class]]) {
text = subview;
break;
}
}
text.textStorage = textStorage;
[textView performTextUpdate];
}];
}
return ^(RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
for (RCTViewManagerUIBlock uiBlock in uiBlocks) {
uiBlock(uiManager, viewRegistry);
}
};
} else {
return nil;
}
}
- (RCTViewManagerUIBlock)uiBlockToAmendWithShadowView:(RCTShadowText *)shadowView
{
NSNumber *reactTag = shadowView.reactTag;
UIEdgeInsets padding = shadowView.paddingAsInsets;
return ^(RCTUIManager *uiManager, NSDictionary<NSNumber *, RCTText *> *viewRegistry) {
RCTText *text = viewRegistry[reactTag];
text.contentInset = padding;
};
}
@end