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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/react-native/Libraries/Text/Text
Просмотр файла: RCTTextView.mm
/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import <React/RCTTextView.h>
#import <MobileCoreServices/UTCoreTypes.h>
#import <React/RCTUtils.h>
#import <React/UIView+React.h>
#import <React/RCTTextShadowView.h>
#import <QuartzCore/QuartzCore.h>
@interface RCTTextView () <UIEditMenuInteractionDelegate>
@property (nonatomic, nullable) UIEditMenuInteraction *editMenuInteraction API_AVAILABLE(ios(16.0));
@end
@implementation RCTTextView {
CAShapeLayer *_highlightLayer;
UILongPressGestureRecognizer *_longPressGestureRecognizer;
NSArray<UIView *> *_Nullable _descendantViews;
NSTextStorage *_Nullable _textStorage;
CGRect _contentFrame;
}
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
self.isAccessibilityElement = YES;
self.accessibilityTraits |= UIAccessibilityTraitStaticText;
self.opaque = NO;
self.contentMode = UIViewContentModeRedraw;
}
return self;
}
- (NSString *)description
{
NSString *stringToAppend = [NSString stringWithFormat:@" reactTag: %@; text: %@", self.reactTag, _textStorage.string];
return [[super description] stringByAppendingString:stringToAppend];
}
- (void)setSelectable:(BOOL)selectable
{
if (_selectable == selectable) {
return;
}
_selectable = selectable;
if (_selectable) {
[self enableContextMenu];
} else {
[self disableContextMenu];
}
}
- (void)reactSetFrame:(CGRect)frame
{
// Text looks super weird if its frame is animated.
// This disables the frame animation, without affecting opacity, etc.
[UIView performWithoutAnimation:^{
[super reactSetFrame:frame];
}];
}
- (void)didUpdateReactSubviews
{
// Do nothing, as subviews are managed by `setTextStorage:` method
}
- (void)setTextStorage:(NSTextStorage *)textStorage
contentFrame:(CGRect)contentFrame
descendantViews:(NSArray<UIView *> *)descendantViews
{
_textStorage = textStorage;
_contentFrame = contentFrame;
// FIXME: Optimize this.
for (UIView *view in _descendantViews) {
[view removeFromSuperview];
}
_descendantViews = descendantViews;
for (UIView *view in descendantViews) {
[self addSubview:view];
}
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect
{
[super drawRect:rect];
if (!_textStorage) {
return;
}
NSLayoutManager *layoutManager = _textStorage.layoutManagers.firstObject;
NSTextContainer *textContainer = layoutManager.textContainers.firstObject;
#if TARGET_OS_MACCATALYST
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
// NSLayoutManager tries to draw text with sub-pixel anti-aliasing by default on
// macOS, but rendering SPAA onto a transparent background produces poor results.
// CATextLayer disables font smoothing by default now on macOS; we follow suit.
CGContextSetShouldSmoothFonts(context, NO);
#endif
NSRange glyphRange = [layoutManager glyphRangeForTextContainer:textContainer];
[layoutManager drawBackgroundForGlyphRange:glyphRange atPoint:_contentFrame.origin];
[layoutManager drawGlyphsForGlyphRange:glyphRange atPoint:_contentFrame.origin];
__block UIBezierPath *highlightPath = nil;
NSRange characterRange = [layoutManager characterRangeForGlyphRange:glyphRange actualGlyphRange:NULL];
[_textStorage
enumerateAttribute:RCTTextAttributesIsHighlightedAttributeName
inRange:characterRange
options:0
usingBlock:^(NSNumber *value, NSRange range, __unused BOOL *stop) {
if (!value.boolValue) {
return;
}
[layoutManager
enumerateEnclosingRectsForGlyphRange:range
withinSelectedGlyphRange:range
inTextContainer:textContainer
usingBlock:^(CGRect enclosingRect, __unused BOOL *anotherStop) {
UIBezierPath *path = [UIBezierPath
bezierPathWithRoundedRect:CGRectInset(enclosingRect, -2, -2)
cornerRadius:2];
if (highlightPath) {
[highlightPath appendPath:path];
} else {
highlightPath = path;
}
}];
}];
if (highlightPath) {
if (!_highlightLayer) {
_highlightLayer = [CAShapeLayer layer];
_highlightLayer.fillColor = [UIColor colorWithWhite:0 alpha:0.25].CGColor;
[self.layer addSublayer:_highlightLayer];
}
_highlightLayer.position = _contentFrame.origin;
_highlightLayer.path = highlightPath.CGPath;
} else {
[_highlightLayer removeFromSuperlayer];
_highlightLayer = nil;
}
#if TARGET_OS_MACCATALYST
CGContextRestoreGState(context);
#endif
}
- (NSNumber *)reactTagAtPoint:(CGPoint)point
{
NSNumber *reactTag = self.reactTag;
CGFloat fraction;
NSLayoutManager *layoutManager = _textStorage.layoutManagers.firstObject;
NSTextContainer *textContainer = layoutManager.textContainers.firstObject;
NSUInteger characterIndex = [layoutManager characterIndexForPoint:point
inTextContainer:textContainer
fractionOfDistanceBetweenInsertionPoints:&fraction];
// If the point is not before (fraction == 0.0) the first character and not
// after (fraction == 1.0) the last character, then the attribute is valid.
if (_textStorage.length > 0 && (fraction > 0 || characterIndex > 0) &&
(fraction < 1 || characterIndex < _textStorage.length - 1)) {
reactTag = [_textStorage attribute:RCTTextAttributesTagAttributeName atIndex:characterIndex effectiveRange:NULL];
}
return reactTag;
}
- (void)didMoveToWindow
{
[super didMoveToWindow];
if (!self.window) {
self.layer.contents = nil;
if (_highlightLayer) {
[_highlightLayer removeFromSuperlayer];
_highlightLayer = nil;
}
} else if (_textStorage) {
[self setNeedsDisplay];
}
}
#pragma mark - Accessibility
- (NSString *)accessibilityLabel
{
NSString *superAccessibilityLabel = [super accessibilityLabel];
if (superAccessibilityLabel) {
return superAccessibilityLabel;
}
return _textStorage.string;
}
#pragma mark - Context Menu
- (void)enableContextMenu
{
_longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self
action:@selector(handleLongPress:)];
if (@available(iOS 16.0, *)) {
_editMenuInteraction = [[UIEditMenuInteraction alloc] initWithDelegate:self];
[self addInteraction:_editMenuInteraction];
}
[self addGestureRecognizer:_longPressGestureRecognizer];
}
- (void)disableContextMenu
{
[self removeGestureRecognizer:_longPressGestureRecognizer];
if (@available(iOS 16.0, *)) {
[self removeInteraction:_editMenuInteraction];
_editMenuInteraction = nil;
}
_longPressGestureRecognizer = nil;
}
- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture
{
if (@available(iOS 16.0, macCatalyst 16.0, *)) {
CGPoint location = [gesture locationInView:self];
UIEditMenuConfiguration *config = [UIEditMenuConfiguration configurationWithIdentifier:nil sourcePoint:location];
if (_editMenuInteraction) {
[_editMenuInteraction presentEditMenuWithConfiguration:config];
}
} else {
UIMenuController *menuController = [UIMenuController sharedMenuController];
if (menuController.isMenuVisible) {
return;
}
[menuController showMenuFromView:self rect:self.bounds];
}
}
- (BOOL)canBecomeFirstResponder
{
return _selectable;
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (_selectable && action == @selector(copy:)) {
return YES;
}
return [self.nextResponder canPerformAction:action withSender:sender];
}
- (void)copy:(id)sender
{
NSAttributedString *attributedText = _textStorage;
NSMutableDictionary *item = [NSMutableDictionary new];
NSData *rtf = [attributedText dataFromRange:NSMakeRange(0, attributedText.length)
documentAttributes:@{NSDocumentTypeDocumentAttribute : NSRTFDTextDocumentType}
error:nil];
if (rtf) {
[item setObject:rtf forKey:(id)kUTTypeFlatRTFD];
}
[item setObject:attributedText.string forKey:(id)kUTTypeUTF8PlainText];
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.items = @[ item ];
}
@end
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