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Fix backticks not removed when entering diacritics using option key commands on iOS #182

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Fix backticks not removed when entering diacritics using option key commands on iOS #182

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5382e29
Make it work
tomekzaw Feb 12, 2024
105b607
Restore underline
tomekzaw Feb 12, 2024
31cbdb2
Found a fix
tomekzaw Feb 13, 2024
dbaed87
Uncomment some more code
tomekzaw Feb 13, 2024
642651c
Update comment
tomekzaw Feb 13, 2024
f755217
Merge branch 'main' into @tomekzaw/fix-ios-option-key-diacritics
tomekzaw Feb 22, 2024
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9 changes: 7 additions & 2 deletions ios/RCTMarkdownUtils.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
#import "react_native_assert.h"
#import <React/RCTAssert.h>
#import <React/RCTFont.h>
#import <React/RCTTextAttributes.h>
#import <JavaScriptCore/JavaScriptCore.h>

@implementation RCTMarkdownUtils {
Expand Down Expand Up @@ -47,13 +48,17 @@ - (NSAttributedString *)parseMarkdown:(nullable NSAttributedString *)input
JSValue *result = [function callWithArguments:@[inputString]];
NSArray *ranges = [result toArray];

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:inputString attributes:_backedTextInputView.defaultTextAttributes];
NSMutableAttributedString *attributedString = [input mutableCopy];
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I had to use mutableCopy here because creating NSMutableAttributedString from NSString loses the information about diacritics context.

[attributedString beginEditing];

NSMutableDictionary<NSAttributedStringKey, id> *attributes = [_backedTextInputView.defaultTextAttributes mutableCopy];
[attributes removeObjectForKey:RCTTextAttributesTagAttributeName];
[attributedString addAttributes:attributes range:NSMakeRange(0, attributedString.length)];
Comment on lines +54 to +56
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Because of the above change, now the attributed string also contains previous styling so I need to apply default text attributes in order to reset it.

For some reason, restoring RCTTextAttributesTagAttributeName attribute also breaks the diacritics context so I need to make sure it is not applied. This can be done either by removing it from the dictionary or calling [NSAttributedString removeAttribute] later on.

This attribute is also removed by React Native itself: https://github.com/facebook/react-native/blob/f9a5b30e5a805061416123d037351e5c03860756/packages/react-native/Libraries/Text/TextInput/RCTBaseTextInputView.mm#L175-L179


// If the attributed string ends with underlined text, blurring the single-line input imprints the underline style across the whole string.
// It looks like a bug in iOS, as there is no underline style to be found in the attributed string, especially after formatting.
// This is a workaround that applies the NSUnderlineStyleNone to the string before iterating over ranges which resolves this problem.
[attributedString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleNone] range:NSMakeRange(0, attributedString.length)];
[attributedString removeAttribute:NSUnderlineStyleAttributeName range:NSMakeRange(0, attributedString.length)];

_blockquoteRanges = [NSMutableArray new];

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