feat: add support for codeblock on iOS

ios/EnrichedTextInputView.h

@@ -18,13 +18,16 @@ NS_ASSUME_NONNULL_BEGIN
   @public InputParser *parser;
   @public NSMutableDictionary<NSAttributedStringKey, id> *defaultTypingAttributes;
   @public NSDictionary<NSNumber *, id<BaseStyleProtocol>> *stylesDict;
+  NSDictionary<NSNumber *, NSArray<NSNumber *> *> *conflictingStyles;
+  NSDictionary<NSNumber *, NSArray<NSNumber *> *> *blockingStyles;
   @public BOOL blockEmitting;
 }
 - (CGSize)measureSize:(CGFloat)maxWidth;
 - (void)emitOnLinkDetectedEvent:(NSString *)text url:(NSString *)url range:(NSRange)range;
 - (void)emitOnMentionEvent:(NSString *)indicator text:(nullable NSString *)text;
 - (void)anyTextMayHaveBeenModified;
 - (BOOL)handleStyleBlocksAndConflicts:(StyleType)type range:(NSRange)range;
+- (NSArray<NSNumber *> *)getPresentStyleTypesFrom:(NSArray<NSNumber *> *)types range:(NSRange)range;
 @end
 
 NS_ASSUME_NONNULL_END

ios/EnrichedTextInputView.mm

@@ -26,8 +26,6 @@ @implementation EnrichedTextInputView {
   EnrichedTextInputViewShadowNode::ConcreteState::Shared _state;
   int _componentViewHeightUpdateCounter;
   NSMutableSet<NSNumber *> *_activeStyles;
-  NSDictionary<NSNumber *, NSArray<NSNumber *> *> *_conflictingStyles;
-  NSDictionary<NSNumber *, NSArray<NSNumber *> *> *_blockingStyles;
   LinkData *_recentlyActiveLinkData;
   NSRange _recentlyActiveLinkRange;
   NSString *_recentlyEmittedString;
@@ -95,39 +93,43 @@ - (void)setDefaults {
     @([H3Style getStyleType]): [[H3Style alloc] initWithInput:self],
     @([UnorderedListStyle getStyleType]): [[UnorderedListStyle alloc] initWithInput:self],
     @([OrderedListStyle getStyleType]): [[OrderedListStyle alloc] initWithInput:self],
-    @([BlockQuoteStyle getStyleType]): [[BlockQuoteStyle alloc] initWithInput:self]
+    @([BlockQuoteStyle getStyleType]): [[BlockQuoteStyle alloc] initWithInput:self],
+    @([CodeBlockStyle getStyleType]): [[CodeBlockStyle alloc] initWithInput:self]
   };
 
-  _conflictingStyles = @{
+  conflictingStyles = @{
     @([BoldStyle getStyleType]) : @[],
     @([ItalicStyle getStyleType]) : @[],
     @([UnderlineStyle getStyleType]) : @[],
     @([StrikethroughStyle getStyleType]) : @[],
     @([InlineCodeStyle getStyleType]) : @[@([LinkStyle getStyleType]), @([MentionStyle getStyleType])],
     @([LinkStyle getStyleType]): @[@([InlineCodeStyle getStyleType]), @([LinkStyle getStyleType]), @([MentionStyle getStyleType])],
     @([MentionStyle getStyleType]): @[@([InlineCodeStyle getStyleType]), @([LinkStyle getStyleType])],
-    @([H1Style getStyleType]): @[@([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType])],
-    @([H2Style getStyleType]): @[@([H1Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType])],
-    @([H3Style getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType])],
-    @([UnorderedListStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType])],
-    @([OrderedListStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType])],
-    @([BlockQuoteStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType])]
+    @([H1Style getStyleType]): @[@([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([H2Style getStyleType]): @[@([H1Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([H3Style getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([UnorderedListStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([OrderedListStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([BlockQuoteStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([CodeBlockStyle getStyleType])],
+    @([CodeBlockStyle getStyleType]): @[@([H1Style getStyleType]), @([H2Style getStyleType]), @([H3Style getStyleType]),
+        @([BoldStyle getStyleType]), @([ItalicStyle getStyleType]), @([UnderlineStyle getStyleType]), @([StrikethroughStyle getStyleType]), @([UnorderedListStyle getStyleType]), @([OrderedListStyle getStyleType]), @([BlockQuoteStyle getStyleType]), @([InlineCodeStyle getStyleType]), @([MentionStyle getStyleType]), @([LinkStyle getStyleType])]
   };
 
-  _blockingStyles = @{
-    @([BoldStyle getStyleType]) : @[],
-    @([ItalicStyle getStyleType]) : @[],
-    @([UnderlineStyle getStyleType]) : @[],
-    @([StrikethroughStyle getStyleType]) : @[],
-    @([InlineCodeStyle getStyleType]) : @[],
-    @([LinkStyle getStyleType]): @[],
-    @([MentionStyle getStyleType]): @[],
+  blockingStyles = @{
+    @([BoldStyle getStyleType]) : @[@([CodeBlockStyle getStyleType])],
+    @([ItalicStyle getStyleType]) : @[@([CodeBlockStyle getStyleType])],
+    @([UnderlineStyle getStyleType]) : @[@([CodeBlockStyle getStyleType])],
+    @([StrikethroughStyle getStyleType]) : @[@([CodeBlockStyle getStyleType])],
+    @([InlineCodeStyle getStyleType]) : @[@([CodeBlockStyle getStyleType])],
+    @([LinkStyle getStyleType]): @[@([CodeBlockStyle getStyleType])],
+    @([MentionStyle getStyleType]): @[@([CodeBlockStyle getStyleType])],
     @([H1Style getStyleType]): @[],
     @([H2Style getStyleType]): @[],
     @([H3Style getStyleType]): @[],
     @([UnorderedListStyle getStyleType]): @[],
     @([OrderedListStyle getStyleType]): @[],
     @([BlockQuoteStyle getStyleType]): @[],
+    @([CodeBlockStyle getStyleType]): @[],
   };
 
   parser = [[InputParser alloc] initWithInput:self];
@@ -347,6 +349,25 @@ - (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &
     }
   }
 
+  if(newViewProps.htmlStyle.codeblock.color != oldViewProps.htmlStyle.codeblock.color) {
+    if(isColorMeaningful(newViewProps.htmlStyle.codeblock.color)) {
+      [newConfig setCodeBlockFgColor:RCTUIColorFromSharedColor(newViewProps.htmlStyle.codeblock.color)];
+      stylePropChanged = YES;
+    }
+  }
+
+  if(newViewProps.htmlStyle.codeblock.backgroundColor != oldViewProps.htmlStyle.codeblock.backgroundColor) {
+    if(isColorMeaningful(newViewProps.htmlStyle.codeblock.backgroundColor)) {
+      [newConfig setCodeBlockBgColor:RCTUIColorFromSharedColor(newViewProps.htmlStyle.codeblock.backgroundColor)];
+      stylePropChanged = YES;
+    }
+  }
+
+  if(newViewProps.htmlStyle.codeblock.borderRadius != oldViewProps.htmlStyle.codeblock.borderRadius) {
+    [newConfig setCodeBlockBorderRadius:newViewProps.htmlStyle.codeblock.borderRadius];
+    stylePropChanged = YES;
+  }
+
   if(newViewProps.htmlStyle.a.textDecorationLine != oldViewProps.htmlStyle.a.textDecorationLine) {
     NSString *objcString = [NSString fromCppString:newViewProps.htmlStyle.a.textDecorationLine];
     if([objcString isEqualToString:DecorationUnderline]) {
@@ -512,9 +533,8 @@ - (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &
   _emitHtml = newViewProps.isOnChangeHtmlSet;
 
   [super updateProps:props oldProps:oldProps];
-  // mandatory text and height checks
+  // run the changes callback
   [self anyTextMayHaveBeenModified];
-  [self tryUpdatingHeight];
 
   // autofocus - needs to be done at the very end
   if(isFirstMount && newViewProps.autoFocus) {
@@ -702,7 +722,7 @@ - (void)tryUpdatingActiveStyles {
         .isUnorderedList = [_activeStyles containsObject: @([UnorderedListStyle getStyleType])],
         .isOrderedList = [_activeStyles containsObject: @([OrderedListStyle getStyleType])],
         .isBlockQuote = [_activeStyles containsObject: @([BlockQuoteStyle getStyleType])],
-        .isCodeBlock = NO, // [_activeStyles containsObject: @([CodeBlockStyle getStyleType])],
+        .isCodeBlock = [_activeStyles containsObject: @([CodeBlockStyle getStyleType])],
         .isImage = NO // [_activeStyles containsObject: @([ImageStyle getStyleType]])],
       });
     }
@@ -771,6 +791,8 @@ - (void)handleCommand:(const NSString *)commandName args:(const NSArray *)args {
     [self toggleParagraphStyle:[OrderedListStyle getStyleType]];
   } else if([commandName isEqualToString:@"toggleBlockQuote"]) {
     [self toggleParagraphStyle:[BlockQuoteStyle getStyleType]];
+  } else if([commandName isEqualToString:@"toggleCodeBlock"]) {
+    [self toggleParagraphStyle:[CodeBlockStyle getStyleType]];
   }
 }
 
@@ -930,13 +952,13 @@ - (void)startMentionWithIndicator:(NSString *)indicator {
 // returns false when style shouldn't be applied and true when it can be
 - (BOOL)handleStyleBlocksAndConflicts:(StyleType)type range:(NSRange)range {
   // handle blocking styles: if any is present we do not apply the toggled style
-  NSArray<NSNumber *> *blocking = [self getPresentStyleTypesFrom: _blockingStyles[@(type)] range:range];
+  NSArray<NSNumber *> *blocking = [self getPresentStyleTypesFrom: blockingStyles[@(type)] range:range];
   if(blocking.count != 0) {
     return NO;
   }
 
   // handle conflicting styles: all of their occurences have to be removed
-  NSArray<NSNumber *> *conflicting = [self getPresentStyleTypesFrom: _conflictingStyles[@(type)] range:range];
+  NSArray<NSNumber *> *conflicting = [self getPresentStyleTypesFrom: conflictingStyles[@(type)] range:range];
   if(conflicting.count != 0) {
     for(NSNumber *style in conflicting) {
       id<BaseStyleProtocol> styleClass = stylesDict[style];
@@ -1012,6 +1034,7 @@ - (void)manageSelectionBasedChanges {
 - (void)handleWordModificationBasedChanges:(NSString*)word inRange:(NSRange)range {
   // manual links refreshing and automatic links detection handling
   LinkStyle* linkStyle = [stylesDict objectForKey:@([LinkStyle getStyleType])];
+
   if(linkStyle != nullptr) {
     // manual links need to be handled first because they can block automatic links after being refreshed
     [linkStyle handleManualLinks:word inRange:range];
@@ -1046,6 +1069,12 @@ - (void)anyTextMayHaveBeenModified {
     [bqStyle manageBlockquoteColor];
   }
 
+  // codeblock font and color management
+  CodeBlockStyle *codeBlockStyle = stylesDict[@([CodeBlockStyle getStyleType])];
+  if(codeBlockStyle != nullptr) {
+    [codeBlockStyle manageCodeBlockFontAndColor];
+  }
+
   // improper headings fix
   H1Style *h1Style = stylesDict[@([H1Style getStyleType])];
   H2Style *h2Style = stylesDict[@([H2Style getStyleType])];
@@ -1171,6 +1200,7 @@ - (bool)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range r
   UnorderedListStyle *uStyle = stylesDict[@([UnorderedListStyle getStyleType])];
   OrderedListStyle *oStyle = stylesDict[@([OrderedListStyle getStyleType])];
   BlockQuoteStyle *bqStyle = stylesDict[@([BlockQuoteStyle getStyleType])];
+  CodeBlockStyle *cbStyle = stylesDict[@([CodeBlockStyle getStyleType])];
   LinkStyle *linkStyle = stylesDict[@([LinkStyle getStyleType])];
   MentionStyle *mentionStyle = stylesDict[@([MentionStyle getStyleType])];
   H1Style *h1Style = stylesDict[@([H1Style getStyleType])];
@@ -1186,13 +1216,19 @@ - (bool)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range r
     [oStyle handleBackspaceInRange:range replacementText:text] ||
     [oStyle tryHandlingListShorcutInRange:range replacementText:text] ||
     [bqStyle handleBackspaceInRange:range replacementText:text] ||
+    [cbStyle handleBackspaceInRange:range replacementText:text] ||
     [linkStyle handleLeadingLinkReplacement:range replacementText:text] ||
     [mentionStyle handleLeadingMentionReplacement:range replacementText:text] ||
     [h1Style handleNewlinesInRange:range replacementText:text] ||
     [h2Style handleNewlinesInRange:range replacementText:text] ||
     [h3Style handleNewlinesInRange:range replacementText:text] ||
     [ZeroWidthSpaceUtils handleBackspaceInRange:range replacementText:text input:self] ||
-    [ParagraphAttributesUtils handleBackspaceInRange:range replacementText:text input:self]
+    [ParagraphAttributesUtils handleBackspaceInRange:range replacementText:text input:self] ||
+    // CRITICAL: This callback HAS TO be always evaluated last.
+    //
+    // This function is the "Generic Fallback": if no specific style claims the backspace action
+    // to change its state, only then do we proceed to physically delete the newline and merge paragraphs.
+    [ParagraphAttributesUtils handleNewlineBackspaceInRange:range replacementText:text input:self]
   ) {
     [self anyTextMayHaveBeenModified];
     return NO;

ios/config/InputConfig.h

@@ -64,4 +64,10 @@
 - (void)setLinkDecorationLine:(TextDecorationLineEnum)newValue;
 - (void)setMentionStyleProps:(NSDictionary *)newValue;
 - (MentionStyleProps *)mentionStylePropsForIndicator:(NSString *)indicator;
+- (UIColor *)codeBlockFgColor;
+- (void)setCodeBlockFgColor:(UIColor *)newValue;
+- (UIColor *)codeBlockBgColor;
+- (void)setCodeBlockBgColor:(UIColor *)newValue;
+- (CGFloat)codeBlockBorderRadius;
+- (void)setCodeBlockBorderRadius:(CGFloat)newValue;
 @end

ios/config/InputConfig.mm

@@ -36,6 +36,9 @@ @implementation InputConfig {
   UIColor *_linkColor;
   TextDecorationLineEnum _linkDecorationLine;
   NSDictionary *_mentionProperties;
+  UIColor *_codeBlockFgColor;
+  CGFloat _codeBlockBorderRadius;
+  UIColor *_codeBlockBgColor;
 }
 
 - (instancetype) init {
@@ -79,6 +82,9 @@ - (id)copyWithZone:(NSZone *)zone {
   copy->_linkColor = [_linkColor copy];
   copy->_linkDecorationLine = [_linkDecorationLine copy];
   copy->_mentionProperties = [_mentionProperties mutableCopy];
+  copy->_codeBlockFgColor = [_codeBlockFgColor copy];
+  copy->_codeBlockBgColor = [_codeBlockBgColor copy];
+  copy->_codeBlockBorderRadius = _codeBlockBorderRadius;
   return copy;
 }
 
@@ -379,4 +385,28 @@ - (MentionStyleProps *)mentionStylePropsForIndicator:(NSString *)indicator {
   return fallbackProps;
 }
 
+- (UIColor *)codeBlockFgColor {
+  return _codeBlockFgColor;
+}
+
+- (void)setCodeBlockFgColor:(UIColor *)newValue {
+  _codeBlockFgColor = newValue;
+}
+
+- (UIColor *)codeBlockBgColor {
+  return _codeBlockBgColor;
+}
+
+- (void)setCodeBlockBgColor:(UIColor *)newValue {
+  _codeBlockBgColor = newValue;
+}
+
+- (CGFloat)codeBlockBorderRadius {
+  return _codeBlockBorderRadius;
+}
+
+- (void)setCodeBlockBorderRadius:(CGFloat)newValue {
+  _codeBlockBorderRadius = newValue;
+}
+
 @end