feat(ios): add paragraphSpacing support to checkbox list

Add a `paragraphSpacing` property to `ulCheckbox` in `HtmlStyle` to control
vertical spacing between checkbox list items on iOS. Uses
`NSMutableParagraphStyle.paragraphSpacing` which was already available but
not wired up.

Defaults to 0 (no change in existing behavior).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ErionTp

ios/EnrichedTextInputView.mm

@@ -652,6 +652,12 @@ - (void)updateProps:(Props::Shared const &)props
     }
   }
 
+  if (newViewProps.htmlStyle.ulCheckbox.paragraphSpacing !=
+      oldViewProps.htmlStyle.ulCheckbox.paragraphSpacing) {
+    [newConfig setCheckboxListParagraphSpacing:newViewProps.htmlStyle.ulCheckbox.paragraphSpacing];
+    stylePropChanged = YES;
+  }
+
   if (newViewProps.htmlStyle.a.textDecorationLine !=
       oldViewProps.htmlStyle.a.textDecorationLine) {
     NSString *objcString =

ios/config/InputConfig.h

@@ -99,6 +99,8 @@
 - (void)setCheckboxListMarginLeft:(CGFloat)newValue;
 - (UIColor *)checkboxListBoxColor;
 - (void)setCheckboxListBoxColor:(UIColor *)newValue;
+- (CGFloat)checkboxListParagraphSpacing;
+- (void)setCheckboxListParagraphSpacing:(CGFloat)newValue;
 - (UIImage *)checkboxCheckedImage;
 - (UIImage *)checkboxUncheckedImage;
 @end

ios/config/InputConfig.mm

@@ -52,6 +52,7 @@ @implementation InputConfig {
   CGFloat _checkboxListGapWidth;
   CGFloat _checkboxListMarginLeft;
   UIColor *_checkboxListBoxColor;
+  CGFloat _checkboxListParagraphSpacing;
   UIImage *_checkboxCheckedImage;
   UIImage *_checkboxUncheckedImage;
 }
@@ -113,6 +114,7 @@ - (id)copyWithZone:(NSZone *)zone {
   copy->_checkboxListGapWidth = _checkboxListGapWidth;
   copy->_checkboxListMarginLeft = _checkboxListMarginLeft;
   copy->_checkboxListBoxColor = [_checkboxListBoxColor copy];
+  copy->_checkboxListParagraphSpacing = _checkboxListParagraphSpacing;
   copy->_checkboxCheckedImage = _checkboxCheckedImage;
   copy->_checkboxUncheckedImage = _checkboxUncheckedImage;
   return copy;
@@ -596,6 +598,14 @@ - (void)setCheckboxListBoxColor:(UIColor *)newValue {
   }
 }
 
+- (CGFloat)checkboxListParagraphSpacing {
+  return _checkboxListParagraphSpacing;
+}
+
+- (void)setCheckboxListParagraphSpacing:(CGFloat)newValue {
+  _checkboxListParagraphSpacing = newValue;
+}
+
 - (UIImage *)checkboxCheckedImage {
   if (!_checkboxCheckedImage) {
     _checkboxCheckedImage = [self generateCheckboxImage:YES];

ios/styles/CheckboxListStyle.mm

@@ -81,6 +81,7 @@ - (void)removeAttributes:(NSRange)range {
                   pStyle.textLists = @[];
                   pStyle.headIndent = 0;
                   pStyle.firstLineHeadIndent = 0;
+                  pStyle.paragraphSpacing = 0;
                   [_input->textView.textStorage
                       addAttribute:NSParagraphStyleAttributeName
                              value:pStyle
@@ -98,6 +99,7 @@ - (void)removeAttributes:(NSRange)range {
   pStyle.textLists = @[];
   pStyle.headIndent = 0;
   pStyle.firstLineHeadIndent = 0;
+  pStyle.paragraphSpacing = 0;
   typingAttrs[NSParagraphStyleAttributeName] = pStyle;
   _input->textView.typingAttributes = typingAttrs;
 }
@@ -220,6 +222,7 @@ - (void)addAttributesWithCheckedValue:(BOOL)checked
                   pStyle.textLists = @[ checkboxMarker ];
                   pStyle.headIndent = [self getHeadIndent];
                   pStyle.firstLineHeadIndent = [self getHeadIndent];
+                  pStyle.paragraphSpacing = [_input->config checkboxListParagraphSpacing];
                   [_input->textView.textStorage
                       addAttribute:NSParagraphStyleAttributeName
                              value:pStyle
@@ -249,6 +252,7 @@ - (void)addAttributesWithCheckedValue:(BOOL)checked
     pStyle.textLists = @[ checkboxMarker ];
     pStyle.headIndent = [self getHeadIndent];
     pStyle.firstLineHeadIndent = [self getHeadIndent];
+    pStyle.paragraphSpacing = [_input->config checkboxListParagraphSpacing];
     typingAttrs[NSParagraphStyleAttributeName] = pStyle;
     _input->textView.typingAttributes = typingAttrs;
   }

src/spec/EnrichedTextInputNativeComponent.ts

@@ -342,6 +342,7 @@ export interface HtmlStyleInternal {
     boxSize?: Float;
     marginLeft?: Float;
     boxColor?: ColorValue;
+    paragraphSpacing?: Float;
   };
 }
 

src/types.ts

@@ -55,5 +55,6 @@ export interface HtmlStyle {
     gapWidth?: number;
     marginLeft?: number;
     boxColor?: ColorValue;
+    paragraphSpacing?: number;
   };
 }

src/utils/normalizeHtmlStyle.ts

@@ -68,6 +68,7 @@ const defaultStyle: Required<HtmlStyle> = {
     gapWidth: 16,
     marginLeft: 16,
     boxColor: 'blue',
+    paragraphSpacing: 0,
   },
 };