From 6e91860147b528cb0c3034acbc302a00f77cf524 Mon Sep 17 00:00:00 2001
From: Gregory Moskaliuk <mosckalyuck@gmail.com>
Date: Fri, 24 Oct 2025 17:11:43 +0200
Subject: [PATCH] feat: implement new approach for adding spacers

---
 .../java/com/richtext/renderer/NodeRenderer.kt  |  6 ++++--
 .../src/main/java/com/richtext/utils/Utils.kt   | 14 ++++++++++++++
 ios/renderer/AttributedRenderer.m               | 17 +++--------------
 ios/utils/SpacingUtils.h                        | 15 +++++++++++++++
 ios/utils/SpacingUtils.m                        |  5 +++++
 5 files changed, 41 insertions(+), 16 deletions(-)
 create mode 100644 android/src/main/java/com/richtext/utils/Utils.kt
 create mode 100644 ios/utils/SpacingUtils.h
 create mode 100644 ios/utils/SpacingUtils.m

diff --git a/android/src/main/java/com/richtext/renderer/NodeRenderer.kt b/android/src/main/java/com/richtext/renderer/NodeRenderer.kt
index 22c5bbce..0ba9c86f 100644
--- a/android/src/main/java/com/richtext/renderer/NodeRenderer.kt
+++ b/android/src/main/java/com/richtext/renderer/NodeRenderer.kt
@@ -6,6 +6,7 @@ import com.richtext.spans.RichTextLinkSpan
 import com.richtext.spans.RichTextHeadingSpan
 import com.richtext.spans.RichTextParagraphSpan
 import com.richtext.spans.RichTextTextSpan
+import com.richtext.utils.addSpacing
 import org.commonmark.node.*
 
 interface NodeRenderer {
@@ -56,7 +57,7 @@ class ParagraphRenderer : NodeRenderer {
             )
         }
 
-        builder.append("\n")
+        builder.addSpacing()
     }
 }
 
@@ -84,7 +85,8 @@ class HeadingRenderer : NodeRenderer {
                 android.text.SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE
             )
         }
-        builder.append("\n")
+        
+        builder.addSpacing()
     }
 }
 
diff --git a/android/src/main/java/com/richtext/utils/Utils.kt b/android/src/main/java/com/richtext/utils/Utils.kt
new file mode 100644
index 00000000..fc9f19a2
--- /dev/null
+++ b/android/src/main/java/com/richtext/utils/Utils.kt
@@ -0,0 +1,14 @@
+package com.richtext.utils
+
+import android.text.SpannableStringBuilder
+
+/**
+ * Adds Zero Width Space spacing between markdown elements.
+ * 
+ * Uses \u200B (Zero Width Space) characters for spacing because:
+ * - Invisible but takes up space, providing consistent visual spacing
+ * - Doesn't interfere with text rendering or font metrics
+ */
+fun SpannableStringBuilder.addSpacing() {
+    append("\u200B\n\u200B\n")
+}
diff --git a/ios/renderer/AttributedRenderer.m b/ios/renderer/AttributedRenderer.m
index 72442b73..fe8b93cd 100644
--- a/ios/renderer/AttributedRenderer.m
+++ b/ios/renderer/AttributedRenderer.m
@@ -2,6 +2,7 @@
 #import "NodeRenderer.h"
 #import "RenderContext.h"
 #import "MarkdownASTNode.h"
+#import "SpacingUtils.h"
 
 @interface ParagraphRenderer : NSObject <NodeRenderer>
 @end
@@ -59,15 +60,8 @@ - (void)renderNodeRecursive:(MarkdownASTNode *)node
     for (NSUInteger i = 0; i < node.children.count; i++) {
         MarkdownASTNode *child = node.children[i];
         [self renderNodeRecursive:child into:out font:font color:color context:context isTopLevel:NO];
-        // Add spacing between paragraphs (MD4C doesn't provide empty lines between blocks)
-        // This is intentional rendering behavior to match markdown visual expectations
         if (child.type == MarkdownNodeTypeParagraph && i < node.children.count - 1) {
-            NSAttributedString *spacing = [[NSAttributedString alloc]
-                initWithString:@"\n\n"
-                attributes:@{
-                    NSFontAttributeName: font, 
-                    NSForegroundColorAttributeName: color
-                }];
+            NSAttributedString *spacing = createSpacing();
             [out appendAttributedString:spacing];
         }
     }
@@ -255,12 +249,7 @@ - (void)renderNode:(MarkdownASTNode *)node
         }
     }
     
-    NSAttributedString *spacing = [[NSAttributedString alloc] 
-        initWithString:@"\n\n" 
-        attributes:@{
-            NSFontAttributeName: font,
-            NSForegroundColorAttributeName: color
-        }];
+    NSAttributedString *spacing = createSpacing();
     [output appendAttributedString:spacing];
 }
 @end
diff --git a/ios/utils/SpacingUtils.h b/ios/utils/SpacingUtils.h
new file mode 100644
index 00000000..30658505
--- /dev/null
+++ b/ios/utils/SpacingUtils.h
@@ -0,0 +1,15 @@
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Creates NSAttributedString with Zero Width Space spacing.
+ * 
+ * Uses \u200B (Zero Width Space) characters for spacing because:
+ * - Invisible but takes up space, providing consistent visual spacing
+ * - Doesn't interfere with text rendering or font metrics
+ */
+extern NSAttributedString *createSpacing(void);
+
+NS_ASSUME_NONNULL_END
diff --git a/ios/utils/SpacingUtils.m b/ios/utils/SpacingUtils.m
new file mode 100644
index 00000000..5e13fc7f
--- /dev/null
+++ b/ios/utils/SpacingUtils.m
@@ -0,0 +1,5 @@
+#import "SpacingUtils.h"
+
+NSAttributedString *createSpacing(void) {
+    return [[NSAttributedString alloc] initWithString:@"\u200B\n\u200B\n"];
+}