From c70945425e4c430684421dfb3d14afac9cdc062f Mon Sep 17 00:00:00 2001
From: Angelika Serwa <angelika.serwa@swmansion.com>
Date: Wed, 1 Jul 2026 14:48:54 +0200
Subject: [PATCH] feat(ios): add line break rendering

Render hard line breaks as U+2028 inside paragraphs so TextKit
preserves intra-paragraph breaks without starting new blocks.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 .../Rendering/RendererFactory.swift               |  2 ++
 .../Rendering/Renderers/LineBreakRenderer.swift   | 13 +++++++++++++
 .../EnrichedMarkdownTests/RendererTests.swift     | 15 +++++++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/Renderers/LineBreakRenderer.swift

diff --git a/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/RendererFactory.swift b/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/RendererFactory.swift
index d17cbd612..ed424c4da 100644
--- a/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/RendererFactory.swift
+++ b/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/RendererFactory.swift
@@ -43,6 +43,8 @@ final class RendererFactory {
             return HeadingRenderer(factory: self, config: config)
         case .link:
             return LinkRenderer(factory: self, config: config)
+        case .lineBreak:
+            return LineBreakRenderer()
         default:
             return childrenOnlyRenderer
         }
diff --git a/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/Renderers/LineBreakRenderer.swift b/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/Renderers/LineBreakRenderer.swift
new file mode 100644
index 000000000..1a7d53244
--- /dev/null
+++ b/packages/ios-enriched-markdown/Sources/EnrichedMarkdown/Rendering/Renderers/LineBreakRenderer.swift
@@ -0,0 +1,13 @@
+import UIKit
+
+final class LineBreakRenderer: NodeRenderer {
+    private static let lineSeparator = "\u{2028}"
+
+    func render(node: MarkdownASTNode, into output: NSMutableAttributedString, context: RenderContext) {
+        let lineBreak = NSAttributedString(
+            string: Self.lineSeparator,
+            attributes: context.getTextAttributes()
+        )
+        output.append(lineBreak)
+    }
+}
diff --git a/packages/ios-enriched-markdown/Tests/EnrichedMarkdownTests/RendererTests.swift b/packages/ios-enriched-markdown/Tests/EnrichedMarkdownTests/RendererTests.swift
index 8812eeb2e..8f0ec4c93 100644
--- a/packages/ios-enriched-markdown/Tests/EnrichedMarkdownTests/RendererTests.swift
+++ b/packages/ios-enriched-markdown/Tests/EnrichedMarkdownTests/RendererTests.swift
@@ -300,6 +300,21 @@ final class RendererTests: XCTestCase {
 
     A paragraph with a [link](https://example.com) and **bold** nearby.
     """
+
+
+    func testHardLineBreakUsesLineSeparator() {
+        let result = MarkdownRenderer.render("Line one  \nLine two", config: config)
+        XCTAssertTrue(result.string.contains("Line one"))
+        XCTAssertTrue(result.string.contains("Line two"))
+        XCTAssertTrue(result.string.contains("\u{2028}"))
+
+        let separatorRange = (result.string as NSString).range(of: "\u{2028}")
+        XCTAssertNotEqual(separatorRange.location, NSNotFound)
+
+        var effectiveRange = NSRange()
+        let attributes = result.attributes(at: separatorRange.location, effectiveRange: &effectiveRange)
+        XCTAssertNotNil(attributes[.font] as? UIFont)
+    }
 }
 
 private extension String {