fix: fix Setext continuation in blockquote (#3257)

UziTech · web-flow · commit e9f0eed707ec · 2024-04-18T23:06:58.000-06:00
diff --git a/src/Tokenizer.ts b/src/Tokenizer.ts
@@ -156,7 +156,9 @@ export class _Tokenizer {
   blockquote(src: string): Tokens.Blockquote | undefined {
     const cap = this.rules.block.blockquote.exec(src);
     if (cap) {
-      const text = rtrim(cap[0].replace(/^ *>[ \t]?/gm, ''), '\n');
+      // precede setext continuation with 4 spaces so it isn't a setext
+      let text = cap[0].replace(/\n {0,3}((?:=+|-+) *)(?=\n|$)/g, '\n    $1');
+      text = rtrim(text.replace(/^ *>[ \t]?/gm, ''), '\n');
       const top = this.lexer.state.top;
       this.lexer.state.top = true;
       const tokens = this.lexer.blockTokens(text);
diff --git a/src/rules.ts b/src/rules.ts
@@ -58,7 +58,7 @@ const html = edit(
 const paragraph = edit(_paragraph)
   .replace('hr', hr)
   .replace('heading', ' {0,3}#{1,6}(?:\\s|$)')
-  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+  .replace('|lheading', '') // setext headings don't interrupt commonmark paragraphs
   .replace('|table', '')
   .replace('blockquote', ' {0,3}>')
   .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
@@ -117,7 +117,7 @@ const blockGfm: Record<BlockKeys, RegExp> = {
   paragraph: edit(_paragraph)
     .replace('hr', hr)
     .replace('heading', ' {0,3}#{1,6}(?:\\s|$)')
-    .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+    .replace('|lheading', '') // setext headings don't interrupt commonmark paragraphs
     .replace('table', gfmTable) // interrupt paragraphs with table
     .replace('blockquote', ' {0,3}>')
     .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
diff --git a/test/specs/commonmark/commonmark.0.31.json b/test/specs/commonmark/commonmark.0.31.json
@@ -743,8 +743,7 @@
     "example": 93,
     "start_line": 1527,
     "end_line": 1537,
-    "section": "Setext headings",
-    "shouldFail": true
+    "section": "Setext headings"
   },
   {
     "markdown": "- Foo\n---\n",
diff --git a/test/specs/gfm/commonmark.0.31.json b/test/specs/gfm/commonmark.0.31.json
@@ -743,8 +743,7 @@
     "example": 93,
     "start_line": 1527,
     "end_line": 1537,
-    "section": "Setext headings",
-    "shouldFail": true
+    "section": "Setext headings"
   },
   {
     "markdown": "- Foo\n---\n",
diff --git a/test/specs/new/blockquote_setext.html b/test/specs/new/blockquote_setext.html
@@ -0,0 +1,19 @@
+<blockquote>
+  <p>not heading 1 ==</p>
+</blockquote>
+
+<blockquote>
+  <p>not heading 2 --</p>
+</blockquote>
+
+<blockquote>
+  <h1>heading 1</h1>
+</blockquote>
+
+<blockquote>
+  <h2>heading 2</h2>
+</blockquote>
+
+<blockquote>
+  <p>not heading 1 == not heading 2 with br<br />--</p>
+</blockquote>
diff --git a/test/specs/new/blockquote_setext.md b/test/specs/new/blockquote_setext.md
@@ -0,0 +1,16 @@
+> not heading 1
+==
+
+> not heading 2
+--
+
+> heading 1
+> ==
+
+> heading 2
+> --
+
+> not heading 1
+==
+> not heading 2 with br  
+--
diff --git a/test/specs/new/setext_no_blankline.html b/test/specs/new/setext_no_blankline.html
@@ -4,8 +4,6 @@
 <p>fenced code block</p>
 <pre><code>=
 </code></pre>
-<blockquote><h1>blockquote</h1>
-</blockquote>
 <h3>heading</h3>
 <p>=</p>
 <html>
diff --git a/test/specs/new/setext_no_blankline.md b/test/specs/new/setext_no_blankline.md
@@ -6,9 +6,6 @@ fenced code block
 =
 ```
 
-> blockquote
-=
-
 ### heading
 =
 

Original file line number	Diff line number	Diff line change
`@@ -6,9 +6,6 @@ fenced code block`
`6`	`6`	`=`
`7`	`7`	```
`8`	`8`
`9`		`-> blockquote`
`10`		`-=`
`11`		`-`
`12`	`9`	`### heading`
`13`	`10`	`=`
`14`	`11`