1 files changed, 51 insertions, 0 deletions
diff --git a/packages/markdown-it-14.1.0/lib/rules_block/heading.mjs b/packages/markdown-it-14.1.0/lib/rules_block/heading.mjs
new file mode 100644
index 0000000..d2f7b79
--- /dev/null
+++ b/packages/markdown-it-14.1.0/lib/rules_block/heading.mjs
@@ -0,0 +1,51 @@
+// heading (#, ##, ...)
+
+import { isSpace } from '../common/utils.mjs'
+
+export default function heading (state, startLine, endLine, silent) {
+  let pos = state.bMarks[startLine] + state.tShift[startLine]
+  let max = state.eMarks[startLine]
+
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false }
+
+  let ch  = state.src.charCodeAt(pos)
+
+  if (ch !== 0x23/* # */ || pos >= max) { return false }
+
+  // count heading level
+  let level = 1
+  ch = state.src.charCodeAt(++pos)
+  while (ch === 0x23/* # */ && pos < max && level <= 6) {
+    level++
+    ch = state.src.charCodeAt(++pos)
+  }
+
+  if (level > 6 || (pos < max && !isSpace(ch))) { return false }
+
+  if (silent) { return true }
+
+  // Let's cut tails like '    ###  ' from the end of string
+
+  max = state.skipSpacesBack(max, pos)
+  const tmp = state.skipCharsBack(max, 0x23, pos) // #
+  if (tmp > pos && isSpace(state.src.charCodeAt(tmp - 1))) {
+    max = tmp
+  }
+
+  state.line = startLine + 1
+
+  const token_o  = state.push('heading_open', 'h' + String(level), 1)
+  token_o.markup = '########'.slice(0, level)
+  token_o.map    = [startLine, state.line]
+
+  const token_i    = state.push('inline', '', 0)
+  token_i.content  = state.src.slice(pos, max).trim()
+  token_i.map      = [startLine, state.line]
+  token_i.children = []
+
+  const token_c  = state.push('heading_close', 'h' + String(level), -1)
+  token_c.markup = '########'.slice(0, level)
+
+  return true
+}