self host

1 files changed, 212 insertions, 0 deletions

diff --git a/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs b/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs
new file mode 100644
index 0000000..4166286
--- /dev/null
+++ b/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs
@@ -0,0 +1,212 @@
+import { isSpace, normalizeReference } from '../common/utils.mjs'
+
+export default function reference (state, startLine, _endLine, silent) {
+  let pos = state.bMarks[startLine] + state.tShift[startLine]
+  let max = state.eMarks[startLine]
+  let nextLine = startLine + 1
+
+  // if it's indented more than 3 spaces, it should be a code block
+  if (state.sCount[startLine] - state.blkIndent >= 4) { return false }
+
+  if (state.src.charCodeAt(pos) !== 0x5B/* [ */) { return false }
+
+  function getNextLine (nextLine) {
+    const endLine = state.lineMax
+
+    if (nextLine >= endLine || state.isEmpty(nextLine)) {
+      // empty line or end of input
+      return null
+    }
+
+    let isContinuation = false
+
+    // this would be a code block normally, but after paragraph
+    // it's considered a lazy continuation regardless of what's there
+    if (state.sCount[nextLine] - state.blkIndent > 3) { isContinuation = true }
+
+    // quirk for blockquotes, this line should already be checked by that rule
+    if (state.sCount[nextLine] < 0) { isContinuation = true }
+
+    if (!isContinuation) {
+      const terminatorRules = state.md.block.ruler.getRules('reference')
+      const oldParentType = state.parentType
+      state.parentType = 'reference'
+
+      // Some tags can terminate paragraph without empty line.
+      let terminate = false
+      for (let i = 0, l = terminatorRules.length; i < l; i++) {
+        if (terminatorRules[i](state, nextLine, endLine, true)) {
+          terminate = true
+          break
+        }
+      }
+
+      state.parentType = oldParentType
+      if (terminate) {
+        // terminated by another block
+        return null
+      }
+    }
+
+    const pos = state.bMarks[nextLine] + state.tShift[nextLine]
+    const max = state.eMarks[nextLine]
+
+    // max + 1 explicitly includes the newline
+    return state.src.slice(pos, max + 1)
+  }
+
+  let str = state.src.slice(pos, max + 1)
+
+  max = str.length
+  let labelEnd = -1
+
+  for (pos = 1; pos < max; pos++) {
+    const ch = str.charCodeAt(pos)
+    if (ch === 0x5B /* [ */) {
+      return false
+    } else if (ch === 0x5D /* ] */) {
+      labelEnd = pos
+      break
+    } else if (ch === 0x0A /* \n */) {
+      const lineContent = getNextLine(nextLine)
+      if (lineContent !== null) {
+        str += lineContent
+        max = str.length
+        nextLine++
+      }
+    } else if (ch === 0x5C /* \ */) {
+      pos++
+      if (pos < max && str.charCodeAt(pos) === 0x0A) {
+        const lineContent = getNextLine(nextLine)
+        if (lineContent !== null) {
+          str += lineContent
+          max = str.length
+          nextLine++
+        }
+      }
+    }
+  }
+
+  if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return false }
+
+  // [label]:   destination   'title'
+  //         ^^^ skip optional whitespace here
+  for (pos = labelEnd + 2; pos < max; pos++) {
+    const ch = str.charCodeAt(pos)
+    if (ch === 0x0A) {
+      const lineContent = getNextLine(nextLine)
+      if (lineContent !== null) {
+        str += lineContent
+        max = str.length
+        nextLine++
+      }
+    } else if (isSpace(ch)) {
+      /* eslint no-empty:0 */
+    } else {
+      break
+    }
+  }
+
+  // [label]:   destination   'title'
+  //            ^^^^^^^^^^^ parse this
+  const destRes = state.md.helpers.parseLinkDestination(str, pos, max)
+  if (!destRes.ok) { return false }
+
+  const href = state.md.normalizeLink(destRes.str)
+  if (!state.md.validateLink(href)) { return false }
+
+  pos = destRes.pos
+
+  // save cursor state, we could require to rollback later
+  const destEndPos = pos
+  const destEndLineNo = nextLine
+
+  // [label]:   destination   'title'
+  //                       ^^^ skipping those spaces
+  const start = pos
+  for (; pos < max; pos++) {
+    const ch = str.charCodeAt(pos)
+    if (ch === 0x0A) {
+      const lineContent = getNextLine(nextLine)
+      if (lineContent !== null) {
+        str += lineContent
+        max = str.length
+        nextLine++
+      }
+    } else if (isSpace(ch)) {
+      /* eslint no-empty:0 */
+    } else {
+      break
+    }
+  }
+
+  // [label]:   destination   'title'
+  //                          ^^^^^^^ parse this
+  let titleRes = state.md.helpers.parseLinkTitle(str, pos, max)
+  while (titleRes.can_continue) {
+    const lineContent = getNextLine(nextLine)
+    if (lineContent === null) break
+    str += lineContent
+    pos = max
+    max = str.length
+    nextLine++
+    titleRes = state.md.helpers.parseLinkTitle(str, pos, max, titleRes)
+  }
+  let title
+
+  if (pos < max && start !== pos && titleRes.ok) {
+    title = titleRes.str
+    pos = titleRes.pos
+  } else {
+    title = ''
+    pos = destEndPos
+    nextLine = destEndLineNo
+  }
+
+  // skip trailing spaces until the rest of the line
+  while (pos < max) {
+    const ch = str.charCodeAt(pos)
+    if (!isSpace(ch)) { break }
+    pos++
+  }
+
+  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
+    if (title) {
+      // garbage at the end of the line after title,
+      // but it could still be a valid reference if we roll back
+      title = ''
+      pos = destEndPos
+      nextLine = destEndLineNo
+      while (pos < max) {
+        const ch = str.charCodeAt(pos)
+        if (!isSpace(ch)) { break }
+        pos++
+      }
+    }
+  }
+
+  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
+    // garbage at the end of the line
+    return false
+  }
+
+  const label = normalizeReference(str.slice(1, labelEnd))
+  if (!label) {
+    // CommonMark 0.20 disallows empty labels
+    return false
+  }
+
+  // Reference can not terminate anything. This check is for safety only.
+  /* istanbul ignore if */
+  if (silent) { return true }
+
+  if (typeof state.env.references === 'undefined') {
+    state.env.references = {}
+  }
+  if (typeof state.env.references[label] === 'undefined') {
+    state.env.references[label] = { title, href }
+  }
+
+  state.line = nextLine
+  return true
+}