self host

1 files changed, 124 insertions, 0 deletions

diff --git a/packages/markdown-it-14.1.0/lib/rules_inline/balance_pairs.mjs b/packages/markdown-it-14.1.0/lib/rules_inline/balance_pairs.mjs
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+// For each opening emphasis-like marker find a matching closing one
+//
+
+function processDelimiters (delimiters) {
+  const openersBottom = {}
+  const max = delimiters.length
+
+  if (!max) return
+
+  // headerIdx is the first delimiter of the current (where closer is) delimiter run
+  let headerIdx = 0
+  let lastTokenIdx = -2 // needs any value lower than -1
+  const jumps = []
+
+  for (let closerIdx = 0; closerIdx < max; closerIdx++) {
+    const closer = delimiters[closerIdx]
+
+    jumps.push(0)
+
+    // markers belong to same delimiter run if:
+    //  - they have adjacent tokens
+    //  - AND markers are the same
+    //
+    if (delimiters[headerIdx].marker !== closer.marker || lastTokenIdx !== closer.token - 1) {
+      headerIdx = closerIdx
+    }
+
+    lastTokenIdx = closer.token
+
+    // Length is only used for emphasis-specific "rule of 3",
+    // if it's not defined (in strikethrough or 3rd party plugins),
+    // we can default it to 0 to disable those checks.
+    //
+    closer.length = closer.length || 0
+
+    if (!closer.close) continue
+
+    // Previously calculated lower bounds (previous fails)
+    // for each marker, each delimiter length modulo 3,
+    // and for whether this closer can be an opener;
+    // https://github.com/commonmark/cmark/commit/34250e12ccebdc6372b8b49c44fab57c72443460
+    /* eslint-disable-next-line no-prototype-builtins */
+    if (!openersBottom.hasOwnProperty(closer.marker)) {
+      openersBottom[closer.marker] = [-1, -1, -1, -1, -1, -1]
+    }
+
+    const minOpenerIdx = openersBottom[closer.marker][(closer.open ? 3 : 0) + (closer.length % 3)]
+
+    let openerIdx = headerIdx - jumps[headerIdx] - 1
+
+    let newMinOpenerIdx = openerIdx
+
+    for (; openerIdx > minOpenerIdx; openerIdx -= jumps[openerIdx] + 1) {
+      const opener = delimiters[openerIdx]
+
+      if (opener.marker !== closer.marker) continue
+
+      if (opener.open && opener.end < 0) {
+        let isOddMatch = false
+
+        // from spec:
+        //
+        // If one of the delimiters can both open and close emphasis, then the
+        // sum of the lengths of the delimiter runs containing the opening and
+        // closing delimiters must not be a multiple of 3 unless both lengths
+        // are multiples of 3.
+        //
+        if (opener.close || closer.open) {
+          if ((opener.length + closer.length) % 3 === 0) {
+            if (opener.length % 3 !== 0 || closer.length % 3 !== 0) {
+              isOddMatch = true
+            }
+          }
+        }
+
+        if (!isOddMatch) {
+          // If previous delimiter cannot be an opener, we can safely skip
+          // the entire sequence in future checks. This is required to make
+          // sure algorithm has linear complexity (see *_*_*_*_*_... case).
+          //
+          const lastJump = openerIdx > 0 && !delimiters[openerIdx - 1].open
+            ? jumps[openerIdx - 1] + 1
+            : 0
+
+          jumps[closerIdx] = closerIdx - openerIdx + lastJump
+          jumps[openerIdx] = lastJump
+
+          closer.open  = false
+          opener.end   = closerIdx
+          opener.close = false
+          newMinOpenerIdx = -1
+          // treat next token as start of run,
+          // it optimizes skips in **<...>**a**<...>** pathological case
+          lastTokenIdx = -2
+          break
+        }
+      }
+    }
+
+    if (newMinOpenerIdx !== -1) {
+      // If match for this delimiter run failed, we want to set lower bound for
+      // future lookups. This is required to make sure algorithm has linear
+      // complexity.
+      //
+      // See details here:
+      // https://github.com/commonmark/cmark/issues/178#issuecomment-270417442
+      //
+      openersBottom[closer.marker][(closer.open ? 3 : 0) + ((closer.length || 0) % 3)] = newMinOpenerIdx
+    }
+  }
+}
+
+export default function link_pairs (state) {
+  const tokens_meta = state.tokens_meta
+  const max = state.tokens_meta.length
+
+  processDelimiters(state.delimiters)
+
+  for (let curr = 0; curr < max; curr++) {
+    if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
+      processDelimiters(tokens_meta[curr].delimiters)
+    }
+  }
+}