update

node_modules/markdown-it/lib/helpers/parse_link_destination.js

@@ -0,0 +1,80 @@
+// Parse link destination
+//
+'use strict';
+
+
+var isSpace     = require('../common/utils').isSpace;
+var unescapeAll = require('../common/utils').unescapeAll;
+
+
+module.exports = function parseLinkDestination(str, pos, max) {
+  var code, level,
+      lines = 0,
+      start = pos,
+      result = {
+        ok: false,
+        pos: 0,
+        lines: 0,
+        str: ''
+      };
+
+  if (str.charCodeAt(pos) === 0x3C /* < */) {
+    pos++;
+    while (pos < max) {
+      code = str.charCodeAt(pos);
+      if (code === 0x0A /* \n */ || isSpace(code)) { return result; }
+      if (code === 0x3E /* > */) {
+        result.pos = pos + 1;
+        result.str = unescapeAll(str.slice(start + 1, pos));
+        result.ok = true;
+        return result;
+      }
+      if (code === 0x5C /* \ */ && pos + 1 < max) {
+        pos += 2;
+        continue;
+      }
+
+      pos++;
+    }
+
+    // no closing '>'
+    return result;
+  }
+
+  // this should be ... } else { ... branch
+
+  level = 0;
+  while (pos < max) {
+    code = str.charCodeAt(pos);
+
+    if (code === 0x20) { break; }
+
+    // ascii control characters
+    if (code < 0x20 || code === 0x7F) { break; }
+
+    if (code === 0x5C /* \ */ && pos + 1 < max) {
+      pos += 2;
+      continue;
+    }
+
+    if (code === 0x28 /* ( */) {
+      level++;
+    }
+
+    if (code === 0x29 /* ) */) {
+      if (level === 0) { break; }
+      level--;
+    }
+
+    pos++;
+  }
+
+  if (start === pos) { return result; }
+  if (level !== 0) { return result; }
+
+  result.str = unescapeAll(str.slice(start, pos));
+  result.lines = lines;
+  result.pos = pos;
+  result.ok = true;
+  return result;
+};