update

node_modules/markdown-it/lib/parser_inline.js

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+/** internal
+ * class ParserInline
+ *
+ * Tokenizes paragraph content.
+ **/
+'use strict';
+
+
+var Ruler           = require('./ruler');
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Parser rules
+
+var _rules = [
+  [ 'text',            require('./rules_inline/text') ],
+  [ 'newline',         require('./rules_inline/newline') ],
+  [ 'escape',          require('./rules_inline/escape') ],
+  [ 'backticks',       require('./rules_inline/backticks') ],
+  [ 'strikethrough',   require('./rules_inline/strikethrough').tokenize ],
+  [ 'emphasis',        require('./rules_inline/emphasis').tokenize ],
+  [ 'link',            require('./rules_inline/link') ],
+  [ 'image',           require('./rules_inline/image') ],
+  [ 'autolink',        require('./rules_inline/autolink') ],
+  [ 'html_inline',     require('./rules_inline/html_inline') ],
+  [ 'entity',          require('./rules_inline/entity') ]
+];
+
+var _rules2 = [
+  [ 'balance_pairs',   require('./rules_inline/balance_pairs') ],
+  [ 'strikethrough',   require('./rules_inline/strikethrough').postProcess ],
+  [ 'emphasis',        require('./rules_inline/emphasis').postProcess ],
+  [ 'text_collapse',   require('./rules_inline/text_collapse') ]
+];
+
+
+/**
+ * new ParserInline()
+ **/
+function ParserInline() {
+  var i;
+
+  /**
+   * ParserInline#ruler -> Ruler
+   *
+   * [[Ruler]] instance. Keep configuration of inline rules.
+   **/
+  this.ruler = new Ruler();
+
+  for (i = 0; i < _rules.length; i++) {
+    this.ruler.push(_rules[i][0], _rules[i][1]);
+  }
+
+  /**
+   * ParserInline#ruler2 -> Ruler
+   *
+   * [[Ruler]] instance. Second ruler used for post-processing
+   * (e.g. in emphasis-like rules).
+   **/
+  this.ruler2 = new Ruler();
+
+  for (i = 0; i < _rules2.length; i++) {
+    this.ruler2.push(_rules2[i][0], _rules2[i][1]);
+  }
+}
+
+
+// Skip single token by running all rules in validation mode;
+// returns `true` if any rule reported success
+//
+ParserInline.prototype.skipToken = function (state) {
+  var ok, i, pos = state.pos,
+      rules = this.ruler.getRules(''),
+      len = rules.length,
+      maxNesting = state.md.options.maxNesting,
+      cache = state.cache;
+
+
+  if (typeof cache[pos] !== 'undefined') {
+    state.pos = cache[pos];
+    return;
+  }
+
+  if (state.level < maxNesting) {
+    for (i = 0; i < len; i++) {
+      // Increment state.level and decrement it later to limit recursion.
+      // It's harmless to do here, because no tokens are created. But ideally,
+      // we'd need a separate private state variable for this purpose.
+      //
+      state.level++;
+      ok = rules[i](state, true);
+      state.level--;
+
+      if (ok) { break; }
+    }
+  } else {
+    // Too much nesting, just skip until the end of the paragraph.
+    //
+    // NOTE: this will cause links to behave incorrectly in the following case,
+    //       when an amount of `[` is exactly equal to `maxNesting + 1`:
+    //
+    //       [[[[[[[[[[[[[[[[[[[[[foo]()
+    //
+    // TODO: remove this workaround when CM standard will allow nested links
+    //       (we can replace it by preventing links from being parsed in
+    //       validation mode)
+    //
+    state.pos = state.posMax;
+  }
+
+  if (!ok) { state.pos++; }
+  cache[pos] = state.pos;
+};
+
+
+// Generate tokens for input range
+//
+ParserInline.prototype.tokenize = function (state) {
+  var ok, i,
+      rules = this.ruler.getRules(''),
+      len = rules.length,
+      end = state.posMax,
+      maxNesting = state.md.options.maxNesting;
+
+  while (state.pos < end) {
+    // Try all possible rules.
+    // On success, rule should:
+    //
+    // - update `state.pos`
+    // - update `state.tokens`
+    // - return true
+
+    if (state.level < maxNesting) {
+      for (i = 0; i < len; i++) {
+        ok = rules[i](state, false);
+        if (ok) { break; }
+      }
+    }
+
+    if (ok) {
+      if (state.pos >= end) { break; }
+      continue;
+    }
+
+    state.pending += state.src[state.pos++];
+  }
+
+  if (state.pending) {
+    state.pushPending();
+  }
+};
+
+
+/**
+ * ParserInline.parse(str, md, env, outTokens)
+ *
+ * Process input string and push inline tokens into `outTokens`
+ **/
+ParserInline.prototype.parse = function (str, md, env, outTokens) {
+  var i, rules, len;
+  var state = new this.State(str, md, env, outTokens);
+
+  this.tokenize(state);
+
+  rules = this.ruler2.getRules('');
+  len = rules.length;
+
+  for (i = 0; i < len; i++) {
+    rules[i](state);
+  }
+};
+
+
+ParserInline.prototype.State = require('./rules_inline/state_inline');
+
+
+module.exports = ParserInline;