Parser: Set ordered list_item_open token info to input marker.

For instance, in a list

    1. Item 1
    20. Item 2

the first list_item_open token will have token.info === '1', and the
second will have token.info === '20'.

This is useful for later rendering plugins that might want to
use the actual markers.

lib/rules_block/list.js

@@ -161,7 +161,7 @@ module.exports = function list(state, startLine, endLine, silent) {
   if ((posAfterMarker = skipOrderedListMarker(state, startLine)) >= 0) {
     isOrdered = true;
     start = state.bMarks[startLine] + state.tShift[startLine];
-    markerValue = Number(state.src.substr(start, posAfterMarker - start - 1));
+    markerValue = Number(state.src.slice(start, posAfterMarker - 1));
 
     // If we're starting a new ordered list right after
     // a paragraph, it should start with 1.
@@ -254,6 +254,9 @@ module.exports = function list(state, startLine, endLine, silent) {
     token        = state.push('list_item_open', 'li', 1);
     token.markup = String.fromCharCode(markerCharCode);
     token.map    = itemLines = [ startLine, 0 ];
+    if (isOrdered) {
+      token.info = state.src.slice(start, posAfterMarker - 1);
+    }
 
     // change current state, then restore it after parser subcall
     oldTight = state.tight;
@@ -330,6 +333,7 @@ module.exports = function list(state, startLine, endLine, silent) {
     if (isOrdered) {
       posAfterMarker = skipOrderedListMarker(state, nextLine);
       if (posAfterMarker < 0) { break; }
+      start = state.bMarks[nextLine] + state.tShift[nextLine];
     } else {
       posAfterMarker = skipBulletListMarker(state, nextLine);
       if (posAfterMarker < 0) { break; }

lib/token.js

@@ -88,6 +88,7 @@ function Token(type, tag, nesting) {
    *
    * - Info string for "fence" tokens
    * - The value "auto" for autolink "link_open" and "link_close" tokens
+   * - The string value of the item marker for ordered-list "list_item_open" tokens
    **/
   this.info     = '';
 

test/misc.js

@@ -362,6 +362,41 @@ describe('smartquotes', function () {
 });
 
 
+describe('Ordered list info', function () {
+  var md = markdownit();
+
+  function type_filter(tokens, type) {
+    return tokens.filter(function (t) { return t.type === type; });
+  }
+
+  it('Should mark ordered list item tokens with info', function () {
+    var tokens = md.parse('1. Foo\n2. Bar\n20. Fuzz');
+    assert.strictEqual(type_filter(tokens, 'ordered_list_open').length, 1);
+    tokens = type_filter(tokens, 'list_item_open');
+    assert.strictEqual(tokens.length, 3);
+    assert.strictEqual(tokens[0].info, '1');
+    assert.strictEqual(tokens[0].markup, '.');
+    assert.strictEqual(tokens[1].info, '2');
+    assert.strictEqual(tokens[1].markup, '.');
+    assert.strictEqual(tokens[2].info, '20');
+    assert.strictEqual(tokens[2].markup, '.');
+
+    tokens = md.parse(' 1. Foo\n2. Bar\n  20. Fuzz\n 199. Flp');
+    assert.strictEqual(type_filter(tokens, 'ordered_list_open').length, 1);
+    tokens = type_filter(tokens, 'list_item_open');
+    assert.strictEqual(tokens.length, 4);
+    assert.strictEqual(tokens[0].info, '1');
+    assert.strictEqual(tokens[0].markup, '.');
+    assert.strictEqual(tokens[1].info, '2');
+    assert.strictEqual(tokens[1].markup, '.');
+    assert.strictEqual(tokens[2].info, '20');
+    assert.strictEqual(tokens[2].markup, '.');
+    assert.strictEqual(tokens[3].info, '199');
+    assert.strictEqual(tokens[3].markup, '.');
+  });
+});
+
+
 describe('Token attributes', function () {
   it('.attrJoin', function () {
     var md = markdownit();