fix(subParsers/lists.js): partial fix for odd behavior on multiple consecutive lists

Consecutive lists we're previously being condensed into one unique list, with odd paragraph output.
This fix correctly splits lists, but does not change the weird paragraph output

closes #142

src/subParsers/lists.js

@@ -4,13 +4,15 @@
 showdown.subParser('lists', function (text, options, globals) {
   'use strict';
 
+  var spl = '~1';
+
   /**
    * Process the contents of a single ordered or unordered list, splitting it
    * into individual list items.
    * @param {string} listStr
-   * @returns {string|*}
+   * @returns {string}
    */
-  var processListItems = function (listStr) {
+  function processListItems (listStr) {
     // The $g_list_level global keeps track of when we're inside a list.
     // Each time we enter a list, we increment it; when we leave a list,
     // we decrement. If it's zero, we're not in a list anymore.
@@ -50,8 +52,9 @@ showdown.subParser('lists', function (text, options, globals) {
      (?= \n* (~0 | \2 ([*+-]|\d+[.]) [ \t]+))
      /gm, function(){...});
      */
-    listStr = listStr.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,
-                              function (wholeMatch, m1, m2, m3, m4) {
+    var rgx = /(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm;
+
+    listStr = listStr.replace(rgx, function (wholeMatch, m1, m2, m3, m4) {
       var item = showdown.subParser('outdent')(m4, options, globals);
       //m1 - LeadingLine
 
@@ -64,7 +67,10 @@ showdown.subParser('lists', function (text, options, globals) {
         item = showdown.subParser('spanGamut')(item, options, globals);
       }
 
-                                return '<li>' + item + '</li>\n';
+      // this is a "hack" to differentiate between ordered and unordered lists
+      // related to issue #142
+      var tp = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
+      return spl + tp + '<li>' + item + '</li>\n';
     });
 
     // attacklab: strip sentinel
@@ -72,13 +78,53 @@ showdown.subParser('lists', function (text, options, globals) {
 
     globals.gListLevel--;
     return listStr;
-  };
+  }
+
+  /**
+   * Slit consecutive ol/ul lists (related to issue 142)
+   * @param {Array} results
+   * @param {string} listType
+   * @returns {string|*}
+   */
+  function splitConsecutiveLists (results, listType) {
+    var cthulhu = /(<p[^>]+?>|<p>|<\/p>)/img,
+        holder = [[]],
+        res = '',
+        y = 0;
+
+    // Initialize first sublist
+    holder[0].type = listType;
+
+    for (var i = 0; i < results.length; ++i) {
+      var txt = results[i].slice(2),
+          nListType = results[i].slice(0, 2);
+
+      if (listType != nListType) {
+        y++;
+        holder[y] = [];
+        holder[y].type = nListType;
+        listType = nListType;
+      }
+      holder[y].push(txt);
+    }
+    for (i = 0; i < holder.length; ++i) {
+      res += '<' + holder[i].type + '>\n';
+      for (var ii = 0; ii < holder[i].length; ++ii) {
+        if (holder[i].length > 1 && ii === holder[i].length - 1 && !cthulhu.test(holder[i][ii - 1])) {
+          //holder[i][ii] = holder[i][ii].replace(cthulhu, '');
+        }
+        res += holder[i][ii];
+      }
+      res += '</' + holder[i].type + '>\n';
+    }
+    return res;
+  }
 
   // attacklab: add sentinel to hack around khtml/safari bug:
   // http://bugs.webkit.org/show_bug.cgi?id=11231
   text += '~0';
 
-  // Re-usable pattern to match any entirel ul or ol list:
+  // Re-usable pattern to match any entire ul or ol list:
 
   /*
    var whole_list = /
@@ -105,35 +151,40 @@ showdown.subParser('lists', function (text, options, globals) {
 
   if (globals.gListLevel) {
     text = text.replace(wholeList, function (wholeMatch, m1, m2) {
-      var list = m1,
-          listType = (m2.search(/[*+-]/g) > -1) ? 'ul' : 'ol';
+      var listType = (m2.search(/[*+-]/g) > -1) ? 'ul' : 'ol',
+          result = processListItems(m1);
 
       // Turn double returns into triple returns, so that we can make a
       // paragraph for the last item in a list, if necessary:
-      list = list.replace(/\n{2,}/g, '\n\n\n');
-
-      var result = processListItems(list);
+      //list = list.replace(/\n{2,}/g, '\n\n\n');
+      //result = processListItems(list);
 
       // Trim any trailing whitespace, to put the closing `</$list_type>`
       // up on the preceding line, to get it past the current stupid
       // HTML block parser. This is a hack to work around the terrible
       // hack that is the HTML block parser.
       result = result.replace(/\s+$/, '');
-      result = '<' + listType + '>' + result + '</' + listType + '>\n';
+      var splRes = result.split(spl);
+      splRes.shift();
+      result = splitConsecutiveLists(splRes, listType);
       return result;
     });
   } else {
     wholeList = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
+    //wholeList = /(\n\n|^\n?)( {0,3}([*+-]|\d+\.)[ \t]+[\s\S]+?)(?=(~0)|(\n\n(?!\t| {2,}| {0,3}([*+-]|\d+\.)[ \t])))/g;
 
     text = text.replace(wholeList, function (wholeMatch, m1, m2, m3) {
 
       // Turn double returns into triple returns, so that we can make a
       // paragraph for the last item in a list, if necessary:
       var list = m2.replace(/\n{2,}/g, '\n\n\n'),
+      //var list = (m2.slice(-2) !== '~0') ? m2 + '\n' : m2, //add a newline after the list
           listType = (m3.search(/[*+-]/g) > -1) ? 'ul' : 'ol',
-          result = processListItems(list);
+          result = processListItems(list),
+          splRes = result.split(spl);
 
-      return m1 + '<' + listType + '>\n' + result + '</' + listType + '>\n';
+      splRes.shift();
+      return m1 + splitConsecutiveLists(splRes, listType) + '\n';
     });
   }
 

test/issues/#142.odd_behaviour_for_multiple_consecutive_lists.html

@@ -1,8 +1,8 @@
 <ul>
     <li>Item 1</li>
-    <li>Item 2</li>
+    <li><p>Item 2</p></li>
 </ul>
 <ol>
-    <li>Item 1</li>
+    <li><p>Item 1</p></li>
     <li>Item 2</li>
 </ol>