add markdown support for color quotes and fix codeblocks for quotes

hexojs/hexo#2400

scripts/99_tags.js

@@ -3,5 +3,26 @@
  */
 hexo.extend.tag.register('colorquote', function (args, content) {
     var type =  args[0];
-    return '<blockquote class="colorquote ' + type + '">' + content + '</blockquote>';
-}, {ends: true});
+    return '<blockquote class="colorquote ' + type + '">' + hexo.render.renderSync({text: content, engine: 'markdown'}) + '</blockquote>';
+}, {ends: true});
+
+const rEscapeContent = /<escape(?:[^>]*)>([\s\S]*?)<\/escape>/g;
+const placeholder = '\uFFFD';
+const rPlaceholder = /(?:<|&lt;)\!--\uFFFD(\d+)--(?:>|&gt;)/g;
+const cache = [];
+function escapeContent(str) {
+  return '<!--' + placeholder + (cache.push(str) - 1) + '-->';
+}
+hexo.extend.filter.register('before_post_render', function(data) {
+  data.content = data.content.replace(rEscapeContent, function(match, content) {
+    return escapeContent(content);
+  });
+  return data;
+});
+
+hexo.extend.filter.register('after_post_render', function(data) {
+  data.content = data.content.replace(rPlaceholder, function() {
+    return cache[arguments[1]];
+  });
+  return data;
+});