Only shorten feeds at occurrences of delimiters

README.md

@@ -28,10 +28,14 @@ feed:
   limit: 20
   hub:
   content:
+  content_limit: 140
+  content_limit_delim: [".", ":", ",", " "]
 ```
 
 - **type** - Feed type. (atom/rss2)
 - **path** - Feed path. (Default: atom.xml/rss2.xml)
 - **limit** - Maximum number of posts in the feed (Use `0` or `false` to show all posts)
 - **hub** - URL of the PubSubHubbub hubs (Leave it empty if you don't use it)
 - **content** - (optional) set to 'true' to include the contents of the entire post in the feed.
+- **content_limit** - (optional) Default length of post content used in summary. Only used, if **content** setting is false and no custom post description present.
+- **content_limit_delim** - (optional) A list of delimiters used to shorten the post content to a feed summary, if **content_limit** is set. If any of the contained delimiters is contained in the post content, cut at its occurence instead of the exact position according to **content_limit**. Delimiters in the list are probed in order for occurrence in the post content. Not used by default.

atom.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<feed xmlns="http://www.w3.org/2005/Atom">
+<feed xmlns="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/">
   <title>{{ config.title }}</title>
   {% if config.subtitle %}<subtitle>{{ config.subtitle }}</subtitle>{% endif %}
   <link href="{{ feed_url | uriencode }}" rel="self"/>
@@ -30,7 +30,11 @@
     {% elif post.excerpt %}
       {{ post.excerpt }}
     {% elif post.content %}
-      {{ post.content.substring(0, 140) }}
+       {% if not config.feed.content and config.feed.content_limit %}
+         {{ post.feedShortContent }}
+       {% else %}
+         {{ post.content }}
+       {% endif %}
     {% endif %}
     </summary>
     {% for category in post.categories.toArray() %}
@@ -39,6 +43,9 @@
     {% for tag in post.tags.toArray() %}
       <category term="{{ tag.name }}" scheme="{{ (url + tag.path) | uriencode }}"/>
     {% endfor %}
+    {% if post.thumbnail %}
+        <media:thumbnail url="{{ (url + post.thumbnail) | uriencode }}" width="48" height="48" />
+    {% endif %}
   </entry>
   {% endfor %}
 </feed>

index.js

@@ -8,7 +8,9 @@ var config = hexo.config.feed = assign({
   type: 'atom',
   limit: 20,
   hub: '',
-  content: true
+  content: true,
+  content_limit: 140,
+  content_limit_delim: ''
 }, hexo.config.feed);
 
 var type = config.type.toLowerCase();

lib/generator.js

@@ -4,6 +4,7 @@ var nunjucks = require('nunjucks');
 var env = new nunjucks.Environment();
 var pathFn = require('path');
 var fs = require('fs');
+var hexoutil = require('hexo-util');
 
 env.addFilter('uriencode', function(str) {
   return encodeURI(str);
@@ -21,6 +22,25 @@ module.exports = function(locals) {
 
   var posts = locals.posts.sort('-date');
   if (feedConfig.limit) posts = posts.limit(feedConfig.limit);
+
+  if (typeof feedConfig.content_limit != 'undefined') {
+	  posts.forEach(function(post) {
+		  var safe_content = hexoutil.stripHTML(post.content);
+		  post.feedShortContent = safe_content.substring(0, feedConfig.content_limit);
+
+		  if (typeof feedConfig.content_limit_delim != 'undefined') {
+			var delim_pos = -1;
+			for (var ind in feedConfig.content_limit_delim) {
+				var delim = feedConfig.content_limit_delim[ind];
+				delim_pos = post.feedShortContent.lastIndexOf(delim);
+				if (delim_pos > -1) {
+					post.feedShortContent = post.feedShortContent.substring(0, delim_pos+1);
+					break;
+				}
+			}
+		  }
+	  });
+  }
 
   var url = config.url;
   if (url[url.length - 1] !== '/') url += '/';

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hexo-generator-feed",
-  "version": "1.2.0",
+  "version": "1.2.2",
   "description": "Feed generator plugin for Hexo",
   "main": "index",
   "scripts": {

rss2.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <rss version="2.0"
   xmlns:atom="http://www.w3.org/2005/Atom"
-  xmlns:content="http://purl.org/rss/1.0/modules/content/">
+  xmlns:content="http://purl.org/rss/1.0/modules/content/"
+  xmlns:media="http://search.yahoo.com/mrss/">
   <channel>
     <title>{{ config.title }}</title>
     <link>{{ url | uriencode }}</link>
@@ -22,13 +23,24 @@
       {% elif post.excerpt %}
         {{ post.excerpt }}
       {% elif post.content %}
-        {{ post.content.substring(0, 140) }}
+       {% if not config.feed.content and config.feed.content_limit %}
+         {{ post.feedShortContent }}
+       {% else %}
+         {{ post.content }}
+       {% endif %}
       {% endif %}
       </description>
       {% if config.feed.content and post.content %}
       <content:encoded><![CDATA[{{ post.content | safe }}]]></content:encoded>
       {% endif %}
       {% if post.comments %}<comments>{{ (url + post.path) | uriencode }}#disqus_thread</comments>{% endif %}
+
+      {% if post.featured_image %}
+      <media:content medium="image" url="{{ (url + post.featured_image) | uriencode }}" />
+      {% endif %}
+      {% if post.thumbnail %}
+      <media:thumbnail url="{{ (url + post.thumbnail) | uriencode }}" width="48" height="48" />
+      {% endif %}
     </item>
     {% endfor %}
   </channel>