1 files changed, 32 insertions, 4 deletions

diff --git a/lib/page/html.js b/lib/page/html.js
index f828d11..b19d5ed 100644
--- a/lib/page/html.js
+++ b/lib/page/html.js
@@ -4,6 +4,7 @@ var domSerializer = require('dom-serializer');
 var slug = require('github-slugid');
 
 var Promise = require('../utils/promise');
+var location = require('../utils/location');
 
 // Render a cheerio DOM as html
 function renderDOM($, dom, options) {
@@ -18,7 +19,10 @@ function HTMLPipeline(htmlString, opts) {
     _.bindAll(this);
 
     this.opts = _.defaults(opts || {}, {
-        convertImages: true
+        convertImages: true,
+
+        // Calcul new href for a relative link
+        onRelativeLink: _.identity
     });
 
     this.$ = cheerio.load(htmlString, {
@@ -31,15 +35,38 @@ function HTMLPipeline(htmlString, opts) {
     });
 }
 
+// Normalize links
+HTMLPipeline.prototype.normalizeLinks = function() {
+    var that = this;
+
+    this.$('a').each(function() {
+        var $a = that.$(this);
+
+        var href = $a.attr('href');
+        if (!href) return;
+
+        if (location.isAnchor(href)) {
+            // Don't "change" anchor links
+        } else if (location.isRelative(href)) {
+            $a.attr('href', that.opts.onRelativeLink(href));
+        } else {
+            // External links
+            $a.attr('target', '_blank');
+        }
+
+    });
+};
+
 // Add ID to headings
 HTMLPipeline.prototype.addHeadingIDs = function() {
     var that = this;
 
     this.$('h1,h2,h3,h4,h5,h6').each(function() {
-        // Already has an ID?
-        if (that.$(this).attr('id')) return;
+        var $h = that.$(this);
 
-        that.$(this).attr('id', slug(that.$(this).text()));
+        // Already has an ID?
+        if ($h.attr('id')) return;
+        $h.attr('id', slug($h.text()));
     });
 };
 
@@ -48,6 +75,7 @@ HTMLPipeline.prototype.output = function() {
     var that = this;
 
     return Promise()
+    .then(this.normalizeLinks)
     .then(this.addHeadingIDs)
     .then(function() {
         return renderDOM(that.$);