basic lightbox support

app/assets/javascripts/discourse.js.coffee

@@ -134,6 +134,7 @@ window.Discourse = Ember.Application.createWithMixins
       return if href is '#'
       return if $currentTarget.attr('target')
       return if $currentTarget.data('auto-route')
+      return if $currentTarget.hasClass('lightbox')
       return if href.indexOf("mailto:") is 0
 
       if href.match(/^http[s]?:\/\//i) && !href.match new RegExp("^http:\\/\\/" + window.location.hostname,"i")

app/assets/javascripts/discourse/components/click_track.js.coffee

@@ -6,6 +6,8 @@ window.Discourse.ClickTrack =
 
     $a = $(e.currentTarget)
 
+    return if $a.hasClass('lightbox')
+
     e.preventDefault()
 
     # We don't track clicks on quote back buttons

app/assets/javascripts/discourse/components/lightbox.js.coffee

@@ -0,0 +1,8 @@
+# Helper object for light boxes. Uses highlight.js which is loaded
+# on demand.
+window.Discourse.Lightbox =
+
+  apply: ($elem) ->
+    $('a.lightbox', $elem).each (i, e) =>
+      $LAB.script("/javascripts/jquery.colorbox-min.js").wait ->
+        $(e).colorbox()

app/assets/javascripts/discourse/views/post_view.js.coffee

@@ -212,6 +212,7 @@ window.Discourse.PostView = Ember.View.extend
 
     # Add syntax highlighting
     Discourse.SyntaxHighlighting.apply($post)
+    Discourse.Lightbox.apply($post)
 
     # If we're scrolling upwards, adjust the scroll position accordingly
     if scrollTo = @get('post.scrollTo')