Changes to support Spoiler Alert plugin

app/assets/javascripts/discourse.js

@@ -208,6 +208,17 @@ Discourse = Ember.Application.createWithMixins(Discourse.Ajax, {
     }
   },
 
+  /**
+    Add an initializer hook for after the Discourse Application starts up.
+
+    @method addInitializer
+    @param {Function} init the initializer to add.
+  **/
+  addInitializer: function(init) {
+    Discourse.initializers = Discourse.initializers || [];
+    Discourse.initializers.push(init);
+  },
+
   /**
     Start up the Discourse application.
 
@@ -223,6 +234,12 @@ Discourse = Ember.Application.createWithMixins(Discourse.Ajax, {
     // Developer specific functions
     Discourse.Development.observeLiveChanges();
     Discourse.subscribeUserToNotifications();
+
+    if (Discourse.initializers) {
+      Discourse.initializers.forEach(function (init) {
+        init.call(this);
+      });
+    }
   }
 
 });

app/assets/javascripts/discourse/views/composer/composer_view.js

@@ -8,7 +8,7 @@
   @namespace Discourse
   @module Discourse
 **/
-Discourse.ComposerView = Discourse.View.extend({
+Discourse.ComposerView = Discourse.View.extend(Ember.Evented, {
   templateName: 'composer',
   elementId: 'reply-control',
   classNameBindings: ['model.creatingPrivateMessage:private-message',
@@ -49,18 +49,17 @@ Discourse.ComposerView = Discourse.View.extend({
   }.property('model.createdPost'),
 
   observeReplyChanges: function() {
-    var composerView = this;
+    var self = this;
     if (this.get('model.hidePreview')) return;
-    Ember.run.next(null, function() {
+    Ember.run.next(function() {
-      var $wmdPreview, caretPosition;
+      if (self.editor) {
-      if (composerView.editor) {
+        self.editor.refreshPreview();
-        composerView.editor.refreshPreview();
         // if the caret is on the last line ensure preview scrolled to bottom
-        caretPosition = Discourse.Utilities.caretPosition(composerView.wmdInput[0]);
+        var caretPosition = Discourse.Utilities.caretPosition(self.wmdInput[0]);
-        if (!composerView.wmdInput.val().substring(caretPosition).match(/\n/)) {
+        if (!self.wmdInput.val().substring(caretPosition).match(/\n/)) {
-          $wmdPreview = $('#wmd-preview');
+          var $wmdPreview = $('#wmd-preview');
           if ($wmdPreview.is(':visible')) {
-            return $wmdPreview.scrollTop($wmdPreview[0].scrollHeight);
+            $wmdPreview.scrollTop($wmdPreview[0].scrollHeight);
           }
         }
       }
@@ -129,8 +128,8 @@ Discourse.ComposerView = Discourse.View.extend({
 
     Discourse.SyntaxHighlighting.apply($wmdPreview);
 
-    var post = this.get('model.post');
+    var post = this.get('model.post'),
-    var refresh = false;
+        refresh = false;
 
     // If we are editing a post, we'll refresh its contents once. This is a feature that
     // allows a user to refresh its contents once.
@@ -146,6 +145,8 @@ Discourse.ComposerView = Discourse.View.extend({
     $('span.mention', $wmdPreview).each(function(i, e) {
       Discourse.Mention.load(e, refresh);
     });
+
+    this.trigger('previewRefreshed', $wmdPreview);
   }, 100),
 
   initEditor: function() {

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

@@ -6,7 +6,7 @@
   @namespace Discourse
   @module Discourse
 **/
-Discourse.PostView = Discourse.GroupedView.extend({
+Discourse.PostView = Discourse.GroupedView.extend(Ember.Evented, {
   classNames: ['topic-post', 'clearfix'],
   templateName: 'post',
   classNameBindings: ['postTypeClass',
@@ -193,8 +193,9 @@ Discourse.PostView = Discourse.GroupedView.extend({
   },
 
   didInsertElement: function() {
-    var $post = this.$();
+    var $post = this.$(),
-    var post = this.get('post');
+        post = this.get('post');
+
     this.showLinkCounts();
 
     // Track this post
@@ -204,6 +205,8 @@ Discourse.PostView = Discourse.GroupedView.extend({
     Discourse.SyntaxHighlighting.apply($post);
     Discourse.Lightbox.apply($post);
 
+    this.trigger('postViewInserted', $post);
+
     // Find all the quotes
     this.insertQuoteControls();
 

lib/plugin/instance.rb

@@ -102,7 +102,7 @@ class Plugin::Instance
 
   def automatic_assets
     css = ""
-    js = "(function(){"
+    js = ""
 
     css = @styles.join("\n") if @styles
     js = @javascripts.join("\n") if @javascripts
@@ -127,10 +127,14 @@ class Plugin::Instance
       end
     end
 
-    js << "})();"
+    # Generate an IIFE for the JS
+    js = "(function(){#{js}})();" if js.present?
 
-    # TODO don't serve blank assets
+    result = []
-    [[css,"css"],[js,"js"]].map do |asset, extension|
+    result << [css, 'css'] if css.present?
+    result << [js, 'js'] if js.present?
+
+    result.map do |asset, extension|
       hash = Digest::SHA1.hexdigest asset
       ["#{auto_generated_path}/plugin_#{hash}.#{extension}", asset]
     end