implement head.js

app/helpers/application_helper.rb

@@ -29,21 +29,6 @@ module ApplicationHelper
     !@hide_home_link
   end
   
-  JAVASCRIPT_LIBRARIES = {
-    :addthis => 'http://s7.addthis.com/js/250/addthis_widget.js#username=openneo',
-    :bitly => 'http://bit.ly/javascript-api.js?version=latest&login=openneo&apiKey=R_4d0438829b7a99860de1d3edf55d8dc8',
-    :html5 => 'http://html5shim.googlecode.com/svn/trunk/html5.js',
-    :jquery => 'http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js',
-    :jquery_tmpl => 'http://ajax.microsoft.com/ajax/jquery.templates/beta1/jquery.tmpl.min.js',
-    :swfobject => 'http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js'
-  }
-  
-  def include_javascript_libraries(*library_names)
-    raw(library_names.inject('') do |html, name|
-      html + javascript_include_tag(JAVASCRIPT_LIBRARIES[name])
-    end)
-  end
-  
   def login_path_with_return_to
     login_path :return_to => request.fullpath
   end

app/helpers/head_js_helper.rb

@@ -0,0 +1,51 @@
+module HeadJsHelper
+  JAVASCRIPT_LIBRARIES = {}
+  YAML.load_file(Rails.root.join('config', 'javascript_libraries.yml')).each do |name, src|
+    JAVASCRIPT_LIBRARIES[name.to_sym] = src
+  end
+  
+  def html5
+    content_for :html5, "<!--[if lt IE 9]>#{javascript_tag(JAVASCRIPT_LIBRARIES[:html5])}<![endif]-->".html_safe
+  end
+  
+  def javascript_chain(*javascripts)
+    # two-dimensional array: list of chains
+    @javascript_chains ||= []
+    @javascript_chains << javascripts
+  end
+  
+  def javascript_chains
+    if @javascript_chains
+      javascript_include_tag('head') + "\n" + javascript_chains_tag(@javascript_chains)
+    end
+  end
+  
+  def javascript_chain_line(chain)
+    chain_args = chain.map {
+      |script_name| javascript_library_path(script_name).inspect
+    }.join(', ')
+    "head.js(#{chain_args});"
+  end
+  
+  def javascript_chains_tag(chains)
+    output_js do |js|
+      chains.each do |chain|
+        js << javascript_chain_line(chain)
+      end
+    end
+  end
+  
+  private
+  
+  def javascript_library_path(script_name)
+    script_name.is_a?(Symbol) ? JAVASCRIPT_LIBRARIES[script_name] : javascript_path(script_name)
+  end
+  
+  def output_js(&block)
+    javascript_tag(safe_output(&block))
+  end
+  
+  def safe_output(&block)
+    [].tap(&block).join("\n").html_safe
+  end
+end

app/views/items/show.html.haml

@@ -1,3 +1,4 @@
+- javascript_chain :jquery, :swfobject, 'items/show'
 %header
   = image_tag @item.thumbnail_url, :id => 'item-thumbnail'
   %div
@@ -31,10 +32,4 @@
     Javascript and Flash are required to preview wearables. Sorry!
 
 :javascript
-  var CURRENT_ITEM_ZONES_RESTRICT = #{@item.zones_restrict.inspect},
+  var CURRENT_ITEM_ZONES_RESTRICT = #{@item.zones_restrict.inspect};
-    IMPRESS_HOST = #{RemoteImpressHost.inspect};
-
-- content_for :javascripts do
-  = javascript_include_tag 'http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js',
-    'http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js',
-    'items/show'

app/views/layouts/application.html.haml

@@ -6,11 +6,13 @@
       - if content_for? :title
         —
         = yield :title
+    = yield(:html5)
     = stylesheet_link_tag "compiled/screen"
     = csrf_meta_tag
     = signed_in_meta_tag
+    - javascript_chain 'analytics'
+    = javascript_chains
   %body{:class => body_class}
-    = javascript_include_tag "analytics"
     #container
       - if content_for? :title
         %h1#title= yield :title
@@ -60,4 +62,3 @@
         %p
           Images © 2000-2010 Neopets, Inc. All Rights Reserved.
           Used With Permission
-      = yield(:javascripts)

app/views/outfits/edit.html.haml

@@ -1,3 +1,5 @@
+- html5
+- javascript_chain :jquery, :swfobject, :jquery_tmpl, 'wardrobe', 'outfits/edit'
 - add_body_class 'fullscreen'
 %a#home-link{:href => "/"}
   %span Dress to Impress
@@ -105,8 +107,3 @@
     \/
     %a.outfit-delete-confirmation-no{:href => '#'} no, thanks
   </li>
-- content_for :javascripts do
-  /[if IE]
-    = include_javascript_libraries :html5
-  = include_javascript_libraries :jquery, :swfobject, :jquery_tmpl
-  = include_javascripts :edit_outfit_package

app/views/outfits/new.html.haml

@@ -1,4 +1,5 @@
 - hide_home_link
+- javascript_chain :jquery, 'wardrobe', 'pet_query', 'outfits/new'
 #outfit-forms
   #pet-preview
     = image_tag 'default_preview.png', :alt => ''
@@ -99,6 +100,3 @@
   = pet_name_tag
   %button{:type => "submit"}
     I pwn!
-- content_for :javascripts do
-  = include_javascript_libraries :jquery
-  = include_javascripts :new_outfit_package

app/views/outfits/show.html.haml

@@ -1,4 +1,5 @@
 - title @outfit.name
+- javascript_chain :jquery, :swfobject, 'wardrobe', 'outfits/show'
 %a.button#outfit-wardrobe-link{:href => wardrobe_path(:anchor => @outfit.to_query)}
   Edit a copy
 #outfit-user
@@ -9,8 +10,5 @@
 #preview-wrapper
   #preview-swf
 #outfit-items= render @outfit.worn_items
-- content_for :javascripts do
+:javascript
-  :javascript
   var INITIAL_OUTFIT_DATA = #{@outfit.to_json};
-  = include_javascript_libraries :jquery, :swfobject
-  = include_javascripts :show_outfit_package

app/views/pets/bulk.html.haml

@@ -1,3 +1,4 @@
+- javascript_chain :jquery, 'pet_query', 'pets/bulk'
 - unless user_signed_in?
   %p.warning
     = link_to 'You are not logged in!', login_path(:return_to => bulk_pets_path)
@@ -28,6 +29,3 @@
     %textarea
     %button#bulk-pets-form-add{:type => "button"} Add
     %button#bulk-pets-form-clear{:type => "button"} Clear
-- content_for :javascripts do
-  = include_javascript_libraries :jquery
-  = include_javascripts :bulk_pets_package

config/javascript_libraries.yml

@@ -0,0 +1,4 @@
+html5:         http://html5shim.googlecode.com/svn/trunk/html5.js
+jquery:        http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js
+jquery_tmpl:   http://ajax.microsoft.com/ajax/jquery.templates/beta1/jquery.tmpl.min.js
+swfobject:     http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js

public/javascripts/head.js

@@ -0,0 +1 @@
+(function(j){function k(a){var b=g[a.url||a];if(b)return b;if(typeof a=="object")for(var c in a){if(a[c])b={name:c,url:a[c]}}else b={name:a.substring(a.indexOf("/",10)+1,a.indexOf("?")),url:a};return g[b.url]=b}function e(a,b){if(a){if(typeof a=="object")a=[].slice.call(a);for(var c=0;c<a.length;c++)b.call(a,a[c],c)}}function h(a){return Object.prototype.toString.call(a)=="[object Function]"}function u(){e(arguments,function(a){h(a)||v(k(a))})}function n(a){a.state="preloaded";e(a.onpreload,function(b){b.call()})} function v(a){if(!a.state){a.state="preloading";a.onpreload=[];if(/Firefox/.test(navigator.userAgent)){var b=j.createElement("object");b.data=a.url;b.width=0;b.height=0;b.onload=function(){n(a);setTimeout(function(){i.removeChild(b)},1)};i.appendChild(b)}else o({src:a.url,type:"cache"},function(){n(a)})}}function l(a,b){if(a.state=="loaded")return b();if(a.state=="preloading")return a.onpreload.push(function(){l(a,b)});a.state="loading";o(a.url,function(){a.state="loaded";b&&b.call();e(m[a.name], function(f){f.call()});var c=true,p;for(p in g)if(g[p].state!="loaded")c=false;c&&e(q,function(f){f.done||f.call();f.done=true})})}function o(a,b){var c=j.createElement("script");c.type="text/"+(a.type||"javascript");c.src=a.src||a;c.onreadystatechange=c.onload=function(){if(!b.done){b.call();b.done=true}document.all||i.removeChild(c)};i.appendChild(c)}var i=j.documentElement,r=false,s=[],q=[],m={},g={},t=window.head_conf&&head_conf.head||"head",d=window[t]=window[t]||{};d.js=function(){var a=arguments, b=[].slice.call(a,1),c=b[0];if(!r){s.push(function(){d.js.apply(null,a)});return d}if(c){h(c)||u.apply(null,b);l(k(a[0]),h(c)?c:function(){d.js.apply(null,b)})}else l(k(a[0]));return d};d.ready=function(a,b){if(h(a))return q.push(a);var c=m[a];if(c)c.push(b);else m[a]=[b];return d};setTimeout(function(){r=true;e(s,function(a){a.call()})},200)})(document);

public/javascripts/items/show.js

@@ -20,10 +20,6 @@ String.prototype.article = function () {
   return 'aeiou'.indexOf(this.charAt(0).toLowerCase()) == -1 ? 'a' : 'an'
 }
 
-function impressUrl(path) {
-  return 'http://' + IMPRESS_HOST + path;
-}
-
 function LoadError(base_msg) {
   this.render = function (args) {
     var msg = base_msg, token, article_token;
@@ -36,7 +32,7 @@ function LoadError(base_msg) {
       msg = msg.replace(token, args[i]);
     }
     return "Whoops - we've never seen " + msg + " before! If you have, please " +
-    "<a href='http://" + IMPRESS_HOST + "'>submit that pet's name</a> as soon as you " +
+    "<a href='/'>submit that pet's name</a> as soon as you " +
     "get the chance! Thanks!";
   }
 }
@@ -76,7 +72,7 @@ function PetType() {
     speciesList.filter('.current').removeClass('current');
     this.link.addClass('current');
     customize_more_el.attr('href',
-      'http://impress.openneo.net/wardrobe?species=' + this.species_id + 
+      '/wardrobe#species=' + this.species_id + 
       '&color=' + this.color_id + '&objects[]=' + Item.current.id);
     if(this.activated) {
       Preview.enable();
@@ -222,7 +218,7 @@ Preview = new function Preview() {
       '100%', // width
       '100%', // height
       '9', // required version
-      impressUrl('/assets/js/swfobject/expressInstall.swf'), // express install URL
+      null, // express install URL
       {}, // flashvars
       {'wmode': 'transparent', 'allowscriptaccess': 'always'} // params
     );