h1. Theme For Rails (3 and hopefully later)

h2. Features list / Wish list

* Support for adding themes which includes stylesheets, javascripts, views and layouts. 

<pre>
$app_root
  themes/
    [theme_name]
      images/
      stylesheets/
      javascripts/
      views/           <- you can override application views
        layouts/         <- layout .rhtml or .liquid templates
</pre>

h2. Instructions

Add themes_for_rails to your Gemfile.

<pre>
gem 'themes_for_rails'
</pre>

Add themes_for_rails to your config/routes.rb

<pre>
MySuperDuperApp::Application.routes.draw do
  # ...
  themes_for_rails
  # ...
end
</pre>

h3. And then?

Now you'll be able to use themes like this:

Inside method, for some explicit action:

<pre>
class MyController < ApplicationController
  def show
    theme "purple"
  end
end
</pre>

Or at class level definition, in order to set a theme for more than one action. I think this is is prettier, and less invasive. 

<pre>
class MyController < ApplicationController
  theme "purple" # all actions will use this theme
  def show
    ...
  end
end
</pre>

You could also enable a theme for some actions only

<pre>
class MyController < ApplicationController
  theme "purple", :only => :show
  def show
    # with theme
  end
  def edit
    # no theme
  end
end
</pre>

As a plus, you could do this to defer theme name resolution to a method: 

<pre>
class MyController < ApplicationController
  theme :theme_resolver
  # ...
private
  def theme_resolver
    current_user.theme # or anything else that return a string. 
  end
end
</pre>

As a general rule, when passing a String, that becomes the theme name, but when a Symbol is sent, it gets treated as method message. 

h3. Url Helpers

In your views you should be able to access your assets like this (given the theme 'default' is set):

<pre>
current_theme_image_path('logo.png')   # => /themes/default/images/logo.png
current_theme_stylesheet_path('style') # => /themes/default/stylesheets/logo.css
current_theme_javascript_path('app')   # => /themes/default/stylesheets/app.js
</pre>

Or a given theme:

<pre>
current_theme_image_path('logo.png', 'purple')   # => /themes/purple/images/logo.png
</pre>

In your application views, there are theme specific helper tags 
available to you. For ERb templates they are:

<pre>
theme_image_tag
theme_image_path
theme_javascript_include_tag
theme_javascript_path
theme_stylesheet_link_tag
theme_stylesheet_path  
</pre>

h2. Generators

For now, it only creates the theme folder.

<pre>
rails generate theme_for_rails:install  
</pre>

Inside the themes folder, it create a structure for my_theme.

<pre>
rails generate theme_for_rails:theme my_theme  
</pre>

h2. Changing things

At least for now, you can change the ThemesForRails base dir in your app, in the corresponding environment file, or in your application.rb file. Do it like this:

<pre>
KillerApp::Application.configure do
  #
  
  config.themes_for_rails.base_dir = File.join(Rails.root, "skins")

  #...
end
</pre>

h2. Notes and Warnings.

If you are running an app in production mode, and you get the static files with no content, is because you don't have X-senfile enabled at your web server. 

You can do two things:

comment out this line in your production.rb file:

config.action_dispatch.x_sendfile_header = "X-Sendfile"

or 

configure your web server to use it. :)


h2. Documentation

"Read it here":http://rubydoc.info/github/lucasefe/themes_for_rails/master/frames

h2. Ideas

* Add ThemesForRails::Railtie for configuration, so we selectively set the plugin on or off. Also to be able to change several settings. 
* -Add routes to allow access to the theme's static resources (js and cs), unless cached on public folder by capistrano / rake.-
* -Extend Action View path in order to make the views accessible. Same for the layouts.-
* More tests ford edge cases. Now I am only testing the happy paths. 

h2. Things to remember.

* -Final version should be a gem. Initialization hooks doesn't work when using this as a plugin (vendor/plugins).-
* -Research about testing this kind of gem. I really don't have a clue.- Testing in place!
* I should probably load the theme list at start time, to be able to consult it as needed. I am gonna need that when dealing with runtime  theme selection. Many themes are going to be used simultaneously, so I have to be able to switch view paths as fast as I can. 

h2. Rails 2 Support

This gem only works with Rails 3 (duh). If you want the same exactly behavior, but for Rails 2.x, go "here":http://github.com/jystewart/theme_support .


h2. Running tests

<pre>
gem install bundler
bundle install
rake
</pre>

h2. Authors and contributors

* lucasefe