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This theme_support version has been updated by Damien Le Berrigaud for Rails 2.0
It was then forked for Rails 2.2 (and later 2.3) support by James Stewart -
Some notes on the integration of Rails 2.3 support can be found at:
= Theme Support for Rails Applications
This plugin provides support for themes to the rails application environment.
It supports theme specific images, stylesheets, javascripts, and views. The
views can be in ERb (rhtml) or liquid formats. Optionally, you can configure
the theme system to ignore any templates except liquid ones.
== Creating a Theme using Theme Support ==
This plugin automatically makes any patches needed for theme support. Use the following command to create the file structure needed (replace YOUR_THEME_NAME with the name of your theme):
script/generate theme YOUR_THEME_NAME
The following theme folder structure will generate in your app code:
views/ <- you can override application views
layouts/ <- layout .rhtml or .liquid templates
When run in production mode, it will automatically cache the theme files so that
the web-server will deliver them in subsequent requests.
It bears noting that, like Typo, this will mean your apache/fcgi process will need
write permissions. This could be a possible security vulnerability. For those of us using passanger and mongrels, more information will follow.
With that in mind, it is best to pre-cache all of the theme files by using the
included rake tasks:
$ rake theme_create_cache
The theme file cache generates the following file structure:
There are other rake tasks available:
- theme_create_cache
- theme_remove_cache
- theme_update_cache
== Using your new Theme in your app code ==
You specify which theme to use in your controller by using the 'theme' helper.
It's used just like the 'layout' helper. In fact, you can use them both
simultaneously. The following will render actions using the 'application' layout
in the 'blue_bird' theme (theme/blue_bird/views/layouts/application.html.erb):
class ApplicationController < ActionController::Base
layout 'application'
theme 'blue_bird'
You can also defer the theme lookup to a controller method:
class ApplicationController < ActionController::Base
layout 'application'
theme :get_theme
def get_theme
# If you let the user choose their own theme, you might
# add a User#theme field...
Note: By setting the theme in the ApplicationController you can set
the theme for the whole application.
== Using themes in your Views ==
In your application views, there are theme specific helper tags
available to you.
- theme_image_tag
- theme_image_path
- theme_javascript_include_tag
- theme_javascript_path
- theme_stylesheet_link_tag
- theme_stylesheet_path
ERB Example :
# Note my theme is called "blue_bird" and my css file is called "style.css"
<%= theme_stylesheet_link_tag 'blue_bird', 'style' %>
Liquid templates there is a single helper, themeitem, that will determine
the path base on the theme file extension. Here's how you'd use it:
<link rel="StyleSheet" href="{% themeitem %} default.css {% endthemeitem %}" />
<img src="{% themeitem %} logo.png {% endthemeitem %}" />
The output from those two calls are:
<link rel="StyleSheet" href="/themes/[current_theme]/stylesheets/default.css" />
<img src="/themes/[current_theme]/images/logo.png" />
== ActionMailer Support ==
New in version 1.4 is ActionMailer support. Note, this is still experimental. However,
if you would like your themes to be able to override your ActionMailer views, you can
send the theme in your deliver_* method call. For example, assuming we have an ActionMailer
class named Mailer, and have implemented theme_support as shown above, here's how you would
allowing themes in emails:
def send_email
Mailer.deliver_my_email( 'a variable', :theme=>get_theme )
== Contributors
The theme_support plugin includes patches from the following:
* agkr
* D.J. Vogel
Thanks guys!
== Changelog
1.5.0 - Using jystewart's fork of the original github theme_support, the helper methods should
work in Rails 2.2.2. ReadME fixed. Layouts changed to reflect Rails conventions: e.g.,
layouts are now under views, application.html.erb used to reflect standard naming
1.4.0 - Better support for Rails 1.1+. Updated the liquid themeitem tag.
Liquid layouts are no longer generated by default.Added a couple
of patches. One allows theme sub-directories. For example, you
can have:
Added experimental support for themeing ActionMailer classes.
They work as normal, if you want to all theme's to override the
.rhtml|.liquid views, send the theme in the deliver_* method. For
Mailer.deliver_signup( user, :theme=>get_theme() )
In that example, `get_theme` is a method on the controller and at
the top we've used:
layout 'default'
theme :get_theme
1.3.0 - The theme_system component is no longer needed. All of the
theme support is driven by a single plugin named, oddly enough,
'theme_support'. Also improved theme route support. Instead of
overriding RouteSet#reload, RouteSet#draw is overridden, making
the theme support entirely transparent -- hopefully ;-)
1.2.2 - More Bug-fixes.
1.2.1 - Bug-fixes and documentation clean up.
1.2.0 - Updated actionview_ex with the new render_file additions from
Typo. Renamed the rake tasks so that they all start with
'theme' (theme_create_cache, theme_remove_cache,
theme_update_cache). You can update the system files by running:
$ ./script/generate theme _system_
Full support for Liquid templates, as well as an option to only
allow Liquid templates in a theme.
1.1.1 - Added rake tasks for pre-caching the themes, and removing the
cached themes.
1.1.0 - [Breaking] Abstraction of the Typo theme system. The themes are
now the same as is used in Typo. The theme engine itself is a
combination of plugins and a component. No more symlinks, thank
1.0.2 - The current_theme is now retrieved from the controller. Where
symlinks are created on *nix systems, shortcuts are created
on Windows if Win32Utils is installed.
1.0.1 - Added 'themes' directory, theme definition file, and symlinks
to the appropriate directories on supported platforms.
1.0.0 - Initial release
Copyright (c) 2005 Matt McCray, based on code from Typo by Tobias Luetke
released under the MIT license
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