Chris@909: # Redmine - project management software
Chris@909: # Copyright (C) 2006-2011  Jean-Philippe Lang
Chris@909: #
Chris@909: # This program is free software; you can redistribute it and/or
Chris@909: # modify it under the terms of the GNU General Public License
Chris@909: # as published by the Free Software Foundation; either version 2
Chris@909: # of the License, or (at your option) any later version.
Chris@909: #
Chris@909: # This program is distributed in the hope that it will be useful,
Chris@909: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@909: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@909: # GNU General Public License for more details.
Chris@909: #
Chris@909: # You should have received a copy of the GNU General Public License
Chris@909: # along with this program; if not, write to the Free Software
Chris@909: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@909: 
Chris@909: module Redmine
Chris@909:   module Themes
Chris@909: 
Chris@909:     # Return an array of installed themes
Chris@909:     def self.themes
Chris@909:       @@installed_themes ||= scan_themes
Chris@909:     end
Chris@909: 
Chris@909:     # Rescan themes directory
Chris@909:     def self.rescan
Chris@909:       @@installed_themes = scan_themes
Chris@909:     end
Chris@909: 
Chris@909:     # Return theme for given id, or nil if it's not found
Chris@909:     def self.theme(id, options={})
Chris@909:       return nil if id.blank?
Chris@909: 
Chris@909:       found = themes.find {|t| t.id == id}
Chris@909:       if found.nil? && options[:rescan] != false
Chris@909:         rescan
Chris@909:         found = theme(id, :rescan => false)
Chris@909:       end
Chris@909:       found
Chris@909:     end
Chris@909: 
Chris@909:     # Class used to represent a theme
Chris@909:     class Theme
Chris@909:       attr_reader :path, :name, :dir
Chris@909: 
Chris@909:       def initialize(path)
Chris@909:         @path = path
Chris@909:         @dir = File.basename(path)
Chris@909:         @name = @dir.humanize
Chris@909:         @stylesheets = nil
Chris@909:         @javascripts = nil
Chris@909:       end
Chris@909: 
Chris@909:       # Directory name used as the theme id
Chris@909:       def id; dir end
Chris@909: 
Chris@909:       def ==(theme)
Chris@909:         theme.is_a?(Theme) && theme.dir == dir
Chris@909:       end
Chris@909: 
Chris@909:       def <=>(theme)
Chris@909:         name <=> theme.name
Chris@909:       end
Chris@909: 
Chris@909:       def stylesheets
Chris@909:         @stylesheets ||= assets("stylesheets", "css")
Chris@909:       end
Chris@909: 
Chris@909:       def javascripts
Chris@909:         @javascripts ||= assets("javascripts", "js")
Chris@909:       end
Chris@909: 
Chris@909:       def stylesheet_path(source)
Chris@909:         "/themes/#{dir}/stylesheets/#{source}"
Chris@909:       end
Chris@909: 
Chris@909:       def javascript_path(source)
Chris@909:         "/themes/#{dir}/javascripts/#{source}"
Chris@909:       end
Chris@909: 
Chris@909:       private
Chris@909: 
Chris@909:       def assets(dir, ext)
Chris@909:         Dir.glob("#{path}/#{dir}/*.#{ext}").collect {|f| File.basename(f).gsub(/\.#{ext}$/, '')}
Chris@909:       end
Chris@909:     end
Chris@909: 
Chris@909:     private
Chris@909: 
Chris@909:     def self.scan_themes
Chris@909:       dirs = Dir.glob("#{Rails.public_path}/themes/*").select do |f|
Chris@909:         # A theme should at least override application.css
Chris@909:         File.directory?(f) && File.exist?("#{f}/stylesheets/application.css")
Chris@909:       end
Chris@909:       dirs.collect {|dir| Theme.new(dir)}.sort
Chris@909:     end
Chris@909:   end
Chris@909: end
Chris@909: 
Chris@909: module ApplicationHelper
Chris@909:   def current_theme
Chris@909:     unless instance_variable_defined?(:@current_theme)
Chris@909:       @current_theme = Redmine::Themes.theme(Setting.ui_theme)
Chris@909:     end
Chris@909:     @current_theme
Chris@909:   end
Chris@909: 
Chris@909:   def stylesheet_path(source)
Chris@909:     if current_theme && current_theme.stylesheets.include?(source)
Chris@909:       super current_theme.stylesheet_path(source)
Chris@909:     else
Chris@909:       super
Chris@909:     end
Chris@909:   end
Chris@909: 
Chris@909:   def path_to_stylesheet(source)
Chris@909:     stylesheet_path source
Chris@909:   end
Chris@909: 
Chris@909:   # Returns the header tags for the current theme
Chris@909:   def heads_for_theme
Chris@909:     if current_theme && current_theme.javascripts.include?('theme')
Chris@909:       javascript_include_tag current_theme.javascript_path('theme')
Chris@909:     end
Chris@909:   end
Chris@909: end