Redmine

# redMine - project management software

# Copyright (C) 2006-2007  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

# 

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

module Redmine

  module Themes

    # Return an array of installed themes

    def self.themes

      @@installed_themes ||= scan_themes

    end

    # Rescan themes directory

    def self.rescan

      @@installed_themes = scan_themes

    end

    # Return theme for given id, or nil if it's not found

    def self.theme(id)

      themes.find {|t| t.id == id}

    end

    # Class used to represent a theme

    class Theme

      attr_reader :name, :dir, :stylesheets, :images, :javascripts

      def initialize(path)

        @dir = File.basename(path)

        @name = @dir.humanize

        @stylesheets = Dir.glob("#{path}/stylesheets/*.css").collect {|f| File.basename(f).gsub(/\.css$/, '')}

        @javascripts = Dir.glob("#{path}/javascripts/*.js").collect {|f| File.basename(f).gsub(/\.js$/, '')}

        @images      = Dir.glob("#{path}/images/*.*").collect {|f| File.basename(f)}

      end

      # Directory name used as the theme id

      def id; dir end

      def <=>(theme)

        name <=> theme.name

      end

    end

    private

    def self.scan_themes

      dirs = Dir.glob("#{RAILS_ROOT}/public/themes/*").select do |f|

        # A theme should at least override application.css

        File.directory?(f) && File.exist?("#{f}/stylesheets/application.css")

      end

      dirs.collect {|dir| Theme.new(dir)}.sort

    end

  end

end

module ApplicationHelper

  def stylesheet_path(source)

    @current_theme ||= Redmine::Themes.theme(Setting.ui_theme)

    super((@current_theme && @current_theme.stylesheets.include?(source)) ?

      "/themes/#{@current_theme.dir}/stylesheets/#{source}" : source)

  end

  def path_to_stylesheet(source)

    stylesheet_path source

  end

  def image_path(source)

    @current_theme ||= Redmine::Themes.theme(Setting.ui_theme)

    super((@current_theme && @current_theme.images.include?(source)) ?

      "/themes/#{@current_theme.dir}/images/#{source}" : source)

  end

  def path_to_image(source)

    image_path source    

  end

  def javascript_path(source)

    @current_theme ||= Redmine::Themes.theme(Setting.ui_theme)

    super((@current_theme && @current_theme.javascripts.include?(source)) ?

      "/themes/#{@current_theme.dir}/javascripts/#{source}" : source)

  end

  def path_to_javascript(source)

    javascript_path source

  end

  # or if we wanted to 'catch all' and allow the theme to have it's own version of anything in public

  # we could have just have compute_public_path look in the theme first

  # def compute_public_path(source, dir, ext = nil, include_host = true)

  # end

end