Class: ActiveAssets::ActiveSprites::Sprites

Inherits:
Object
  • Object
show all
Includes:
Configurable, ActiveSupport::Configurable
Defined in:
lib/active_assets/active_sprites/sprites.rb

Instance Method Summary collapse

Constructor Details

#initializeSprites

Returns a new instance of Sprites.



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# File 'lib/active_assets/active_sprites/sprites.rb', line 10

def initialize
  @sprites = Hash.new do |sprites, name|
    sprites[name] = Sprite.new
  end
end

Instance Method Details

#[](name) ⇒ Object



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# File 'lib/active_assets/active_sprites/sprites.rb', line 43

def [](name)
  return nil unless @sprites.has_key?(name)
  @sprites[name]
end

#allObject



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# File 'lib/active_assets/active_sprites/sprites.rb', line 21

def all
  @sprites.values
end

#clearObject



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# File 'lib/active_assets/active_sprites/sprites.rb', line 48

def clear
  @sprites.clear
end

#describe(&blk) ⇒ Object



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# File 'lib/active_assets/active_sprites/sprites.rb', line 16

def describe(&blk)
  instance_eval(&blk) if block_given?
  self
end

#generate!(railtie = Rails.application) ⇒ Object



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# File 'lib/active_assets/active_sprites/sprites.rb', line 52

def generate!(railtie = Rails.application)
  begin
    case sprite_backend
    when :rmagick
      require 'rmagick'
      RmagickRunner.new(railtie, @sprites).generate!
    when :mini_magick
      require 'mini_magick'
      MiniMagickRunner.new(railtie, @sprites).generate!
    when :chunky_png, :oily_png
      begin
        require 'oily_png'
        ChunkyPngRunner.new(railtie, @sprites).generate!
      rescue LoadError
        require 'chunky_png'
        ChunkyPngRunner.new(railtie, @sprites).generate!
      end
    else
      begin
        require 'rmagick'
        RmagickRunner.new(railtie, @sprites).generate!
      rescue LoadError
        begin
          begin
            require 'oily_png'
            ChunkyPngRunner.new(railtie, @sprites).generate!
          rescue LoadError
            require 'chunky_png'
            ChunkyPngRunner.new(railtie, @sprites).generate!
          end
        rescue LoadError
          require 'mini_magick'
          MiniMagickRunner.new(railtie, @sprites).generate!
        end
      end
    end
  rescue LoadError => e
    msg = ''
    msg << "You have not specified any sprite runtime in your configuration.  We tried to load all supported runtimes, but failed to load any." if !sprite_backend
    msg << "Your requested backend, #{sprite_backend}, was not found." if sprite_backend
    msg << " Supported sprite backends include :rmagick, :chunky_png, and :mini_magick.  To use oily_png, install oily_png and configure with :chunky_png.\n"
    $stdout << msg
  end
end

#sprite(*args, &blk) ⇒ Object



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# File 'lib/active_assets/active_sprites/sprites.rb', line 25

def sprite(*args, &blk)
  sprite_path, stylesheet_path, options, as =
  case args.first
  when Hash
    options = args.shift
    args = *options.find {|k,v| k.is_a?(String) }
    (args << options).tap {|a| a.last.delete(a.first)}
  when Symbol
    # todo make default paths configurable
    ["sprites/#{args.first.to_s}.png", "sprites/#{args.first.to_s}.css", args.extract_options!, args.first]
  when String
    path = args.first
    [path, "#{File.dirname(path)}/#{File.basename(path, File.extname(path))}.css", args.extract_options!]
  end
  options.reverse_merge!(:as => as)
  @sprites[options[:as] || sprite_path].configure(sprite_path, stylesheet_path, options, &blk)
end