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

#initialize ⇒ Sprites

Returns a new instance of Sprites.



10
11
12
13
14
 
# 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 



43
44
45
46
 
# File 'lib/active_assets/active_sprites/sprites.rb', line 43

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

#all ⇒ Object 



21
22
23
 
# File 'lib/active_assets/active_sprites/sprites.rb', line 21

def all
  @sprites.values
end

#clear ⇒ Object 



48
49
50
 
# File 'lib/active_assets/active_sprites/sprites.rb', line 48

def clear
  @sprites.clear
end

#describe(&blk) ⇒ Object 



16
17
18
19
 
# 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 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
 
# 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 



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# 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