split sprite map class into modules for easy reading it was way to long
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Scott Davis
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@ -9,6 +9,8 @@ module Compass
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end
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require 'compass/sass_extensions/sprites/image'
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require 'compass/sass_extensions/sprites/sprite_methods'
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require 'compass/sass_extensions/sprites/image_methods'
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require 'compass/sass_extensions/sprites/sprite_map'
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require 'compass/sass_extensions/sprites/engines'
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@ -2,6 +2,11 @@ module Compass
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module SassExtensions
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module Sprites
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class SpriteMap < Sass::Script::Literal
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attr_accessor :image_names, :path, :name, :map, :kwargs
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attr_accessor :images, :width, :height
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include SpriteMethods
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include ImageMethods
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# Initialize a new sprite object from a relative file path
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@ -14,19 +19,6 @@ module Compass
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new(sprites, importer.path, importer.name, context, kwargs)
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end
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# Loads the sprite engine
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def require_engine!
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self.class.send(:include, eval("::Compass::SassExtensions::Sprites::#{modulize}Engine"))
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end
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# Changing this string will invalidate all previously generated sprite images.
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# We should do so only when the packing algorithm changes
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SPRITE_VERSION = "1"
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attr_accessor :image_names, :path, :name, :kwargs
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attr_accessor :images, :width, :height
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def initialize(sprites, path, name, context, kwargs)
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require_engine!
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@image_names = sprites
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@ -42,143 +34,9 @@ module Compass
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compute_image_metadata!
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end
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# Calculate the size of the sprite
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def size
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[width, height]
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end
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# Calculates the overal image dimensions
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# collects image sizes and input parameters for each sprite
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# Calculates the height
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def compute_image_metadata!
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@width = 0
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init_images
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compute_image_positions!
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@height = @images.last.top + @images.last.height
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end
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# Creates the Sprite::Image objects for each image and calculates the width
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def init_images
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@images = image_names.collect do |relative_file|
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image = Compass::SassExtensions::Sprites::Image.new(self, relative_file, kwargs)
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@width = [ @width, image.width + image.offset ].max
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image
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end
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end
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# Calculates the overal image dimensions
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# collects image sizes and input parameters for each sprite
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def compute_image_positions!
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@images.each_with_index do |image, index|
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image.left = image.position.unit_str == "%" ? (@width - image.width) * (image.position.value / 100) : image.position.value
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next if index == 0
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last_image = @images[index-1]
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image.top = last_image.top + last_image.height + [image.spacing, last_image.spacing].max
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end
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end
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# Fetches the Sprite::Image object for the supplied name
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def image_for(name)
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@images.detect { |img| img.name == name}
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end
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# Returns true if the image name has a hover selector image
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def has_hover?(name)
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!image_for("#{name}_hover").nil?
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end
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# Returns true if the image name has a target selector image
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def has_target?(name)
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!image_for("#{name}_target").nil?
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end
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# Returns true if the image name has an active selector image
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def has_active?(name)
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!image_for("#{name}_active").nil?
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end
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# Return and array of image names that make up this sprite
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def sprite_names
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image_names.map { |f| File.basename(f, '.png') }
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end
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# Validates that the sprite_names are valid sass
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def validate!
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for sprite_name in sprite_names
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unless sprite_name =~ /\A#{Sass::SCSS::RX::IDENT}\Z/
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raise Sass::SyntaxError, "#{sprite_name} must be a legal css identifier"
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end
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end
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end
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# The on-the-disk filename of the sprite
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def filename
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File.join(Compass.configuration.images_path, "#{path}-s#{uniqueness_hash}.png")
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end
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# Generate a sprite image if necessary
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def generate
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if generation_required?
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if kwargs.get_var('cleanup').value
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cleanup_old_sprites
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end
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sprite_data = construct_sprite
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save!(sprite_data)
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Compass.configuration.run_callback(:sprite_generated, sprite_data)
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end
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end
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def cleanup_old_sprites
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Dir[File.join(Compass.configuration.images_path, "#{path}-*.png")].each do |file|
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FileUtils.rm file
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end
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end
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# Does this sprite need to be generated
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def generation_required?
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!File.exists?(filename) || outdated?
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end
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# Returns the uniqueness hash for this sprite object
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def uniqueness_hash
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@uniqueness_hash ||= begin
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sum = Digest::MD5.new
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sum << SPRITE_VERSION
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sum << path
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images.each do |image|
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[:relative_file, :height, :width, :repeat, :spacing, :position, :digest].each do |attr|
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sum << image.send(attr).to_s
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end
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end
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sum.hexdigest[0...10]
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end
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@uniqueness_hash
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end
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# Saves the sprite engine
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def save!(output_png)
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saved = output_png.save filename
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Compass.configuration.run_callback(:sprite_saved, filename)
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saved
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end
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# All the full-path filenames involved in this sprite
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def image_filenames
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@images.map(&:file)
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end
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# Checks whether this sprite is outdated
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def outdated?
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if File.exists?(filename)
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return @images.map(&:mtime).any? { |imtime| imtime.to_i > self.mtime.to_i }
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end
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true
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end
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# Mtime of the sprite file
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def mtime
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@mtime ||= File.mtime(filename)
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# Loads the sprite engine
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def require_engine!
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self.class.send(:include, eval("::Compass::SassExtensions::Sprites::#{modulize}Engine"))
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end
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def inspect
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