implemented most basic sprite usage without image generation

This commit is contained in:
Nico Hagenburger 2010-10-15 00:16:49 +02:00 committed by Chris Eppstein
parent f577da1d5e
commit 05b2695806
16 changed files with 156 additions and 614 deletions

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@ -13,17 +13,6 @@ module Compass::SassExtensions::Functions::ImageSize
Sass::Script::Number.new(height, ["px"])
end
private
def real_path(image_file)
path = image_file.value
# Compute the real path to the image on the file stystem if the images_dir is set.
if Compass.configuration.images_path
File.join(Compass.configuration.images_path, path)
else
File.join(Compass.configuration.project_path, path)
end
end
class ImageProperties
def initialize(file)
@file = file
@ -55,6 +44,17 @@ private
end
end
private
def real_path(image_file)
path = image_file.value
# Compute the real path to the image on the file stystem if the images_dir is set.
if Compass.configuration.images_path
File.join(Compass.configuration.images_path, path)
else
File.join(Compass.configuration.project_path, path)
end
end
class JPEG
attr_reader :width, :height, :bits

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@ -1,150 +1,11 @@
module Compass::SassExtensions::Functions::Sprites
include Compass::SassExtensions::Functions::ImageSize
class SpriteInfo
attr_reader :sprite
attr_reader :sprite_item
attr_reader :type
def initialize(sprite, sprite_item = nil, position_x = nil, position_y_shift = nil)
@sprite = sprite
@sprite_item = sprite_item
@position_x = position_x
@position_y_shift = position_y_shift
end
def position
x = @position_x || 0
if @sprite_item[:index] == 0 and (@position_y_shift.nil? or @position_y_shift.value == 0)
"#{x.inspect} 0"
else
expression = "Compass::Sprites.sprites['#{@sprite[:file]}'][:images][#{@sprite_item[:index]}][:y].unary_minus"
expression << ".plus(Sass::Script::Number.new(#{@position_y_shift.value}, ['px']))" if @position_y_shift
"#{x.inspect} <%= #{expression} %>"
end
end
end
def sprite_url(file)
dir, name, basename = extract_names(file)
sprite = sprite_for("#{dir}#{name}")
image_url(Sass::Script::String.new(sprite[:file]))
end
def sprite_position(file, position_x = nil, position_y_shift = nil, margin_top_or_both = nil, margin_bottom = nil)
sprite, sprite_item = sprite_url_and_position(file, position_x, position_y_shift, margin_top_or_both, margin_bottom)
info = SpriteInfo.new(sprite, sprite_item, position_x, position_y_shift)
Sass::Script::String.new(info.position)
end
def sprite_image(file, *args)
pos = sprite_position(file, *args)
url = sprite_url(file)
if pos.value == "0 0"
url
else
url.plus(" ").plus(pos)
end
end
alias_method :sprite_img, :sprite_image
def sprite_files_in_folder(folder)
assert_type folder, :String
count = sprite_file_list_from_folder(folder).length
Sass::Script::Number.new(count)
end
def sprite_file_from_folder(folder, n)
assert_type folder, :String
assert_type n, :Number
file = sprite_file_list_from_folder(folder)[n.to_i]
file = File.basename(file)
Sass::Script::String.new(File.join(folder.value, file))
end
def sprite_name(file)
dir, name, basename = extract_names(file)
Sass::Script::String.new(name)
end
def image_basename(file)
dir, name, basename = extract_names(file, :check_file => true)
Sass::Script::String.new(basename)
end
private
def sprite_file_list_from_folder(folder)
dir = File.join(Compass::Sprites.sprites_path, folder.value)
Dir.glob(File.join(dir, '*.png')).sort
end
def sprite_url_and_position(file, position_x = nil, position_y_shift = nil, margin_top_or_both = nil, margin_bottom = nil)
dir, name, basename = extract_names(file, :check_file => true)
filestr = File.join(Compass::Sprites.sprites_path, file.value)
sprite_file = "#{dir}#{name}.png"
sprite = sprite_for(sprite_file)
sprite_item = image_for(sprite, filestr, position_x, position_y_shift, margin_top_or_both, margin_bottom)
# Create a temporary destination file so compass doesn't complain about a missing image
FileUtils.touch File.join(Compass::Sprites.images_path, sprite_file) unless File.exists?(File.join(Compass::Sprites.images_path, sprite_file))
[sprite, sprite_item]
end
def extract_names(file, options = {})
assert_type file, :String
unless (file.value =~ %r(^(.+/)?([^\.]+?)(/(.+?)\.(png))?$)) == 0
raise Sass::SyntaxError, 'Please provide a file in a folder: e.g. sprites/button.png'
end
dir, name, basename = $1, $2, $4
if options[:check_file] and basename.nil?
raise Sass::SyntaxError, 'Please provide a file in a folder: e.g. sprites/button.png'
end
[dir, name, basename]
end
def sprite_for(file)
file = "#{file}.png" unless file =~ /\.png$/
Compass::Sprites.sprites[file] ||= {
:file => "#{file}",
:height => 0,
:width => 0,
:images => [],
:margin_bottom => 0
}
end
def image_for(sprite, file, position_x, position_y_shift, margin_top_or_both, margin_bottom)
image = sprite[:images].detect{ |image| image[:file] == file }
margin_top_or_both ||= Sass::Script::Number.new(0)
margin_top = margin_top_or_both.value #calculate_margin_top(sprite, margin_top_or_both, margin_bottom)
margin_bottom = (margin_bottom || margin_top_or_both).value
if image
image[:margin_top] = margin_top if margin_top > image[:margin_top]
image[:margin_bottom] = margin_bottom if margin_bottom > image[:margin_bottom]
else
width, height = ImageProperties.new(file).size
x = (position_x and position_x.numerator_units == %w(%)) ? position_x : Sass::Script::Number.new(0)
y = sprite[:height] + margin_top
y = Sass::Script::Number.new(y, y == 0 ? [] : ['px'])
image = {
:file => file,
:height => height,
:width => width,
:x => x,
:margin_top => margin_top,
:margin_bottom => margin_bottom,
:index => sprite[:images].length
}
sprite[:images] << image
end
image
rescue Errno::ENOENT
raise Sass::SyntaxError, "#{file} does not exist in sprites_dir #{Compass::Sprites.sprites_path}"
rescue ChunkyPNG::SignatureMismatch
raise Sass::SyntaxError, "#{file} is not a recognized png file, can't use for sprite creation"
def sprite_position(file)
name = File.dirname(file.value)
sprite = File.basename(file.value, '.png')
y = Compass::Sprites.sprites(name).detect{ |sprite_info| sprite_info[:name] == sprite }[:y]
y = "-#{y}px" unless y == 0
Sass::Script::String.new("0 #{y}")
end
end

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@ -1,3 +1,3 @@
%w(traversal sprites).each do |patch|
%w(traversal).each do |patch|
require "compass/sass_extensions/monkey_patches/#{patch}"
end

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@ -1,21 +0,0 @@
module Sass
module Tree
class RootNode < Node
alias_method :render_without_sprites, :render
def render
if result = render_without_sprites
Compass::Sprites.generate_sprites(options)
result = ERB.new(result).result(binding)
Compass::Sprites.reset
return result
end
end
end
end
end

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@ -1,112 +1,91 @@
require 'chunky_png'
module Compass::Sprites
@@sprites = {}
@@sprites_path = nil
@@images_path = nil
module Compass
class Sprites < Sass::Importers::Base
attr_accessor :name
class << self
class << self
def reset
@@sprites = {}
end
def sprites
@@sprites
end
def sprites_path
@@sprites_path || images_path
end
def sprites_path=(path)
@@sprites_path = path
end
def images_path
@@images_path || (defined?(Compass) ? Compass.configuration.images_path : 'public/images')
end
def images_path=(path)
@@images_path = path
end
def reset
@@sprites = {}
end
def generate_sprites(options)
sprites.each do |sprite_name, sprite|
calculate_sprite sprite
if sprite_changed?(sprite_name, sprite, options)
sprite_image = generate_sprite_image sprite
save_sprite_image! sprite_image, sprite
remember_sprite_info! sprite_name, sprite, options
def path_and_name(file)
if file =~ %r{((.+/)?(.+))/(\*)\.png}
[$1, $3, $4]
end
end
end
def sprite_changed?(sprite_name, sprite, options)
existing_sprite_info = options[:cache_store].retrieve("_#{sprite_name}_data", "") || {}
existing_sprite_info[:sprite] != sprite or existing_sprite_info[:timestamps] != timestamps(sprite)
rescue
true
end
def remember_sprite_info!(sprite_name, sprite, options)
data = {
:sprite => sprite,
:timestamps => timestamps(sprite),
}
options[:cache_store].store("_#{sprite_name}_data", "", data)
end
private
def sprite_info_file(sprite_name)
File.join(Compass::Sprites.images_path, "#{sprite_name}.sprite_info.yml")
end
def timestamps(sprite)
result = {}
sprite[:images].each do |image|
file_name = image[:file]
result[file_name] = File.ctime(file_name)
def sprites(name)
@@sprites = {} if @@sprites.nil?
@@sprites[name] ||= []
end
result
end
def calculate_sprite(sprite)
width, margin_bottom, y = 0, 0, 0
sprite[:images].each do |sprite_item|
if sprite_item[:index] == 0
margin_top = 0
elsif sprite_item[:margin_top] > margin_bottom
margin_top = sprite_item[:margin_top]
else
margin_top = margin_bottom
def images
Compass::Sprites.sprites(self.name)
end
def find(url, context = nil)
if url =~ /\.png$/
path, self.name = Compass::Sprites.path_and_name(url)
glob = File.join(Compass.configuration.images_path, url)
generated_image = "#{path}.png"
y = 0
Dir.glob(glob).sort.each do |file|
width, height = Compass::SassExtensions::Functions::ImageSize::ImageProperties.new(file).size
images << {
:name => File.basename(file, '.png'),
:filename => File.basename(file),
:height => height,
:width => width,
:y => y
}
y += height
end
y += margin_top
sprite_item[:y] = Sass::Script::Number.new(y, ['px'])
y += sprite_item[:height]
width = sprite_item[:width] if sprite_item[:width] > width
margin_bottom = sprite_item[:margin_bottom]
contents = <<-SCSS
$#{name}-sprite-base-class: ".#{name}-sprite" !default;
$#{name}-sprite-dimensions: false !default;
\#{$#{name}-sprite-base-class} {
background: image-url("#{generated_image}") no-repeat;
}
@mixin #{name}-sprite-dimensions($sprite) {
height: image-height("#{name}/\#{$sprite}.png");
width: image-width("#{name}/\#{$sprite}.png");
}
@mixin #{name}-sprite-position($sprite) {
background-position: sprite-position("#{path}/\#{$sprite}.png");
}
@mixin #{name}-sprite($sprite, $dimensions: $#{name}-sprite-dimensions) {
@extend \#{$#{name}-sprite-base-class};
@include #{name}-sprite-position($sprite);
@if $dimensions {
@include #{name}-sprite-dimensions($sprite);
}
}
@mixin all-#{name}-sprites {
#{images.map do |sprite|
%Q(.#{name}-#{sprite[:name]} { @include #{name}-sprite("#{sprite[:name]}"); })
end.join}
}
SCSS
Sass::Engine.new(contents, :filename => name, :syntax => :scss, :importer => self)
end
sprite[:height] = y
sprite[:width] = width
end
def generate_sprite_image(sprite)
sprite_image = ChunkyPNG::Image.new(sprite[:width], sprite[:height], ChunkyPNG::Color::TRANSPARENT)
sprite[:images].each do |sprite_item|
sprite_item_image = ChunkyPNG::Image.from_file(sprite_item[:file])
x = (sprite[:width] - sprite_item[:width]) * (sprite_item[:x].value / 100)
y = sprite_item[:y].value
sprite_image.replace sprite_item_image, x, y
end
sprite_image
def key(name, options)
[self.class.name + ":" + File.dirname(File.expand_path(name)),
File.basename(name)]
end
def save_sprite_image!(sprite_image, sprite)
sprite_image.save File.join(Compass::Sprites.images_path, sprite[:file])
def to_s
"fdsfd"
end
end
end

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@ -1,75 +0,0 @@
require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
describe Compass::Sprites do
before :each do
@sprite = {
:info => 'info',
:images => [
{ :file => 'file1' },
{ :file => 'file2' },
]
}
@file = ""
File.stub!(:read => @file)
Compass::Sprites.stub(:images_path).and_return('image_path')
File.stub!(:ctime => Time.parse('2010-01-01 12:00'))
end
###
describe '#remember_sprite_info' do
subject { Compass::Sprites }
before :each do
@options = {
:cache_store => Sass::InMemoryCacheStore.new
}
end
it 'should save sprite info to the sass cache' do
subject.remember_sprite_info!('the_sprite', @sprite, @options)
@options[:cache_store].retrieve('_the_sprite_data', "")[:sprite].should == @sprite
end
end
###
describe '#sprite_changed?' do
subject { Compass::Sprites }
before :each do
@options = {
:cache_store => Sass::InMemoryCacheStore.new
}
end
it 'should be false if nothing changed' do
subject.remember_sprite_info!('the sprite', @sprite, @options)
subject.sprite_changed?('the sprite', @sprite, @options).should be_false
end
it 'should be true if the sprite info has changed' do
subject.remember_sprite_info!('the sprite', @sprite, @options)
@sprite[:info] = 'changed info'
subject.sprite_changed?('the sprite', @sprite, @options).should be_true
end
it 'should be true if the images changed' do
subject.remember_sprite_info!('the sprite', @sprite, @options)
@sprite[:images] = []
subject.sprite_changed?('the sprite', @sprite, @options).should be_true
end
it 'should be true if a images timestamp changed' do
subject.remember_sprite_info!('the sprite', @sprite, @options)
File.stub!(:ctime => Time.now)
subject.sprite_changed?('the sprite', @sprite, @options).should be_true
end
end
end

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@ -1,216 +0,0 @@
require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
describe Sass::Script::Functions do
before :each do
Compass::Sprites.reset
FileUtils.cp_r File.dirname(__FILE__) + '/images', IMAGES_TMP_PATH
end
after :each do
FileUtils.rm_r IMAGES_TMP_PATH
end
def image_size(file)
IO.read(IMAGES_TMP_PATH + '/' + file)[0x10..0x18].unpack('NN')
end
def evaluate(*values)
sass = 'div' + values.map{ |value| "\n background: #{value}" }.join
css = Sass::Engine.new(sass, :syntax => :sass).render
# find rendered CSS values
# strip selectors, porperty names, semicolons and whitespace
css = css.gsub(/div \{\s*background: (.+?);\s*\}\s*/m, '\\1').split(/;\s*background: /)
css = css.first if css.length == 1
return css
end
###
it "should return the sprite file name" do
evaluate('sprite-image("sprites/30x30.png")').should == "url('/sprites.png')"
end
it "should also work with `sprite-img`" do
evaluate('sprite-img("sprites/30x30.png")').should == "url('/sprites.png')"
end
it "should work in folders with dashes and underscores" do
evaluate('sprite-image("other_images/more-images/sprites/test.png")').should ==
"url('/other_images/more-images/sprites.png')"
end
it "should not work without any folder" do
lambda { evaluate('sprite-image("test.png")') }.should raise_exception(Sass::SyntaxError)
end
it "should set the background position" do
evaluate('sprite-image("sprites/30x30.png") sprite-image("sprites/150x10.png")').should ==
"url('/sprites.png') url('/sprites.png') 0 -30px"
image_size('sprites.png').should == [150, 40]
end
it "should use the X position" do
evaluate('sprite-image("sprites/30x30.png", 5px, 0)').should == "url('/sprites.png') 5px 0"
image_size('sprites.png').should == [30, 30]
end
it "should include the Y position" do
evaluate('sprite-image("sprites/30x30.png", 0, 3px) sprite-image("sprites/150x10.png", 0, -6px)').should ==
"url('/sprites.png') 0 3px url('/sprites.png') 0 -36px"
end
it "should calculate 20px empty space between sprites" do
# Resulting sprite should look like (1 line = 10px height, X = placed image):
# X
#
#
# XX
# XX
#
#
# XXX
# XXX
# XXX
evaluate(
'sprite-image("sprites/10x10.png")',
'sprite-image("sprites/20x20.png", 0, 0, 20px)',
'sprite-image("sprites/30x30.png", 0, 0, 20px)'
).should == [
"url('/sprites.png')",
"url('/sprites.png') 0 -30px",
"url('/sprites.png') 0 -70px"
]
image_size('sprites.png').should == [30, 100]
end
it "should calculate empty space between sprites and combine space like CSS margins" do
# Resulting sprite should look like (1 line = 10px height, X = placed image):
# X
#
#
#
# XX
# XX
#
# XXX
# XXX
# XXX
evaluate(
'sprite-image("sprites/10x10.png", 0, 0, 0, 30px)',
'sprite-image("sprites/20x20.png", 0, 0, 20px, 5px)',
'sprite-image("sprites/30x30.png", 0, 0, 10px)'
).should == [
"url('/sprites.png')",
"url('/sprites.png') 0 -40px",
"url('/sprites.png') 0 -70px"
]
image_size('sprites.png').should == [30, 100]
end
it "should calculate empty space correctly when 2 output images are uses" do
evaluate(
'sprite-image("sprites/10x10.png", 0, 0, 0, 30px)',
'sprite-image("other_images/test.png")',
'sprite-image("sprites/20x20.png", 0, 0, 20px, 5px)'
).should == [
"url('/sprites.png')",
"url('/other_images.png')",
"url('/sprites.png') 0 -40px"
]
end
it "should allow % for x positions" do
# Resulting sprite should look like (1 line = 10px height, X = placed image):
# XXXXXXXXXXXXXXX
# X
evaluate(
'sprite-image("sprites/150x10.png")',
'sprite-image("sprites/10x10.png", 100%)'
).should == [
"url('/sprites.png')",
"url('/sprites.png') 100% -10px"
]
end
it "should not compose the same image twice" do
evaluate(
'sprite-image("sprites/10x10.png")',
'sprite-image("sprites/20x20.png")',
'sprite-image("sprites/20x20.png")' # reuse image from line above
).should == [
"url('/sprites.png')",
"url('/sprites.png') 0 -10px",
"url('/sprites.png') 0 -10px"
]
image_size('sprites.png').should == [20, 30]
end
it "should calculate the maximum spacing between images" do
evaluate(
'sprite-image("sprites/10x10.png")',
'sprite-image("sprites/20x20.png", 0, 0, 10px)',
'sprite-image("sprites/20x20.png", 0, 0, 99px)' # 99px > 10px
).should == [
"url('/sprites.png')",
"url('/sprites.png') 0 -109px", # use 99px spacing
"url('/sprites.png') 0 -109px"
]
image_size('sprites.png').should == [20, 129]
end
it "should calculate the maximum spacing between images for margin bottom" do
evaluate(
'sprite-image("sprites/10x10.png", 0, 0, 0, 10px)',
'sprite-image("sprites/10x10.png", 0, 0, 0, 99px)', # 99px > 10px
'sprite-image("sprites/20x20.png")'
).should == [
"url('/sprites.png')",
"url('/sprites.png')",
"url('/sprites.png') 0 -109px" # use 99px spacing
]
image_size('sprites.png').should == [20, 129]
end
it "should output the background-position" do
evaluate(
'sprite-position("sprites/10x10.png")',
'sprite-position("sprites/20x20.png")'
).should == [
"0 0",
"0 -10px"
]
end
it "should output the background-image URL" do
evaluate('sprite-url("sprites")').should == "url('/sprites.png')"
evaluate('sprite-url("sprites/10x10.png")').should == "url('/sprites.png')"
evaluate('sprite-url("sprites/20x20.png")').should == "url('/sprites.png')"
evaluate('sprite-url("other_images/test.png")').should == "url('/other_images.png')"
end
it "should count the PNG files in a folder" do
evaluate('sprite-files-in-folder("sprites")').to_i.should == 4
end
it "should output the n-th file in a folder" do
evaluate('sprite-file-from-folder("sprites", 0)').should == "sprites/10x10.png"
evaluate('sprite-file-from-folder("sprites", 1)').should == "sprites/150x10.png"
end
it "should output the filename without extention for the sprite" do
evaluate('sprite-name("sprites")').should == "sprites"
evaluate('sprite-name("sprites/10x10.png")').should == "sprites"
end
it "should output the filename without extention for the sprite item" do
evaluate('image-basename("sprites/10x10.png")').should == "10x10"
end
end

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@ -5,6 +5,3 @@ require 'rubygems'
require 'compass'
require 'rspec'
require 'rspec/autorun'
IMAGES_TMP_PATH = File.join(File.dirname(__FILE__), 'images-tmp')
Compass::Sprites.images_path = IMAGES_TMP_PATH

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@ -1,43 +0,0 @@
require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
describe Compass::SassExtensions::Functions::Sprites::SpriteInfo do
def sprite_info(*args)
Compass::SassExtensions::Functions::Sprites::SpriteInfo.new(*args)
end
##
it "should output the position for the first sprite" do
sprite = { :file => "sprites.png" }
sprite_item = { :y => Sass::Script::Number.new(20, ['px']), :index => 0 }
x = Sass::Script::Number.new(10, ['px'])
sprite_info(sprite, sprite_item, x).position.should == "10px 0"
end
it "should output the position for the second+ sprite" do
sprite = { :file => "sprites.png" }
sprite_item = { :y => Sass::Script::Number.new(20, ['px']), :index => 1 }
x = Sass::Script::Number.new(10, ['px'])
sprite_info(sprite, sprite_item, x).position.should ==
"10px <%= Compass::Sprites.sprites['sprites.png'][:images][1][:y].unary_minus %>"
end
it "should output the position with y shift" do
sprite = { :file => "sprites.png" }
sprite_item = { :y => Sass::Script::Number.new(20, ['px']), :index => 1 }
x = Sass::Script::Number.new(10, ['px'])
y_shift = Sass::Script::Number.new(3, ['px'])
sprite_info(sprite, sprite_item, x, y_shift).position.should ==
"10px <%= Compass::Sprites.sprites['sprites.png'][:images][1][:y].unary_minus.plus(Sass::Script::Number.new(3, ['px'])) %>"
end
it "should output the position with percentage" do
sprite = { :file => "sprites.png" }
sprite_item = { :y => Sass::Script::Number.new(20, ['px']), :index => 2 }
x = Sass::Script::Number.new(100, ['%'])
sprite_info(sprite, sprite_item, x).position.should ==
"100% <%= Compass::Sprites.sprites['sprites.png'][:images][2][:y].unary_minus %>"
end
end

60
spec/sprites_spec.rb Normal file
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require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
require "compass/sprites"
describe Compass::Sprites do
before :each do
Compass.configuration.images_path = File.dirname(__FILE__) + "/test_project/public/images"
Compass.configure_sass_plugin!
Compass::Sprites.reset
end
def render(scss)
scss = %Q(@import "compass"; #{scss})
options = Compass.sass_engine_options
options[:syntax] = :scss
options[:load_paths] << Compass::Sprites.new
css = Sass::Engine.new(scss, options).render
# reformat to fit result of heredoc:
" #{css.gsub('@charset "UTF-8";', '').gsub(/\n/, "\n ").strip}\n"
end
it "should generate sprite classes" do
css = render <<-SCSS
@import "squares/*.png";
@include all-squares-sprites;
SCSS
css.should == <<-CSS
.squares-sprite, .squares-10x10, .squares-20x20 {
background: url('/squares.png') no-repeat; }
.squares-10x10 {
background-position: 0 0; }
.squares-20x20 {
background-position: 0 -10px; }
CSS
end
it "should generate sprite classes with dimensions" do
css = render <<-SCSS
$squares-sprite-dimensions: true;
@import "squares/*.png";
@include all-squares-sprites;
SCSS
css.should == <<-CSS
.squares-sprite, .squares-10x10, .squares-20x20 {
background: url('/squares.png') no-repeat; }
.squares-10x10 {
background-position: 0 0;
height: 10px;
width: 10px; }
.squares-20x20 {
background-position: 0 -10px;
height: 20px;
width: 20px; }
CSS
end
end

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