From 2bf3d8f453f93dafaf747470133957ad22aec293 Mon Sep 17 00:00:00 2001
From: Scott Davis <jetviper21@gmail.com>
Date: Fri, 25 Mar 2011 00:54:47 -0400
Subject: [PATCH] reverted chunky_png version pushed that by mistake and
 patched a bug that was causing callbacks to register twice

---
 Gemfile.lock                         |  6 +++---
 compass.gemspec                      |  2 +-
 lib/compass/configuration/helpers.rb | 13 ++++++++-----
 spec/sprites_spec.rb                 | 28 +++++++++++++++++++++++++++-
 4 files changed, 39 insertions(+), 10 deletions(-)

diff --git a/Gemfile.lock b/Gemfile.lock
index e6e7f6fb..812473f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 PATH
   remote: .
   specs:
-    compass (0.11.beta.3.0fdf606)
-      chunky_png (~> 1.1.0)
+    compass (0.11.beta.3.6ff877c)
+      chunky_png (~> 0.12)
       sass (>= 3.1.0.alpha.249)
 
 GEM
@@ -38,7 +38,7 @@ GEM
     addressable (2.2.4)
     arel (2.0.9)
     builder (2.1.2)
-    chunky_png (1.1.0)
+    chunky_png (0.12.0)
     compass-validator (3.0.0)
     css_parser (1.0.1)
     cucumber (0.9.4)
diff --git a/compass.gemspec b/compass.gemspec
index d491b294..e5758060 100644
--- a/compass.gemspec
+++ b/compass.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |gemspec|
   gemspec.summary = %q{A Real Stylesheet Framework}
 
   gemspec.add_dependency 'sass', '>= 3.1.0.alpha.249'
-  gemspec.add_dependency 'chunky_png', '~> 1.1.0'
+  gemspec.add_dependency 'chunky_png', '~> 0.12'
 
   gemspec.files = %w(README.markdown LICENSE.markdown VERSION.yml Rakefile)
   gemspec.files += Dir.glob("bin/*")
diff --git a/lib/compass/configuration/helpers.rb b/lib/compass/configuration/helpers.rb
index 37fc478a..c10bfffa 100644
--- a/lib/compass/configuration/helpers.rb
+++ b/lib/compass/configuration/helpers.rb
@@ -65,11 +65,14 @@ module Compass
             Sass::Plugin.add_template_location sass_dir, css_dir
           end
         end
-        Sass::Plugin.on_updating_stylesheet do |sass_file, css_file|
-          Compass.configuration.run_callback(:stylesheet_saved, css_file)
-        end
-        Sass::Plugin.on_compilation_error do |e, filename, css|
-          Compass.configuration.run_callback(:stylesheet_error, filename, e.message)
+        unless defined?(CallbacksSetup)
+          Sass::Plugin.on_updating_stylesheet do |sass_file, css_file|
+            Compass.configuration.run_callback(:stylesheet_saved, css_file)
+          end
+          Sass::Plugin.on_compilation_error do |e, filename, css|
+            Compass.configuration.run_callback(:stylesheet_error, filename, e.message)
+          end
+          const_set('CallbacksSetup', true)
         end
       end
 
diff --git a/spec/sprites_spec.rb b/spec/sprites_spec.rb
index 3a9668d0..d8944c03 100644
--- a/spec/sprites_spec.rb
+++ b/spec/sprites_spec.rb
@@ -1,5 +1,4 @@
 require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
-require "compass/sprites"
 require 'digest/md5'
 
 describe Compass::Sprites do
@@ -440,5 +439,32 @@ describe Compass::Sprites do
       }
     CSS
   end
+  
+  it "should calculate corret sprite demsions when givin spacing via issue#253" do
+    css = render <<-SCSS
+      $squares-spacing: 10px;
+      @import "squares/*.png";
+      .foo {
+        @include sprite-background-position($squares-sprites, "twenty-by-twenty");
+      }
+      .bar {
+        @include sprite-background-position($squares-sprites, "ten-by-ten");
+      }
+    SCSS
+    image_size('squares-*.png').should == [20, 40]
+    css.should == <<-CSS
+      .squares-sprite {
+        background: url('/squares-e3c68372d9.png') no-repeat;
+      }
+      
+      .foo {
+        background-position: 0 -20px;
+      }
+      
+      .bar {
+        background-position: 0 0;
+      }
+    CSS
+  end
 
 end
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