working on sprite importer with erb templates

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    compass (0.12.0.alpha.0.5e89865)
+    compass (0.12.0.alpha.0.71494ce)
       chunky_png (~> 1.2)
       fssm (>= 0.2.7)
       sass (~> 3.1)

lib/compass/sprite_importer.rb

@@ -1,9 +1,15 @@
+require 'erb'
 module Compass
   class SpriteImporter < Sass::Importers::Base
     VAILD_FILE_NAME = /\A#{Sass::SCSS::RX::IDENT}\Z/
     SPRITE_IMPORTER_REGEX = %r{((.+/)?([^\*.]+))/(.+?)\.png}
     VALID_EXTENSIONS = ['.png']
     
+    
+    TEMPLATE_FOLDER = File.join(File.expand_path('../', __FILE__), 'sprite_importer')
+    CONTENT_TEMPLATE_FILE = File.join(TEMPLATE_FOLDER, 'content.erb')
+    GENERATE_OVERRIDES_TEMPLATE_FILE = File.join(TEMPLATE_FOLDER, 'generate_overrides.erb')
+
     # finds all sprite files
     def self.find_all_sprite_map_files(path)
       hex = "[0-9a-f]"
@@ -96,55 +102,7 @@ module Compass
 
     # Generates the Sass for this sprite file
     def self.content_for_images(uri, name, skip_overrides = false)
-      <<-SCSS
+      CONTENT_TEMPLATE ||= ERB.new(CONTENT_TEMPLATE_FILE)
-@import "compass/utilities/sprites/base";
-
-// General Sprite Defaults
-// You can override them before you import this file.
-$#{name}-sprite-base-class: ".#{name}-sprite" !default;
-$#{name}-sprite-dimensions: false !default;
-$#{name}-position: 0% !default;
-$#{name}-spacing: 0 !default;
-$#{name}-repeat: no-repeat !default;
-$#{name}-prefix: '' !default;
-$#{name}-clean-up: true !default;
-$#{name}-layout:vertical !default;
-
-#{skip_overrides ? "$#{name}-sprites: sprite-map(\"#{uri}\", $layout: $#{name}-layout, $cleanup: $#{name}-clean-up);" : generate_overrides(uri, name) }
-
-// All sprites should extend this class
-// The #{name}-sprite mixin will do so for you.
-\#{$#{name}-sprite-base-class} {
-  background: $#{name}-sprites no-repeat;
-}
-
-// Use this to set the dimensions of an element
-// based on the size of the original image.
-@mixin #{name}-sprite-dimensions($name) {
-  @include sprite-dimensions($#{name}-sprites, $name)
-}
-
-// Move the background position to display the sprite.
-@mixin #{name}-sprite-position($name, $offset-x: 0, $offset-y: 0) {
-  @include sprite-background-position($#{name}-sprites, $name, $offset-x, $offset-y)
-}
-
-// Extends the sprite base class and set the background position for the desired sprite.
-// It will also apply the image dimensions if $dimensions is true.
-@mixin #{name}-sprite($name, $dimensions: $#{name}-sprite-dimensions, $offset-x: 0, $offset-y: 0) {
-  @extend \#{$#{name}-sprite-base-class};
-  @include sprite($#{name}-sprites, $name, $dimensions, $offset-x, $offset-y)
-}
-
-@mixin #{name}-sprites($sprite-names, $dimensions: $#{name}-sprite-dimensions, $prefix: sprite-map-name($#{name}-sprites), $offset-x: 0, $offset-y: 0) {
-  @include sprites($#{name}-sprites, $sprite-names, $#{name}-sprite-base-class, $dimensions, $prefix, $offset-x, $offset-y)
-}
-
-// Generates a class for each sprited image.
-@mixin all-#{name}-sprites($dimensions: $#{name}-sprite-dimensions, $prefix: sprite-map-name($#{name}-sprites), $offset-x: 0, $offset-y: 0) {
-  @include #{name}-sprites(#{sprite_names(uri).join(" ")}, $dimensions, $prefix, $offset-x, $offset-y);
-}
-SCSS
     end
     
     # Generates the override defaults for this Sprite

lib/compass/sprite_importer/content.erb

@@ -0,0 +1,47 @@
+@import "compass/utilities/sprites/base";
+
+// General Sprite Defaults
+// You can override them before you import this file.
+$<%= name %>-sprite-base-class: ".<%= name %>-sprite" !default;
+$<%= name %>-sprite-dimensions: false !default;
+$<%= name %>-position: 0% !default;
+$<%= name %>-spacing: 0 !default;
+$<%= name %>-repeat: no-repeat !default;
+$<%= name %>-prefix: '' !default;
+$<%= name %>-clean-up: true !default;
+$<%= name %>-layout:vertical !default;
+
+#{skip_overrides ? "$<%= name %>-sprites: sprite-map(\"<%= uri %>\", $layout: $<%= name %>-layout, $cleanup: $<%= name %>-clean-up);" : generate_overrides(uri, name) }
+
+// All sprites should extend this class
+// The <%= name %>-sprite mixin will do so for you.
+\#{$<%= name %>-sprite-base-class} {
+  background: $<%= name %>-sprites no-repeat;
+}
+
+// Use this to set the dimensions of an element
+// based on the size of the original image.
+@mixin <%= name %>-sprite-dimensions($name) {
+  @include sprite-dimensions($<%= name %>-sprites, $name)
+}
+
+// Move the background position to display the sprite.
+@mixin <%= name %>-sprite-position($name, $offset-x: 0, $offset-y: 0) {
+  @include sprite-background-position($<%= name %>-sprites, $name, $offset-x, $offset-y)
+}
+
+// Extends the sprite base class and set the background position for the desired sprite.
+// It will also apply the image dimensions if $dimensions is true.
+@mixin <%= name %>-sprite($name, $dimensions: $<%= name %>-sprite-dimensions, $offset-x: 0, $offset-y: 0) {
+  @extend \#{$<%= name %>-sprite-base-class};
+  @include sprite($<%= name %>-sprites, $name, $dimensions, $offset-x, $offset-y)
+}
+
+@mixin <%= name %>-sprites($sprite-names, $dimensions: $<%= name %>-sprite-dimensions, $prefix: sprite-map-name($<%= name %>-sprites), $offset-x: 0, $offset-y: 0) {
+  @include sprites($<%= name %>-sprites, $sprite-names, $<%= name %>-sprite-base-class, $dimensions, $prefix, $offset-x, $offset-y)
+}
+
+// Generates a class for each sprited image.
+@mixin all-<%= name %>-sprites($dimensions: $<%= name %>-sprite-dimensions, $prefix: sprite-map-name($<%= name %>-sprites), $offset-x: 0, $offset-y: 0) {
+  @include <%= name %>-sprites(#{sprite_names(uri).join(" ")}, $dimensions, $prefix, $offset-x, $offset-y);
+}