added error messages to help lemonade users

lib/compass/sass_extensions/functions/sprites.rb

@@ -8,7 +8,7 @@ module Compass::SassExtensions::Functions::Sprites
     last_spacing = 0
     width = 0
     height = 0
-    images = Compass::Sprites.sprites(name)
+    images = Compass::Sprites.sprites(path, name)
     
     # Calculation
     images.each do |image|
@@ -50,7 +50,8 @@ module Compass::SassExtensions::Functions::Sprites
     sprite_url(uri)
   end
   
-  def sprite_image(uri, x_shift = SASS_NULL, y_shift = SASS_NULL)
+  def sprite_image(uri, x_shift = SASS_NULL, y_shift = SASS_NULL, depricated_1 = nil, depricated_2 = nil)
+    check_spacing_deprecation uri, depricated_1, depricated_2
     url = sprite_url(uri)
     position = sprite_position(uri, x_shift, y_shift)
     Sass::Script::String.new("#{url} #{position}")
@@ -61,10 +62,11 @@ module Compass::SassExtensions::Functions::Sprites
     image_url(Sass::Script::String.new("#{path}.png"))
   end
 
-  def sprite_position(uri, x_shift = SASS_NULL, y_shift = SASS_NULL)
-    name = File.dirname(uri.value)
+  def sprite_position(uri, x_shift = SASS_NULL, y_shift = SASS_NULL, depricated_1 = nil, depricated_2 = nil)
+    check_spacing_deprecation uri, depricated_1, depricated_2
+    path, name = Compass::Sprites.path_and_name(uri.value)
     image_name = File.basename(uri.value, '.png')
-    image = Compass::Sprites.sprites(name).detect{ |image| image[:name] == image_name }
+    image = Compass::Sprites.sprites(path, name).detect{ |image| image[:name] == image_name }
     if x_shift.unit_str == "%"
       x = x_shift.to_s
     else
@@ -85,4 +87,14 @@ private
       0
     end
   end
+  
+  def check_spacing_deprecation(uri, spacing_before, spacing_after)
+    if spacing_before or spacing_after
+      path, name, image_name = Compass::Sprites.path_and_name(uri.value)
+      message = %Q(Spacing parameter is deprecated. ) +
+        %Q(Please add `$#{name}-#{image_name}-spacing: #{spacing_before};` ) +
+        %Q(before the `@import "#{path}/*.png";` statement.)
+      raise Compass::Error, message
+    end
+  end
 end

lib/compass/sprites.rb

@@ -1,6 +1,7 @@
 module Compass
   class Sprites < Sass::Importers::Base
     attr_accessor :name
+    attr_accessor :path
     
     class << self
       def reset
@@ -13,19 +14,27 @@ module Compass
         end
       end
     
-      def sprites(name)
+      def sprites(path, name, create = false)
         @@sprites = {} if @@sprites.nil?
-        @@sprites[name] ||= []
+        index = "#{path}/#{name}"
+        images = @@sprites[index]
+        if images
+          images
+        elsif create
+          images = @@sprites[index] = []
+        else
+          raise Compass::Error, %Q(`@import` statement missing. Please add `@import "#{path}/*.png";`.)
+        end
       end
     end
 
     def images
-      Compass::Sprites.sprites(self.name)
+      Compass::Sprites.sprites(self.path, self.name, true)
     end
 
     def find(uri, options)
       if uri =~ /\.png$/
-        path, self.name = Compass::Sprites.path_and_name(uri)
+        self.path, self.name = Compass::Sprites.path_and_name(uri)
         glob = File.join(Compass.configuration.images_path, uri)
         Dir.glob(glob).sort.each do |file|
           width, height = Compass::SassExtensions::Functions::ImageSize::ImageProperties.new(file).size

spec/sprites_spec.rb

@@ -396,4 +396,38 @@ describe Compass::Sprites do
     CSS
   end
   
+  it "should raise deprication errors for lemonade's spacing syntax" do
+    proc do
+      render <<-SCSS
+        @import "squares/*.png";
+        
+        .squares {
+          background: sprite-image("squares/20x20.png", 0, 0, 11px) no-repeat;
+        }
+      SCSS
+    end.should raise_error Compass::Error,
+      %q(Spacing parameter is deprecated. Please add `$squares-20x20-spacing: 11px;` before the `@import "squares/*.png";` statement.)
+    proc do
+      render <<-SCSS
+        @import "squares/*.png";
+        
+        .squares {
+          background: sprite-position("squares/20x20.png", 0, 0, 11px) no-repeat;
+        }
+      SCSS
+    end.should raise_error Compass::Error,
+      %q(Spacing parameter is deprecated. Please add `$squares-20x20-spacing: 11px;` before the `@import "squares/*.png";` statement.)
+  end
+  
+  it "should raise an error if @import is missing" do
+    proc do
+      render <<-SCSS
+        .squares {
+          background: sprite-image("squares/20x20.png") no-repeat;
+        }
+      SCSS
+    end.should raise_error Compass::Error,
+      %q(`@import` statement missing. Please add `@import "squares/*.png";`.)
+  end
+  
 end