From d9ca08f68547efea27484a2c12ba3c650050d99d Mon Sep 17 00:00:00 2001
From: Scott Davis <jetviper21@gmail.com>
Date: Mon, 16 May 2011 09:36:27 -0400
Subject: [PATCH] test files

---
 lib/compass/sass_extensions/sprites.rb        |   1 +
 lib/compass/sass_extensions/sprites/base.rb   |  34 ++++++++++--
 .../sass_extensions/sprites/image_row.rb      |  35 ++++++++++++
 .../sprites/public/images/image_row/large.png | Bin 0 -> 2857 bytes
 .../public/images/image_row/large_square.png  | Bin 0 -> 2826 bytes
 .../public/images/image_row/medium.png        | Bin 0 -> 2832 bytes
 .../sprites/public/images/image_row/small.png | Bin 0 -> 2809 bytes
 .../sprites/public/images/image_row/tall.png  | Bin 0 -> 2817 bytes
 test/units/sprites/image_row_test.rb          |  52 ++++++++++++++++++
 9 files changed, 117 insertions(+), 5 deletions(-)
 create mode 100644 lib/compass/sass_extensions/sprites/image_row.rb
 create mode 100644 test/fixtures/sprites/public/images/image_row/large.png
 create mode 100644 test/fixtures/sprites/public/images/image_row/large_square.png
 create mode 100644 test/fixtures/sprites/public/images/image_row/medium.png
 create mode 100644 test/fixtures/sprites/public/images/image_row/small.png
 create mode 100644 test/fixtures/sprites/public/images/image_row/tall.png
 create mode 100644 test/units/sprites/image_row_test.rb

diff --git a/lib/compass/sass_extensions/sprites.rb b/lib/compass/sass_extensions/sprites.rb
index 12e821ed..7927799e 100644
--- a/lib/compass/sass_extensions/sprites.rb
+++ b/lib/compass/sass_extensions/sprites.rb
@@ -1,6 +1,7 @@
 require 'digest/md5'
 require 'compass/sass_extensions/sprites/sprite_map'
 require 'compass/sass_extensions/sprites/image'
+require 'compass/sass_extensions/sprites/image_row'
 require 'compass/sass_extensions/sprites/base'
 require 'compass/sass_extensions/sprites/engines'
 
diff --git a/lib/compass/sass_extensions/sprites/base.rb b/lib/compass/sass_extensions/sprites/base.rb
index 3051248a..f734118a 100644
--- a/lib/compass/sass_extensions/sprites/base.rb
+++ b/lib/compass/sass_extensions/sprites/base.rb
@@ -70,12 +70,36 @@ module Compass
         # Calculates the overal image dimensions
         # collects image sizes and input parameters for each sprite
         def compute_image_positions!
-          @images.each_with_index do |image, index|
-            image.left = image.position.unit_str == "%" ? (@width - image.width) * (image.position.value / 100) : image.position.value
-            next if index == 0
-            last_image = @images[index-1]
-            image.top = last_image.top + last_image.height + [image.spacing,  last_image.spacing].max
+          imgs = @images.sort { |a,b| a.width <=> b.width }
+          rows = [::Compass::SassExtensions::Sprites::ImageRow.new(@width)]
+          imgs.each do |image|
+            next if rows.last.add(image)
+            
+            rows << ::Compass::SassExtensions::Sprites::ImageRow.new(@width)
+            unless rows.last.add(image)
+              raise "Image failed to be added"
+            end
+            
           end
+          current_y = 0
+          rows.each do |row|
+            current_x = 0
+            row.images.each_with_index do |image, index|
+              image.left = current_x
+              image.top = current_y
+              current_x += image.width
+              image.left = image.position.unit_str == "%" ? (@width - image.width) * (image.position.value / 100) : image.position.value
+            end
+            current_y += row.height
+          end
+          
+          # @images.each_with_index do |image, index|
+          #   image.left = image.position.unit_str == "%" ? (@width - image.width) * (image.position.value / 100) : image.position.value
+          #   next if index == 0
+          #   last_image = @images[index-1]
+          #   image.top = last_image.top + last_image.height + [image.spacing,  last_image.spacing].max
+          #   last_image = image
+          # end
         end
         
         # Fetches the Sprite::Image object for the supplied name
diff --git a/lib/compass/sass_extensions/sprites/image_row.rb b/lib/compass/sass_extensions/sprites/image_row.rb
new file mode 100644
index 00000000..d7a85d52
--- /dev/null
+++ b/lib/compass/sass_extensions/sprites/image_row.rb
@@ -0,0 +1,35 @@
+module Compass
+  module SassExtensions
+    module Sprites
+      class ImageRow
+        attr_reader :images, :max_width
+        
+        def initialize(max_width)
+          @images = []
+          @max_width = max_width
+        end
+        
+        def add(image)
+          unless image.is_a?(Compass::SassExtensions::Sprites::Image)
+            raise ArgumentError, "Must be a SpriteImage"
+          end
+          if (images.inject(0) {|sum, img| sum + img.width} + image.width) > max_width
+            return false
+          end
+          @images << image
+          true
+        end
+        
+        def height
+          images.map(&:height).max
+        end
+        
+        def width
+          images.map(&:width).max
+        end
+        
+      end
+    end
+  end
+end
+  
\ No newline at end of file
diff --git a/test/fixtures/sprites/public/images/image_row/large.png b/test/fixtures/sprites/public/images/image_row/large.png
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diff --git a/test/units/sprites/image_row_test.rb b/test/units/sprites/image_row_test.rb
new file mode 100644
index 00000000..397793dc
--- /dev/null
+++ b/test/units/sprites/image_row_test.rb
@@ -0,0 +1,52 @@
+require 'test_helper'
+
+class ImageRowTest < Test::Unit::TestCase
+  
+  def setup
+    @filenames = %w(large.png large_square.png medium.png tall.png small.png)
+    Compass.configuration.stubs(:images_path).returns('./')
+    @images_src_path = File.join(File.dirname(__FILE__), '..', '..', 'fixtures', 'sprites', 'public', 'images')
+    @image_files = Dir["#{@images_src_path}/image_row/*.png"].sort
+    @images = @image_files.map do |img|
+      Compass::SassExtensions::Sprites::Image.new(nil, img, {})
+    end
+    image_row(1000)
+  end
+  
+  def image_row(max)
+    @image_row = Compass::SassExtensions::Sprites::ImageRow.new(max)
+  end
+  
+  def teardown
+    
+  end
+  
+  
+  def populate_row
+    @images.each do |image|
+      assert @image_row.add(image)
+    end
+  end
+  
+  it "should return false if image will not fit in row" do
+    image_row(100)
+    img = Compass::SassExtensions::Sprites::Image.new(nil, File.join(@images_src_path, 'image_row', 'large.png'), {})
+    assert !@image_row.add(img)
+  end
+  
+  it "should have 5 images" do
+    populate_row
+    assert_equal 5, @image_row.images.size
+  end
+  
+  it "should return max image width" do
+    populate_row
+    assert_equal 400, @image_row.width
+  end
+  
+  it "should return max image height" do
+    populate_row
+    assert_equal 40, @image_row.height
+  end
+  
+end
\ No newline at end of file