adding transforms to groups, getting specs to run

Author: Jonathan Slate

Gemfile

@@ -6,8 +6,7 @@ source "http://rubygems.org"
 # Add dependencies to develop your gem here.
 # Include everything needed to run rake, tests, features, etc.
 group :development do
-  gem "rspec", "~> 2.3.0"
-  gem "bundler", "~> 1.0.0"
-  gem "jeweler", "~> 1.5.2"
-  gem "rcov", ">= 0"
+  gem "rspec", "~> 2.10.0"
+  gem "jeweler", "~> 1.8.2"
+  gem "simplecov", "~> 0.6.4"
 end

lib/rasem/svg_image.rb

@@ -118,10 +118,11 @@ def with_style(style={}, &proc)
     @default_styles.pop
   end
 
-  def group(style={}, &proc)
+  def group(style={}, transforms={}, &proc)
     # Open the group
     @output << "<g"
     write_style(style)
+    write_transforms(transforms)
     @output << ">"
     # Call the block
     self.instance_exec(&proc)
@@ -224,5 +225,17 @@ def write_style(style)
     end
     @output << '"'
   end
+
+  def write_transforms(transforms)
+    return if transforms.empty?
+    @output << ' transform="'
+    transforms.each_pair do |attribute, value|
+      value = [value] unless value.is_a?(Array)
+      @output << "#{attribute}(#{value.join(',')})"
+    end
+    @output << '"'
+  end
+
+
 end
 

spec/rasem_spec.rb

@@ -259,6 +259,16 @@
     str = img.output
     str.should =~ %r{<g .*circle.*circle.*</g>}
   end
+
+  it "should apply transforms to a group" do
+    img = Rasem::SVGImage.new(100, 100) do
+      group({}, {:scale => 5, :translate => [15,20]}) do
+        circle(0, 0, 10)
+      end
+    end
+    str = img.output
+    str.should =~ %r{scale\(5\)translate\(15,20\)}
+  end
 
   it "should update width and height after init" do
     img = Rasem::SVGImage.new(100, 100) do