[FEATURE] Add the ability to look up child elements by name/attribute…

…s easily

lib/ruby_speech/generic_element.rb

@@ -77,8 +77,22 @@ def eval_dsl_block(&block)
       instance_eval &block
     end
 
-    def children
-      super.map { |c| self.class.import c }
+    def children(type = nil, attributes = nil)
+      if type
+        expression = type.to_s
+
+        expression << '[' << attributes.inject([]) do |h, (key, value)|
+          h << "@#{key}='#{value}'"
+        end.join(',') << ']' if attributes
+
+        if namespace_href
+          find "ns:#{expression}", :ns => namespace_href
+        else
+          find expression
+        end
+      else
+        super()
+      end.map { |c| self.class.import c }
     end
 
     def embed(other)

spec/ruby_speech/grxml_spec.rb

@@ -261,6 +261,20 @@ def foo
           its(:children) { should == [string,item] }
         end
       end
+
+      it "should allow finding direct children of a particular type, matching certain attributes" do
+        item = GRXML::Item.new
+        item1 = GRXML::Item.new :weight => 0.5
+        item11 = GRXML::Item.new :weight => 0.5
+        item1 << item11
+        item << item1
+        item2 = GRXML::Item.new :weight => 0.7
+        item << item2
+        tag = GRXML::Tag.new
+        item << tag
+
+        item.children(:item, :weight => 0.5).should == [item1]
+      end
     end # draw
   end # GRXML
 end # RubySpeech