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@@ -28,7 +28,36 @@ module Merb::Template
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       name    
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     end
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-    module Mixin; end
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+    module Mixin
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+      def _builder_buffer(the_binding)
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+        @_buffer = eval("xml", the_binding, __FILE__, __LINE__)
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+      end
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+      # ==== Parameters
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+      # *args:: Arguments to pass to the block.
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+      # &block:: The template block to call.
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+      #
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+      # ==== Returns
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+      # String:: The output of the block.
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+      #
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+      # ==== Examples
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+      # Capture being used in a .html.erb page:
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+      # 
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+      #   @foo = capture do
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+      #     xml.instruct!
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+      #     xml.foo do
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+      #       xml.bar "baz"
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+      #     end
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+      #     xml.target!
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+      #   end
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+      def capture_builder(*args, &block)
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+        block.call(*args)
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+      end
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+
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+      def concat_builder(string, binding)
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+        _builder_buffer(binding) << string
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+      end
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+      
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+    end
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     Merb::Template.register_extensions(self, %w[builder]) 
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   end
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 end

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@@ -33,4 +33,24 @@ describe "Builder" do
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     end
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     c.body.should == xml.target!
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   end
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+  
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+  it "should capture_builder properly" do
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+    c = dispatch_to(CaptureBuilder, :index, :format => "xml")
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+    xml = ::Builder::XmlMarkup.new :indent => 4
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+    xml.instruct!
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+    xml.comment! "I would not say such things if I were you"
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+    xml.node 'Capture'
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+    
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+    c.body.should == xml.target!
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+  end
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+  
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+  it "should concat_builder properly" do
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+    c = dispatch_to(ConcatBuilder, :index, :format => "xml")
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+    xml = ::Builder::XmlMarkup.new :indent => 4
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+    xml.instruct!
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+    xml.node 'Concat'
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+    
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+    c.body.should == xml.target!.chomp
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+  end
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+  
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 end

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@@ -20,4 +20,13 @@ class PartialIvars < BuilderController
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 end
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 class CaptureBuilder < BuilderController
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+end
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+
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+module Merb::ConcatBuilderHelper
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+  def concatter(&blk)
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+    concat("<node>Concat</node>", blk.binding)
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+  end
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+end
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+
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+class ConcatBuilder < BuilderController
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 end
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