Merge pull request #143 from bhollis/master

Add allows_script? method to Template

lib/tilt/coffee.rb

@@ -45,6 +45,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= CoffeeScript.compile(data, options)
     end
+
+    def allows_script?
+      false
+    end
   end
 end
 

lib/tilt/css.rb

@@ -24,6 +24,10 @@ def evaluate(scope, locals, &block)
       @output ||= @engine.render
     end
 
+    def allows_script?
+      false
+    end
+
   private
     def sass_options
       options.merge(:filename => eval_file, :line => line, :syntax => :sass)
@@ -67,6 +71,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_css
     end
+
+    def allows_script?
+      false
+    end
   end
 end
 

lib/tilt/liquid.rb

@@ -37,5 +37,9 @@ def evaluate(scope, locals, &block)
       locals['content'] = locals['yield']
       @engine.render(locals)
     end
+
+    def allows_script?
+      false
+    end
   end
 end

lib/tilt/markdown.rb

@@ -37,6 +37,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 
   # Upskirt Markdown implementation. See:
@@ -61,6 +65,10 @@ def evaluate(scope, locals, &block)
       @engine.evaluate(scope, locals, &block)
     end
 
+    def allows_script?
+      false
+    end
+
     # Compatibility mode for Redcarpet 1.x
     class Redcarpet1 < RDiscountTemplate
       self.default_mime_type = 'text/html'
@@ -116,6 +124,10 @@ def prepare
       def evaluate(scope, locals, &block)
         @output ||= @engine.render(data)
       end
+
+      def allows_script?
+        false
+      end
     end
   end
 
@@ -140,6 +152,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 
   # Maruku markdown implementation. See:
@@ -161,6 +177,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 
   # Kramdown Markdown implementation. See:
@@ -185,6 +205,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 end
 

lib/tilt/radius.rb

@@ -47,5 +47,9 @@ def evaluate(scope, locals, &block)
       parser = Radius::Parser.new(context, options)
       parser.parse(data)
     end
+
+    def allows_script?
+      false
+    end
   end
 end

lib/tilt/rdoc.rb

@@ -29,5 +29,9 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_s
     end
+
+    def allows_script?
+      false
+    end
   end
 end

lib/tilt/template.rb

@@ -92,6 +92,15 @@ def eval_file
       file || '(__TEMPLATE__)'
     end
 
+    # Whether or not this template engine allows executing Ruby script
+    # within the template. If this is false, +scope+ and +locals+ will
+    # generally not be used, nor will the provided block be avaiable 
+    # via +yield+.
+    # This should be overridden by template subclasses.
+    def allows_script?
+      true
+    end
+
   protected
     # Called once and only once for each template subclass the first time
     # the template class is initialized. This should be used to require the

lib/tilt/textile.rb

@@ -20,6 +20,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 end
 

lib/tilt/wiki.rb

@@ -24,6 +24,10 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 
   # WikiCloth implementation. See:
@@ -46,5 +50,9 @@ def prepare
     def evaluate(scope, locals, &block)
       @output ||= @engine.to_html
     end
+
+    def allows_script?
+      false
+    end
   end
 end