From b88f4ca93bcaef9a6bfd21d95acc8f432a3c8e5c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim?= <jose.valim@gmail.com>
Date: Sun, 10 Oct 2010 11:03:18 +0200
Subject: Clean up the house before moving in the new furniture.

This commit moves all the template rendering logic that was hanging around AV::Base to renderer objects.
---
 .../lib/action_view/renderer/template_renderer.rb  | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 actionpack/lib/action_view/renderer/template_renderer.rb

(limited to 'actionpack/lib/action_view/renderer/template_renderer.rb')

diff --git a/actionpack/lib/action_view/renderer/template_renderer.rb b/actionpack/lib/action_view/renderer/template_renderer.rb
new file mode 100644
index 0000000000..3acc68dcac
--- /dev/null
+++ b/actionpack/lib/action_view/renderer/template_renderer.rb
@@ -0,0 +1,66 @@
+require 'action_view/renderer/abstract_renderer'
+
+module ActionView
+  class TemplateRenderer < AbstractRenderer #:nodoc:
+    def render(options)
+      wrap_formats(options[:template] || options[:file]) do
+        template = determine_template(options)
+        lookup_context.freeze_formats(template.formats, true)
+        render_template(template, options[:layout], options)
+      end
+    end
+
+    # Determine the template to be rendered using the given options.
+    def determine_template(options) #:nodoc:
+      keys = (options[:locals] ||= {}).keys
+
+      if options.key?(:inline)
+        handler = Template.handler_class_for_extension(options[:type] || "erb")
+        Template.new(options[:inline], "inline template", handler, { :locals => keys })
+      elsif options.key?(:text)
+        Template::Text.new(options[:text], formats.try(:first))
+      elsif options.key?(:file)
+        with_fallbacks { find_template(options[:file], options[:prefix], false, keys) }
+      elsif options.key?(:template)
+        options[:template].respond_to?(:render) ?
+          options[:template] : find_template(options[:template], options[:prefix], false, keys)
+      end
+    end
+
+    # Renders the given template. An string representing the layout can be
+    # supplied as well.
+    def render_template(template, layout = nil, options = {}) #:nodoc:
+      view, locals = @view, options[:locals] || {}
+      layout = find_layout(layout, locals.keys) if layout
+
+      ActiveSupport::Notifications.instrument("render_template.action_view",
+        :identifier => template.identifier, :layout => layout.try(:virtual_path)) do
+
+        content = template.render(view, locals) { |*name| view._layout_for(*name) }
+      
+        if layout
+          view.store_content_for(:layout, content)
+          content = render_layout(layout, locals)
+        end
+
+        content
+      end
+    end
+
+    # This is the method which actually finds the layout using details in the lookup
+    # context object. If no layout is found, it checks if at least a layout with
+    # the given name exists across all details before raising the error.
+    def find_layout(layout, keys)
+      begin
+        with_layout_format do
+          layout =~ /^\// ?
+            with_fallbacks { find_template(layout, nil, false, keys) } : find_template(layout, nil, false, keys)
+        end
+      rescue ActionView::MissingTemplate => e
+        update_details(:formats => nil) do
+          raise unless template_exists?(layout)
+        end
+      end
+    end
+  end
+end
\ No newline at end of file
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