From 0d6e8edc2a47a4b4c6824936632bfb83850db343 Mon Sep 17 00:00:00 2001
From: Piotr Sarnacki <drogus@gmail.com>
Date: Sat, 4 May 2013 15:09:22 +0200
Subject: Move actionpack/lib/action_view* into actionview/lib

---
 .../lib/action_view/renderer/template_renderer.rb  | 96 ++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 actionview/lib/action_view/renderer/template_renderer.rb

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

diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb
new file mode 100644
index 0000000000..4d5c5db80c
--- /dev/null
+++ b/actionview/lib/action_view/renderer/template_renderer.rb
@@ -0,0 +1,96 @@
+require 'active_support/core_ext/object/try'
+
+module ActionView
+  class TemplateRenderer < AbstractRenderer #:nodoc:
+    def render(context, options)
+      @view    = context
+      @details = extract_details(options)
+      template = determine_template(options)
+      context  = @lookup_context
+
+      prepend_formats(template.formats)
+
+      unless context.rendered_format
+        context.rendered_format = template.formats.first || formats.last
+      end
+
+      render_template(template, options[:layout], options[:locals])
+    end
+
+    # Determine the template to be rendered using the given options.
+    def determine_template(options) #:nodoc:
+      keys = options.fetch(:locals, {}).keys
+
+      if options.key?(:text)
+        Template::Text.new(options[:text], formats.first)
+      elsif options.key?(:file)
+        with_fallbacks { find_template(options[:file], nil, false, keys, @details) }
+      elsif options.key?(:inline)
+        handler = Template.handler_for_extension(options[:type] || "erb")
+        Template.new(options[:inline], "inline template", handler, :locals => keys)
+      elsif options.key?(:template)
+        if options[:template].respond_to?(:render)
+          options[:template]
+        else
+          find_template(options[:template], options[:prefixes], false, keys, @details)
+        end
+      else
+        raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file or :text option."
+      end
+    end
+
+    # Renders the given template. A string representing the layout can be
+    # supplied as well.
+    def render_template(template, layout_name = nil, locals = nil) #:nodoc:
+      view, locals = @view, locals || {}
+
+      render_with_layout(layout_name, locals) do |layout|
+        instrument(:template, :identifier => template.identifier, :layout => layout.try(:virtual_path)) do
+          template.render(view, locals) { |*name| view._layout_for(*name) }
+        end
+      end
+    end
+
+    def render_with_layout(path, locals) #:nodoc:
+      layout  = path && find_layout(path, locals.keys)
+      content = yield(layout)
+
+      if layout
+        view = @view
+        view.view_flow.set(:layout, content)
+        layout.render(view, locals){ |*name| view._layout_for(*name) }
+      else
+        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)
+      with_layout_format { resolve_layout(layout, keys) }
+    end
+
+    def resolve_layout(layout, keys)
+      case layout
+      when String
+        begin
+          if layout =~ /^\//
+            with_fallbacks { find_template(layout, nil, false, keys, @details) }
+          else
+            find_template(layout, nil, false, keys, @details)
+          end
+        rescue ActionView::MissingTemplate
+          all_details = @details.merge(:formats => @lookup_context.default_formats)
+          raise unless template_exists?(layout, nil, false, keys, all_details)
+        end
+      when Proc
+        resolve_layout(layout.call, keys)
+      when FalseClass
+        nil
+      else
+        layout
+      end
+    end
+  end
+end
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