diff options
Diffstat (limited to 'actionpack/lib/action_view/renderer/template_renderer.rb')
-rw-r--r-- | actionpack/lib/action_view/renderer/template_renderer.rb | 97 |
1 files changed, 97 insertions, 0 deletions
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..a9076760c5 --- /dev/null +++ b/actionpack/lib/action_view/renderer/template_renderer.rb @@ -0,0 +1,97 @@ +require 'set' +require 'active_support/core_ext/object/try' +require 'active_support/core_ext/array/wrap' +require 'action_view/renderer/abstract_renderer' + +module ActionView + class TemplateRenderer < AbstractRenderer #:nodoc: + attr_reader :rendered + + def initialize(view) + super + @rendered = Set.new + end + + def render(options) + wrap_formats(options[:template] || options[:file]) do + template = determine_template(options) + render_template(template, options[:layout], options[:locals]) + end + end + + def render_once(options) + paths, locals = options[:once], options[:locals] || {} + layout, keys, prefix = options[:layout], locals.keys, options[:prefix] + + raise "render :once expects a String or an Array to be given" unless paths + + render_with_layout(layout, locals) do + contents = [] + Array.wrap(paths).each do |path| + template = find_template(path, prefix, false, keys) + contents << render_template(template, nil, locals) if @rendered.add?(template) + end + contents.join("\n") + end + end + + # Determine the template to be rendered using the given options. + def determine_template(options) #:nodoc: + keys = options[:locals].try(:keys) || [] + + if 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?(:inline) + handler = Template.handler_class_for_extension(options[:type] || "erb") + Template::Inline.new(options[:inline], handler, :locals => 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_name = nil, locals = {}) #:nodoc: + lookup_context.freeze_formats(template.formats, true) + 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.store_content_for(: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) + 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
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