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require 'active_support/core_ext/object/try'
module ActionView
# = Action View Rendering
module Rendering
# Returns the result of a render that's dictated by the options hash. The primary options are:
#
# * <tt>:partial</tt> - See ActionView::Partials.
# * <tt>:update</tt> - Calls update_page with the block given.
# * <tt>:file</tt> - Renders an explicit template file (this used to be the old default), add :locals to pass in those.
# * <tt>:inline</tt> - Renders an inline template similar to how it's done in the controller.
# * <tt>:text</tt> - Renders the text passed in out.
#
# If no options hash is passed or :update specified, the default is to render a partial and use the second parameter
# as the locals hash.
def render(options = {}, locals = {}, &block)
case options
when Hash
if block_given?
_render_partial(options.merge(:partial => options[:layout]), &block)
elsif options.key?(:partial)
_render_partial(options)
else
template = _determine_template(options)
lookup_context.freeze_formats(template.formats, true)
_render_template(template, options[:layout], options)
end
when :update
update_page(&block)
else
_render_partial(:partial => options, :locals => locals)
end
end
# Determine the template to be rendered using the given options.
def _determine_template(options) #:nodoc:
if options.key?(:inline)
handler = Template.handler_class_for_extension(options[:type] || "erb")
Template.new(options[:inline], "inline template", handler, {})
elsif options.key?(:text)
Template::Text.new(options[:text], formats.try(:first))
elsif options.key?(:file)
with_fallbacks { find_template(options[:file], options[:prefix]) }
elsif options.key?(:template)
options[:template].respond_to?(:render) ?
options[:template] : find_template(options[:template], options[:prefix])
end
end
# Renders the given template. An string representing the layout can be
# supplied as well.
def _render_template(template, layout = nil, options = {}) #:nodoc:
locals = options[:locals] || {}
layout = find_layout(layout) if layout
ActiveSupport::Notifications.instrument("render_template.action_view",
:identifier => template.identifier, :layout => layout.try(:virtual_path)) do
content = template.render(self, locals) { |*name| _layout_for(*name) }
@_content_for[:layout] = content if layout
content = _render_layout(layout, locals) if layout
content
end
end
end
end
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