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require 'active_support/core_ext/object/try'
module ActionView
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) #:nodoc:
case options
when Hash
if block_given?
content = _render_partial(options.merge(:partial => options[:layout]), &block)
safe_concat(content)
else
_render(options)
end
when :update
update_page(&block)
else
_render_partial(:partial => options, :locals => locals)
end
end
# This is the API to render a ViewContext's template from a controller.
def render_template(options, &block)
_evaluate_assigns_and_ivars
# TODO Layout for partials should be handled here, because inside the
# partial renderer it looks for the layout as a partial.
if options.key?(:partial) && options[:layout]
options[:layout] = _find_layout(options[:layout])
end
_render(options, &block)
end
# This method holds the common render logic for both controllers and
# views rendering stacks.
def _render(options) #:nodoc:
if options.key?(:partial)
_render_partial(options)
else
template = _determine_template(options)
yield template if block_given?
_render_template(template, options[:layout], options)
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], self.formats.try(:first))
elsif options.key?(:_template)
options[:_template]
elsif options.key?(:file)
with_fallbacks { find(options[:file], options[:prefix]) }
elsif options.key?(:template)
find(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("action_view.render_template",
:identifier => template.identifier, :layout => layout.try(:identifier)) do
content = template.render(self, locals) { |*name| _layout_for(*name) }
@_content_for[:layout] = content
if layout
@_layout = layout.identifier
content = _render_layout(layout, locals)
end
content
end
end
end
end
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