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require "abstract_controller/logger"
module AbstractController
module RenderingController
extend ActiveSupport::Concern
include AbstractController::Logger
included do
attr_internal :formats
extlib_inheritable_accessor :_view_paths
self._view_paths ||= ActionView::PathSet.new
end
# An instance of a view class. The default view class is ActionView::Base
#
# The view class must have the following methods:
# View.for_controller[controller] Create a new ActionView instance for a
# controller
# View#render_partial[options]
# - responsible for setting options[:_template]
# - Returns String with the rendered partial
# options<Hash>:: see _render_partial in ActionView::Base
# View#render_template[template, layout, options, partial]
# - Returns String with the rendered template
# template<ActionView::Template>:: The template to render
# layout<ActionView::Template>:: The layout to render around the template
# options<Hash>:: See _render_template_with_layout in ActionView::Base
# partial<Boolean>:: Whether or not the template to render is a partial
#
# Override this method in a to change the default behavior.
def view_context
@_view_context ||= ActionView::Base.for_controller(self)
end
# Mostly abstracts the fact that calling render twice is a DoubleRenderError.
# Delegates render_to_body and sticks the result in self.response_body.
def render(*args)
if response_body
raise AbstractController::DoubleRenderError, "OMG"
end
self.response_body = render_to_body(*args)
end
# Raw rendering of a template to a Rack-compatible body.
#
# ==== Options
# _partial_object<Object>:: The object that is being rendered. If this
# exists, we are in the special case of rendering an object as a partial.
#
# :api: plugin
def render_to_body(options = {})
# TODO: Refactor so we can just use the normal template logic for this
if options.key?(:partial)
view_context.render_partial(options)
else
_determine_template(options)
_render_template(options)
end
end
# Raw rendering of a template to a string. Just convert the results of
# render_to_body into a String.
#
# :api: plugin
def render_to_string(options = {})
AbstractController::RenderingController.body_to_s(render_to_body(options))
end
# Renders the template from an object.
#
# ==== Options
# _template<ActionView::Template>:: The template to render
# _layout<ActionView::Template>:: The layout to wrap the template in (optional)
# _partial<TrueClass, FalseClass>:: Whether or not the template to be rendered is a partial
def _render_template(options)
view_context.render_template(options)
end
# The list of view paths for this controller. See ActionView::ViewPathSet for
# more details about writing custom view paths.
def view_paths
_view_paths
end
# Return a string representation of a Rack-compatible response body.
def self.body_to_s(body)
if body.respond_to?(:to_str)
body
else
strings = []
body.each { |part| strings << part.to_s }
body.close if body.respond_to?(:close)
strings.join
end
end
private
# Take in a set of options and determine the template to render
#
# ==== Options
# _template<ActionView::Template>:: If this is provided, the search is over
# _template_name<#to_s>:: The name of the template to look up. Otherwise,
# use the current action name.
# _prefix<String>:: The prefix to look inside of. In a file system, this corresponds
# to a directory.
# _partial<TrueClass, FalseClass>:: Whether or not the file to look up is a partial
def _determine_template(options)
name = (options[:_template_name] || action_name).to_s
options[:_template] ||= view_paths.find(
name, { :formats => formats }, options[:_prefix], options[:_partial]
)
end
module ClassMethods
# Append a path to the list of view paths for this controller.
#
# ==== Parameters
# path<String, ViewPath>:: If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::ViewPathSet for more information)
def append_view_path(path)
self.view_paths << path
end
# Prepend a path to the list of view paths for this controller.
#
# ==== Parameters
# path<String, ViewPath>:: If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::ViewPathSet for more information)
def prepend_view_path(path)
self.view_paths.unshift(path)
end
# A list of all of the default view paths for this controller.
def view_paths
self._view_paths
end
# Set the view paths.
#
# ==== Parameters
# paths<ViewPathSet, Object>:: If a ViewPathSet is provided, use that;
# otherwise, process the parameter into a ViewPathSet.
def view_paths=(paths)
self._view_paths = paths.is_a?(ActionView::PathSet) ?
paths : ActionView::Base.process_view_paths(paths)
end
end
end
end
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