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require 'action_view/base'
module AbstractController
module ViewPaths
extend ActiveSupport::Concern
included do
class_attribute :_view_paths
self._view_paths = ActionView::PathSet.new
self._view_paths.freeze
end
delegate :template_exists?, :view_paths, :formats, :formats=,
:locale, :locale=, :to => :lookup_context
module ClassMethods
def parent_prefixes
@parent_prefixes ||= begin
parent_controller = superclass
prefixes = []
until parent_controller.abstract?
prefixes << parent_controller.controller_path
parent_controller = parent_controller.superclass
end
prefixes
end
end
end
# The prefixes used in render "foo" shortcuts.
def _prefixes
@_prefixes ||= begin
parent_prefixes = self.class.parent_prefixes
parent_prefixes.dup.unshift(controller_path)
end
end
# LookupContext is the object responsible to hold all information required to lookup
# templates, i.e. view paths and details. Check ActionView::LookupContext for more
# information.
def lookup_context
@_lookup_context ||=
ActionView::LookupContext.new(self.class._view_paths, details_for_lookup, _prefixes)
end
def details_for_lookup
{ }
end
def append_view_path(path)
lookup_context.view_paths.push(*path)
end
def prepend_view_path(path)
lookup_context.view_paths.unshift(*path)
end
module ClassMethods
# Append a path to the list of view paths for this controller.
#
# ==== Parameters
# * <tt>path</tt> - If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::PathSet for more information)
def append_view_path(path)
self._view_paths = view_paths + Array(path)
end
# Prepend a path to the list of view paths for this controller.
#
# ==== Parameters
# * <tt>path</tt> - If a String is provided, it gets converted into
# the default view path. You may also provide a custom view path
# (see ActionView::PathSet for more information)
def prepend_view_path(path)
self._view_paths = ActionView::PathSet.new(Array(path) + view_paths)
end
# A list of all of the default view paths for this controller.
def view_paths
_view_paths
end
# Set the view paths.
#
# ==== Parameters
# * <tt>paths</tt> - If a PathSet is provided, use that;
# otherwise, process the parameter into a PathSet.
def view_paths=(paths)
self._view_paths = ActionView::PathSet.new(Array(paths))
end
end
end
end
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