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module ActionView
# This is the main entry point for rendering. It basically delegates
# to other objects like TemplateRenderer and PartialRenderer which
# actually renders the template.
class Renderer
attr_accessor :lookup_context
def initialize(lookup_context)
@lookup_context = lookup_context
end
# Main render entry point shared by AV and AC.
def render(context, options)
if (options.is_a?(HashWithIndifferentAccess) && !options.respond_to?(:permitted?)) ||
(options.respond_to?(:permitted?) && !options.permitted?)
raise ArgumentError, "render parameters are not permitted"
end
if options.key?(:partial)
render_partial(context, options)
else
render_template(context, options)
end
end
# Render but returns a valid Rack body. If fibers are defined, we return
# a streaming body that renders the template piece by piece.
#
# Note that partials are not supported to be rendered with streaming,
# so in such cases, we just wrap them in an array.
def render_body(context, options)
if options.key?(:partial)
[render_partial(context, options)]
else
StreamingTemplateRenderer.new(@lookup_context).render(context, options)
end
end
# Direct accessor to template rendering.
def render_template(context, options) #:nodoc:
_template_renderer.render(context, options)
end
# Direct access to partial rendering.
def render_partial(context, options, &block) #:nodoc:
_partial_renderer.render(context, options, block)
end
private
def _template_renderer #:nodoc:
@_template_renderer ||= TemplateRenderer.new(@lookup_context)
end
def _partial_renderer #:nodoc:
@_partial_renderer ||= PartialRenderer.new(@lookup_context)
end
end
end
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