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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
# TODO: render_context should not be an initialization parameter
def initialize(lookup_context, render_context)
@render_context = render_context
@lookup_context = lookup_context
@view_flow = OutputFlow.new
end
# Returns the result of a render that's dictated by the options hash. The primary options are:
#
# * <tt>:partial</tt> - See ActionView::Partials.
# * <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
_render_template(options)
end
else
_render_partial(:partial => options, :locals => locals)
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(options)
if options.key?(:partial)
[_render_partial(options)]
else
StreamingTemplateRenderer.new(@render_context, @lookup_context).render(options)
end
end
private
def _render_template(options) #:nodoc:
_template_renderer.render(options)
end
def _template_renderer #:nodoc:
@_template_renderer ||= TemplateRenderer.new(@render_context, @lookup_context)
end
def _render_partial(options, &block) #:nodoc:
_partial_renderer.setup(options, block).render
end
def _partial_renderer #:nodoc:
@_partial_renderer ||= PartialRenderer.new(@render_context, @lookup_context)
end
end
end
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