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# frozen_string_literal: true
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.
#
# The Renderer will parse the options from the +render+ or +render_body+
# method and render a partial or a template based on the options. The
# +TemplateRenderer+ and +PartialRenderer+ objects are wrappers which do all
# the setup and logic necessary to render a view and a new object is created
# each time +render+ is called.
class Renderer
attr_accessor :lookup_context
def initialize(lookup_context)
@lookup_context = lookup_context
end
# Main render entry point shared by Action View and Action Controller.
def render(context, options)
render_to_object(context, options).body
end
def render_to_object(context, options) # :nodoc:
if options.key?(:partial)
render_partial_to_object(context, options)
else
render_template_to_object(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 access to template rendering.
def render_template(context, options) #:nodoc:
render_template_to_object(context, options).body
end
# Direct access to partial rendering.
def render_partial(context, options, &block) #:nodoc:
render_partial_to_object(context, options, &block).body
end
def cache_hits # :nodoc:
@cache_hits ||= {}
end
def render_template_to_object(context, options) #:nodoc:
TemplateRenderer.new(@lookup_context).render(context, options)
end
def render_partial_to_object(context, options, &block) #:nodoc:
PartialRenderer.new(@lookup_context).render(context, options, block)
end
end
end
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