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Forked from danshultz/liquid_view.rb
Last active August 29, 2015 14:27
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liquid/lib/extras/liquid_view.rb file to use in Rails 3 with layouts
# LiquidView is a action view extension class. You can register it with rails
# and use liquid as an template system for .liquid files
#
# Example
#
# ActionView::Base::register_template_handler :liquid, LiquidView
class LiquidView
PROTECTED_ASSIGNS = %w( template_root response _session template_class action_name request_origin session template
_response url _request _cookies variables_added _flash params _headers request cookies
ignore_missing_templates flash _params logger before_filter_chain_aborted headers )
PROTECTED_INSTANCE_VARIABLES = %w( @_request @controller @_first_render @_memoized__pick_template @view_paths
@helpers @assigns_added @template @_render_stack @template_format @assigns )
def self.call(template)
if template.respond_to?(:source)
"LiquidView.new(self).render(#{template.source.inspect}, local_assigns)"
else
"LiquidView.new(self).render(template, local_assigns)"
end
end
def initialize(view)
@view = view
end
def render(template, local_assigns = nil)
@view.controller.headers["Content-Type"] ||= 'text/html; charset=utf-8'
# Rails 2.2 Template has source, but not locals
if template.respond_to?(:source) && !template.respond_to?(:locals)
assigns = (@view.instance_variables - PROTECTED_INSTANCE_VARIABLES).inject({}) do |hash, ivar|
hash[ivar[1..-1]] = @view.instance_variable_get(ivar)
hash
end
else
assigns = @view.assigns.reject{ |k,v| PROTECTED_ASSIGNS.include?(k) }
end
source = template.respond_to?(:source) ? template.source : template
local_assigns = (template.respond_to?(:locals) ? template.locals : local_assigns) || {}
if content_for_layout = @view.instance_variable_get("@content_for_layout")
assigns['content_for_layout'] = content_for_layout
elsif @view.content_for?(:layout)
assigns["content_for_layout"] = @view.content_for(:layout)
end
assigns.merge!(local_assigns.stringify_keys)
controller = @view.controller
tags = tags_from_controller(controller)
register_tags(tags)
liquid = Liquid::Template.parse(source)
filters = filters_from_controller(controller)
liquid.render(assigns, :filters => filters, :registers => {:action_view => @view, :controller => @view.controller})
end
def compilable?
false
end
def filters_from_controller(controller)
filters = if controller.respond_to?(:liquid_filters, true)
controller.send(:liquid_filters)
elsif controller.respond_to?(:master_helper_module)
[controller.master_helper_module]
else
[controller._helpers]
end
filters
end
def register_tags(tags)
tags.keys.each do |key|
Liquid::Template.register_tag(key, tags.fetch(key))
end
end
def tags_from_controller(controller)
tags = if controller.respond_to?(:liquid_tags, true)
controller.send(:liquid_tags)
else
{}
end
tags
end
end
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