obsolete.ChilliProject/lib/chili_project/liquid/variables.rb

62 lines
1.8 KiB
Ruby

#-- encoding: UTF-8
#-- copyright
# ChiliProject is a project management system.
#
# Copyright (C) 2010-2011 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# See doc/COPYRIGHT.rdoc for more details.
#++
module ChiliProject
module Liquid
module Variables
class LazyVariable
def initialize(context, &block)
@block = block
@context = context
end
def to_liquid()
(@block.arity == 0) ? @block.call : @block.call(@context)
end
end
# Register a Liquid variable.
# Pass a value to register a fixed variable or a block to create a lazy
# evaluated variable. The block can take the current context
def self.register(name, value=nil, &block)
var = block_given? ? Proc.new(){|ctx| LazyVariable.new(ctx, &block)} : value
all[name.to_s] = var
end
def self.all
@variables ||= {}
end
register "tags" do
::Liquid::Template.tags.keys.sort
end
register "variables" do |context|
vars = []
vars = context.environments.first.keys.reject do |var|
# internal variable
var == "text"
end if context.environments.present?
vars += context.scopes.collect(&:keys).flatten
vars.uniq.sort
end
# DEPRACATED: This is just a hint on how to use Liquid introspection
register "macro_list",
"Use '{{ variables | to_list: \"Variables:\" }}' to see all Liquid variables and '{{ tags | to_list: \"Tags:\" }}' to see all of the Liquid tags."
end
end
end