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Contents
=begin rdoc
Allow delayed actions to be describe and run only after
the initialize block has completed.
Usage:
class Test
include Delayed
def initialize(&block)
instance_eval &block if block
loaded = true
run_after_loaded do |b|
instance_eval &b if b
end
end
end
=end
class DelayedProc < Proc
def initialize(proxy, &block)
@proxy = proxy
@proc = block
end
def result
@result ||= @proc.call
end
def method_missing(m,*a,&block)
result.send(m,*a,&block)
end
end
module Delayed
module ClassMethods
def delayed_calls
@delayed_calls ||= {}
end
end
module InstanceMethods
def loaded
@loaded ||= false
end
def loaded!
@loaded = true
end
def run_after_loaded(&block)
self.class.delayed_calls.each do |k,b|
self.class.delayed_calls[block.object_id] ||= b.result(&block) if b && b.is_a?(Proc)
end
end
def delayed_action(&block)
if loaded
self.class.delayed_calls[block.object_id] ||= block.call
else
self.class.delayed_calls[block.object_id] = DelayedProc.new(self, &block) if block
end
end
end
def self.included(receiver)
receiver.extend ClassMethods
receiver.send :include, InstanceMethods
end
end
Version data entries
28 entries across 28 versions & 3 rubygems