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Contents
module Safubot
##
# A mixin granting simple event firing and handler binding.
module Evented
##
# Binds an event handler, which is a Hash of the form:
#
# { :evid => Symbol, :id => Symbol, :repeat => Boolean, :proc => Proc }
#
# See Evented#on and Evented#once for sugar.
def bind(evid, handler)
@handlers ||= {}
@handlers[evid] ||= {}
handler[:evid] = evid
handler[:id] ||= @handlers[evid].length
@handlers[evid][handler[:id]] = handler
end
##
# Unbinds the given handler.
def unbind(handler)
@handlers[handler[:evid]].delete(handler[:id])
end
##
# Binds a block to the specified event id.
# Returns the bound handler.
def on(evid, opts={}, &callback)
bind(evid, { :repeat => true, :proc => callback }.merge(opts))
end
##
# Binds a block to the specified event id, to be executed only once.
# Returns the bound handler.
def once(evid, opts={}, &callback)
bind(evid, { :repeat => false, :proc => callback }.merge(opts))
end
##
# Fires an evid event with the given arguments.
def emit(evid, *args)
return unless @handlers && @handlers[evid]
@handlers[evid].each do |id, handler|
begin
handler[:proc].call(*args)
ensure
@handlers[evid].delete(id) if !handler[:repeat]
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems