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-rw-r--r--ruby_1_8_6/lib/test/unit/util/observable.rb90
1 files changed, 0 insertions, 90 deletions
diff --git a/ruby_1_8_6/lib/test/unit/util/observable.rb b/ruby_1_8_6/lib/test/unit/util/observable.rb
deleted file mode 100644
index 3567d34271..0000000000
--- a/ruby_1_8_6/lib/test/unit/util/observable.rb
+++ /dev/null
@@ -1,90 +0,0 @@
-#--
-#
-# Author:: Nathaniel Talbott.
-# Copyright:: Copyright (c) 2000-2002 Nathaniel Talbott. All rights reserved.
-# License:: Ruby license.
-
-require 'test/unit/util/procwrapper'
-
-module Test
- module Unit
- module Util
-
- # This is a utility class that allows anything mixing
- # it in to notify a set of listeners about interesting
- # events.
- module Observable
- # We use this for defaults since nil might mean something
- NOTHING = "NOTHING/#{__id__}"
-
- # Adds the passed proc as a listener on the
- # channel indicated by channel_name. listener_key
- # is used to remove the listener later; if none is
- # specified, the proc itself is used.
- #
- # Whatever is used as the listener_key is
- # returned, making it very easy to use the proc
- # itself as the listener_key:
- #
- # listener = add_listener("Channel") { ... }
- # remove_listener("Channel", listener)
- def add_listener(channel_name, listener_key=NOTHING, &listener) # :yields: value
- unless(block_given?)
- raise ArgumentError.new("No callback was passed as a listener")
- end
-
- key = listener_key
- if (listener_key == NOTHING)
- listener_key = listener
- key = ProcWrapper.new(listener)
- end
-
- channels[channel_name] ||= {}
- channels[channel_name][key] = listener
- return listener_key
- end
-
- # Removes the listener indicated by listener_key
- # from the channel indicated by
- # channel_name. Returns the registered proc, or
- # nil if none was found.
- def remove_listener(channel_name, listener_key)
- channel = channels[channel_name]
- return nil unless (channel)
- key = listener_key
- if (listener_key.instance_of?(Proc))
- key = ProcWrapper.new(listener_key)
- end
- if (channel.has_key?(key))
- return channel.delete(key)
- end
- return nil
- end
-
- # Calls all the procs registered on the channel
- # indicated by channel_name. If value is
- # specified, it is passed in to the procs,
- # otherwise they are called with no arguments.
- #
- #--
- #
- # Perhaps this should be private? Would it ever
- # make sense for an external class to call this
- # method directly?
- def notify_listeners(channel_name, *arguments)
- channel = channels[channel_name]
- return 0 unless (channel)
- listeners = channel.values
- listeners.each { |listener| listener.call(*arguments) }
- return listeners.size
- end
-
- private
- def channels
- @channels ||= {}
- return @channels
- end
- end
- end
- end
-end