org.extex.interpreter.context.observer.code
Interface CodeObservable

All Known Implementing Classes:

ContextExtensionImpl, ContextImpl

public interface CodeObservable

This interface describes the possibility to register an observer for an code change event.

Version:

$Revision$

Author:

Gerd Neugebauer

Method Summary

void	registerCodeChangeObserver(Token token, CodeObserver observer) Register an observer for code change events.
void	unregisterCodeChangeObserver(Token name, CodeObserver observer) Remove a registered observer for code change events.

Method Detail

registerCodeChangeObserver

void registerCodeChangeObserver(Token token,
                                CodeObserver observer)

Register an observer for code change events. Code change events are triggered when the assignment of a macro or active character changes. In this case the appropriate method in the observer is invoked.

Parameters:

token - the token to be observed. This should be a macro or active character token.

observer - the observer to receive the events

unregisterCodeChangeObserver

void unregisterCodeChangeObserver(Token name,
                                  CodeObserver observer)

Remove a registered observer for code change events. Code change events are triggered when the assignment of a macro or active character changes. In this case the appropriate method in the observer is invoked.

Parameters:

name - the token to be observed. This should be a macro or active character token.

observer - the observer to receive the events