Skull

---

Application pattern library for Backbone

Command

A pattern for carrying out application wide actions. Consists of a Command Map that maps commands to application events

var CommandMap = Skull.CommandMap;
CommandMap.addCommand("Memento:Undo", UndoCommand);

and a Command object

var command = Skull.Command.extend({
        execute: function() {
            model.set({'name':'Bob'});
        }
    });

Memento

A pattern for storing and restoring application state ( Undo / Redo ). Consists of a Memento object,

var memento = new Skull.Memento({
        'originator': this,
        'state': this.toJSON()
    });

an Originator object

var originator = new Skull.Originator();
var memento = originator.createMemento();
originator.setMemento(memento);

and a CareTaker object

var careTaker = Skull.CareTaker;
careTaker.addMemento(memento);
careTaker.undo();
careTaker.redo();

Observer

A pattern for application wide communication

var EventMap = Skull.EventMap;
EventMap.subscribe("Memento:Undo", UndoManager.undo);
EventMap.publish("Memento:Undo");
EventMap.unsubscribe("Memento:Undo", UndoManager.undo);