Ember.Editable mixin

Ember.Editable.js

Ember.Editable = Ember.Mixin.create({
    _originalPropertyStates: Ember.Map.create(),
    _isEditing: false,

    willDestroy: function () {
        var $this = this;
        for (var prop in this.getOwnProperties()) {
            Ember.removeBeforeObserver($this, prop, $this, '_beforePropertyChange');
            //Ember.removeObserver($this, prop, $this, '_propertyChanged');
        }
    },

    startEditing: function () {
        if (this.get('_isEditing')) {
            return;
        }
        this.set('_isEditing', true);
        this.set('_originalPropertyStates', Ember.Map.create());
        var $this = this;
        for (var prop in this.getOwnProperties()) {
            Ember.addBeforeObserver($this, prop, $this, '_beforePropertyChange');
            //Ember.addObserver($this, prop, $this, '_propertyChanged');
        }
    },

    _beforePropertyChange: function (obj, propName) {
        var origProps = this.get('_originalPropertyStates');
        if (!origProps.has(propName)) {
            origProps.set(propName, Ember.get(obj, propName));
            this.notifyPropertyChange('isDirty');
        }
    },

    cancelEditing: function () {
        var $this = this;
        this.get('_originalPropertyStates').forEach(function (key, value) {
            $this.set(key, value);
        });
        this.endEditing();
    },

    endEditing: function () {
        this.set('_isEditing', false);
        var $this = this;
        for (var prop in this.getOwnProperties()) {
            Ember.removeBeforeObserver($this, prop, $this, '_beforePropertyChange');
        }
        this.set('_originalPropertyStates', Ember.Map.create());
    },

    dirtyProps: function () {
        if (!this.get('_isEditing')) {
            return Ember.A();
        }

        return this.get('_originalPropertyStates.keys.list');
    }.property(),

    isDirty: function () {
        if (!this.get('_isEditing')) {
            return false;
        }

        var changedPropKeys = this.get('_originalPropertyStates.keys');
        if (!Ember.empty(changedPropKeys)) {
            return !changedPropKeys.isEmpty();
        }
        return false;
    }.property()
});