compute() {
let { _parentValue, _propertyKey } = this;
if (DEBUG) {
(this.tag.inner as TwoWayFlushDetectionTag).didCompute(_parentValue);
}
let parent: any;
let tracker: any;
if (EMBER_METAL_TRACKED_PROPERTIES) {
parent = getCurrentTracker();
tracker = setCurrentTracker();
}
let ret = get(_parentValue, _propertyKey);
if (EMBER_METAL_TRACKED_PROPERTIES) {
setCurrentTracker(parent!);
let tag = tracker!.combine();
if (parent) parent.add(tag);
this._propertyTag.inner.update(tag);
}
return ret;
}
compute() {
let { _parentReference, _propertyTag, _propertyKey } = this;
let parentValue = _parentReference.value();
let parentValueType = typeof parentValue;
if (parentValueType === 'string' && _propertyKey === 'length') {
return parentValue.length;
}
if ((parentValueType === 'object' && parentValue !== null) || parentValueType === 'function') {
if (DEBUG) {
watchKey(parentValue, _propertyKey);
}
if (DEBUG) {
(this.tag.inner as TwoWayFlushDetectionTag).didCompute(parentValue);
}
let parent: any;
let tracker: any;
if (EMBER_METAL_TRACKED_PROPERTIES) {
parent = getCurrentTracker();
tracker = setCurrentTracker();
}
let ret = get(parentValue, _propertyKey);
if (EMBER_METAL_TRACKED_PROPERTIES) {
setCurrentTracker(parent!);
let tag = tracker!.combine();
if (parent) parent.add(tag);
_propertyTag.inner.update(tag);
} else {
_propertyTag.inner.update(tagForProperty(parentValue, _propertyKey));
}
return ret;
} else {
return undefined;
}
}