mframejs
Version:
simple framework
75 lines • 2.85 kB
JavaScript
import { ClassPropertyObserver } from './classPropertyObserver';
import { Cache } from '../../utils/exported';
const emptyObject = class {
};
export class ClassPropertyObserverCreator {
static create(_class, observerKey, caller) {
this.classRef = _class && _class.$context;
this.keyParts = Cache.keyMaps.getCreate(observerKey);
this.keyNo = 0;
this.keyBlock = this.keyParts[this.keyNo];
ClassPropertyObserverCreator.processKeys(caller);
ClassPropertyObserverCreator.clear();
}
static remove(_class, observerKey, caller) {
this.classRef = _class && _class.$context;
this.keyParts = Cache.keyMaps.getCreate(observerKey);
this.keyNo = 0;
this.keyBlock = this.keyParts && this.keyParts[this.keyNo];
ClassPropertyObserverCreator.removeKeys(caller);
ClassPropertyObserverCreator.clear();
}
static clear() {
this.classRef = null;
this.keyParts = null;
this.keyNo = null;
this.keyBlock = null;
}
static nextKey() {
this.keyNo++;
this.keyBlock = this.keyParts[this.keyNo];
}
static processKeys(caller) {
if (!this.classRef.__observer) {
Object.defineProperty(this.classRef, '__observer', {
writable: true,
configurable: true,
value: new emptyObject()
});
}
if (!this.classRef.__observer[this.keyBlock]) {
this.classRef.__observer[this.keyBlock] = new ClassPropertyObserver(this.classRef, this.keyBlock);
this.classRef.__observer[this.keyBlock].subscribe(caller);
}
else {
this.classRef.__observer[this.keyBlock].subscribe(caller);
this.classRef.__observer[this.keyBlock].observe();
}
if (this.keyNo !== this.keyParts.length - 1 && this.keyParts.length > 1) {
if (this.classRef) {
this.classRef = this.classRef[this.keyBlock];
}
this.nextKey();
if (this.classRef) {
this.processKeys(caller);
}
}
}
static removeKeys(caller) {
if (this.classRef && this.classRef.__observer) {
if (this.classRef.__observer[this.keyBlock]) {
this.classRef.__observer[this.keyBlock].unsubscribe(caller);
}
}
if (this.keyNo !== this.keyParts.length - 1 && this.keyParts.length > 1) {
if (this.classRef) {
this.classRef = this.classRef[this.keyBlock];
}
this.nextKey();
if (this.classRef) {
this.removeKeys(caller);
}
}
}
}
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