89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {BaseObservableMap} from "./BaseObservableMap.js";
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export class ApplyMap extends BaseObservableMap {
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constructor(source, apply) {
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super();
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this._source = source;
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this._apply = apply;
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this._subscription = null;
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}
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setApply(apply) {
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this._apply = apply;
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if (apply) {
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this.applyOnce(this._apply);
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}
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}
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applyOnce(apply) {
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for (const [key, value] of this._source) {
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apply(key, value);
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}
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}
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onAdd(key, value) {
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if (this._apply) {
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this._apply(key, value);
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}
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this.emitAdd(key, value);
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}
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onRemove(key, value) {
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this.emitRemove(key, value);
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}
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onUpdate(key, value, params) {
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if (this._apply) {
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this._apply(key, value, params);
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}
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this.emitUpdate(key, value, params);
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}
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onSubscribeFirst() {
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this._subscription = this._source.subscribe(this);
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if (this._apply) {
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this.applyOnce(this._apply);
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}
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super.onSubscribeFirst();
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}
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onUnsubscribeLast() {
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super.onUnsubscribeLast();
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this._subscription = this._subscription();
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}
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onReset() {
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if (this._apply) {
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this.applyOnce(this._apply);
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}
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this.emitReset();
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}
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[Symbol.iterator]() {
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return this._source[Symbol.iterator]();
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}
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get size() {
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return this._source.size;
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}
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get(key) {
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return this._source.get(key);
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}
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}
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