73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
/* Copyright 2017 Mozilla Foundation
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 { getGlobalEventBus } from './dom_events';
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class PDFHistory {
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constructor({ linkService, eventBus, }) {
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this.linkService = linkService;
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this.eventBus = eventBus || getGlobalEventBus();
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}
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initialize(fingerprint, resetHistory = false) {}
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push() {}
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back() {}
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forward() {}
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}
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function isDestsEqual(firstDest, secondDest) {
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function isEntryEqual(first, second) {
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if (typeof first !== typeof second) {
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return false;
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}
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if (first instanceof Array || second instanceof Array) {
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return false;
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}
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if (first !== null && typeof first === 'object' && second !== null) {
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if (Object.keys(first).length !== Object.keys(second).length) {
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return false;
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}
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for (var key in first) {
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if (!isEntryEqual(first[key], second[key])) {
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return false;
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}
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}
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return true;
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}
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return first === second || (Number.isNaN(first) && Number.isNaN(second));
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}
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if (!(firstDest instanceof Array && secondDest instanceof Array)) {
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return false;
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}
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if (firstDest.length !== secondDest.length) {
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return false;
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}
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for (let i = 0, ii = firstDest.length; i < ii; i++) {
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if (!isEntryEqual(firstDest[i], secondDest[i])) {
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return false;
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}
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}
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return true;
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}
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export {
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PDFHistory,
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isDestsEqual,
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};
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