145 lines
3.9 KiB
JavaScript
145 lines
3.9 KiB
JavaScript
/*
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* (c) Copyright Ascensio System SIA 2010-2024
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
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* street, Riga, Latvia, EU, LV-1050.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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"use strict";
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(function(){
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window.AscEmbed = window.AscEmbed || {};
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function GlobalScrollLocker()
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{
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this.frames = [];
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this.x = window.scrollX;
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this.y = window.scrollY;
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this.lockCounter = 0;
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window.addEventListener("scroll", this.onScroll.bind(this), true);
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}
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GlobalScrollLocker.prototype.onScroll = function()
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{
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let isPrevent = false;
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if (0 !== this.lockCounter)
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isPrevent = true;
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if (!isPrevent)
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{
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for (let i = 0, len = this.frames.length; i < len; i++)
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{
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if (document.activeElement === this.frames[i])
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{
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isPrevent = true;
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this.lockWithTimeout(500);
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break;
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}
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}
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}
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if (isPrevent)
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{
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window.scrollTo(this.x, this.y);
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return;
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}
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this.x = window.scrollX;
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this.y = window.scrollY;
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};
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GlobalScrollLocker.prototype.push = function(frame)
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{
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this.frames.push(frame);
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};
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GlobalScrollLocker.prototype.lockWithTimeout = function(interval)
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{
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this.lockCounter++;
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var _t = this;
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setTimeout(function(){
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_t.lockCounter--;
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}, interval);
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};
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function ScrollLocker(frame)
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{
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this.frame = frame;
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if (!window.AscEmbed.AscEmbedGlobalScroller)
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window.AscEmbed.AscEmbedGlobalScroller = new GlobalScrollLocker();
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window.AscEmbed.AscEmbedGlobalScroller.push(this.frame);
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window.addEventListener("blur", this.onBlur.bind(this), false);
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window.addEventListener("pointermove", this.onMove.bind(this), false);
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window.addEventListener("wheel", this.onMove.bind(this), false);
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this.frame.addEventListener("pointerover", this.onOver.bind(this), false);
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this.frame.addEventListener("pointerleave", this.onLeave.bind(this), false);
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}
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ScrollLocker.prototype.onBlur = function()
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{
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if (document.activeElement === this.frame)
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{
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window.AscEmbed.AscEmbedGlobalScroller.lockWithTimeout(500);
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}
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};
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ScrollLocker.prototype.onOver = function()
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{
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};
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ScrollLocker.prototype.onLeave = function()
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{
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window.AscEmbed.AscEmbedGlobalScroller.lockWithTimeout(100);
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this.frame.blur();
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};
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ScrollLocker.prototype.onMove = function()
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{
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if (document.activeElement === this.frame)
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{
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window.AscEmbed.AscEmbedGlobalScroller.lockWithTimeout(100);
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this.frame.blur();
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}
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};
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window.AscEmbed.initWorker = function(frame)
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{
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window.AscEmbed.workers = window.AscEmbed.workers || [];
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let worker = new ScrollLocker(frame);
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window.AscEmbed.workers.push(worker);
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return worker;
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};
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})();
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