120 lines
4.1 KiB
JavaScript
120 lines
4.1 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 CCacheImage()
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{
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this.image = null;
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this.image_locked = 0;
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this.image_unusedCount = 0;
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}
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function CCacheManager(isSlides)
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{
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this.isSlides = !!isSlides;
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this.arrayImages = [];
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this.arrayCount = 0;
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this.countValidImage = 1;
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}
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CCacheManager.prototype.CheckImagesForNeed = function()
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{
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for (var i = 0; i < this.arrayCount; ++i)
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{
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if ((this.arrayImages[i].image_locked == 0) && (this.arrayImages[i].image_unusedCount >= this.countValidImage))
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{
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delete this.arrayImages[i].image;
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this.arrayImages.splice(i, 1);
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--i;
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--this.arrayCount;
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}
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}
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};
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CCacheManager.prototype.UnLock = function(_cache_image)
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{
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if (null == _cache_image)
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return;
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_cache_image.image_locked = 0;
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_cache_image.image_unusedCount = 0;
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// затем нужно сбросить ссылку в ноль (_cache_image = null) <- это обязательно !!!!!!!
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};
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CCacheManager.prototype.Lock = function (_w, _h, _drDocument)
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{
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if (_w <= 0) _w = 1;
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if (_h <= 0) _h = 1;
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var backgroundColor = this.isSlides ? "#B0B0B0" : "#FFFFFF";
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if (_drDocument)
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{
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var backColor = _drDocument.m_oWordControl.m_oApi.getPageBackgroundColor();
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backgroundColor = "#" + backColor.R.toString(16) + backColor.G.toString(16) + backColor.B.toString(16);
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}
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for (var i = 0; i < this.arrayCount; ++i)
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{
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if (this.arrayImages[i].image_locked)
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continue;
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var _wI = this.arrayImages[i].image.width;
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var _hI = this.arrayImages[i].image.height;
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if ((_wI == _w) && (_hI == _h))
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{
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this.arrayImages[i].image_locked = 1;
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this.arrayImages[i].image_unusedCount = 0;
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this.arrayImages[i].image.ctx.globalAlpha = 1.0;
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this.arrayImages[i].image.ctx.setTransform(1, 0, 0, 1, 0, 0);
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this.arrayImages[i].image.ctx.fillStyle = backgroundColor;
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this.arrayImages[i].image.ctx.fillRect(0, 0, _w, _h);
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return this.arrayImages[i];
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}
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this.arrayImages[i].image_unusedCount++;
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}
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this.CheckImagesForNeed();
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var index = this.arrayCount;
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this.arrayCount++;
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this.arrayImages[index] = new CCacheImage();
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this.arrayImages[index].image = document.createElement('canvas');
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this.arrayImages[index].image.width = _w;
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this.arrayImages[index].image.height = _h;
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this.arrayImages[index].image.ctx = AscCommon.AscBrowser.getContext2D(this.arrayImages[index].image);
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this.arrayImages[index].image.ctx.globalAlpha = 1.0;
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this.arrayImages[index].image.ctx.setTransform(1, 0, 0, 1, 0, 0);
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this.arrayImages[index].image.ctx.fillStyle = backgroundColor;
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this.arrayImages[index].image.ctx.fillRect(0, 0, _w, _h);
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this.arrayImages[index].image_locked = 1;
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this.arrayImages[index].image_unusedCount = 0;
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return this.arrayImages[index];
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};
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