153 lines
4.4 KiB
JavaScript
153 lines
4.4 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(window)
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{
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/**
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* Данный класс считает количество графем у заданной строки в заданном шрифте
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* @constructor
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*/
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function CGraphemesCounter()
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{
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AscFonts.CTextShaper.call(this);
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this.TextPr = null;
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this.CharsCount = 0;
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this.TrimResult = null;
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this.TrimLength = 0;
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}
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CGraphemesCounter.prototype = Object.create(AscFonts.CTextShaper.prototype);
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CGraphemesCounter.prototype.constructor = CGraphemesCounter;
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CGraphemesCounter.prototype.GetCount = function(sString, oTextPr)
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{
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this.Init();
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if (oTextPr)
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this.TextPr = oTextPr;
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else
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this.TextPr = null;
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this.CharsCount = 0;
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this.TrimResult = null;
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this.Shape(sString);
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return this.CharsCount;
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};
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CGraphemesCounter.prototype.Trim = function(sString, nLen, oTextPr)
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{
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this.Init();
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if (oTextPr)
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this.TextPr = oTextPr;
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else
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this.TextPr = null;
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this.CharsCount = 0;
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this.TrimResult = [];
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this.TrimLength = nLen;
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this.Shape(sString);
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return (typeof(sString) === "string" ? String.fromCodePoint.apply(String, this.TrimResult) : this.TrimResult);
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};
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CGraphemesCounter.prototype.Init = function()
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{
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this.ClearBuffer();
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};
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CGraphemesCounter.prototype.Shape = function(sString)
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{
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if (typeof(sString) === "string")
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{
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for (let oIter = sString.getUnicodeIterator(); oIter.check(); oIter.next())
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{
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this.HandleCodePoint(oIter.value());
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}
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}
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else if (Array.isArray(sString))
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{
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for (let nPos = 0, nCount = sString.length; nPos < nCount; ++nPos)
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{
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this.HandleCodePoint(sString[nPos]);
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}
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}
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this.FlushWord();
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};
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CGraphemesCounter.prototype.HandleCodePoint = function(nCodePoint)
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{
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if (AscCommon.IsSpace(nCodePoint))
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{
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this.FlushWord();
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if (this.TrimResult && this.CharsCount < this.TrimLength)
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this.TrimResult.push(nCodePoint);
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this.CharsCount++;
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}
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else
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{
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this.AppendToString(nCodePoint);
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}
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};
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CGraphemesCounter.prototype.GetFontInfo = function(nFontSlot)
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{
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if (this.TextPr)
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return this.TextPr.GetFontInfo(nFontSlot);
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return AscFonts.DEFAULT_TEXTFONTINFO;
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};
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CGraphemesCounter.prototype.FlushGrapheme = function(nGrapheme, nWidth, nCodePointsCount, isLigature)
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{
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if (this.TrimResult && this.CharsCount < this.TrimLength)
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{
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let nCount = 0;
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if (isLigature)
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nCount = Math.min(this.TrimLength - this.CharsCount, nCodePointsCount);
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else
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nCount = nCodePointsCount;
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for (let nPos = 0; nPos < nCount; ++nPos)
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{
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this.TrimResult.push(this.GetCodePoint(this.Buffer[this.BufferIndex + nPos]));
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}
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}
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this.CharsCount += isLigature ? nCodePointsCount : 1;
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this.BufferIndex += nCodePointsCount;
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}
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//--------------------------------------------------------export----------------------------------------------------
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window['AscWord'] = window['AscWord'] || {};
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window['AscWord'].GraphemesCounter = new CGraphemesCounter();
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})(window);
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