/*
 * (c) Copyright Ascensio System SIA 2010-2015
 *
 * This program is a free software product. You can redistribute it and/or 
 * modify it under the terms of the GNU Affero General Public License (AGPL) 
 * version 3 as published by the Free Software Foundation. In accordance with 
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect 
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied 
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For 
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
 * EU, LV-1021.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under 
 * Section 5 of the GNU AGPL version 3.
 *
 * Pursuant to Section 7(b) of the License you must retain the original Product
 * logo when distributing the program. Pursuant to Section 7(e) we decline to
 * grant you any rights under trademark law for use of our trademarks.
 *
 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International. See the License
 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 */
 "use strict";
(function (window, undefined) {
    var asc = window["Asc"];
    var asc_lastindexof = asc.lastIndexOf;
    function CharOffset(left, top, height, line) {
        this.left = left;
        this.top = top;
        this.height = height;
        this.lineIndex = line;
    }
    function CellTextRender(drawingCtx) {
        CellTextRender.superclass.constructor.call(this, drawingCtx);
        this.reWordBegining = XRegExp("[^\\p{L}\\p{N}][\\p{L}\\p{N}]", "i");
        return this;
    }
    asc.extendClass(CellTextRender, asc.StringRender);
    CellTextRender.prototype.getLinesCount = function () {
        return this.lines.length;
    };
    CellTextRender.prototype.getLineInfo = function (index) {
        return this.lines.length > 0 && index >= 0 && index < this.lines.length ? this.lines[index] : null;
    };
    CellTextRender.prototype.calcLineOffset = function (index) {
        for (var i = 0, h = 0, l = this.lines; i < index; ++i) {
            h += l[i].th;
        }
        return h;
    };
    CellTextRender.prototype.getPrevChar = function (pos) {
        return pos <= 0 ? 0 : pos <= this.chars.length ? pos - 1 : this.chars.length;
    };
    CellTextRender.prototype.getNextChar = function (pos) {
        return pos >= this.chars.length ? this.chars.length : pos >= 0 ? pos + 1 : 0;
    };
    CellTextRender.prototype.getPrevWord = function (pos) {
        var i = asc_lastindexof(this.chars.slice(0, pos), this.reWordBegining);
        return i >= 0 ? i + 1 : 0;
    };
    CellTextRender.prototype.getNextWord = function (pos) {
        var i = this.chars.slice(pos).search(this.reWordBegining);
        return i >= 0 ? pos + (i + 1) : this.getEndOfLine(pos);
    };
    CellTextRender.prototype.getBeginOfLine = function (pos) {
        pos = pos < 0 ? 0 : Math.min(pos, this.chars.length);
        for (var l = this.lines, i = 0; i < l.length; ++i) {
            if (pos >= l[i].beg && pos <= l[i].end) {
                return l[i].beg;
            }
        }
        var lastLine = l.length - 1;
        var lastChar = this.chars.length - 1;
        return this.charWidths[lastChar] !== 0 ? l[lastLine].beg : pos;
    };
    CellTextRender.prototype.getEndOfLine = function (pos) {
        pos = pos < 0 ? 0 : Math.min(pos, this.chars.length);
        var l = this.lines;
        var lastLine = l.length - 1;
        for (var i = 0; i < lastLine; ++i) {
            if (pos >= l[i].beg && pos <= l[i].end) {
                return l[i].end;
            }
        }
        var lastChar = this.chars.length - 1;
        return pos > lastChar ? pos : lastChar + (this.charWidths[lastChar] !== 0 ? 1 : 0);
    };
    CellTextRender.prototype.getBeginOfText = function () {
        return 0;
    };
    CellTextRender.prototype.getEndOfText = function () {
        return this.chars.length;
    };
    CellTextRender.prototype.getPrevLine = function (pos) {
        pos = pos < 0 ? 0 : Math.min(pos, this.chars.length);
        for (var l = this.lines, i = 0; i < l.length; ++i) {
            if (pos >= l[i].beg && pos <= l[i].end) {
                return i <= 0 ? 0 : Math.min(l[i - 1].beg + pos - l[i].beg, l[i - 1].end);
            }
        }
        var lastLine = l.length - 1;
        var lastChar = this.chars.length - 1;
        return this.charWidths[lastChar] === 0 || l.length < 2 ? (0 > lastLine ? 0 : l[lastLine].beg) : lastChar > 0 ? Math.min(l[lastLine - 1].beg + pos - l[lastLine].beg, l[lastLine - 1].end) : 0;
    };
    CellTextRender.prototype.getNextLine = function (pos) {
        pos = pos < 0 ? 0 : Math.min(pos, this.chars.length);
        var l = this.lines;
        var lastLine = l.length - 1;
        for (var i = 0; i < lastLine; ++i) {
            if (pos >= l[i].beg && pos <= l[i].end) {
                return Math.min(l[i + 1].beg + pos - l[i].beg, l[i + 1].end);
            }
        }
        return this.chars.length;
    };
    CellTextRender.prototype.getCharInfo = function (pos) {
        for (var p = this.charProps[pos];
        (!p || !p.font) && pos > 0; --pos) {
            p = this.charProps[pos - 1];
        }
        return {
            fsz: p.font.FontSize,
            dh: p && p.lm && p.lm.bl2 > 0 ? p.lm.bl2 - p.lm.bl : 0,
            h: p && p.lm ? p.lm.th : 0
        };
    };
    CellTextRender.prototype.charOffset = function (pos, lineIndex, h) {
        var li = this.lines[lineIndex];
        return new CharOffset(li.startX + (pos > 0 ? this._calcCharsWidth(li.beg, pos - 1) : 0), h, li.th, lineIndex);
    };
    CellTextRender.prototype.calcCharOffset = function (pos) {
        var t = this,
        l = t.lines,
        i, h, co;
        if (l.length < 1) {
            return null;
        }
        if (pos < 0) {
            pos = 0;
        }
        if (pos > t.chars.length) {
            pos = t.chars.length;
        }
        for (i = 0, h = 0; i < l.length; ++i) {
            if (pos >= l[i].beg && pos <= l[i].end) {
                return this.charOffset(pos, i, h);
            }
            if (i !== l.length - 1) {
                h += l[i].th;
            }
        }
        co = this.charOffset(pos, i - 1, h);
        if (t.charWidths[t.chars.length - 1] === 0) {
            co.left = null;
            co.top += l[i - 1].th;
            co.lineIndex++;
        }
        return co;
    };
    CellTextRender.prototype.calcCharHeight = function (pos) {
        var t = this;
        for (var p = t.charProps[pos];
        (!p || !p.font) && pos > 0; --pos) {
            p = t.charProps[pos - 1];
        }
        return t._calcLineMetrics(p.fsz !== undefined ? p.fsz : p.font.FontSize, p.va, p.fm, t.drawingCtx.getPPIY());
    };
    CellTextRender.prototype.getCharsCount = function () {
        return this.chars.length;
    };
    CellTextRender.prototype.getChars = function (pos, len) {
        return this.chars.slice(pos, pos + len);
    };
    CellTextRender.prototype.getCharWidth = function (pos) {
        return this.charWidths[pos];
    };
    CellTextRender.prototype.isLastCharNL = function () {
        return this.charWidths[this.chars.length - 1] === 0;
    };
    window["Asc"].CellTextRender = CellTextRender;
})(window);