DocumentServer-v-9.2.0/sdkjs/common/Drawings/Hit.js

/*
 * (c) Copyright Ascensio System SIA 2010-2024
 *
 * 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 20A-6 Ernesta Birznieka-Upish
 * street, Riga, Latvia, EU, LV-1050.
 *
 * 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){
    // Import
    var global_mouseEvent = AscCommon.global_mouseEvent;
    var DIST_HIT_IN_LINE = 1.5;
function HitInLine(context, px, py, x0, y0, x1, y1)
{
   /* var l = Math.min(x0, x1);
    var t = Math.min(y0, y1);
    var r = Math.max(x0, x1);
    var b = Math.max(y0, y1);
    if(px < l || px > r || py < t || py > b)
        return false;*/
    var tx, ty, dx, dy, d;
    tx=x1-x0;
    ty=y1-y0;

    d=AscFormat.DIST_HIT_IN_LINE/Math.sqrt(tx*tx+ty*ty);

    if(typeof global_mouseEvent !== "undefined" && AscCommon.isRealObject(global_mouseEvent) && AscFormat.isRealNumber(global_mouseEvent.KoefPixToMM))
    {
        d *= global_mouseEvent.KoefPixToMM;
    }

    if (global_mouseEvent && global_mouseEvent.AscHitToHandlesEpsilon)
    {
        d = global_mouseEvent.AscHitToHandlesEpsilon/Math.sqrt(tx*tx+ty*ty);
    }

    dx=-ty*d;
    dy=tx*d;

    context.beginPath();
    context.moveTo(x0, y0);
    context.lineTo(x0+dx, y0+dy);
    context.lineTo(x1+dx, y1+dy);
    context.lineTo(x1-dx, y1-dy);
    context.lineTo(x0-dx, y0-dy);
    context.closePath();
    return context.isPointInPath(px, py);
}

function HitInBezier4(context, px, py, x0, y0, x1, y1, x2, y2, x3, y3)
{
    var l = Math.min(x0, x1, x2, x3);
    var t = Math.min(y0, y1, y2, y3);
    var r = Math.max(x0, x1, x2, x3);
    var b = Math.max(y0, y1, y2, y3);
    var d = 0;
    if(px < l - AscFormat.DIST_HIT_IN_LINE || px > r + AscFormat.DIST_HIT_IN_LINE || py < t - AscFormat.DIST_HIT_IN_LINE || py > b + AscFormat.DIST_HIT_IN_LINE)
        return false;
    var tx, ty, dx, dy;
    tx=x3-x0;
    ty=y3-y0;
    if(AscFormat.fApproxEqual(l, r) || AscFormat.fApproxEqual(t, b)) {
        d=AscFormat.DIST_HIT_IN_LINE/Math.sqrt(tx*tx+ty*ty);
    }
    d=AscFormat.DIST_HIT_IN_LINE/Math.sqrt(tx*tx+ty*ty);

    if(typeof global_mouseEvent !== "undefined" && AscCommon.isRealObject(global_mouseEvent) && AscFormat.isRealNumber(global_mouseEvent.KoefPixToMM))
    {
        d *= global_mouseEvent.KoefPixToMM;
    }

    if (global_mouseEvent && global_mouseEvent.AscHitToHandlesEpsilon)
    {
        d = global_mouseEvent.AscHitToHandlesEpsilon/Math.sqrt(tx*tx+ty*ty);
    }

    dx=-ty*d;
    dy=tx*d;

    context.beginPath();
    context.moveTo(x0, y0);
    context.lineTo(x0+dx, y0+dy);
    context.bezierCurveTo(x1+dx, y1+dy, x2+dx, y2+dy, x3+dx, y3+dy);
    context.lineTo(x3-dx, y3-dy);
    context.bezierCurveTo(x2-dx, y2-dy, x1-dx, y1-dy, x0-dx, y0-dy);
    context.closePath();
    return context.isPointInPath(px, py);
}

function HitInBezier3(context, px, py, x0, y0, x1, y1, x2, y2)
{
    var l = Math.min(x0, x1, x2);
    var t = Math.min(y0, y1, y2);
    var r = Math.max(x0, x1, x2);
    var b = Math.max(y0, y1, y2);
    if(px < l || px > r || py < t || py > b)
        return false;
    var tx, ty, dx, dy, d;
    tx=x2-x0;
    ty=y2-y0;

    d=AscFormat.DIST_HIT_IN_LINE/Math.sqrt(tx*tx+ty*ty);

    if(typeof global_mouseEvent !== "undefined" && AscCommon.isRealObject(global_mouseEvent) && AscFormat.isRealNumber(global_mouseEvent.KoefPixToMM))
    {
        d *= global_mouseEvent.KoefPixToMM;
    }

    if (global_mouseEvent && global_mouseEvent.AscHitToHandlesEpsilon)
    {
        d = global_mouseEvent.AscHitToHandlesEpsilon/Math.sqrt(tx*tx+ty*ty);
    }

    dx=-ty*d;
    dy=tx*d;

    context.beginPath();
    context.moveTo(x0, y0);
    context.lineTo(x0+dx, y0+dy);
    context.quadraticCurveTo(x1+dx, y1+dy, x2+dx, y2+dy);
    context.lineTo(x2-dx, y2-dy);
    context.quadraticCurveTo(x1-dx, y1-dy, x0-dx, y0-dy);
    context.closePath();
    return context.isPointInPath(px, py);
}

    //--------------------------------------------------------export----------------------------------------------------
    window['AscFormat'] = window['AscFormat'] || {};
    window['AscFormat'].HitInLine = HitInLine;
    window['AscFormat'].HitInBezier4 = HitInBezier4;
    window['AscFormat'].HitInBezier3 = HitInBezier3;
    window['AscFormat'].DIST_HIT_IN_LINE = DIST_HIT_IN_LINE;
})(window);