gojs/extensionsTS/ParallelRouteLink.js

/*
*  Copyright (C) 1998-2021 by Northwoods Software Corporation. All Rights Reserved.
*/
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "../release/go.js"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.ParallelRouteLink = void 0;
    /*
    * This is an extension and not part of the main GoJS library.
    * Note that the API for this class may change with any version, even point releases.
    * If you intend to use an extension in production, you should copy the code to your own source directory.
    * Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
    * See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
    */
    var go = require("../release/go.js");
    /**
     * This custom {@link Link} class customizes its route to go parallel to other links connecting the same ports,
     * if the link is not orthogonal and is not Bezier curved.
     *
     * If you want to experiment with this extension, try the <a href="../../extensionsJSM/ParallelRoute.html">Parallel Route Links</a> sample.
     * @category Part Extension
     */
    var ParallelRouteLink = /** @class */ (function (_super) {
        __extends(ParallelRouteLink, _super);
        function ParallelRouteLink() {
            return _super !== null && _super.apply(this, arguments) || this;
        }
        /**
         * Constructs the link's route by modifying {@link #points}.
         * @return {boolean} true if it computed a route of points
         */
        ParallelRouteLink.prototype.computePoints = function () {
            var result = _super.prototype.computePoints.call(this);
            if (!this.isOrthogonal && this.curve !== go.Link.Bezier && this.hasCurviness()) {
                var curv = this.computeCurviness();
                if (curv !== 0) {
                    var num = this.pointsCount;
                    var pidx = 0;
                    var qidx = num - 1;
                    if (num >= 4) {
                        pidx++;
                        qidx--;
                    }
                    var frompt = this.getPoint(pidx);
                    var topt = this.getPoint(qidx);
                    var dx = topt.x - frompt.x;
                    var dy = topt.y - frompt.y;
                    var mx = frompt.x + dx * 1 / 8;
                    var my = frompt.y + dy * 1 / 8;
                    var px = mx;
                    var py = my;
                    if (-0.01 < dy && dy < 0.01) {
                        if (dx > 0)
                            py -= curv;
                        else
                            py += curv;
                    }
                    else {
                        var slope = -dx / dy;
                        var e = Math.sqrt(curv * curv / (slope * slope + 1));
                        if (curv < 0)
                            e = -e;
                        px = (dy < 0 ? -1 : 1) * e + mx;
                        py = slope * (px - mx) + my;
                    }
                    mx = frompt.x + dx * 7 / 8;
                    my = frompt.y + dy * 7 / 8;
                    var qx = mx;
                    var qy = my;
                    if (-0.01 < dy && dy < 0.01) {
                        if (dx > 0)
                            qy -= curv;
                        else
                            qy += curv;
                    }
                    else {
                        var slope = -dx / dy;
                        var e = Math.sqrt(curv * curv / (slope * slope + 1));
                        if (curv < 0)
                            e = -e;
                        qx = (dy < 0 ? -1 : 1) * e + mx;
                        qy = slope * (qx - mx) + my;
                    }
                    this.insertPointAt(pidx + 1, px, py);
                    this.insertPointAt(qidx + 1, qx, qy);
                }
            }
            return result;
        };
        return ParallelRouteLink;
    }(go.Link));
    exports.ParallelRouteLink = ParallelRouteLink;
});