Chapter 1: Introduction

Co-authored-by: Cliff Click <cliffc@acm.org>
Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: hadha <helsgithub15@gmail.com>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Tamás Hadházy <85063808+Hels15@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>

1 files changed, 227 insertions, 0 deletions

diff --git a/graph/web/vendor/elk-api.js b/graph/web/vendor/elk-api.js
new file mode 100644
index 00000000..10c39e35
--- /dev/null
+++ b/graph/web/vendor/elk-api.js
@@ -0,0 +1,227 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.ELK = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports["default"] = void 0;
+function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
+function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
+function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
+function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
+function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
+function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
+/*******************************************************************************
+ * Copyright (c) 2017 Kiel University and others.
+ * 
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * https://www.eclipse.org/legal/epl-2.0.
+ * 
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GPL-3.0 which is available at
+ * https://www.gnu.org/licenses/gpl-3.0-standalone.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-3.0-or-later
+ *******************************************************************************/
+var ELK = exports["default"] = /*#__PURE__*/function () {
+  function ELK() {
+    var _this = this;
+    var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
+      _ref$defaultLayoutOpt = _ref.defaultLayoutOptions,
+      defaultLayoutOptions = _ref$defaultLayoutOpt === void 0 ? {} : _ref$defaultLayoutOpt,
+      _ref$algorithms = _ref.algorithms,
+      algorithms = _ref$algorithms === void 0 ? ['layered', 'stress', 'mrtree', 'radial', 'force', 'disco', 'sporeOverlap', 'sporeCompaction', 'rectpacking'] : _ref$algorithms,
+      workerFactory = _ref.workerFactory,
+      workerUrl = _ref.workerUrl;
+    _classCallCheck(this, ELK);
+    this.defaultLayoutOptions = defaultLayoutOptions;
+    this.initialized = false;
+
+    // check valid worker construction possible
+    if (typeof workerUrl === 'undefined' && typeof workerFactory === 'undefined') {
+      throw new Error("Cannot construct an ELK without both 'workerUrl' and 'workerFactory'.");
+    }
+    var factory = workerFactory;
+    if (typeof workerUrl !== 'undefined' && typeof workerFactory === 'undefined') {
+      // use default Web Worker
+      factory = function factory(url) {
+        return new Worker(url);
+      };
+    }
+
+    // create the worker
+    var worker = factory(workerUrl);
+    if (typeof worker.postMessage !== 'function') {
+      throw new TypeError("Created worker does not provide" + " the required 'postMessage' function.");
+    }
+
+    // wrap the worker to return promises
+    this.worker = new PromisedWorker(worker);
+
+    // initially register algorithms
+    this.worker.postMessage({
+      cmd: 'register',
+      algorithms: algorithms
+    }).then(function (r) {
+      return _this.initialized = true;
+    })["catch"](console.err);
+  }
+  return _createClass(ELK, [{
+    key: "layout",
+    value: function layout(graph) {
+      var _ref2 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
+        _ref2$layoutOptions = _ref2.layoutOptions,
+        layoutOptions = _ref2$layoutOptions === void 0 ? this.defaultLayoutOptions : _ref2$layoutOptions,
+        _ref2$logging = _ref2.logging,
+        logging = _ref2$logging === void 0 ? false : _ref2$logging,
+        _ref2$measureExecutio = _ref2.measureExecutionTime,
+        measureExecutionTime = _ref2$measureExecutio === void 0 ? false : _ref2$measureExecutio;
+      if (!graph) {
+        return Promise.reject(new Error("Missing mandatory parameter 'graph'."));
+      }
+      return this.worker.postMessage({
+        cmd: 'layout',
+        graph: graph,
+        layoutOptions: layoutOptions,
+        options: {
+          logging: logging,
+          measureExecutionTime: measureExecutionTime
+        }
+      });
+    }
+  }, {
+    key: "knownLayoutAlgorithms",
+    value: function knownLayoutAlgorithms() {
+      return this.worker.postMessage({
+        cmd: 'algorithms'
+      });
+    }
+  }, {
+    key: "knownLayoutOptions",
+    value: function knownLayoutOptions() {
+      return this.worker.postMessage({
+        cmd: 'options'
+      });
+    }
+  }, {
+    key: "knownLayoutCategories",
+    value: function knownLayoutCategories() {
+      return this.worker.postMessage({
+        cmd: 'categories'
+      });
+    }
+  }, {
+    key: "terminateWorker",
+    value: function terminateWorker() {
+      if (this.worker) this.worker.terminate();
+    }
+  }]);
+}();
+var PromisedWorker = /*#__PURE__*/function () {
+  function PromisedWorker(worker) {
+    var _this2 = this;
+    _classCallCheck(this, PromisedWorker);
+    if (worker === undefined) {
+      throw new Error("Missing mandatory parameter 'worker'.");
+    }
+    this.resolvers = {};
+    this.worker = worker;
+    this.worker.onmessage = function (answer) {
+      // why is this necessary?
+      setTimeout(function () {
+        _this2.receive(_this2, answer);
+      }, 0);
+    };
+  }
+  return _createClass(PromisedWorker, [{
+    key: "postMessage",
+    value: function postMessage(msg) {
+      var id = this.id || 0;
+      this.id = id + 1;
+      msg.id = id;
+      var self = this;
+      return new Promise(function (resolve, reject) {
+        // prepare the resolver
+        self.resolvers[id] = function (err, res) {
+          if (err) {
+            self.convertGwtStyleError(err);
+            reject(err);
+          } else {
+            resolve(res);
+          }
+        };
+        // post the message
+        self.worker.postMessage(msg);
+      });
+    }
+  }, {
+    key: "receive",
+    value: function receive(self, answer) {
+      var json = answer.data;
+      var resolver = self.resolvers[json.id];
+      if (resolver) {
+        delete self.resolvers[json.id];
+        if (json.error) {
+          resolver(json.error);
+        } else {
+          resolver(null, json.data);
+        }
+      }
+    }
+  }, {
+    key: "terminate",
+    value: function terminate() {
+      if (this.worker) {
+        this.worker.terminate();
+      }
+    }
+  }, {
+    key: "convertGwtStyleError",
+    value: function convertGwtStyleError(err) {
+      if (!err) {
+        return;
+      }
+      // Somewhat flatten the way GWT stores nested exception(s)
+      var javaException = err['__java$exception'];
+      if (javaException) {
+        // Note that the property name of the nested exception is different
+        // in the non-minified ('cause') and the minified (not deterministic) version.
+        // Hence, the version below only works for the non-minified version.
+        // However, as the minified stack trace is not of much use anyway, one
+        // should switch the used version for debugging in such a case.
+        if (javaException.cause && javaException.cause.backingJsObject) {
+          err.cause = javaException.cause.backingJsObject;
+          this.convertGwtStyleError(err.cause);
+        }
+        delete err['__java$exception'];
+      }
+    }
+  }]);
+}();
+},{}],2:[function(require,module,exports){
+"use strict";
+
+/*******************************************************************************
+ * Copyright (c) 2021 Kiel University and others.
+ * 
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * https://www.eclipse.org/legal/epl-2.0.
+ * 
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GPL-3.0 which is available at
+ * https://www.gnu.org/licenses/gpl-3.0-standalone.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-3.0-or-later
+ *******************************************************************************/
+var ELK = require('./elk-api.js')["default"];
+Object.defineProperty(module.exports, "__esModule", {
+  value: true
+});
+module.exports = ELK;
+ELK["default"] = ELK;
+},{"./elk-api.js":1}]},{},[2])(2)
+});