1 /* 2 Copyright 2008-2023 3 Matthias Ehmann, 4 Michael Gerhaeuser, 5 Carsten Miller, 6 Bianca Valentin, 7 Alfred Wassermann, 8 Peter Wilfahrt 9 10 This file is part of JSXGraph. 11 12 JSXGraph is free software dual licensed under the GNU LGPL or MIT License. 13 14 You can redistribute it and/or modify it under the terms of the 15 16 * GNU Lesser General Public License as published by 17 the Free Software Foundation, either version 3 of the License, or 18 (at your option) any later version 19 OR 20 * MIT License: https://github.com/jsxgraph/jsxgraph/blob/master/LICENSE.MIT 21 22 JSXGraph is distributed in the hope that it will be useful, 23 but WITHOUT ANY WARRANTY; without even the implied warranty of 24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 GNU Lesser General Public License for more details. 26 27 You should have received a copy of the GNU Lesser General Public License and 28 the MIT License along with JSXGraph. If not, see <https://www.gnu.org/licenses/> 29 and <https://opensource.org/licenses/MIT/>. 30 */ 31 32 /*global JXG: true, document:true, jQuery:true, define: true, window: true*/ 33 /*jslint nomen: true, plusplus: true*/ 34 35 /** 36 * @fileoverview The JSXGraph object is defined in this file. JXG.JSXGraph controls all boards. 37 * It has methods to create, save, load and free boards. Additionally some helper functions are 38 * defined in this file directly in the JXG namespace. 39 * @version 0.99 40 */ 41 42 import JXG from "./jxg"; 43 import Env from "./utils/env"; 44 import Type from "./utils/type"; 45 import Mat from "./math/math"; 46 import Board from "./base/board"; 47 import FileReader from "./reader/file"; 48 import Options from "./options"; 49 import SVGRenderer from "./renderer/svg"; 50 import VMLRenderer from "./renderer/vml"; 51 import CanvasRenderer from "./renderer/canvas"; 52 import NoRenderer from "./renderer/no"; 53 54 /** 55 * Constructs a new JSXGraph singleton object. 56 * @class The JXG.JSXGraph singleton stores all properties required 57 * to load, save, create and free a board. 58 */ 59 JXG.JSXGraph = { 60 /** 61 * Stores the renderer that is used to draw the boards. 62 * @type String 63 */ 64 rendererType: (function () { 65 Options.board.renderer = "no"; 66 67 if (Env.supportsVML()) { 68 Options.board.renderer = "vml"; 69 // Ok, this is some real magic going on here. IE/VML always was so 70 // terribly slow, except in one place: Examples placed in a moodle course 71 // was almost as fast as in other browsers. So i grabbed all the css and 72 // lib scripts from our moodle, added them to a jsxgraph example and it 73 // worked. next step was to strip all the css/lib code which didn't affect 74 // the VML update speed. The following five lines are what was left after 75 // the last step and yes - it basically does nothing but reads two 76 // properties of document.body on every mouse move. why? we don't know. if 77 // you know, please let us know. 78 // 79 // If we want to use the strict mode we have to refactor this a little bit. Let's 80 // hope the magic isn't gone now. Anywho... it's only useful in old versions of IE 81 // which should not be used anymore. 82 document.onmousemove = function () { 83 var t; 84 85 if (document.body) { 86 t = document.body.scrollLeft; 87 t += document.body.scrollTop; 88 } 89 90 return t; 91 }; 92 } 93 94 if (Env.supportsCanvas()) { 95 Options.board.renderer = "canvas"; 96 } 97 98 if (Env.supportsSVG()) { 99 Options.board.renderer = "svg"; 100 } 101 102 // we are inside node 103 if (Env.isNode() && Env.supportsCanvas()) { 104 Options.board.renderer = "canvas"; 105 } 106 107 if (Env.isNode() || Options.renderer === "no") { 108 Options.text.display = "internal"; 109 Options.infobox.display = "internal"; 110 } 111 112 return Options.board.renderer; 113 })(), 114 115 /** 116 * Initialize the rendering engine 117 * 118 * @param {String} box HTML id of the div-element which hosts the JSXGraph construction 119 * @param {Object} dim The dimensions of the board 120 * @param {Object} doc Usually, this is document object of the browser window. If false or null, this defaults 121 * to the document object of the browser. 122 * @param {Object} attrRenderer Attribute 'renderer', specifies the rendering engine. Possible values are 'auto', 'svg', 123 * 'canvas', 'no', and 'vml'. 124 * @returns {Object} Reference to the rendering engine object. 125 * @private 126 */ 127 initRenderer: function (box, dim, doc, attrRenderer) { 128 var boxid, renderer; 129 130 // Former version: 131 // doc = doc || document 132 if ((!Type.exists(doc) || doc === false) && typeof document === "object") { 133 doc = document; 134 } 135 136 if (typeof doc === "object" && box !== null) { 137 boxid = doc.getElementById(box); 138 139 // Remove everything from the container before initializing the renderer and the board 140 while (boxid.firstChild) { 141 boxid.removeChild(boxid.firstChild); 142 } 143 } else { 144 boxid = box; 145 } 146 147 // If attrRenderer is not supplied take the first available renderer 148 if (attrRenderer === undefined || attrRenderer === "auto") { 149 attrRenderer = this.rendererType; 150 } 151 // create the renderer 152 if (attrRenderer === "svg") { 153 renderer = new SVGRenderer(boxid, dim); 154 } else if (attrRenderer === "vml") { 155 renderer = new VMLRenderer(boxid); 156 } else if (attrRenderer === "canvas") { 157 renderer = new CanvasRenderer(boxid, dim); 158 } else { 159 renderer = new NoRenderer(); 160 } 161 162 return renderer; 163 }, 164 165 /** 166 * Merge the user supplied attributes with the attributes in options.js 167 * 168 * @param {Object} attributes User supplied attributes 169 * @returns {Object} Merged attributes for the board 170 * 171 * @private 172 */ 173 _setAttributes: function (attributes) { 174 // merge attributes 175 var attr = Type.copyAttributes(attributes, Options, 'board'), 176 177 // These attributes - which are objects - have to be copied separately. 178 list = [ 179 'drag', 'fullscreen', 180 'intl', 181 'keyboard', 'logging', 182 'navbar', 'pan', 'resize', 183 'screenshot', 'selection', 184 'zoom' 185 ], 186 len = list.length, i, key; 187 188 for (i = 0; i < len; i++) { 189 key = list[i]; 190 attr[key] = Type.copyAttributes(attr, Options, 'board', key); 191 } 192 193 // Treat moveTarget separately, because deepCopy will not work here. 194 // Reason: moveTarget will be an HTML node and it is prevented that Type.deepCopy will copy it. 195 attr.movetarget = 196 attributes.moveTarget || attributes.movetarget || Options.board.moveTarget; 197 198 return attr; 199 }, 200 201 /** 202 * Further initialization of the board. Set some properties from attribute values. 203 * 204 * @param {JXG.Board} board 205 * @param {Object} attr attributes object 206 * @param {Object} dimensions Object containing dimensions of the canvas 207 * 208 * @private 209 */ 210 _fillBoard: function (board, attr, dimensions) { 211 board.initInfobox(attr.infobox); 212 board.maxboundingbox = attr.maxboundingbox; 213 board.resizeContainer(dimensions.width, dimensions.height, true, true); 214 board._createSelectionPolygon(attr); 215 board.renderer.drawNavigationBar(board, attr.navbar); 216 JXG.boards[board.id] = board; 217 }, 218 219 /** 220 * 221 * @param {String} container HTML-ID to the HTML-element in which the board is painted. 222 * @param {Object} attr An object that sets some of the board properties. 223 * 224 * @private 225 */ 226 _setARIA: function (container, attr) { 227 var doc = attr.document, 228 doc_glob, 229 node_jsx, 230 newNode, 231 parent, 232 id_label, 233 id_description; 234 235 if (typeof doc !== 'object') { 236 if (!Env.isBrowser) { 237 return; 238 } 239 doc = document; 240 } 241 242 node_jsx = doc.getElementById(container); 243 doc_glob = node_jsx.ownerDocument; // This is the window.document element, needed below. 244 parent = node_jsx.parentNode; 245 246 id_label = container + "_ARIAlabel"; 247 id_description = container + "_ARIAdescription"; 248 249 newNode = doc_glob.createElement("div"); 250 newNode.innerHTML = attr.title; 251 newNode.setAttribute("id", id_label); 252 newNode.style.display = "none"; 253 parent.insertBefore(newNode, node_jsx); 254 255 newNode = doc_glob.createElement("div"); 256 newNode.innerHTML = attr.description; 257 newNode.setAttribute("id", id_description); 258 newNode.style.display = "none"; 259 parent.insertBefore(newNode, node_jsx); 260 261 node_jsx.setAttribute("aria-labelledby", id_label); 262 node_jsx.setAttribute("aria-describedby", id_description); 263 }, 264 265 /** 266 * Remove the two corresponding ARIA divs when freeing a board 267 * 268 * @param {JXG.Board} board 269 * 270 * @private 271 */ 272 _removeARIANodes: function (board) { 273 var node, id, doc; 274 275 doc = board.document || document; 276 if (typeof doc !== "object") { 277 return; 278 } 279 280 id = board.containerObj.getAttribute("aria-labelledby"); 281 node = doc.getElementById(id); 282 if (node && node.parentNode) { 283 node.parentNode.removeChild(node); 284 } 285 id = board.containerObj.getAttribute("aria-describedby"); 286 node = doc.getElementById(id); 287 if (node && node.parentNode) { 288 node.parentNode.removeChild(node); 289 } 290 }, 291 292 /** 293 * Initialize a new board. 294 * @param {String} box HTML-ID to the HTML-element in which the board is painted. 295 * @param {Object} attributes An object that sets some of the board properties. Most of these properties can be set via JXG.Options. 296 * @param {Array} [attributes.boundingbox=[-5, 5, 5, -5]] An array containing four numbers describing the left, top, right and bottom boundary of the board in user coordinates 297 * @param {Boolean} [attributes.keepaspectratio=false] If <tt>true</tt>, the bounding box is adjusted to the same aspect ratio as the aspect ratio of the div containing the board. 298 * @param {Boolean} [attributes.showCopyright=false] Show the copyright string in the top left corner. 299 * @param {Boolean} [attributes.showNavigation=false] Show the navigation buttons in the bottom right corner. 300 * @param {Object} [attributes.zoom] Allow the user to zoom with the mouse wheel or the two-fingers-zoom gesture. 301 * @param {Object} [attributes.pan] Allow the user to pan with shift+drag mouse or two-fingers-pan gesture. 302 * @param {Object} [attributes.drag] Allow the user to drag objects with a pointer device. 303 * @param {Object} [attributes.keyboard] Allow the user to drag objects with arrow keys on keyboard. 304 * @param {Boolean} [attributes.axis=false] If set to true, show the axis. Can also be set to an object that is given to both axes as an attribute object. 305 * @param {Boolean|Object} [attributes.grid] If set to true, shows the grid. Can also be set to an object that is given to the grid as its attribute object. 306 * @param {Boolean} [attributes.registerEvents=true] Register mouse / touch events. 307 * @returns {JXG.Board} Reference to the created board. 308 * 309 * @see JXG.AbstractRenderer#drawNavigationBar 310 */ 311 initBoard: function (box, attributes) { 312 var originX, originY, unitX, unitY, w, h, 313 offX = 0, offY = 0, 314 renderer, dimensions, bbox, 315 attr, axattr, axattr_x, axattr_y, 316 board; 317 318 attributes = attributes || {}; 319 attr = this._setAttributes(attributes); 320 321 dimensions = Env.getDimensions(box, attr.document); 322 323 if (attr.unitx || attr.unity) { 324 originX = Type.def(attr.originx, 150); 325 originY = Type.def(attr.originy, 150); 326 unitX = Type.def(attr.unitx, 50); 327 unitY = Type.def(attr.unity, 50); 328 } else { 329 bbox = attr.boundingbox; 330 if (bbox[0] < attr.maxboundingbox[0]) { 331 bbox[0] = attr.maxboundingbox[0]; 332 } 333 if (bbox[1] > attr.maxboundingbox[1]) { 334 bbox[1] = attr.maxboundingbox[1]; 335 } 336 if (bbox[2] > attr.maxboundingbox[2]) { 337 bbox[2] = attr.maxboundingbox[2]; 338 } 339 if (bbox[3] < attr.maxboundingbox[3]) { 340 bbox[3] = attr.maxboundingbox[3]; 341 } 342 343 // Size of HTML div. 344 // If zero, the size is set to a small value to avoid 345 // division by zero. 346 w = Math.max(parseInt(dimensions.width, 10), Mat.eps); 347 h = Math.max(parseInt(dimensions.height, 10), Mat.eps); 348 349 if (Type.exists(bbox) && attr.keepaspectratio) { 350 /* 351 * If the boundingbox attribute is given and the ratio of height and width of the 352 * sides defined by the bounding box and the ratio of the dimensions of the div tag 353 * which contains the board do not coincide, then the smaller side is chosen. 354 */ 355 unitX = w / (bbox[2] - bbox[0]); 356 unitY = h / (bbox[1] - bbox[3]); 357 358 if (Math.abs(unitX) < Math.abs(unitY)) { 359 unitY = (Math.abs(unitX) * unitY) / Math.abs(unitY); 360 // Add the additional units in equal portions above and below 361 offY = (h / unitY - (bbox[1] - bbox[3])) * 0.5; 362 } else { 363 unitX = (Math.abs(unitY) * unitX) / Math.abs(unitX); 364 // Add the additional units in equal portions left and right 365 offX = (w / unitX - (bbox[2] - bbox[0])) * 0.5; 366 } 367 } else { 368 unitX = w / (bbox[2] - bbox[0]); 369 unitY = h / (bbox[1] - bbox[3]); 370 } 371 originX = -unitX * (bbox[0] - offX); 372 originY = unitY * (bbox[1] + offY); 373 } 374 375 renderer = this.initRenderer(box, dimensions, attr.document, attr.renderer); 376 this._setARIA(box, attr); 377 378 // create the board 379 board = new Board( 380 box, 381 renderer, 382 attr.id, 383 [originX, originY], 384 /*attr.zoomfactor * */ attr.zoomx, 385 /*attr.zoomfactor * */ attr.zoomy, 386 unitX, 387 unitY, 388 dimensions.width, 389 dimensions.height, 390 attr 391 ); 392 393 board.keepaspectratio = attr.keepaspectratio; 394 395 this._fillBoard(board, attr, dimensions); 396 397 // create elements like axes, grid, navigation, ... 398 board.suspendUpdate(); 399 if (attr.axis) { 400 axattr = typeof attr.axis === "object" ? attr.axis : {}; 401 402 // The defaultAxes attributes are overwritten by user supplied axis object. 403 axattr_x = Type.deepCopy(Options.board.defaultAxes.x, axattr); 404 axattr_y = Type.deepCopy(Options.board.defaultAxes.y, axattr); 405 // The user supplied defaultAxes attributes are merged in. 406 if (attr.defaultaxes.x) { 407 axattr_x = Type.deepCopy(axattr_x, attr.defaultaxes.x); 408 } 409 if (attr.defaultaxes.y) { 410 axattr_y = Type.deepCopy(axattr_y, attr.defaultaxes.y); 411 } 412 413 board.defaultAxes = {}; 414 board.defaultAxes.x = board.create( 415 "axis", 416 [ 417 [0, 0], 418 [1, 0] 419 ], 420 axattr_x 421 ); 422 board.defaultAxes.y = board.create( 423 "axis", 424 [ 425 [0, 0], 426 [0, 1] 427 ], 428 axattr_y 429 ); 430 } 431 if (attr.grid) { 432 board.create("grid", [], typeof attr.grid === "object" ? attr.grid : {}); 433 } 434 board.unsuspendUpdate(); 435 436 return board; 437 }, 438 439 /** 440 * Load a board from a file containing a construction made with either GEONExT, 441 * Intergeo, Geogebra, or Cinderella. 442 * @param {String} box HTML-ID to the HTML-element in which the board is painted. 443 * @param {String} file base64 encoded string. 444 * @param {String} format containing the file format: 'Geonext' or 'Intergeo'. 445 * @param {Object} attributes Attributes for the board and 'encoding'. 446 * Compressed files need encoding 'iso-8859-1'. Otherwise it probably is 'utf-8'. 447 * @param {Function} callback 448 * @returns {JXG.Board} Reference to the created board. 449 * @see JXG.FileReader 450 * @see JXG.GeonextReader 451 * @see JXG.GeogebraReader 452 * @see JXG.IntergeoReader 453 * @see JXG.CinderellaReader 454 * 455 * @example 456 * // Uncompressed file 457 * var board = JXG.JSXGraph.loadBoardFromFile('jxgbox', 'filename', 'geonext', 458 * {encoding: 'utf-8'}, 459 * function (board) { console.log("Done loading"); } 460 * ); 461 * // Compressed file 462 * var board = JXG.JSXGraph.loadBoardFromFile('jxgbox', 'filename', 'geonext', 463 * {encoding: 'iso-8859-1'}, 464 * function (board) { console.log("Done loading"); } 465 * ); 466 * 467 * @example 468 * // From <input type="file" id="localfile" /> 469 * var file = document.getElementById('localfile').files[0]; 470 * JXG.JSXGraph.loadBoardFromFile('jxgbox', file, 'geonext', 471 * {encoding: 'utf-8'}, 472 * function (board) { console.log("Done loading"); } 473 * ); 474 */ 475 loadBoardFromFile: function (box, file, format, attributes, callback) { 476 var attr, renderer, board, dimensions, encoding; 477 478 attributes = attributes || {}; 479 attr = this._setAttributes(attributes); 480 481 dimensions = Env.getDimensions(box, attr.document); 482 renderer = this.initRenderer(box, dimensions, attr.document, attr.renderer); 483 this._setARIA(box, attr); 484 485 /* User default parameters, in parse* the values in the gxt files are submitted to board */ 486 board = new Board( 487 box, 488 renderer, 489 "", 490 [150, 150], 491 1, 492 1, 493 50, 494 50, 495 dimensions.width, 496 dimensions.height, 497 attr 498 ); 499 this._fillBoard(board, attr, dimensions); 500 encoding = attr.encoding || "iso-8859-1"; 501 FileReader.parseFileContent(file, board, format, true, encoding, callback); 502 503 return board; 504 }, 505 506 /** 507 * Load a board from a base64 encoded string containing a construction made with either GEONExT, 508 * Intergeo, Geogebra, or Cinderella. 509 * @param {String} box HTML-ID to the HTML-element in which the board is painted. 510 * @param {String} string base64 encoded string. 511 * @param {String} format containing the file format: 'Geonext', 'Intergeo', 'Geogebra'. 512 * @param {Object} attributes Attributes for the board and 'encoding'. 513 * Compressed files need encoding 'iso-8859-1'. Otherwise it probably is 'utf-8'. 514 * @param {Function} callback 515 * @returns {JXG.Board} Reference to the created board. 516 * @see JXG.FileReader 517 * @see JXG.GeonextReader 518 * @see JXG.GeogebraReader 519 * @see JXG.IntergeoReader 520 * @see JXG.CinderellaReader 521 */ 522 loadBoardFromString: function (box, string, format, attributes, callback) { 523 var attr, renderer, board, dimensions; 524 525 attributes = attributes || {}; 526 attr = this._setAttributes(attributes); 527 528 dimensions = Env.getDimensions(box, attr.document); 529 renderer = this.initRenderer(box, dimensions, attr.document, attr.renderer); 530 this._setARIA(box, attr); 531 532 /* User default parameters, in parse* the values in the gxt files are submitted to board */ 533 board = new Board( 534 box, 535 renderer, 536 "", 537 [150, 150], 538 1.0, 539 1.0, 540 50, 541 50, 542 dimensions.width, 543 dimensions.height, 544 attr 545 ); 546 this._fillBoard(board, attr, dimensions); 547 FileReader.parseString(string, board, format, true, callback); 548 549 return board; 550 }, 551 552 /** 553 * Delete a board and all its contents. 554 * @param {JXG.Board,String} board HTML-ID to the DOM-element in which the board is drawn. 555 */ 556 freeBoard: function (board) { 557 var el; 558 559 if (typeof board === "string") { 560 board = JXG.boards[board]; 561 } 562 563 this._removeARIANodes(board); 564 board.removeEventHandlers(); 565 board.suspendUpdate(); 566 567 // Remove all objects from the board. 568 for (el in board.objects) { 569 if (board.objects.hasOwnProperty(el)) { 570 board.objects[el].remove(); 571 } 572 } 573 574 // Remove all the other things, left on the board, XHTML save 575 while (board.containerObj.firstChild) { 576 board.containerObj.removeChild(board.containerObj.firstChild); 577 } 578 579 // Tell the browser the objects aren't needed anymore 580 for (el in board.objects) { 581 if (board.objects.hasOwnProperty(el)) { 582 delete board.objects[el]; 583 } 584 } 585 586 // Free the renderer and the algebra object 587 delete board.renderer; 588 589 // clear the creator cache 590 board.jc.creator.clearCache(); 591 delete board.jc; 592 593 // Finally remove the board itself from the boards array 594 delete JXG.boards[board.id]; 595 }, 596 597 /** 598 * @deprecated Use JXG#registerElement 599 * @param element 600 * @param creator 601 */ 602 registerElement: function (element, creator) { 603 JXG.deprecated("JXG.JSXGraph.registerElement()", "JXG.registerElement()"); 604 JXG.registerElement(element, creator); 605 } 606 }; 607 608 // JessieScript/JessieCode startup: 609 // Search for script tags of type text/jessiecode and execute them. 610 if (Env.isBrowser && typeof window === 'object' && typeof document === 'object') { 611 Env.addEvent(window, 'load', 612 function () { 613 var type, i, j, div, id, 614 board, txt, width, height, maxWidth, aspectRatio, 615 cssClasses, bbox, axis, grid, code, src, request, 616 postpone = false, 617 618 scripts = document.getElementsByTagName("script"), 619 init = function (code, type, bbox) { 620 var board = JXG.JSXGraph.initBoard(id, { 621 boundingbox: bbox, 622 keepaspectratio: true, 623 grid: grid, 624 axis: axis, 625 showReload: true 626 }); 627 628 if (type.toLowerCase().indexOf("script") > -1) { 629 board.construct(code); 630 } else { 631 try { 632 board.jc.parse(code); 633 } catch (e2) { 634 JXG.debug(e2); 635 } 636 } 637 638 return board; 639 }, 640 makeReload = function (board, code, type, bbox) { 641 return function () { 642 var newBoard; 643 644 JXG.JSXGraph.freeBoard(board); 645 newBoard = init(code, type, bbox); 646 newBoard.reload = makeReload(newBoard, code, type, bbox); 647 }; 648 }; 649 650 for (i = 0; i < scripts.length; i++) { 651 type = scripts[i].getAttribute("type", false); 652 653 if ( 654 Type.exists(type) && 655 (type.toLowerCase() === "text/jessiescript" || 656 type.toLowerCase() === "jessiescript" || 657 type.toLowerCase() === "text/jessiecode" || 658 type.toLowerCase() === "jessiecode") 659 ) { 660 cssClasses = scripts[i].getAttribute("class", false) || ""; 661 width = scripts[i].getAttribute("width", false) || ""; 662 height = scripts[i].getAttribute("height", false) || ""; 663 maxWidth = scripts[i].getAttribute("maxwidth", false) || "100%"; 664 aspectRatio = scripts[i].getAttribute("aspectratio", false) || "1/1"; 665 bbox = scripts[i].getAttribute("boundingbox", false) || "-5, 5, 5, -5"; 666 id = scripts[i].getAttribute("container", false); 667 src = scripts[i].getAttribute("src", false); 668 669 bbox = bbox.split(","); 670 if (bbox.length !== 4) { 671 bbox = [-5, 5, 5, -5]; 672 } else { 673 for (j = 0; j < bbox.length; j++) { 674 bbox[j] = parseFloat(bbox[j]); 675 } 676 } 677 axis = Type.str2Bool(scripts[i].getAttribute("axis", false) || "false"); 678 grid = Type.str2Bool(scripts[i].getAttribute("grid", false) || "false"); 679 680 if (!Type.exists(id)) { 681 id = "jessiescript_autgen_jxg_" + i; 682 div = document.createElement("div"); 683 div.setAttribute("id", id); 684 685 txt = width !== "" ? "width:" + width + ";" : ""; 686 txt += height !== "" ? "height:" + height + ";" : ""; 687 txt += maxWidth !== "" ? "max-width:" + maxWidth + ";" : ""; 688 txt += aspectRatio !== "" ? "aspect-ratio:" + aspectRatio + ";" : ""; 689 690 div.setAttribute("style", txt); 691 div.setAttribute("class", "jxgbox " + cssClasses); 692 try { 693 document.body.insertBefore(div, scripts[i]); 694 } catch (e) { 695 // there's probably jquery involved... 696 if (typeof jQuery === "object") { 697 jQuery(div).insertBefore(scripts[i]); 698 } 699 } 700 } else { 701 div = document.getElementById(id); 702 } 703 704 code = ""; 705 706 if (Type.exists(src)) { 707 postpone = true; 708 request = new XMLHttpRequest(); 709 request.open("GET", src); 710 request.overrideMimeType("text/plain; charset=x-user-defined"); 711 /* jshint ignore:start */ 712 request.addEventListener("load", function () { 713 if (this.status < 400) { 714 code = this.responseText + "\n" + code; 715 board = init(code, type, bbox); 716 board.reload = makeReload(board, code, type, bbox); 717 } else { 718 throw new Error( 719 "\nJSXGraph: failed to load file", 720 src, 721 ":", 722 this.responseText 723 ); 724 } 725 }); 726 request.addEventListener("error", function (e) { 727 throw new Error("\nJSXGraph: failed to load file", src, ":", e); 728 }); 729 /* jshint ignore:end */ 730 request.send(); 731 } else { 732 postpone = false; 733 } 734 735 if (document.getElementById(id)) { 736 code = scripts[i].innerHTML; 737 code = code.replace(/<!\[CDATA\[/g, "").replace(/\]\]>/g, ""); 738 scripts[i].innerHTML = code; 739 740 if (!postpone) { 741 // Do no wait for data from "src" attribute 742 board = init(code, type, bbox); 743 board.reload = makeReload(board, code, type, bbox); 744 } 745 } else { 746 JXG.debug( 747 "JSXGraph: Apparently the div injection failed. Can't create a board, sorry." 748 ); 749 } 750 } 751 } 752 }, 753 window 754 ); 755 } 756 757 export default JXG.JSXGraph; 758