1 /*global window: true, GCN: true, jQuery: true*/ 2 (function (GCN) { 3 4 'use strict'; 5 6 /** 7 * Searches for the an Aloha editable object of the given id. 8 * 9 * @TODO: Once Aloha.getEditableById() is patched to not cause an 10 * JavaScript exception if the element for the given ID is not found 11 * then we can deprecate this function and use Aloha's instead. 12 * 13 * @static 14 * @param {string} id Id of Aloha.Editable object to find. 15 * @return {Aloha.Editable=} The editable object, if wound; otherwise null. 16 */ 17 function getAlohaEditableById(id) { 18 var Aloha = (typeof window !== 'undefined') && window.Aloha; 19 if (!Aloha) { 20 return null; 21 } 22 23 // If the element is a textarea then route to the editable div. 24 var element = jQuery('#' + id); 25 if (element.length && 26 element[0].nodeName.toLowerCase() === 'textarea') { 27 id += '-aloha'; 28 } 29 30 var editables = Aloha.editables; 31 var j = editables.length; 32 while (j) { 33 if (editables[--j].getId() === id) { 34 return editables[j]; 35 } 36 } 37 38 return null; 39 } 40 41 /** 42 * Helper function to normalize the arguments that can be passed to the 43 * `edit()' and `render()' methods. 44 * 45 * @private 46 * @static 47 * @param {arguments} args A list of arguments. 48 * @return {object} Object containing an the properties `element', 49 * `success' and `error', and `data'. 50 */ 51 function getRenderOptions(args) { 52 var argv = Array.prototype.slice.call(args); 53 var argc = args.length; 54 var arg; 55 var i; 56 57 var element; 58 var success; 59 var error; 60 var prerenderedData = false; 61 62 for (i = 0; i < argc; ++i) { 63 arg = argv[i]; 64 65 switch (jQuery.type(arg)) { 66 case 'string': 67 element = jQuery(arg); 68 break; 69 case 'object': 70 if (element) { 71 prerenderedData = arg; 72 } else { 73 element = arg; 74 } 75 break; 76 case 'function': 77 if (success) { 78 error = arg; 79 } else { 80 success = arg; 81 } 82 break; 83 // Descarding all other types of arguments... 84 } 85 } 86 87 return { 88 element : element, 89 success : success, 90 error : error, 91 data : prerenderedData 92 }; 93 } 94 95 /** 96 * Exposes an API to operate on a Content.Node tag. 97 * 98 * @class 99 * @name TagAPI 100 */ 101 var TagAPI = GCN.defineChainback({ 102 103 __chainbacktype__: 'TagAPI', 104 105 /** 106 * Type of the object 107 * 108 * @type {string} 109 */ 110 _type: 'tag', 111 112 /** 113 * A reference to the object in which this tag is contained. This value 114 * is set during initialization. 115 * 116 * @type {GCN.ContentObject} 117 */ 118 _parent: null, 119 120 /** 121 * Name of this tag. 122 * 123 * @type {string} 124 */ 125 _name: null, 126 127 /** 128 * Gets this tag's information from the object that contains it. 129 * 130 * @param {function(TagAPI)} success Callback to be invoked when this 131 * operation completes normally. 132 * @param {function(GCNError):boolean} error Custom error handler. 133 */ 134 '!_read': function (success, error) { 135 var parent = this.parent(); 136 // Because tags always retrieve their data from a parent object, 137 // this tag is only completely fetched if it's parent is also fetch. 138 // The parent could have been cleared of all it's data using 139 // _clearCache() while this tag was left in a _fetched state, so we 140 // need to check. 141 if (this._fetched && parent._fetched) { 142 if (success) { 143 this._invoke(success, [this]); 144 } 145 return; 146 } 147 148 // Because when loading folders via folder(1).folders() will 149 // fetch them without any tag data. We therefore have to refetch 150 // them wit their tag data. 151 if (parent._fetched && !parent._data.tags) { 152 parent._data.tags = {}; 153 parent.fetch(function (response) { 154 if (GCN.getResponseCode(response) !== 'OK') { 155 GCN.handleResponseError(response); 156 return; 157 } 158 var newTags = {}; 159 jQuery.each( 160 response[parent._type].tags, 161 function (name, data) { 162 if (!GCN.TagContainerAPI.hasTagData(parent, name)) { 163 newTags[name] = data; 164 } 165 } 166 ); 167 GCN.TagContainerAPI.extendTags(parent, newTags); 168 parent._read(success, error); 169 }); 170 return; 171 } 172 173 var that = this; 174 175 // Take the data for this tag from it's container. 176 parent._read(function () { 177 that._data = parent._getTagData(that._name); 178 179 if (!that._data) { 180 var err = GCN.createError('TAG_NOT_FOUND', 181 'Could not find tag "' + that._name + '" in ' + 182 parent._type + " " + parent._data.id, that); 183 GCN.handleError(err, error); 184 return; 185 } 186 187 that._fetched = true; 188 189 if (success) { 190 that._invoke(success, [that]); 191 } 192 }, error); 193 }, 194 195 /** 196 * Retrieve the object in which this tag is contained. It does so by 197 * getting this chainback's "chainlink ancestor" object. 198 * 199 * @function 200 * @name parent 201 * @memberOf TagAPI 202 * @return {GCN.AbstractTagContainer} 203 */ 204 '!parent': function () { 205 return this._ancestor(); 206 }, 207 208 /** 209 * Initialize a tag object. Unlike other chainback objects, tags will 210 * always have a parent. If its parent have been loaded, we will 211 * immediately copy the this tag's data from the parent's `_data' object 212 * to the tag's `_data' object. 213 * 214 * @param {string|object} 215 * settings 216 * @param {function(TagAPI)} 217 * success Callback to be invoked when this operation 218 * completes normally. 219 * @param {function(GCNError):boolean} 220 * error Custom error handler. 221 */ 222 _init: function (settings, success, error) { 223 if (jQuery.type(settings) === 'object') { 224 this._name = settings.name; 225 this._data = settings; 226 this._data.id = settings.id; 227 this._fetched = true; 228 } else { 229 // We don't want to reinitalize the data object when it 230 // has not been fetched yet. 231 if (!this._fetched) { 232 this._data = {}; 233 this._data.id = this._name = settings; 234 } 235 } 236 237 if (success) { 238 var that = this; 239 240 this._read(function (container) { 241 that._read(success, error); 242 }, error); 243 244 // Even if not success callback is given, read this tag's data from 245 // is container, if that container has the data available. 246 // If we are initializing a placeholder tag object (in the process 247 // of creating brand new tag, for example), then its parent 248 // container will not have any data for this tag yet. We know that 249 // we are working with a placeholder tag if no `_data.id' or `_name' 250 // property is set. 251 } else if (!this._fetched && this._name && 252 this.parent()._fetched) { 253 this._data = this.parent()._getTagData(this._name); 254 this._fetched = !!this._data; 255 256 // We are propably initializing a placholder object, we will assign 257 // it its own `_data' and `_fetched' properties so that it is not 258 // accessing the prototype values. 259 } else if (!this._fetched) { 260 this._data = {}; 261 this._data.id = this._name = settings; 262 this._fetched = false; 263 } 264 }, 265 266 /** 267 * Gets or sets a property of this tags. Note that tags do not have a 268 * `_shadow' object, and we update the `_data' object directly. 269 * 270 * @function 271 * @name prop 272 * @memberOf TagAPI 273 * @param {string} 274 * name Name of tag part. 275 * @param {*=} 276 * set Optional value. If provided, the tag part will be 277 * replaced with this value. 278 * @return {*} The value of the accessed tag part. 279 * @throws UNFETCHED_OBJECT_ACCESS 280 */ 281 '!prop': function (name, value) { 282 var parent = this.parent(); 283 284 if (!this._fetched) { 285 GCN.error('UNFETCHED_OBJECT_ACCESS', 286 'Calling method `prop()\' on an unfetched object: ' + 287 parent._type + " " + parent._data.id, this); 288 289 return; 290 } 291 292 if (jQuery.type(value) !== 'undefined') { 293 this._data[name] = value; 294 parent._update('tags.' + GCN.escapePropertyName(this.prop('name')), 295 this._data); 296 } 297 298 return this._data[name]; 299 }, 300 301 /** 302 * <p> 303 * Gets or sets a part of a tag. 304 * 305 * <p> 306 * There exists different types of tag parts, and the possible value of 307 * each kind of tag part may differ. 308 * 309 * <p> 310 * Below is a list of possible kinds of tag parts, and references to 311 * what the possible range their values can take: 312 * 313 * <pre> 314 * STRING : {@link TagParts.STRING} 315 * RICHTEXT : {@link TagParts.RICHTEXT} 316 * BOOLEAN : {@link TagParts.BOOLEAN} 317 * IMAGE : {@link TagParts.IMAGE} 318 * FILE : {@link TagParts.FILE} 319 * FOLDER : {@link TagParts.FOLDER} 320 * PAGE : {@link TagParts.PAGE} 321 * OVERVIEW : {@link TagParts.OVERVIEW} 322 * PAGETAG : {@link TagParts.PAGETAG} 323 * TEMPLATETAG : {@link TagParts.TEMPLATETAG} 324 * SELECT : {@link TagParts.SELECT} 325 * MULTISELECT : {@link TagParts.MULTISELECT} 326 * </pre> 327 * 328 * @function 329 * @name part 330 * @memberOf TagAPI 331 * 332 * @param {string} 333 * name Name of tag opart. 334 * @param {*=} 335 * set Optional value. If provided, the tag part will be 336 * update with this value. How this happends differs between 337 * different type of tag parts. 338 * @return {*} The value of the accessed tag part. 339 * @throws UNFETCHED_OBJECT_ACCESS 340 * @throws PART_NOT_FOUND 341 */ 342 '!part': function (name, value) { 343 var parent; 344 345 if (!this._fetched) { 346 parent = this.parent(); 347 348 GCN.error('UNFETCHED_OBJECT_ACCESS', 349 'Calling method `prop()\' on an unfetched object: ' + 350 parent._type + " " + parent._data.id, this); 351 352 return null; 353 } 354 355 var part = this._data.properties[name]; 356 357 if (!part) { 358 parent = this.parent(); 359 360 GCN.error('PART_NOT_FOUND', 'Tag "' + this._name + 361 '" of ' + parent._type + ' ' + parent._data.id + 362 ' does not have a part "' + name + '"', this); 363 364 return null; 365 } 366 367 if (jQuery.type(value) === 'undefined') { 368 return GCN.TagParts.get(part); 369 } 370 371 var partValue = GCN.TagParts.set(part, value); 372 373 // Each time we perform a write operation on a tag, we will update 374 // the tag in the tag container's `_shadow' object as well. 375 this.parent()._update('tags.' + GCN.escapePropertyName(this._name), 376 this._data); 377 378 return partValue; 379 }, 380 381 /** 382 * Remove this tag from its containing object (it's parent). 383 * 384 * @function 385 * @memberOf TagAPI 386 * @name remove 387 * @param {function} callback A function that receive this tag's parent 388 * object as its only arguments. 389 */ 390 remove: function (success, error) { 391 var parent = this.parent(); 392 393 if (!parent.hasOwnProperty('_deletedTags')) { 394 parent._deletedTags = []; 395 } 396 397 GCN.pub('tag.before-deleted', {tag: this}); 398 399 parent._deletedTags.push(this._name); 400 401 if (parent._data.tags && 402 parent._data.tags[this._name]) { 403 delete parent._data.tags[this._name]; 404 } 405 406 if (parent._shadow.tags && 407 parent._shadow.tags[this._name]) { 408 delete parent._shadow.tags[this._name]; 409 } 410 411 parent._removeAssociatedTagData(this._name); 412 413 if (success) { 414 parent._persist(null, success, error); 415 } 416 }, 417 418 /** 419 * Given a DOM element, will generate a template which represents this 420 * tag as it would be if rendered in the element. 421 * 422 * @param {jQuery.<HTMLElement>} $element DOM element with which to 423 * generate the template. 424 * @return {string} Template string. 425 */ 426 '!_makeTemplate': function ($element) { 427 if (0 === $element.length) { 428 return '<node ' + this._name + '>'; 429 } 430 var placeholder = 431 '-{(' + this.parent().id() + ':' + this._name + ')}-'; 432 var template = jQuery.trim( 433 $element.clone().html(placeholder)[0].outerHTML 434 ); 435 return template.replace(placeholder, '<node ' + this._name + '>'); 436 }, 437 438 /** 439 * Will render this tag in the given render `mode'. If an element is 440 * provided, the content will be placed in that element. If the `mode' 441 * is "edit", any rendered editables will be initialized for Aloha 442 * Editor. Any editable that are rendered into an element will also be 443 * added to the tag's parent object's `_editables' array so that they 444 * can have their changed contents copied back into their corresponding 445 * tags during saving. 446 * 447 * @param {string} mode The rendering mode. Valid values are "view", 448 * and "edit". 449 * @param {jQuery.<HTMLElement>} element DOM element into which the 450 * the rendered content should be 451 * placed. 452 * @param {function(string, TagAPI, object)} Optional success handler. 453 * @param {function(GCNError):boolean} Optional custom error handler. 454 */ 455 '!_render': function (mode, $element, success, error) { 456 var tag = this._fork(); 457 tag._read(function () { 458 var template = ($element && $element.length) 459 ? tag._makeTemplate($element) 460 : '<node ' + tag._name + '>'; 461 462 var obj = tag.parent(); 463 464 obj._renderTemplate(template, mode, function (data) { 465 466 // Because the parent content object needs to track any 467 // blocks or editables that have been rendered in this tag. 468 obj._processRenderedTags(data); 469 470 GCN._handleContentRendered(data.content, tag, 471 function (html) { 472 if ($element && $element.length) { 473 GCN.renderOnto($element, html); 474 // Because 'content-inserted' is deprecated by 475 // 'tag.inserted'. 476 GCN.pub('content-inserted', [$element, html]); 477 GCN.pub('tag.inserted', [$element, html]); 478 } 479 480 var frontendEditing = function (callback) { 481 if ('edit' === mode) { 482 // Because 'rendered-for-editing' is deprecated by 483 // 'tag.rendered-for-editing'. 484 GCN.pub('rendered-for-editing', { 485 tag: tag, 486 data: data, 487 callback: callback 488 }); 489 GCN.pub('tag.rendered-for-editing', { 490 tag: tag, 491 data: data, 492 callback: callback 493 }); 494 } else if (callback) { 495 callback(); 496 } 497 }; 498 499 // Because the caller of edit() my wish to do things 500 // in addition to, or instead of, our frontend 501 // initialization. 502 if (success) { 503 tag._invoke( 504 success, 505 [html, tag, data, frontendEditing] 506 ); 507 } else { 508 frontendEditing(); 509 } 510 511 tag._merge(); 512 }); 513 }, function () { 514 tag._merge(); 515 }); 516 }, error); 517 }, 518 519 /** 520 * <p> 521 * Render the tag based on its settings on the server. Can be called 522 * with the following arguments:<(p> 523 * 524 * <pre> 525 * // Render tag contents into div whose id is "content-div" 526 * render('#content-div') or render(jQuery('#content-div')) 527 * </pre> 528 * 529 * <pre> 530 * // Pass the html rendering of the tag in the given callback 531 * render(function(html, tag) { 532 * // implementation! 533 * }) 534 * </pre> 535 * 536 * Whenever a 2nd argument is provided, it will be taken as as custom 537 * error handler. Invoking render() without any arguments will yield no 538 * results. 539 * 540 * @function 541 * @name render 542 * @memberOf TagAPI 543 * @param {string|jQuery.HTMLElement} 544 * selector jQuery selector or jQuery target element to be 545 * used as render destination 546 * @param {function(string, 547 * GCN.TagAPI)} success success function that will receive 548 * the rendered html as well as the TagAPI object 549 */ 550 render: function () { 551 var tag = this; 552 var args = arguments; 553 jQuery(function () { 554 args = getRenderOptions(args); 555 if (args.element || args.success) { 556 tag._render( 557 'view', 558 args.element, 559 args.success, 560 args.error 561 ); 562 } 563 }); 564 }, 565 566 /** 567 * <p> 568 * Renders this tag for editing. 569 * </p> 570 * 571 * <p> 572 * Differs from the render() method in that it calls this tag to be 573 * rendered in "edit" mode via the REST API so that it is rendered with 574 * any additional content that is appropriate for when this tag is used 575 * in edit mode. 576 * </p> 577 * 578 * <p> 579 * The GCN JS API library will also start keeping track of various 580 * aspects of this tag and its rendered content. 581 * </p> 582 * 583 * <p> 584 * When a jQuery selector is passed to this method, the contents of the 585 * rendered tag will overwrite the element identified by that selector. 586 * All rendered blocks and editables will be automatically placed into 587 * the DOM and initialize for editing. 588 * </p> 589 * 590 * <p> 591 * The behavior is different when this method is called with a function 592 * as its first argument. In this case the rendered contents of the tag 593 * will not be autmatically placed into the DOM, but will be passed onto 594 * the callback function as argmuments. It is then up to the caller to 595 * place the content into the DOM and initialize all rendered blocks and 596 * editables appropriately. 597 * </p> 598 * 599 * @function 600 * @name edit 601 * @memberOf TagAPI 602 * @param {(string|jQuery.HTMLElement)=} element 603 * The element into which this tag is to be rendered. 604 * @param {function(string,TagAPI)=} success 605 * A function that will be called once the tag is rendered. 606 * @param {function(GCNError):boolean=} error 607 * A custom error handler. 608 */ 609 edit: function () { 610 var tag = this; 611 var args = getRenderOptions(arguments); 612 if (args.data) { 613 614 // Because the parent content object needs to track any 615 // blocks or editables that have been rendered in this tag. 616 tag.parent()._processRenderedTags(args.data); 617 618 // Because 'rendered-for-editing' is deprecated in favor of 619 // 'tag.rendered-for-editing' 620 GCN.pub('rendered-for-editing', { 621 tag: tag, 622 data: args.data, 623 callback: function () { 624 if (args.success) { 625 tag._invoke( 626 args.success, 627 [args.content, tag, args.data] 628 ); 629 } 630 } 631 }); 632 GCN.pub('tag.rendered-for-editing', { 633 tag: tag, 634 data: args.data, 635 callback: function () { 636 if (args.success) { 637 tag._invoke( 638 args.success, 639 [args.content, tag, args.data] 640 ); 641 } 642 } 643 }); 644 } else { 645 jQuery(function () { 646 if (args.element || args.success) { 647 tag._render( 648 'edit', 649 args.element, 650 args.success, 651 args.error 652 ); 653 } 654 }); 655 } 656 }, 657 658 /** 659 * Persists the changes to this tag on its container object. Will only 660 * save this one tag and not affect the container object itself. 661 * Important: be careful when dealing with editable contents - these 662 * will be reloaded from Aloha Editor editables when a page is saved 663 * and thus overwrite changes you made to an editable tag. 664 * 665 * @function 666 * @name save 667 * @memberOf TagAPI 668 * @param {function(TagAPI)} success Callback to be invoked when this 669 * operation completes normally. 670 * @param {function(GCNError):boolean} error Custom error handler. 671 */ 672 save: function (success, error) { 673 var tag = this; 674 var parent = tag.parent(); 675 var type = parent._type; 676 var json = {}; 677 678 // create a mockup object to be able to save only one tag 679 // id is needed - REST API won't accept objects without id 680 json[type] = { id: parent.id(), tags: {} }; 681 json[type].tags[tag._name] = tag._data; 682 683 parent._authAjax({ 684 url : GCN.settings.BACKEND_PATH + '/rest/' + type + '/save/' 685 + parent.id() + GCN._getChannelParameter(parent), 686 type : 'POST', 687 error : error, 688 json : json, 689 success : function onTagSaveSuccess(response) { 690 if (GCN.getResponseCode(response) === 'OK') { 691 tag._invoke(success, [tag]); 692 } else { 693 tag._die(GCN.getResponseCode(response)); 694 GCN.handleResponseError(response, error); 695 } 696 } 697 }); 698 } 699 }); 700 701 // Unlike content objects, tags do not have unique ids and so we uniquely I 702 // dentify tags by their name, and their parent's id. 703 TagAPI._needsChainedHash = true; 704 705 GCN.tag = GCN.exposeAPI(TagAPI); 706 GCN.TagAPI = TagAPI; 707 708 }(GCN)); 709