wp-includes/js/tinymce/plugins/lists/plugin.js

   1 /**
   2  * plugin.js
   3  *
   4  * Copyright, Moxiecode Systems AB
   5  * Released under LGPL License.
   6  *
   7  * License: http://www.tinymce.com/license
   8  * Contributing: http://www.tinymce.com/contributing
   9  */
  10
  11 /*global tinymce:true */
  12 /*eslint consistent-this:0 */
  13
  14 tinymce.PluginManager.add('lists', function(editor) {
  15         var self = this;
  16
  17         function isListNode(node) {
  18                 return node && (/^(OL|UL|DL)$/).test(node.nodeName);
  19         }
  20
  21         function isFirstChild(node) {
  22                 return node.parentNode.firstChild == node;
  23         }
  24
  25         function isLastChild(node) {
  26                 return node.parentNode.lastChild == node;
  27         }
  28
  29         function isTextBlock(node) {
  30                 return node && !!editor.schema.getTextBlockElements()[node.nodeName];
  31         }
  32
  33         editor.on('init', function() {
  34                 var dom = editor.dom, selection = editor.selection;
  35
  36                 /**
  37                  * Returns a range bookmark. This will convert indexed bookmarks into temporary span elements with
  38                  * index 0 so that they can be restored properly after the DOM has been modified. Text bookmarks will not have spans
  39                  * added to them since they can be restored after a dom operation.
  40                  *
  41                  * So this: <p><b>|</b><b>|</b></p>
  42                  * becomes: <p><b><span data-mce-type="bookmark">|</span></b><b data-mce-type="bookmark">|</span></b></p>
  43                  *
  44                  * @param  {DOMRange} rng DOM Range to get bookmark on.
  45                  * @return {Object} Bookmark object.
  46                  */
  47                 function createBookmark(rng) {
  48                         var bookmark = {};
  49
  50                         function setupEndPoint(start) {
  51                                 var offsetNode, container, offset;
  52
  53                                 container = rng[start ? 'startContainer' : 'endContainer'];
  54                                 offset = rng[start ? 'startOffset' : 'endOffset'];
  55
  56                                 if (container.nodeType == 1) {
  57                                         offsetNode = dom.create('span', {'data-mce-type': 'bookmark'});
  58
  59                                         if (container.hasChildNodes()) {
  60                                                 offset = Math.min(offset, container.childNodes.length - 1);
  61
  62                                                 if (start) {
  63                                                         container.insertBefore(offsetNode, container.childNodes[offset]);
  64                                                 } else {
  65                                                         dom.insertAfter(offsetNode, container.childNodes[offset]);
  66                                                 }
  67                                         } else {
  68                                                 container.appendChild(offsetNode);
  69                                         }
  70
  71                                         container = offsetNode;
  72                                         offset = 0;
  73                                 }
  74
  75                                 bookmark[start ? 'startContainer' : 'endContainer'] = container;
  76                                 bookmark[start ? 'startOffset' : 'endOffset'] = offset;
  77                         }
  78
  79                         setupEndPoint(true);
  80
  81                         if (!rng.collapsed) {
  82                                 setupEndPoint();
  83                         }
  84
  85                         return bookmark;
  86                 }
  87
  88                 /**
  89                  * Moves the selection to the current bookmark and removes any selection container wrappers.
  90                  *
  91                  * @param {Object} bookmark Bookmark object to move selection to.
  92                  */
  93                 function moveToBookmark(bookmark) {
  94                         function restoreEndPoint(start) {
  95                                 var container, offset, node;
  96
  97                                 function nodeIndex(container) {
  98                                         var node = container.parentNode.firstChild, idx = 0;
  99
 100                                         while (node) {
 101                                                 if (node == container) {
 102                                                         return idx;
 103                                                 }
 104
 105                                                 // Skip data-mce-type=bookmark nodes
 106                                                 if (node.nodeType != 1 || node.getAttribute('data-mce-type') != 'bookmark') {
 107                                                         idx++;
 108                                                 }
 109
 110                                                 node = node.nextSibling;
 111                                         }
 112
 113                                         return -1;
 114                                 }
 115
 116                                 container = node = bookmark[start ? 'startContainer' : 'endContainer'];
 117                                 offset = bookmark[start ? 'startOffset' : 'endOffset'];
 118
 119                                 if (!container) {
 120                                         return;
 121                                 }
 122
 123                                 if (container.nodeType == 1) {
 124                                         offset = nodeIndex(container);
 125                                         container = container.parentNode;
 126                                         dom.remove(node);
 127                                 }
 128
 129                                 bookmark[start ? 'startContainer' : 'endContainer'] = container;
 130                                 bookmark[start ? 'startOffset' : 'endOffset'] = offset;
 131                         }
 132
 133                         restoreEndPoint(true);
 134                         restoreEndPoint();
 135
 136                         var rng = dom.createRng();
 137
 138                         rng.setStart(bookmark.startContainer, bookmark.startOffset);
 139
 140                         if (bookmark.endContainer) {
 141                                 rng.setEnd(bookmark.endContainer, bookmark.endOffset);
 142                         }
 143
 144                         selection.setRng(rng);
 145                 }
 146
 147                 function createNewTextBlock(contentNode, blockName) {
 148                         var node, textBlock, fragment = dom.createFragment(), hasContentNode;
 149                         var blockElements = editor.schema.getBlockElements();
 150
 151                         if (editor.settings.forced_root_block) {
 152                                 blockName = blockName || editor.settings.forced_root_block;
 153                         }
 154
 155                         if (blockName) {
 156                                 textBlock = dom.create(blockName);
 157
 158                                 if (textBlock.tagName === editor.settings.forced_root_block) {
 159                                         dom.setAttribs(textBlock, editor.settings.forced_root_block_attrs);
 160                                 }
 161
 162                                 fragment.appendChild(textBlock);
 163                         }
 164
 165                         if (contentNode) {
 166                                 while ((node = contentNode.firstChild)) {
 167                                         var nodeName = node.nodeName;
 168
 169                                         if (!hasContentNode && (nodeName != 'SPAN' || node.getAttribute('data-mce-type') != 'bookmark')) {
 170                                                 hasContentNode = true;
 171                                         }
 172
 173                                         if (blockElements[nodeName]) {
 174                                                 fragment.appendChild(node);
 175                                                 textBlock = null;
 176                                         } else {
 177                                                 if (blockName) {
 178                                                         if (!textBlock) {
 179                                                                 textBlock = dom.create(blockName);
 180                                                                 fragment.appendChild(textBlock);
 181                                                         }
 182
 183                                                         textBlock.appendChild(node);
 184                                                 } else {
 185                                                         fragment.appendChild(node);
 186                                                 }
 187                                         }
 188                                 }
 189                         }
 190
 191                         if (!editor.settings.forced_root_block) {
 192                                 fragment.appendChild(dom.create('br'));
 193                         } else {
 194                                 // BR is needed in empty blocks on non IE browsers
 195                                 if (!hasContentNode && (!tinymce.Env.ie || tinymce.Env.ie > 10)) {
 196                                         textBlock.appendChild(dom.create('br', {'data-mce-bogus': '1'}));
 197                                 }
 198                         }
 199
 200                         return fragment;
 201                 }
 202
 203                 function getSelectedListItems() {
 204                         return tinymce.grep(selection.getSelectedBlocks(), function(block) {
 205                                 return /^(LI|DT|DD)$/.test(block.nodeName);
 206                         });
 207                 }
 208
 209                 function splitList(ul, li, newBlock) {
 210                         var tmpRng, fragment;
 211
 212                         var bookmarks = dom.select('span[data-mce-type="bookmark"]', ul);
 213
 214                         newBlock = newBlock || createNewTextBlock(li);
 215                         tmpRng = dom.createRng();
 216                         tmpRng.setStartAfter(li);
 217                         tmpRng.setEndAfter(ul);
 218                         fragment = tmpRng.extractContents();
 219
 220                         if (!dom.isEmpty(fragment)) {
 221                                 dom.insertAfter(fragment, ul);
 222                         }
 223
 224                         dom.insertAfter(newBlock, ul);
 225
 226                         if (dom.isEmpty(li.parentNode)) {
 227                                 tinymce.each(bookmarks, function(node) {
 228                                         li.parentNode.parentNode.insertBefore(node, li.parentNode);
 229                                 });
 230
 231                                 dom.remove(li.parentNode);
 232                         }
 233
 234                         dom.remove(li);
 235                 }
 236
 237                 function mergeWithAdjacentLists(listBlock) {
 238                         var sibling, node;
 239
 240                         sibling = listBlock.nextSibling;
 241                         if (sibling && isListNode(sibling) && sibling.nodeName == listBlock.nodeName) {
 242                                 while ((node = sibling.firstChild)) {
 243                                         listBlock.appendChild(node);
 244                                 }
 245
 246                                 dom.remove(sibling);
 247                         }
 248
 249                         sibling = listBlock.previousSibling;
 250                         if (sibling && isListNode(sibling) && sibling.nodeName == listBlock.nodeName) {
 251                                 while ((node = sibling.firstChild)) {
 252                                         listBlock.insertBefore(node, listBlock.firstChild);
 253                                 }
 254
 255                                 dom.remove(sibling);
 256                         }
 257                 }
 258
 259                 /**
 260                  * Normalizes the all lists in the specified element.
 261                  */
 262                 function normalizeList(element) {
 263                         tinymce.each(tinymce.grep(dom.select('ol,ul', element)), function(ul) {
 264                                 var sibling, parentNode = ul.parentNode;
 265
 266                                 // Move UL/OL to previous LI if it's the only child of a LI
 267                                 if (parentNode.nodeName == 'LI' && parentNode.firstChild == ul) {
 268                                         sibling = parentNode.previousSibling;
 269                                         if (sibling && sibling.nodeName == 'LI') {
 270                                                 sibling.appendChild(ul);
 271
 272                                                 if (dom.isEmpty(parentNode)) {
 273                                                         dom.remove(parentNode);
 274                                                 }
 275                                         }
 276                                 }
 277
 278                                 // Append OL/UL to previous LI if it's in a parent OL/UL i.e. old HTML4
 279                                 if (isListNode(parentNode)) {
 280                                         sibling = parentNode.previousSibling;
 281                                         if (sibling && sibling.nodeName == 'LI') {
 282                                                 sibling.appendChild(ul);
 283                                         }
 284                                 }
 285                         });
 286                 }
 287
 288                 function outdent(li) {
 289                         var ul = li.parentNode, ulParent = ul.parentNode, newBlock;
 290
 291                         function removeEmptyLi(li) {
 292                                 if (dom.isEmpty(li)) {
 293                                         dom.remove(li);
 294                                 }
 295                         }
 296
 297                         if (li.nodeName == 'DD') {
 298                                 dom.rename(li, 'DT');
 299                                 return true;
 300                         }
 301
 302                         if (isFirstChild(li) && isLastChild(li)) {
 303                                 if (ulParent.nodeName == "LI") {
 304                                         dom.insertAfter(li, ulParent);
 305                                         removeEmptyLi(ulParent);
 306                                         dom.remove(ul);
 307                                 } else if (isListNode(ulParent)) {
 308                                         dom.remove(ul, true);
 309                                 } else {
 310                                         ulParent.insertBefore(createNewTextBlock(li), ul);
 311                                         dom.remove(ul);
 312                                 }
 313
 314                                 return true;
 315                         } else if (isFirstChild(li)) {
 316                                 if (ulParent.nodeName == "LI") {
 317                                         dom.insertAfter(li, ulParent);
 318                                         li.appendChild(ul);
 319                                         removeEmptyLi(ulParent);
 320                                 } else if (isListNode(ulParent)) {
 321                                         ulParent.insertBefore(li, ul);
 322                                 } else {
 323                                         ulParent.insertBefore(createNewTextBlock(li), ul);
 324                                         dom.remove(li);
 325                                 }
 326
 327                                 return true;
 328                         } else if (isLastChild(li)) {
 329                                 if (ulParent.nodeName == "LI") {
 330                                         dom.insertAfter(li, ulParent);
 331                                 } else if (isListNode(ulParent)) {
 332                                         dom.insertAfter(li, ul);
 333                                 } else {
 334                                         dom.insertAfter(createNewTextBlock(li), ul);
 335                                         dom.remove(li);
 336                                 }
 337
 338                                 return true;
 339                         } else {
 340                                 if (ulParent.nodeName == 'LI') {
 341                                         ul = ulParent;
 342                                         newBlock = createNewTextBlock(li, 'LI');
 343                                 } else if (isListNode(ulParent)) {
 344                                         newBlock = createNewTextBlock(li, 'LI');
 345                                 } else {
 346                                         newBlock = createNewTextBlock(li);
 347                                 }
 348
 349                                 splitList(ul, li, newBlock);
 350                                 normalizeList(ul.parentNode);
 351
 352                                 return true;
 353                         }
 354
 355                         return false;
 356                 }
 357
 358                 function indent(li) {
 359                         var sibling, newList;
 360
 361                         function mergeLists(from, to) {
 362                                 var node;
 363
 364                                 if (isListNode(from)) {
 365                                         while ((node = li.lastChild.firstChild)) {
 366                                                 to.appendChild(node);
 367                                         }
 368
 369                                         dom.remove(from);
 370                                 }
 371                         }
 372
 373                         if (li.nodeName == 'DT') {
 374                                 dom.rename(li, 'DD');
 375                                 return true;
 376                         }
 377
 378                         sibling = li.previousSibling;
 379
 380                         if (sibling && isListNode(sibling)) {
 381                                 sibling.appendChild(li);
 382                                 return true;
 383                         }
 384
 385                         if (sibling && sibling.nodeName == 'LI' && isListNode(sibling.lastChild)) {
 386                                 sibling.lastChild.appendChild(li);
 387                                 mergeLists(li.lastChild, sibling.lastChild);
 388                                 return true;
 389                         }
 390
 391                         sibling = li.nextSibling;
 392
 393                         if (sibling && isListNode(sibling)) {
 394                                 sibling.insertBefore(li, sibling.firstChild);
 395                                 return true;
 396                         }
 397
 398                         if (sibling && sibling.nodeName == 'LI' && isListNode(li.lastChild)) {
 399                                 return false;
 400                         }
 401
 402                         sibling = li.previousSibling;
 403                         if (sibling && sibling.nodeName == 'LI') {
 404                                 newList = dom.create(li.parentNode.nodeName);
 405                                 sibling.appendChild(newList);
 406                                 newList.appendChild(li);
 407                                 mergeLists(li.lastChild, newList);
 408                                 return true;
 409                         }
 410
 411                         return false;
 412                 }
 413
 414                 function indentSelection() {
 415                         var listElements = getSelectedListItems();
 416
 417                         if (listElements.length) {
 418                                 var bookmark = createBookmark(selection.getRng(true));
 419
 420                                 for (var i = 0; i < listElements.length; i++) {
 421                                         if (!indent(listElements[i]) && i === 0) {
 422                                                 break;
 423                                         }
 424                                 }
 425
 426                                 moveToBookmark(bookmark);
 427                                 editor.nodeChanged();
 428
 429                                 return true;
 430                         }
 431                 }
 432
 433                 function outdentSelection() {
 434                         var listElements = getSelectedListItems();
 435
 436                         if (listElements.length) {
 437                                 var bookmark = createBookmark(selection.getRng(true));
 438                                 var i, y, root = editor.getBody();
 439
 440                                 i = listElements.length;
 441                                 while (i--) {
 442                                         var node = listElements[i].parentNode;
 443
 444                                         while (node && node != root) {
 445                                                 y = listElements.length;
 446                                                 while (y--) {
 447                                                         if (listElements[y] === node) {
 448                                                                 listElements.splice(i, 1);
 449                                                                 break;
 450                                                         }
 451                                                 }
 452
 453                                                 node = node.parentNode;
 454                                         }
 455                                 }
 456
 457                                 for (i = 0; i < listElements.length; i++) {
 458                                         if (!outdent(listElements[i]) && i === 0) {
 459                                                 break;
 460                                         }
 461                                 }
 462
 463                                 moveToBookmark(bookmark);
 464                                 editor.nodeChanged();
 465
 466                                 return true;
 467                         }
 468                 }
 469
 470                 function applyList(listName) {
 471                         var rng = selection.getRng(true), bookmark = createBookmark(rng), listItemName = 'LI';
 472
 473                         listName = listName.toUpperCase();
 474
 475                         if (listName == 'DL') {
 476                                 listItemName = 'DT';
 477                         }
 478
 479                         function getSelectedTextBlocks() {
 480                                 var textBlocks = [], root = editor.getBody();
 481
 482                                 function getEndPointNode(start) {
 483                                         var container, offset;
 484
 485                                         container = rng[start ? 'startContainer' : 'endContainer'];
 486                                         offset = rng[start ? 'startOffset' : 'endOffset'];
 487
 488                                         // Resolve node index
 489                                         if (container.nodeType == 1) {
 490                                                 container = container.childNodes[Math.min(offset, container.childNodes.length - 1)] || container;
 491                                         }
 492
 493                                         while (container.parentNode != root) {
 494                                                 if (isTextBlock(container)) {
 495                                                         return container;
 496                                                 }
 497
 498                                                 if (/^(TD|TH)$/.test(container.parentNode.nodeName)) {
 499                                                         return container;
 500                                                 }
 501
 502                                                 container = container.parentNode;
 503                                         }
 504
 505                                         return container;
 506                                 }
 507
 508                                 var startNode = getEndPointNode(true);
 509                                 var endNode = getEndPointNode();
 510                                 var block, siblings = [];
 511
 512                                 for (var node = startNode; node; node = node.nextSibling) {
 513                                         siblings.push(node);
 514
 515                                         if (node == endNode) {
 516                                                 break;
 517                                         }
 518                                 }
 519
 520                                 tinymce.each(siblings, function(node) {
 521                                         if (isTextBlock(node)) {
 522                                                 textBlocks.push(node);
 523                                                 block = null;
 524                                                 return;
 525                                         }
 526
 527                                         if (dom.isBlock(node) || node.nodeName == 'BR') {
 528                                                 if (node.nodeName == 'BR') {
 529                                                         dom.remove(node);
 530                                                 }
 531
 532                                                 block = null;
 533                                                 return;
 534                                         }
 535
 536                                         var nextSibling = node.nextSibling;
 537                                         if (tinymce.dom.BookmarkManager.isBookmarkNode(node)) {
 538                                                 if (isTextBlock(nextSibling) || (!nextSibling && node.parentNode == root)) {
 539                                                         block = null;
 540                                                         return;
 541                                                 }
 542                                         }
 543
 544                                         if (!block) {
 545                                                 block = dom.create('p');
 546                                                 node.parentNode.insertBefore(block, node);
 547                                                 textBlocks.push(block);
 548                                         }
 549
 550                                         block.appendChild(node);
 551                                 });
 552
 553                                 return textBlocks;
 554                         }
 555
 556                         tinymce.each(getSelectedTextBlocks(), function(block) {
 557                                 var listBlock, sibling;
 558
 559                                 sibling = block.previousSibling;
 560                                 if (sibling && isListNode(sibling) && sibling.nodeName == listName) {
 561                                         listBlock = sibling;
 562                                         block = dom.rename(block, listItemName);
 563                                         sibling.appendChild(block);
 564                                 } else {
 565                                         listBlock = dom.create(listName);
 566                                         block.parentNode.insertBefore(listBlock, block);
 567                                         listBlock.appendChild(block);
 568                                         block = dom.rename(block, listItemName);
 569                                 }
 570
 571                                 mergeWithAdjacentLists(listBlock);
 572                         });
 573
 574                         moveToBookmark(bookmark);
 575                 }
 576
 577                 function removeList() {
 578                         var bookmark = createBookmark(selection.getRng(true)), root = editor.getBody();
 579
 580                         tinymce.each(getSelectedListItems(), function(li) {
 581                                 var node, rootList;
 582
 583                                 if (dom.isEmpty(li)) {
 584                                         outdent(li);
 585                                         return;
 586                                 }
 587
 588                                 for (node = li; node && node != root; node = node.parentNode) {
 589                                         if (isListNode(node)) {
 590                                                 rootList = node;
 591                                         }
 592                                 }
 593
 594                                 splitList(rootList, li);
 595                         });
 596
 597                         moveToBookmark(bookmark);
 598                 }
 599
 600                 function toggleList(listName) {
 601                         var parentList = dom.getParent(selection.getStart(), 'OL,UL,DL');
 602
 603                         if (parentList) {
 604                                 if (parentList.nodeName == listName) {
 605                                         removeList(listName);
 606                                 } else {
 607                                         var bookmark = createBookmark(selection.getRng(true));
 608                                         mergeWithAdjacentLists(dom.rename(parentList, listName));
 609                                         moveToBookmark(bookmark);
 610                                 }
 611                         } else {
 612                                 applyList(listName);
 613                         }
 614                 }
 615
 616                 function queryListCommandState(listName) {
 617                         return function() {
 618                                 var parentList = dom.getParent(editor.selection.getStart(), 'UL,OL,DL');
 619
 620                                 return parentList && parentList.nodeName == listName;
 621                         };
 622                 }
 623
 624                 self.backspaceDelete = function(isForward) {
 625                         function findNextCaretContainer(rng, isForward) {
 626                                 var node = rng.startContainer, offset = rng.startOffset;
 627                                 var nonEmptyBlocks, walker;
 628
 629                                 if (node.nodeType == 3 && (isForward ? offset < node.data.length : offset > 0)) {
 630                                         return node;
 631                                 }
 632
 633                                 nonEmptyBlocks = editor.schema.getNonEmptyElements();
 634                                 walker = new tinymce.dom.TreeWalker(rng.startContainer);
 635
 636                                 while ((node = walker[isForward ? 'next' : 'prev']())) {
 637                                         if (node.nodeName == 'LI' && !node.hasChildNodes()) {
 638                                                 return node;
 639                                         }
 640
 641                                         if (nonEmptyBlocks[node.nodeName]) {
 642                                                 return node;
 643                                         }
 644
 645                                         if (node.nodeType == 3 && node.data.length > 0) {
 646                                                 return node;
 647                                         }
 648                                 }
 649                         }
 650
 651                         function mergeLiElements(fromElm, toElm) {
 652                                 var node, listNode, ul = fromElm.parentNode;
 653
 654                                 if (isListNode(toElm.lastChild)) {
 655                                         listNode = toElm.lastChild;
 656                                 }
 657
 658                                 node = toElm.lastChild;
 659                                 if (node && node.nodeName == 'BR' && fromElm.hasChildNodes()) {
 660                                         dom.remove(node);
 661                                 }
 662
 663                                 if (dom.isEmpty(toElm)) {
 664                                         dom.$(toElm).empty();
 665                                 }
 666
 667                                 if (!dom.isEmpty(fromElm)) {
 668                                         while ((node = fromElm.firstChild)) {
 669                                                 toElm.appendChild(node);
 670                                         }
 671                                 }
 672
 673                                 if (listNode) {
 674                                         toElm.appendChild(listNode);
 675                                 }
 676
 677                                 dom.remove(fromElm);
 678
 679                                 if (dom.isEmpty(ul)) {
 680                                         dom.remove(ul);
 681                                 }
 682                         }
 683
 684                         if (selection.isCollapsed()) {
 685                                 var li = dom.getParent(selection.getStart(), 'LI');
 686
 687                                 if (li) {
 688                                         var rng = selection.getRng(true);
 689                                         var otherLi = dom.getParent(findNextCaretContainer(rng, isForward), 'LI');
 690
 691                                         if (otherLi && otherLi != li) {
 692                                                 var bookmark = createBookmark(rng);
 693
 694                                                 if (isForward) {
 695                                                         mergeLiElements(otherLi, li);
 696                                                 } else {
 697                                                         mergeLiElements(li, otherLi);
 698                                                 }
 699
 700                                                 moveToBookmark(bookmark);
 701
 702                                                 return true;
 703                                         } else if (!otherLi) {
 704                                                 if (!isForward && removeList(li.parentNode.nodeName)) {
 705                                                         return true;
 706                                                 }
 707                                         }
 708                                 }
 709                         }
 710                 };
 711
 712                 editor.addCommand('Indent', function() {
 713                         if (!indentSelection()) {
 714                                 return true;
 715                         }
 716                 });
 717
 718                 editor.addCommand('Outdent', function() {
 719                         if (!outdentSelection()) {
 720                                 return true;
 721                         }
 722                 });
 723
 724                 editor.addCommand('InsertUnorderedList', function() {
 725                         toggleList('UL');
 726                 });
 727
 728                 editor.addCommand('InsertOrderedList', function() {
 729                         toggleList('OL');
 730                 });
 731
 732                 editor.addCommand('InsertDefinitionList', function() {
 733                         toggleList('DL');
 734                 });
 735
 736                 editor.addQueryStateHandler('InsertUnorderedList', queryListCommandState('UL'));
 737                 editor.addQueryStateHandler('InsertOrderedList', queryListCommandState('OL'));
 738                 editor.addQueryStateHandler('InsertDefinitionList', queryListCommandState('DL'));
 739
 740                 editor.on('keydown', function(e) {
 741                         if (e.keyCode == 9 && editor.dom.getParent(editor.selection.getStart(), 'LI,DT,DD')) {
 742                                 e.preventDefault();
 743
 744                                 if (e.shiftKey) {
 745                                         outdentSelection();
 746                                 } else {
 747                                         indentSelection();
 748                                 }
 749                         }
 750                 });
 751         });
 752
 753         editor.addButton('indent', {
 754                 icon: 'indent',
 755                 title: 'Increase indent',
 756                 cmd: 'Indent',
 757                 onPostRender: function() {
 758                         var ctrl = this;
 759
 760                         editor.on('nodechange', function() {
 761                                 var blocks = editor.selection.getSelectedBlocks();
 762                                 var disable = false;
 763
 764                                 for (var i = 0, l = blocks.length; !disable && i < l; i++) {
 765                                         var tag = blocks[i].nodeName;
 766
 767                                         disable = (tag == 'LI' && isFirstChild(blocks[i]) || tag == 'UL' || tag == 'OL' || tag == 'DD');
 768                                 }
 769
 770                                 ctrl.disabled(disable);
 771                         });
 772                 }
 773         });
 774
 775         editor.on('keydown', function(e) {
 776                 if (e.keyCode == tinymce.util.VK.BACKSPACE) {
 777                         if (self.backspaceDelete()) {
 778                                 e.preventDefault();
 779                         }
 780                 } else if (e.keyCode == tinymce.util.VK.DELETE) {
 781                         if (self.backspaceDelete(true)) {
 782                                 e.preventDefault();
 783                         }
 784                 }
 785         });
 786 });