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

   1 /**
   2  * plugin.js
   3  *
   4  * Released under LGPL License.
   5  * Copyright (c) 1999-2015 Ephox Corp. All rights reserved
   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 isChildOfBody(elm) {
  18                 return editor.$.contains(editor.getBody(), elm);
  19         }
  20
  21         function isBr(node) {
  22                 return node && node.nodeName == 'BR';
  23         }
  24
  25         function isListNode(node) {
  26                 return node && (/^(OL|UL|DL)$/).test(node.nodeName) && isChildOfBody(node);
  27         }
  28
  29         function isFirstChild(node) {
  30                 return node.parentNode.firstChild == node;
  31         }
  32
  33         function isLastChild(node) {
  34                 return node.parentNode.lastChild == node;
  35         }
  36
  37         function isTextBlock(node) {
  38                 return node && !!editor.schema.getTextBlockElements()[node.nodeName];
  39         }
  40
  41         function isEditorBody(elm) {
  42                 return elm === editor.getBody();
  43         }
  44
  45         editor.on('init', function() {
  46                 var dom = editor.dom, selection = editor.selection;
  47
  48                 function isEmpty(elm, keepBookmarks) {
  49                         var empty = dom.isEmpty(elm);
  50
  51                         if (keepBookmarks && dom.select('span[data-mce-type=bookmark]').length > 0) {
  52                                 return false;
  53                         }
  54
  55                         return empty;
  56                 }
  57
  58                 /**
  59                  * Returns a range bookmark. This will convert indexed bookmarks into temporary span elements with
  60                  * index 0 so that they can be restored properly after the DOM has been modified. Text bookmarks will not have spans
  61                  * added to them since they can be restored after a dom operation.
  62                  *
  63                  * So this: <p><b>|</b><b>|</b></p>
  64                  * becomes: <p><b><span data-mce-type="bookmark">|</span></b><b data-mce-type="bookmark">|</span></b></p>
  65                  *
  66                  * @param  {DOMRange} rng DOM Range to get bookmark on.
  67                  * @return {Object} Bookmark object.
  68                  */
  69                 function createBookmark(rng) {
  70                         var bookmark = {};
  71
  72                         function setupEndPoint(start) {
  73                                 var offsetNode, container, offset;
  74
  75                                 container = rng[start ? 'startContainer' : 'endContainer'];
  76                                 offset = rng[start ? 'startOffset' : 'endOffset'];
  77
  78                                 if (container.nodeType == 1) {
  79                                         offsetNode = dom.create('span', {'data-mce-type': 'bookmark'});
  80
  81                                         if (container.hasChildNodes()) {
  82                                                 offset = Math.min(offset, container.childNodes.length - 1);
  83
  84                                                 if (start) {
  85                                                         container.insertBefore(offsetNode, container.childNodes[offset]);
  86                                                 } else {
  87                                                         dom.insertAfter(offsetNode, container.childNodes[offset]);
  88                                                 }
  89                                         } else {
  90                                                 container.appendChild(offsetNode);
  91                                         }
  92
  93                                         container = offsetNode;
  94                                         offset = 0;
  95                                 }
  96
  97                                 bookmark[start ? 'startContainer' : 'endContainer'] = container;
  98                                 bookmark[start ? 'startOffset' : 'endOffset'] = offset;
  99                         }
 100
 101                         setupEndPoint(true);
 102
 103                         if (!rng.collapsed) {
 104                                 setupEndPoint();
 105                         }
 106
 107                         return bookmark;
 108                 }
 109
 110                 /**
 111                  * Moves the selection to the current bookmark and removes any selection container wrappers.
 112                  *
 113                  * @param {Object} bookmark Bookmark object to move selection to.
 114                  */
 115                 function moveToBookmark(bookmark) {
 116                         function restoreEndPoint(start) {
 117                                 var container, offset, node;
 118
 119                                 function nodeIndex(container) {
 120                                         var node = container.parentNode.firstChild, idx = 0;
 121
 122                                         while (node) {
 123                                                 if (node == container) {
 124                                                         return idx;
 125                                                 }
 126
 127                                                 // Skip data-mce-type=bookmark nodes
 128                                                 if (node.nodeType != 1 || node.getAttribute('data-mce-type') != 'bookmark') {
 129                                                         idx++;
 130                                                 }
 131
 132                                                 node = node.nextSibling;
 133                                         }
 134
 135                                         return -1;
 136                                 }
 137
 138                                 container = node = bookmark[start ? 'startContainer' : 'endContainer'];
 139                                 offset = bookmark[start ? 'startOffset' : 'endOffset'];
 140
 141                                 if (!container) {
 142                                         return;
 143                                 }
 144
 145                                 if (container.nodeType == 1) {
 146                                         offset = nodeIndex(container);
 147                                         container = container.parentNode;
 148                                         dom.remove(node);
 149                                 }
 150
 151                                 bookmark[start ? 'startContainer' : 'endContainer'] = container;
 152                                 bookmark[start ? 'startOffset' : 'endOffset'] = offset;
 153                         }
 154
 155                         restoreEndPoint(true);
 156                         restoreEndPoint();
 157
 158                         var rng = dom.createRng();
 159
 160                         rng.setStart(bookmark.startContainer, bookmark.startOffset);
 161
 162                         if (bookmark.endContainer) {
 163                                 rng.setEnd(bookmark.endContainer, bookmark.endOffset);
 164                         }
 165
 166                         selection.setRng(rng);
 167                 }
 168
 169                 function createNewTextBlock(contentNode, blockName) {
 170                         var node, textBlock, fragment = dom.createFragment(), hasContentNode;
 171                         var blockElements = editor.schema.getBlockElements();
 172
 173                         if (editor.settings.forced_root_block) {
 174                                 blockName = blockName || editor.settings.forced_root_block;
 175                         }
 176
 177                         if (blockName) {
 178                                 textBlock = dom.create(blockName);
 179
 180                                 if (textBlock.tagName === editor.settings.forced_root_block) {
 181                                         dom.setAttribs(textBlock, editor.settings.forced_root_block_attrs);
 182                                 }
 183
 184                                 fragment.appendChild(textBlock);
 185                         }
 186
 187                         if (contentNode) {
 188                                 while ((node = contentNode.firstChild)) {
 189                                         var nodeName = node.nodeName;
 190
 191                                         if (!hasContentNode && (nodeName != 'SPAN' || node.getAttribute('data-mce-type') != 'bookmark')) {
 192                                                 hasContentNode = true;
 193                                         }
 194
 195                                         if (blockElements[nodeName]) {
 196                                                 fragment.appendChild(node);
 197                                                 textBlock = null;
 198                                         } else {
 199                                                 if (blockName) {
 200                                                         if (!textBlock) {
 201                                                                 textBlock = dom.create(blockName);
 202                                                                 fragment.appendChild(textBlock);
 203                                                         }
 204
 205                                                         textBlock.appendChild(node);
 206                                                 } else {
 207                                                         fragment.appendChild(node);
 208                                                 }
 209                                         }
 210                                 }
 211                         }
 212
 213                         if (!editor.settings.forced_root_block) {
 214                                 fragment.appendChild(dom.create('br'));
 215                         } else {
 216                                 // BR is needed in empty blocks on non IE browsers
 217                                 if (!hasContentNode && (!tinymce.Env.ie || tinymce.Env.ie > 10)) {
 218                                         textBlock.appendChild(dom.create('br', {'data-mce-bogus': '1'}));
 219                                 }
 220                         }
 221
 222                         return fragment;
 223                 }
 224
 225                 function getSelectedListItems() {
 226                         return tinymce.grep(selection.getSelectedBlocks(), function(block) {
 227                                 return /^(LI|DT|DD)$/.test(block.nodeName);
 228                         });
 229                 }
 230
 231                 function splitList(ul, li, newBlock) {
 232                         var tmpRng, fragment, bookmarks, node;
 233
 234                         function removeAndKeepBookmarks(targetNode) {
 235                                 tinymce.each(bookmarks, function(node) {
 236                                         targetNode.parentNode.insertBefore(node, li.parentNode);
 237                                 });
 238
 239                                 dom.remove(targetNode);
 240                         }
 241
 242                         bookmarks = dom.select('span[data-mce-type="bookmark"]', ul);
 243                         newBlock = newBlock || createNewTextBlock(li);
 244                         tmpRng = dom.createRng();
 245                         tmpRng.setStartAfter(li);
 246                         tmpRng.setEndAfter(ul);
 247                         fragment = tmpRng.extractContents();
 248
 249                         for (node = fragment.firstChild; node; node = node.firstChild) {
 250                                 if (node.nodeName == 'LI' && dom.isEmpty(node)) {
 251                                         dom.remove(node);
 252                                         break;
 253                                 }
 254                         }
 255
 256                         if (!dom.isEmpty(fragment)) {
 257                                 dom.insertAfter(fragment, ul);
 258                         }
 259
 260                         dom.insertAfter(newBlock, ul);
 261
 262                         if (isEmpty(li.parentNode)) {
 263                                 removeAndKeepBookmarks(li.parentNode);
 264                         }
 265
 266                         dom.remove(li);
 267
 268                         if (isEmpty(ul)) {
 269                                 dom.remove(ul);
 270                         }
 271                 }
 272
 273                 function mergeWithAdjacentLists(listBlock) {
 274                         var sibling, node;
 275
 276                         sibling = listBlock.nextSibling;
 277                         if (sibling && isListNode(sibling) && sibling.nodeName == listBlock.nodeName) {
 278                                 while ((node = sibling.firstChild)) {
 279                                         listBlock.appendChild(node);
 280                                 }
 281
 282                                 dom.remove(sibling);
 283                         }
 284
 285                         sibling = listBlock.previousSibling;
 286                         if (sibling && isListNode(sibling) && sibling.nodeName == listBlock.nodeName) {
 287                                 while ((node = sibling.firstChild)) {
 288                                         listBlock.insertBefore(node, listBlock.firstChild);
 289                                 }
 290
 291                                 dom.remove(sibling);
 292                         }
 293                 }
 294
 295                 /**
 296                  * Normalizes the all lists in the specified element.
 297                  */
 298                 function normalizeList(element) {
 299                         tinymce.each(tinymce.grep(dom.select('ol,ul', element)), function(ul) {
 300                                 var sibling, parentNode = ul.parentNode;
 301
 302                                 // Move UL/OL to previous LI if it's the only child of a LI
 303                                 if (parentNode.nodeName == 'LI' && parentNode.firstChild == ul) {
 304                                         sibling = parentNode.previousSibling;
 305                                         if (sibling && sibling.nodeName == 'LI') {
 306                                                 sibling.appendChild(ul);
 307
 308                                                 if (isEmpty(parentNode)) {
 309                                                         dom.remove(parentNode);
 310                                                 }
 311                                         }
 312                                 }
 313
 314                                 // Append OL/UL to previous LI if it's in a parent OL/UL i.e. old HTML4
 315                                 if (isListNode(parentNode)) {
 316                                         sibling = parentNode.previousSibling;
 317                                         if (sibling && sibling.nodeName == 'LI') {
 318                                                 sibling.appendChild(ul);
 319                                         }
 320                                 }
 321                         });
 322                 }
 323
 324                 function outdent(li) {
 325                         var ul = li.parentNode, ulParent = ul.parentNode, newBlock;
 326
 327                         function removeEmptyLi(li) {
 328                                 if (isEmpty(li)) {
 329                                         dom.remove(li);
 330                                 }
 331                         }
 332
 333                         if (isEditorBody(ul)) {
 334                                 return true;
 335                         }
 336
 337                         if (li.nodeName == 'DD') {
 338                                 dom.rename(li, 'DT');
 339                                 return true;
 340                         }
 341
 342                         if (isFirstChild(li) && isLastChild(li)) {
 343                                 if (ulParent.nodeName == "LI") {
 344                                         dom.insertAfter(li, ulParent);
 345                                         removeEmptyLi(ulParent);
 346                                         dom.remove(ul);
 347                                 } else if (isListNode(ulParent)) {
 348                                         dom.remove(ul, true);
 349                                 } else {
 350                                         ulParent.insertBefore(createNewTextBlock(li), ul);
 351                                         dom.remove(ul);
 352                                 }
 353
 354                                 return true;
 355                         } else if (isFirstChild(li)) {
 356                                 if (ulParent.nodeName == "LI") {
 357                                         dom.insertAfter(li, ulParent);
 358                                         li.appendChild(ul);
 359                                         removeEmptyLi(ulParent);
 360                                 } else if (isListNode(ulParent)) {
 361                                         ulParent.insertBefore(li, ul);
 362                                 } else {
 363                                         ulParent.insertBefore(createNewTextBlock(li), ul);
 364                                         dom.remove(li);
 365                                 }
 366
 367                                 return true;
 368                         } else if (isLastChild(li)) {
 369                                 if (ulParent.nodeName == "LI") {
 370                                         dom.insertAfter(li, ulParent);
 371                                 } else if (isListNode(ulParent)) {
 372                                         dom.insertAfter(li, ul);
 373                                 } else {
 374                                         dom.insertAfter(createNewTextBlock(li), ul);
 375                                         dom.remove(li);
 376                                 }
 377
 378                                 return true;
 379                         }
 380
 381                         if (ulParent.nodeName == 'LI') {
 382                                 ul = ulParent;
 383                                 newBlock = createNewTextBlock(li, 'LI');
 384                         } else if (isListNode(ulParent)) {
 385                                 newBlock = createNewTextBlock(li, 'LI');
 386                         } else {
 387                                 newBlock = createNewTextBlock(li);
 388                         }
 389
 390                         splitList(ul, li, newBlock);
 391                         normalizeList(ul.parentNode);
 392
 393                         return true;
 394                 }
 395
 396                 function indent(li) {
 397                         var sibling, newList;
 398
 399                         function mergeLists(from, to) {
 400                                 var node;
 401
 402                                 if (isListNode(from)) {
 403                                         while ((node = li.lastChild.firstChild)) {
 404                                                 to.appendChild(node);
 405                                         }
 406
 407                                         dom.remove(from);
 408                                 }
 409                         }
 410
 411                         if (li.nodeName == 'DT') {
 412                                 dom.rename(li, 'DD');
 413                                 return true;
 414                         }
 415
 416                         sibling = li.previousSibling;
 417
 418                         if (sibling && isListNode(sibling)) {
 419                                 sibling.appendChild(li);
 420                                 return true;
 421                         }
 422
 423                         if (sibling && sibling.nodeName == 'LI' && isListNode(sibling.lastChild)) {
 424                                 sibling.lastChild.appendChild(li);
 425                                 mergeLists(li.lastChild, sibling.lastChild);
 426                                 return true;
 427                         }
 428
 429                         sibling = li.nextSibling;
 430
 431                         if (sibling && isListNode(sibling)) {
 432                                 sibling.insertBefore(li, sibling.firstChild);
 433                                 return true;
 434                         }
 435
 436                         /*if (sibling && sibling.nodeName == 'LI' && isListNode(li.lastChild)) {
 437                                 return false;
 438                         }*/
 439
 440                         sibling = li.previousSibling;
 441                         if (sibling && sibling.nodeName == 'LI') {
 442                                 newList = dom.create(li.parentNode.nodeName);
 443                                 sibling.appendChild(newList);
 444                                 newList.appendChild(li);
 445                                 mergeLists(li.lastChild, newList);
 446                                 return true;
 447                         }
 448
 449                         return false;
 450                 }
 451
 452                 function indentSelection() {
 453                         var listElements = getSelectedListItems();
 454
 455                         if (listElements.length) {
 456                                 var bookmark = createBookmark(selection.getRng(true));
 457
 458                                 for (var i = 0; i < listElements.length; i++) {
 459                                         if (!indent(listElements[i]) && i === 0) {
 460                                                 break;
 461                                         }
 462                                 }
 463
 464                                 moveToBookmark(bookmark);
 465                                 editor.nodeChanged();
 466
 467                                 return true;
 468                         }
 469                 }
 470
 471                 function outdentSelection() {
 472                         var listElements = getSelectedListItems();
 473
 474                         if (listElements.length) {
 475                                 var bookmark = createBookmark(selection.getRng(true));
 476                                 var i, y, root = editor.getBody();
 477
 478                                 i = listElements.length;
 479                                 while (i--) {
 480                                         var node = listElements[i].parentNode;
 481
 482                                         while (node && node != root) {
 483                                                 y = listElements.length;
 484                                                 while (y--) {
 485                                                         if (listElements[y] === node) {
 486                                                                 listElements.splice(i, 1);
 487                                                                 break;
 488                                                         }
 489                                                 }
 490
 491                                                 node = node.parentNode;
 492                                         }
 493                                 }
 494
 495                                 for (i = 0; i < listElements.length; i++) {
 496                                         if (!outdent(listElements[i]) && i === 0) {
 497                                                 break;
 498                                         }
 499                                 }
 500
 501                                 moveToBookmark(bookmark);
 502                                 editor.nodeChanged();
 503
 504                                 return true;
 505                         }
 506                 }
 507
 508                 function applyList(listName) {
 509                         var rng = selection.getRng(true), bookmark, listItemName = 'LI';
 510
 511                         if (dom.getContentEditable(selection.getNode()) === "false") {
 512                                 return;
 513                         }
 514
 515                         listName = listName.toUpperCase();
 516
 517                         if (listName == 'DL') {
 518                                 listItemName = 'DT';
 519                         }
 520
 521                         function getSelectedTextBlocks() {
 522                                 var textBlocks = [], root = editor.getBody();
 523
 524                                 function getEndPointNode(start) {
 525                                         var container, offset;
 526
 527                                         container = rng[start ? 'startContainer' : 'endContainer'];
 528                                         offset = rng[start ? 'startOffset' : 'endOffset'];
 529
 530                                         // Resolve node index
 531                                         if (container.nodeType == 1) {
 532                                                 container = container.childNodes[Math.min(offset, container.childNodes.length - 1)] || container;
 533                                         }
 534
 535                                         while (container.parentNode != root) {
 536                                                 if (isTextBlock(container)) {
 537                                                         return container;
 538                                                 }
 539
 540                                                 if (/^(TD|TH)$/.test(container.parentNode.nodeName)) {
 541                                                         return container;
 542                                                 }
 543
 544                                                 container = container.parentNode;
 545                                         }
 546
 547                                         return container;
 548                                 }
 549
 550                                 var startNode = getEndPointNode(true);
 551                                 var endNode = getEndPointNode();
 552                                 var block, siblings = [];
 553
 554                                 for (var node = startNode; node; node = node.nextSibling) {
 555                                         siblings.push(node);
 556
 557                                         if (node == endNode) {
 558                                                 break;
 559                                         }
 560                                 }
 561
 562                                 tinymce.each(siblings, function(node) {
 563                                         if (isTextBlock(node)) {
 564                                                 textBlocks.push(node);
 565                                                 block = null;
 566                                                 return;
 567                                         }
 568
 569                                         if (dom.isBlock(node) || isBr(node)) {
 570                                                 if (isBr(node)) {
 571                                                         dom.remove(node);
 572                                                 }
 573
 574                                                 block = null;
 575                                                 return;
 576                                         }
 577
 578                                         var nextSibling = node.nextSibling;
 579                                         if (tinymce.dom.BookmarkManager.isBookmarkNode(node)) {
 580                                                 if (isTextBlock(nextSibling) || (!nextSibling && node.parentNode == root)) {
 581                                                         block = null;
 582                                                         return;
 583                                                 }
 584                                         }
 585
 586                                         if (!block) {
 587                                                 block = dom.create('p');
 588                                                 node.parentNode.insertBefore(block, node);
 589                                                 textBlocks.push(block);
 590                                         }
 591
 592                                         block.appendChild(node);
 593                                 });
 594
 595                                 return textBlocks;
 596                         }
 597
 598                         bookmark = createBookmark(rng);
 599
 600                         tinymce.each(getSelectedTextBlocks(), function(block) {
 601                                 var listBlock, sibling;
 602
 603                                 sibling = block.previousSibling;
 604                                 if (sibling && isListNode(sibling) && sibling.nodeName == listName) {
 605                                         listBlock = sibling;
 606                                         block = dom.rename(block, listItemName);
 607                                         sibling.appendChild(block);
 608                                 } else {
 609                                         listBlock = dom.create(listName);
 610                                         block.parentNode.insertBefore(listBlock, block);
 611                                         listBlock.appendChild(block);
 612                                         block = dom.rename(block, listItemName);
 613                                 }
 614
 615                                 mergeWithAdjacentLists(listBlock);
 616                         });
 617
 618                         moveToBookmark(bookmark);
 619                 }
 620
 621                 function removeList() {
 622                         var bookmark = createBookmark(selection.getRng(true)), root = editor.getBody();
 623
 624                         tinymce.each(getSelectedListItems(), function(li) {
 625                                 var node, rootList;
 626
 627                                 if (isEditorBody(li.parentNode)) {
 628                                         return;
 629                                 }
 630
 631                                 if (isEmpty(li)) {
 632                                         outdent(li);
 633                                         return;
 634                                 }
 635
 636                                 for (node = li; node && node != root; node = node.parentNode) {
 637                                         if (isListNode(node)) {
 638                                                 rootList = node;
 639                                         }
 640                                 }
 641
 642                                 splitList(rootList, li);
 643                         });
 644
 645                         moveToBookmark(bookmark);
 646                 }
 647
 648                 function toggleList(listName) {
 649                         var parentList = dom.getParent(selection.getStart(), 'OL,UL,DL');
 650
 651                         if (isEditorBody(parentList)) {
 652                                 return;
 653                         }
 654
 655                         if (parentList) {
 656                                 if (parentList.nodeName == listName) {
 657                                         removeList(listName);
 658                                 } else {
 659                                         var bookmark = createBookmark(selection.getRng(true));
 660                                         mergeWithAdjacentLists(dom.rename(parentList, listName));
 661                                         moveToBookmark(bookmark);
 662                                 }
 663                         } else {
 664                                 applyList(listName);
 665                         }
 666                 }
 667
 668                 function queryListCommandState(listName) {
 669                         return function() {
 670                                 var parentList = dom.getParent(editor.selection.getStart(), 'UL,OL,DL');
 671
 672                                 return parentList && parentList.nodeName == listName;
 673                         };
 674                 }
 675
 676                 function isBogusBr(node) {
 677                         if (!isBr(node)) {
 678                                 return false;
 679                         }
 680
 681                         if (dom.isBlock(node.nextSibling) && !isBr(node.previousSibling)) {
 682                                 return true;
 683                         }
 684
 685                         return false;
 686                 }
 687
 688                 self.backspaceDelete = function(isForward) {
 689                         function findNextCaretContainer(rng, isForward) {
 690                                 var node = rng.startContainer, offset = rng.startOffset;
 691                                 var nonEmptyBlocks, walker;
 692
 693                                 if (node.nodeType == 3 && (isForward ? offset < node.data.length : offset > 0)) {
 694                                         return node;
 695                                 }
 696
 697                                 nonEmptyBlocks = editor.schema.getNonEmptyElements();
 698                                 if (node.nodeType == 1) {
 699                                         node = tinymce.dom.RangeUtils.getNode(node, offset);
 700                                 }
 701
 702                                 walker = new tinymce.dom.TreeWalker(node, editor.getBody());
 703
 704                                 // Delete at <li>|<br></li> then jump over the bogus br
 705                                 if (isForward) {
 706                                         if (isBogusBr(node)) {
 707                                                 walker.next();
 708                                         }
 709                                 }
 710
 711                                 while ((node = walker[isForward ? 'next' : 'prev2']())) {
 712                                         if (node.nodeName == 'LI' && !node.hasChildNodes()) {
 713                                                 return node;
 714                                         }
 715
 716                                         if (nonEmptyBlocks[node.nodeName]) {
 717                                                 return node;
 718                                         }
 719
 720                                         if (node.nodeType == 3 && node.data.length > 0) {
 721                                                 return node;
 722                                         }
 723                                 }
 724                         }
 725
 726                         function mergeLiElements(fromElm, toElm) {
 727                                 var node, listNode, ul = fromElm.parentNode;
 728
 729                                 if (!isChildOfBody(fromElm) || !isChildOfBody(toElm)) {
 730                                         return;
 731                                 }
 732
 733                                 if (isListNode(toElm.lastChild)) {
 734                                         listNode = toElm.lastChild;
 735                                 }
 736
 737                                 if (ul == toElm.lastChild) {
 738                                         if (isBr(ul.previousSibling)) {
 739                                                 dom.remove(ul.previousSibling);
 740                                         }
 741                                 }
 742
 743                                 node = toElm.lastChild;
 744                                 if (node && isBr(node) && fromElm.hasChildNodes()) {
 745                                         dom.remove(node);
 746                                 }
 747
 748                                 if (isEmpty(toElm, true)) {
 749                                         dom.$(toElm).empty();
 750                                 }
 751
 752                                 if (!isEmpty(fromElm, true)) {
 753                                         while ((node = fromElm.firstChild)) {
 754                                                 toElm.appendChild(node);
 755                                         }
 756                                 }
 757
 758                                 if (listNode) {
 759                                         toElm.appendChild(listNode);
 760                                 }
 761
 762                                 dom.remove(fromElm);
 763
 764                                 if (isEmpty(ul) && !isEditorBody(ul)) {
 765                                         dom.remove(ul);
 766                                 }
 767                         }
 768
 769                         if (selection.isCollapsed()) {
 770                                 var li = dom.getParent(selection.getStart(), 'LI'), ul, rng, otherLi;
 771
 772                                 if (li) {
 773                                         ul = li.parentNode;
 774                                         if (isEditorBody(ul) && dom.isEmpty(ul)) {
 775                                                 return true;
 776                                         }
 777
 778                                         rng = selection.getRng(true);
 779                                         otherLi = dom.getParent(findNextCaretContainer(rng, isForward), 'LI');
 780
 781                                         if (otherLi && otherLi != li) {
 782                                                 var bookmark = createBookmark(rng);
 783
 784                                                 if (isForward) {
 785                                                         mergeLiElements(otherLi, li);
 786                                                 } else {
 787                                                         mergeLiElements(li, otherLi);
 788                                                 }
 789
 790                                                 moveToBookmark(bookmark);
 791
 792                                                 return true;
 793                                         } else if (!otherLi) {
 794                                                 if (!isForward && removeList(ul.nodeName)) {
 795                                                         return true;
 796                                                 }
 797                                         }
 798                                 }
 799                         }
 800                 };
 801
 802                 editor.on('BeforeExecCommand', function(e) {
 803                         var cmd = e.command.toLowerCase(), isHandled;
 804
 805                         if (cmd == "indent") {
 806                                 if (indentSelection()) {
 807                                         isHandled = true;
 808                                 }
 809                         } else if (cmd == "outdent") {
 810                                 if (outdentSelection()) {
 811                                         isHandled = true;
 812                                 }
 813                         }
 814
 815                         if (isHandled) {
 816                                 editor.fire('ExecCommand', {command: e.command});
 817                                 e.preventDefault();
 818                                 return true;
 819                         }
 820                 });
 821
 822                 editor.addCommand('InsertUnorderedList', function() {
 823                         toggleList('UL');
 824                 });
 825
 826                 editor.addCommand('InsertOrderedList', function() {
 827                         toggleList('OL');
 828                 });
 829
 830                 editor.addCommand('InsertDefinitionList', function() {
 831                         toggleList('DL');
 832                 });
 833
 834                 editor.addQueryStateHandler('InsertUnorderedList', queryListCommandState('UL'));
 835                 editor.addQueryStateHandler('InsertOrderedList', queryListCommandState('OL'));
 836                 editor.addQueryStateHandler('InsertDefinitionList', queryListCommandState('DL'));
 837
 838                 editor.on('keydown', function(e) {
 839                         // Check for tab but not ctrl/cmd+tab since it switches browser tabs
 840                         if (e.keyCode != 9 || tinymce.util.VK.metaKeyPressed(e)) {
 841                                 return;
 842                         }
 843
 844                         if (editor.dom.getParent(editor.selection.getStart(), 'LI,DT,DD')) {
 845                                 e.preventDefault();
 846
 847                                 if (e.shiftKey) {
 848                                         outdentSelection();
 849                                 } else {
 850                                         indentSelection();
 851                                 }
 852                         }
 853                 });
 854         });
 855
 856         editor.addButton('indent', {
 857                 icon: 'indent',
 858                 title: 'Increase indent',
 859                 cmd: 'Indent',
 860                 onPostRender: function() {
 861                         var ctrl = this;
 862
 863                         editor.on('nodechange', function() {
 864                                 var blocks = editor.selection.getSelectedBlocks();
 865                                 var disable = false;
 866
 867                                 for (var i = 0, l = blocks.length; !disable && i < l; i++) {
 868                                         var tag = blocks[i].nodeName;
 869
 870                                         disable = (tag == 'LI' && isFirstChild(blocks[i]) || tag == 'UL' || tag == 'OL' || tag == 'DD');
 871                                 }
 872
 873                                 ctrl.disabled(disable);
 874                         });
 875                 }
 876         });
 877
 878         editor.on('keydown', function(e) {
 879                 if (e.keyCode == tinymce.util.VK.BACKSPACE) {
 880                         if (self.backspaceDelete()) {
 881                                 e.preventDefault();
 882                         }
 883                 } else if (e.keyCode == tinymce.util.VK.DELETE) {
 884                         if (self.backspaceDelete(true)) {
 885                                 e.preventDefault();
 886                         }
 887                 }
 888         });
 889 });