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[ckeditor.git] / _source / plugins / selection / plugin.js
1 /*
2 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
3 For licensing, see LICENSE.html or http://ckeditor.com/license
4 */
5
6 (function()
7 {
8 // #### checkSelectionChange : START
9
10 // The selection change check basically saves the element parent tree of
11 // the current node and check it on successive requests. If there is any
12 // change on the tree, then the selectionChange event gets fired.
13 function checkSelectionChange()
14 {
15 try
16 {
17 // In IE, the "selectionchange" event may still get thrown when
18 // releasing the WYSIWYG mode, so we need to check it first.
19 var sel = this.getSelection();
20 if ( !sel || !sel.document.getWindow().$ )
21 return;
22
23 var firstElement = sel.getStartElement();
24 var currentPath = new CKEDITOR.dom.elementPath( firstElement );
25
26 if ( !currentPath.compare( this._.selectionPreviousPath ) )
27 {
28 this._.selectionPreviousPath = currentPath;
29 this.fire( 'selectionChange', { selection : sel, path : currentPath, element : firstElement } );
30 }
31 }
32 catch (e)
33 {}
34 }
35
36 var checkSelectionChangeTimer,
37 checkSelectionChangeTimeoutPending;
38
39 function checkSelectionChangeTimeout()
40 {
41 // Firing the "OnSelectionChange" event on every key press started to
42 // be too slow. This function guarantees that there will be at least
43 // 200ms delay between selection checks.
44
45 checkSelectionChangeTimeoutPending = true;
46
47 if ( checkSelectionChangeTimer )
48 return;
49
50 checkSelectionChangeTimeoutExec.call( this );
51
52 checkSelectionChangeTimer = CKEDITOR.tools.setTimeout( checkSelectionChangeTimeoutExec, 200, this );
53 }
54
55 function checkSelectionChangeTimeoutExec()
56 {
57 checkSelectionChangeTimer = null;
58
59 if ( checkSelectionChangeTimeoutPending )
60 {
61 // Call this with a timeout so the browser properly moves the
62 // selection after the mouseup. It happened that the selection was
63 // being moved after the mouseup when clicking inside selected text
64 // with Firefox.
65 CKEDITOR.tools.setTimeout( checkSelectionChange, 0, this );
66
67 checkSelectionChangeTimeoutPending = false;
68 }
69 }
70
71 // #### checkSelectionChange : END
72
73 function rangeRequiresFix( range )
74 {
75 function isInlineCt( node )
76 {
77 return node && node.type == CKEDITOR.NODE_ELEMENT
78 && node.getName() in CKEDITOR.dtd.$removeEmpty;
79 }
80
81 function singletonBlock( node )
82 {
83 var body = range.document.getBody();
84 return !node.is( 'body' ) && body.getChildCount() == 1;
85 }
86
87 var start = range.startContainer,
88 offset = range.startOffset;
89
90 if ( start.type == CKEDITOR.NODE_TEXT )
91 return false;
92
93 // 1. Empty inline element. <span>^</span>
94 // 2. Adjoin to inline element. <p><strong>text</strong>^</p>
95 // 3. The only empty block in document. <body><p>^</p></body> (#7222)
96 return !CKEDITOR.tools.trim( start.getHtml() ) ? isInlineCt( start ) || singletonBlock( start )
97 : isInlineCt( start.getChild( offset - 1 ) ) || isInlineCt( start.getChild( offset ) );
98 }
99
100 var selectAllCmd =
101 {
102 modes : { wysiwyg : 1, source : 1 },
103 readOnly : CKEDITOR.env.ie || CKEDITOR.env.webkit,
104 exec : function( editor )
105 {
106 switch ( editor.mode )
107 {
108 case 'wysiwyg' :
109 editor.document.$.execCommand( 'SelectAll', false, null );
110 // Force triggering selectionChange (#7008)
111 editor.forceNextSelectionCheck();
112 editor.selectionChange();
113 break;
114 case 'source' :
115 // Select the contents of the textarea
116 var textarea = editor.textarea.$;
117 if ( CKEDITOR.env.ie )
118 textarea.createTextRange().execCommand( 'SelectAll' );
119 else
120 {
121 textarea.selectionStart = 0;
122 textarea.selectionEnd = textarea.value.length;
123 }
124 textarea.focus();
125 }
126 },
127 canUndo : false
128 };
129
130 function createFillingChar( doc )
131 {
132 removeFillingChar( doc );
133
134 var fillingChar = doc.createText( '\u200B' );
135 doc.setCustomData( 'cke-fillingChar', fillingChar );
136
137 return fillingChar;
138 }
139
140 function getFillingChar( doc )
141 {
142 return doc && doc.getCustomData( 'cke-fillingChar' );
143 }
144
145 // Checks if a filling char has been used, eventualy removing it (#1272).
146 function checkFillingChar( doc )
147 {
148 var fillingChar = doc && getFillingChar( doc );
149 if ( fillingChar )
150 {
151 // Use this flag to avoid removing the filling char right after
152 // creating it.
153 if ( fillingChar.getCustomData( 'ready' ) )
154 removeFillingChar( doc );
155 else
156 fillingChar.setCustomData( 'ready', 1 );
157 }
158 }
159
160 function removeFillingChar( doc )
161 {
162 var fillingChar = doc && doc.removeCustomData( 'cke-fillingChar' );
163 if ( fillingChar )
164 {
165 // We can't simply remove the filling node because the user
166 // will actually enlarge it when typing, so we just remove the
167 // invisible char from it.
168 fillingChar.setText( fillingChar.getText().replace( /\u200B/g, '' ) );
169 fillingChar = 0;
170 }
171 }
172
173 CKEDITOR.plugins.add( 'selection',
174 {
175 init : function( editor )
176 {
177 // On WebKit only, we need a special "filling" char on some situations
178 // (#1272). Here we set the events that should invalidate that char.
179 if ( CKEDITOR.env.webkit )
180 {
181 editor.on( 'selectionChange', function() { checkFillingChar( editor.document ); } );
182 editor.on( 'beforeSetMode', function() { removeFillingChar( editor.document ); } );
183 editor.on( 'key', function( e )
184 {
185 // Remove the filling char before some keys get
186 // executed, so they'll not get blocked by it.
187 switch ( e.data.keyCode )
188 {
189 case 13 : // ENTER
190 case CKEDITOR.SHIFT + 13 : // SHIFT-ENTER
191 case 37 : // LEFT-ARROW
192 case 39 : // RIGHT-ARROW
193 case 8 : // BACKSPACE
194 removeFillingChar( editor.document );
195 }
196 }, null, null, 10 );
197
198 var fillingCharBefore,
199 resetSelection;
200
201 function beforeData()
202 {
203 var doc = editor.document,
204 fillingChar = getFillingChar( doc );
205
206 if ( fillingChar )
207 {
208 // If cursor is right blinking by side of the filler node, save it for restoring,
209 // as the following text substitution will blind it. (#7437)
210 var sel = doc.$.defaultView.getSelection();
211 if ( sel.type == 'Caret' && sel.anchorNode == fillingChar.$ )
212 resetSelection = 1;
213
214 fillingCharBefore = fillingChar.getText();
215 fillingChar.setText( fillingCharBefore.replace( /\u200B/g, '' ) );
216 }
217 }
218 function afterData()
219 {
220 var doc = editor.document,
221 fillingChar = getFillingChar( doc );
222
223 if ( fillingChar )
224 {
225 fillingChar.setText( fillingCharBefore );
226
227 if ( resetSelection )
228 {
229 doc.$.defaultView.getSelection().setPosition( fillingChar.$,fillingChar.getLength() );
230 resetSelection = 0;
231 }
232 }
233 }
234 editor.on( 'beforeUndoImage', beforeData );
235 editor.on( 'afterUndoImage', afterData );
236 editor.on( 'beforeGetData', beforeData, null, null, 0 );
237 editor.on( 'getData', afterData );
238 }
239
240 editor.on( 'contentDom', function()
241 {
242 var doc = editor.document,
243 body = doc.getBody(),
244 html = doc.getDocumentElement();
245
246 if ( CKEDITOR.env.ie )
247 {
248 // Other browsers don't loose the selection if the
249 // editor document loose the focus. In IE, we don't
250 // have support for it, so we reproduce it here, other
251 // than firing the selection change event.
252
253 var savedRange,
254 saveEnabled,
255 restoreEnabled = 1;
256
257 // "onfocusin" is fired before "onfocus". It makes it
258 // possible to restore the selection before click
259 // events get executed.
260 body.on( 'focusin', function( evt )
261 {
262 // If there are elements with layout they fire this event but
263 // it must be ignored to allow edit its contents #4682
264 if ( evt.data.$.srcElement.nodeName != 'BODY' )
265 return;
266
267 // If we have saved a range, restore it at this
268 // point.
269 if ( savedRange )
270 {
271 if ( restoreEnabled )
272 {
273 // Well not break because of this.
274 try
275 {
276 savedRange.select();
277 }
278 catch (e)
279 {}
280
281 // Update locked selection because of the normalized text nodes. (#6083, #6987)
282 var lockedSelection = doc.getCustomData( 'cke_locked_selection' );
283 if ( lockedSelection )
284 {
285 lockedSelection.unlock();
286 lockedSelection.lock();
287 }
288 }
289
290 savedRange = null;
291 }
292 });
293
294 body.on( 'focus', function()
295 {
296 // Enable selections to be saved.
297 saveEnabled = 1;
298
299 saveSelection();
300 });
301
302 body.on( 'beforedeactivate', function( evt )
303 {
304 // Ignore this event if it's caused by focus switch between
305 // internal editable control type elements, e.g. layouted paragraph. (#4682)
306 if ( evt.data.$.toElement )
307 return;
308
309 // Disable selections from being saved.
310 saveEnabled = 0;
311 restoreEnabled = 1;
312 });
313
314 // IE before version 8 will leave cursor blinking inside the document after
315 // editor blurred unless we clean up the selection. (#4716)
316 if ( CKEDITOR.env.ie && CKEDITOR.env.version < 8 )
317 {
318 editor.on( 'blur', function( evt )
319 {
320 // Try/Catch to avoid errors if the editor is hidden. (#6375)
321 try
322 {
323 editor.document && editor.document.$.selection.empty();
324 }
325 catch (e) {}
326 });
327 }
328
329 // Listening on document element ensures that
330 // scrollbar is included. (#5280)
331 html.on( 'mousedown', function()
332 {
333 // Lock restore selection now, as we have
334 // a followed 'click' event which introduce
335 // new selection. (#5735)
336 restoreEnabled = 0;
337 });
338
339 html.on( 'mouseup', function()
340 {
341 restoreEnabled = 1;
342 });
343
344 // In IE6/7 the blinking cursor appears, but contents are
345 // not editable. (#5634)
346 if ( CKEDITOR.env.ie && ( CKEDITOR.env.ie7Compat || CKEDITOR.env.version < 8 || CKEDITOR.env.quirks ) )
347 {
348 // The 'click' event is not fired when clicking the
349 // scrollbars, so we can use it to check whether
350 // the empty space following <body> has been clicked.
351 html.on( 'click', function( evt )
352 {
353 if ( evt.data.getTarget().getName() == 'html' )
354 editor.getSelection().getRanges()[ 0 ].select();
355 });
356 }
357
358 var scroll;
359 // IE fires the "selectionchange" event when clicking
360 // inside a selection. We don't want to capture that.
361 body.on( 'mousedown', function( evt )
362 {
363 // IE scrolls document to top on right mousedown
364 // when editor has no focus, remember this scroll
365 // position and revert it before context menu opens. (#5778)
366 if ( evt.data.$.button == 2 )
367 {
368 var sel = editor.document.$.selection;
369 if ( sel.type == 'None' )
370 scroll = editor.window.getScrollPosition();
371 }
372 disableSave();
373 });
374
375 body.on( 'mouseup',
376 function( evt )
377 {
378 // Restore recorded scroll position when needed on right mouseup.
379 if ( evt.data.$.button == 2 && scroll )
380 {
381 editor.document.$.documentElement.scrollLeft = scroll.x;
382 editor.document.$.documentElement.scrollTop = scroll.y;
383 }
384 scroll = null;
385
386 saveEnabled = 1;
387 setTimeout( function()
388 {
389 saveSelection( true );
390 },
391 0 );
392 });
393
394 body.on( 'keydown', disableSave );
395 body.on( 'keyup',
396 function()
397 {
398 saveEnabled = 1;
399 saveSelection();
400 });
401
402
403 // IE is the only to provide the "selectionchange"
404 // event.
405 doc.on( 'selectionchange', saveSelection );
406
407 function disableSave()
408 {
409 saveEnabled = 0;
410 }
411
412 function saveSelection( testIt )
413 {
414 if ( saveEnabled )
415 {
416 var doc = editor.document,
417 sel = editor.getSelection(),
418 nativeSel = sel && sel.getNative();
419
420 // There is a very specific case, when clicking
421 // inside a text selection. In that case, the
422 // selection collapses at the clicking point,
423 // but the selection object remains in an
424 // unknown state, making createRange return a
425 // range at the very start of the document. In
426 // such situation we have to test the range, to
427 // be sure it's valid.
428 if ( testIt && nativeSel && nativeSel.type == 'None' )
429 {
430 // The "InsertImage" command can be used to
431 // test whether the selection is good or not.
432 // If not, it's enough to give some time to
433 // IE to put things in order for us.
434 if ( !doc.$.queryCommandEnabled( 'InsertImage' ) )
435 {
436 CKEDITOR.tools.setTimeout( saveSelection, 50, this, true );
437 return;
438 }
439 }
440
441 // Avoid saving selection from within text input. (#5747)
442 var parentTag;
443 if ( nativeSel && nativeSel.type && nativeSel.type != 'Control'
444 && ( parentTag = nativeSel.createRange() )
445 && ( parentTag = parentTag.parentElement() )
446 && ( parentTag = parentTag.nodeName )
447 && parentTag.toLowerCase() in { input: 1, textarea : 1 } )
448 {
449 return;
450 }
451
452 savedRange = nativeSel && sel.getRanges()[ 0 ];
453
454 checkSelectionChangeTimeout.call( editor );
455 }
456 }
457 }
458 else
459 {
460 // In other browsers, we make the selection change
461 // check based on other events, like clicks or keys
462 // press.
463
464 doc.on( 'mouseup', checkSelectionChangeTimeout, editor );
465 doc.on( 'keyup', checkSelectionChangeTimeout, editor );
466 }
467 });
468
469 // Clear the cached range path before unload. (#7174)
470 editor.on( 'contentDomUnload', editor.forceNextSelectionCheck, editor );
471
472 editor.addCommand( 'selectAll', selectAllCmd );
473 editor.ui.addButton( 'SelectAll',
474 {
475 label : editor.lang.selectAll,
476 command : 'selectAll'
477 });
478
479 editor.selectionChange = checkSelectionChangeTimeout;
480
481 // IE9 might cease to work if there's an object selection inside the iframe (#7639).
482 CKEDITOR.env.ie9Compat && editor.on( 'destroy', function()
483 {
484 var sel = editor.getSelection();
485 sel && sel.getNative().clear();
486 }, null, null, 9 );
487 }
488 });
489
490 /**
491 * Gets the current selection from the editing area when in WYSIWYG mode.
492 * @returns {CKEDITOR.dom.selection} A selection object or null if not on
493 * WYSIWYG mode or no selection is available.
494 * @example
495 * var selection = CKEDITOR.instances.editor1.<b>getSelection()</b>;
496 * alert( selection.getType() );
497 */
498 CKEDITOR.editor.prototype.getSelection = function()
499 {
500 return this.document && this.document.getSelection();
501 };
502
503 CKEDITOR.editor.prototype.forceNextSelectionCheck = function()
504 {
505 delete this._.selectionPreviousPath;
506 };
507
508 /**
509 * Gets the current selection from the document.
510 * @returns {CKEDITOR.dom.selection} A selection object.
511 * @example
512 * var selection = CKEDITOR.instances.editor1.document.<b>getSelection()</b>;
513 * alert( selection.getType() );
514 */
515 CKEDITOR.dom.document.prototype.getSelection = function()
516 {
517 var sel = new CKEDITOR.dom.selection( this );
518 return ( !sel || sel.isInvalid ) ? null : sel;
519 };
520
521 /**
522 * No selection.
523 * @constant
524 * @example
525 * if ( editor.getSelection().getType() == CKEDITOR.SELECTION_NONE )
526 * alert( 'Nothing is selected' );
527 */
528 CKEDITOR.SELECTION_NONE = 1;
529
530 /**
531 * Text or collapsed selection.
532 * @constant
533 * @example
534 * if ( editor.getSelection().getType() == CKEDITOR.SELECTION_TEXT )
535 * alert( 'Text is selected' );
536 */
537 CKEDITOR.SELECTION_TEXT = 2;
538
539 /**
540 * Element selection.
541 * @constant
542 * @example
543 * if ( editor.getSelection().getType() == CKEDITOR.SELECTION_ELEMENT )
544 * alert( 'An element is selected' );
545 */
546 CKEDITOR.SELECTION_ELEMENT = 3;
547
548 /**
549 * Manipulates the selection in a DOM document.
550 * @constructor
551 * @example
552 */
553 CKEDITOR.dom.selection = function( document )
554 {
555 var lockedSelection = document.getCustomData( 'cke_locked_selection' );
556
557 if ( lockedSelection )
558 return lockedSelection;
559
560 this.document = document;
561 this.isLocked = 0;
562 this._ =
563 {
564 cache : {}
565 };
566
567 /**
568 * IE BUG: The selection's document may be a different document than the
569 * editor document. Return null if that's the case.
570 */
571 if ( CKEDITOR.env.ie )
572 {
573 var range = this.getNative().createRange();
574 if ( !range
575 || ( range.item && range.item(0).ownerDocument != this.document.$ )
576 || ( range.parentElement && range.parentElement().ownerDocument != this.document.$ ) )
577 {
578 this.isInvalid = true;
579 }
580 }
581
582 return this;
583 };
584
585 var styleObjectElements =
586 {
587 img:1,hr:1,li:1,table:1,tr:1,td:1,th:1,embed:1,object:1,ol:1,ul:1,
588 a:1,input:1,form:1,select:1,textarea:1,button:1,fieldset:1,thead:1,tfoot:1
589 };
590
591 CKEDITOR.dom.selection.prototype =
592 {
593 /**
594 * Gets the native selection object from the browser.
595 * @function
596 * @returns {Object} The native selection object.
597 * @example
598 * var selection = editor.getSelection().<b>getNative()</b>;
599 */
600 getNative :
601 CKEDITOR.env.ie ?
602 function()
603 {
604 return this._.cache.nativeSel || ( this._.cache.nativeSel = this.document.$.selection );
605 }
606 :
607 function()
608 {
609 return this._.cache.nativeSel || ( this._.cache.nativeSel = this.document.getWindow().$.getSelection() );
610 },
611
612 /**
613 * Gets the type of the current selection. The following values are
614 * available:
615 * <ul>
616 * <li>{@link CKEDITOR.SELECTION_NONE} (1): No selection.</li>
617 * <li>{@link CKEDITOR.SELECTION_TEXT} (2): Text is selected or
618 * collapsed selection.</li>
619 * <li>{@link CKEDITOR.SELECTION_ELEMENT} (3): A element
620 * selection.</li>
621 * </ul>
622 * @function
623 * @returns {Number} One of the following constant values:
624 * {@link CKEDITOR.SELECTION_NONE}, {@link CKEDITOR.SELECTION_TEXT} or
625 * {@link CKEDITOR.SELECTION_ELEMENT}.
626 * @example
627 * if ( editor.getSelection().<b>getType()</b> == CKEDITOR.SELECTION_TEXT )
628 * alert( 'Text is selected' );
629 */
630 getType :
631 CKEDITOR.env.ie ?
632 function()
633 {
634 var cache = this._.cache;
635 if ( cache.type )
636 return cache.type;
637
638 var type = CKEDITOR.SELECTION_NONE;
639
640 try
641 {
642 var sel = this.getNative(),
643 ieType = sel.type;
644
645 if ( ieType == 'Text' )
646 type = CKEDITOR.SELECTION_TEXT;
647
648 if ( ieType == 'Control' )
649 type = CKEDITOR.SELECTION_ELEMENT;
650
651 // It is possible that we can still get a text range
652 // object even when type == 'None' is returned by IE.
653 // So we'd better check the object returned by
654 // createRange() rather than by looking at the type.
655 if ( sel.createRange().parentElement )
656 type = CKEDITOR.SELECTION_TEXT;
657 }
658 catch(e) {}
659
660 return ( cache.type = type );
661 }
662 :
663 function()
664 {
665 var cache = this._.cache;
666 if ( cache.type )
667 return cache.type;
668
669 var type = CKEDITOR.SELECTION_TEXT;
670
671 var sel = this.getNative();
672
673 if ( !sel )
674 type = CKEDITOR.SELECTION_NONE;
675 else if ( sel.rangeCount == 1 )
676 {
677 // Check if the actual selection is a control (IMG,
678 // TABLE, HR, etc...).
679
680 var range = sel.getRangeAt(0),
681 startContainer = range.startContainer;
682
683 if ( startContainer == range.endContainer
684 && startContainer.nodeType == 1
685 && ( range.endOffset - range.startOffset ) == 1
686 && styleObjectElements[ startContainer.childNodes[ range.startOffset ].nodeName.toLowerCase() ] )
687 {
688 type = CKEDITOR.SELECTION_ELEMENT;
689 }
690 }
691
692 return ( cache.type = type );
693 },
694
695 /**
696 * Retrieve the {@link CKEDITOR.dom.range} instances that represent the current selection.
697 * Note: Some browsers returns multiple ranges even on a sequent selection, e.g. Firefox returns
698 * one range for each table cell when one or more table row is selected.
699 * @return {Array}
700 * @example
701 * var ranges = selection.getRanges();
702 * alert(ranges.length);
703 */
704 getRanges : (function()
705 {
706 var func = CKEDITOR.env.ie ?
707 ( function()
708 {
709 function getNodeIndex( node ) { return new CKEDITOR.dom.node( node ).getIndex(); }
710
711 // Finds the container and offset for a specific boundary
712 // of an IE range.
713 var getBoundaryInformation = function( range, start )
714 {
715 // Creates a collapsed range at the requested boundary.
716 range = range.duplicate();
717 range.collapse( start );
718
719 // Gets the element that encloses the range entirely.
720 var parent = range.parentElement(),
721 doc = parent.ownerDocument;
722
723 // Empty parent element, e.g. <i>^</i>
724 if ( !parent.hasChildNodes() )
725 return { container : parent, offset : 0 };
726
727 var siblings = parent.children,
728 child,
729 sibling,
730 testRange = range.duplicate(),
731 startIndex = 0,
732 endIndex = siblings.length - 1,
733 index = -1,
734 position,
735 distance;
736
737 // Binary search over all element childs to test the range to see whether
738 // range is right on the boundary of one element.
739 while ( startIndex <= endIndex )
740 {
741 index = Math.floor( ( startIndex + endIndex ) / 2 );
742 child = siblings[ index ];
743 testRange.moveToElementText( child );
744 position = testRange.compareEndPoints( 'StartToStart', range );
745
746 if ( position > 0 )
747 endIndex = index - 1;
748 else if ( position < 0 )
749 startIndex = index + 1;
750 else
751 {
752 // IE9 report wrong measurement with compareEndPoints when range anchors between two BRs.
753 // e.g. <p>text<br />^<br /></p> (#7433)
754 if ( CKEDITOR.env.ie9Compat && child.tagName == 'BR' )
755 {
756 var bmId = 'cke_range_marker';
757 range.execCommand( 'CreateBookmark', false, bmId );
758 child = doc.getElementsByName( bmId )[ 0 ];
759 var offset = getNodeIndex( child );
760 parent.removeChild( child );
761 return { container : parent, offset : offset };
762 }
763 else
764 return { container : parent, offset : getNodeIndex( child ) };
765 }
766 }
767
768 // All childs are text nodes,
769 // or to the right hand of test range are all text nodes. (#6992)
770 if ( index == -1 || index == siblings.length - 1 && position < 0 )
771 {
772 // Adapt test range to embrace the entire parent contents.
773 testRange.moveToElementText( parent );
774 testRange.setEndPoint( 'StartToStart', range );
775
776 // IE report line break as CRLF with range.text but
777 // only LF with textnode.nodeValue, normalize them to avoid
778 // breaking character counting logic below. (#3949)
779 distance = testRange.text.replace( /(\r\n|\r)/g, '\n' ).length;
780
781 siblings = parent.childNodes;
782
783 // Actual range anchor right beside test range at the boundary of text node.
784 if ( !distance )
785 {
786 child = siblings[ siblings.length - 1 ];
787
788 if ( child.nodeType == CKEDITOR.NODE_ELEMENT )
789 return { container : parent, offset : siblings.length };
790 else
791 return { container : child, offset : child.nodeValue.length };
792 }
793
794 // Start the measuring until distance overflows, meanwhile count the text nodes.
795 var i = siblings.length;
796 while ( distance > 0 )
797 distance -= siblings[ --i ].nodeValue.length;
798
799 return { container : siblings[ i ], offset : -distance };
800 }
801 // Test range was one offset beyond OR behind the anchored text node.
802 else
803 {
804 // Adapt one side of test range to the actual range
805 // for measuring the offset between them.
806 testRange.collapse( position > 0 ? true : false );
807 testRange.setEndPoint( position > 0 ? 'StartToStart' : 'EndToStart', range );
808
809 // IE report line break as CRLF with range.text but
810 // only LF with textnode.nodeValue, normalize them to avoid
811 // breaking character counting logic below. (#3949)
812 distance = testRange.text.replace( /(\r\n|\r)/g, '\n' ).length;
813
814 // Actual range anchor right beside test range at the inner boundary of text node.
815 if ( !distance )
816 return { container : parent, offset : getNodeIndex( child ) + ( position > 0 ? 0 : 1 ) };
817
818 // Start the measuring until distance overflows, meanwhile count the text nodes.
819 while ( distance > 0 )
820 {
821 try
822 {
823 sibling = child[ position > 0 ? 'previousSibling' : 'nextSibling' ];
824 distance -= sibling.nodeValue.length;
825 child = sibling;
826 }
827 // Measurement in IE could be somtimes wrong because of <select> element. (#4611)
828 catch( e )
829 {
830 return { container : parent, offset : getNodeIndex( child ) };
831 }
832 }
833
834 return { container : child, offset : position > 0 ? -distance : child.nodeValue.length + distance };
835 }
836 };
837
838 return function()
839 {
840 // IE doesn't have range support (in the W3C way), so we
841 // need to do some magic to transform selections into
842 // CKEDITOR.dom.range instances.
843
844 var sel = this.getNative(),
845 nativeRange = sel && sel.createRange(),
846 type = this.getType(),
847 range;
848
849 if ( !sel )
850 return [];
851
852 if ( type == CKEDITOR.SELECTION_TEXT )
853 {
854 range = new CKEDITOR.dom.range( this.document );
855
856 var boundaryInfo = getBoundaryInformation( nativeRange, true );
857 range.setStart( new CKEDITOR.dom.node( boundaryInfo.container ), boundaryInfo.offset );
858
859 boundaryInfo = getBoundaryInformation( nativeRange );
860 range.setEnd( new CKEDITOR.dom.node( boundaryInfo.container ), boundaryInfo.offset );
861
862 // Correct an invalid IE range case on empty list item. (#5850)
863 if ( range.endContainer.getPosition( range.startContainer ) & CKEDITOR.POSITION_PRECEDING
864 && range.endOffset <= range.startContainer.getIndex() )
865 {
866 range.collapse();
867 }
868
869 return [ range ];
870 }
871 else if ( type == CKEDITOR.SELECTION_ELEMENT )
872 {
873 var retval = [];
874
875 for ( var i = 0 ; i < nativeRange.length ; i++ )
876 {
877 var element = nativeRange.item( i ),
878 parentElement = element.parentNode,
879 j = 0;
880
881 range = new CKEDITOR.dom.range( this.document );
882
883 for (; j < parentElement.childNodes.length && parentElement.childNodes[j] != element ; j++ )
884 { /*jsl:pass*/ }
885
886 range.setStart( new CKEDITOR.dom.node( parentElement ), j );
887 range.setEnd( new CKEDITOR.dom.node( parentElement ), j + 1 );
888 retval.push( range );
889 }
890
891 return retval;
892 }
893
894 return [];
895 };
896 })()
897 :
898 function()
899 {
900
901 // On browsers implementing the W3C range, we simply
902 // tranform the native ranges in CKEDITOR.dom.range
903 // instances.
904
905 var ranges = [],
906 range,
907 doc = this.document,
908 sel = this.getNative();
909
910 if ( !sel )
911 return ranges;
912
913 // On WebKit, it may happen that we'll have no selection
914 // available. We normalize it here by replicating the
915 // behavior of other browsers.
916 if ( !sel.rangeCount )
917 {
918 range = new CKEDITOR.dom.range( doc );
919 range.moveToElementEditStart( doc.getBody() );
920 ranges.push( range );
921 }
922
923 for ( var i = 0 ; i < sel.rangeCount ; i++ )
924 {
925 var nativeRange = sel.getRangeAt( i );
926
927 range = new CKEDITOR.dom.range( doc );
928
929 range.setStart( new CKEDITOR.dom.node( nativeRange.startContainer ), nativeRange.startOffset );
930 range.setEnd( new CKEDITOR.dom.node( nativeRange.endContainer ), nativeRange.endOffset );
931 ranges.push( range );
932 }
933 return ranges;
934 };
935
936 return function( onlyEditables )
937 {
938 var cache = this._.cache;
939 if ( cache.ranges && !onlyEditables )
940 return cache.ranges;
941 else if ( !cache.ranges )
942 cache.ranges = new CKEDITOR.dom.rangeList( func.call( this ) );
943
944 // Split range into multiple by read-only nodes.
945 if ( onlyEditables )
946 {
947 var ranges = cache.ranges;
948 for ( var i = 0; i < ranges.length; i++ )
949 {
950 var range = ranges[ i ];
951
952 // Drop range spans inside one ready-only node.
953 var parent = range.getCommonAncestor();
954 if ( parent.isReadOnly() )
955 ranges.splice( i, 1 );
956
957 if ( range.collapsed )
958 continue;
959
960 var startContainer = range.startContainer,
961 endContainer = range.endContainer,
962 startOffset = range.startOffset,
963 endOffset = range.endOffset,
964 walkerRange = range.clone();
965
966 // Range may start inside a non-editable element, restart range
967 // by the end of it.
968 var readOnly;
969 if ( ( readOnly = startContainer.isReadOnly() ) )
970 range.setStartAfter( readOnly );
971
972 // Enlarge range start/end with text node to avoid walker
973 // being DOM destructive, it doesn't interfere our checking
974 // of elements below as well.
975 if ( startContainer && startContainer.type == CKEDITOR.NODE_TEXT )
976 {
977 if ( startOffset >= startContainer.getLength() )
978 walkerRange.setStartAfter( startContainer );
979 else
980 walkerRange.setStartBefore( startContainer );
981 }
982
983 if ( endContainer && endContainer.type == CKEDITOR.NODE_TEXT )
984 {
985 if ( !endOffset )
986 walkerRange.setEndBefore( endContainer );
987 else
988 walkerRange.setEndAfter( endContainer );
989 }
990
991 // Looking for non-editable element inside the range.
992 var walker = new CKEDITOR.dom.walker( walkerRange );
993 walker.evaluator = function( node )
994 {
995 if ( node.type == CKEDITOR.NODE_ELEMENT
996 && node.isReadOnly() )
997 {
998 var newRange = range.clone();
999 range.setEndBefore( node );
1000
1001 // Drop collapsed range around read-only elements,
1002 // it make sure the range list empty when selecting
1003 // only non-editable elements.
1004 if ( range.collapsed )
1005 ranges.splice( i--, 1 );
1006
1007 // Avoid creating invalid range.
1008 if ( !( node.getPosition( walkerRange.endContainer ) & CKEDITOR.POSITION_CONTAINS ) )
1009 {
1010 newRange.setStartAfter( node );
1011 if ( !newRange.collapsed )
1012 ranges.splice( i + 1, 0, newRange );
1013 }
1014
1015 return true;
1016 }
1017
1018 return false;
1019 };
1020
1021 walker.next();
1022 }
1023 }
1024
1025 return cache.ranges;
1026 };
1027 })(),
1028
1029 /**
1030 * Gets the DOM element in which the selection starts.
1031 * @returns {CKEDITOR.dom.element} The element at the beginning of the
1032 * selection.
1033 * @example
1034 * var element = editor.getSelection().<b>getStartElement()</b>;
1035 * alert( element.getName() );
1036 */
1037 getStartElement : function()
1038 {
1039 var cache = this._.cache;
1040 if ( cache.startElement !== undefined )
1041 return cache.startElement;
1042
1043 var node,
1044 sel = this.getNative();
1045
1046 switch ( this.getType() )
1047 {
1048 case CKEDITOR.SELECTION_ELEMENT :
1049 return this.getSelectedElement();
1050
1051 case CKEDITOR.SELECTION_TEXT :
1052
1053 var range = this.getRanges()[0];
1054
1055 if ( range )
1056 {
1057 if ( !range.collapsed )
1058 {
1059 range.optimize();
1060
1061 // Decrease the range content to exclude particial
1062 // selected node on the start which doesn't have
1063 // visual impact. ( #3231 )
1064 while ( 1 )
1065 {
1066 var startContainer = range.startContainer,
1067 startOffset = range.startOffset;
1068 // Limit the fix only to non-block elements.(#3950)
1069 if ( startOffset == ( startContainer.getChildCount ?
1070 startContainer.getChildCount() : startContainer.getLength() )
1071 && !startContainer.isBlockBoundary() )
1072 range.setStartAfter( startContainer );
1073 else break;
1074 }
1075
1076 node = range.startContainer;
1077
1078 if ( node.type != CKEDITOR.NODE_ELEMENT )
1079 return node.getParent();
1080
1081 node = node.getChild( range.startOffset );
1082
1083 if ( !node || node.type != CKEDITOR.NODE_ELEMENT )
1084 node = range.startContainer;
1085 else
1086 {
1087 var child = node.getFirst();
1088 while ( child && child.type == CKEDITOR.NODE_ELEMENT )
1089 {
1090 node = child;
1091 child = child.getFirst();
1092 }
1093 }
1094 }
1095 else
1096 {
1097 node = range.startContainer;
1098 if ( node.type != CKEDITOR.NODE_ELEMENT )
1099 node = node.getParent();
1100 }
1101
1102 node = node.$;
1103 }
1104 }
1105
1106 return cache.startElement = ( node ? new CKEDITOR.dom.element( node ) : null );
1107 },
1108
1109 /**
1110 * Gets the current selected element.
1111 * @returns {CKEDITOR.dom.element} The selected element. Null if no
1112 * selection is available or the selection type is not
1113 * {@link CKEDITOR.SELECTION_ELEMENT}.
1114 * @example
1115 * var element = editor.getSelection().<b>getSelectedElement()</b>;
1116 * alert( element.getName() );
1117 */
1118 getSelectedElement : function()
1119 {
1120 var cache = this._.cache;
1121 if ( cache.selectedElement !== undefined )
1122 return cache.selectedElement;
1123
1124 var self = this;
1125
1126 var node = CKEDITOR.tools.tryThese(
1127 // Is it native IE control type selection?
1128 function()
1129 {
1130 return self.getNative().createRange().item( 0 );
1131 },
1132 // Figure it out by checking if there's a single enclosed
1133 // node of the range.
1134 function()
1135 {
1136 var range = self.getRanges()[ 0 ],
1137 enclosed,
1138 selected;
1139
1140 // Check first any enclosed element, e.g. <ul>[<li><a href="#">item</a></li>]</ul>
1141 for ( var i = 2; i && !( ( enclosed = range.getEnclosedNode() )
1142 && ( enclosed.type == CKEDITOR.NODE_ELEMENT )
1143 && styleObjectElements[ enclosed.getName() ]
1144 && ( selected = enclosed ) ); i-- )
1145 {
1146 // Then check any deep wrapped element, e.g. [<b><i><img /></i></b>]
1147 range.shrink( CKEDITOR.SHRINK_ELEMENT );
1148 }
1149
1150 return selected.$;
1151 });
1152
1153 return cache.selectedElement = ( node ? new CKEDITOR.dom.element( node ) : null );
1154 },
1155
1156 /**
1157 * Retrieves the text contained within the range, empty string is returned for non-text selection.
1158 * @returns {String} string of text within the current selection.
1159 * @since 3.6.1
1160 * @example
1161 * var text = editor.getSelectedText();
1162 * alert( text );
1163 */
1164 getSelectedText : function()
1165 {
1166 var cache = this._.cache;
1167 if ( cache.selectedText !== undefined )
1168 return cache.selectedText;
1169
1170 var text = '',
1171 nativeSel = this.getNative();
1172 if ( this.getType() == CKEDITOR.SELECTION_TEXT )
1173 text = CKEDITOR.env.ie ? nativeSel.createRange().text : nativeSel.toString();
1174
1175 return ( cache.selectedText = text );
1176 },
1177
1178 lock : function()
1179 {
1180 // Call all cacheable function.
1181 this.getRanges();
1182 this.getStartElement();
1183 this.getSelectedElement();
1184 this.getSelectedText();
1185
1186 // The native selection is not available when locked.
1187 this._.cache.nativeSel = {};
1188
1189 this.isLocked = 1;
1190
1191 // Save this selection inside the DOM document.
1192 this.document.setCustomData( 'cke_locked_selection', this );
1193 },
1194
1195 unlock : function( restore )
1196 {
1197 var doc = this.document,
1198 lockedSelection = doc.getCustomData( 'cke_locked_selection' );
1199
1200 if ( lockedSelection )
1201 {
1202 doc.setCustomData( 'cke_locked_selection', null );
1203
1204 if ( restore )
1205 {
1206 var selectedElement = lockedSelection.getSelectedElement(),
1207 ranges = !selectedElement && lockedSelection.getRanges();
1208
1209 this.isLocked = 0;
1210 this.reset();
1211
1212 doc.getBody().focus();
1213
1214 if ( selectedElement )
1215 this.selectElement( selectedElement );
1216 else
1217 this.selectRanges( ranges );
1218 }
1219 }
1220
1221 if ( !lockedSelection || !restore )
1222 {
1223 this.isLocked = 0;
1224 this.reset();
1225 }
1226 },
1227
1228 reset : function()
1229 {
1230 this._.cache = {};
1231 },
1232
1233 /**
1234 * Make the current selection of type {@link CKEDITOR.SELECTION_ELEMENT} by enclosing the specified element.
1235 * @param element
1236 */
1237 selectElement : function( element )
1238 {
1239 if ( this.isLocked )
1240 {
1241 var range = new CKEDITOR.dom.range( this.document );
1242 range.setStartBefore( element );
1243 range.setEndAfter( element );
1244
1245 this._.cache.selectedElement = element;
1246 this._.cache.startElement = element;
1247 this._.cache.ranges = new CKEDITOR.dom.rangeList( range );
1248 this._.cache.type = CKEDITOR.SELECTION_ELEMENT;
1249
1250 return;
1251 }
1252
1253 range = new CKEDITOR.dom.range( element.getDocument() );
1254 range.setStartBefore( element );
1255 range.setEndAfter( element );
1256 range.select();
1257
1258 this.document.fire( 'selectionchange' );
1259 this.reset();
1260
1261 },
1262
1263 /**
1264 * Adding the specified ranges to document selection preceding
1265 * by clearing up the original selection.
1266 * @param {CKEDITOR.dom.range} ranges
1267 */
1268 selectRanges : function( ranges )
1269 {
1270 if ( this.isLocked )
1271 {
1272 this._.cache.selectedElement = null;
1273 this._.cache.startElement = ranges[ 0 ] && ranges[ 0 ].getTouchedStartNode();
1274 this._.cache.ranges = new CKEDITOR.dom.rangeList( ranges );
1275 this._.cache.type = CKEDITOR.SELECTION_TEXT;
1276
1277 return;
1278 }
1279
1280 if ( CKEDITOR.env.ie )
1281 {
1282 if ( ranges.length > 1 )
1283 {
1284 // IE doesn't accept multiple ranges selection, so we join all into one.
1285 var last = ranges[ ranges.length -1 ] ;
1286 ranges[ 0 ].setEnd( last.endContainer, last.endOffset );
1287 ranges.length = 1;
1288 }
1289
1290 if ( ranges[ 0 ] )
1291 ranges[ 0 ].select();
1292
1293 this.reset();
1294 }
1295 else
1296 {
1297 var sel = this.getNative();
1298
1299 // getNative() returns null if iframe is "display:none" in FF. (#6577)
1300 if ( !sel )
1301 return;
1302
1303 if ( ranges.length )
1304 {
1305 sel.removeAllRanges();
1306 // Remove any existing filling char first.
1307 CKEDITOR.env.webkit && removeFillingChar( this.document );
1308 }
1309
1310 for ( var i = 0 ; i < ranges.length ; i++ )
1311 {
1312 // Joining sequential ranges introduced by
1313 // readonly elements protection.
1314 if ( i < ranges.length -1 )
1315 {
1316 var left = ranges[ i ], right = ranges[ i +1 ],
1317 between = left.clone();
1318 between.setStart( left.endContainer, left.endOffset );
1319 between.setEnd( right.startContainer, right.startOffset );
1320
1321 // Don't confused by Firefox adjancent multi-ranges
1322 // introduced by table cells selection.
1323 if ( !between.collapsed )
1324 {
1325 between.shrink( CKEDITOR.NODE_ELEMENT, true );
1326 var ancestor = between.getCommonAncestor(),
1327 enclosed = between.getEnclosedNode();
1328
1329 // The following cases has to be considered:
1330 // 1. <span contenteditable="false">[placeholder]</span>
1331 // 2. <input contenteditable="false" type="radio"/> (#6621)
1332 if ( ancestor.isReadOnly() || enclosed && enclosed.isReadOnly() )
1333 {
1334 right.setStart( left.startContainer, left.startOffset );
1335 ranges.splice( i--, 1 );
1336 continue;
1337 }
1338 }
1339 }
1340
1341 var range = ranges[ i ];
1342 var nativeRange = this.document.$.createRange();
1343 var startContainer = range.startContainer;
1344
1345 // In FF2, if we have a collapsed range, inside an empty
1346 // element, we must add something to it otherwise the caret
1347 // will not be visible.
1348 // In Opera instead, the selection will be moved out of the
1349 // element. (#4657)
1350 if ( range.collapsed &&
1351 ( CKEDITOR.env.opera || ( CKEDITOR.env.gecko && CKEDITOR.env.version < 10900 ) ) &&
1352 startContainer.type == CKEDITOR.NODE_ELEMENT &&
1353 !startContainer.getChildCount() )
1354 {
1355 startContainer.appendText( '' );
1356 }
1357
1358 if ( range.collapsed
1359 && CKEDITOR.env.webkit
1360 && rangeRequiresFix( range ) )
1361 {
1362 // Append a zero-width space so WebKit will not try to
1363 // move the selection by itself (#1272).
1364 var fillingChar = createFillingChar( this.document );
1365 range.insertNode( fillingChar ) ;
1366
1367 var next = fillingChar.getNext();
1368
1369 // If the filling char is followed by a <br>, whithout
1370 // having something before it, it'll not blink.
1371 // Let's remove it in this case.
1372 if ( next && !fillingChar.getPrevious() && next.type == CKEDITOR.NODE_ELEMENT && next.getName() == 'br' )
1373 {
1374 removeFillingChar( this.document );
1375 range.moveToPosition( next, CKEDITOR.POSITION_BEFORE_START );
1376 }
1377 else
1378 range.moveToPosition( fillingChar, CKEDITOR.POSITION_AFTER_END );
1379 }
1380
1381 nativeRange.setStart( range.startContainer.$, range.startOffset );
1382
1383 try
1384 {
1385 nativeRange.setEnd( range.endContainer.$, range.endOffset );
1386 }
1387 catch ( e )
1388 {
1389 // There is a bug in Firefox implementation (it would be too easy
1390 // otherwise). The new start can't be after the end (W3C says it can).
1391 // So, let's create a new range and collapse it to the desired point.
1392 if ( e.toString().indexOf( 'NS_ERROR_ILLEGAL_VALUE' ) >= 0 )
1393 {
1394 range.collapse( 1 );
1395 nativeRange.setEnd( range.endContainer.$, range.endOffset );
1396 }
1397 else
1398 throw e;
1399 }
1400
1401 // Select the range.
1402 sel.addRange( nativeRange );
1403 }
1404
1405 this.reset();
1406 }
1407 },
1408
1409 /**
1410 * Create bookmark for every single of this selection range (from #getRanges)
1411 * by calling the {@link CKEDITOR.dom.range.prototype.createBookmark} method,
1412 * with extra cares to avoid interferon among those ranges. Same arguments are
1413 * received as with the underlay range method.
1414 */
1415 createBookmarks : function( serializable )
1416 {
1417 return this.getRanges().createBookmarks( serializable );
1418 },
1419
1420 /**
1421 * Create bookmark for every single of this selection range (from #getRanges)
1422 * by calling the {@link CKEDITOR.dom.range.prototype.createBookmark2} method,
1423 * with extra cares to avoid interferon among those ranges. Same arguments are
1424 * received as with the underlay range method.
1425 */
1426 createBookmarks2 : function( normalized )
1427 {
1428 return this.getRanges().createBookmarks2( normalized );
1429 },
1430
1431 /**
1432 * Select the virtual ranges denote by the bookmarks by calling #selectRanges.
1433 * @param bookmarks
1434 */
1435 selectBookmarks : function( bookmarks )
1436 {
1437 var ranges = [];
1438 for ( var i = 0 ; i < bookmarks.length ; i++ )
1439 {
1440 var range = new CKEDITOR.dom.range( this.document );
1441 range.moveToBookmark( bookmarks[i] );
1442 ranges.push( range );
1443 }
1444 this.selectRanges( ranges );
1445 return this;
1446 },
1447
1448 /**
1449 * Retrieve the common ancestor node of the first range and the last range.
1450 */
1451 getCommonAncestor : function()
1452 {
1453 var ranges = this.getRanges(),
1454 startNode = ranges[ 0 ].startContainer,
1455 endNode = ranges[ ranges.length - 1 ].endContainer;
1456 return startNode.getCommonAncestor( endNode );
1457 },
1458
1459 /**
1460 * Moving scroll bar to the current selection's start position.
1461 */
1462 scrollIntoView : function()
1463 {
1464 // If we have split the block, adds a temporary span at the
1465 // range position and scroll relatively to it.
1466 var start = this.getStartElement();
1467 start.scrollIntoView();
1468 }
1469 };
1470 })();
1471
1472 ( function()
1473 {
1474 var notWhitespaces = CKEDITOR.dom.walker.whitespaces( true ),
1475 fillerTextRegex = /\ufeff|\u00a0/,
1476 nonCells = { table:1,tbody:1,tr:1 };
1477
1478 CKEDITOR.dom.range.prototype.select =
1479 CKEDITOR.env.ie ?
1480 // V2
1481 function( forceExpand )
1482 {
1483 var collapsed = this.collapsed,
1484 isStartMarkerAlone, dummySpan, ieRange;
1485
1486 // Try to make a object selection.
1487 var selected = this.getEnclosedNode();
1488 if ( selected )
1489 {
1490 try
1491 {
1492 ieRange = this.document.$.body.createControlRange();
1493 ieRange.addElement( selected.$ );
1494 ieRange.select();
1495 return;
1496 }
1497 catch( er ) {}
1498 }
1499
1500 // IE doesn't support selecting the entire table row/cell, move the selection into cells, e.g.
1501 // <table><tbody><tr>[<td>cell</b></td>... => <table><tbody><tr><td>[cell</td>...
1502 if ( this.startContainer.type == CKEDITOR.NODE_ELEMENT && this.startContainer.getName() in nonCells
1503 || this.endContainer.type == CKEDITOR.NODE_ELEMENT && this.endContainer.getName() in nonCells )
1504 {
1505 this.shrink( CKEDITOR.NODE_ELEMENT, true );
1506 }
1507
1508 var bookmark = this.createBookmark();
1509
1510 // Create marker tags for the start and end boundaries.
1511 var startNode = bookmark.startNode;
1512
1513 var endNode;
1514 if ( !collapsed )
1515 endNode = bookmark.endNode;
1516
1517 // Create the main range which will be used for the selection.
1518 ieRange = this.document.$.body.createTextRange();
1519
1520 // Position the range at the start boundary.
1521 ieRange.moveToElementText( startNode.$ );
1522 ieRange.moveStart( 'character', 1 );
1523
1524 if ( endNode )
1525 {
1526 // Create a tool range for the end.
1527 var ieRangeEnd = this.document.$.body.createTextRange();
1528
1529 // Position the tool range at the end.
1530 ieRangeEnd.moveToElementText( endNode.$ );
1531
1532 // Move the end boundary of the main range to match the tool range.
1533 ieRange.setEndPoint( 'EndToEnd', ieRangeEnd );
1534 ieRange.moveEnd( 'character', -1 );
1535 }
1536 else
1537 {
1538 // The isStartMarkerAlone logic comes from V2. It guarantees that the lines
1539 // will expand and that the cursor will be blinking on the right place.
1540 // Actually, we are using this flag just to avoid using this hack in all
1541 // situations, but just on those needed.
1542 var next = startNode.getNext( notWhitespaces );
1543 isStartMarkerAlone = ( !( next && next.getText && next.getText().match( fillerTextRegex ) ) // already a filler there?
1544 && ( forceExpand || !startNode.hasPrevious() || ( startNode.getPrevious().is && startNode.getPrevious().is( 'br' ) ) ) );
1545
1546 // Append a temporary <span>&#65279;</span> before the selection.
1547 // This is needed to avoid IE destroying selections inside empty
1548 // inline elements, like <b></b> (#253).
1549 // It is also needed when placing the selection right after an inline
1550 // element to avoid the selection moving inside of it.
1551 dummySpan = this.document.createElement( 'span' );
1552 dummySpan.setHtml( '&#65279;' ); // Zero Width No-Break Space (U+FEFF). See #1359.
1553 dummySpan.insertBefore( startNode );
1554
1555 if ( isStartMarkerAlone )
1556 {
1557 // To expand empty blocks or line spaces after <br>, we need
1558 // instead to have any char, which will be later deleted using the
1559 // selection.
1560 // \ufeff = Zero Width No-Break Space (U+FEFF). (#1359)
1561 this.document.createText( '\ufeff' ).insertBefore( startNode );
1562 }
1563 }
1564
1565 // Remove the markers (reset the position, because of the changes in the DOM tree).
1566 this.setStartBefore( startNode );
1567 startNode.remove();
1568
1569 if ( collapsed )
1570 {
1571 if ( isStartMarkerAlone )
1572 {
1573 // Move the selection start to include the temporary \ufeff.
1574 ieRange.moveStart( 'character', -1 );
1575
1576 ieRange.select();
1577
1578 // Remove our temporary stuff.
1579 this.document.$.selection.clear();
1580 }
1581 else
1582 ieRange.select();
1583
1584 this.moveToPosition( dummySpan, CKEDITOR.POSITION_BEFORE_START );
1585 dummySpan.remove();
1586 }
1587 else
1588 {
1589 this.setEndBefore( endNode );
1590 endNode.remove();
1591 ieRange.select();
1592 }
1593
1594 this.document.fire( 'selectionchange' );
1595 }
1596 :
1597 function()
1598 {
1599 this.document.getSelection().selectRanges( [ this ] );
1600 };
1601 } )();
ckeditor for Plinn