new ckeditor

New ckeditor

ckeditor/core/dom/comment.js

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+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.comment} class, which represents
+ *		a DOM comment node.
+ */
+
+/**
+ * Represents a DOM comment node.
+ *
+ *		var nativeNode = document.createComment( 'Example' );
+ *		var comment = new CKEDITOR.dom.comment( nativeNode );
+ *
+ *		var comment = new CKEDITOR.dom.comment( 'Example' );
+ *
+ * @class
+ * @extends CKEDITOR.dom.node
+ * @constructor Creates a comment class instance.
+ * @param {Object/String} comment A native DOM comment node or a string containing
+ * the text to use to create a new comment node.
+ * @param {CKEDITOR.dom.document} [ownerDocument] The document that will contain
+ * the node in case of new node creation. Defaults to the current document.
+ */
+CKEDITOR.dom.comment = function( comment, ownerDocument ) {
+	if ( typeof comment == 'string' )
+		comment = ( ownerDocument ? ownerDocument.$ : document ).createComment( comment );
+
+	CKEDITOR.dom.domObject.call( this, comment );
+};
+
+CKEDITOR.dom.comment.prototype = new CKEDITOR.dom.node();
+
+CKEDITOR.tools.extend( CKEDITOR.dom.comment.prototype, {
+	/**
+	 * The node type. This is a constant value set to {@link CKEDITOR#NODE_COMMENT}.
+	 *
+	 * @readonly
+	 * @property {Number} [=CKEDITOR.NODE_COMMENT]
+	 */
+	type: CKEDITOR.NODE_COMMENT,
+
+	/**
+	 * Gets the outer HTML of this comment.
+	 *
+	 * @returns {String} The HTML `<!-- comment value -->`.
+	 */
+	getOuterHtml: function() {
+		return '<!--' + this.$.nodeValue + '-->';
+	}
+} );

ckeditor/core/dom/document.js

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+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.document} class which
+ *		represents a DOM document.
+ */
+
+/**
+ * Represents a DOM document.
+ *
+ *		var document = new CKEDITOR.dom.document( document );
+ *
+ * @class
+ * @extends CKEDITOR.dom.domObject
+ * @constructor Creates a document class instance.
+ * @param {Object} domDocument A native DOM document.
+ */
+CKEDITOR.dom.document = function( domDocument ) {
+	CKEDITOR.dom.domObject.call( this, domDocument );
+};
+
+// PACKAGER_RENAME( CKEDITOR.dom.document )
+
+CKEDITOR.dom.document.prototype = new CKEDITOR.dom.domObject();
+
+CKEDITOR.tools.extend( CKEDITOR.dom.document.prototype, {
+	/**
+	 * The node type. This is a constant value set to {@link CKEDITOR#NODE_DOCUMENT}.
+	 *
+	 * @readonly
+	 * @property {Number} [=CKEDITOR.NODE_DOCUMENT]
+	 */
+	type: CKEDITOR.NODE_DOCUMENT,
+
+	/**
+	 * Appends a CSS file to the document.
+	 *
+	 *		CKEDITOR.document.appendStyleSheet( '/mystyles.css' );
+	 *
+	 * @param {String} cssFileUrl The CSS file URL.
+	 */
+	appendStyleSheet: function( cssFileUrl ) {
+		if ( this.$.createStyleSheet )
+			this.$.createStyleSheet( cssFileUrl );
+		else {
+			var link = new CKEDITOR.dom.element( 'link' );
+			link.setAttributes( {
+				rel: 'stylesheet',
+				type: 'text/css',
+				href: cssFileUrl
+			} );
+
+			this.getHead().append( link );
+		}
+	},
+
+	/**
+	 * Creates a CSS stylesheet and inserts it into the document.
+	 *
+	 * @param cssStyleText {String} CSS style text.
+	 * @returns {Object} The created DOM native stylesheet object.
+	 */
+	appendStyleText: function( cssStyleText ) {
+		if ( this.$.createStyleSheet ) {
+			var styleSheet = this.$.createStyleSheet( '' );
+			styleSheet.cssText = cssStyleText;
+		} else {
+			var style = new CKEDITOR.dom.element( 'style', this );
+			style.append( new CKEDITOR.dom.text( cssStyleText, this ) );
+			this.getHead().append( style );
+		}
+
+		return styleSheet || style.$.sheet;
+	},
+
+	/**
+	 * Creates a {@link CKEDITOR.dom.element} instance in this document.
+	 *
+	 * @param {String} name The name of the element.
+	 * @param {Object} [attributesAndStyles]
+	 * @param {Object} [attributesAndStyles.attributes] Attributes that will be set.
+	 * @param {Object} [attributesAndStyles.styles] Styles that will be set.
+	 * @returns {CKEDITOR.dom.element}
+	 */
+	createElement: function( name, attribsAndStyles ) {
+		var element = new CKEDITOR.dom.element( name, this );
+
+		if ( attribsAndStyles ) {
+			if ( attribsAndStyles.attributes )
+				element.setAttributes( attribsAndStyles.attributes );
+
+			if ( attribsAndStyles.styles )
+				element.setStyles( attribsAndStyles.styles );
+		}
+
+		return element;
+	},
+
+	/**
+	 * Creates a {@link CKEDITOR.dom.text} instance in this document.
+	 *
+	 * @param {String} text Value of the text node.
+	 * @returns {CKEDITOR.dom.element}
+	 */
+	createText: function( text ) {
+		return new CKEDITOR.dom.text( text, this );
+	},
+
+	/**
+	 * Moves the selection focus to this document's window.
+	 */
+	focus: function() {
+		this.getWindow().focus();
+	},
+
+	/**
+	 * Returns the element that is currently designated as the active element in the document.
+	 *
+	 * **Note:** Only one element can be active at a time in a document.
+	 * An active element does not necessarily have focus,
+	 * but an element with focus is always the active element in a document.
+	 *
+	 * @returns {CKEDITOR.dom.element} Active element or `null` if an IE8-9 bug is encountered.
+	 * See [#10030](http://dev.ckeditor.com/ticket/10030).
+	 */
+	getActive: function() {
+		var $active;
+		try {
+			$active = this.$.activeElement;
+		} catch ( e ) {
+			return null;
+		}
+		return new CKEDITOR.dom.element( $active );
+	},
+
+	/**
+	 * Gets an element based on its ID.
+	 *
+	 *		var element = CKEDITOR.document.getById( 'myElement' );
+	 *		alert( element.getId() ); // 'myElement'
+	 *
+	 * @param {String} elementId The element ID.
+	 * @returns {CKEDITOR.dom.element} The element instance, or `null` if not found.
+	 */
+	getById: function( elementId ) {
+		var $ = this.$.getElementById( elementId );
+		return $ ? new CKEDITOR.dom.element( $ ) : null;
+	},
+
+	/**
+	 * Gets a node based on its address. See {@link CKEDITOR.dom.node#getAddress}.
+	 *
+	 * @param {Array} address
+	 * @param {Boolean} [normalized=false]
+	 */
+	getByAddress: function( address, normalized ) {
+		var $ = this.$.documentElement;
+
+		for ( var i = 0; $ && i < address.length; i++ ) {
+			var target = address[ i ];
+
+			if ( !normalized ) {
+				$ = $.childNodes[ target ];
+				continue;
+			}
+
+			var currentIndex = -1;
+
+			for ( var j = 0; j < $.childNodes.length; j++ ) {
+				var candidate = $.childNodes[ j ];
+
+				if ( normalized === true && candidate.nodeType == 3 && candidate.previousSibling && candidate.previousSibling.nodeType == 3 )
+					continue;
+
+				currentIndex++;
+
+				if ( currentIndex == target ) {
+					$ = candidate;
+					break;
+				}
+			}
+		}
+
+		return $ ? new CKEDITOR.dom.node( $ ) : null;
+	},
+
+	/**
+	 * Gets elements list based on a given tag name.
+	 *
+	 * @param {String} tagName The element tag name.
+	 * @returns {CKEDITOR.dom.nodeList} The nodes list.
+	 */
+	getElementsByTag: function( tagName, namespace ) {
+		if ( !( CKEDITOR.env.ie && ( document.documentMode <= 8 ) ) && namespace )
+			tagName = namespace + ':' + tagName;
+		return new CKEDITOR.dom.nodeList( this.$.getElementsByTagName( tagName ) );
+	},
+
+	/**
+	 * Gets the `<head>` element for this document.
+	 *
+	 *		var element = CKEDITOR.document.getHead();
+	 *		alert( element.getName() ); // 'head'
+	 *
+	 * @returns {CKEDITOR.dom.element} The `<head>` element.
+	 */
+	getHead: function() {
+		var head = this.$.getElementsByTagName( 'head' )[ 0 ];
+		if ( !head )
+			head = this.getDocumentElement().append( new CKEDITOR.dom.element( 'head' ), true );
+		else
+			head = new CKEDITOR.dom.element( head );
+
+		return head;
+	},
+
+	/**
+	 * Gets the `<body>` element for this document.
+	 *
+	 *		var element = CKEDITOR.document.getBody();
+	 *		alert( element.getName() ); // 'body'
+	 *
+	 * @returns {CKEDITOR.dom.element} The `<body>` element.
+	 */
+	getBody: function() {
+		return new CKEDITOR.dom.element( this.$.body );
+	},
+
+	/**
+	 * Gets the DOM document element for this document.
+	 *
+	 * @returns {CKEDITOR.dom.element} The DOM document element.
+	 */
+	getDocumentElement: function() {
+		return new CKEDITOR.dom.element( this.$.documentElement );
+	},
+
+	/**
+	 * Gets the window object that stores this document.
+	 *
+	 * @returns {CKEDITOR.dom.window} The window object.
+	 */
+	getWindow: function() {
+		return new CKEDITOR.dom.window( this.$.parentWindow || this.$.defaultView );
+	},
+
+	/**
+	 * Defines the document content through `document.write`. Note that the
+	 * previous document content will be lost (cleaned).
+	 *
+	 *		document.write(
+	 *			'<html>' +
+	 *				'<head><title>Sample Document</title></head>' +
+	 *				'<body>Document content created by code.</body>' +
+	 *			'</html>'
+	 *		);
+	 *
+	 * @since 3.5
+	 * @param {String} html The HTML defining the document content.
+	 */
+	write: function( html ) {
+		// Don't leave any history log in IE. (#5657)
+		this.$.open( 'text/html', 'replace' );
+
+		// Support for custom document.domain in IE.
+		//
+		// The script must be appended because if placed before the
+		// doctype, IE will go into quirks mode and mess with
+		// the editable, e.g. by changing its default height.
+		if ( CKEDITOR.env.ie )
+			html = html.replace( /(?:^\s*<!DOCTYPE[^>]*?>)|^/i, '$&\n<script data-cke-temp="1">(' + CKEDITOR.tools.fixDomain + ')();</script>' );
+
+		this.$.write( html );
+		this.$.close();
+	},
+
+	/**
+	 * Wrapper for `querySelectorAll`. Returns a list of elements within this document that match
+	 * the specified `selector`.
+	 *
+	 * **Note:** The returned list is not a live collection (like the result of native `querySelectorAll`).
+	 *
+	 * @since 4.3
+	 * @param {String} selector
+	 * @returns {CKEDITOR.dom.nodeList}
+	 */
+	find: function( selector ) {
+		return new CKEDITOR.dom.nodeList( this.$.querySelectorAll( selector ) );
+	},
+
+	/**
+	 * Wrapper for `querySelector`. Returns the first element within this document that matches
+	 * the specified `selector`.
+	 *
+	 * @since 4.3
+	 * @param {String} selector
+	 * @returns {CKEDITOR.dom.element}
+	 */
+	findOne: function( selector ) {
+		var el = this.$.querySelector( selector );
+
+		return el ? new CKEDITOR.dom.element( el ) : null;
+	},
+
+	/**
+	 * Internet Explorer 8 only method. It returns a document fragment which has all HTML5 elements enabled.
+	 *
+	 * @since 4.3
+	 * @private
+	 * @returns DocumentFragment
+	 */
+	_getHtml5ShivFrag: function() {
+		var $frag = this.getCustomData( 'html5ShivFrag' );
+
+		if ( !$frag ) {
+			$frag = this.$.createDocumentFragment();
+			CKEDITOR.tools.enableHtml5Elements( $frag, true );
+			this.setCustomData( 'html5ShivFrag', $frag );
+		}
+
+		return $frag;
+	}
+} );

ckeditor/core/dom/documentfragment.js

@@ -0,0 +1,62 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * DocumentFragment is a "lightweight" or "minimal" Document object. It is
+ * commonly used to extract a portion of a document's tree or to create a new
+ * fragment of a document. Various operations may take document fragment objects
+ * as arguments and result in all the child nodes of the document fragment being
+ * moved to the child list of this node.
+ *
+ * @class
+ * @constructor Creates a document fragment class instance.
+ * @param {CKEDITOR.dom.document/DocumentFragment} [nodeOrDoc=CKEDITOR.document]
+ */
+CKEDITOR.dom.documentFragment = function( nodeOrDoc ) {
+	nodeOrDoc = nodeOrDoc || CKEDITOR.document;
+
+	if ( nodeOrDoc.type == CKEDITOR.NODE_DOCUMENT )
+		this.$ = nodeOrDoc.$.createDocumentFragment();
+	else
+		this.$ = nodeOrDoc;
+};
+
+CKEDITOR.tools.extend( CKEDITOR.dom.documentFragment.prototype, CKEDITOR.dom.element.prototype, {
+	/**
+	 * The node type. This is a constant value set to {@link CKEDITOR#NODE_DOCUMENT_FRAGMENT}.
+	 *
+	 * @readonly
+	 * @property {Number} [=CKEDITOR.NODE_DOCUMENT_FRAGMENT]
+	 */
+	type: CKEDITOR.NODE_DOCUMENT_FRAGMENT,
+
+	/**
+	 * Inserts the document fragment content after the specified node.
+	 *
+	 * @param {CKEDITOR.dom.node} node
+	 */
+	insertAfterNode: function( node ) {
+		node = node.$;
+		node.parentNode.insertBefore( this.$, node.nextSibling );
+	},
+
+	/**
+	 * Gets HTML of this document fragment's children.
+	 *
+	 * @since 4.5
+	 * @returns {String} The HTML of this document fragment's children.
+	 */
+	getHtml: function() {
+		var container = new CKEDITOR.dom.element( 'div' );
+
+		this.clone( 1, 1 ).appendTo( container );
+
+		return container.getHtml().replace( /\s*data-cke-expando=".*?"/g, '' );
+	}
+}, true, {
+	'append': 1, 'appendBogus': 1, 'clone': 1, 'getFirst': 1, 'getHtml': 1, 'getLast': 1, 'getParent': 1, 'getNext': 1, 'getPrevious': 1,
+	'appendTo': 1, 'moveChildren': 1, 'insertBefore': 1, 'insertAfterNode': 1, 'replace': 1, 'trim': 1, 'type': 1,
+	'ltrim': 1, 'rtrim': 1, 'getDocument': 1, 'getChildCount': 1, 'getChild': 1, 'getChildren': 1
+} );

ckeditor/core/dom/domobject.js

@@ -0,0 +1,266 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.editor} class, which is the base
+ *		for other classes representing DOM objects.
+ */
+
+/**
+ * Represents a DOM object. This class is not intended to be used directly. It
+ * serves as the base class for other classes representing specific DOM
+ * objects.
+ *
+ * @class
+ * @mixins CKEDITOR.event
+ * @constructor Creates a domObject class instance.
+ * @param {Object} nativeDomObject A native DOM object.
+ */
+CKEDITOR.dom.domObject = function( nativeDomObject ) {
+	if ( nativeDomObject ) {
+		/**
+		 * The native DOM object represented by this class instance.
+		 *
+		 *		var element = new CKEDITOR.dom.element( 'span' );
+		 *		alert( element.$.nodeType ); // '1'
+		 *
+		 * @readonly
+		 * @property {Object}
+		 */
+		this.$ = nativeDomObject;
+	}
+};
+
+CKEDITOR.dom.domObject.prototype = ( function() {
+	// Do not define other local variables here. We want to keep the native
+	// listener closures as clean as possible.
+
+	var getNativeListener = function( domObject, eventName ) {
+			return function( domEvent ) {
+				// In FF, when reloading the page with the editor focused, it may
+				// throw an error because the CKEDITOR global is not anymore
+				// available. So, we check it here first. (#2923)
+				if ( typeof CKEDITOR != 'undefined' )
+					domObject.fire( eventName, new CKEDITOR.dom.event( domEvent ) );
+			};
+		};
+
+	return {
+
+		/**
+		 * Gets the private `_` object which is bound to the native
+		 * DOM object using {@link #getCustomData}.
+		 *
+		 *		var elementA = new CKEDITOR.dom.element( nativeElement );
+		 *		elementA.getPrivate().value = 1;
+		 *		...
+		 *		var elementB = new CKEDITOR.dom.element( nativeElement );
+		 *		elementB.getPrivate().value; // 1
+		 *
+		 * @returns {Object} The private object.
+		 */
+		getPrivate: function() {
+			var priv;
+
+			// Get the main private object from the custom data. Create it if not defined.
+			if ( !( priv = this.getCustomData( '_' ) ) )
+				this.setCustomData( '_', ( priv = {} ) );
+
+			return priv;
+		},
+
+		// Docs inherited from event.
+		on: function( eventName ) {
+			// We customize the "on" function here. The basic idea is that we'll have
+			// only one listener for a native event, which will then call all listeners
+			// set to the event.
+
+			// Get the listeners holder object.
+			var nativeListeners = this.getCustomData( '_cke_nativeListeners' );
+
+			if ( !nativeListeners ) {
+				nativeListeners = {};
+				this.setCustomData( '_cke_nativeListeners', nativeListeners );
+			}
+
+			// Check if we have a listener for that event.
+			if ( !nativeListeners[ eventName ] ) {
+				var listener = nativeListeners[ eventName ] = getNativeListener( this, eventName );
+
+				if ( this.$.addEventListener )
+					this.$.addEventListener( eventName, listener, !!CKEDITOR.event.useCapture );
+				else if ( this.$.attachEvent )
+					this.$.attachEvent( 'on' + eventName, listener );
+			}
+
+			// Call the original implementation.
+			return CKEDITOR.event.prototype.on.apply( this, arguments );
+		},
+
+		// Docs inherited from event.
+		removeListener: function( eventName ) {
+			// Call the original implementation.
+			CKEDITOR.event.prototype.removeListener.apply( this, arguments );
+
+			// If we don't have listeners for this event, clean the DOM up.
+			if ( !this.hasListeners( eventName ) ) {
+				var nativeListeners = this.getCustomData( '_cke_nativeListeners' );
+				var listener = nativeListeners && nativeListeners[ eventName ];
+				if ( listener ) {
+					if ( this.$.removeEventListener )
+						this.$.removeEventListener( eventName, listener, false );
+					else if ( this.$.detachEvent )
+						this.$.detachEvent( 'on' + eventName, listener );
+
+					delete nativeListeners[ eventName ];
+				}
+			}
+		},
+
+		/**
+		 * Removes any listener set on this object.
+		 *
+		 * To avoid memory leaks we must assure that there are no
+		 * references left after the object is no longer needed.
+		 */
+		removeAllListeners: function() {
+			var nativeListeners = this.getCustomData( '_cke_nativeListeners' );
+			for ( var eventName in nativeListeners ) {
+				var listener = nativeListeners[ eventName ];
+				if ( this.$.detachEvent )
+					this.$.detachEvent( 'on' + eventName, listener );
+				else if ( this.$.removeEventListener )
+					this.$.removeEventListener( eventName, listener, false );
+
+				delete nativeListeners[ eventName ];
+			}
+
+			// Remove events from events object so fire() method will not call
+			// listeners (#11400).
+			CKEDITOR.event.prototype.removeAllListeners.call( this );
+		}
+	};
+} )();
+
+( function( domObjectProto ) {
+	var customData = {};
+
+	CKEDITOR.on( 'reset', function() {
+		customData = {};
+	} );
+
+	/**
+	 * Determines whether the specified object is equal to the current object.
+	 *
+	 *		var doc = new CKEDITOR.dom.document( document );
+	 *		alert( doc.equals( CKEDITOR.document ) );	// true
+	 *		alert( doc == CKEDITOR.document );			// false
+	 *
+	 * @param {Object} object The object to compare with the current object.
+	 * @returns {Boolean} `true` if the object is equal.
+	 */
+	domObjectProto.equals = function( object ) {
+		// Try/Catch to avoid IE permission error when object is from different document.
+		try {
+			return ( object && object.$ === this.$ );
+		} catch ( er ) {
+			return false;
+		}
+	};
+
+	/**
+	 * Sets a data slot value for this object. These values are shared by all
+	 * instances pointing to that same DOM object.
+	 *
+	 * **Note:** The created data slot is only guaranteed to be available on this unique DOM node,
+	 * thus any wish to continue access to it from other element clones (either created by
+	 * clone node or from `innerHtml`) will fail. For such usage please use
+	 * {@link CKEDITOR.dom.element#setAttribute} instead.
+	 *
+	 * **Note**: This method does not work on text nodes prior to Internet Explorer 9.
+	 *
+	 *		var element = new CKEDITOR.dom.element( 'span' );
+	 *		element.setCustomData( 'hasCustomData', true );
+	 *
+	 * @param {String} key A key used to identify the data slot.
+	 * @param {Object} value The value to set to the data slot.
+	 * @returns {CKEDITOR.dom.domObject} This DOM object instance.
+	 * @chainable
+	 */
+	domObjectProto.setCustomData = function( key, value ) {
+		var expandoNumber = this.getUniqueId(),
+			dataSlot = customData[ expandoNumber ] || ( customData[ expandoNumber ] = {} );
+
+		dataSlot[ key ] = value;
+
+		return this;
+	};
+
+	/**
+	 * Gets the value set to a data slot in this object.
+	 *
+	 *		var element = new CKEDITOR.dom.element( 'span' );
+	 *		alert( element.getCustomData( 'hasCustomData' ) );		// e.g. 'true'
+	 *		alert( element.getCustomData( 'nonExistingKey' ) );		// null
+	 *
+	 * @param {String} key The key used to identify the data slot.
+	 * @returns {Object} This value set to the data slot.
+	 */
+	domObjectProto.getCustomData = function( key ) {
+		var expandoNumber = this.$[ 'data-cke-expando' ],
+			dataSlot = expandoNumber && customData[ expandoNumber ];
+
+		return ( dataSlot && key in dataSlot ) ? dataSlot[ key ] : null;
+	};
+
+	/**
+	 * Removes the value in the data slot under the given `key`.
+	 *
+	 * @param {String} key
+	 * @returns {Object} Removed value or `null` if not found.
+	 */
+	domObjectProto.removeCustomData = function( key ) {
+		var expandoNumber = this.$[ 'data-cke-expando' ],
+			dataSlot = expandoNumber && customData[ expandoNumber ],
+			retval, hadKey;
+
+		if ( dataSlot ) {
+			retval = dataSlot[ key ];
+			hadKey = key in dataSlot;
+			delete dataSlot[ key ];
+		}
+
+		return hadKey ? retval : null;
+	};
+
+	/**
+	 * Removes any data stored in this object.
+	 * To avoid memory leaks we must assure that there are no
+	 * references left after the object is no longer needed.
+	 */
+	domObjectProto.clearCustomData = function() {
+		// Clear all event listeners
+		this.removeAllListeners();
+
+		var expandoNumber = this.$[ 'data-cke-expando' ];
+		expandoNumber && delete customData[ expandoNumber ];
+	};
+
+	/**
+	 * Gets an ID that can be used to identify this DOM object in
+	 * the running session.
+	 *
+	 * **Note**: This method does not work on text nodes prior to Internet Explorer 9.
+	 *
+	 * @returns {Number} A unique ID.
+	 */
+	domObjectProto.getUniqueId = function() {
+		return this.$[ 'data-cke-expando' ] || ( this.$[ 'data-cke-expando' ] = CKEDITOR.tools.getNextNumber() );
+	};
+
+	// Implement CKEDITOR.event.
+	CKEDITOR.event.implementOn( domObjectProto );
+
+} )( CKEDITOR.dom.domObject.prototype );

ckeditor/core/dom/elementpath.js

@@ -0,0 +1,251 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+'use strict';
+
+( function() {
+
+	var pathBlockLimitElements = {},
+		pathBlockElements = {},
+		tag;
+
+	// Elements that are considered the "Block limit" in an element path.
+	for ( tag in CKEDITOR.dtd.$blockLimit ) {
+		// Exclude from list roots.
+		if ( !( tag in CKEDITOR.dtd.$list ) )
+			pathBlockLimitElements[ tag ] = 1;
+	}
+
+	// Elements that are considered the "End level Block" in an element path.
+	for ( tag in CKEDITOR.dtd.$block ) {
+		// Exclude block limits, and empty block element, e.g. hr.
+		if ( !( tag in CKEDITOR.dtd.$blockLimit || tag in CKEDITOR.dtd.$empty ) )
+			pathBlockElements[ tag ] = 1;
+	}
+
+	// Check if an element contains any block element.
+	function checkHasBlock( element ) {
+		var childNodes = element.getChildren();
+
+		for ( var i = 0, count = childNodes.count(); i < count; i++ ) {
+			var child = childNodes.getItem( i );
+
+			if ( child.type == CKEDITOR.NODE_ELEMENT && CKEDITOR.dtd.$block[ child.getName() ] )
+				return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Retrieve the list of nodes walked from the start node up to the editable element of the editor.
+	 *
+	 * @class
+	 * @constructor Creates an element path class instance.
+	 * @param {CKEDITOR.dom.element} startNode From which the path should start.
+	 * @param {CKEDITOR.dom.element} root To which element the path should stop, defaults to the `body` element.
+	 */
+	CKEDITOR.dom.elementPath = function( startNode, root ) {
+		var block = null,
+			blockLimit = null,
+			elements = [],
+			e = startNode,
+			elementName;
+
+		// Backward compact.
+		root = root || startNode.getDocument().getBody();
+
+		do {
+			if ( e.type == CKEDITOR.NODE_ELEMENT ) {
+				elements.push( e );
+
+				if ( !this.lastElement ) {
+					this.lastElement = e;
+
+					// If an object or non-editable element is fully selected at the end of the element path,
+					// it must not become the block limit.
+					if ( e.is( CKEDITOR.dtd.$object ) || e.getAttribute( 'contenteditable' ) == 'false' )
+						continue;
+				}
+
+				if ( e.equals( root ) )
+					break;
+
+				if ( !blockLimit ) {
+					elementName = e.getName();
+
+					// First editable element becomes a block limit, because it cannot be split.
+					if ( e.getAttribute( 'contenteditable' ) == 'true' )
+						blockLimit = e;
+					// "Else" because element cannot be both - block and block levelimit.
+					else if ( !block && pathBlockElements[ elementName ] )
+						block = e;
+
+					if ( pathBlockLimitElements[ elementName ] ) {
+						// End level DIV is considered as the block, if no block is available. (#525)
+						// But it must NOT be the root element (checked above).
+						if ( !block && elementName == 'div' && !checkHasBlock( e ) )
+							block = e;
+						else
+							blockLimit = e;
+					}
+				}
+			}
+		}
+		while ( ( e = e.getParent() ) );
+
+		// Block limit defaults to root.
+		if ( !blockLimit )
+			blockLimit = root;
+
+		/**
+		 * First non-empty block element which:
+		 *
+		 * * is not a {@link CKEDITOR.dtd#$blockLimit},
+		 * * or is a `div` which does not contain block elements and is not a `root`.
+		 *
+		 * This means a first, splittable block in elements path.
+		 *
+		 * @readonly
+		 * @property {CKEDITOR.dom.element}
+		 */
+		this.block = block;
+
+		/**
+		 * See the {@link CKEDITOR.dtd#$blockLimit} description.
+		 *
+		 * @readonly
+		 * @property {CKEDITOR.dom.element}
+		 */
+		this.blockLimit = blockLimit;
+
+		/**
+		 * The root of the elements path - `root` argument passed to class constructor or a `body` element.
+		 *
+		 * @readonly
+		 * @property {CKEDITOR.dom.element}
+		 */
+		this.root = root;
+
+		/**
+		 * An array of elements (from `startNode` to `root`) in the path.
+		 *
+		 * @readonly
+		 * @property {CKEDITOR.dom.element[]}
+		 */
+		this.elements = elements;
+
+		/**
+		 * The last element of the elements path - `startNode` or its parent.
+		 *
+		 * @readonly
+		 * @property {CKEDITOR.dom.element} lastElement
+		 */
+	};
+
+} )();
+
+CKEDITOR.dom.elementPath.prototype = {
+	/**
+	 * Compares this element path with another one.
+	 *
+	 * @param {CKEDITOR.dom.elementPath} otherPath The elementPath object to be
+	 * compared with this one.
+	 * @returns {Boolean} `true` if the paths are equal, containing the same
+	 * number of elements and the same elements in the same order.
+	 */
+	compare: function( otherPath ) {
+		var thisElements = this.elements;
+		var otherElements = otherPath && otherPath.elements;
+
+		if ( !otherElements || thisElements.length != otherElements.length )
+			return false;
+
+		for ( var i = 0; i < thisElements.length; i++ ) {
+			if ( !thisElements[ i ].equals( otherElements[ i ] ) )
+				return false;
+		}
+
+		return true;
+	},
+
+	/**
+	 * Search the path elements that meets the specified criteria.
+	 *
+	 * @param {String/Array/Function/Object/CKEDITOR.dom.element} query The criteria that can be
+	 * either a tag name, list (array and object) of tag names, element or an node evaluator function.
+	 * @param {Boolean} [excludeRoot] Not taking path root element into consideration.
+	 * @param {Boolean} [fromTop] Search start from the topmost element instead of bottom.
+	 * @returns {CKEDITOR.dom.element} The first matched dom element or `null`.
+	 */
+	contains: function( query, excludeRoot, fromTop ) {
+		var evaluator;
+		if ( typeof query == 'string' )
+			evaluator = function( node ) {
+				return node.getName() == query;
+			};
+		if ( query instanceof CKEDITOR.dom.element )
+			evaluator = function( node ) {
+				return node.equals( query );
+			};
+		else if ( CKEDITOR.tools.isArray( query ) )
+			evaluator = function( node ) {
+				return CKEDITOR.tools.indexOf( query, node.getName() ) > -1;
+			};
+		else if ( typeof query == 'function' )
+			evaluator = query;
+		else if ( typeof query == 'object' )
+			evaluator = function( node ) {
+				return node.getName() in query;
+			};
+
+		var elements = this.elements,
+			length = elements.length;
+		excludeRoot && length--;
+
+		if ( fromTop ) {
+			elements = Array.prototype.slice.call( elements, 0 );
+			elements.reverse();
+		}
+
+		for ( var i = 0; i < length; i++ ) {
+			if ( evaluator( elements[ i ] ) )
+				return elements[ i ];
+		}
+
+		return null;
+	},
+
+	/**
+	 * Check whether the elements path is the proper context for the specified
+	 * tag name in the DTD.
+	 *
+	 * @param {String} tag The tag name.
+	 * @returns {Boolean}
+	 */
+	isContextFor: function( tag ) {
+		var holder;
+
+		// Check for block context.
+		if ( tag in CKEDITOR.dtd.$block ) {
+			// Indeterminate elements which are not subjected to be splitted or surrounded must be checked first.
+			var inter = this.contains( CKEDITOR.dtd.$intermediate );
+			holder = inter || ( this.root.equals( this.block ) && this.block ) || this.blockLimit;
+			return !!holder.getDtd()[ tag ];
+		}
+
+		return true;
+	},
+
+	/**
+	 * Retrieve the text direction for this elements path.
+	 *
+	 * @returns {'ltr'/'rtl'}
+	 */
+	direction: function() {
+		var directionNode = this.block || this.blockLimit || this.root;
+		return directionNode.getDirection( 1 );
+	}
+};

ckeditor/core/dom/event.js

@@ -0,0 +1,208 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.event} class, which
+ *		represents the a native DOM event object.
+ */
+
+/**
+ * Represents a native DOM event object.
+ *
+ * @class
+ * @constructor Creates an event class instance.
+ * @param {Object} domEvent A native DOM event object.
+ */
+CKEDITOR.dom.event = function( domEvent ) {
+	/**
+	 * The native DOM event object represented by this class instance.
+	 *
+	 * @readonly
+	 */
+	this.$ = domEvent;
+};
+
+CKEDITOR.dom.event.prototype = {
+	/**
+	 * Gets the key code associated to the event.
+	 *
+	 *		alert( event.getKey() ); // '65' is 'a' has been pressed
+	 *
+	 * @returns {Number} The key code.
+	 */
+	getKey: function() {
+		return this.$.keyCode || this.$.which;
+	},
+
+	/**
+	 * Gets a number represeting the combination of the keys pressed during the
+	 * event. It is the sum with the current key code and the {@link CKEDITOR#CTRL},
+	 * {@link CKEDITOR#SHIFT} and {@link CKEDITOR#ALT} constants.
+	 *
+	 *		alert( event.getKeystroke() == 65 );									// 'a' key
+	 *		alert( event.getKeystroke() == CKEDITOR.CTRL + 65 );					// CTRL + 'a' key
+	 *		alert( event.getKeystroke() == CKEDITOR.CTRL + CKEDITOR.SHIFT + 65 );	// CTRL + SHIFT + 'a' key
+	 *
+	 * @returns {Number} The number representing the keys combination.
+	 */
+	getKeystroke: function() {
+		var keystroke = this.getKey();
+
+		if ( this.$.ctrlKey || this.$.metaKey )
+			keystroke += CKEDITOR.CTRL;
+
+		if ( this.$.shiftKey )
+			keystroke += CKEDITOR.SHIFT;
+
+		if ( this.$.altKey )
+			keystroke += CKEDITOR.ALT;
+
+		return keystroke;
+	},
+
+	/**
+	 * Prevents the original behavior of the event to happen. It can optionally
+	 * stop propagating the event in the event chain.
+	 *
+	 *		var element = CKEDITOR.document.getById( 'myElement' );
+	 *		element.on( 'click', function( ev ) {
+	 *			// The DOM event object is passed by the 'data' property.
+	 *			var domEvent = ev.data;
+	 *			// Prevent the click to chave any effect in the element.
+	 *			domEvent.preventDefault();
+	 *		} );
+	 *
+	 * @param {Boolean} [stopPropagation=false] Stop propagating this event in the
+	 * event chain.
+	 */
+	preventDefault: function( stopPropagation ) {
+		var $ = this.$;
+		if ( $.preventDefault )
+			$.preventDefault();
+		else
+			$.returnValue = false;
+
+		if ( stopPropagation )
+			this.stopPropagation();
+	},
+
+	/**
+	 * Stops this event propagation in the event chain.
+	 */
+	stopPropagation: function() {
+		var $ = this.$;
+		if ( $.stopPropagation )
+			$.stopPropagation();
+		else
+			$.cancelBubble = true;
+	},
+
+	/**
+	 * Returns the DOM node where the event was targeted to.
+	 *
+	 *		var element = CKEDITOR.document.getById( 'myElement' );
+	 *		element.on( 'click', function( ev ) {
+	 *			// The DOM event object is passed by the 'data' property.
+	 *			var domEvent = ev.data;
+	 *			// Add a CSS class to the event target.
+	 *			domEvent.getTarget().addClass( 'clicked' );
+	 *		} );
+	 *
+	 * @returns {CKEDITOR.dom.node} The target DOM node.
+	 */
+	getTarget: function() {
+		var rawNode = this.$.target || this.$.srcElement;
+		return rawNode ? new CKEDITOR.dom.node( rawNode ) : null;
+	},
+
+	/**
+	 * Returns an integer value that indicates the current processing phase of an event.
+	 * For browsers that doesn't support event phase, {@link CKEDITOR#EVENT_PHASE_AT_TARGET} is always returned.
+	 *
+	 * @returns {Number} One of {@link CKEDITOR#EVENT_PHASE_CAPTURING},
+	 * {@link CKEDITOR#EVENT_PHASE_AT_TARGET}, or {@link CKEDITOR#EVENT_PHASE_BUBBLING}.
+	 */
+	getPhase: function() {
+		return this.$.eventPhase || 2;
+	},
+
+	/**
+	 * Retrieves the coordinates of the mouse pointer relative to the top-left
+	 * corner of the document, in mouse related event.
+	 *
+	 *		element.on( 'mousemouse', function( ev ) {
+	 *			var pageOffset = ev.data.getPageOffset();
+	 *			alert( pageOffset.x );			// page offset X
+	 *			alert( pageOffset.y );			// page offset Y
+	 *     } );
+	 *
+	 * @returns {Object} The object contains the position.
+	 * @returns {Number} return.x
+	 * @returns {Number} return.y
+	 */
+	getPageOffset: function() {
+		var doc = this.getTarget().getDocument().$;
+		var pageX = this.$.pageX || this.$.clientX + ( doc.documentElement.scrollLeft || doc.body.scrollLeft );
+		var pageY = this.$.pageY || this.$.clientY + ( doc.documentElement.scrollTop || doc.body.scrollTop );
+		return { x: pageX, y: pageY };
+	}
+};
+
+// For the followind constants, we need to go over the Unicode boundaries
+// (0x10FFFF) to avoid collision.
+
+/**
+ * CTRL key (0x110000).
+ *
+ * @readonly
+ * @property {Number} [=0x110000]
+ * @member CKEDITOR
+ */
+CKEDITOR.CTRL = 0x110000;
+
+/**
+ * SHIFT key (0x220000).
+ *
+ * @readonly
+ * @property {Number} [=0x220000]
+ * @member CKEDITOR
+ */
+CKEDITOR.SHIFT = 0x220000;
+
+/**
+ * ALT key (0x440000).
+ *
+ * @readonly
+ * @property {Number} [=0x440000]
+ * @member CKEDITOR
+ */
+CKEDITOR.ALT = 0x440000;
+
+/**
+ * Capturing phase.
+ *
+ * @readonly
+ * @property {Number} [=1]
+ * @member CKEDITOR
+ */
+CKEDITOR.EVENT_PHASE_CAPTURING = 1;
+
+/**
+ * Event at target.
+ *
+ * @readonly
+ * @property {Number} [=2]
+ * @member CKEDITOR
+ */
+CKEDITOR.EVENT_PHASE_AT_TARGET = 2;
+
+/**
+ * Bubbling phase.
+ *
+ * @readonly
+ * @property {Number} [=3]
+ * @member CKEDITOR
+ */
+CKEDITOR.EVENT_PHASE_BUBBLING = 3;

ckeditor/core/dom/iterator.js

@@ -0,0 +1,565 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @ignore
+ * File overview: DOM iterator which iterates over list items, lines and paragraphs.
+ */
+
+'use strict';
+
+( function() {
+	/**
+	 * Represents the iterator class. It can be used to iterate
+	 * over all elements (or even text nodes in case of {@link #enlargeBr} set to `false`)
+	 * which establish "paragraph-like" spaces within the passed range.
+	 *
+	 *		// <h1>[foo</h1><p>bar]</p>
+	 *		var iterator = range.createIterator();
+	 *		iterator.getNextParagraph(); // h1 element
+	 *		iterator.getNextParagraph(); // p element
+	 *
+	 *		// <ul><li>[foo</li><li>bar]</li>
+	 *		// With enforceRealBlocks set to false the iterator will return two list item elements.
+	 *		// With enforceRealBlocks set to true the iterator will return two paragraphs and the DOM will be changed to:
+	 *		// <ul><li><p>foo</p></li><li><p>bar</p></li>
+	 *
+	 * @class CKEDITOR.dom.iterator
+	 * @constructor Creates an iterator class instance.
+	 * @param {CKEDITOR.dom.range} range
+	 */
+	function iterator( range ) {
+		if ( arguments.length < 1 )
+			return;
+
+		/**
+		 * @readonly
+		 * @property {CKEDITOR.dom.range}
+		 */
+		this.range = range;
+
+		/**
+		 * @property {Boolean} [forceBrBreak=false]
+		 */
+		this.forceBrBreak = 0;
+
+		// (#3730).
+		/**
+		 * Whether to include `<br>` elements in the enlarged range. Should be
+		 * set to `false` when using the iterator in the {@link CKEDITOR#ENTER_BR} mode.
+		 *
+		 * @property {Boolean} [enlargeBr=true]
+		 */
+		this.enlargeBr = 1;
+
+		/**
+		 * Whether the iterator should create a transformable block
+		 * if the current one contains text and cannot be transformed.
+		 * For example new blocks will be established in elements like
+		 * `<li>` or `<td>`.
+		 *
+		 * @property {Boolean} [enforceRealBlocks=false]
+		 */
+		this.enforceRealBlocks = 0;
+
+		this._ || ( this._ = {} );
+	}
+
+	/**
+	 * Default iterator's filter. It is set only for nested iterators.
+	 *
+	 * @since 4.3
+	 * @readonly
+	 * @property {CKEDITOR.filter} filter
+	 */
+
+	/**
+	 * Iterator's active filter. It is set by the {@link #getNextParagraph} method
+	 * when it enters a nested editable.
+	 *
+	 * @since 4.3
+	 * @readonly
+	 * @property {CKEDITOR.filter} activeFilter
+	 */
+
+	var beginWhitespaceRegex = /^[\r\n\t ]+$/,
+		// Ignore bookmark nodes.(#3783)
+		bookmarkGuard = CKEDITOR.dom.walker.bookmark( false, true ),
+		whitespacesGuard = CKEDITOR.dom.walker.whitespaces( true ),
+		skipGuard = function( node ) {
+			return bookmarkGuard( node ) && whitespacesGuard( node );
+		},
+		listItemNames = { dd: 1, dt: 1, li: 1 };
+
+	iterator.prototype = {
+		/**
+		 * Returns the next paragraph-like element or `null` if the end of a range is reached.
+		 *
+		 * @param {String} [blockTag='p'] Name of a block element which will be established by
+		 * the iterator in block-less elements (see {@link #enforceRealBlocks}).
+		 */
+		getNextParagraph: function( blockTag ) {
+			// The block element to be returned.
+			var block;
+
+			// The range object used to identify the paragraph contents.
+			var range;
+
+			// Indicats that the current element in the loop is the last one.
+			var isLast;
+
+			// Instructs to cleanup remaining BRs.
+			var removePreviousBr, removeLastBr;
+
+			blockTag = blockTag || 'p';
+
+			// We're iterating over nested editable.
+			if ( this._.nestedEditable ) {
+				// Get next block from nested iterator and returns it if was found.
+				block = this._.nestedEditable.iterator.getNextParagraph( blockTag );
+				if ( block ) {
+					// Inherit activeFilter from the nested iterator.
+					this.activeFilter = this._.nestedEditable.iterator.activeFilter;
+					return block;
+				}
+
+				// No block in nested iterator means that we reached the end of the nested editable.
+				// Reset the active filter to the default filter (or undefined if this iterator didn't have it).
+				this.activeFilter = this.filter;
+
+				// Try to find next nested editable or get back to parent (this) iterator.
+				if ( startNestedEditableIterator( this, blockTag, this._.nestedEditable.container, this._.nestedEditable.remaining ) ) {
+					// Inherit activeFilter from the nested iterator.
+					this.activeFilter = this._.nestedEditable.iterator.activeFilter;
+					return this._.nestedEditable.iterator.getNextParagraph( blockTag );
+				} else {
+					this._.nestedEditable = null;
+				}
+			}
+
+			// Block-less range should be checked first.
+			if ( !this.range.root.getDtd()[ blockTag ] )
+				return null;
+
+			// This is the first iteration. Let's initialize it.
+			if ( !this._.started )
+				range = startIterator.call( this );
+
+			var currentNode = this._.nextNode,
+				lastNode = this._.lastNode;
+
+			this._.nextNode = null;
+			while ( currentNode ) {
+				// closeRange indicates that a paragraph boundary has been found,
+				// so the range can be closed.
+				var closeRange = 0,
+					parentPre = currentNode.hasAscendant( 'pre' );
+
+				// includeNode indicates that the current node is good to be part
+				// of the range. By default, any non-element node is ok for it.
+				var includeNode = ( currentNode.type != CKEDITOR.NODE_ELEMENT ),
+					continueFromSibling = 0;
+
+				// If it is an element node, let's check if it can be part of the range.
+				if ( !includeNode ) {
+					var nodeName = currentNode.getName();
+
+					// Non-editable block was found - return it and move to processing
+					// its nested editables if they exist.
+					if ( CKEDITOR.dtd.$block[ nodeName ] && currentNode.getAttribute( 'contenteditable' ) == 'false' ) {
+						block = currentNode;
+
+						// Setup iterator for first of nested editables.
+						// If there's no editable, then algorithm will move to next element after current block.
+						startNestedEditableIterator( this, blockTag, block );
+
+						// Gets us straight to the end of getParagraph() because block variable is set.
+						break;
+					} else if ( currentNode.isBlockBoundary( this.forceBrBreak && !parentPre && { br: 1 } ) ) {
+						// <br> boundaries must be part of the range. It will
+						// happen only if ForceBrBreak.
+						if ( nodeName == 'br' )
+							includeNode = 1;
+						else if ( !range && !currentNode.getChildCount() && nodeName != 'hr' ) {
+							// If we have found an empty block, and haven't started
+							// the range yet, it means we must return this block.
+							block = currentNode;
+							isLast = currentNode.equals( lastNode );
+							break;
+						}
+
+						// The range must finish right before the boundary,
+						// including possibly skipped empty spaces. (#1603)
+						if ( range ) {
+							range.setEndAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
+
+							// The found boundary must be set as the next one at this
+							// point. (#1717)
+							if ( nodeName != 'br' ) {
+								this._.nextNode = currentNode;
+							}
+						}
+
+						closeRange = 1;
+					} else {
+						// If we have child nodes, let's check them.
+						if ( currentNode.getFirst() ) {
+							// If we don't have a range yet, let's start it.
+							if ( !range ) {
+								range = this.range.clone();
+								range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
+							}
+
+							currentNode = currentNode.getFirst();
+							continue;
+						}
+						includeNode = 1;
+					}
+				} else if ( currentNode.type == CKEDITOR.NODE_TEXT ) {
+					// Ignore normal whitespaces (i.e. not including &nbsp; or
+					// other unicode whitespaces) before/after a block node.
+					if ( beginWhitespaceRegex.test( currentNode.getText() ) )
+						includeNode = 0;
+				}
+
+				// The current node is good to be part of the range and we are
+				// starting a new range, initialize it first.
+				if ( includeNode && !range ) {
+					range = this.range.clone();
+					range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
+				}
+
+				// The last node has been found.
+				isLast = ( ( !closeRange || includeNode ) && currentNode.equals( lastNode ) );
+
+				// If we are in an element boundary, let's check if it is time
+				// to close the range, otherwise we include the parent within it.
+				if ( range && !closeRange ) {
+					while ( !currentNode.getNext( skipGuard ) && !isLast ) {
+						var parentNode = currentNode.getParent();
+
+						if ( parentNode.isBlockBoundary( this.forceBrBreak && !parentPre && { br: 1 } ) ) {
+							closeRange = 1;
+							includeNode = 0;
+							isLast = isLast || ( parentNode.equals( lastNode ) );
+							// Make sure range includes bookmarks at the end of the block. (#7359)
+							range.setEndAt( parentNode, CKEDITOR.POSITION_BEFORE_END );
+							break;
+						}
+
+						currentNode = parentNode;
+						includeNode = 1;
+						isLast = ( currentNode.equals( lastNode ) );
+						continueFromSibling = 1;
+					}
+				}
+
+				// Now finally include the node.
+				if ( includeNode )
+					range.setEndAt( currentNode, CKEDITOR.POSITION_AFTER_END );
+
+				currentNode = this._getNextSourceNode( currentNode, continueFromSibling, lastNode );
+				isLast = !currentNode;
+
+				// We have found a block boundary. Let's close the range and move out of the
+				// loop.
+				if ( isLast || ( closeRange && range ) )
+					break;
+			}
+
+			// Now, based on the processed range, look for (or create) the block to be returned.
+			if ( !block ) {
+				// If no range has been found, this is the end.
+				if ( !range ) {
+					this._.docEndMarker && this._.docEndMarker.remove();
+					this._.nextNode = null;
+					return null;
+				}
+
+				var startPath = new CKEDITOR.dom.elementPath( range.startContainer, range.root );
+				var startBlockLimit = startPath.blockLimit,
+					checkLimits = { div: 1, th: 1, td: 1 };
+				block = startPath.block;
+
+				if ( !block && startBlockLimit && !this.enforceRealBlocks && checkLimits[ startBlockLimit.getName() ] &&
+					range.checkStartOfBlock() && range.checkEndOfBlock() && !startBlockLimit.equals( range.root ) ) {
+					block = startBlockLimit;
+				} else if ( !block || ( this.enforceRealBlocks && block.is( listItemNames ) ) ) {
+					// Create the fixed block.
+					block = this.range.document.createElement( blockTag );
+
+					// Move the contents of the temporary range to the fixed block.
+					range.extractContents().appendTo( block );
+					block.trim();
+
+					// Insert the fixed block into the DOM.
+					range.insertNode( block );
+
+					removePreviousBr = removeLastBr = true;
+				} else if ( block.getName() != 'li' ) {
+					// If the range doesn't includes the entire contents of the
+					// block, we must split it, isolating the range in a dedicated
+					// block.
+					if ( !range.checkStartOfBlock() || !range.checkEndOfBlock() ) {
+						// The resulting block will be a clone of the current one.
+						block = block.clone( false );
+
+						// Extract the range contents, moving it to the new block.
+						range.extractContents().appendTo( block );
+						block.trim();
+
+						// Split the block. At this point, the range will be in the
+						// right position for our intents.
+						var splitInfo = range.splitBlock();
+
+						removePreviousBr = !splitInfo.wasStartOfBlock;
+						removeLastBr = !splitInfo.wasEndOfBlock;
+
+						// Insert the new block into the DOM.
+						range.insertNode( block );
+					}
+				} else if ( !isLast ) {
+					// LIs are returned as is, with all their children (due to the
+					// nested lists). But, the next node is the node right after
+					// the current range, which could be an <li> child (nested
+					// lists) or the next sibling <li>.
+
+					this._.nextNode = ( block.equals( lastNode ) ? null : this._getNextSourceNode( range.getBoundaryNodes().endNode, 1, lastNode  ) );
+				}
+			}
+
+			if ( removePreviousBr ) {
+				var previousSibling = block.getPrevious();
+				if ( previousSibling && previousSibling.type == CKEDITOR.NODE_ELEMENT ) {
+					if ( previousSibling.getName() == 'br' )
+						previousSibling.remove();
+					else if ( previousSibling.getLast() && previousSibling.getLast().$.nodeName.toLowerCase() == 'br' )
+						previousSibling.getLast().remove();
+				}
+			}
+
+			if ( removeLastBr ) {
+				var lastChild = block.getLast();
+				if ( lastChild && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.getName() == 'br' ) {
+					// Remove br filler on browser which do not need it.
+					if ( !CKEDITOR.env.needsBrFiller || lastChild.getPrevious( bookmarkGuard ) || lastChild.getNext( bookmarkGuard ) )
+						lastChild.remove();
+				}
+			}
+
+			// Get a reference for the next element. This is important because the
+			// above block can be removed or changed, so we can rely on it for the
+			// next interation.
+			if ( !this._.nextNode ) {
+				this._.nextNode = ( isLast || block.equals( lastNode ) || !lastNode ) ? null : this._getNextSourceNode( block, 1, lastNode );
+			}
+
+			return block;
+		},
+
+		/**
+		 * Gets the next element to check or `null` when the `lastNode` or the
+		 * {@link #range}'s {@link CKEDITOR.dom.range#root root} is reached. Bookmarks are skipped.
+		 *
+		 * @since 4.4.6
+		 * @private
+		 * @param {CKEDITOR.dom.node} node
+		 * @param {Boolean} startFromSibling
+		 * @param {CKEDITOR.dom.node} lastNode
+		 * @returns {CKEDITOR.dom.node}
+		 */
+		_getNextSourceNode: function( node, startFromSibling, lastNode ) {
+			var rootNode = this.range.root,
+				next;
+
+			// Here we are checking in guard function whether current element
+			// reach lastNode(default behaviour) and root node to prevent against
+			// getting out of editor instance root DOM object.
+			// #12484
+			function guardFunction( node ) {
+				return !( node.equals( lastNode ) || node.equals( rootNode ) );
+			}
+
+			next = node.getNextSourceNode( startFromSibling, null, guardFunction );
+			while ( !bookmarkGuard( next ) ) {
+				next = next.getNextSourceNode( startFromSibling, null, guardFunction );
+			}
+			return next;
+		}
+	};
+
+	// @context CKEDITOR.dom.iterator
+	// @returns Collapsed range which will be reused when during furter processing.
+	function startIterator() {
+		var range = this.range.clone(),
+			// Indicate at least one of the range boundaries is inside a preformat block.
+			touchPre,
+
+			// (#12178)
+			// Remember if following situation takes place:
+			// * startAtInnerBoundary: <p>foo[</p>...
+			// * endAtInnerBoundary: ...<p>]bar</p>
+			// Because information about line break will be lost when shrinking range.
+			// Note that we test only if path block exist, because we must properly shrink
+			// range containing table and/or table cells.
+			// Note: When range is collapsed there's no way it can be shrinked.
+			// By checking if range is collapsed we also prevent #12308.
+			startPath = range.startPath(),
+			endPath = range.endPath(),
+			startAtInnerBoundary = !range.collapsed && rangeAtInnerBlockBoundary( range, startPath.block ),
+			endAtInnerBoundary = !range.collapsed && rangeAtInnerBlockBoundary( range, endPath.block, 1 );
+
+		// Shrink the range to exclude harmful "noises" (#4087, #4450, #5435).
+		range.shrink( CKEDITOR.SHRINK_ELEMENT, true );
+
+		if ( startAtInnerBoundary )
+			range.setStartAt( startPath.block, CKEDITOR.POSITION_BEFORE_END );
+		if ( endAtInnerBoundary )
+			range.setEndAt( endPath.block, CKEDITOR.POSITION_AFTER_START );
+
+		touchPre = range.endContainer.hasAscendant( 'pre', true ) || range.startContainer.hasAscendant( 'pre', true );
+
+		range.enlarge( this.forceBrBreak && !touchPre || !this.enlargeBr ? CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS : CKEDITOR.ENLARGE_BLOCK_CONTENTS );
+
+		if ( !range.collapsed ) {
+			var walker = new CKEDITOR.dom.walker( range.clone() ),
+				ignoreBookmarkTextEvaluator = CKEDITOR.dom.walker.bookmark( true, true );
+			// Avoid anchor inside bookmark inner text.
+			walker.evaluator = ignoreBookmarkTextEvaluator;
+			this._.nextNode = walker.next();
+			// TODO: It's better to have walker.reset() used here.
+			walker = new CKEDITOR.dom.walker( range.clone() );
+			walker.evaluator = ignoreBookmarkTextEvaluator;
+			var lastNode = walker.previous();
+			this._.lastNode = lastNode.getNextSourceNode( true, null, range.root );
+
+			// We may have an empty text node at the end of block due to [3770].
+			// If that node is the lastNode, it would cause our logic to leak to the
+			// next block.(#3887)
+			if ( this._.lastNode && this._.lastNode.type == CKEDITOR.NODE_TEXT && !CKEDITOR.tools.trim( this._.lastNode.getText() ) && this._.lastNode.getParent().isBlockBoundary() ) {
+				var testRange = this.range.clone();
+				testRange.moveToPosition( this._.lastNode, CKEDITOR.POSITION_AFTER_END );
+				if ( testRange.checkEndOfBlock() ) {
+					var path = new CKEDITOR.dom.elementPath( testRange.endContainer, testRange.root ),
+						lastBlock = path.block || path.blockLimit;
+					this._.lastNode = lastBlock.getNextSourceNode( true );
+				}
+			}
+
+			// The end of document or range.root was reached, so we need a marker node inside.
+			if ( !this._.lastNode || !range.root.contains( this._.lastNode ) ) {
+				this._.lastNode = this._.docEndMarker = range.document.createText( '' );
+				this._.lastNode.insertAfter( lastNode );
+			}
+
+			// Let's reuse this variable.
+			range = null;
+		}
+
+		this._.started = 1;
+
+		return range;
+	}
+
+	// Does a nested editables lookup inside editablesContainer.
+	// If remainingEditables is set will lookup inside this array.
+	// @param {CKEDITOR.dom.element} editablesContainer
+	// @param {CKEDITOR.dom.element[]} [remainingEditables]
+	function getNestedEditableIn( editablesContainer, remainingEditables ) {
+		if ( remainingEditables == null )
+			remainingEditables = findNestedEditables( editablesContainer );
+
+		var editable;
+
+		while ( ( editable = remainingEditables.shift() ) ) {
+			if ( isIterableEditable( editable ) )
+				return { element: editable, remaining: remainingEditables };
+		}
+
+		return null;
+	}
+
+	// Checkes whether we can iterate over this editable.
+	function isIterableEditable( editable ) {
+		// Reject blockless editables.
+		return editable.getDtd().p;
+	}
+
+	// Finds nested editables within container. Does not return
+	// editables nested in another editable (twice).
+	function findNestedEditables( container ) {
+		var editables = [];
+
+		container.forEach( function( element ) {
+			if ( element.getAttribute( 'contenteditable' ) == 'true' ) {
+				editables.push( element );
+				return false; // Skip children.
+			}
+		}, CKEDITOR.NODE_ELEMENT, true );
+
+		return editables;
+	}
+
+	// Looks for a first nested editable after previousEditable (if passed) and creates
+	// nested iterator for it.
+	function startNestedEditableIterator( parentIterator, blockTag, editablesContainer, remainingEditables ) {
+		var editable = getNestedEditableIn( editablesContainer, remainingEditables );
+
+		if ( !editable )
+			return 0;
+
+		var filter = CKEDITOR.filter.instances[ editable.element.data( 'cke-filter' ) ];
+
+		// If current editable has a filter and this filter does not allow for block tag,
+		// search for next nested editable in remaining ones.
+		if ( filter && !filter.check( blockTag ) )
+			return startNestedEditableIterator( parentIterator, blockTag, editablesContainer, editable.remaining );
+
+		var range = new CKEDITOR.dom.range( editable.element );
+		range.selectNodeContents( editable.element );
+
+		var iterator = range.createIterator();
+		// This setting actually does not change anything in this case,
+		// because entire range contents is selected, so there're no <br>s to be included.
+		// But it seems right to copy it too.
+		iterator.enlargeBr = parentIterator.enlargeBr;
+		// Inherit configuration from parent iterator.
+		iterator.enforceRealBlocks = parentIterator.enforceRealBlocks;
+		// Set the activeFilter (which can be overriden when this iteator will start nested iterator)
+		// and the default filter, which will make it possible to reset to
+		// current iterator's activeFilter after leaving nested editable.
+		iterator.activeFilter = iterator.filter = filter;
+
+		parentIterator._.nestedEditable = {
+			element: editable.element,
+			container: editablesContainer,
+			remaining: editable.remaining,
+			iterator: iterator
+		};
+
+		return 1;
+	}
+
+	// Checks whether range starts or ends at inner block boundary.
+	// See usage comments to learn more.
+	function rangeAtInnerBlockBoundary( range, block, checkEnd ) {
+		if ( !block )
+			return false;
+
+		var testRange = range.clone();
+		testRange.collapse( !checkEnd );
+		return testRange.checkBoundaryOfElement( block, checkEnd ? CKEDITOR.START : CKEDITOR.END );
+	}
+
+	/**
+	 * Creates a {@link CKEDITOR.dom.iterator} instance for this range.
+	 *
+	 * @member CKEDITOR.dom.range
+	 * @returns {CKEDITOR.dom.iterator}
+	 */
+	CKEDITOR.dom.range.prototype.createIterator = function() {
+		return new iterator( this );
+	};
+} )();

ckeditor/core/dom/node.js

@@ -0,0 +1,902 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.node} class which is the base
+ *		class for classes that represent DOM nodes.
+ */
+
+/**
+ * Base class for classes representing DOM nodes. This constructor may return
+ * an instance of a class that inherits from this class, like
+ * {@link CKEDITOR.dom.element} or {@link CKEDITOR.dom.text}.
+ *
+ * @class
+ * @extends CKEDITOR.dom.domObject
+ * @constructor Creates a node class instance.
+ * @param {Object} domNode A native DOM node.
+ * @see CKEDITOR.dom.element
+ * @see CKEDITOR.dom.text
+ */
+CKEDITOR.dom.node = function( domNode ) {
+	if ( domNode ) {
+		var type =
+			domNode.nodeType == CKEDITOR.NODE_DOCUMENT ? 'document' :
+			domNode.nodeType == CKEDITOR.NODE_ELEMENT ? 'element' :
+			domNode.nodeType == CKEDITOR.NODE_TEXT ? 'text' :
+			domNode.nodeType == CKEDITOR.NODE_COMMENT ? 'comment' :
+			domNode.nodeType == CKEDITOR.NODE_DOCUMENT_FRAGMENT ? 'documentFragment' :
+			'domObject'; // Call the base constructor otherwise.
+
+		return new CKEDITOR.dom[ type ]( domNode );
+	}
+
+	return this;
+};
+
+CKEDITOR.dom.node.prototype = new CKEDITOR.dom.domObject();
+
+/**
+ * Element node type.
+ *
+ * @readonly
+ * @property {Number} [=1]
+ * @member CKEDITOR
+ */
+CKEDITOR.NODE_ELEMENT = 1;
+
+/**
+ * Document node type.
+ *
+ * @readonly
+ * @property {Number} [=9]
+ * @member CKEDITOR
+ */
+CKEDITOR.NODE_DOCUMENT = 9;
+
+/**
+ * Text node type.
+ *
+ * @readonly
+ * @property {Number} [=3]
+ * @member CKEDITOR
+ */
+CKEDITOR.NODE_TEXT = 3;
+
+/**
+ * Comment node type.
+ *
+ * @readonly
+ * @property {Number} [=8]
+ * @member CKEDITOR
+ */
+CKEDITOR.NODE_COMMENT = 8;
+
+/**
+ * Document fragment node type.
+ *
+ * @readonly
+ * @property {Number} [=11]
+ * @member CKEDITOR
+ */
+CKEDITOR.NODE_DOCUMENT_FRAGMENT = 11;
+
+/**
+ * Indicates that positions of both nodes are identical (this is the same node). See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=0]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_IDENTICAL = 0;
+
+/**
+ * Indicates that nodes are in different (detached) trees. See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=1]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_DISCONNECTED = 1;
+
+/**
+ * Indicates that the context node follows the other node. See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=2]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_FOLLOWING = 2;
+
+/**
+ * Indicates that the context node precedes the other node. See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=4]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_PRECEDING = 4;
+
+/**
+ * Indicates that the context node is a descendant of the other node. See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=8]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_IS_CONTAINED = 8;
+
+/**
+ * Indicates that the context node contains the other node. See {@link CKEDITOR.dom.node#getPosition}.
+ *
+ * @readonly
+ * @property {Number} [=16]
+ * @member CKEDITOR
+ */
+CKEDITOR.POSITION_CONTAINS = 16;
+
+CKEDITOR.tools.extend( CKEDITOR.dom.node.prototype, {
+	/**
+	 * Makes this node a child of another element.
+	 *
+	 *		var p = new CKEDITOR.dom.element( 'p' );
+	 *		var strong = new CKEDITOR.dom.element( 'strong' );
+	 *		strong.appendTo( p );
+	 *
+	 *		// Result: '<p><strong></strong></p>'.
+	 *
+	 * @param {CKEDITOR.dom.element} element The target element to which this node will be appended.
+	 * @returns {CKEDITOR.dom.element} The target element.
+	 */
+	appendTo: function( element, toStart ) {
+		element.append( this, toStart );
+		return element;
+	},
+
+	/**
+	 * Clones this node.
+	 *
+	 * **Note**: Values set by {#setCustomData} will not be available in the clone.
+	 *
+	 * @param {Boolean} [includeChildren=false] If `true` then all node's
+	 * children will be cloned recursively.
+	 * @param {Boolean} [cloneId=false] Whether ID attributes should be cloned, too.
+	 * @returns {CKEDITOR.dom.node} Clone of this node.
+	 */
+	clone: function( includeChildren, cloneId ) {
+		var $clone = this.$.cloneNode( includeChildren );
+
+		// The "id" attribute should never be cloned to avoid duplication.
+		removeIds( $clone );
+
+		var node = new CKEDITOR.dom.node( $clone );
+
+		// On IE8 we need to fixed HTML5 node name, see details below.
+		if ( CKEDITOR.env.ie && CKEDITOR.env.version < 9 &&
+			( this.type == CKEDITOR.NODE_ELEMENT || this.type == CKEDITOR.NODE_DOCUMENT_FRAGMENT ) ) {
+			renameNodes( node );
+		}
+
+		return node;
+
+		function removeIds( node ) {
+			// Reset data-cke-expando only when has been cloned (IE and only for some types of objects).
+			if ( node[ 'data-cke-expando' ] )
+				node[ 'data-cke-expando' ] = false;
+
+			if ( node.nodeType != CKEDITOR.NODE_ELEMENT && node.nodeType != CKEDITOR.NODE_DOCUMENT_FRAGMENT  )
+				return;
+
+			if ( !cloneId && node.nodeType == CKEDITOR.NODE_ELEMENT )
+				node.removeAttribute( 'id', false );
+
+			if ( includeChildren ) {
+				var childs = node.childNodes;
+				for ( var i = 0; i < childs.length; i++ )
+					removeIds( childs[ i ] );
+			}
+		}
+
+		// IE8 rename HTML5 nodes by adding `:` at the begging of the tag name when the node is cloned,
+		// so `<figure>` will be `<:figure>` after 'cloneNode'. We need to fix it (#13101).
+		function renameNodes( node ) {
+			if ( node.type != CKEDITOR.NODE_ELEMENT && node.type != CKEDITOR.NODE_DOCUMENT_FRAGMENT )
+				return;
+
+			if ( node.type != CKEDITOR.NODE_DOCUMENT_FRAGMENT ) {
+				var name = node.getName();
+				if ( name[ 0 ] == ':' ) {
+					node.renameNode( name.substring( 1 ) );
+				}
+			}
+
+			if ( includeChildren ) {
+				for ( var i = 0; i < node.getChildCount(); i++ )
+					renameNodes( node.getChild( i ) );
+			}
+		}
+	},
+
+	/**
+	 * Checks if the node is preceded by any sibling.
+	 *
+	 * @returns {Boolean}
+	 */
+	hasPrevious: function() {
+		return !!this.$.previousSibling;
+	},
+
+	/**
+	 * Checks if the node is succeeded by any sibling.
+	 *
+	 * @returns {Boolean}
+	 */
+	hasNext: function() {
+		return !!this.$.nextSibling;
+	},
+
+	/**
+	 * Inserts this element after a node.
+	 *
+	 *		var em = new CKEDITOR.dom.element( 'em' );
+	 *		var strong = new CKEDITOR.dom.element( 'strong' );
+	 *		strong.insertAfter( em );
+	 *
+	 *		// Result: '<em></em><strong></strong>'
+	 *
+	 * @param {CKEDITOR.dom.node} node The node that will precede this element.
+	 * @returns {CKEDITOR.dom.node} The node preceding this one after insertion.
+	 */
+	insertAfter: function( node ) {
+		node.$.parentNode.insertBefore( this.$, node.$.nextSibling );
+		return node;
+	},
+
+	/**
+	 * Inserts this element before a node.
+	 *
+	 *		var em = new CKEDITOR.dom.element( 'em' );
+	 *		var strong = new CKEDITOR.dom.element( 'strong' );
+	 *		strong.insertBefore( em );
+	 *
+	 *		// result: '<strong></strong><em></em>'
+	 *
+	 * @param {CKEDITOR.dom.node} node The node that will succeed this element.
+	 * @returns {CKEDITOR.dom.node} The node being inserted.
+	 */
+	insertBefore: function( node ) {
+		node.$.parentNode.insertBefore( this.$, node.$ );
+		return node;
+	},
+
+	/**
+	 * Inserts a node before this node.
+	 *
+	 *		var em = new CKEDITOR.dom.element( 'em' );
+	 *		var strong = new CKEDITOR.dom.element( 'strong' );
+	 *		strong.insertBeforeMe( em );
+	 *
+	 *		// result: '<em></em><strong></strong>'
+	 *
+	 * @param {CKEDITOR.dom.node} node The node that will preceed this element.
+	 * @returns {CKEDITOR.dom.node} The node being inserted.
+	 */
+	insertBeforeMe: function( node ) {
+		this.$.parentNode.insertBefore( node.$, this.$ );
+		return node;
+	},
+
+	/**
+	 * Retrieves a uniquely identifiable tree address for this node.
+	 * The tree address returned is an array of integers, with each integer
+	 * indicating a child index of a DOM node, starting from
+	 * `document.documentElement`.
+	 *
+	 * For example, assuming `<body>` is the second child
+	 * of `<html>` (`<head>` being the first),
+	 * and we would like to address the third child under the
+	 * fourth child of `<body>`, the tree address returned would be:
+	 * `[1, 3, 2]`.
+	 *
+	 * The tree address cannot be used for finding back the DOM tree node once
+	 * the DOM tree structure has been modified.
+	 *
+	 * @param {Boolean} [normalized=false] See {@link #getIndex}.
+	 * @returns {Array} The address.
+	 */
+	getAddress: function( normalized ) {
+		var address = [];
+		var $documentElement = this.getDocument().$.documentElement;
+		var node = this.$;
+
+		while ( node && node != $documentElement ) {
+			var parentNode = node.parentNode;
+
+			if ( parentNode ) {
+				// Get the node index. For performance, call getIndex
+				// directly, instead of creating a new node object.
+				address.unshift( this.getIndex.call( { $: node }, normalized ) );
+			}
+
+			node = parentNode;
+		}
+
+		return address;
+	},
+
+	/**
+	 * Gets the document containing this element.
+	 *
+	 *		var element = CKEDITOR.document.getById( 'example' );
+	 *		alert( element.getDocument().equals( CKEDITOR.document ) ); // true
+	 *
+	 * @returns {CKEDITOR.dom.document} The document.
+	 */
+	getDocument: function() {
+		return new CKEDITOR.dom.document( this.$.ownerDocument || this.$.parentNode.ownerDocument );
+	},
+
+	/**
+	 * Gets the index of a node in an array of its `parent.childNodes`.
+	 * Returns `-1` if a node does not have a parent or when the `normalized` argument is set to `true`
+	 * and the text node is empty and will be removed during the normalization.
+	 *
+	 * Let us assume having the following `childNodes` array:
+	 *
+	 *		[ emptyText, element1, text, text, element2, emptyText2 ]
+	 *
+	 *		emptyText.getIndex()			// 0
+	 *		emptyText.getIndex( true )		// -1
+	 *		element1.getIndex();			// 1
+	 *		element1.getIndex( true );		// 0
+	 *		element2.getIndex();			// 4
+	 *		element2.getIndex( true );		// 2
+	 *		emptyText2.getIndex();			// 5
+	 *		emptyText2.getIndex( true );	// -1
+	 *
+	 * @param {Boolean} normalized When `true`, adjacent text nodes are merged and empty text nodes are removed.
+	 * @returns {Number} Index of a node or `-1` if a node does not have a parent or is removed during the normalization.
+	 */
+	getIndex: function( normalized ) {
+		// Attention: getAddress depends on this.$
+		// getIndex is called on a plain object: { $ : node }
+
+		var current = this.$,
+			index = -1,
+			isNormalizing;
+
+		if ( !this.$.parentNode )
+			return -1;
+
+		// The idea is - all empty text nodes will be virtually merged into their adjacent text nodes.
+		// If an empty text node does not have an adjacent non-empty text node we can return -1 straight away,
+		// because it and all its sibling text nodes will be merged into an empty text node and then totally ignored.
+		if ( normalized && current.nodeType == CKEDITOR.NODE_TEXT && isEmpty( current ) ) {
+			var adjacent = getAdjacentNonEmptyTextNode( current ) || getAdjacentNonEmptyTextNode( current, true );
+
+			if ( !adjacent )
+				return -1;
+		}
+
+		do {
+			// Bypass blank node and adjacent text nodes.
+			if ( normalized && current != this.$ && current.nodeType == CKEDITOR.NODE_TEXT && ( isNormalizing || isEmpty( current ) ) )
+				continue;
+
+			index++;
+			isNormalizing = current.nodeType == CKEDITOR.NODE_TEXT;
+		}
+		while ( ( current = current.previousSibling ) );
+
+		return index;
+
+		function getAdjacentNonEmptyTextNode( node, lookForward ) {
+			var sibling = lookForward ? node.nextSibling : node.previousSibling;
+
+			if ( !sibling || sibling.nodeType != CKEDITOR.NODE_TEXT ) {
+				return null;
+			}
+
+			// If found a non-empty text node, then return it.
+			// If not, then continue search.
+			return isEmpty( sibling ) ? getAdjacentNonEmptyTextNode( sibling, lookForward ) : sibling;
+		}
+
+		// Checks whether a text node is empty or is FCSeq string (which will be totally removed when normalizing).
+		function isEmpty( textNode ) {
+			return !textNode.nodeValue || textNode.nodeValue == CKEDITOR.dom.selection.FILLING_CHAR_SEQUENCE;
+		}
+	},
+
+	/**
+	 * @todo
+	 */
+	getNextSourceNode: function( startFromSibling, nodeType, guard ) {
+		// If "guard" is a node, transform it in a function.
+		if ( guard && !guard.call ) {
+			var guardNode = guard;
+			guard = function( node ) {
+				return !node.equals( guardNode );
+			};
+		}
+
+		var node = ( !startFromSibling && this.getFirst && this.getFirst() ),
+			parent;
+
+		// Guarding when we're skipping the current element( no children or 'startFromSibling' ).
+		// send the 'moving out' signal even we don't actually dive into.
+		if ( !node ) {
+			if ( this.type == CKEDITOR.NODE_ELEMENT && guard && guard( this, true ) === false )
+				return null;
+			node = this.getNext();
+		}
+
+		while ( !node && ( parent = ( parent || this ).getParent() ) ) {
+			// The guard check sends the "true" paramenter to indicate that
+			// we are moving "out" of the element.
+			if ( guard && guard( parent, true ) === false )
+				return null;
+
+			node = parent.getNext();
+		}
+
+		if ( !node )
+			return null;
+
+		if ( guard && guard( node ) === false )
+			return null;
+
+		if ( nodeType && nodeType != node.type )
+			return node.getNextSourceNode( false, nodeType, guard );
+
+		return node;
+	},
+
+	/**
+	 * @todo
+	 */
+	getPreviousSourceNode: function( startFromSibling, nodeType, guard ) {
+		if ( guard && !guard.call ) {
+			var guardNode = guard;
+			guard = function( node ) {
+				return !node.equals( guardNode );
+			};
+		}
+
+		var node = ( !startFromSibling && this.getLast && this.getLast() ),
+			parent;
+
+		// Guarding when we're skipping the current element( no children or 'startFromSibling' ).
+		// send the 'moving out' signal even we don't actually dive into.
+		if ( !node ) {
+			if ( this.type == CKEDITOR.NODE_ELEMENT && guard && guard( this, true ) === false )
+				return null;
+			node = this.getPrevious();
+		}
+
+		while ( !node && ( parent = ( parent || this ).getParent() ) ) {
+			// The guard check sends the "true" paramenter to indicate that
+			// we are moving "out" of the element.
+			if ( guard && guard( parent, true ) === false )
+				return null;
+
+			node = parent.getPrevious();
+		}
+
+		if ( !node )
+			return null;
+
+		if ( guard && guard( node ) === false )
+			return null;
+
+		if ( nodeType && node.type != nodeType )
+			return node.getPreviousSourceNode( false, nodeType, guard );
+
+		return node;
+	},
+
+	/**
+	 * Gets the node that preceeds this element in its parent's child list.
+	 *
+	 *		var element = CKEDITOR.dom.element.createFromHtml( '<div><i>prev</i><b>Example</b></div>' );
+	 *		var first = element.getLast().getPrev();
+	 *		alert( first.getName() ); // 'i'
+	 *
+	 * @param {Function} [evaluator] Filtering the result node.
+	 * @returns {CKEDITOR.dom.node} The previous node or null if not available.
+	 */
+	getPrevious: function( evaluator ) {
+		var previous = this.$,
+			retval;
+		do {
+			previous = previous.previousSibling;
+
+			// Avoid returning the doc type node.
+			// http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-412266927
+			retval = previous && previous.nodeType != 10 && new CKEDITOR.dom.node( previous );
+		}
+		while ( retval && evaluator && !evaluator( retval ) );
+		return retval;
+	},
+
+	/**
+	 * Gets the node that follows this element in its parent's child list.
+	 *
+	 *		var element = CKEDITOR.dom.element.createFromHtml( '<div><b>Example</b><i>next</i></div>' );
+	 *		var last = element.getFirst().getNext();
+	 *		alert( last.getName() ); // 'i'
+	 *
+	 * @param {Function} [evaluator] Filtering the result node.
+	 * @returns {CKEDITOR.dom.node} The next node or null if not available.
+	 */
+	getNext: function( evaluator ) {
+		var next = this.$,
+			retval;
+		do {
+			next = next.nextSibling;
+			retval = next && new CKEDITOR.dom.node( next );
+		}
+		while ( retval && evaluator && !evaluator( retval ) );
+		return retval;
+	},
+
+	/**
+	 * Gets the parent element for this node.
+	 *
+	 *		var node = editor.document.getBody().getFirst();
+	 *		var parent = node.getParent();
+	 *		alert( parent.getName() ); // 'body'
+	 *
+	 * @param {Boolean} [allowFragmentParent=false] Consider also parent node that is of
+	 * fragment type {@link CKEDITOR#NODE_DOCUMENT_FRAGMENT}.
+	 * @returns {CKEDITOR.dom.element} The parent element.
+	 */
+	getParent: function( allowFragmentParent ) {
+		var parent = this.$.parentNode;
+		return ( parent && ( parent.nodeType == CKEDITOR.NODE_ELEMENT || allowFragmentParent && parent.nodeType == CKEDITOR.NODE_DOCUMENT_FRAGMENT ) ) ? new CKEDITOR.dom.node( parent ) : null;
+	},
+
+	/**
+	 * Returns an array containing node parents and the node itself. By default nodes are in _descending_ order.
+	 *
+	 *		// Assuming that body has paragraph as the first child.
+	 *		var node = editor.document.getBody().getFirst();
+	 *		var parents = node.getParents();
+	 *		alert( parents[ 0 ].getName() + ',' + parents[ 2 ].getName() ); // 'html,p'
+	 *
+	 * @param {Boolean} [closerFirst=false] Determines the order of returned nodes.
+	 * @returns {Array} Returns an array of {@link CKEDITOR.dom.node}.
+	 */
+	getParents: function( closerFirst ) {
+		var node = this;
+		var parents = [];
+
+		do {
+			parents[ closerFirst ? 'push' : 'unshift' ]( node );
+		}
+		while ( ( node = node.getParent() ) );
+
+		return parents;
+	},
+
+	/**
+	 * @todo
+	 */
+	getCommonAncestor: function( node ) {
+		if ( node.equals( this ) )
+			return this;
+
+		if ( node.contains && node.contains( this ) )
+			return node;
+
+		var start = this.contains ? this : this.getParent();
+
+		do {
+			if ( start.contains( node ) ) return start;
+		}
+		while ( ( start = start.getParent() ) );
+
+		return null;
+	},
+
+	/**
+	 * Determines the position relation between this node and the given {@link CKEDITOR.dom.node} in the document.
+	 * This node can be preceding ({@link CKEDITOR#POSITION_PRECEDING}) or following ({@link CKEDITOR#POSITION_FOLLOWING})
+	 * the given node. This node can also contain ({@link CKEDITOR#POSITION_CONTAINS}) or be contained by
+	 * ({@link CKEDITOR#POSITION_IS_CONTAINED}) the given node. The function returns a bitmask of constants
+	 * listed above or {@link CKEDITOR#POSITION_IDENTICAL} if the given node is the same as this node.
+	 *
+	 * @param {CKEDITOR.dom.node} otherNode A node to check relation with.
+	 * @returns {Number} Position relation between this node and given node.
+	 */
+	getPosition: function( otherNode ) {
+		var $ = this.$;
+		var $other = otherNode.$;
+
+		if ( $.compareDocumentPosition )
+			return $.compareDocumentPosition( $other );
+
+		// IE and Safari have no support for compareDocumentPosition.
+
+		if ( $ == $other )
+			return CKEDITOR.POSITION_IDENTICAL;
+
+		// Only element nodes support contains and sourceIndex.
+		if ( this.type == CKEDITOR.NODE_ELEMENT && otherNode.type == CKEDITOR.NODE_ELEMENT ) {
+			if ( $.contains ) {
+				if ( $.contains( $other ) )
+					return CKEDITOR.POSITION_CONTAINS + CKEDITOR.POSITION_PRECEDING;
+
+				if ( $other.contains( $ ) )
+					return CKEDITOR.POSITION_IS_CONTAINED + CKEDITOR.POSITION_FOLLOWING;
+			}
+
+			if ( 'sourceIndex' in $ )
+				return ( $.sourceIndex < 0 || $other.sourceIndex < 0 ) ? CKEDITOR.POSITION_DISCONNECTED : ( $.sourceIndex < $other.sourceIndex ) ? CKEDITOR.POSITION_PRECEDING : CKEDITOR.POSITION_FOLLOWING;
+
+		}
+
+		// For nodes that don't support compareDocumentPosition, contains
+		// or sourceIndex, their "address" is compared.
+
+		var addressOfThis = this.getAddress(),
+			addressOfOther = otherNode.getAddress(),
+			minLevel = Math.min( addressOfThis.length, addressOfOther.length );
+
+		// Determinate preceding/following relationship.
+		for ( var i = 0; i < minLevel; i++ ) {
+			if ( addressOfThis[ i ] != addressOfOther[ i ] ) {
+				return addressOfThis[ i ] < addressOfOther[ i ] ? CKEDITOR.POSITION_PRECEDING : CKEDITOR.POSITION_FOLLOWING;
+			}
+		}
+
+		// Determinate contains/contained relationship.
+		return ( addressOfThis.length < addressOfOther.length ) ? CKEDITOR.POSITION_CONTAINS + CKEDITOR.POSITION_PRECEDING : CKEDITOR.POSITION_IS_CONTAINED + CKEDITOR.POSITION_FOLLOWING;
+	},
+
+	/**
+	 * Gets the closest ancestor node of this node, specified by its name or using an evaluator function.
+	 *
+	 *		// Suppose we have the following HTML structure:
+	 *		// <div id="outer"><div id="inner"><p><b>Some text</b></p></div></div>
+	 *		// If node == <b>
+	 *		ascendant = node.getAscendant( 'div' );				// ascendant == <div id="inner">
+	 *		ascendant = node.getAscendant( 'b' );				// ascendant == null
+	 *		ascendant = node.getAscendant( 'b', true );			// ascendant == <b>
+	 *		ascendant = node.getAscendant( { div:1, p:1 } );	// Searches for the first 'div' or 'p': ascendant == <div id="inner">
+	 *
+	 *		// Using custom evaluator:
+	 *		ascendant = node.getAscendant( function( el ) {
+	 *			return el.getId() == 'inner';
+	 *		} );
+	 *		// ascendant == <div id="inner">
+	 *
+	 * @since 3.6.1
+	 * @param {String/Function/Object} query The name of the ancestor node to search or
+	 * an object with the node names to search for or an evaluator function.
+	 * @param {Boolean} [includeSelf] Whether to include the current
+	 * node in the search.
+	 * @returns {CKEDITOR.dom.node} The located ancestor node or `null` if not found.
+	 */
+	getAscendant: function( query, includeSelf ) {
+		var $ = this.$,
+			evaluator,
+			isCustomEvaluator;
+
+		if ( !includeSelf ) {
+			$ = $.parentNode;
+		}
+
+		// Custom checker provided in an argument.
+		if ( typeof query == 'function' ) {
+			isCustomEvaluator = true;
+			evaluator = query;
+		} else {
+			// Predefined tag name checker.
+			isCustomEvaluator = false;
+			evaluator = function( $ ) {
+				var name = ( typeof $.nodeName == 'string' ? $.nodeName.toLowerCase() : '' );
+
+				return ( typeof query == 'string' ? name == query : name in query );
+			};
+		}
+
+		while ( $ ) {
+			// For user provided checker we use CKEDITOR.dom.node.
+			if ( evaluator( isCustomEvaluator ? new CKEDITOR.dom.node( $ ) : $ ) ) {
+				return new CKEDITOR.dom.node( $ );
+			}
+
+			try {
+				$ = $.parentNode;
+			} catch ( e ) {
+				$ = null;
+			}
+		}
+
+		return null;
+	},
+
+	/**
+	 * @todo
+	 */
+	hasAscendant: function( name, includeSelf ) {
+		var $ = this.$;
+
+		if ( !includeSelf )
+			$ = $.parentNode;
+
+		while ( $ ) {
+			if ( $.nodeName && $.nodeName.toLowerCase() == name )
+				return true;
+
+			$ = $.parentNode;
+		}
+		return false;
+	},
+
+	/**
+	 * @todo
+	 */
+	move: function( target, toStart ) {
+		target.append( this.remove(), toStart );
+	},
+
+	/**
+	 * Removes this node from the document DOM.
+	 *
+	 *		var element = CKEDITOR.document.getById( 'MyElement' );
+	 *		element.remove();
+	 *
+	 * @param {Boolean} [preserveChildren=false] Indicates that the children
+	 * elements must remain in the document, removing only the outer tags.
+	 */
+	remove: function( preserveChildren ) {
+		var $ = this.$;
+		var parent = $.parentNode;
+
+		if ( parent ) {
+			if ( preserveChildren ) {
+				// Move all children before the node.
+				for ( var child;
+				( child = $.firstChild ); ) {
+					parent.insertBefore( $.removeChild( child ), $ );
+				}
+			}
+
+			parent.removeChild( $ );
+		}
+
+		return this;
+	},
+
+	/**
+	 * @todo
+	 */
+	replace: function( nodeToReplace ) {
+		this.insertBefore( nodeToReplace );
+		nodeToReplace.remove();
+	},
+
+	/**
+	 * @todo
+	 */
+	trim: function() {
+		this.ltrim();
+		this.rtrim();
+	},
+
+	/**
+	 * @todo
+	 */
+	ltrim: function() {
+		var child;
+		while ( this.getFirst && ( child = this.getFirst() ) ) {
+			if ( child.type == CKEDITOR.NODE_TEXT ) {
+				var trimmed = CKEDITOR.tools.ltrim( child.getText() ),
+					originalLength = child.getLength();
+
+				if ( !trimmed ) {
+					child.remove();
+					continue;
+				} else if ( trimmed.length < originalLength ) {
+					child.split( originalLength - trimmed.length );
+
+					// IE BUG: child.remove() may raise JavaScript errors here. (#81)
+					this.$.removeChild( this.$.firstChild );
+				}
+			}
+			break;
+		}
+	},
+
+	/**
+	 * @todo
+	 */
+	rtrim: function() {
+		var child;
+		while ( this.getLast && ( child = this.getLast() ) ) {
+			if ( child.type == CKEDITOR.NODE_TEXT ) {
+				var trimmed = CKEDITOR.tools.rtrim( child.getText() ),
+					originalLength = child.getLength();
+
+				if ( !trimmed ) {
+					child.remove();
+					continue;
+				} else if ( trimmed.length < originalLength ) {
+					child.split( trimmed.length );
+
+					// IE BUG: child.getNext().remove() may raise JavaScript errors here.
+					// (#81)
+					this.$.lastChild.parentNode.removeChild( this.$.lastChild );
+				}
+			}
+			break;
+		}
+
+		if ( CKEDITOR.env.needsBrFiller ) {
+			child = this.$.lastChild;
+
+			if ( child && child.type == 1 && child.nodeName.toLowerCase() == 'br' ) {
+				// Use "eChildNode.parentNode" instead of "node" to avoid IE bug (#324).
+				child.parentNode.removeChild( child );
+			}
+		}
+	},
+
+	/**
+	 * Checks if this node is read-only (should not be changed).
+	 *
+	 *		// For the following HTML:
+	 *		// <b>foo</b><div contenteditable="false"><i>bar</i></div>
+	 *
+	 *		elB.isReadOnly(); // -> false
+	 *		foo.isReadOnly(); // -> false
+	 *		elDiv.isReadOnly(); // -> true
+	 *		elI.isReadOnly(); // -> true
+	 *
+	 * This method works in two modes depending on browser support for the `element.isContentEditable` property and
+	 * the value of the `checkOnlyAttributes` parameter. The `element.isContentEditable` check is faster, but it is known
+	 * to malfunction in hidden or detached nodes. Additionally, when processing some detached DOM tree you may want to imitate
+	 * that this happens inside an editable container (like it would happen inside the {@link CKEDITOR.editable}). To do so,
+	 * you can temporarily attach this tree to an element with the `data-cke-editable` attribute and use the
+	 * `checkOnlyAttributes` mode.
+	 *
+	 * @since 3.5
+	 * @param {Boolean} [checkOnlyAttributes=false] If `true`, only attributes will be checked, native methods will not
+	 * be used. This parameter needs to be `true` to check hidden or detached elements. Introduced in 4.5.
+	 * @returns {Boolean}
+	 */
+	isReadOnly: function( checkOnlyAttributes ) {
+		var element = this;
+		if ( this.type != CKEDITOR.NODE_ELEMENT )
+			element = this.getParent();
+
+		// Prevent Edge crash (#13609, #13919).
+		if ( CKEDITOR.env.edge && element && element.is( 'textarea', 'input' ) ) {
+			checkOnlyAttributes = true;
+		}
+
+		if ( !checkOnlyAttributes && element && typeof element.$.isContentEditable != 'undefined' ) {
+			return !( element.$.isContentEditable || element.data( 'cke-editable' ) );
+		}
+		else {
+			// Degrade for old browsers which don't support "isContentEditable", e.g. FF3
+
+			while ( element ) {
+				if ( element.data( 'cke-editable' ) ) {
+					return false;
+				} else if ( element.hasAttribute( 'contenteditable' ) ) {
+					return element.getAttribute( 'contenteditable' ) == 'false';
+				}
+
+				element = element.getParent();
+			}
+
+			// Reached the root of DOM tree, no editable found.
+			return true;
+		}
+	}
+} );

ckeditor/core/dom/nodelist.js

@@ -0,0 +1,43 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * Represents a list of {@link CKEDITOR.dom.node} objects.
+ * It's a wrapper for native nodes list.
+ *
+ *		var nodeList = CKEDITOR.document.getBody().getChildren();
+ *		alert( nodeList.count() ); // number [0;N]
+ *
+ * @class
+ * @constructor Creates a document class instance.
+ * @param {Object} nativeList
+ */
+CKEDITOR.dom.nodeList = function( nativeList ) {
+	this.$ = nativeList;
+};
+
+CKEDITOR.dom.nodeList.prototype = {
+	/**
+	 * Get count of nodes in this list.
+	 *
+	 * @returns {Number}
+	 */
+	count: function() {
+		return this.$.length;
+	},
+
+	/**
+	 * Get node from the list.
+	 *
+	 * @returns {CKEDITOR.dom.node}
+	 */
+	getItem: function( index ) {
+		if ( index < 0 || index >= this.$.length )
+			return null;
+
+		var $node = this.$[ index ];
+		return $node ? new CKEDITOR.dom.node( $node ) : null;
+	}
+};

ckeditor/core/dom/rangelist.js

@@ -0,0 +1,199 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+( function() {
+	/**
+	 * Represents a list os CKEDITOR.dom.range objects, which can be easily
+	 * iterated sequentially.
+	 *
+	 * @class
+	 * @extends Array
+	 * @constructor Creates a rangeList class instance.
+	 * @param {CKEDITOR.dom.range/CKEDITOR.dom.range[]} [ranges] The ranges contained on this list.
+	 * Note that, if an array of ranges is specified, the range sequence
+	 * should match its DOM order. This class will not help to sort them.
+	 */
+	CKEDITOR.dom.rangeList = function( ranges ) {
+		if ( ranges instanceof CKEDITOR.dom.rangeList )
+			return ranges;
+
+		if ( !ranges )
+			ranges = [];
+		else if ( ranges instanceof CKEDITOR.dom.range )
+			ranges = [ ranges ];
+
+		return CKEDITOR.tools.extend( ranges, mixins );
+	};
+
+	var mixins = {
+		/**
+		 * Creates an instance of the rangeList iterator, it should be used
+		 * only when the ranges processing could be DOM intrusive, which
+		 * means it may pollute and break other ranges in this list.
+		 * Otherwise, it's enough to just iterate over this array in a for loop.
+		 *
+		 * @returns {CKEDITOR.dom.rangeListIterator}
+		 */
+		createIterator: function() {
+			var rangeList = this,
+				bookmark = CKEDITOR.dom.walker.bookmark(),
+				bookmarks = [],
+				current;
+
+			return {
+				/**
+				 * Retrieves the next range in the list.
+				 *
+				 * @member CKEDITOR.dom.rangeListIterator
+				 * @param {Boolean} [mergeConsequent=false] Whether join two adjacent
+				 * ranges into single, e.g. consequent table cells.
+				 */
+				getNextRange: function( mergeConsequent ) {
+					current = current === undefined ? 0 : current + 1;
+
+					var range = rangeList[ current ];
+
+					// Multiple ranges might be mangled by each other.
+					if ( range && rangeList.length > 1 ) {
+						// Bookmarking all other ranges on the first iteration,
+						// the range correctness after it doesn't matter since we'll
+						// restore them before the next iteration.
+						if ( !current ) {
+							// Make sure bookmark correctness by reverse processing.
+							for ( var i = rangeList.length - 1; i >= 0; i-- )
+								bookmarks.unshift( rangeList[ i ].createBookmark( true ) );
+						}
+
+						if ( mergeConsequent ) {
+							// Figure out how many ranges should be merged.
+							var mergeCount = 0;
+							while ( rangeList[ current + mergeCount + 1 ] ) {
+								var doc = range.document,
+									found = 0,
+									left = doc.getById( bookmarks[ mergeCount ].endNode ),
+									right = doc.getById( bookmarks[ mergeCount + 1 ].startNode ),
+									next;
+
+								// Check subsequent range.
+								while ( 1 ) {
+									next = left.getNextSourceNode( false );
+									if ( !right.equals( next ) ) {
+										// This could be yet another bookmark or
+										// walking across block boundaries.
+										if ( bookmark( next ) || ( next.type == CKEDITOR.NODE_ELEMENT && next.isBlockBoundary() ) ) {
+											left = next;
+											continue;
+										}
+									} else {
+										found = 1;
+									}
+
+									break;
+								}
+
+								if ( !found )
+									break;
+
+								mergeCount++;
+							}
+						}
+
+						range.moveToBookmark( bookmarks.shift() );
+
+						// Merge ranges finally after moving to bookmarks.
+						while ( mergeCount-- ) {
+							next = rangeList[ ++current ];
+							next.moveToBookmark( bookmarks.shift() );
+							range.setEnd( next.endContainer, next.endOffset );
+						}
+					}
+
+					return range;
+				}
+			};
+		},
+
+		/**
+		 * Create bookmarks for all ranges. See {@link CKEDITOR.dom.range#createBookmark}.
+		 *
+		 * @param {Boolean} [serializable=false] See {@link CKEDITOR.dom.range#createBookmark}.
+		 * @returns {Array} Array of bookmarks.
+		 */
+		createBookmarks: function( serializable ) {
+			var retval = [],
+				bookmark;
+			for ( var i = 0; i < this.length; i++ ) {
+				retval.push( bookmark = this[ i ].createBookmark( serializable, true ) );
+
+				// Updating the container & offset values for ranges
+				// that have been touched.
+				for ( var j = i + 1; j < this.length; j++ ) {
+					this[ j ] = updateDirtyRange( bookmark, this[ j ] );
+					this[ j ] = updateDirtyRange( bookmark, this[ j ], true );
+				}
+			}
+			return retval;
+		},
+
+		/**
+		 * Create "unobtrusive" bookmarks for all ranges. See {@link CKEDITOR.dom.range#createBookmark2}.
+		 *
+		 * @param {Boolean} [normalized=false] See {@link CKEDITOR.dom.range#createBookmark2}.
+		 * @returns {Array} Array of bookmarks.
+		 */
+		createBookmarks2: function( normalized ) {
+			var bookmarks = [];
+
+			for ( var i = 0; i < this.length; i++ )
+				bookmarks.push( this[ i ].createBookmark2( normalized ) );
+
+			return bookmarks;
+		},
+
+		/**
+		 * Move each range in the list to the position specified by a list of bookmarks.
+		 *
+		 * @param {Array} bookmarks The list of bookmarks, each one matching a range in the list.
+		 */
+		moveToBookmarks: function( bookmarks ) {
+			for ( var i = 0; i < this.length; i++ )
+				this[ i ].moveToBookmark( bookmarks[ i ] );
+		}
+	};
+
+	// Update the specified range which has been mangled by previous insertion of
+	// range bookmark nodes.(#3256)
+	function updateDirtyRange( bookmark, dirtyRange, checkEnd ) {
+		var serializable = bookmark.serializable,
+			container = dirtyRange[ checkEnd ? 'endContainer' : 'startContainer' ],
+			offset = checkEnd ? 'endOffset' : 'startOffset';
+
+		var bookmarkStart = serializable ? dirtyRange.document.getById( bookmark.startNode ) : bookmark.startNode;
+
+		var bookmarkEnd = serializable ? dirtyRange.document.getById( bookmark.endNode ) : bookmark.endNode;
+
+		if ( container.equals( bookmarkStart.getPrevious() ) ) {
+			dirtyRange.startOffset = dirtyRange.startOffset - container.getLength() - bookmarkEnd.getPrevious().getLength();
+			container = bookmarkEnd.getNext();
+		} else if ( container.equals( bookmarkEnd.getPrevious() ) ) {
+			dirtyRange.startOffset = dirtyRange.startOffset - container.getLength();
+			container = bookmarkEnd.getNext();
+		}
+
+		container.equals( bookmarkStart.getParent() ) && dirtyRange[ offset ]++;
+		container.equals( bookmarkEnd.getParent() ) && dirtyRange[ offset ]++;
+
+		// Update and return this range.
+		dirtyRange[ checkEnd ? 'endContainer' : 'startContainer' ] = container;
+		return dirtyRange;
+	}
+} )();
+
+/**
+ * (Virtual Class) Do not call this constructor. This class is not really part
+ * of the API. It just describes the return type of {@link CKEDITOR.dom.rangeList#createIterator}.
+ *
+ * @class CKEDITOR.dom.rangeListIterator
+ */

ckeditor/core/dom/text.js

@@ -0,0 +1,135 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.text} class, which represents
+ *		a DOM text node.
+ */
+
+/**
+ * Represents a DOM text node.
+ *
+ *		var nativeNode = document.createTextNode( 'Example' );
+ *		var text = new CKEDITOR.dom.text( nativeNode );
+ *
+ *		var text = new CKEDITOR.dom.text( 'Example' );
+ *
+ * @class
+ * @extends CKEDITOR.dom.node
+ * @constructor Creates a text class instance.
+ * @param {Object/String} text A native DOM text node or a string containing
+ * the text to use to create a new text node.
+ * @param {CKEDITOR.dom.document} [ownerDocument] The document that will contain
+ * the node in case of new node creation. Defaults to the current document.
+ */
+CKEDITOR.dom.text = function( text, ownerDocument ) {
+	if ( typeof text == 'string' )
+		text = ( ownerDocument ? ownerDocument.$ : document ).createTextNode( text );
+
+	// Theoretically, we should call the base constructor here
+	// (not CKEDITOR.dom.node though). But, IE doesn't support expando
+	// properties on text node, so the features provided by domObject will not
+	// work for text nodes (which is not a big issue for us).
+	//
+	// CKEDITOR.dom.domObject.call( this, element );
+
+	this.$ = text;
+};
+
+CKEDITOR.dom.text.prototype = new CKEDITOR.dom.node();
+
+CKEDITOR.tools.extend( CKEDITOR.dom.text.prototype, {
+	/**
+	 * The node type. This is a constant value set to {@link CKEDITOR#NODE_TEXT}.
+	 *
+	 * @readonly
+	 * @property {Number} [=CKEDITOR.NODE_TEXT]
+	 */
+	type: CKEDITOR.NODE_TEXT,
+
+	/**
+	 * Gets length of node's value.
+	 *
+	 * @returns {Number}
+	 */
+	getLength: function() {
+		return this.$.nodeValue.length;
+	},
+
+	/**
+	 * Gets node's value.
+	 *
+	 * @returns {String}
+	 */
+	getText: function() {
+		return this.$.nodeValue;
+	},
+
+	/**
+	 * Sets node's value.
+	 *
+	 * @param {String} text
+	 */
+	setText: function( text ) {
+		this.$.nodeValue = text;
+	},
+
+	/**
+	 * Breaks this text node into two nodes at the specified offset,
+	 * keeping both in the tree as siblings. This node then only contains
+	 * all the content up to the offset point. A new text node, which is
+	 * inserted as the next sibling of this node, contains all the content
+	 * at and after the offset point. When the offset is equal to the
+	 * length of this node, the new node has no data.
+	 *
+	 * @param {Number} The position at which to split, starting from zero.
+	 * @returns {CKEDITOR.dom.text} The new text node.
+	 */
+	split: function( offset ) {
+
+		// Saved the children count and text length beforehand.
+		var parent = this.$.parentNode,
+			count = parent.childNodes.length,
+			length = this.getLength();
+
+		var doc = this.getDocument();
+		var retval = new CKEDITOR.dom.text( this.$.splitText( offset ), doc );
+
+		if ( parent.childNodes.length == count ) {
+			// If the offset is after the last char, IE creates the text node
+			// on split, but don't include it into the DOM. So, we have to do
+			// that manually here.
+			if ( offset >= length ) {
+				retval = doc.createText( '' );
+				retval.insertAfter( this );
+			} else {
+				// IE BUG: IE8+ does not update the childNodes array in DOM after splitText(),
+				// we need to make some DOM changes to make it update. (#3436)
+				var workaround = doc.createText( '' );
+				workaround.insertAfter( retval );
+				workaround.remove();
+			}
+		}
+
+		return retval;
+	},
+
+	/**
+	 * Extracts characters from indexA up to but not including `indexB`.
+	 *
+	 * @param {Number} indexA An integer between `0` and one less than the
+	 * length of the text.
+	 * @param {Number} [indexB] An integer between `0` and the length of the
+	 * string. If omitted, extracts characters to the end of the text.
+	 */
+	substring: function( indexA, indexB ) {
+		// We need the following check due to a Firefox bug
+		// https://bugzilla.mozilla.org/show_bug.cgi?id=458886
+		if ( typeof indexB != 'number' )
+			return this.$.nodeValue.substr( indexA );
+		else
+			return this.$.nodeValue.substring( indexA, indexB );
+	}
+} );

ckeditor/core/dom/walker.js

@@ -0,0 +1,652 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+( function() {
+	// This function is to be called under a "walker" instance scope.
+	function iterate( rtl, breakOnFalse ) {
+		var range = this.range;
+
+		// Return null if we have reached the end.
+		if ( this._.end )
+			return null;
+
+		// This is the first call. Initialize it.
+		if ( !this._.start ) {
+			this._.start = 1;
+
+			// A collapsed range must return null at first call.
+			if ( range.collapsed ) {
+				this.end();
+				return null;
+			}
+
+			// Move outside of text node edges.
+			range.optimize();
+		}
+
+		var node,
+			startCt = range.startContainer,
+			endCt = range.endContainer,
+			startOffset = range.startOffset,
+			endOffset = range.endOffset,
+			guard,
+			userGuard = this.guard,
+			type = this.type,
+			getSourceNodeFn = ( rtl ? 'getPreviousSourceNode' : 'getNextSourceNode' );
+
+		// Create the LTR guard function, if necessary.
+		if ( !rtl && !this._.guardLTR ) {
+			// The node that stops walker from moving up.
+			var limitLTR = endCt.type == CKEDITOR.NODE_ELEMENT ? endCt : endCt.getParent();
+
+			// The node that stops the walker from going to next.
+			var blockerLTR = endCt.type == CKEDITOR.NODE_ELEMENT ? endCt.getChild( endOffset ) : endCt.getNext();
+
+			this._.guardLTR = function( node, movingOut ) {
+				return ( ( !movingOut || !limitLTR.equals( node ) ) && ( !blockerLTR || !node.equals( blockerLTR ) ) && ( node.type != CKEDITOR.NODE_ELEMENT || !movingOut || !node.equals( range.root ) ) );
+			};
+		}
+
+		// Create the RTL guard function, if necessary.
+		if ( rtl && !this._.guardRTL ) {
+			// The node that stops walker from moving up.
+			var limitRTL = startCt.type == CKEDITOR.NODE_ELEMENT ? startCt : startCt.getParent();
+
+			// The node that stops the walker from going to next.
+			var blockerRTL = startCt.type == CKEDITOR.NODE_ELEMENT ? startOffset ? startCt.getChild( startOffset - 1 ) : null : startCt.getPrevious();
+
+			this._.guardRTL = function( node, movingOut ) {
+				return ( ( !movingOut || !limitRTL.equals( node ) ) && ( !blockerRTL || !node.equals( blockerRTL ) ) && ( node.type != CKEDITOR.NODE_ELEMENT || !movingOut || !node.equals( range.root ) ) );
+			};
+		}
+
+		// Define which guard function to use.
+		var stopGuard = rtl ? this._.guardRTL : this._.guardLTR;
+
+		// Make the user defined guard function participate in the process,
+		// otherwise simply use the boundary guard.
+		if ( userGuard ) {
+			guard = function( node, movingOut ) {
+				if ( stopGuard( node, movingOut ) === false )
+					return false;
+
+				return userGuard( node, movingOut );
+			};
+		} else {
+			guard = stopGuard;
+		}
+
+		if ( this.current )
+			node = this.current[ getSourceNodeFn ]( false, type, guard );
+		else {
+			// Get the first node to be returned.
+			if ( rtl ) {
+				node = endCt;
+
+				if ( node.type == CKEDITOR.NODE_ELEMENT ) {
+					if ( endOffset > 0 )
+						node = node.getChild( endOffset - 1 );
+					else
+						node = ( guard( node, true ) === false ) ? null : node.getPreviousSourceNode( true, type, guard );
+				}
+			} else {
+				node = startCt;
+
+				if ( node.type == CKEDITOR.NODE_ELEMENT ) {
+					if ( !( node = node.getChild( startOffset ) ) )
+						node = ( guard( startCt, true ) === false ) ? null : startCt.getNextSourceNode( true, type, guard );
+				}
+			}
+
+			if ( node && guard( node ) === false )
+				node = null;
+		}
+
+		while ( node && !this._.end ) {
+			this.current = node;
+
+			if ( !this.evaluator || this.evaluator( node ) !== false ) {
+				if ( !breakOnFalse )
+					return node;
+			} else if ( breakOnFalse && this.evaluator ) {
+				return false;
+			}
+
+			node = node[ getSourceNodeFn ]( false, type, guard );
+		}
+
+		this.end();
+		return this.current = null;
+	}
+
+	function iterateToLast( rtl ) {
+		var node,
+			last = null;
+
+		while ( ( node = iterate.call( this, rtl ) ) )
+			last = node;
+
+		return last;
+	}
+
+	/**
+	 * Utility class to "walk" the DOM inside range boundaries. If the
+	 * range starts or ends in the middle of the text node, this node will
+	 * be included as a whole. Outside changes to the range may break the walker.
+	 *
+	 * The walker may return nodes that are not totally included in the
+	 * range boundaries. Let us take the following range representation,
+	 * where the square brackets indicate the boundaries:
+	 *
+	 *		[<p>Some <b>sample] text</b>
+	 *
+	 * While walking forward into the above range, the following nodes are
+	 * returned: `<p>`, `"Some "`, `<b>` and `"sample"`. Going
+	 * backwards instead we have: `"sample"` and `"Some "`. So note that the
+	 * walker always returns nodes when "entering" them, but not when
+	 * "leaving" them. The {@link #guard} function is instead called both when
+	 * entering and when leaving nodes.
+	 *
+	 * @class
+	 */
+	CKEDITOR.dom.walker = CKEDITOR.tools.createClass( {
+		/**
+		 * Creates a walker class instance.
+		 *
+		 * @constructor
+		 * @param {CKEDITOR.dom.range} range The range within which to walk.
+		 */
+		$: function( range ) {
+			this.range = range;
+
+			/**
+			 * A function executed for every matched node to check whether
+			 * it is to be considered in the walk or not. If not provided, all
+			 * matched nodes are considered good.
+			 *
+			 * If the function returns `false`, the node is ignored.
+			 *
+			 * @property {Function} evaluator
+			 */
+			// this.evaluator = null;
+
+			/**
+			 * A function executed for every node the walk passes by to check
+			 * whether the walk is to be finished. It is called both when
+			 * entering and when exiting nodes, as well as for the matched nodes.
+			 *
+			 * If this function returns `false`, the walking ends and no more
+			 * nodes are evaluated.
+
+			 * @property {Function} guard
+			 */
+			// this.guard = null;
+
+			/** @private */
+			this._ = {};
+		},
+
+		//		statics :
+		//		{
+		//			/* Creates a CKEDITOR.dom.walker instance to walk inside DOM boundaries set by nodes.
+		//			 * @param {CKEDITOR.dom.node} startNode The node from which the walk
+		//			 *		will start.
+		//			 * @param {CKEDITOR.dom.node} [endNode] The last node to be considered
+		//			 *		in the walk. No more nodes are retrieved after touching or
+		//			 *		passing it. If not provided, the walker stops at the
+		//			 *		&lt;body&gt; closing boundary.
+		//			 * @returns {CKEDITOR.dom.walker} A DOM walker for the nodes between the
+		//			 *		provided nodes.
+		//			 */
+		//			createOnNodes : function( startNode, endNode, startInclusive, endInclusive )
+		//			{
+		//				var range = new CKEDITOR.dom.range();
+		//				if ( startNode )
+		//					range.setStartAt( startNode, startInclusive ? CKEDITOR.POSITION_BEFORE_START : CKEDITOR.POSITION_AFTER_END ) ;
+		//				else
+		//					range.setStartAt( startNode.getDocument().getBody(), CKEDITOR.POSITION_AFTER_START ) ;
+		//
+		//				if ( endNode )
+		//					range.setEndAt( endNode, endInclusive ? CKEDITOR.POSITION_AFTER_END : CKEDITOR.POSITION_BEFORE_START ) ;
+		//				else
+		//					range.setEndAt( startNode.getDocument().getBody(), CKEDITOR.POSITION_BEFORE_END ) ;
+		//
+		//				return new CKEDITOR.dom.walker( range );
+		//			}
+		//		},
+		//
+		proto: {
+			/**
+			 * Stops walking. No more nodes are retrieved if this function is called.
+			 */
+			end: function() {
+				this._.end = 1;
+			},
+
+			/**
+			 * Retrieves the next node (on the right).
+			 *
+			 * @returns {CKEDITOR.dom.node} The next node or `null` if no more
+			 * nodes are available.
+			 */
+			next: function() {
+				return iterate.call( this );
+			},
+
+			/**
+			 * Retrieves the previous node (on the left).
+			 *
+			 * @returns {CKEDITOR.dom.node} The previous node or `null` if no more
+			 * nodes are available.
+			 */
+			previous: function() {
+				return iterate.call( this, 1 );
+			},
+
+			/**
+			 * Checks all nodes on the right, executing the evaluation function.
+			 *
+			 * @returns {Boolean} `false` if the evaluator function returned
+			 * `false` for any of the matched nodes. Otherwise `true`.
+			 */
+			checkForward: function() {
+				return iterate.call( this, 0, 1 ) !== false;
+			},
+
+			/**
+			 * Check all nodes on the left, executing the evaluation function.
+			 *
+			 * @returns {Boolean} `false` if the evaluator function returned
+			 * `false` for any of the matched nodes. Otherwise `true`.
+			 */
+			checkBackward: function() {
+				return iterate.call( this, 1, 1 ) !== false;
+			},
+
+			/**
+			 * Executes a full walk forward (to the right), until no more nodes
+			 * are available, returning the last valid node.
+			 *
+			 * @returns {CKEDITOR.dom.node} The last node on the right or `null`
+			 * if no valid nodes are available.
+			 */
+			lastForward: function() {
+				return iterateToLast.call( this );
+			},
+
+			/**
+			 * Executes a full walk backwards (to the left), until no more nodes
+			 * are available, returning the last valid node.
+			 *
+			 * @returns {CKEDITOR.dom.node} The last node on the left or `null`
+			 * if no valid nodes are available.
+			 */
+			lastBackward: function() {
+				return iterateToLast.call( this, 1 );
+			},
+
+			/**
+			 * Resets the walker.
+			 */
+			reset: function() {
+				delete this.current;
+				this._ = {};
+			}
+
+		}
+	} );
+
+	// Anything whose display computed style is block, list-item, table,
+	// table-row-group, table-header-group, table-footer-group, table-row,
+	// table-column-group, table-column, table-cell, table-caption, or whose node
+	// name is hr, br (when enterMode is br only) is a block boundary.
+	var blockBoundaryDisplayMatch = {
+			block: 1, 'list-item': 1, table: 1, 'table-row-group': 1,
+			'table-header-group': 1, 'table-footer-group': 1, 'table-row': 1, 'table-column-group': 1,
+			'table-column': 1, 'table-cell': 1, 'table-caption': 1
+		},
+		outOfFlowPositions = { absolute: 1, fixed: 1 };
+
+	/**
+	 * Checks whether an element is displayed as a block.
+	 *
+	 * @member CKEDITOR.dom.element
+	 * @param [customNodeNames] Custom list of nodes which will extend
+	 * the default {@link CKEDITOR.dtd#$block} list.
+	 * @returns {Boolean}
+	 */
+	CKEDITOR.dom.element.prototype.isBlockBoundary = function( customNodeNames ) {
+		// Whether element is in normal page flow. Floated or positioned elements are out of page flow.
+		// Don't consider floated or positioned formatting as block boundary, fall back to dtd check in that case. (#6297)
+		var inPageFlow = this.getComputedStyle( 'float' ) == 'none' && !( this.getComputedStyle( 'position' ) in outOfFlowPositions );
+
+		if ( inPageFlow && blockBoundaryDisplayMatch[ this.getComputedStyle( 'display' ) ] )
+			return true;
+
+		// Either in $block or in customNodeNames if defined.
+		return !!( this.is( CKEDITOR.dtd.$block ) || customNodeNames && this.is( customNodeNames ) );
+	};
+
+	/**
+	 * Returns a function which checks whether the node is a block boundary.
+	 * See {@link CKEDITOR.dom.element#isBlockBoundary}.
+	 *
+	 * @static
+	 * @param customNodeNames
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.blockBoundary = function( customNodeNames ) {
+		return function( node ) {
+			return !( node.type == CKEDITOR.NODE_ELEMENT && node.isBlockBoundary( customNodeNames ) );
+		};
+	};
+
+	/**
+	 * @static
+	 * @todo
+	 */
+	CKEDITOR.dom.walker.listItemBoundary = function() {
+		return this.blockBoundary( { br: 1 } );
+	};
+
+	/**
+	 * Returns a function which checks whether the node is a bookmark node or the bookmark node
+	 * inner content.
+	 *
+	 * @static
+	 * @param {Boolean} [contentOnly=false] Whether only test against the text content of
+	 * a bookmark node instead of the element itself (default).
+	 * @param {Boolean} [isReject=false] Whether to return `false` for the bookmark
+	 * node instead of `true` (default).
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.bookmark = function( contentOnly, isReject ) {
+		function isBookmarkNode( node ) {
+			return ( node && node.getName && node.getName() == 'span' && node.data( 'cke-bookmark' ) );
+		}
+
+		return function( node ) {
+			var isBookmark, parent;
+			// Is bookmark inner text node?
+			isBookmark = ( node && node.type != CKEDITOR.NODE_ELEMENT && ( parent = node.getParent() ) && isBookmarkNode( parent ) );
+			// Is bookmark node?
+			isBookmark = contentOnly ? isBookmark : isBookmark || isBookmarkNode( node );
+			return !!( isReject ^ isBookmark );
+		};
+	};
+
+	/**
+	 * Returns a function which checks whether the node is a text node containing only whitespace characters.
+	 *
+	 * @static
+	 * @param {Boolean} [isReject=false]
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.whitespaces = function( isReject ) {
+		return function( node ) {
+			var isWhitespace;
+			if ( node && node.type == CKEDITOR.NODE_TEXT ) {
+				// Whitespace, as well as the Filling Char Sequence text node used in Webkit. (#9384, #13816)
+				isWhitespace = !CKEDITOR.tools.trim( node.getText() ) ||
+					CKEDITOR.env.webkit && node.getText() == CKEDITOR.dom.selection.FILLING_CHAR_SEQUENCE;
+			}
+
+			return !!( isReject ^ isWhitespace );
+		};
+	};
+
+	/**
+	 * Returns a function which checks whether the node is invisible in the WYSIWYG mode.
+	 *
+	 * @static
+	 * @param {Boolean} [isReject=false]
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.invisible = function( isReject ) {
+		var whitespace = CKEDITOR.dom.walker.whitespaces(),
+			// #12221 (Chrome) plus #11111 (Safari).
+			offsetWidth0 = CKEDITOR.env.webkit ? 1 : 0;
+
+		return function( node ) {
+			var invisible;
+
+			if ( whitespace( node ) )
+				invisible = 1;
+			else {
+				// Visibility should be checked on element.
+				if ( node.type == CKEDITOR.NODE_TEXT )
+					node = node.getParent();
+
+				// Nodes that take no spaces in wysiwyg:
+				// 1. White-spaces but not including NBSP.
+				// 2. Empty inline elements, e.g. <b></b>.
+				// 3. <br> elements (bogus, surrounded by text) (#12423).
+				invisible = node.$.offsetWidth <= offsetWidth0;
+			}
+
+			return !!( isReject ^ invisible );
+		};
+	};
+
+	/**
+	 * Returns a function which checks whether the node type is equal to the passed one.
+	 *
+	 * @static
+	 * @param {Number} type
+	 * @param {Boolean} [isReject=false]
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.nodeType = function( type, isReject ) {
+		return function( node ) {
+			return !!( isReject ^ ( node.type == type ) );
+		};
+	};
+
+	/**
+	 * Returns a function which checks whether the node is a bogus (filler) node from
+	 * `contenteditable` element's point of view.
+	 *
+	 * @static
+	 * @param {Boolean} [isReject=false]
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.bogus = function( isReject ) {
+		function nonEmpty( node ) {
+			return !isWhitespaces( node ) && !isBookmark( node );
+		}
+
+		return function( node ) {
+			var isBogus = CKEDITOR.env.needsBrFiller ? node.is && node.is( 'br' ) : node.getText && tailNbspRegex.test( node.getText() );
+
+			if ( isBogus ) {
+				var parent = node.getParent(),
+					next = node.getNext( nonEmpty );
+
+				isBogus = parent.isBlockBoundary() && ( !next || next.type == CKEDITOR.NODE_ELEMENT && next.isBlockBoundary() );
+			}
+
+			return !!( isReject ^ isBogus );
+		};
+	};
+
+	/**
+	 * Returns a function which checks whether the node is a temporary element
+	 * (element with the `data-cke-temp` attribute) or its child.
+	 *
+	 * @since 4.3
+	 * @static
+	 * @param {Boolean} [isReject=false] Whether to return `false` for the
+	 * temporary element instead of `true` (default).
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.temp = function( isReject ) {
+		return function( node ) {
+			if ( node.type != CKEDITOR.NODE_ELEMENT )
+				node = node.getParent();
+
+			var isTemp = node && node.hasAttribute( 'data-cke-temp' );
+
+			return !!( isReject ^ isTemp );
+		};
+	};
+
+	var tailNbspRegex = /^[\t\r\n ]*(?:&nbsp;|\xa0)$/,
+		isWhitespaces = CKEDITOR.dom.walker.whitespaces(),
+		isBookmark = CKEDITOR.dom.walker.bookmark(),
+		isTemp = CKEDITOR.dom.walker.temp(),
+		toSkip = function( node ) {
+			return isBookmark( node ) ||
+				isWhitespaces( node ) ||
+				node.type == CKEDITOR.NODE_ELEMENT && node.is( CKEDITOR.dtd.$inline ) && !node.is( CKEDITOR.dtd.$empty );
+		};
+
+	/**
+	 * Returns a function which checks whether the node should be ignored in terms of "editability".
+	 *
+	 * This includes:
+	 *
+	 * * whitespaces (see {@link CKEDITOR.dom.walker#whitespaces}),
+	 * * bookmarks (see {@link CKEDITOR.dom.walker#bookmark}),
+	 * * temporary elements (see {@link CKEDITOR.dom.walker#temp}).
+	 *
+	 * @since 4.3
+	 * @static
+	 * @param {Boolean} [isReject=false] Whether to return `false` for the
+	 * ignored element instead of `true` (default).
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.ignored = function( isReject ) {
+		return function( node ) {
+			var isIgnored = isWhitespaces( node ) || isBookmark( node ) || isTemp( node );
+
+			return !!( isReject ^ isIgnored );
+		};
+	};
+
+	var isIgnored = CKEDITOR.dom.walker.ignored();
+
+	/**
+	 * Returns a function which checks whether the node is empty.
+	 *
+	 * @since 4.5
+	 * @static
+	 * @param {Boolean} [isReject=false] Whether to return `false` for the
+	 * ignored element instead of `true` (default).
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.empty = function( isReject ) {
+		return function( node ) {
+			var i = 0,
+				l = node.getChildCount();
+
+			for ( ; i < l; ++i ) {
+				if ( !isIgnored( node.getChild( i ) ) ) {
+					return !!isReject;
+				}
+			}
+
+			return !isReject;
+		};
+	};
+
+	var isEmpty = CKEDITOR.dom.walker.empty();
+
+	function filterTextContainers( dtd ) {
+		var hash = {},
+			name;
+
+		for ( name in dtd ) {
+			if ( CKEDITOR.dtd[ name ][ '#' ] )
+				hash[ name ] = 1;
+		}
+		return hash;
+	}
+
+	/**
+	 * A hash of element names which in browsers that {@link CKEDITOR.env#needsBrFiller do not need `<br>` fillers}
+	 * can be selection containers despite being empty.
+	 *
+	 * @since 4.5
+	 * @static
+	 * @property {Object} validEmptyBlockContainers
+	 */
+	var validEmptyBlocks = CKEDITOR.dom.walker.validEmptyBlockContainers = CKEDITOR.tools.extend(
+		filterTextContainers( CKEDITOR.dtd.$block ),
+		{ caption: 1, td: 1, th: 1 }
+	);
+
+	function isEditable( node ) {
+		// Skip temporary elements, bookmarks and whitespaces.
+		if ( isIgnored( node ) )
+			return false;
+
+		if ( node.type == CKEDITOR.NODE_TEXT )
+			return true;
+
+		if ( node.type == CKEDITOR.NODE_ELEMENT ) {
+			// All inline and non-editable elements are valid editable places.
+			// Note: the <hr> is currently the only element in CKEDITOR.dtd.$empty and CKEDITOR.dtd.$block,
+			// but generally speaking we need an intersection of these two sets.
+			// Note: non-editable block has to be treated differently (should be selected entirely).
+			if ( node.is( CKEDITOR.dtd.$inline ) || node.is( 'hr' ) || node.getAttribute( 'contenteditable' ) == 'false' )
+				return true;
+
+			// Empty blocks are editable on IE.
+			if ( !CKEDITOR.env.needsBrFiller && node.is( validEmptyBlocks ) && isEmpty( node ) )
+				return true;
+		}
+
+		// Skip all other nodes.
+		return false;
+	}
+
+	/**
+	 * Returns a function which checks whether the node can be a container or a sibling
+	 * of the selection end.
+	 *
+	 * This includes:
+	 *
+	 * * text nodes (but not whitespaces),
+	 * * inline elements,
+	 * * intersection of {@link CKEDITOR.dtd#$empty} and {@link CKEDITOR.dtd#$block} (currently
+	 * it is only `<hr>`),
+	 * * non-editable blocks (special case &mdash; such blocks cannot be containers nor
+	 * siblings, they need to be selected entirely),
+	 * * empty {@link #validEmptyBlockContainers blocks} which can contain text
+	 * ({@link CKEDITOR.env#needsBrFiller old IEs only}).
+	 *
+	 * @since 4.3
+	 * @static
+	 * @param {Boolean} [isReject=false] Whether to return `false` for the
+	 * ignored element instead of `true` (default).
+	 * @returns {Function}
+	 */
+	CKEDITOR.dom.walker.editable = function( isReject ) {
+		return function( node ) {
+			return !!( isReject ^ isEditable( node ) );
+		};
+	};
+
+	/**
+	 * Checks if there is a filler node at the end of an element, and returns it.
+	 *
+	 * @member CKEDITOR.dom.element
+	 * @returns {CKEDITOR.dom.node/Boolean} Bogus node or `false`.
+	 */
+	CKEDITOR.dom.element.prototype.getBogus = function() {
+		// Bogus are not always at the end, e.g. <p><a>text<br /></a></p> (#7070).
+		var tail = this;
+		do {
+			tail = tail.getPreviousSourceNode();
+		}
+		while ( toSkip( tail ) );
+
+		if ( tail && ( CKEDITOR.env.needsBrFiller ? tail.is && tail.is( 'br' ) : tail.getText && tailNbspRegex.test( tail.getText() ) ) )
+			return tail;
+
+		return false;
+	};
+
+} )();

ckeditor/core/dom/window.js

@@ -0,0 +1,95 @@
+/**
+ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.dom.document} class, which
+ *		represents a DOM document.
+ */
+
+/**
+ * Represents a DOM window.
+ *
+ *		var document = new CKEDITOR.dom.window( window );
+ *
+ * @class
+ * @extends CKEDITOR.dom.domObject
+ * @constructor Creates a window class instance.
+ * @param {Object} domWindow A native DOM window.
+ */
+CKEDITOR.dom.window = function( domWindow ) {
+	CKEDITOR.dom.domObject.call( this, domWindow );
+};
+
+CKEDITOR.dom.window.prototype = new CKEDITOR.dom.domObject();
+
+CKEDITOR.tools.extend( CKEDITOR.dom.window.prototype, {
+	/**
+	 * Moves the selection focus to this window.
+	 *
+	 *		var win = new CKEDITOR.dom.window( window );
+	 *		win.focus();
+	 */
+	focus: function() {
+		this.$.focus();
+	},
+
+	/**
+	 * Gets the width and height of this window's viewable area.
+	 *
+	 *		var win = new CKEDITOR.dom.window( window );
+	 *		var size = win.getViewPaneSize();
+	 *		alert( size.width );
+	 *		alert( size.height );
+	 *
+	 * @returns {Object} An object with the `width` and `height`
+	 * properties containing the size.
+	 */
+	getViewPaneSize: function() {
+		var doc = this.$.document,
+			stdMode = doc.compatMode == 'CSS1Compat';
+		return {
+			width: ( stdMode ? doc.documentElement.clientWidth : doc.body.clientWidth ) || 0,
+			height: ( stdMode ? doc.documentElement.clientHeight : doc.body.clientHeight ) || 0
+		};
+	},
+
+	/**
+	 * Gets the current position of the window's scroll.
+	 *
+	 *		var win = new CKEDITOR.dom.window( window );
+	 *		var pos = win.getScrollPosition();
+	 *		alert( pos.x );
+	 *		alert( pos.y );
+	 *
+	 * @returns {Object} An object with the `x` and `y` properties
+	 * containing the scroll position.
+	 */
+	getScrollPosition: function() {
+		var $ = this.$;
+
+		if ( 'pageXOffset' in $ ) {
+			return {
+				x: $.pageXOffset || 0,
+				y: $.pageYOffset || 0
+			};
+		} else {
+			var doc = $.document;
+			return {
+				x: doc.documentElement.scrollLeft || doc.body.scrollLeft || 0,
+				y: doc.documentElement.scrollTop || doc.body.scrollTop || 0
+			};
+		}
+	},
+
+	/**
+	 * Gets the frame element containing this window context.
+	 *
+	 * @returns {CKEDITOR.dom.element} The frame element or `null` if not in a frame context.
+	 */
+	getFrame: function() {
+		var iframe = this.$.frameElement;
+		return iframe ? new CKEDITOR.dom.element.get( iframe ) : null;
+	}
+} );