/**
* @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
// * <body> 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.$.offsetWidth <= offsetWidth0;
}
return !!( isReject ^ invisible );
};
};
/**
* Returns a function which checks whether the node type is equal to the passed one.
*
* @static
* @param {Number} type
* @param {Boolean} [isReject=false]
* @returns {Function}
*/
CKEDITOR.dom.walker.nodeType = function( type, isReject ) {
return function( node ) {
return !!( isReject ^ ( node.type == type ) );
};
};
/**
* Returns a function which checks whether the node is a bogus (filler) node from
* `contenteditable` element's point of view.
*
* @static
* @param {Boolean} [isReject=false]
* @returns {Function}
*/
CKEDITOR.dom.walker.bogus = function( isReject ) {
function nonEmpty( node ) {
return !isWhitespaces( node ) && !isBookmark( node );
}
return function( node ) {
var isBogus = CKEDITOR.env.needsBrFiller ? node.is && node.is( 'br' ) : node.getText && tailNbspRegex.test( node.getText() );
if ( isBogus ) {
var parent = node.getParent(),
next = node.getNext( nonEmpty );
isBogus = parent.isBlockBoundary() && ( !next || next.type == CKEDITOR.NODE_ELEMENT && next.isBlockBoundary() );
}
return !!( isReject ^ isBogus );
};
};
/**
* Returns a function which checks whether the node is a temporary element
* (element with the `data-cke-temp` attribute) or its child.
*
* @since 4.3
* @static
* @param {Boolean} [isReject=false] Whether to return `false` for the
* temporary element instead of `true` (default).
* @returns {Function}
*/
CKEDITOR.dom.walker.temp = function( isReject ) {
return function( node ) {
if ( node.type != CKEDITOR.NODE_ELEMENT )
node = node.getParent();
var isTemp = node && node.hasAttribute( 'data-cke-temp' );
return !!( isReject ^ isTemp );
};
};
var tailNbspRegex = /^[\t\r\n ]*(?: |\xa0)$/,
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 — 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;
};
} )();
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