mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-05 14:12:53 +00:00
284 lines
8.3 KiB
JavaScript
284 lines
8.3 KiB
JavaScript
/*!
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* VisualEditor ContentEditable namespace.
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*
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* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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/**
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* Namespace for all VisualEditor ContentEditable classes, static methods and static properties.
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* @class
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* @singleton
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*/
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ve.ce = {
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//'nodeFactory': Initialized in ve.ce.NodeFactory.js
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};
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/* Static Properties */
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/**
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* RegExp pattern for matching all whitespaces in HTML text.
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*
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* \u0020 (32) space
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* \u00A0 (160) non-breaking space
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*
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* @property
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*/
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ve.ce.whitespacePattern = /[\u0020\u00A0]/g;
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/* Static Methods */
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/**
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* Gets the plain text of a DOM element (that is a node canContainContent === true)
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*
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* In the returned string only the contents of text nodes are included, and the contents of
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* non-editable elements are excluded (but replaced with the appropriate number of characters
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* so the offsets match up with the linear model).
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*
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* @method
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* @param {HTMLElement} element DOM element to get text of
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* @returns {string} Plain text of DOM element
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*/
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ve.ce.getDomText = function ( element ) {
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var func = function ( element ) {
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var nodeType = element.nodeType,
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text = '',
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numChars,
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$element = $( element );
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if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
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if ( $element.hasClass( 've-ce-branchNode-slug' ) ) {
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// Slugs are not represented in the model at all, but they do
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// contain a single nbsp/FEFF character in the DOM, so make sure
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// that character isn't counted
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return '';
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} else if ( $element.hasClass( 've-ce-leafNode' ) ) {
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// For leaf nodes, don't return the content, but return
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// the right amount of characters so the offsets match up
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numChars = $element.data( 'view' ).getOuterLength();
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return new Array( numChars + 1 ).join( '\u2603' );
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} else {
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// Traverse its children
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for ( element = element.firstChild; element; element = element.nextSibling ) {
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text += func( element );
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}
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}
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} else if ( nodeType === 3 || nodeType === 4 ) {
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return element.nodeValue;
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}
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return text;
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};
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// Return the text, replacing spaces and non-breaking spaces with spaces?
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// TODO: Why are we replacing spaces (\u0020) with spaces (' ')
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return func( element ).replace( ve.ce.whitespacePattern, ' ' );
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};
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/**
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* Gets a hash of a DOM element's structure.
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*
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* In the returned string text nodes are represented as "#" and elements are represented as "<type>"
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* and "</type>" where "type" is their element name. This effectively generates an HTML
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* serialization without any attributes or text contents. This can be used to observe structural
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* changes.
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*
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* @method
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* @param {HTMLElement} element DOM element to get hash of
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* @returns {string} Hash of DOM element
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*/
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ve.ce.getDomHash = function ( element ) {
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var nodeType = element.nodeType,
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nodeName = element.nodeName,
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hash = '';
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if ( nodeType === 3 || nodeType === 4 ) {
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return '#';
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} else if ( nodeType === 1 || nodeType === 9 ) {
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hash += '<' + nodeName + '>';
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// Traverse its children
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for ( element = element.firstChild; element; element = element.nextSibling ) {
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hash += ve.ce.getDomHash( element );
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}
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hash += '</' + nodeName + '>';
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}
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return hash;
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};
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/**
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* Gets the linear offset from a given DOM node and offset within it.
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*
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* @method
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* @param {HTMLElement} domNode DOM node
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* @param {number} domOffset DOM offset within the DOM node
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* @returns {number} Linear model offset
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*/
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ve.ce.getOffset = function ( domNode, domOffset ) {
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if ( domNode.nodeType === Node.TEXT_NODE ) {
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return ve.ce.getOffsetFromTextNode( domNode, domOffset );
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} else {
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return ve.ce.getOffsetFromElementNode( domNode, domOffset );
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}
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};
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/**
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* Gets the linear offset from a given text node and offset within it.
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*
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* @method
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* @param {HTMLElement} domNode DOM node
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* @param {number} domOffset DOM offset within the DOM Element
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* @returns {number} Linear model offset
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*/
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ve.ce.getOffsetFromTextNode = function ( domNode, domOffset ) {
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var $node, nodeModel, current, stack, item, offset, $item;
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$node = $( domNode ).closest(
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'.ve-ce-branchNode, .ve-ce-leafNode'
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);
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nodeModel = $node.data( 'view' ).getModel();
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// IE sometimes puts the cursor in a text node inside ce="false". BAD!
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if ( $node[0].contentEditable === 'false' ) {
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return nodeModel.getOffset() + nodeModel.getOuterLength();
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}
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if ( ! $node.hasClass( 've-ce-branchNode' ) ) {
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return nodeModel.getOffset();
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}
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current = [$node.contents(), 0];
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stack = [current];
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offset = 0;
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while ( stack.length > 0 ) {
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if ( current[1] >= current[0].length ) {
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stack.pop();
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current = stack[ stack.length - 1 ];
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continue;
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}
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item = current[0][current[1]];
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if ( item.nodeType === Node.TEXT_NODE ) {
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if ( item === domNode ) {
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// domOffset is a byte offset, convert it to a grapheme cluster offset
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offset += ve.getClusterOffset( item.textContent, domOffset );
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break;
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} else {
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offset += ve.getClusterOffset( item.textContent, item.textContent.length );
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}
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} else if ( item.nodeType === Node.ELEMENT_NODE ) {
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$item = current[0].eq( current[1] );
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if ( $item.hasClass( 've-ce-branchNode-slug' ) ) {
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if ( $item.contents()[0] === domNode ) {
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break;
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}
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} else if ( $item.hasClass( 've-ce-leafNode' ) ) {
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offset += 2;
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} else if ( $item.hasClass( 've-ce-branchNode' ) ) {
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offset += $item.data( 'view' ).getOuterLength();
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} else {
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stack.push( [ $item.contents(), 0 ] );
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current[1]++;
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current = stack[ stack.length - 1 ];
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continue;
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}
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}
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current[1]++;
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}
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return offset + nodeModel.getOffset() + ( nodeModel.isWrapped() ? 1 : 0 );
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};
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/**
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* Gets the linear offset from a given element node and offset within it.
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*
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* @method
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* @param {HTMLElement} domNode DOM node
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* @param {number} domOffset DOM offset within the DOM Element
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* @param {boolean} [addOuterLength] Use outer length, which includes wrappers if any exist
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* @returns {number} Linear model offset
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*/
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ve.ce.getOffsetFromElementNode = function ( domNode, domOffset, addOuterLength ) {
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var $domNode = $( domNode ),
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nodeModel,
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node;
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if ( $domNode.hasClass( 've-ce-branchNode-slug' ) ) {
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if ( $domNode.prev().length ) {
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nodeModel = $domNode.prev().data( 'view' ).getModel();
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return nodeModel.getOffset() + nodeModel.getOuterLength();
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}
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if ( $domNode.next().length ) {
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nodeModel = $domNode.next().data( 'view' ).getModel();
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return nodeModel.getOffset();
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}
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}
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// IE sometimes puts the cursor in a text node inside ce="false". BAD!
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if ( domNode.contentEditable === 'false' ) {
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nodeModel = $domNode.data( 'view' ).getModel();
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return nodeModel.getOffset() + nodeModel.getOuterLength();
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}
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if ( domOffset === 0 ) {
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node = $domNode.data( 'view' );
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if ( node && node instanceof ve.ce.Node ) {
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nodeModel = $domNode.data( 'view' ).getModel();
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if ( addOuterLength === true ) {
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return nodeModel.getOffset() + nodeModel.getOuterLength();
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} else {
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return nodeModel.getOffset() + ( nodeModel.isWrapped() ? 1 : 0 );
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}
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} else {
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node = $domNode.contents().last()[0];
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}
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} else {
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node = $domNode.contents()[ domOffset - 1 ];
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}
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if ( node.nodeType === Node.TEXT_NODE ) {
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return ve.ce.getOffsetFromTextNode( node, node.length );
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} else {
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return ve.ce.getOffsetFromElementNode( node, 0, true );
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}
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};
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/**
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* Gets the linear offset of a given slug
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*
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* @method
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* @param {jQuery} $node jQuery slug selection
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* @returns {number} Linear model offset
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* @throws {Error}
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*/
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ve.ce.getOffsetOfSlug = function ( $node ) {
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var model;
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if ( $node.index() === 0 ) {
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model = $node.parent().data( 'view' ).getModel();
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return model.getOffset() + ( model.isWrapped() ? 1 : 0 );
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} else if ( $node.prev().length ) {
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model = $node.prev().data( 'view' ).getModel();
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return model.getOffset() + model.getOuterLength();
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} else {
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throw new Error( 'Incorrect slug location' );
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}
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};
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ve.ce.isLeftOrRightArrowKey = function ( keyCode ) {
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return keyCode === ve.Keys.LEFT || keyCode === ve.Keys.RIGHT;
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};
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ve.ce.isUpOrDownArrowKey = function ( keyCode ) {
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return keyCode === ve.Keys.UP || keyCode === ve.Keys.DOWN;
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};
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ve.ce.isArrowKey = function ( keyCode ) {
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return ve.ce.isLeftOrRightArrowKey( keyCode ) || ve.ce.isUpOrDownArrowKey( keyCode );
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};
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/**
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* Check if keyboard shortcut modifier key is pressed.
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*
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* @method
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* @param {jQuery.Event} e Key press event
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*/
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ve.ce.isShortcutKey = function ( e ) {
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return e.ctrlKey || e.metaKey;
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};
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