mediawiki-extensions-Visual.../modules/ve-mw/dm/nodes/ve.dm.MWReferenceNode.js

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/*!
* VisualEditor DataModel MWReferenceNode class.
*
* @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
* @license The MIT License (MIT); see LICENSE.txt
*/
/**
* DataModel MediaWiki reference node.
*
* @class
* @extends ve.dm.LeafNode
* @constructor
* @param {number} [length] Length of content data in document; ignored and overridden to 0
* @param {Object} [element] Reference to element in linear model
*/
ve.dm.MWReferenceNode = function VeDmMWReferenceNode( length, element ) {
// Parent constructor
ve.dm.LeafNode.call( this, 0, element );
// Event handlers
this.connect( this, {
'root': 'onRoot',
'unroot': 'onUnroot'
} );
};
/* Inheritance */
ve.inheritClass( ve.dm.MWReferenceNode, ve.dm.LeafNode );
/* Static members */
ve.dm.MWReferenceNode.static.name = 'mwReference';
ve.dm.MWReferenceNode.static.matchTagNames = null;
ve.dm.MWReferenceNode.static.matchRdfaTypes = [ 'mw:Extension/ref' ];
ve.dm.MWReferenceNode.static.isContent = true;
ve.dm.MWReferenceNode.static.toDataElement = function ( domElements, converter ) {
var dataElement,
mwDataJSON = domElements[0].getAttribute( 'data-mw' ),
mwData = mwDataJSON ? JSON.parse( mwDataJSON ) : {},
body = mwData.body ? mwData.body.html : '',
refGroup = mwData.attrs && mwData.attrs.group || '',
listGroup = this.name + '/' + refGroup,
listKey = mwData.attrs && mwData.attrs.name !== undefined ? mwData.attrs.name : null,
queueResult = converter.internalList.queueItemHtml( listGroup, listKey, body ),
listIndex = queueResult.index,
contentsUsed = ( body !== '' && queueResult.isNew );
dataElement = {
'type': this.name,
'attributes': {
'mw': mwData,
'originalMw': mwDataJSON,
'childDomElements': ve.copy( Array.prototype.slice.apply( domElements[0].childNodes ) ),
'listIndex': listIndex,
'listGroup': listGroup,
'listKey': listKey,
'refGroup': refGroup,
'contentsUsed': contentsUsed
}
};
return dataElement;
};
ve.dm.MWReferenceNode.static.toDomElements = function ( dataElement, doc, converter ) {
var itemNodeHtml, originalHtml, mwData, i, iLen, keyedNodes, setContents, contentsAlreadySet,
originalMw, childDomElements,
el = doc.createElement( 'span' ),
itemNodeWrapper = doc.createElement( 'div' ),
itemNode = converter.internalList.getItemNode( dataElement.attributes.listIndex ),
itemNodeRange = itemNode.getRange();
el.setAttribute( 'typeof', 'mw:Extension/ref' );
mwData = dataElement.attributes.mw ? ve.copy( dataElement.attributes.mw ) : {};
mwData.name = 'ref';
setContents = dataElement.attributes.contentsUsed || dataElement.attributes.listKey === null;
keyedNodes = converter.internalList
.getNodeGroup( dataElement.attributes.listGroup )
.keyedNodes[dataElement.attributes.listKey];
if ( setContents ) {
// Check if a previous node has already set the content. If so, we don't overwrite this
// node's contents.
contentsAlreadySet = false;
if ( keyedNodes ) {
for ( i = 0, iLen = keyedNodes.length; i < iLen; i++ ) {
if ( keyedNodes[i].element === dataElement ) {
break;
}
if ( keyedNodes[i].element.attributes.contentsUsed ) {
contentsAlreadySet = true;
break;
}
}
}
} else {
// Check if any other nodes with this key provided content. If not
// then we attach the contents to the first reference with this key
// Check that this the first reference with its key
if ( keyedNodes && dataElement === keyedNodes[0].element ) {
setContents = true;
// Check no other reference originally defined the contents
// As this is keyedNodes[0] we can start at 1
for ( i = 1, iLen = keyedNodes.length; i < iLen; i++ ) {
if ( keyedNodes[i].element.attributes.contentsUsed ) {
setContents = false;
break;
}
}
}
}
if ( setContents && !contentsAlreadySet ) {
converter.getDomSubtreeFromData(
itemNode.getDocument().getFullData( new ve.Range( itemNodeRange.start, itemNodeRange.end ), true ),
itemNodeWrapper
);
itemNodeHtml = $( itemNodeWrapper ).html(); // Returns '' if itemNodeWrapper is empty
originalHtml = ve.getProp( mwData, 'body', 'html' ) || '';
// Only set body.html if itemNodeHtml and originalHtml are actually different
if ( !$( '<div>' ).html( originalHtml ).get( 0 ).isEqualNode( itemNodeWrapper ) ) {
ve.setProp( mwData, 'body', 'html', itemNodeHtml );
}
}
// Set or clear key
if ( dataElement.attributes.listKey !== null ) {
ve.setProp( mwData, 'attrs', 'name', dataElement.attributes.listKey );
} else if ( mwData.attrs ) {
delete mwData.attrs.listKey;
}
// Set or clear group
if ( dataElement.attributes.refGroup !== '' ) {
ve.setProp( mwData, 'attrs', 'group', dataElement.attributes.refGroup );
} else if ( mwData.attrs ) {
delete mwData.attrs.refGroup;
}
// If mwAttr and originalMw are the same, use originalMw to prevent reserialization.
// Reserialization has the potential to reorder keys and so change the DOM unnecessarily
originalMw = dataElement.attributes.originalMw;
if ( originalMw && ve.compare( mwData, JSON.parse( originalMw ) ) ) {
el.setAttribute( 'data-mw', originalMw );
// Restore the span's childNodes to prevent unnecessary DOM diffs
childDomElements = ve.copyDomElements( dataElement.attributes.childDomElements, doc );
for ( i = 0, iLen = childDomElements.length; i < iLen; i++ ) {
el.appendChild( childDomElements[i] );
}
} else {
el.setAttribute( 'data-mw', JSON.stringify( mwData ) );
}
return [ el ];
};
ve.dm.MWReferenceNode.static.remapInternalListIndexes = function ( dataElement, mapping ) {
dataElement.attributes.listIndex = mapping[dataElement.attributes.listIndex];
};
/* Methods */
/**
* Don't allow reference nodes to be inspected if we can't find their contents.
*
* @inheritdoc
*/
ve.dm.MWReferenceNode.prototype.isInspectable = function () {
var internalItem = this.getInternalItem();
return internalItem && internalItem.getLength() > 0;
};
/**
* Gets the internal item node associated with this node
* @method
* @returns {ve.dm.InternalItemNode} Item node
*/
ve.dm.MWReferenceNode.prototype.getInternalItem = function () {
return this.getDocument().getInternalList().getItemNode( this.getAttribute( 'listIndex' ) );
};
/**
* Handle the node being attached to the root
* @method
*/
ve.dm.MWReferenceNode.prototype.onRoot = function () {
this.addToInternalList();
};
/**
* Handle the node being detatched from the root
* @method
*/
ve.dm.MWReferenceNode.prototype.onUnroot = function () {
this.removeFromInternalList();
};
/**
* Register the node with the internal list
* @method
*/
ve.dm.MWReferenceNode.prototype.addToInternalList = function () {
if ( this.getRoot() === this.getDocument().getDocumentNode() ) {
this.getDocument().getInternalList().addNode(
this.element.attributes.listGroup,
this.element.attributes.listKey,
this.element.attributes.listIndex,
this
);
}
};
/**
* Unregister the node from the internal list
* @method
*/
ve.dm.MWReferenceNode.prototype.removeFromInternalList = function () {
this.getDocument().getInternalList().removeNode(
this.element.attributes.listGroup,
this.element.attributes.listKey,
this.element.attributes.listIndex,
this
);
};
ve.dm.MWReferenceNode.prototype.getClonedElement = function () {
var clone = ve.dm.LeafNode.prototype.getClonedElement.call( this );
delete clone.attributes.contentsUsed;
delete clone.attributes.originalMw;
return clone;
};
/* Registration */
ve.dm.modelRegistry.register( ve.dm.MWReferenceNode );