mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-12-25 12:33:19 +00:00
490 lines
13 KiB
JavaScript
490 lines
13 KiB
JavaScript
/*!
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* VisualEditor DataModel MWTransclusionModel class.
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*
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* @copyright 2011-2015 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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( function () {
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var hasOwn = Object.hasOwnProperty,
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specCache = {};
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/**
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* MediaWiki transclusion model.
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*
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* @class
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* @mixins OO.EventEmitter
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*
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* @constructor
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*/
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ve.dm.MWTransclusionModel = function VeDmMWTransclusionModel() {
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// Mixin constructors
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OO.EventEmitter.call( this );
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// Properties
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this.parts = [];
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this.uid = 0;
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this.requests = [];
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this.queue = [];
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this.specCache = specCache;
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};
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/* Inheritance */
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OO.mixinClass( ve.dm.MWTransclusionModel, OO.EventEmitter );
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/* Events */
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/**
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* @event replace
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* @param {ve.dm.MWTransclusionPartModel|null} removed Removed part
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* @param {ve.dm.MWTransclusionPartModel|null} added Added part
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*/
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/**
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* @event change
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*/
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/* Methods */
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/**
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* Insert transclusion at the end of a surface fragment.
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*
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* @param {ve.dm.SurfaceFragment} surfaceModel Surface fragment to insert at
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*/
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ve.dm.MWTransclusionModel.prototype.insertTransclusionNode = function ( surfaceFragment ) {
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surfaceFragment
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.insertContent( [
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{
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type: 'mwTransclusionInline',
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attributes: {
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mw: this.getPlainObject()
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}
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},
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{ type: '/mwTransclusionInline' }
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] );
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};
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/**
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* Update transclusion node in a document.
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*
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* @param {ve.dm.Surface} surfaceModel Surface model of main document
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* @param {ve.dm.MWTransclusionNode} node Transclusion node to update
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*/
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ve.dm.MWTransclusionModel.prototype.updateTransclusionNode = function ( surfaceModel, node ) {
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var obj = this.getPlainObject();
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if ( obj !== null ) {
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surfaceModel.getLinearFragment( node.getOuterRange(), true )
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.changeAttributes( { mw: obj } );
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} else {
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surfaceModel.getLinearFragment( node.getOuterRange(), true )
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.removeContent();
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}
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};
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/**
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* Load from transclusion data, and fetch spec from server.
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*
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* @param {Object} data Transclusion data
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* @returns {jQuery.Promise} Promise, resolved when spec is loaded
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*/
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ve.dm.MWTransclusionModel.prototype.load = function ( data ) {
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var i, len, part, deferred,
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promises = [];
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// Convert single part format to multi-part format
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// Parsoid doesn't use this format any more, but we accept it for backwards compatibility
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if ( data.params && data.target ) {
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data = { parts: [ { template: data } ] };
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}
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if ( Array.isArray( data.parts ) ) {
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for ( i = 0, len = data.parts.length; i < len; i++ ) {
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part = data.parts[i];
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if ( part.template ) {
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deferred = $.Deferred();
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promises.push( deferred.promise() );
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this.queue.push( {
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add: ve.dm.MWTemplateModel.newFromData( this, part.template ),
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deferred: deferred
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} );
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} else if ( typeof part === 'string' ) {
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deferred = $.Deferred();
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promises.push( deferred.promise() );
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this.queue.push( {
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add: new ve.dm.MWTransclusionContentModel( this, part ),
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deferred: deferred
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} );
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}
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}
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setTimeout( this.fetch.bind( this ) );
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}
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return $.when.apply( $, promises );
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};
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/**
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* Process one or more queue items.
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*
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* @param {Object[]} queue List of objects containing parts to add and optionally indexes to add
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* them at, if no index is given parts will be added at the end
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* @fires replace For each item added
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* @fires change
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*/
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ve.dm.MWTransclusionModel.prototype.process = function ( queue ) {
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var i, len, item, title, index, remove, existing, resolveQueue = [];
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for ( i = 0, len = queue.length; i < len; i++ ) {
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remove = 0;
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item = queue[i];
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if ( item.add instanceof ve.dm.MWTemplateModel ) {
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title = item.add.getTitle();
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if ( hasOwn.call( specCache, title ) && specCache[title] ) {
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item.add.getSpec().extend( specCache[title] );
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}
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}
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// Use specified index
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index = item.index;
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// Auto-remove if already existing, preserving index
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existing = this.parts.indexOf( item.add );
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if ( existing !== -1 ) {
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this.removePart( item.add );
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if ( index && existing + 1 < index ) {
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index--;
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}
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}
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// Derive index from removal if given
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if ( index === undefined && item.remove ) {
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index = this.parts.indexOf( item.remove );
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if ( index !== -1 ) {
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remove = 1;
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}
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}
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// Use last index as a last resort
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if ( index === undefined || index === -1 ) {
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index = this.parts.length;
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}
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this.parts.splice( index, remove, item.add );
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if ( item.add ) {
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item.add.connect( this, { change: [ 'emit', 'change' ] } );
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}
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if ( item.remove ) {
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item.remove.disconnect( this );
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}
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this.emit( 'replace', item.remove || null, item.add );
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// Resolve promises
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if ( item.deferred ) {
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resolveQueue.push( item.deferred );
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}
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}
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this.emit( 'change' );
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// We need to go back and resolve the deferreds after emitting change.
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// Otherwise we get silly situations like a single change event being
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// guaranteed after the transclusion loaded promise gets resolved.
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for ( i = 0; i < resolveQueue.length; i++ ) {
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resolveQueue[i].resolve();
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}
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};
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/** */
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ve.dm.MWTransclusionModel.prototype.fetch = function () {
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if ( !this.queue.length ) {
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return;
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}
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var i, len, item, title,
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titles = [],
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specs = {},
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queue = this.queue.slice();
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// Clear shared queue for future calls
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this.queue.length = 0;
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// Get unique list of template titles that aren't already loaded
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for ( i = 0, len = queue.length; i < len; i++ ) {
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item = queue[i];
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if ( item.add instanceof ve.dm.MWTemplateModel ) {
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title = item.add.getTitle();
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if (
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// Skip titles that don't have a resolvable href
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title &&
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// Skip titles outside the template namespace
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title.charAt( 0 ) !== ':' &&
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// Skip already cached data
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!hasOwn.call( specCache, title ) &&
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// Skip duplicate titles in the same batch
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titles.indexOf( title ) === -1
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) {
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titles.push( title );
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}
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}
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}
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// Bypass server for empty lists
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if ( !titles.length ) {
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setTimeout( this.process.bind( this, queue ) );
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return;
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}
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this.requests.push( this.fetchRequest( titles, specs, queue ) );
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};
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ve.dm.MWTransclusionModel.prototype.fetchRequest = function ( titles, specs, queue ) {
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var xhr = new mw.Api().get( {
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action: 'templatedata',
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titles: titles.join( '|' ),
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lang: mw.config.get( 'wgUserLanguage' ),
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redirects: '1'
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} ).done( this.fetchRequestDone.bind( this, titles, specs ) );
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xhr.always( this.fetchRequestAlways.bind( this, queue, xhr ) );
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return xhr;
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};
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ve.dm.MWTransclusionModel.prototype.fetchRequestDone = function ( titles, specs, data ) {
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var i, len, id, title, aliasMap = [];
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if ( data && data.pages ) {
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// Keep spec data on hand for future use
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for ( id in data.pages ) {
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specs[data.pages[id].title] = data.pages[id];
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}
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// Follow redirects
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if ( data.redirects ) {
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aliasMap = data.redirects;
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}
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// Follow MW's normalisation
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if ( data.normalized ) {
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ve.batchPush( aliasMap, data.normalized );
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}
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// Cross-reference aliased titles.
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for ( i = 0, len = aliasMap.length; i < len; i++ ) {
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// Only define the alias if the target exists, otherwise
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// we create a new property with an invalid "undefined" value.
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if ( hasOwn.call( specs, aliasMap[i].to ) ) {
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specs[aliasMap[i].from] = specs[aliasMap[i].to];
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}
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}
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// Prevent asking again for templates that have no specs
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for ( i = 0, len = titles.length; i < len; i++ ) {
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title = titles[i];
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if ( !specs[title] ) {
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specs[title] = null;
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}
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}
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ve.extendObject( specCache, specs );
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}
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};
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ve.dm.MWTransclusionModel.prototype.fetchRequestAlways = function ( queue, apiPromise ) {
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// Prune completed request
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var index = this.requests.indexOf( apiPromise );
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if ( index !== -1 ) {
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this.requests.splice( index, 1 );
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}
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// Actually add queued items
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this.process( queue );
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};
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/**
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* Abort any pending requests.
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*/
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ve.dm.MWTransclusionModel.prototype.abortRequests = function () {
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var i, len;
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for ( i = 0, len = this.requests.length; i < len; i++ ) {
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this.requests[i].abort();
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}
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this.requests.length = 0;
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};
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/**
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* Get plain object representation of template transclusion.
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*
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* @returns {Object|null} Plain object representation, or null if empty
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*/
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ve.dm.MWTransclusionModel.prototype.getPlainObject = function () {
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var i, len, part, serialization,
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obj = { parts: [] };
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for ( i = 0, len = this.parts.length; i < len; i++ ) {
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part = this.parts[i];
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serialization = part.serialize();
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if ( serialization !== undefined && serialization !== '' ) {
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obj.parts.push( serialization );
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}
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}
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if ( obj.parts.length === 0 ) {
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return null;
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}
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return obj;
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};
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/**
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* Get the wikitext for this transclusion.
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*
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* @returns {string} Wikitext like `{{foo|1=bar|baz=quux}}`
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*/
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ve.dm.MWTransclusionModel.prototype.getWikitext = function () {
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var i, len,
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wikitext = '';
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for ( i = 0, len = this.parts.length; i < len; i++ ) {
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wikitext += this.parts[i].getWikitext();
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}
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return wikitext;
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};
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/**
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* Get a unique ID for a part in the transclusion.
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*
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* This is used to give parts unique IDs, and returns a different value each time it's called.
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*
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* @returns {number} Unique ID
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*/
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ve.dm.MWTransclusionModel.prototype.getUniquePartId = function () {
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return this.uid++;
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};
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/**
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* Replace part.
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*
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* Replace asynchonously.
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*
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* @param {ve.dm.MWTransclusionPartModel} remove Part to remove
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* @param {ve.dm.MWTransclusionPartModel} add Part to add
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* @throws {Error} If part to remove is not valid
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* @throws {Error} If part to add is not valid
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* @returns {jQuery.Promise} Promise, resolved when part is added
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*/
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ve.dm.MWTransclusionModel.prototype.replacePart = function ( remove, add ) {
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var deferred = $.Deferred();
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if (
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!( remove instanceof ve.dm.MWTransclusionPartModel ) ||
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!( add instanceof ve.dm.MWTransclusionPartModel )
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) {
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throw new Error( 'Invalid transclusion part' );
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}
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this.queue.push( { remove: remove, add: add, deferred: deferred } );
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// Fetch on next yield to process items in the queue together, subsequent calls to fetch will
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// have no effect because the queue will be clear
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setTimeout( this.fetch.bind( this ) );
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return deferred.promise();
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};
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/**
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* Add part.
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*
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* Added asynchronously, but order is preserved.
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*
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* @param {ve.dm.MWTransclusionPartModel} part Part to add
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* @param {number} [index] Specific index to add content at, defaults to the end
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* @throws {Error} If part is not valid
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* @returns {jQuery.Promise} Promise, resolved when part is added
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*/
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ve.dm.MWTransclusionModel.prototype.addPart = function ( part, index ) {
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var deferred = $.Deferred();
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if ( !( part instanceof ve.dm.MWTransclusionPartModel ) ) {
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throw new Error( 'Invalid transclusion part' );
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}
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this.queue.push( { add: part, index: index, deferred: deferred } );
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// Fetch on next yield to process items in the queue together, subsequent calls to fetch will
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// have no effect because the queue will be clear
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setTimeout( this.fetch.bind( this ) );
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return deferred.promise();
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};
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/**
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* Remove a part.
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*
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* @param {ve.dm.MWTransclusionPartModel} part Part to remove
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* @fires replace
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*/
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ve.dm.MWTransclusionModel.prototype.removePart = function ( part ) {
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var index = this.parts.indexOf( part );
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if ( index !== -1 ) {
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this.parts.splice( index, 1 );
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part.disconnect( this );
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this.emit( 'replace', part, null );
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}
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};
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/**
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* Get all parts.
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*
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* @returns {ve.dm.MWTransclusionPartModel[]} Parts in transclusion
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*/
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ve.dm.MWTransclusionModel.prototype.getParts = function () {
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return this.parts;
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};
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/**
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* Get part by its ID.
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*
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* Matching is performed against the first section of the `id`, delimited by a '/'.
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*
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* @param {string} id Part ID
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* @returns {ve.dm.MWTransclusionPartModel|null} Part with matching ID, if found
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*/
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ve.dm.MWTransclusionModel.prototype.getPartFromId = function ( id ) {
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var i, len,
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// For ids from ve.dm.MWParameterModel, compare against the part id
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// of the parameter instead of the entire model id (e.g. "part_1" instead of "part_1/foo").
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partId = id.split( '/' )[0];
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for ( i = 0, len = this.parts.length; i < len; i++ ) {
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if ( this.parts[i].getId() === partId ) {
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return this.parts[i];
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}
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}
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return null;
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};
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/**
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* Get the index of a part or parameter.
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*
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* Indexes are linear depth-first addresses in the transclusion tree.
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*
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* @param {ve.dm.MWTransclusionPartModel|ve.dm.MWParameterModel} model Part or parameter
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* @returns {number} Page index of model
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*/
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ve.dm.MWTransclusionModel.prototype.getIndex = function ( model ) {
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var i, iLen, j, jLen, part, names,
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parts = this.parts,
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index = 0;
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for ( i = 0, iLen = parts.length; i < iLen; i++ ) {
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part = parts[i];
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if ( part === model ) {
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return index;
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}
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index++;
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if ( part instanceof ve.dm.MWTemplateModel ) {
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names = part.getParameterNames();
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for ( j = 0, jLen = names.length; j < jLen; j++ ) {
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if ( part.getParameter( names[j] ) === model ) {
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return index;
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}
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index++;
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}
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}
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}
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return -1;
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};
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}() );
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