mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 10:35:48 +00:00
0a7a845a42
Change-Id: I0b299c840ede1a1b8552cecfc70c5760ab036181
100 lines
4 KiB
JavaScript
100 lines
4 KiB
JavaScript
/*!
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* VisualEditor MediaWiki DiffLoader.
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*
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* @copyright 2011-2018 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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* Diff loader.
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*
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* @class mw.libs.ve.diffLoader
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* @singleton
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*/
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( function () {
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var revCache = {};
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mw.libs.ve = mw.libs.ve || {};
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mw.libs.ve.diffLoader = {
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/**
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* Get a ve.dm.Document model from a Parsoid response
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*
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* @param {Object} response Parsoid response from the VisualEditor API
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* @return {ve.dm.Document|null} Document, or null if an invalid response
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*/
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getModelFromResponse: function ( response ) {
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var doc,
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targetClass = ve.init.mw.DesktopArticleTarget,
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metadataIdRegExp = ve.init.platform.getMetadataIdRegExp(),
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data = response ? ( response.visualeditor || response.visualeditoredit ) : null;
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if ( data && typeof data.content === 'string' ) {
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doc = targetClass.static.parseDocument( data.content, 'visual' );
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// Strip RESTBase IDs
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Array.prototype.forEach.call( doc.querySelectorAll( '[id^="mw"]' ), function ( element ) {
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if ( element.id.match( metadataIdRegExp ) ) {
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element.removeAttribute( 'id' );
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}
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} );
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return targetClass.static.createModelFromDom( doc, 'visual' );
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}
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return null;
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},
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/**
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* Fetch a specific revision from Parsoid as a DM document, and cache in memory
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*
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* @param {number} revId Revision ID
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* @param {string} [pageName] Page name, defaults to wgRelevantPageName
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* @param {jQuery.Promise} [parseDocumentModulePromise] Promise which resolves when Target#parseDocument is available
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* @return {jQuery.Promise} Promise which resolves with a document model
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*/
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fetchRevision: function ( revId, pageName, parseDocumentModulePromise ) {
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parseDocumentModulePromise = parseDocumentModulePromise || $.Deferred().resolve().promise();
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pageName = pageName || mw.config.get( 'wgRelevantPageName' );
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revCache[ pageName ] = revCache[ pageName ] || {};
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revCache[ pageName ][ revId ] =
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revCache[ pageName ][ revId ] ||
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mw.libs.ve.targetLoader.requestParsoidData( pageName, { oldId: revId, targetName: 'diff' } ).then( function ( response ) {
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return parseDocumentModulePromise.then( function () {
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return mw.libs.ve.diffLoader.getModelFromResponse( response );
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} );
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} );
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return revCache[ pageName ][ revId ];
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},
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/**
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* Get a visual diff generator promise
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*
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* @param {number|jQuery.Promise} oldIdOrPromise Old revision ID, or document model promise
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* @param {number|jQuery.Promise} newIdOrPromise New revision ID, or document model promise
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* @param {jQuery.Promise} [parseDocumentModulePromise] Promise which resolves when Target#parseDocument is available
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* @param {string} [oldPageName] Old revision's page name, defaults to wgRelevantPageName
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* @param {string} [newPageName] New revision's page name, defaults to oldPageName
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* @return {jQuery.Promise} Promise which resolves with a ve.dm.VisualDiff generator function
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*/
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getVisualDiffGeneratorPromise: function ( oldIdOrPromise, newIdOrPromise, parseDocumentModulePromise, oldPageName, newPageName ) {
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var oldRevPromise, newRevPromise;
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parseDocumentModulePromise = parseDocumentModulePromise || $.Deferred().resolve().promise();
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oldPageName = oldPageName || mw.config.get( 'wgRelevantPageName' );
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oldRevPromise = typeof oldIdOrPromise === 'number' ? this.fetchRevision( oldIdOrPromise, oldPageName, parseDocumentModulePromise ) : oldIdOrPromise;
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newRevPromise = typeof newIdOrPromise === 'number' ? this.fetchRevision( newIdOrPromise, newPageName, parseDocumentModulePromise ) : newIdOrPromise;
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return $.when( oldRevPromise, newRevPromise, parseDocumentModulePromise ).then( function ( oldDoc, newDoc ) {
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// TODO: Differ expects newDoc to be derived from oldDoc and contain all its store data.
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// We may want to remove that assumption from the differ?
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newDoc.getStore().merge( oldDoc.getStore() );
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return function () {
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return new ve.dm.VisualDiff( oldDoc, newDoc );
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};
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} );
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}
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};
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}() );
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