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/** * Fetch and display a preview of the current editing area. * * Usage: * * var preview = require( 'mediawiki.page.preview' ); * preview.doPreview(); * * @class mw.plugin.page.preview * @singleton */ ( function () { var api = new mw.Api(); /** * Show the edit summary. * * @private * @param {jQuery} $formNode * @param {Object} response */ function showEditSummary( $formNode, response ) { var $summaryPreview = $formNode.find( '.mw-summary-preview' ).empty(); var parse = response.parse; if ( !parse || !parse.parsedsummary ) { return; } $summaryPreview.append( mw.message( 'summary-preview' ).parse(), ' ', $( '<span>' ).addClass( 'comment' ).html( // There is no equivalent to rawParams mw.message( 'parentheses' ).escaped() // .replace() use $ as start of a pattern. // $$ is the pattern for '$'. // The inner .replace() duplicates any $ and // the outer .replace() simplifies the $$. .replace( '$1', parse.parsedsummary.replace( /\$/g, '$$$$' ) ) ) ); } /** * Show status indicators. * * @private * @param {Array} indicators */ function showIndicators( indicators ) { // eslint-disable-next-line no-jquery/no-map-util indicators = $.map( indicators, function ( indicator, name ) { return $( '<div>' ) .addClass( 'mw-indicator' ) .attr( 'id', mw.util.escapeIdForAttribute( 'mw-indicator-' + name ) ) .html( indicator ) .get( 0 ); } ); if ( indicators.length ) { mw.hook( 'wikipage.indicators' ).fire( $( indicators ) ); } // Add whitespace between the <div>s because // they get displayed with display: inline-block var newList = []; indicators.forEach( function ( indicator ) { newList.push( indicator, document.createTextNode( '\n' ) ); } ); $( '.mw-indicators' ).empty().append( newList ); } /** * Show the templates used. * * @private * @param {Array} templates */ function showTemplates( templates ) { var newList = templates.map( function ( template ) { return $( '<li>' ).append( $( '<a>' ) .addClass( template.exists ? '' : 'new' ) .attr( 'href', mw.util.getUrl( template.title ) ) .text( template.title ) ); } ); var $parent = $( '.templatesUsed' ); if ( newList.length ) { var $list = $parent.find( 'ul' ); if ( $list.length ) { $list.detach().empty(); } else { $( '<div>' ) .addClass( 'mw-templatesUsedExplanation' ) .append( '<p>' ) .appendTo( $parent ); $list = $( '<ul>' ); } // Add "Templates used in this preview" or replace // "Templates used on this page" with it $( '.mw-templatesUsedExplanation > p' ) .msg( 'templatesusedpreview', newList.length ); $list.append( newList ).appendTo( $parent ); } else { $parent.empty(); } } /** * Show the language links (Vector-specific). * TODO: Doesn't work in vector-2022 (maybe it doesn't need to?) * * @private * @param {Array} langLinks */ function showLanguageLinks( langLinks ) { var newList = langLinks.map( function ( langLink ) { var bcp47 = mw.language.bcp47( langLink.lang ); // eslint-disable-next-line mediawiki/class-doc return $( '<li>' ) .addClass( 'interlanguage-link interwiki-' + langLink.lang ) .append( $( '<a>' ) .attr( { href: langLink.url, title: langLink.title + ' - ' + langLink.langname, lang: bcp47, hreflang: bcp47 } ) .text( langLink.autonym ) ); } ); var $list = $( '#p-lang ul' ), $parent = $list.parent(); $list.detach().empty().append( newList ).prependTo( $parent ); } /** * Update the various bits of the page based on the response. * * @private * @param {Object} config * @param {Object} response */ function parseResponse( config, response ) { var $content; // Js config variables and modules. if ( response.parse.jsconfigvars ) { mw.config.set( response.parse.jsconfigvars ); } if ( response.parse.modules ) { mw.loader.load( response.parse.modules.concat( response.parse.modulestyles ) ); } // Indicators. showIndicators( response.parse.indicators ); // Display title. if ( response.parse.displaytitle ) { $( '#firstHeadingTitle' ).html( response.parse.displaytitle ); } // Categories. if ( response.parse.categorieshtml ) { $content = $( $.parseHTML( response.parse.categorieshtml ) ); mw.hook( 'wikipage.categories' ).fire( $content ); $( '.catlinks[data-mw="interface"]' ).replaceWith( $content ); } // Table of contents. if ( response.parse.sections ) { mw.hook( 'wikipage.tableOfContents' ).fire( response.parse.hidetoc ? [] : response.parse.sections ); } // Templates. if ( response.parse.templates ) { showTemplates( response.parse.templates ); } // Limit report. if ( response.parse.limitreporthtml ) { $( '.limitreport' ).html( response.parse.limitreporthtml ) .find( '.mw-collapsible' ).makeCollapsible(); } // Language links. if ( response.parse.langlinks && mw.config.get( 'skin' ) === 'vector' ) { showLanguageLinks( response.parse.langlinks ); } if ( !response.parse.text ) { return; } // Remove preview note, if present (added by Live Preview, etc.). config.$previewNode.find( '.previewnote' ).remove(); $content = config.$previewNode.children( '.mw-content-ltr,.mw-content-rtl' ); if ( !$content.length ) { var dir = $( 'html' ).attr( 'dir' ); $content = $( '<div>' ) .attr( 'lang', mw.config.get( 'wgContentLanguage' ) ) .attr( 'dir', dir ) // The following classes are used here: // * mw-content-ltr // * mw-content-rtl .addClass( 'mw-content-' + dir ); } $content .detach() .html( response.parse.text ); mw.hook( 'wikipage.content' ).fire( $content ); // Reattach. config.$previewNode.append( $content ); config.$previewNode.show(); } /** * Get the unresolved promise of the preview request. * * @private * @param {Object} config * @param {string|number} section * @return {jQuery.Promise} */ function getParseRequest( config, section ) { var params = { formatversion: 2, action: 'parse', title: config.title, summary: config.summary, prop: '' }; if ( !config.showDiff ) { $.extend( params, { prop: 'text|indicators|displaytitle|modules|jsconfigvars|categorieshtml|sections|templates|langlinks|limitreporthtml|parsewarningshtml', text: config.$textareaNode.textSelection( 'getContents' ), pst: true, preview: true, sectionpreview: section !== '', disableeditsection: true, useskin: mw.config.get( 'skin' ), uselang: mw.config.get( 'wgUserLanguage' ) } ); if ( mw.config.get( 'wgUserVariant' ) ) { params.variant = mw.config.get( 'wgUserVariant' ); } if ( section === 'new' ) { params.section = 'new'; params.sectiontitle = params.summary; delete params.summary; } } return api.post( params ); } /** * Get the unresolved promise of the diff view request. * * @private * @param {Object} config * @param {Object} response */ function parseDiffResponse( config, response ) { var diff = response.compare.bodies; if ( diff.main ) { config.$diffNode.find( 'table.diff tbody' ).html( diff.main ); mw.hook( 'wikipage.diff' ).fire( config.$diffNode.find( 'table.diff' ) ); } else { // The diff is empty. var $tableCell = $( '<td>' ) .attr( 'colspan', 4 ) .addClass( 'diff-notice' ) .append( $( '<div>' ) .addClass( 'mw-diff-empty' ) .text( mw.msg( 'diff-empty' ) ) ); config.$diffNode.find( 'table.diff tbody' ) .empty() .append( $( '<tr>' ).append( $tableCell ) ); } config.$diffNode.show(); } /** * Get the selectors of elements that should be grayed out while the preview is being generated. * * @return {string[]} */ function getLoadingSelectors() { return [ // Main '.mw-indicators', '#firstHeading', '#wikiPreview', '#wikiDiff', '#catlinks', '#p-lang', // Editing-related '.templatesUsed', '.limitreport', '.mw-summary-preview' ]; } /** * Fetch and display a preview of the current editing area. * * @param {Object} config Configuration options. * @param {jQuery} [config.$previewNode=$( '#wikiPreview' )] Where the preview should be displayed. * @param {jQuery} [config.$diffNode=$( '#wikiDiff' )] Where diffs should be displayed (if showDiff is set). * @param {jQuery} [config.$formNode=$( '#editform' )] The form node. * @param {jQuery} [config.$textareaNode=$( '#wpTextbox1' )] The edit form's textarea. * @param {jQuery} [config.$spinnerNode=$( '.mw-spinner-preview' )] The loading indicator. This will * be shown/hidden accordingly while waiting for the XMLHttpRequest to complete. * Ignored if no $spinnerNode is given. * @param {string} [config.summary=null] The edit summary. If no value is given, the summary is * fetched from `$( '#wpSummaryWidget' )`. * @param {boolean} [config.showDiff=false] Shows a diff in the preview area instead of the content. * @param {string} [config.title=mw.config.get( 'wgPageName' )] The title of the page being previewed * @param {Array} [config.loadingSelectors=getLoadingSelectors()] An array of query selectors * (i.e. '#catlinks') that should be grayed out while the preview is being generated. * @return {jQuery.Promise} */ function doPreview( config ) { config = $.extend( { $previewNode: $( '#wikiPreview' ), $diffNode: $( '#wikiDiff' ), $formNode: $( '#editform' ), $textareaNode: $( '#wpTextbox1' ), $spinnerNode: $( '.mw-spinner-preview' ), summary: null, showDiff: false, title: mw.config.get( 'wgPageName' ), loadingSelectors: getLoadingSelectors() }, config ); var section = config.$formNode.find( '[name="wpSection"]' ).val(); if ( !config.$textareaNode || config.$textareaNode.length === 0 ) { return; } // Fetch edit summary, if not already given. if ( !config.summary ) { var $summaryWidget = $( '#wpSummaryWidget' ); if ( $summaryWidget.length ) { config.summary = OO.ui.infuse( $summaryWidget ).getValue(); } } // Show the spinner if it exists. if ( config.$spinnerNode && config.$spinnerNode.length ) { config.$spinnerNode.show(); } // Gray out the 'copy elements' while we wait for a response. var $loadingElements = $( config.loadingSelectors.join( ',' ) ); $loadingElements.addClass( [ 'mw-preview-loading-elements', 'mw-preview-loading-elements-loading' ] ); var parseRequest = getParseRequest( config, section ), diffRequest; if ( config.showDiff ) { config.$previewNode.hide(); // Hide the table of contents, in case it was previously shown after previewing. mw.hook( 'wikipage.tableOfContents' ).fire( [] ); var diffPar = { action: 'compare', fromtitle: config.title, totitle: config.title, toslots: 'main', // Remove trailing whitespace for consistency with EditPage diffs. // TODO trimEnd() when we can use that. 'totext-main': config.$textareaNode.textSelection( 'getContents' ).replace( /\s+$/, '' ), 'tocontentmodel-main': mw.config.get( 'wgPageContentModel' ), topst: true, slots: 'main', uselang: mw.config.get( 'wgUserLanguage' ) }; if ( mw.config.get( 'wgUserVariant' ) ) { diffPar.variant = mw.config.get( 'wgUserVariant' ); } if ( section ) { diffPar[ 'tosection-main' ] = section; } if ( mw.config.get( 'wgArticleId' ) === 0 ) { diffPar.fromslots = 'main'; diffPar[ 'fromcontentmodel-main' ] = mw.config.get( 'wgPageContentModel' ); diffPar[ 'fromtext-main' ] = ''; } diffRequest = api.post( diffPar ); } else if ( config.$diffNode ) { config.$diffNode.hide(); } return $.when( parseRequest, diffRequest ) .done( function ( response, diffResponse ) { showEditSummary( config.$formNode, response[ 0 ] ); if ( config.showDiff ) { parseDiffResponse( config, diffResponse[ 0 ] ); } else { parseResponse( config, response[ 0 ] ); } mw.hook( 'wikipage.editform' ).fire( config.$formNode ); } ) .always( function () { if ( config.$spinnerNode && config.$spinnerNode.length ) { config.$spinnerNode.hide(); } $loadingElements.removeClass( 'mw-preview-loading-elements-loading' ); } ); } // Expose public methods. module.exports = { doPreview: doPreview, getLoadingSelectors: getLoadingSelectors }; }() );
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