resources/src/mediawiki.action/mediawiki.action.edit.preview.js

   1 /*!
   2  * Live edit preview.
   3  */
   4 ( function ( mw, $ ) {
   5
   6         /**
   7          * @ignore
   8          * @param {jQuery.Event} e
   9          */
  10         function doLivePreview( e ) {
  11                 var isDiff, api, request, postData, copySelectors, section,
  12                         $wikiPreview, $wikiDiff, $editform, $copyElements, $spinner, $errorBox;
  13
  14                 isDiff = ( e.target.name === 'wpDiff' );
  15                 $wikiPreview = $( '#wikiPreview' );
  16                 $wikiDiff = $( '#wikiDiff' );
  17                 $editform = $( '#editform' );
  18                 $errorBox = $( '.errorbox' );
  19                 section = $editform.find( '[name="wpSection"]' ).val();
  20
  21                 // Show changes for a new section is not yet supported
  22                 if ( isDiff && section === 'new' ) {
  23                         return;
  24                 }
  25                 e.preventDefault();
  26
  27                 // Remove any previously displayed errors
  28                 $errorBox.remove();
  29                 // Show #wikiPreview if it's hidden to be able to scroll to it
  30                 // (if it is hidden, it's also empty, so nothing changes in the rendering)
  31                 $wikiPreview.show();
  32
  33                 // Jump to where the preview will appear
  34                 $wikiPreview[0].scrollIntoView();
  35
  36                 copySelectors = [
  37                         // Main
  38                         '#firstHeading',
  39                         '#wikiPreview',
  40                         '#wikiDiff',
  41                         '#catlinks',
  42                         '#p-lang',
  43                         // Editing-related
  44                         '.templatesUsed',
  45                         '.limitreport',
  46                         '.mw-summary-preview'
  47                 ];
  48                 $copyElements = $( copySelectors.join( ',' ) );
  49
  50                 // Not shown during normal preview, to be removed if present
  51                 $( '.mw-newarticletext' ).remove();
  52
  53                 $spinner = $.createSpinner( {
  54                         size: 'large',
  55                         type: 'block'
  56                 } );
  57                 $wikiPreview.before( $spinner );
  58                 $spinner.css( {
  59                         marginTop: $spinner.height()
  60                 } );
  61
  62                 // Can't use fadeTo because it calls show(), and we might want to keep some elements hidden
  63                 // (e.g. empty #catlinks)
  64                 $copyElements.animate( { opacity: 0.4 }, 'fast' );
  65
  66                 api = new mw.Api();
  67                 postData = {
  68                         action: 'parse',
  69                         uselang: mw.config.get( 'wgUserLanguage' ),
  70                         title: mw.config.get( 'wgPageName' ),
  71                         text: $editform.find( '#wpTextbox1' ).textSelection( 'getContents' ),
  72                         summary: $editform.find( '#wpSummary' ).textSelection( 'getContents' )
  73                 };
  74
  75                 if ( section !== '' ) {
  76                         postData.sectionpreview = '';
  77                         if ( section === 'new' ) {
  78                                 postData.section = section;
  79                                 postData.sectiontitle = postData.summary;
  80                         }
  81                 }
  82
  83                 if ( isDiff ) {
  84                         $wikiPreview.hide();
  85
  86                         // First PST the input, then diff it
  87                         postData.onlypst = '';
  88                         request = api.post( postData );
  89                         request.done( function ( response ) {
  90                                 var postData;
  91                                 postData = {
  92                                         action: 'query',
  93                                         indexpageids: '',
  94                                         prop: 'revisions',
  95                                         titles: mw.config.get( 'wgPageName' ),
  96                                         rvdifftotext: response.parse.text['*'],
  97                                         rvprop: ''
  98                                 };
  99                                 if ( section !== '' ) {
 100                                         postData.rvsection = section;
 101                                 }
 102                                 return api.post( postData ).done( function ( result2 ) {
 103                                         try {
 104                                                 var diffHtml = result2.query.pages[result2.query.pageids[0]]
 105                                                         .revisions[0].diff['*'];
 106                                                 $wikiDiff.find( 'table.diff tbody' ).html( diffHtml );
 107                                         } catch ( e ) {
 108                                                 // "result.blah is undefined" error, ignore
 109                                                 mw.log.warn( e );
 110                                         }
 111                                         $wikiDiff.show();
 112                                 } );
 113                         } );
 114                 } else {
 115                         $wikiDiff.hide();
 116                         $.extend( postData, {
 117                                 pst: '',
 118                                 preview: '',
 119                                 prop: 'text|displaytitle|modules|categorieshtml|templates|langlinks|limitreporthtml',
 120                                 disableeditsection: true
 121                         } );
 122                         request = api.post( postData );
 123                         request.done( function ( response ) {
 124                                 var li, newList, $content, $parent, $list;
 125                                 if ( response.parse.modules ) {
 126                                         mw.loader.load( response.parse.modules.concat(
 127                                                 response.parse.modulescripts,
 128                                                 response.parse.modulestyles,
 129                                                 response.parse.modulemessages ) );
 130                                 }
 131                                 if ( response.parse.displaytitle ) {
 132                                         $( '#firstHeading' ).html( response.parse.displaytitle );
 133                                         document.title = mw.msg(
 134                                                 'pagetitle',
 135                                                 mw.msg(
 136                                                         mw.config.get( 'wgEditMessage', 'editing' ),
 137                                                         $( '#firstHeading' ).text()
 138                                                 )
 139                                         );
 140                                 }
 141                                 if ( response.parse.categorieshtml ) {
 142                                         $( '#catlinks' ).replaceWith( response.parse.categorieshtml['*'] );
 143                                 }
 144                                 if ( response.parse.templates ) {
 145                                         newList = [];
 146                                         $.each( response.parse.templates, function ( i, template ) {
 147                                                 li = $( '<li>' )
 148                                                         .append( $( '<a>' )
 149                                                                 .attr( {
 150                                                                         'href': mw.util.getUrl( template['*'] ),
 151                                                                         'class': ( template.exists !== undefined ? '' : 'new' )
 152                                                                 } )
 153                                                                 .text( template['*'] )
 154                                                         );
 155                                                 newList.push( li );
 156                                         } );
 157
 158                                         $editform.find( '.mw-editfooter-list' ).detach().empty().append( newList ).appendTo( '.templatesUsed' );
 159                                 }
 160                                 if ( response.parse.limitreporthtml ) {
 161                                         $( '.limitreport' ).html( response.parse.limitreporthtml['*'] );
 162                                 }
 163                                 if ( response.parse.langlinks && mw.config.get( 'skin' ) === 'vector' ) {
 164                                         newList = [];
 165                                         $.each( response.parse.langlinks, function ( i, langlink ) {
 166                                                 li = $( '<li>' )
 167                                                         .addClass( 'interlanguage-link interwiki-' + langlink.lang )
 168                                                         .append( $( '<a>' )
 169                                                                 .attr( {
 170                                                                         'href': langlink.url,
 171                                                                         'title': langlink['*'] + ' - ' + langlink.langname,
 172                                                                         'lang': langlink.lang,
 173                                                                         'hreflang': langlink.lang
 174                                                                 } )
 175                                                                 .text( langlink.autonym )
 176                                                         );
 177                                                 newList.push( li );
 178                                         } );
 179                                         $list = $( '#p-lang ul' );
 180                                         $parent = $list.parent();
 181                                         $list.detach().empty().append( newList ).prependTo( $parent );
 182                                 }
 183
 184                                 if ( response.parse.text['*'] ) {
 185                                         $content = $wikiPreview.children( '.mw-content-ltr,.mw-content-rtl' );
 186                                         $content
 187                                                 .detach()
 188                                                 .html( response.parse.text['*'] );
 189
 190                                         mw.hook( 'wikipage.content' ).fire( $content );
 191
 192                                         // Reattach
 193                                         $wikiPreview.append( $content );
 194
 195                                         $wikiPreview.show();
 196
 197                                 }
 198                         } );
 199                 }
 200                 request.done( function ( response ) {
 201                         var isSubject = ( section === 'new' ),
 202                                 summaryMsg = isSubject ? 'subject-preview' : 'summary-preview';
 203                         if ( response.parse.parsedsummary ) {
 204                                 $editform.find( '.mw-summary-preview' )
 205                                         .empty()
 206                                         .append(
 207                                                 mw.message( summaryMsg ).parse(),
 208                                                 ' ',
 209                                                 $( '<span>' ).addClass( 'comment' ).html(
 210                                                         // There is no equivalent to rawParams
 211                                                         mw.message( 'parentheses' ).escaped()
 212                                                                 .replace( '$1', response.parse.parsedsummary['*'] )
 213                                                 )
 214                                         );
 215                         }
 216                 } );
 217                 request.always( function () {
 218                         $spinner.remove();
 219                         $copyElements.animate( {
 220                                 opacity: 1
 221                         }, 'fast' );
 222                 } );
 223                 request.fail( function ( code, result ) {
 224                         var errorMsg = 'API error: ' +  code;
 225                         if ( code === 'http' ) {
 226                                 errorMsg = 'HTTP error: ';
 227                                 if ( result.exception ) {
 228                                         errorMsg += result.exception;
 229                                 } else {
 230                                         errorMsg += result.textStatus;
 231                                 }
 232                         }
 233                         $errorBox = $( '<div>' )
 234                                 .addClass( 'errorbox' )
 235                                 .html( '<strong>' + mw.message( 'previewerrortext' ).escaped() + '</strong><br>' )
 236                                 .append( document.createTextNode( errorMsg ) );
 237                         $wikiDiff.hide();
 238                         $wikiPreview.hide().before( $errorBox );
 239                 } );
 240         }
 241
 242         $( function () {
 243                 // Do not enable on user .js/.css pages, as there's no sane way of "previewing"
 244                 // the scripts or styles without reloading the page.
 245                 // Do not enable for ProofreadPage Index page editors, which have no textbox
 246                 if ( $( '#mw-userjsyoucanpreview' ).length || $( '#mw-usercssyoucanpreview' ).length || $( '#wpTextbox1' ).length === 0 ) {
 247                         return;
 248                 }
 249
 250                 // The following elements can change in a preview but are not output
 251                 // by the server when they're empty until the preview response.
 252                 // TODO: Make the server output these always (in a hidden state), so we don't
 253                 // have to fish and (hopefully) put them in the right place (since skins
 254                 // can change where they are output).
 255
 256                 if ( !document.getElementById( 'p-lang' ) && document.getElementById( 'p-tb' ) && mw.config.get( 'skin' ) === 'vector' ) {
 257                         $( '.portal:last' ).after(
 258                                 $( '<div>' ).attr( {
 259                                         'class': 'portal',
 260                                         'id': 'p-lang',
 261                                         'role': 'navigation',
 262                                         'title': mw.msg( 'tooltip-p-lang' ),
 263                                         'aria-labelledby': 'p-lang-label'
 264                                 } )
 265                                 .append( $( '<h3>' ).attr( 'id', 'p-lang-label' ).text( mw.msg( 'otherlanguages' ) ) )
 266                                 .append( $( '<div>' ).addClass( 'body' ).append( '<ul>' ) )
 267                         );
 268                 }
 269
 270                 if ( !$( '.mw-summary-preview' ).length ) {
 271                         $( '#wpSummary' ).after(
 272                                 $( '<div>' ).addClass( 'mw-summary-preview' )
 273                         );
 274                 }
 275
 276                 if ( !document.getElementById( 'wikiDiff' ) && document.getElementById( 'wikiPreview' ) ) {
 277                         $( '#wikiPreview' ).after(
 278                                 $( '<div>' )
 279                                         .hide()
 280                                         .attr( 'id', 'wikiDiff' )
 281                                         .html( '<table class="diff"><col class="diff-marker"/><col class="diff-content"/>' +
 282                                                 '<col class="diff-marker"/><col class="diff-content"/><tbody/></table>' )
 283                         );
 284                 }
 285
 286                 // This should be moved down to '#editform', but is kept on the body for now
 287                 // because the LiquidThreads extension is re-using this module with only half
 288                 // the EditPage (doesn't include #editform presumably, bug 55463).
 289                 $( document.body ).on( 'click', '#wpPreview, #wpDiff', doLivePreview );
 290         } );
 291
 292 }( mediaWiki, jQuery ) );