resources/src/mediawiki/mediawiki.searchSuggest.js

   1 /*!
   2  * Add search suggestions to the search form.
   3  */
   4 ( function ( mw, $ ) {
   5         mw.searchSuggest = {
   6                 // queries the wiki and calls response with the result
   7                 request: function ( api, query, response, maxRows, namespace ) {
   8                         return api.get( {
   9                                 formatversion: 2,
  10                                 action: 'opensearch',
  11                                 search: query,
  12                                 namespace: namespace || 0,
  13                                 limit: maxRows,
  14                                 suggest: true
  15                         } ).done( function ( data, jqXHR ) {
  16                                 response( data[ 1 ], {
  17                                         type: jqXHR.getResponseHeader( 'X-OpenSearch-Type' ),
  18                                         query: query
  19                                 } );
  20                         } );
  21                 }
  22         };
  23
  24         $( function () {
  25                 var api, searchboxesSelectors,
  26                         // Region where the suggestions box will appear directly below
  27                         // (using the same width). Can be a container element or the input
  28                         // itself, depending on what suits best in the environment.
  29                         // For Vector the suggestion box should align with the simpleSearch
  30                         // container's borders, in other skins it should align with the input
  31                         // element (not the search form, as that would leave the buttons
  32                         // vertically between the input and the suggestions).
  33                         $searchRegion = $( '#simpleSearch, #searchInput' ).first(),
  34                         $searchInput = $( '#searchInput' ),
  35                         previousSearchText = $searchInput.val();
  36
  37                 // Compute form data for search suggestions functionality.
  38                 function getFormData( context ) {
  39                         var $form, baseHref, linkParams;
  40
  41                         if ( !context.formData ) {
  42                                 // Compute common parameters for links' hrefs
  43                                 $form = context.config.$region.closest( 'form' );
  44
  45                                 baseHref = $form.attr( 'action' );
  46                                 baseHref += baseHref.indexOf( '?' ) > -1 ? '&' : '?';
  47
  48                                 linkParams = $form.serializeObject();
  49
  50                                 context.formData = {
  51                                         textParam: context.data.$textbox.attr( 'name' ),
  52                                         linkParams: linkParams,
  53                                         baseHref: baseHref
  54                                 };
  55                         }
  56
  57                         return context.formData;
  58                 }
  59
  60                 /**
  61                  * Callback that's run when the user changes the search input text
  62                  * 'this' is the search input box (jQuery object)
  63                  *
  64                  * @ignore
  65                  */
  66                 function onBeforeUpdate() {
  67                         var searchText = this.val();
  68
  69                         if ( searchText && searchText !== previousSearchText ) {
  70                                 mw.track( 'mediawiki.searchSuggest', {
  71                                         action: 'session-start'
  72                                 } );
  73                         }
  74                         previousSearchText = searchText;
  75                 }
  76
  77                 /**
  78                  * Defines the location of autocomplete. Typically either
  79                  * header, which is in the top right of vector (for example)
  80                  * and content which identifies the main search bar on
  81                  * Special:Search. Defaults to header for skins that don't set
  82                  * explicitly.
  83                  *
  84                  * @ignore
  85                  * @param {Object} context
  86                  * @return {string}
  87                  */
  88                 function getInputLocation( context ) {
  89                         return context.config.$region
  90                                         .closest( 'form' )
  91                                         .find( '[data-search-loc]' )
  92                                         .data( 'search-loc' ) || 'header';
  93                 }
  94
  95                 /**
  96                  * Callback that's run when suggestions have been updated either from the cache or the API
  97                  * 'this' is the search input box (jQuery object)
  98                  *
  99                  * @ignore
 100                  * @param {Object} metadata
 101                  */
 102                 function onAfterUpdate( metadata ) {
 103                         var context = this.data( 'suggestionsContext' );
 104
 105                         mw.track( 'mediawiki.searchSuggest', {
 106                                 action: 'impression-results',
 107                                 numberOfResults: context.config.suggestions.length,
 108                                 resultSetType: metadata.type || 'unknown',
 109                                 query: metadata.query,
 110                                 inputLocation: getInputLocation( context )
 111                         } );
 112                 }
 113
 114                 // The function used to render the suggestions.
 115                 function renderFunction( text, context ) {
 116                         var formData = getFormData( context ),
 117                                 textboxConfig = context.data.$textbox.data( 'mw-searchsuggest' ) || {};
 118
 119                         // linkParams object is modified and reused
 120                         formData.linkParams[ formData.textParam ] = text;
 121
 122                         // Allow trackers to attach tracking information, such
 123                         // as wprov, to clicked links.
 124                         mw.track( 'mediawiki.searchSuggest', {
 125                                 action: 'render-one',
 126                                 formData: formData,
 127                                 index: context.config.suggestions.indexOf( text )
 128                         } );
 129
 130                         // this is the container <div>, jQueryfied
 131                         this.text( text );
 132
 133                         // wrap only as link, if the config doesn't disallow it
 134                         if ( textboxConfig.wrapAsLink !== false ) {
 135                                 this.wrap(
 136                                         $( '<a>' )
 137                                                 .attr( 'href', formData.baseHref + $.param( formData.linkParams ) )
 138                                                 .attr( 'title', text )
 139                                                 .addClass( 'mw-searchSuggest-link' )
 140                                 );
 141                         }
 142                 }
 143
 144                 // The function used when the user makes a selection
 145                 function selectFunction( $input, source ) {
 146                         var context = $input.data( 'suggestionsContext' ),
 147                                 text = $input.val();
 148
 149                         // Selecting via keyboard triggers a form submission. That will fire
 150                         // the submit-form event in addition to this click-result event.
 151                         if ( source !== 'keyboard' ) {
 152                                 mw.track( 'mediawiki.searchSuggest', {
 153                                         action: 'click-result',
 154                                         numberOfResults: context.config.suggestions.length,
 155                                         index: context.config.suggestions.indexOf( text )
 156                                 } );
 157                         }
 158
 159                         // allow the form to be submitted
 160                         return true;
 161                 }
 162
 163                 function specialRenderFunction( query, context ) {
 164                         var $el = this,
 165                                 formData = getFormData( context );
 166
 167                         // linkParams object is modified and reused
 168                         formData.linkParams[ formData.textParam ] = query;
 169
 170                         mw.track( 'mediawiki.searchSuggest', {
 171                                 action: 'render-one',
 172                                 formData: formData,
 173                                 index: context.config.suggestions.indexOf( query )
 174                         } );
 175
 176                         if ( $el.children().length === 0 ) {
 177                                 $el
 178                                         .append(
 179                                                 $( '<div>' )
 180                                                         .addClass( 'special-label' )
 181                                                         .text( mw.msg( 'searchsuggest-containing' ) ),
 182                                                 $( '<div>' )
 183                                                         .addClass( 'special-query' )
 184                                                         .text( query )
 185                                         )
 186                                         .show();
 187                         } else {
 188                                 $el.find( '.special-query' )
 189                                         .text( query );
 190                         }
 191
 192                         if ( $el.parent().hasClass( 'mw-searchSuggest-link' ) ) {
 193                                 $el.parent().attr( 'href', formData.baseHref + $.param( formData.linkParams ) + '&fulltext=1' );
 194                         } else {
 195                                 $el.wrap(
 196                                         $( '<a>' )
 197                                                 .attr( 'href', formData.baseHref + $.param( formData.linkParams ) + '&fulltext=1' )
 198                                                 .addClass( 'mw-searchSuggest-link' )
 199                                 );
 200                         }
 201                 }
 202
 203                 // Generic suggestions functionality for all search boxes
 204                 searchboxesSelectors = [
 205                         // Primary searchbox on every page in standard skins
 206                         '#searchInput',
 207                         // Generic selector for skins with multiple searchboxes (used by CologneBlue)
 208                         // and for MediaWiki itself (special pages with page title inputs)
 209                         '.mw-searchInput'
 210                 ];
 211                 $( searchboxesSelectors.join( ', ' ) )
 212                         .suggestions( {
 213                                 fetch: function ( query, response, maxRows ) {
 214                                         var node = this[ 0 ];
 215
 216                                         api = api || new mw.Api();
 217
 218                                         $.data( node, 'request', mw.searchSuggest.request( api, query, response, maxRows ) );
 219                                 },
 220                                 cancel: function () {
 221                                         var node = this[ 0 ],
 222                                                 request = $.data( node, 'request' );
 223
 224                                         if ( request ) {
 225                                                 request.abort();
 226                                                 $.removeData( node, 'request' );
 227                                         }
 228                                 },
 229                                 result: {
 230                                         render: renderFunction,
 231                                         select: function () {
 232                                                 // allow the form to be submitted
 233                                                 return true;
 234                                         }
 235                                 },
 236                                 update: {
 237                                         before: onBeforeUpdate,
 238                                         after: onAfterUpdate
 239                                 },
 240                                 cache: true,
 241                                 highlightInput: true
 242                         } )
 243                         .on( 'paste cut drop', function () {
 244                                 // make sure paste and cut events from the mouse and drag&drop events
 245                                 // trigger the keypress handler and cause the suggestions to update
 246                                 $( this ).trigger( 'keypress' );
 247                         } )
 248                         // In most skins (at least Monobook and Vector), the font-size is messed up in <body>.
 249                         // (they use 2 elements to get a sane font-height). So, instead of making exceptions for
 250                         // each skin or adding more stylesheets, just copy it from the active element so auto-fit.
 251                         .each( function () {
 252                                 var $this = $( this );
 253                                 $this
 254                                         .data( 'suggestions-context' )
 255                                         .data.$container
 256                                                 .css( 'fontSize', $this.css( 'fontSize' ) );
 257                         } );
 258
 259                 // Ensure that the thing is actually present!
 260                 if ( $searchRegion.length === 0 ) {
 261                         // Don't try to set anything up if simpleSearch is disabled sitewide.
 262                         // The loader code loads us if the option is present, even if we're
 263                         // not actually enabled (anymore).
 264                         return;
 265                 }
 266
 267                 // Special suggestions functionality and tracking for skin-provided search box
 268                 $searchInput.suggestions( {
 269                         update: {
 270                                 before: onBeforeUpdate,
 271                                 after: onAfterUpdate
 272                         },
 273                         result: {
 274                                 render: renderFunction,
 275                                 select: selectFunction
 276                         },
 277                         special: {
 278                                 render: specialRenderFunction,
 279                                 select: function ( $input, source ) {
 280                                         var context = $input.data( 'suggestionsContext' ),
 281                                                 text = $input.val();
 282                                         if ( source === 'mouse' ) {
 283                                                 // mouse click won't trigger form submission, so we need to send a click event
 284                                                 mw.track( 'mediawiki.searchSuggest', {
 285                                                         action: 'click-result',
 286                                                         numberOfResults: context.config.suggestions.length,
 287                                                         index: context.config.suggestions.indexOf( text )
 288                                                 } );
 289                                         } else {
 290                                                 $input.closest( 'form' )
 291                                                         .append( $( '<input type="hidden" name="fulltext" value="1"/>' ) );
 292                                         }
 293                                         return true; // allow the form to be submitted
 294                                 }
 295                         },
 296                         $region: $searchRegion
 297                 } );
 298
 299                 $searchInput.closest( 'form' )
 300                         // track the form submit event
 301                         .on( 'submit', function () {
 302                                 var context = $searchInput.data( 'suggestionsContext' );
 303                                 mw.track( 'mediawiki.searchSuggest', {
 304                                         action: 'submit-form',
 305                                         numberOfResults: context.config.suggestions.length,
 306                                         $form: context.config.$region.closest( 'form' ),
 307                                         inputLocation: getInputLocation( context ),
 308                                         index: context.config.suggestions.indexOf(
 309                                                 context.data.$textbox.val()
 310                                         )
 311                                 } );
 312                         } )
 313                         // If the form includes any fallback fulltext search buttons, remove them
 314                         .find( '.mw-fallbackSearchButton' ).remove();
 315         } );
 316
 317 }( mediaWiki, jQuery ) );