resources/src/mediawiki/mediawiki.searchSuggest.js

   1 /*!
   2  * Add search suggestions to the search form.
   3  */
   4 ( function ( mw, $ ) {
   5         $( function () {
   6                 var api, map, searchboxesSelectors,
   7                         // Region where the suggestions box will appear directly below
   8                         // (using the same width). Can be a container element or the input
   9                         // itself, depending on what suits best in the environment.
  10                         // For Vector the suggestion box should align with the simpleSearch
  11                         // container's borders, in other skins it should align with the input
  12                         // element (not the search form, as that would leave the buttons
  13                         // vertically between the input and the suggestions).
  14                         $searchRegion = $( '#simpleSearch, #searchInput' ).first(),
  15                         $searchInput = $( '#searchInput' ),
  16                         previousSearchText = $searchInput.val();
  17
  18                 // Compatibility map
  19                 map = {
  20                         // SimpleSearch is broken in Opera < 9.6
  21                         opera: [['>=', 9.6]],
  22                         // Older Konquerors are unable to position the suggestions correctly (bug 50805)
  23                         konqueror: [['>=', '4.11']],
  24                         docomo: false,
  25                         blackberry: false,
  26                         // Support for iOS 6 or higher. It has not been tested on iOS 5 or lower
  27                         ipod: [['>=', 6]],
  28                         iphone: [['>=', 6]]
  29                 };
  30
  31                 if ( !$.client.test( map ) ) {
  32                         return;
  33                 }
  34
  35                 // Compute form data for search suggestions functionality.
  36                 function getFormData( context ) {
  37                         var $form, baseHref, linkParams;
  38
  39                         if ( !context.formData ) {
  40                                 // Compute common parameters for links' hrefs
  41                                 $form = context.config.$region.closest( 'form' );
  42
  43                                 baseHref = $form.attr( 'action' );
  44                                 baseHref += baseHref.indexOf( '?' ) > -1 ? '&' : '?';
  45
  46                                 linkParams = $form.serializeObject();
  47
  48                                 context.formData = {
  49                                         textParam: context.data.$textbox.attr( 'name' ),
  50                                         linkParams: linkParams,
  51                                         baseHref: baseHref
  52                                 };
  53                         }
  54
  55                         return context.formData;
  56                 }
  57
  58                 /**
  59                  * Callback that's run when the user changes the search input text
  60                  * 'this' is the search input box (jQuery object)
  61                  * @ignore
  62                  */
  63                 function onBeforeUpdate() {
  64                         var searchText = this.val();
  65
  66                         if ( searchText && searchText !== previousSearchText ) {
  67                                 mw.track( 'mediawiki.searchSuggest', {
  68                                         action: 'session-start'
  69                                 } );
  70                         }
  71                         previousSearchText = searchText;
  72                 }
  73
  74                 /**
  75                  * Callback that's run when suggestions have been updated either from the cache or the API
  76                  * 'this' is the search input box (jQuery object)
  77                  * @ignore
  78                  */
  79                 function onAfterUpdate() {
  80                         var context = this.data( 'suggestionsContext' );
  81
  82                         mw.track( 'mediawiki.searchSuggest', {
  83                                 action: 'impression-results',
  84                                 numberOfResults: context.config.suggestions.length,
  85                                 // FIXME: when other types of search become available change this value accordingly
  86                                 // See the API call below (opensearch = prefix)
  87                                 resultSetType: 'prefix'
  88                         } );
  89                 }
  90
  91                 // The function used to render the suggestions.
  92                 function renderFunction( text, context ) {
  93                         var formData = getFormData( context );
  94
  95                         // linkParams object is modified and reused
  96                         formData.linkParams[ formData.textParam ] = text;
  97
  98                         // this is the container <div>, jQueryfied
  99                         this.text( text )
 100                                 .wrap(
 101                                         $( '<a>' )
 102                                                 .attr( 'href', formData.baseHref + $.param( formData.linkParams ) )
 103                                                 .attr( 'title', text )
 104                                                 .addClass( 'mw-searchSuggest-link' )
 105                                 );
 106                 }
 107
 108                 // The function used when the user makes a selection
 109                 function selectFunction( $input ) {
 110                         var context = $input.data( 'suggestionsContext' ),
 111                                 text = $input.val();
 112
 113                         mw.track( 'mediawiki.searchSuggest', {
 114                                 action: 'click-result',
 115                                 numberOfResults: context.config.suggestions.length,
 116                                 clickIndex: context.config.suggestions.indexOf( text ) + 1
 117                         } );
 118
 119                         // allow the form to be submitted
 120                         return true;
 121                 }
 122
 123                 function specialRenderFunction( query, context ) {
 124                         var $el = this,
 125                                 formData = getFormData( context );
 126
 127                         // linkParams object is modified and reused
 128                         formData.linkParams[ formData.textParam ] = query;
 129
 130                         if ( $el.children().length === 0 ) {
 131                                 $el
 132                                         .append(
 133                                                 $( '<div>' )
 134                                                         .addClass( 'special-label' )
 135                                                         .text( mw.msg( 'searchsuggest-containing' ) ),
 136                                                 $( '<div>' )
 137                                                         .addClass( 'special-query' )
 138                                                         .text( query )
 139                                         )
 140                                         .show();
 141                         } else {
 142                                 $el.find( '.special-query' )
 143                                         .text( query );
 144                         }
 145
 146                         if ( $el.parent().hasClass( 'mw-searchSuggest-link' ) ) {
 147                                 $el.parent().attr( 'href', formData.baseHref + $.param( formData.linkParams ) + '&fulltext=1' );
 148                         } else {
 149                                 $el.wrap(
 150                                         $( '<a>' )
 151                                                 .attr( 'href', formData.baseHref + $.param( formData.linkParams ) + '&fulltext=1' )
 152                                                 .addClass( 'mw-searchSuggest-link' )
 153                                 );
 154                         }
 155                 }
 156
 157                 // Generic suggestions functionality for all search boxes
 158                 searchboxesSelectors = [
 159                         // Primary searchbox on every page in standard skins
 160                         '#searchInput',
 161                         // Special:Search
 162                         '#powerSearchText',
 163                         '#searchText',
 164                         // Generic selector for skins with multiple searchboxes (used by CologneBlue)
 165                         // and for MediaWiki itself (special pages with page title inputs)
 166                         '.mw-searchInput'
 167                 ];
 168                 $( searchboxesSelectors.join( ', ' ) )
 169                         .suggestions( {
 170                                 fetch: function ( query, response, maxRows ) {
 171                                         var node = this[0];
 172
 173                                         api = api || new mw.Api();
 174
 175                                         $.data( node, 'request', api.get( {
 176                                                 action: 'opensearch',
 177                                                 search: query,
 178                                                 namespace: 0,
 179                                                 limit: maxRows,
 180                                                 suggest: ''
 181                                         } ).done( function ( data ) {
 182                                                 response( data[ 1 ] );
 183                                         } ) );
 184                                 },
 185                                 cancel: function () {
 186                                         var node = this[0],
 187                                                 request = $.data( node, 'request' );
 188
 189                                         if ( request ) {
 190                                                 request.abort();
 191                                                 $.removeData( node, 'request' );
 192                                         }
 193                                 },
 194                                 result: {
 195                                         render: renderFunction,
 196                                         select: function () {
 197                                                 // allow the form to be submitted
 198                                                 return true;
 199                                         }
 200                                 },
 201                                 cache: true,
 202                                 highlightInput: true
 203                         } )
 204                         .bind( 'paste cut drop', function () {
 205                                 // make sure paste and cut events from the mouse and drag&drop events
 206                                 // trigger the keypress handler and cause the suggestions to update
 207                                 $( this ).trigger( 'keypress' );
 208                         } )
 209                         // In most skins (at least Monobook and Vector), the font-size is messed up in <body>.
 210                         // (they use 2 elements to get a sane font-height). So, instead of making exceptions for
 211                         // each skin or adding more stylesheets, just copy it from the active element so auto-fit.
 212                         .each( function () {
 213                                 var $this = $( this );
 214                                 $this
 215                                         .data( 'suggestions-context' )
 216                                         .data.$container
 217                                                 .css( 'fontSize', $this.css( 'fontSize' ) );
 218                         } );
 219
 220                 // Ensure that the thing is actually present!
 221                 if ( $searchRegion.length === 0 ) {
 222                         // Don't try to set anything up if simpleSearch is disabled sitewide.
 223                         // The loader code loads us if the option is present, even if we're
 224                         // not actually enabled (anymore).
 225                         return;
 226                 }
 227
 228                 // Special suggestions functionality and tracking for skin-provided search box
 229                 $searchInput.suggestions( {
 230                         update: {
 231                                 before: onBeforeUpdate,
 232                                 after: onAfterUpdate
 233                         },
 234                         result: {
 235                                 render: renderFunction,
 236                                 select: selectFunction
 237                         },
 238                         special: {
 239                                 render: specialRenderFunction,
 240                                 select: function ( $input ) {
 241                                         $input.closest( 'form' )
 242                                                 .append( $( '<input type="hidden" name="fulltext" value="1"/>' ) );
 243                                         return true; // allow the form to be submitted
 244                                 }
 245                         },
 246                         $region: $searchRegion
 247                 } );
 248
 249                 $searchInput.closest( 'form' )
 250                         // track the form submit event
 251                         .on( 'submit', function () {
 252                                 var context = $searchInput.data( 'suggestionsContext' );
 253                                 mw.track( 'mediawiki.searchSuggest', {
 254                                         action: 'submit-form',
 255                                         numberOfResults: context.config.suggestions.length
 256                                 } );
 257                         } )
 258                         // If the form includes any fallback fulltext search buttons, remove them
 259                         .find( '.mw-fallbackSearchButton' ).remove();
 260         } );
 261
 262 }( mediaWiki, jQuery ) );