resources/mediawiki.page/mediawiki.page.mwsuggest.js

   1 jQuery( document ).ready( function( $ ) {
   2         var $container = $( '<div>', { 'class' : 'open-search-suggestions' } ),
   3                 cache = {},
   4                 $suggestionList,
   5                 url = mw.util.wikiScript( 'api' ),
   6                 maxRowWindow;
   7
   8         //Append the container which will hold the menu to the body
   9         $( 'body' ).append( $container );
  10
  11         /* Grabs namespaces from search form or
  12          * in case we're not on a search page, take it from wgSearchNamespaces.
  13          * @return Array: List of Namespaces that should be searched
  14          */
  15         var getNamespaces = function() {
  16                 var namespaces = [];
  17                 $( 'form#powersearch, form#search' ).find( '[name^="ns"]' ).each(function() {
  18                         if ( this.checked || ( this.type == 'hidden' && this.value == '1' ) ) {
  19                                 namespaces.push( this.name.substring( 2 ) );
  20                         }
  21                 });
  22                 if ( !namespaces.length ) {
  23                         namespaces = mw.config.get( 'wgSearchNamespaces' );
  24                 }
  25                 return namespaces.join('|');
  26         };
  27
  28         /* Helper function to make sure that the list doesn't expand below the visible part of the window */
  29         var deliverResult = function( obj, response ) {
  30                 if ( obj && obj.length > 1 ) {
  31                         response( obj[1] );
  32                         // Get the lowest from multiple numbers using fn.apply
  33                         var maxRow = Math.min.apply( Math, [7, obj[1].length, maxRowWindow] );
  34                         $suggestionList.css( 'height', maxRow * $suggestionList.find( '.ui-menu-item' ).eq( 0 ).height() );
  35                 } else {
  36                         response( [] );
  37                 }
  38         };
  39
  40         /* The actual autocomplete setup */
  41         $( "#searchInput" ).autocomplete({
  42                 minLength: 2,
  43                 source: function ( request, response ) {
  44                         var namespaces = getNamespaces();
  45                         // We're caching queries for performance
  46                         var term = request.term + namespaces;
  47                         if ( term in cache ) {
  48                                 deliverResult( cache[term], response );
  49                                 return;
  50                         }
  51                         var params = {
  52                                 format : 'json',
  53                                 action : 'opensearch',
  54                                 search : request.term,
  55                                 namespace : namespaces
  56                         };
  57                         $.getJSON( url, params, function ( obj ) {
  58                                 // Save to cache
  59                                 cache[ term ] = obj;
  60                                 deliverResult( obj, response );
  61                         });
  62                 },
  63                 select : function() {
  64                         $( '#searchGoButton' ).click();
  65                 },
  66                 create : function() {
  67                         $suggestionList = $container.find( 'ul' );
  68                 },
  69                 appendTo : '.open-search-suggestions',
  70                 open : function() {
  71                         maxRowWindow = Math.floor(
  72                                 ( $( window ).height() - $suggestionList.offset().top + $( window ).scrollTop() ) /
  73                                         $suggestionList.find( '.ui-menu-item' ).eq( 0 ).height()
  74                         );
  75                 }
  76         });
  77
  78         /* Legacy teardown, called when things like SimpleSearch need to disable MWSuggest */
  79         window.os_MWSuggestDisable = function() {
  80                 return $("#searchInput").autocomplete( "destroy" );
  81         };
  82 });