resources/jquery/jquery.suggestions.js

   1 /**
   2  * This plugin provides a generic way to add suggestions to a text box.
   3  *
   4  * Usage:
   5  *
   6  * Set options:
   7  *              $( '#textbox' ).suggestions( { option1: value1, option2: value2 } );
   8  *              $( '#textbox' ).suggestions( option, value );
   9  * Get option:
  10  *              value = $( '#textbox' ).suggestions( option );
  11  * Initialize:
  12  *              $( '#textbox' ).suggestions();
  13  *
  14  * Options:
  15  *
  16  * fetch(query): Callback that should fetch suggestions and set the suggestions property.
  17  *      Executed in the context of the textbox
  18  *              Type: Function
  19  * cancel: Callback function to call when any pending asynchronous suggestions fetches
  20  *      should be canceled. Executed in the context of the textbox
  21  *              Type: Function
  22  * special: Set of callbacks for rendering and selecting
  23  *              Type: Object of Functions 'render' and 'select'
  24  * result: Set of callbacks for rendering and selecting
  25  *              Type: Object of Functions 'render' and 'select'
  26  * $region: jQuery selection of element to place the suggestions below and match width of
  27  *              Type: jQuery Object, Default: $(this)
  28  * suggestions: Suggestions to display
  29  *              Type: Array of strings
  30  * maxRows: Maximum number of suggestions to display at one time
  31  *              Type: Number, Range: 1 - 100, Default: 7
  32  * delay: Number of ms to wait for the user to stop typing
  33  *              Type: Number, Range: 0 - 1200, Default: 120
  34  * submitOnClick: Whether to submit the form containing the textbox when a suggestion is clicked
  35  *              Type: Boolean, Default: false
  36  * maxExpandFactor: Maximum suggestions box width relative to the textbox width. If set
  37  *      to e.g. 2, the suggestions box will never be grown beyond 2 times the width of the textbox.
  38  *              Type: Number, Range: 1 - infinity, Default: 3
  39  * expandFrom: Which direction to offset the suggestion box from.
  40  *      Values 'start' and 'end' translate to left and right respectively depending on the
  41  *      directionality of the current document, according to $( 'html' ).css( 'direction' ).
  42  *      Type: String, default: 'auto', options: 'left', 'right', 'start', 'end', 'auto'.
  43  * positionFromLeft: Sets expandFrom=left, for backwards compatibility
  44  *              Type: Boolean, Default: true
  45  * highlightInput: Whether to hightlight matched portions of the input or not
  46  *              Type: Boolean, Default: false
  47  */
  48 ( function ( $ ) {
  49
  50 $.suggestions = {
  51         /**
  52          * Cancel any delayed maybeFetch() call and callback the context so
  53          * they can cancel any async fetching if they use AJAX or something.
  54          */
  55         cancel: function ( context ) {
  56                 if ( context.data.timerID !== null ) {
  57                         clearTimeout( context.data.timerID );
  58                 }
  59                 if ( $.isFunction( context.config.cancel ) ) {
  60                         context.config.cancel.call( context.data.$textbox );
  61                 }
  62         },
  63
  64         /**
  65          * Hide the element with suggestions and clean up some state.
  66          */
  67         hide: function ( context ) {
  68                 // Remove any highlights, including on "special" items
  69                 context.data.$container.find( '.suggestions-result-current' ).removeClass( 'suggestions-result-current' );
  70                 // Hide the container
  71                 context.data.$container.hide();
  72         },
  73
  74         /**
  75          * Restore the text the user originally typed in the textbox, before it
  76          * was overwritten by highlight(). This restores the value the currently
  77          * displayed suggestions are based on, rather than the value just before
  78          * highlight() overwrote it; the former is arguably slightly more sensible.
  79          */
  80         restore: function ( context ) {
  81                 context.data.$textbox.val( context.data.prevText );
  82         },
  83
  84         /**
  85          * Ask the user-specified callback for new suggestions. Any previous delayed
  86          * call to this function still pending will be canceled. If the value in the
  87          * textbox is empty or hasn't changed since the last time suggestions were fetched,
  88          * this function does nothing.
  89          * @param {Boolean} delayed Whether or not to delay this by the currently configured amount of time
  90          */
  91         update: function ( context, delayed ) {
  92                 // Only fetch if the value in the textbox changed and is not empty, or if the results were hidden
  93                 // if the textbox is empty then clear the result div, but leave other settings intouched
  94                 function maybeFetch() {
  95                         if ( context.data.$textbox.val().length === 0 ) {
  96                                 $.suggestions.hide( context );
  97                                 context.data.prevText = '';
  98                         } else if (
  99                                 context.data.$textbox.val() !== context.data.prevText ||
 100                                 !context.data.$container.is( ':visible' )
 101                         ) {
 102                                 if ( typeof context.config.fetch === 'function' ) {
 103                                         context.data.prevText = context.data.$textbox.val();
 104                                         context.config.fetch.call( context.data.$textbox, context.data.$textbox.val() );
 105                                 }
 106                         }
 107                 }
 108
 109                 // Cancels any delayed maybeFetch call, and invokes context.config.cancel.
 110                 $.suggestions.cancel( context );
 111
 112                 if ( delayed ) {
 113                         // To avoid many started/aborted requests while typing, we're gonna take a short
 114                         // break before trying to fetch data.
 115                         context.data.timerID = setTimeout( maybeFetch, context.config.delay );
 116                 } else {
 117                         maybeFetch();
 118                 }
 119                 $.suggestions.special( context );
 120         },
 121
 122         special: function ( context ) {
 123                 // Allow custom rendering - but otherwise don't do any rendering
 124                 if ( typeof context.config.special.render === 'function' ) {
 125                         // Wait for the browser to update the value
 126                         setTimeout( function () {
 127                                 // Render special
 128                                 var $special = context.data.$container.find( '.suggestions-special' );
 129                                 context.config.special.render.call( $special, context.data.$textbox.val(), context );
 130                         }, 1 );
 131                 }
 132         },
 133
 134         /**
 135          * Sets the value of a property, and updates the widget accordingly
 136          * @param property String Name of property
 137          * @param value Mixed Value to set property with
 138          */
 139         configure: function ( context, property, value ) {
 140                 var newCSS,
 141                         $autoEllipseMe, $result, $results, childrenWidth,
 142                         i, expWidth, matchedText, maxWidth, text;
 143
 144                 // Validate creation using fallback values
 145                 switch( property ) {
 146                         case 'fetch':
 147                         case 'cancel':
 148                         case 'special':
 149                         case 'result':
 150                         case '$region':
 151                         case 'expandFrom':
 152                                 context.config[property] = value;
 153                                 break;
 154                         case 'suggestions':
 155                                 context.config[property] = value;
 156                                 // Update suggestions
 157                                 if ( context.data !== undefined ) {
 158                                         if ( context.data.$textbox.val().length === 0 ) {
 159                                                 // Hide the div when no suggestion exist
 160                                                 $.suggestions.hide( context );
 161                                         } else {
 162                                                 // Rebuild the suggestions list
 163                                                 context.data.$container.show();
 164                                                 // Update the size and position of the list
 165                                                 newCSS = {
 166                                                         top: context.config.$region.offset().top + context.config.$region.outerHeight(),
 167                                                         bottom: 'auto',
 168                                                         width: context.config.$region.outerWidth(),
 169                                                         height: 'auto'
 170                                                 };
 171
 172                                                 // Process expandFrom, after this it is set to left or right.
 173                                                 context.config.expandFrom = ( function ( expandFrom ) {
 174                                                         var regionWidth, docWidth, regionCenter, docCenter,
 175                                                                 docDir = $( document.documentElement ).css( 'direction' ),
 176                                                                 $region = context.config.$region;
 177
 178                                                         // Backwards compatible
 179                                                         if ( context.config.positionFromLeft ) {
 180                                                                 expandFrom = 'left';
 181
 182                                                         // Catch invalid values, default to 'auto'
 183                                                         } else if ( $.inArray( expandFrom, ['left', 'right', 'start', 'end', 'auto'] ) === -1 ) {
 184                                                                 expandFrom = 'auto';
 185                                                         }
 186
 187                                                         if ( expandFrom === 'auto' ) {
 188                                                                 if ( $region.data( 'searchsuggest-expand-dir' ) ) {
 189                                                                         // If the markup explicitly contains a direction, use it.
 190                                                                         expandFrom = $region.data( 'searchsuggest-expand-dir' );
 191                                                                 } else {
 192                                                                         regionWidth = $region.outerWidth();
 193                                                                         docWidth = $( document ).width();
 194                                                                         if ( ( regionWidth / docWidth  ) > 0.85 ) {
 195                                                                                 // If the input size takes up more than 85% of the document horizontally
 196                                                                                 // expand the suggestions to the writing direction's native end.
 197                                                                                 expandFrom = 'start';
 198                                                                         } else {
 199                                                                                 // Calculate the center points of the input and document
 200                                                                                 regionCenter = $region.offset().left + regionWidth / 2;
 201                                                                                 docCenter = docWidth / 2;
 202                                                                                 if ( Math.abs( regionCenter - docCenter ) / docCenter < 0.10 ) {
 203                                                                                         // If the input's center is within 10% of the document center
 204                                                                                         // use the writing direction's native end.
 205                                                                                         expandFrom = 'start';
 206                                                                                 } else {
 207                                                                                         // Otherwise expand the input from the closest side of the page,
 208                                                                                         // towards the side of the page with the most free open space
 209                                                                                         expandFrom = regionCenter > docCenter ? 'right' : 'left';
 210                                                                                 }
 211                                                                         }
 212                                                                 }
 213                                                         }
 214
 215                                                         if ( expandFrom === 'start' ) {
 216                                                                 expandFrom = docDir === 'rtl' ? 'right': 'left';
 217
 218                                                         } else if ( expandFrom === 'end' ) {
 219                                                                 expandFrom = docDir === 'rtl' ? 'left': 'right';
 220                                                         }
 221
 222                                                         return expandFrom;
 223
 224                                                 }( context.config.expandFrom ) );
 225
 226                                                 if ( context.config.expandFrom === 'left' ) {
 227                                                         // Expand from left
 228                                                         newCSS.left = context.config.$region.offset().left;
 229                                                         newCSS.right = 'auto';
 230                                                 } else {
 231                                                         // Expand from right
 232                                                         newCSS.left = 'auto';
 233                                                         newCSS.right = $( document ).width() - ( context.config.$region.offset().left + context.config.$region.outerWidth() );
 234                                                 }
 235
 236                                                 context.data.$container.css( newCSS );
 237                                                 $results = context.data.$container.children( '.suggestions-results' );
 238                                                 $results.empty();
 239                                                 expWidth = -1;
 240                                                 $autoEllipseMe = $( [] );
 241                                                 matchedText = null;
 242                                                 for ( i = 0; i < context.config.suggestions.length; i++ ) {
 243                                                         /*jshint loopfunc:true */
 244                                                         text = context.config.suggestions[i];
 245                                                         $result = $( '<div>' )
 246                                                                 .addClass( 'suggestions-result' )
 247                                                                 .attr( 'rel', i )
 248                                                                 .data( 'text', context.config.suggestions[i] )
 249                                                                 .mousemove( function () {
 250                                                                         context.data.selectedWithMouse = true;
 251                                                                         $.suggestions.highlight(
 252                                                                                 context,
 253                                                                                 $(this).closest( '.suggestions-results .suggestions-result' ),
 254                                                                                 false
 255                                                                         );
 256                                                                 } )
 257                                                                 .appendTo( $results );
 258                                                         // Allow custom rendering
 259                                                         if ( typeof context.config.result.render === 'function' ) {
 260                                                                 context.config.result.render.call( $result, context.config.suggestions[i], context );
 261                                                         } else {
 262                                                                 // Add <span> with text
 263                                                                 $result.append( $( '<span>' )
 264                                                                                 .css( 'whiteSpace', 'nowrap' )
 265                                                                                 .text( text )
 266                                                                         );
 267                                                         }
 268
 269                                                         if ( context.config.highlightInput ) {
 270                                                                 matchedText = context.data.prevText;
 271                                                         }
 272
 273                                                         // Widen results box if needed
 274                                                         // New width is only calculated here, applied later
 275                                                         childrenWidth = $result.children().outerWidth();
 276                                                         if ( childrenWidth > $result.width() && childrenWidth > expWidth ) {
 277                                                                 // factor in any padding, margin, or border space on the parent
 278                                                                 expWidth = childrenWidth + ( context.data.$container.width() - $result.width() );
 279                                                         }
 280                                                         $autoEllipseMe = $autoEllipseMe.add( $result );
 281                                                 }
 282                                                 // Apply new width for results box, if any
 283                                                 if ( expWidth > context.data.$container.width() ) {
 284                                                         maxWidth = context.config.maxExpandFactor*context.data.$textbox.width();
 285                                                         context.data.$container.width( Math.min( expWidth, maxWidth ) );
 286                                                 }
 287                                                 // autoEllipse the results. Has to be done after changing the width
 288                                                 $autoEllipseMe.autoEllipsis( {
 289                                                         hasSpan: true,
 290                                                         tooltip: true,
 291                                                         matchText: matchedText
 292                                                 } );
 293                                         }
 294                                 }
 295                                 break;
 296                         case 'maxRows':
 297                                 context.config[property] = Math.max( 1, Math.min( 100, value ) );
 298                                 break;
 299                         case 'delay':
 300                                 context.config[property] = Math.max( 0, Math.min( 1200, value ) );
 301                                 break;
 302                         case 'maxExpandFactor':
 303                                 context.config[property] = Math.max( 1, value );
 304                                 break;
 305                         case 'submitOnClick':
 306                         case 'positionFromLeft':
 307                         case 'highlightInput':
 308                                 context.config[property] = value ? true : false;
 309                                 break;
 310                 }
 311         },
 312
 313         /**
 314          * Highlight a result in the results table
 315          * @param result <tr> to highlight: jQuery object, or 'prev' or 'next'
 316          * @param updateTextbox If true, put the suggestion in the textbox
 317          */
 318         highlight: function ( context, result, updateTextbox ) {
 319                 var selected = context.data.$container.find( '.suggestions-result-current' );
 320                 if ( !result.get || selected.get( 0 ) !== result.get( 0 ) ) {
 321                         if ( result === 'prev' ) {
 322                                 if( selected.hasClass( 'suggestions-special' ) ) {
 323                                         result = context.data.$container.find( '.suggestions-result:last' );
 324                                 } else {
 325                                         result = selected.prev();
 326                                         if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
 327                                                 // there is something in the DOM between selected element and the wrapper, bypass it
 328                                                 result = selected.parents( '.suggestions-results > *' ).prev().find( '.suggestions-result' ).eq(0);
 329                                         }
 330
 331                                         if ( selected.length === 0 ) {
 332                                                 // we are at the beginning, so lets jump to the last item
 333                                                 if ( context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 334                                                         result = context.data.$container.find( '.suggestions-special' );
 335                                                 } else {
 336                                                         result = context.data.$container.find( '.suggestions-results .suggestions-result:last' );
 337                                                 }
 338                                         }
 339                                 }
 340                         } else if ( result === 'next' ) {
 341                                 if ( selected.length === 0 ) {
 342                                         // No item selected, go to the first one
 343                                         result = context.data.$container.find( '.suggestions-results .suggestions-result:first' );
 344                                         if ( result.length === 0 && context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 345                                                 // No suggestion exists, go to the special one directly
 346                                                 result = context.data.$container.find( '.suggestions-special' );
 347                                         }
 348                                 } else {
 349                                         result = selected.next();
 350                                         if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
 351                                                 // there is something in the DOM between selected element and the wrapper, bypass it
 352                                                 result = selected.parents( '.suggestions-results > *' ).next().find( '.suggestions-result' ).eq(0);
 353                                         }
 354
 355                                         if ( selected.hasClass( 'suggestions-special' ) ) {
 356                                                 result = $( [] );
 357                                         } else if (
 358                                                 result.length === 0 &&
 359                                                 context.data.$container.find( '.suggestions-special' ).html() !== ''
 360                                         ) {
 361                                                 // We were at the last item, jump to the specials!
 362                                                 result = context.data.$container.find( '.suggestions-special' );
 363                                         }
 364                                 }
 365                         }
 366                         selected.removeClass( 'suggestions-result-current' );
 367                         result.addClass( 'suggestions-result-current' );
 368                 }
 369                 if ( updateTextbox ) {
 370                         if ( result.length === 0 || result.is( '.suggestions-special' ) ) {
 371                                 $.suggestions.restore( context );
 372                         } else {
 373                                 context.data.$textbox.val( result.data( 'text' ) );
 374                                 // .val() doesn't call any event handlers, so
 375                                 // let the world know what happened
 376                                 context.data.$textbox.change();
 377                         }
 378                         context.data.$textbox.trigger( 'change' );
 379                 }
 380         },
 381
 382         /**
 383          * Respond to keypress event
 384          * @param key Integer Code of key pressed
 385          */
 386         keypress: function ( e, context, key ) {
 387                 var selected,
 388                         wasVisible = context.data.$container.is( ':visible' ),
 389                         preventDefault = false;
 390
 391                 switch ( key ) {
 392                         // Arrow down
 393                         case 40:
 394                                 if ( wasVisible ) {
 395                                         $.suggestions.highlight( context, 'next', true );
 396                                         context.data.selectedWithMouse = false;
 397                                 } else {
 398                                         $.suggestions.update( context, false );
 399                                 }
 400                                 preventDefault = true;
 401                                 break;
 402                         // Arrow up
 403                         case 38:
 404                                 if ( wasVisible ) {
 405                                         $.suggestions.highlight( context, 'prev', true );
 406                                         context.data.selectedWithMouse = false;
 407                                 }
 408                                 preventDefault = wasVisible;
 409                                 break;
 410                         // Escape
 411                         case 27:
 412                                 $.suggestions.hide( context );
 413                                 $.suggestions.restore( context );
 414                                 $.suggestions.cancel( context );
 415                                 context.data.$textbox.trigger( 'change' );
 416                                 preventDefault = wasVisible;
 417                                 break;
 418                         // Enter
 419                         case 13:
 420                                 preventDefault = wasVisible;
 421                                 selected = context.data.$container.find( '.suggestions-result-current' );
 422                                 $.suggestions.hide( context );
 423                                 if ( selected.length === 0 || context.data.selectedWithMouse ) {
 424                                         // if nothing is selected OR if something was selected with the mouse,
 425                                         // cancel any current requests and submit the form
 426                                         $.suggestions.cancel( context );
 427                                         context.config.$region.closest( 'form' ).submit();
 428                                 } else if ( selected.is( '.suggestions-special' ) ) {
 429                                         if ( typeof context.config.special.select === 'function' ) {
 430                                                 context.config.special.select.call( selected, context.data.$textbox );
 431                                         }
 432                                 } else {
 433                                         if ( typeof context.config.result.select === 'function' ) {
 434                                                 $.suggestions.highlight( context, selected, true );
 435                                                 context.config.result.select.call( selected, context.data.$textbox );
 436                                         } else {
 437                                                 $.suggestions.highlight( context, selected, true );
 438                                         }
 439                                 }
 440                                 break;
 441                         default:
 442                                 $.suggestions.update( context, true );
 443                                 break;
 444                 }
 445                 if ( preventDefault ) {
 446                         e.preventDefault();
 447                         e.stopImmediatePropagation();
 448                 }
 449         }
 450 };
 451 $.fn.suggestions = function () {
 452
 453         // Multi-context fields
 454         var returnValue,
 455                 args = arguments;
 456
 457         $(this).each( function () {
 458                 var context, key;
 459
 460                 /* Construction / Loading */
 461
 462                 context = $(this).data( 'suggestions-context' );
 463                 if ( context === undefined || context === null ) {
 464                         context = {
 465                                 config: {
 466                                         fetch: function () {},
 467                                         cancel: function () {},
 468                                         special: {},
 469                                         result: {},
 470                                         $region: $(this),
 471                                         suggestions: [],
 472                                         maxRows: 7,
 473                                         delay: 120,
 474                                         submitOnClick: false,
 475                                         maxExpandFactor: 3,
 476                                         expandFrom: 'auto',
 477                                         highlightInput: false
 478                                 }
 479                         };
 480                 }
 481
 482                 /* API */
 483
 484                 // Handle various calling styles
 485                 if ( args.length > 0 ) {
 486                         if ( typeof args[0] === 'object' ) {
 487                                 // Apply set of properties
 488                                 for ( key in args[0] ) {
 489                                         $.suggestions.configure( context, key, args[0][key] );
 490                                 }
 491                         } else if ( typeof args[0] === 'string' ) {
 492                                 if ( args.length > 1 ) {
 493                                         // Set property values
 494                                         $.suggestions.configure( context, args[0], args[1] );
 495                                 } else if ( returnValue === null || returnValue === undefined ) {
 496                                         // Get property values, but don't give access to internal data - returns only the first
 497                                         returnValue = ( args[0] in context.config ? undefined : context.config[args[0]] );
 498                                 }
 499                         }
 500                 }
 501
 502                 /* Initialization */
 503
 504                 if ( context.data === undefined ) {
 505                         context.data = {
 506                                 // ID of running timer
 507                                 timerID: null,
 508
 509                                 // Text in textbox when suggestions were last fetched
 510                                 prevText: null,
 511
 512                                 // Number of results visible without scrolling
 513                                 visibleResults: 0,
 514
 515                                 // Suggestion the last mousedown event occured on
 516                                 mouseDownOn: $( [] ),
 517                                 $textbox: $(this),
 518                                 selectedWithMouse: false
 519                         };
 520
 521                         context.data.$container = $( '<div>' )
 522                                 .css( 'display', 'none' )
 523                                 .addClass( 'suggestions' )
 524                                 .append(
 525                                         $( '<div>' ).addClass( 'suggestions-results' )
 526                                                 // Can't use click() because the container div is hidden when the
 527                                                 // textbox loses focus. Instead, listen for a mousedown followed
 528                                                 // by a mouseup on the same div.
 529                                                 .mousedown( function ( e ) {
 530                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-results .suggestions-result' );
 531                                                 } )
 532                                                 .mouseup( function ( e ) {
 533                                                         var $result = $( e.target ).closest( '.suggestions-results .suggestions-result' ),
 534                                                                 $other = context.data.mouseDownOn;
 535
 536                                                         context.data.mouseDownOn = $( [] );
 537                                                         if ( $result.get( 0 ) !== $other.get( 0 ) ) {
 538                                                                 return;
 539                                                         }
 540                                                         // do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click)
 541                                                         if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
 542                                                                 $.suggestions.highlight( context, $result, true );
 543                                                                 $.suggestions.hide( context );
 544                                                                 if ( typeof context.config.result.select === 'function' ) {
 545                                                                         context.config.result.select.call( $result, context.data.$textbox );
 546                                                                 }
 547                                                         }
 548                                                         // but still restore focus to the textbox, so that the suggestions will be hidden properly
 549                                                         context.data.$textbox.focus();
 550                                                 } )
 551                                 )
 552                                 .append(
 553                                         $( '<div>' ).addClass( 'suggestions-special' )
 554                                                 // Can't use click() because the container div is hidden when the
 555                                                 // textbox loses focus. Instead, listen for a mousedown followed
 556                                                 // by a mouseup on the same div.
 557                                                 .mousedown( function ( e ) {
 558                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-special' );
 559                                                 } )
 560                                                 .mouseup( function ( e ) {
 561                                                         var $special = $( e.target ).closest( '.suggestions-special' ),
 562                                                                 $other = context.data.mouseDownOn;
 563
 564                                                         context.data.mouseDownOn = $( [] );
 565                                                         if ( $special.get( 0 ) !== $other.get( 0 ) ) {
 566                                                                 return;
 567                                                         }
 568                                                         // do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click)
 569                                                         if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
 570                                                                 $.suggestions.hide( context );
 571                                                                 if ( typeof context.config.special.select === 'function' ) {
 572                                                                         context.config.special.select.call( $special, context.data.$textbox );
 573                                                                 }
 574                                                         }
 575                                                         // but still restore focus to the textbox, so that the suggestions will be hidden properly
 576                                                         context.data.$textbox.focus();
 577                                                 } )
 578                                                 .mousemove( function ( e ) {
 579                                                         context.data.selectedWithMouse = true;
 580                                                         $.suggestions.highlight(
 581                                                                 context, $( e.target ).closest( '.suggestions-special' ), false
 582                                                         );
 583                                                 } )
 584                                 )
 585                                 .appendTo( $( 'body' ) );
 586
 587                         $(this)
 588                                 // Stop browser autocomplete from interfering
 589                                 .attr( 'autocomplete', 'off')
 590                                 .keydown( function ( e ) {
 591                                         // Store key pressed to handle later
 592                                         context.data.keypressed = e.which;
 593                                         context.data.keypressedCount = 0;
 594
 595                                         switch ( context.data.keypressed ) {
 596                                                 // This preventDefault logic is duplicated from
 597                                                 // $.suggestions.keypress(), which sucks
 598                                                 // Arrow down
 599                                                 case 40:
 600                                                         e.preventDefault();
 601                                                         e.stopImmediatePropagation();
 602                                                         break;
 603                                                 // Arrow up, Escape and Enter
 604                                                 case 38:
 605                                                 case 27:
 606                                                 case 13:
 607                                                         if ( context.data.$container.is( ':visible' ) ) {
 608                                                                 e.preventDefault();
 609                                                                 e.stopImmediatePropagation();
 610                                                         }
 611                                         }
 612                                 } )
 613                                 .keypress( function ( e ) {
 614                                         context.data.keypressedCount++;
 615                                         $.suggestions.keypress( e, context, context.data.keypressed );
 616                                 } )
 617                                 .keyup( function ( e ) {
 618                                         // Some browsers won't throw keypress() for arrow keys. If we got a keydown and a keyup without a
 619                                         // keypress in between, solve it
 620                                         if ( context.data.keypressedCount === 0 ) {
 621                                                 $.suggestions.keypress( e, context, context.data.keypressed );
 622                                         }
 623                                 } )
 624                                 .blur( function () {
 625                                         // When losing focus because of a mousedown
 626                                         // on a suggestion, don't hide the suggestions
 627                                         if ( context.data.mouseDownOn.length > 0 ) {
 628                                                 return;
 629                                         }
 630                                         $.suggestions.hide( context );
 631                                         $.suggestions.cancel( context );
 632                                 } );
 633                 }
 634
 635                 // Store the context for next time
 636                 $(this).data( 'suggestions-context', context );
 637         } );
 638         return returnValue !== undefined ? returnValue : $(this);
 639 };
 640
 641 }( jQuery ) );