resources/src/jquery/jquery.suggestions.js

   1 /**
   2  * This plugin provides a generic way to add suggestions to a text box.
   3  *
   4  * Set options:
   5  *
   6  *              $( '#textbox' ).suggestions( { option1: value1, option2: value2 } );
   7  *              $( '#textbox' ).suggestions( option, value );
   8  *
   9  * Get option:
  10  *
  11  *              value = $( '#textbox' ).suggestions( option );
  12  *
  13  * Initialize:
  14  *
  15  *              $( '#textbox' ).suggestions();
  16  *
  17  * Uses jQuery.suggestions singleteon internally.
  18  *
  19  * @class jQuery.plugin.suggestions
  20  */
  21 /**
  22  * @method suggestions
  23  * @return {jQuery}
  24  * @chainable
  25  *
  26  * @param {Object} options
  27  *
  28  * @param {Function} [options.fetch] Callback that should fetch suggestions and set the suggestions
  29  *  property. Called in context of the text box.
  30  * @param {string} options.fetch.query
  31  * @param {Function} options.fetch.response Callback to receive the suggestions with
  32  * @param {Array} options.fetch.response.suggestions
  33  * @param {number} options.fetch.maxRows
  34  *
  35  * @param {Function} [options.cancel] Callback function to call when any pending asynchronous
  36  *  suggestions fetches. Called in context of the text box.
  37  *
  38  * @param {Object} [options.special] Set of callbacks for rendering and selecting.
  39  *
  40  * @param {Function} options.special.render Called in context of the suggestions-special element.
  41  * @param {string} options.special.render.query
  42  * @param {Object} options.special.render.context
  43  *
  44  * @param {Function} options.special.select Called in context of the suggestions-result-current element.
  45  * @param {jQuery} options.special.select.$textbox
  46  *
  47  * @param {Object} [options.result] Set of callbacks for rendering and selecting
  48  *
  49  * @param {Function} options.result.render Called in context of the suggestions-result element.
  50  * @param {string} options.result.render.suggestion
  51  * @param {Object} options.result.render.context
  52  *
  53  * @param {Function} options.result.select Called in context of the suggestions-result-current element.
  54  * @param {jQuery} options.result.select.$textbox
  55  *
  56  * @param {Object} [options.update] Set of callbacks for listening to a change in the text input.
  57  *
  58  * @param {Function} options.update.before Called right after the user changes the textbox text.
  59  * @param {Function} options.update.after Called after results are updated either from the cache or
  60  * the API as a result of the user input.
  61  *
  62  * @param {jQuery} [options.$region=this] The element to place the suggestions below and match width of.
  63  *
  64  * @param {string[]} [options.suggestions] Array of suggestions to display.
  65  *
  66  * @param {number} [options.maxRows=10] Maximum number of suggestions to display at one time.
  67  *  Must be between 1 and 100.
  68  *
  69  * @param {number} [options.delay=120] Number of milliseconds to wait for the user to stop typing.
  70  *  Must be between 0 and 1200.
  71  *
  72  * @param {boolean} [options.cache=false] Whether to cache results from a fetch.
  73  *
  74  * @param {number} [options.cacheMaxAge=60000] Number of milliseconds to cache results from a fetch.
  75  *  Must be higher than 1. Defaults to 1 minute.
  76  *
  77  * @param {boolean} [options.submitOnClick=false] Whether to submit the form containing the textbox
  78  *  when a suggestion is clicked.
  79  *
  80  * @param {number} [options.maxExpandFactor=3] Maximum suggestions box width relative to the textbox
  81  *  width. If set to e.g. 2, the suggestions box will never be grown beyond 2 times the width of
  82  *  the textbox. Must be higher than 1.
  83  *
  84  * @param {string} [options.expandFrom=auto] Which direction to offset the suggestion box from.
  85  *  Values 'start' and 'end' translate to left and right respectively depending on the directionality
  86  *   of the current document, according to `$( 'html' ).css( 'direction' )`.
  87  *   Valid values: "left", "right", "start", "end", and "auto".
  88  *
  89  * @param {boolean} [options.positionFromLeft] Sets `expandFrom=left`, for backwards
  90  *  compatibility.
  91  *
  92  * @param {boolean} [options.highlightInput=false] Whether to highlight matched portions of the
  93  *  input or not.
  94  */
  95 ( function ( $ ) {
  96
  97 var hasOwn = Object.hasOwnProperty;
  98
  99 /**
 100  * Used by jQuery.plugin.suggestions.
 101  *
 102  * @class jQuery.suggestions
 103  * @singleton
 104  * @private
 105  */
 106 $.suggestions = {
 107         /**
 108          * Cancel any delayed maybeFetch() call and callback the context so
 109          * they can cancel any async fetching if they use AJAX or something.
 110          */
 111         cancel: function ( context ) {
 112                 if ( context.data.timerID !== null ) {
 113                         clearTimeout( context.data.timerID );
 114                 }
 115                 if ( $.isFunction( context.config.cancel ) ) {
 116                         context.config.cancel.call( context.data.$textbox );
 117                 }
 118         },
 119
 120         /**
 121          * Hide the element with suggestions and clean up some state.
 122          */
 123         hide: function ( context ) {
 124                 // Remove any highlights, including on "special" items
 125                 context.data.$container.find( '.suggestions-result-current' ).removeClass( 'suggestions-result-current' );
 126                 // Hide the container
 127                 context.data.$container.hide();
 128         },
 129
 130         /**
 131          * Restore the text the user originally typed in the textbox, before it
 132          * was overwritten by highlight(). This restores the value the currently
 133          * displayed suggestions are based on, rather than the value just before
 134          * highlight() overwrote it; the former is arguably slightly more sensible.
 135          */
 136         restore: function ( context ) {
 137                 context.data.$textbox.val( context.data.prevText );
 138         },
 139
 140         /**
 141          * Ask the user-specified callback for new suggestions. Any previous delayed
 142          * call to this function still pending will be canceled. If the value in the
 143          * textbox is empty or hasn't changed since the last time suggestions were fetched,
 144          * this function does nothing.
 145          * @param {boolean} delayed Whether or not to delay this by the currently configured amount of time
 146          */
 147         update: function ( context, delayed ) {
 148                 function maybeFetch() {
 149                         var val = context.data.$textbox.val(),
 150                                 cache = context.data.cache,
 151                                 cacheHit;
 152
 153                         if ( typeof context.config.update.before === 'function' ) {
 154                                 context.config.update.before.call( context.data.$textbox );
 155                         }
 156
 157                         // Only fetch if the value in the textbox changed and is not empty, or if the results were hidden
 158                         // if the textbox is empty then clear the result div, but leave other settings intouched
 159                         if ( val.length === 0 ) {
 160                                 $.suggestions.hide( context );
 161                                 context.data.prevText = '';
 162                         } else if (
 163                                 val !== context.data.prevText ||
 164                                 !context.data.$container.is( ':visible' )
 165                         ) {
 166                                 context.data.prevText = val;
 167                                 // Try cache first
 168                                 if ( context.config.cache && hasOwn.call( cache, val ) ) {
 169                                         if ( +new Date() - cache[ val ].timestamp < context.config.cacheMaxAge ) {
 170                                                 context.data.$textbox.suggestions( 'suggestions', cache[ val ].suggestions );
 171                                                 if ( typeof context.config.update.after === 'function' ) {
 172                                                         context.config.update.after.call( context.data.$textbox );
 173                                                 }
 174                                                 cacheHit = true;
 175                                         } else {
 176                                                 // Cache expired
 177                                                 delete cache[ val ];
 178                                         }
 179                                 }
 180                                 if ( !cacheHit && typeof context.config.fetch === 'function' ) {
 181                                         context.config.fetch.call(
 182                                                 context.data.$textbox,
 183                                                 val,
 184                                                 function ( suggestions ) {
 185                                                         suggestions = suggestions.slice( 0, context.config.maxRows );
 186                                                         context.data.$textbox.suggestions( 'suggestions', suggestions );
 187                                                         if ( typeof context.config.update.after === 'function' ) {
 188                                                                 context.config.update.after.call( context.data.$textbox );
 189                                                         }
 190                                                         if ( context.config.cache ) {
 191                                                                 cache[ val ] = {
 192                                                                         suggestions: suggestions,
 193                                                                         timestamp: +new Date()
 194                                                                 };
 195                                                         }
 196                                                 },
 197                                                 context.config.maxRows
 198                                         );
 199                                 }
 200                         }
 201
 202                         // Always update special rendering
 203                         $.suggestions.special( context );
 204                 }
 205
 206                 // Cancels any delayed maybeFetch call, and invokes context.config.cancel.
 207                 $.suggestions.cancel( context );
 208
 209                 if ( delayed ) {
 210                         // To avoid many started/aborted requests while typing, we're gonna take a short
 211                         // break before trying to fetch data.
 212                         context.data.timerID = setTimeout( maybeFetch, context.config.delay );
 213                 } else {
 214                         maybeFetch();
 215                 }
 216         },
 217
 218         special: function ( context ) {
 219                 // Allow custom rendering - but otherwise don't do any rendering
 220                 if ( typeof context.config.special.render === 'function' ) {
 221                         // Wait for the browser to update the value
 222                         setTimeout( function () {
 223                                 // Render special
 224                                 var $special = context.data.$container.find( '.suggestions-special' );
 225                                 context.config.special.render.call( $special, context.data.$textbox.val(), context );
 226                         }, 1 );
 227                 }
 228         },
 229
 230         /**
 231          * Sets the value of a property, and updates the widget accordingly
 232          * @param {string} property Name of property
 233          * @param {Mixed} value Value to set property with
 234          */
 235         configure: function ( context, property, value ) {
 236                 var newCSS,
 237                         $result, $results, $spanForWidth, childrenWidth,
 238                         i, expWidth, maxWidth, text;
 239
 240                 // Validate creation using fallback values
 241                 switch ( property ) {
 242                         case 'fetch':
 243                         case 'cancel':
 244                         case 'special':
 245                         case 'result':
 246                         case 'update':
 247                         case '$region':
 248                         case 'expandFrom':
 249                                 context.config[property] = value;
 250                                 break;
 251                         case 'suggestions':
 252                                 context.config[property] = value;
 253                                 // Update suggestions
 254                                 if ( context.data !== undefined ) {
 255                                         if ( context.data.$textbox.val().length === 0 ) {
 256                                                 // Hide the div when no suggestion exist
 257                                                 $.suggestions.hide( context );
 258                                         } else {
 259                                                 // Rebuild the suggestions list
 260                                                 context.data.$container.show();
 261                                                 // Update the size and position of the list
 262                                                 newCSS = {
 263                                                         top: context.config.$region.offset().top + context.config.$region.outerHeight(),
 264                                                         bottom: 'auto',
 265                                                         width: context.config.$region.outerWidth(),
 266                                                         height: 'auto'
 267                                                 };
 268
 269                                                 // Process expandFrom, after this it is set to left or right.
 270                                                 context.config.expandFrom = ( function ( expandFrom ) {
 271                                                         var regionWidth, docWidth, regionCenter, docCenter,
 272                                                                 docDir = $( document.documentElement ).css( 'direction' ),
 273                                                                 $region = context.config.$region;
 274
 275                                                         // Backwards compatible
 276                                                         if ( context.config.positionFromLeft ) {
 277                                                                 expandFrom = 'left';
 278
 279                                                         // Catch invalid values, default to 'auto'
 280                                                         } else if ( $.inArray( expandFrom, ['left', 'right', 'start', 'end', 'auto'] ) === -1 ) {
 281                                                                 expandFrom = 'auto';
 282                                                         }
 283
 284                                                         if ( expandFrom === 'auto' ) {
 285                                                                 if ( $region.data( 'searchsuggest-expand-dir' ) ) {
 286                                                                         // If the markup explicitly contains a direction, use it.
 287                                                                         expandFrom = $region.data( 'searchsuggest-expand-dir' );
 288                                                                 } else {
 289                                                                         regionWidth = $region.outerWidth();
 290                                                                         docWidth = $( document ).width();
 291                                                                         if ( regionWidth > ( 0.85 * docWidth ) ) {
 292                                                                                 // If the input size takes up more than 85% of the document horizontally
 293                                                                                 // expand the suggestions to the writing direction's native end.
 294                                                                                 expandFrom = 'start';
 295                                                                         } else {
 296                                                                                 // Calculate the center points of the input and document
 297                                                                                 regionCenter = $region.offset().left + regionWidth / 2;
 298                                                                                 docCenter = docWidth / 2;
 299                                                                                 if ( Math.abs( regionCenter - docCenter ) < ( 0.10 * docCenter ) ) {
 300                                                                                         // If the input's center is within 10% of the document center
 301                                                                                         // use the writing direction's native end.
 302                                                                                         expandFrom = 'start';
 303                                                                                 } else {
 304                                                                                         // Otherwise expand the input from the closest side of the page,
 305                                                                                         // towards the side of the page with the most free open space
 306                                                                                         expandFrom = regionCenter > docCenter ? 'right' : 'left';
 307                                                                                 }
 308                                                                         }
 309                                                                 }
 310                                                         }
 311
 312                                                         if ( expandFrom === 'start' ) {
 313                                                                 expandFrom = docDir === 'rtl' ? 'right' : 'left';
 314
 315                                                         } else if ( expandFrom === 'end' ) {
 316                                                                 expandFrom = docDir === 'rtl' ? 'left' : 'right';
 317                                                         }
 318
 319                                                         return expandFrom;
 320
 321                                                 }( context.config.expandFrom ) );
 322
 323                                                 if ( context.config.expandFrom === 'left' ) {
 324                                                         // Expand from left
 325                                                         newCSS.left = context.config.$region.offset().left;
 326                                                         newCSS.right = 'auto';
 327                                                 } else {
 328                                                         // Expand from right
 329                                                         newCSS.left = 'auto';
 330                                                         newCSS.right = $( 'body' ).width() - ( context.config.$region.offset().left + context.config.$region.outerWidth() );
 331                                                 }
 332
 333                                                 context.data.$container.css( newCSS );
 334                                                 $results = context.data.$container.children( '.suggestions-results' );
 335                                                 $results.empty();
 336                                                 expWidth = -1;
 337                                                 for ( i = 0; i < context.config.suggestions.length; i++ ) {
 338                                                         /*jshint loopfunc:true */
 339                                                         text = context.config.suggestions[i];
 340                                                         $result = $( '<div>' )
 341                                                                 .addClass( 'suggestions-result' )
 342                                                                 .attr( 'rel', i )
 343                                                                 .data( 'text', context.config.suggestions[i] )
 344                                                                 .mousemove( function () {
 345                                                                         context.data.selectedWithMouse = true;
 346                                                                         $.suggestions.highlight(
 347                                                                                 context,
 348                                                                                 $( this ).closest( '.suggestions-results .suggestions-result' ),
 349                                                                                 false
 350                                                                         );
 351                                                                 } )
 352                                                                 .appendTo( $results );
 353                                                         // Allow custom rendering
 354                                                         if ( typeof context.config.result.render === 'function' ) {
 355                                                                 context.config.result.render.call( $result, context.config.suggestions[i], context );
 356                                                         } else {
 357                                                                 $result.text( text );
 358                                                         }
 359
 360                                                         if ( context.config.highlightInput ) {
 361                                                                 $result.highlightText( context.data.prevText );
 362                                                         }
 363
 364                                                         // Widen results box if needed (new width is only calculated here, applied later).
 365
 366                                                         // The monstrosity below accomplishes two things:
 367                                                         // * Wraps the text contents in a DOM element, so that we can know its width. There is
 368                                                         //   no way to directly access the width of a text node, and we can't use the parent
 369                                                         //   node width as it has text-overflow: ellipsis; and overflow: hidden; applied to
 370                                                         //   it, which trims it to a smaller width.
 371                                                         // * Temporarily applies position: absolute; to the wrapper to pull it out of normal
 372                                                         //   document flow. Otherwise the CSS text-overflow: ellipsis; and overflow: hidden;
 373                                                         //   rules would cause some browsers (at least all versions of IE from 6 to 11) to
 374                                                         //   still report the "trimmed" width. This should not be done in regular CSS
 375                                                         //   stylesheets as we don't want this rule to apply to other <span> elements, like
 376                                                         //   the ones generated by jquery.highlightText.
 377                                                         $spanForWidth = $result.wrapInner( '<span>' ).children();
 378                                                         childrenWidth = $spanForWidth.css( 'position', 'absolute' ).outerWidth();
 379                                                         $spanForWidth.contents().unwrap();
 380
 381                                                         if ( childrenWidth > $result.width() && childrenWidth > expWidth ) {
 382                                                                 // factor in any padding, margin, or border space on the parent
 383                                                                 expWidth = childrenWidth + ( context.data.$container.width() - $result.width() );
 384                                                         }
 385                                                 }
 386
 387                                                 // Apply new width for results box, if any
 388                                                 if ( expWidth > context.data.$container.width() ) {
 389                                                         maxWidth = context.config.maxExpandFactor * context.data.$textbox.width();
 390                                                         context.data.$container.width( Math.min( expWidth, maxWidth ) );
 391                                                 }
 392                                         }
 393                                 }
 394                                 break;
 395                         case 'maxRows':
 396                                 context.config[property] = Math.max( 1, Math.min( 100, value ) );
 397                                 break;
 398                         case 'delay':
 399                                 context.config[property] = Math.max( 0, Math.min( 1200, value ) );
 400                                 break;
 401                         case 'cacheMaxAge':
 402                                 context.config[property] = Math.max( 1, value );
 403                                 break;
 404                         case 'maxExpandFactor':
 405                                 context.config[property] = Math.max( 1, value );
 406                                 break;
 407                         case 'cache':
 408                         case 'submitOnClick':
 409                         case 'positionFromLeft':
 410                         case 'highlightInput':
 411                                 context.config[property] = !!value;
 412                                 break;
 413                 }
 414         },
 415
 416         /**
 417          * Highlight a result in the results table
 418          * @param {jQuery|string} result `<tr>` to highlight, or 'prev' or 'next'
 419          * @param {boolean} updateTextbox If true, put the suggestion in the textbox
 420          */
 421         highlight: function ( context, result, updateTextbox ) {
 422                 var selected = context.data.$container.find( '.suggestions-result-current' );
 423                 if ( !result.get || selected.get( 0 ) !== result.get( 0 ) ) {
 424                         if ( result === 'prev' ) {
 425                                 if ( selected.hasClass( 'suggestions-special' ) ) {
 426                                         result = context.data.$container.find( '.suggestions-result:last' );
 427                                 } else {
 428                                         result = selected.prev();
 429                                         if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
 430                                                 // there is something in the DOM between selected element and the wrapper, bypass it
 431                                                 result = selected.parents( '.suggestions-results > *' ).prev().find( '.suggestions-result' ).eq( 0 );
 432                                         }
 433
 434                                         if ( selected.length === 0 ) {
 435                                                 // we are at the beginning, so lets jump to the last item
 436                                                 if ( context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 437                                                         result = context.data.$container.find( '.suggestions-special' );
 438                                                 } else {
 439                                                         result = context.data.$container.find( '.suggestions-results .suggestions-result:last' );
 440                                                 }
 441                                         }
 442                                 }
 443                         } else if ( result === 'next' ) {
 444                                 if ( selected.length === 0 ) {
 445                                         // No item selected, go to the first one
 446                                         result = context.data.$container.find( '.suggestions-results .suggestions-result:first' );
 447                                         if ( result.length === 0 && context.data.$container.find( '.suggestions-special' ).html() !== '' ) {
 448                                                 // No suggestion exists, go to the special one directly
 449                                                 result = context.data.$container.find( '.suggestions-special' );
 450                                         }
 451                                 } else {
 452                                         result = selected.next();
 453                                         if ( !( result.length && result.hasClass( 'suggestions-result' ) ) ) {
 454                                                 // there is something in the DOM between selected element and the wrapper, bypass it
 455                                                 result = selected.parents( '.suggestions-results > *' ).next().find( '.suggestions-result' ).eq( 0 );
 456                                         }
 457
 458                                         if ( selected.hasClass( 'suggestions-special' ) ) {
 459                                                 result = $( [] );
 460                                         } else if (
 461                                                 result.length === 0 &&
 462                                                 context.data.$container.find( '.suggestions-special' ).html() !== ''
 463                                         ) {
 464                                                 // We were at the last item, jump to the specials!
 465                                                 result = context.data.$container.find( '.suggestions-special' );
 466                                         }
 467                                 }
 468                         }
 469                         selected.removeClass( 'suggestions-result-current' );
 470                         result.addClass( 'suggestions-result-current' );
 471                 }
 472                 if ( updateTextbox ) {
 473                         if ( result.length === 0 || result.is( '.suggestions-special' ) ) {
 474                                 $.suggestions.restore( context );
 475                         } else {
 476                                 context.data.$textbox.val( result.data( 'text' ) );
 477                                 // .val() doesn't call any event handlers, so
 478                                 // let the world know what happened
 479                                 context.data.$textbox.change();
 480                         }
 481                         context.data.$textbox.trigger( 'change' );
 482                 }
 483         },
 484
 485         /**
 486          * Respond to keypress event
 487          * @param {number} key Code of key pressed
 488          */
 489         keypress: function ( e, context, key ) {
 490                 var selected,
 491                         wasVisible = context.data.$container.is( ':visible' ),
 492                         preventDefault = false;
 493
 494                 switch ( key ) {
 495                         // Arrow down
 496                         case 40:
 497                                 if ( wasVisible ) {
 498                                         $.suggestions.highlight( context, 'next', true );
 499                                         context.data.selectedWithMouse = false;
 500                                 } else {
 501                                         $.suggestions.update( context, false );
 502                                 }
 503                                 preventDefault = true;
 504                                 break;
 505                         // Arrow up
 506                         case 38:
 507                                 if ( wasVisible ) {
 508                                         $.suggestions.highlight( context, 'prev', true );
 509                                         context.data.selectedWithMouse = false;
 510                                 }
 511                                 preventDefault = wasVisible;
 512                                 break;
 513                         // Escape
 514                         case 27:
 515                                 $.suggestions.hide( context );
 516                                 $.suggestions.restore( context );
 517                                 $.suggestions.cancel( context );
 518                                 context.data.$textbox.trigger( 'change' );
 519                                 preventDefault = wasVisible;
 520                                 break;
 521                         // Enter
 522                         case 13:
 523                                 preventDefault = wasVisible;
 524                                 selected = context.data.$container.find( '.suggestions-result-current' );
 525                                 $.suggestions.hide( context );
 526                                 if ( selected.length === 0 || context.data.selectedWithMouse ) {
 527                                         // If nothing is selected or if something was selected with the mouse
 528                                         // cancel any current requests and allow the form to be submitted
 529                                         // (simply don't prevent default behavior).
 530                                         $.suggestions.cancel( context );
 531                                         preventDefault = false;
 532                                 } else if ( selected.is( '.suggestions-special' ) ) {
 533                                         if ( typeof context.config.special.select === 'function' ) {
 534                                                 // Allow the callback to decide whether to prevent default or not
 535                                                 if ( context.config.special.select.call( selected, context.data.$textbox ) === true ) {
 536                                                         preventDefault = false;
 537                                                 }
 538                                         }
 539                                 } else {
 540                                         if ( typeof context.config.result.select === 'function' ) {
 541                                                 // Allow the callback to decide whether to prevent default or not
 542                                                 if ( context.config.result.select.call( selected, context.data.$textbox ) === true ) {
 543                                                         preventDefault = false;
 544                                                 }
 545                                         }
 546                                 }
 547                                 break;
 548                         default:
 549                                 $.suggestions.update( context, true );
 550                                 break;
 551                 }
 552                 if ( preventDefault ) {
 553                         e.preventDefault();
 554                         e.stopPropagation();
 555                 }
 556         }
 557 };
 558
 559 // See file header for method documentation
 560 $.fn.suggestions = function () {
 561
 562         // Multi-context fields
 563         var returnValue,
 564                 args = arguments;
 565
 566         $( this ).each( function () {
 567                 var context, key;
 568
 569                 /* Construction and Loading */
 570
 571                 context = $( this ).data( 'suggestions-context' );
 572                 if ( context === undefined || context === null ) {
 573                         context = {
 574                                 config: {
 575                                         fetch: function () {},
 576                                         cancel: function () {},
 577                                         special: {},
 578                                         result: {},
 579                                         update: {},
 580                                         $region: $( this ),
 581                                         suggestions: [],
 582                                         maxRows: 10,
 583                                         delay: 120,
 584                                         cache: false,
 585                                         cacheMaxAge: 60000,
 586                                         submitOnClick: false,
 587                                         maxExpandFactor: 3,
 588                                         expandFrom: 'auto',
 589                                         highlightInput: false
 590                                 }
 591                         };
 592                 }
 593
 594                 /* API */
 595
 596                 // Handle various calling styles
 597                 if ( args.length > 0 ) {
 598                         if ( typeof args[0] === 'object' ) {
 599                                 // Apply set of properties
 600                                 for ( key in args[0] ) {
 601                                         $.suggestions.configure( context, key, args[0][key] );
 602                                 }
 603                         } else if ( typeof args[0] === 'string' ) {
 604                                 if ( args.length > 1 ) {
 605                                         // Set property values
 606                                         $.suggestions.configure( context, args[0], args[1] );
 607                                 } else if ( returnValue === null || returnValue === undefined ) {
 608                                         // Get property values, but don't give access to internal data - returns only the first
 609                                         returnValue = ( args[0] in context.config ? undefined : context.config[args[0]] );
 610                                 }
 611                         }
 612                 }
 613
 614                 /* Initialization */
 615
 616                 if ( context.data === undefined ) {
 617                         context.data = {
 618                                 // ID of running timer
 619                                 timerID: null,
 620
 621                                 // Text in textbox when suggestions were last fetched
 622                                 prevText: null,
 623
 624                                 // Cache of fetched suggestions
 625                                 cache: {},
 626
 627                                 // Number of results visible without scrolling
 628                                 visibleResults: 0,
 629
 630                                 // Suggestion the last mousedown event occurred on
 631                                 mouseDownOn: $( [] ),
 632                                 $textbox: $( this ),
 633                                 selectedWithMouse: false
 634                         };
 635
 636                         context.data.$container = $( '<div>' )
 637                                 .css( 'display', 'none' )
 638                                 .addClass( 'suggestions' )
 639                                 .append(
 640                                         $( '<div>' ).addClass( 'suggestions-results' )
 641                                                 // Can't use click() because the container div is hidden when the
 642                                                 // textbox loses focus. Instead, listen for a mousedown followed
 643                                                 // by a mouseup on the same div.
 644                                                 .mousedown( function ( e ) {
 645                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-results .suggestions-result' );
 646                                                 } )
 647                                                 .mouseup( function ( e ) {
 648                                                         var $result = $( e.target ).closest( '.suggestions-results .suggestions-result' ),
 649                                                                 $other = context.data.mouseDownOn;
 650
 651                                                         context.data.mouseDownOn = $( [] );
 652                                                         if ( $result.get( 0 ) !== $other.get( 0 ) ) {
 653                                                                 return;
 654                                                         }
 655                                                         // Do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click).
 656                                                         if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
 657                                                                 $.suggestions.highlight( context, $result, true );
 658                                                                 if ( typeof context.config.result.select === 'function' ) {
 659                                                                         context.config.result.select.call( $result, context.data.$textbox );
 660                                                                 }
 661                                                                 // This will hide the link we're just clicking on, which causes problems
 662                                                                 // when done synchronously in at least Firefox 3.6 (bug 62858).
 663                                                                 setTimeout( function () {
 664                                                                         $.suggestions.hide( context );
 665                                                                 }, 0 );
 666                                                         }
 667                                                         // Always bring focus to the textbox, as that's probably where the user expects it
 668                                                         // if they were just typing.
 669                                                         context.data.$textbox.focus();
 670                                                 } )
 671                                 )
 672                                 .append(
 673                                         $( '<div>' ).addClass( 'suggestions-special' )
 674                                                 // Can't use click() because the container div is hidden when the
 675                                                 // textbox loses focus. Instead, listen for a mousedown followed
 676                                                 // by a mouseup on the same div.
 677                                                 .mousedown( function ( e ) {
 678                                                         context.data.mouseDownOn = $( e.target ).closest( '.suggestions-special' );
 679                                                 } )
 680                                                 .mouseup( function ( e ) {
 681                                                         var $special = $( e.target ).closest( '.suggestions-special' ),
 682                                                                 $other = context.data.mouseDownOn;
 683
 684                                                         context.data.mouseDownOn = $( [] );
 685                                                         if ( $special.get( 0 ) !== $other.get( 0 ) ) {
 686                                                                 return;
 687                                                         }
 688                                                         // Do not interfere with non-left clicks or if modifier keys are pressed (e.g. ctrl-click).
 689                                                         if ( !( e.which !== 1 || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) ) {
 690                                                                 if ( typeof context.config.special.select === 'function' ) {
 691                                                                         context.config.special.select.call( $special, context.data.$textbox );
 692                                                                 }
 693                                                                 // This will hide the link we're just clicking on, which causes problems
 694                                                                 // when done synchronously in at least Firefox 3.6 (bug 62858).
 695                                                                 setTimeout( function () {
 696                                                                         $.suggestions.hide( context );
 697                                                                 }, 0 );
 698                                                         }
 699                                                         // Always bring focus to the textbox, as that's probably where the user expects it
 700                                                         // if they were just typing.
 701                                                         context.data.$textbox.focus();
 702                                                 } )
 703                                                 .mousemove( function ( e ) {
 704                                                         context.data.selectedWithMouse = true;
 705                                                         $.suggestions.highlight(
 706                                                                 context, $( e.target ).closest( '.suggestions-special' ), false
 707                                                         );
 708                                                 } )
 709                                 )
 710                                 .appendTo( $( 'body' ) );
 711
 712                         $( this )
 713                                 // Stop browser autocomplete from interfering
 714                                 .attr( 'autocomplete', 'off' )
 715                                 .keydown( function ( e ) {
 716                                         // Store key pressed to handle later
 717                                         context.data.keypressed = e.which;
 718                                         context.data.keypressedCount = 0;
 719                                 } )
 720                                 .keypress( function ( e ) {
 721                                         context.data.keypressedCount++;
 722                                         $.suggestions.keypress( e, context, context.data.keypressed );
 723                                 } )
 724                                 .keyup( function ( e ) {
 725                                         // Some browsers won't throw keypress() for arrow keys. If we got a keydown and a keyup without a
 726                                         // keypress in between, solve it
 727                                         if ( context.data.keypressedCount === 0 ) {
 728                                                 $.suggestions.keypress( e, context, context.data.keypressed );
 729                                         }
 730                                 } )
 731                                 .blur( function () {
 732                                         // When losing focus because of a mousedown
 733                                         // on a suggestion, don't hide the suggestions
 734                                         if ( context.data.mouseDownOn.length > 0 ) {
 735                                                 return;
 736                                         }
 737                                         $.suggestions.hide( context );
 738                                         $.suggestions.cancel( context );
 739                                 } );
 740                 }
 741
 742                 // Store the context for next time
 743                 $( this ).data( 'suggestions-context', context );
 744         } );
 745         return returnValue !== undefined ? returnValue : $( this );
 746 };
 747
 748 /**
 749  * @class jQuery
 750  * @mixins jQuery.plugin.suggestions
 751  */
 752
 753 }( jQuery ) );