site/swingjs/jquery/ui/jquery.ui.autocomplete.js

   1 /*!
   2  * jQuery UI Autocomplete 1.10.4
   3  * http://jqueryui.com
   4  *
   5  * Copyright 2014 jQuery Foundation and other contributors
   6  * Released under the MIT license.
   7  * http://jquery.org/license
   8  *
   9  * http://api.jqueryui.com/autocomplete/
  10  *
  11  * Depends:
  12  *      jquery.ui.core.js
  13  *      jquery.ui.widget.js
  14  *      jquery.ui.position.js
  15  *      jquery.ui.menu.js
  16  */
  17 (function( $, undefined ) {
  18
  19 $.widget( "ui.autocomplete", {
  20         version: "1.10.4",
  21         defaultElement: "<input>",
  22         options: {
  23                 appendTo: null,
  24                 autoFocus: false,
  25                 delay: 300,
  26                 minLength: 1,
  27                 position: {
  28                         my: "left top",
  29                         at: "left bottom",
  30                         collision: "none"
  31                 },
  32                 source: null,
  33
  34                 // callbacks
  35                 change: null,
  36                 close: null,
  37                 focus: null,
  38                 open: null,
  39                 response: null,
  40                 search: null,
  41                 select: null
  42         },
  43
  44         requestIndex: 0,
  45         pending: 0,
  46
  47         _create: function() {
  48                 // Some browsers only repeat keydown events, not keypress events,
  49                 // so we use the suppressKeyPress flag to determine if we've already
  50                 // handled the keydown event. #7269
  51                 // Unfortunately the code for & in keypress is the same as the up arrow,
  52                 // so we use the suppressKeyPressRepeat flag to avoid handling keypress
  53                 // events when we know the keydown event was used to modify the
  54                 // search term. #7799
  55                 var suppressKeyPress, suppressKeyPressRepeat, suppressInput,
  56                         nodeName = this.element[0].nodeName.toLowerCase(),
  57                         isTextarea = nodeName === "textarea",
  58                         isInput = nodeName === "input";
  59
  60                 this.isMultiLine =
  61                         // Textareas are always multi-line
  62                         isTextarea ? true :
  63                         // Inputs are always single-line, even if inside a contentEditable element
  64                         // IE also treats inputs as contentEditable
  65                         isInput ? false :
  66                         // All other element types are determined by whether or not they're contentEditable
  67                         this.element.prop( "isContentEditable" );
  68
  69                 this.valueMethod = this.element[ isTextarea || isInput ? "val" : "text" ];
  70                 this.isNewMenu = true;
  71
  72                 this.element
  73                         .addClass( "ui-autocomplete-input" )
  74                         .attr( "autocomplete", "off" );
  75
  76                 this._on( this.element, {
  77                         keydown: function( event ) {
  78                                 if ( this.element.prop( "readOnly" ) ) {
  79                                         suppressKeyPress = true;
  80                                         suppressInput = true;
  81                                         suppressKeyPressRepeat = true;
  82                                         return;
  83                                 }
  84
  85                                 suppressKeyPress = false;
  86                                 suppressInput = false;
  87                                 suppressKeyPressRepeat = false;
  88                                 var keyCode = $.ui.keyCode;
  89                                 switch( event.keyCode ) {
  90                                 case keyCode.PAGE_UP:
  91                                         suppressKeyPress = true;
  92                                         this._move( "previousPage", event );
  93                                         break;
  94                                 case keyCode.PAGE_DOWN:
  95                                         suppressKeyPress = true;
  96                                         this._move( "nextPage", event );
  97                                         break;
  98                                 case keyCode.UP:
  99                                         suppressKeyPress = true;
 100                                         this._keyEvent( "previous", event );
 101                                         break;
 102                                 case keyCode.DOWN:
 103                                         suppressKeyPress = true;
 104                                         this._keyEvent( "next", event );
 105                                         break;
 106                                 case keyCode.ENTER:
 107                                 case keyCode.NUMPAD_ENTER:
 108                                         // when menu is open and has focus
 109                                         if ( this.menu.active ) {
 110                                                 // #6055 - Opera still allows the keypress to occur
 111                                                 // which causes forms to submit
 112                                                 suppressKeyPress = true;
 113                                                 event.preventDefault();
 114                                                 this.menu.select( event );
 115                                         }
 116                                         break;
 117                                 case keyCode.TAB:
 118                                         if ( this.menu.active ) {
 119                                                 this.menu.select( event );
 120                                         }
 121                                         break;
 122                                 case keyCode.ESCAPE:
 123                                         if ( this.menu.element.is( ":visible" ) ) {
 124                                                 this._value( this.term );
 125                                                 this.close( event );
 126                                                 // Different browsers have different default behavior for escape
 127                                                 // Single press can mean undo or clear
 128                                                 // Double press in IE means clear the whole form
 129                                                 event.preventDefault();
 130                                         }
 131                                         break;
 132                                 default:
 133                                         suppressKeyPressRepeat = true;
 134                                         // search timeout should be triggered before the input value is changed
 135                                         this._searchTimeout( event );
 136                                         break;
 137                                 }
 138                         },
 139                         keypress: function( event ) {
 140                                 if ( suppressKeyPress ) {
 141                                         suppressKeyPress = false;
 142                                         if ( !this.isMultiLine || this.menu.element.is( ":visible" ) ) {
 143                                                 event.preventDefault();
 144                                         }
 145                                         return;
 146                                 }
 147                                 if ( suppressKeyPressRepeat ) {
 148                                         return;
 149                                 }
 150
 151                                 // replicate some key handlers to allow them to repeat in Firefox and Opera
 152                                 var keyCode = $.ui.keyCode;
 153                                 switch( event.keyCode ) {
 154                                 case keyCode.PAGE_UP:
 155                                         this._move( "previousPage", event );
 156                                         break;
 157                                 case keyCode.PAGE_DOWN:
 158                                         this._move( "nextPage", event );
 159                                         break;
 160                                 case keyCode.UP:
 161                                         this._keyEvent( "previous", event );
 162                                         break;
 163                                 case keyCode.DOWN:
 164                                         this._keyEvent( "next", event );
 165                                         break;
 166                                 }
 167                         },
 168                         input: function( event ) {
 169                                 if ( suppressInput ) {
 170                                         suppressInput = false;
 171                                         event.preventDefault();
 172                                         return;
 173                                 }
 174                                 this._searchTimeout( event );
 175                         },
 176                         focus: function() {
 177                                 this.selectedItem = null;
 178                                 this.previous = this._value();
 179                         },
 180                         blur: function( event ) {
 181                                 if ( this.cancelBlur ) {
 182                                         delete this.cancelBlur;
 183                                         return;
 184                                 }
 185
 186                                 clearTimeout( this.searching );
 187                                 this.close( event );
 188                                 this._change( event );
 189                         }
 190                 });
 191
 192                 this._initSource();
 193                 this.menu = $( "<ul>" )
 194                         .addClass( "ui-autocomplete ui-front" )
 195                         .appendTo( this._appendTo() )
 196                         .menu({
 197                                 // disable ARIA support, the live region takes care of that
 198                                 role: null
 199                         })
 200                         .hide()
 201                         .data( "ui-menu" );
 202
 203                 this._on( this.menu.element, {
 204                         mousedown: function( event ) {
 205                                 // prevent moving focus out of the text field
 206                                 event.preventDefault();
 207
 208                                 // IE doesn't prevent moving focus even with event.preventDefault()
 209                                 // so we set a flag to know when we should ignore the blur event
 210                                 this.cancelBlur = true;
 211                                 this._delay(function() {
 212                                         delete this.cancelBlur;
 213                                 });
 214
 215                                 // clicking on the scrollbar causes focus to shift to the body
 216                                 // but we can't detect a mouseup or a click immediately afterward
 217                                 // so we have to track the next mousedown and close the menu if
 218                                 // the user clicks somewhere outside of the autocomplete
 219                                 var menuElement = this.menu.element[ 0 ];
 220                                 if ( !$( event.target ).closest( ".ui-menu-item" ).length ) {
 221                                         this._delay(function() {
 222                                                 var that = this;
 223                                                 this.document.one( "mousedown", function( event ) {
 224                                                         if ( event.target !== that.element[ 0 ] &&
 225                                                                         event.target !== menuElement &&
 226                                                                         !$.contains( menuElement, event.target ) ) {
 227                                                                 that.close();
 228                                                         }
 229                                                 });
 230                                         });
 231                                 }
 232                         },
 233                         menufocus: function( event, ui ) {
 234                                 // support: Firefox
 235                                 // Prevent accidental activation of menu items in Firefox (#7024 #9118)
 236                                 if ( this.isNewMenu ) {
 237                                         this.isNewMenu = false;
 238                                         if ( event.originalEvent && /^mouse/.test( event.originalEvent.type ) ) {
 239                                                 this.menu.blur();
 240
 241                                                 this.document.one( "mousemove", function() {
 242                                                         $( event.target ).trigger( event.originalEvent );
 243                                                 });
 244
 245                                                 return;
 246                                         }
 247                                 }
 248
 249                                 var item = ui.item.data( "ui-autocomplete-item" );
 250                                 if ( false !== this._trigger( "focus", event, { item: item } ) ) {
 251                                         // use value to match what will end up in the input, if it was a key event
 252                                         if ( event.originalEvent && /^key/.test( event.originalEvent.type ) ) {
 253                                                 this._value( item.value );
 254                                         }
 255                                 } else {
 256                                         // Normally the input is populated with the item's value as the
 257                                         // menu is navigated, causing screen readers to notice a change and
 258                                         // announce the item. Since the focus event was canceled, this doesn't
 259                                         // happen, so we update the live region so that screen readers can
 260                                         // still notice the change and announce it.
 261                                         this.liveRegion.text( item.value );
 262                                 }
 263                         },
 264                         menuselect: function( event, ui ) {
 265                                 var item = ui.item.data( "ui-autocomplete-item" ),
 266                                         previous = this.previous;
 267
 268                                 // only trigger when focus was lost (click on menu)
 269                                 if ( this.element[0] !== this.document[0].activeElement ) {
 270                                         this.element.focus();
 271                                         this.previous = previous;
 272                                         // #6109 - IE triggers two focus events and the second
 273                                         // is asynchronous, so we need to reset the previous
 274                                         // term synchronously and asynchronously :-(
 275                                         this._delay(function() {
 276                                                 this.previous = previous;
 277                                                 this.selectedItem = item;
 278                                         });
 279                                 }
 280
 281                                 if ( false !== this._trigger( "select", event, { item: item } ) ) {
 282                                         this._value( item.value );
 283                                 }
 284                                 // reset the term after the select event
 285                                 // this allows custom select handling to work properly
 286                                 this.term = this._value();
 287
 288                                 this.close( event );
 289                                 this.selectedItem = item;
 290                         }
 291                 });
 292
 293                 this.liveRegion = $( "<span>", {
 294                                 role: "status",
 295                                 "aria-live": "polite"
 296                         })
 297                         .addClass( "ui-helper-hidden-accessible" )
 298                         .insertBefore( this.element );
 299
 300                 // turning off autocomplete prevents the browser from remembering the
 301                 // value when navigating through history, so we re-enable autocomplete
 302                 // if the page is unloaded before the widget is destroyed. #7790
 303                 this._on( this.window, {
 304                         beforeunload: function() {
 305                                 this.element.removeAttr( "autocomplete" );
 306                         }
 307                 });
 308         },
 309
 310         _destroy: function() {
 311                 clearTimeout( this.searching );
 312                 this.element
 313                         .removeClass( "ui-autocomplete-input" )
 314                         .removeAttr( "autocomplete" );
 315                 this.menu.element.remove();
 316                 this.liveRegion.remove();
 317         },
 318
 319         _setOption: function( key, value ) {
 320                 this._super( key, value );
 321                 if ( key === "source" ) {
 322                         this._initSource();
 323                 }
 324                 if ( key === "appendTo" ) {
 325                         this.menu.element.appendTo( this._appendTo() );
 326                 }
 327                 if ( key === "disabled" && value && this.xhr ) {
 328                         this.xhr.abort();
 329                 }
 330         },
 331
 332         _appendTo: function() {
 333                 var element = this.options.appendTo;
 334
 335                 if ( element ) {
 336                         element = element.jquery || element.nodeType ?
 337                                 $( element ) :
 338                                 this.document.find( element ).eq( 0 );
 339                 }
 340
 341                 if ( !element ) {
 342                         element = this.element.closest( ".ui-front" );
 343                 }
 344
 345                 if ( !element.length ) {
 346                         element = this.document[0].body;
 347                 }
 348
 349                 return element;
 350         },
 351
 352         _initSource: function() {
 353                 var array, url,
 354                         that = this;
 355                 if ( $.isArray(this.options.source) ) {
 356                         array = this.options.source;
 357                         this.source = function( request, response ) {
 358                                 response( $.ui.autocomplete.filter( array, request.term ) );
 359                         };
 360                 } else if ( typeof this.options.source === "string" ) {
 361                         url = this.options.source;
 362                         this.source = function( request, response ) {
 363                                 if ( that.xhr ) {
 364                                         that.xhr.abort();
 365                                 }
 366                                 that.xhr = $.ajax({
 367                                         url: url,
 368                                         data: request,
 369                                         dataType: "json",
 370                                         success: function( data ) {
 371                                                 response( data );
 372                                         },
 373                                         error: function() {
 374                                                 response( [] );
 375                                         }
 376                                 });
 377                         };
 378                 } else {
 379                         this.source = this.options.source;
 380                 }
 381         },
 382
 383         _searchTimeout: function( event ) {
 384                 clearTimeout( this.searching );
 385                 this.searching = this._delay(function() {
 386                         // only search if the value has changed
 387                         if ( this.term !== this._value() ) {
 388                                 this.selectedItem = null;
 389                                 this.search( null, event );
 390                         }
 391                 }, this.options.delay );
 392         },
 393
 394         search: function( value, event ) {
 395                 value = value != null ? value : this._value();
 396
 397                 // always save the actual value, not the one passed as an argument
 398                 this.term = this._value();
 399
 400                 if ( value.length < this.options.minLength ) {
 401                         return this.close( event );
 402                 }
 403
 404                 if ( this._trigger( "search", event ) === false ) {
 405                         return;
 406                 }
 407
 408                 return this._search( value );
 409         },
 410
 411         _search: function( value ) {
 412                 this.pending++;
 413                 this.element.addClass( "ui-autocomplete-loading" );
 414                 this.cancelSearch = false;
 415
 416                 this.source( { term: value }, this._response() );
 417         },
 418
 419         _response: function() {
 420                 var index = ++this.requestIndex;
 421
 422                 return $.proxy(function( content ) {
 423                         if ( index === this.requestIndex ) {
 424                                 this.__response( content );
 425                         }
 426
 427                         this.pending--;
 428                         if ( !this.pending ) {
 429                                 this.element.removeClass( "ui-autocomplete-loading" );
 430                         }
 431                 }, this );
 432         },
 433
 434         __response: function( content ) {
 435                 if ( content ) {
 436                         content = this._normalize( content );
 437                 }
 438                 this._trigger( "response", null, { content: content } );
 439                 if ( !this.options.disabled && content && content.length && !this.cancelSearch ) {
 440                         this._suggest( content );
 441                         this._trigger( "open" );
 442                 } else {
 443                         // use ._close() instead of .close() so we don't cancel future searches
 444                         this._close();
 445                 }
 446         },
 447
 448         close: function( event ) {
 449                 this.cancelSearch = true;
 450                 this._close( event );
 451         },
 452
 453         _close: function( event ) {
 454                 if ( this.menu.element.is( ":visible" ) ) {
 455                         this.menu.element.hide();
 456                         this.menu.blur();
 457                         this.isNewMenu = true;
 458                         this._trigger( "close", event );
 459                 }
 460         },
 461
 462         _change: function( event ) {
 463                 if ( this.previous !== this._value() ) {
 464                         this._trigger( "change", event, { item: this.selectedItem } );
 465                 }
 466         },
 467
 468         _normalize: function( items ) {
 469                 // assume all items have the right format when the first item is complete
 470                 if ( items.length && items[0].label && items[0].value ) {
 471                         return items;
 472                 }
 473                 return $.map( items, function( item ) {
 474                         if ( typeof item === "string" ) {
 475                                 return {
 476                                         label: item,
 477                                         value: item
 478                                 };
 479                         }
 480                         return $.extend({
 481                                 label: item.label || item.value,
 482                                 value: item.value || item.label
 483                         }, item );
 484                 });
 485         },
 486
 487         _suggest: function( items ) {
 488                 var ul = this.menu.element.empty();
 489                 this._renderMenu( ul, items );
 490                 this.isNewMenu = true;
 491                 this.menu.refresh();
 492
 493                 // size and position menu
 494                 ul.show();
 495                 this._resizeMenu();
 496                 ul.position( $.extend({
 497                         of: this.element
 498                 }, this.options.position ));
 499
 500                 if ( this.options.autoFocus ) {
 501                         this.menu.next();
 502                 }
 503         },
 504
 505         _resizeMenu: function() {
 506                 var ul = this.menu.element;
 507                 ul.outerWidth( Math.max(
 508                         // Firefox wraps long text (possibly a rounding bug)
 509                         // so we add 1px to avoid the wrapping (#7513)
 510                         ul.width( "" ).outerWidth() + 1,
 511                         this.element.outerWidth()
 512                 ) );
 513         },
 514
 515         _renderMenu: function( ul, items ) {
 516                 var that = this;
 517                 $.each( items, function( index, item ) {
 518                         that._renderItemData( ul, item );
 519                 });
 520         },
 521
 522         _renderItemData: function( ul, item ) {
 523                 return this._renderItem( ul, item ).data( "ui-autocomplete-item", item );
 524         },
 525
 526         _renderItem: function( ul, item ) {
 527                 return $( "<li>" )
 528                         .append( $( "<a>" ).text( item.label ) )
 529                         .appendTo( ul );
 530         },
 531
 532         _move: function( direction, event ) {
 533                 if ( !this.menu.element.is( ":visible" ) ) {
 534                         this.search( null, event );
 535                         return;
 536                 }
 537                 if ( this.menu.isFirstItem() && /^previous/.test( direction ) ||
 538                                 this.menu.isLastItem() && /^next/.test( direction ) ) {
 539                         this._value( this.term );
 540                         this.menu.blur();
 541                         return;
 542                 }
 543                 this.menu[ direction ]( event );
 544         },
 545
 546         widget: function() {
 547                 return this.menu.element;
 548         },
 549
 550         _value: function() {
 551                 return this.valueMethod.apply( this.element, arguments );
 552         },
 553
 554         _keyEvent: function( keyEvent, event ) {
 555                 if ( !this.isMultiLine || this.menu.element.is( ":visible" ) ) {
 556                         this._move( keyEvent, event );
 557
 558                         // prevents moving cursor to beginning/end of the text field in some browsers
 559                         event.preventDefault();
 560                 }
 561         }
 562 });
 563
 564 $.extend( $.ui.autocomplete, {
 565         escapeRegex: function( value ) {
 566                 return value.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
 567         },
 568         filter: function(array, term) {
 569                 var matcher = new RegExp( $.ui.autocomplete.escapeRegex(term), "i" );
 570                 return $.grep( array, function(value) {
 571                         return matcher.test( value.label || value.value || value );
 572                 });
 573         }
 574 });
 575
 576
 577 // live region extension, adding a `messages` option
 578 // NOTE: This is an experimental API. We are still investigating
 579 // a full solution for string manipulation and internationalization.
 580 $.widget( "ui.autocomplete", $.ui.autocomplete, {
 581         options: {
 582                 messages: {
 583                         noResults: "No search results.",
 584                         results: function( amount ) {
 585                                 return amount + ( amount > 1 ? " results are" : " result is" ) +
 586                                         " available, use up and down arrow keys to navigate.";
 587                         }
 588                 }
 589         },
 590
 591         __response: function( content ) {
 592                 var message;
 593                 this._superApply( arguments );
 594                 if ( this.options.disabled || this.cancelSearch ) {
 595                         return;
 596                 }
 597                 if ( content && content.length ) {
 598                         message = this.options.messages.results( content.length );
 599                 } else {
 600                         message = this.options.messages.noResults;
 601                 }
 602                 this.liveRegion.text( message );
 603         }
 604 });
 605
 606 }( jQuery ));