jquery-ui-1.10.3/ui/jquery.ui.autocomplete.js

/*!
 * jQuery UI Autocomplete 1.10.3
 * http://jqueryui.com
 *
 * Copyright 2013 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/autocomplete/
 *
 * Depends:
 *      jquery.ui.core.js
 *      jquery.ui.widget.js
 *      jquery.ui.position.js
 *      jquery.ui.menu.js
 */
(function( $, undefined ) {

// used to prevent race conditions with remote data sources
var requestIndex = 0;

$.widget( "ui.autocomplete", {
        version: "1.10.3",
        defaultElement: "<input>",
        options: {
                appendTo: null,
                autoFocus: false,
                delay: 300,
                minLength: 1,
                position: {
                        my: "left top",
                        at: "left bottom",
                        collision: "none"
                },
                source: null,

                // callbacks
                change: null,
                close: null,
                focus: null,
                open: null,
                response: null,
                search: null,
                select: null
        },

        pending: 0,

        _create: function() {
                // Some browsers only repeat keydown events, not keypress events,
                // so we use the suppressKeyPress flag to determine if we've already
                // handled the keydown event. #7269
                // Unfortunately the code for & in keypress is the same as the up arrow,
                // so we use the suppressKeyPressRepeat flag to avoid handling keypress
                // events when we know the keydown event was used to modify the
                // search term. #7799
                var suppressKeyPress, suppressKeyPressRepeat, suppressInput,
                        nodeName = this.element[0].nodeName.toLowerCase(),
                        isTextarea = nodeName === "textarea",
                        isInput = nodeName === "input";

                this.isMultiLine =
                        // Textareas are always multi-line
                        isTextarea ? true :
                        // Inputs are always single-line, even if inside a contentEditable element
                        // IE also treats inputs as contentEditable
                        isInput ? false :
                        // All other element types are determined by whether or not they're contentEditable
                        this.element.prop( "isContentEditable" );

                this.valueMethod = this.element[ isTextarea || isInput ? "val" : "text" ];
                this.isNewMenu = true;

                this.element
                        .addClass( "ui-autocomplete-input" )
                        .attr( "autocomplete", "off" );

                this._on( this.element, {
                        keydown: function( event ) {
                                /*jshint maxcomplexity:15*/
                                if ( this.element.prop( "readOnly" ) ) {
                                        suppressKeyPress = true;
                                        suppressInput = true;
                                        suppressKeyPressRepeat = true;
                                        return;
                                }

                                suppressKeyPress = false;
                                suppressInput = false;
                                suppressKeyPressRepeat = false;
                                var keyCode = $.ui.keyCode;
                                switch( event.keyCode ) {
                                case keyCode.PAGE_UP:
                                        suppressKeyPress = true;
                                        this._move( "previousPage", event );
                                        break;
                                case keyCode.PAGE_DOWN:
                                        suppressKeyPress = true;
                                        this._move( "nextPage", event );
                                        break;
                                case keyCode.UP:
                                        suppressKeyPress = true;
                                        this._keyEvent( "previous", event );
                                        break;
                                case keyCode.DOWN:
                                        suppressKeyPress = true;
                                        this._keyEvent( "next", event );
                                        break;
                                case keyCode.ENTER:
                                case keyCode.NUMPAD_ENTER:
                                        // when menu is open and has focus
                                        if ( this.menu.active ) {
                                                // #6055 - Opera still allows the keypress to occur
                                                // which causes forms to submit
                                                suppressKeyPress = true;
                                                event.preventDefault();
                                                this.menu.select( event );
                                        }
                                        break;
                                case keyCode.TAB:
                                        if ( this.menu.active ) {
                                                this.menu.select( event );
                                        }
                                        break;
                                case keyCode.ESCAPE:
                                        if ( this.menu.element.is( ":visible" ) ) {
                                                this._value( this.term );
                                                this.close( event );
                                                // Different browsers have different default behavior for escape
                                                // Single press can mean undo or clear
                                                // Double press in IE means clear the whole form
                                                event.preventDefault();
                                        }
                                        break;
                                default:
                                        suppressKeyPressRepeat = true;
                                        // search timeout should be triggered before the input value is changed
                                        this._searchTimeout( event );
                                        break;
                                }
                        },
                        keypress: function( event ) {
                                if ( suppressKeyPress ) {
                                        suppressKeyPress = false;
                                        if ( !this.isMultiLine || this.menu.element.is( ":visible" ) ) {
                                                event.preventDefault();
                                        }
                                        return;
                                }
                                if ( suppressKeyPressRepeat ) {
                                        return;
                                }

                                // replicate some key handlers to allow them to repeat in Firefox and Opera
                                var keyCode = $.ui.keyCode;
                                switch( event.keyCode ) {
                                case keyCode.PAGE_UP:
                                        this._move( "previousPage", event );
                                        break;
                                case keyCode.PAGE_DOWN:
                                        this._move( "nextPage", event );
                                        break;
                                case keyCode.UP:
                                        this._keyEvent( "previous", event );
                                        break;
                                case keyCode.DOWN:
                                        this._keyEvent( "next", event );
                                        break;
                                }
                        },
                        input: function( event ) {
                                if ( suppressInput ) {
                                        suppressInput = false;
                                        event.preventDefault();
                                        return;
                                }
                                this._searchTimeout( event );
                        },
                        focus: function() {
                                this.selectedItem = null;
                                this.previous = this._value();
                        },
                        blur: function( event ) {
                                if ( this.cancelBlur ) {
                                        delete this.cancelBlur;
                                        return;
                                }

                                clearTimeout( this.searching );
                                this.close( event );
                                this._change( event );
                        }
                });

                this._initSource();
                this.menu = $( "<ul>" )
                        .addClass( "ui-autocomplete ui-front" )
                        .appendTo( this._appendTo() )
                        .menu({
                                // disable ARIA support, the live region takes care of that
                                role: null
                        })
                        .hide()
                        .data( "ui-menu" );

                this._on( this.menu.element, {
                        mousedown: function( event ) {
                                // prevent moving focus out of the text field
                                event.preventDefault();

                                // IE doesn't prevent moving focus even with event.preventDefault()
                                // so we set a flag to know when we should ignore the blur event
                                this.cancelBlur = true;
                                this._delay(function() {
                                        delete this.cancelBlur;
                                });

                                // clicking on the scrollbar causes focus to shift to the body
                                // but we can't detect a mouseup or a click immediately afterward
                                // so we have to track the next mousedown and close the menu if
                                // the user clicks somewhere outside of the autocomplete
                                var menuElement = this.menu.element[ 0 ];
                                if ( !$( event.target ).closest( ".ui-menu-item" ).length ) {
                                        this._delay(function() {
                                                var that = this;
                                                this.document.one( "mousedown", function( event ) {
                                                        if ( event.target !== that.element[ 0 ] &&
                                                                        event.target !== menuElement &&
                                                                        !$.contains( menuElement, event.target ) ) {
                                                                that.close();
                                                        }
                                                });
                                        });
                                }
                        },
                        menufocus: function( event, ui ) {
                                // support: Firefox
                                // Prevent accidental activation of menu items in Firefox (#7024 #9118)
                                if ( this.isNewMenu ) {
                                        this.isNewMenu = false;
                                        if ( event.originalEvent && /^mouse/.test( event.originalEvent.type ) ) {
                                                this.menu.blur();

                                                this.document.one( "mousemove", function() {
                                                        $( event.target ).trigger( event.originalEvent );
                                                });

                                                return;
                                        }
                                }

                                var item = ui.item.data( "ui-autocomplete-item" );
                                if ( false !== this._trigger( "focus", event, { item: item } ) ) {
                                        // use value to match what will end up in the input, if it was a key event
                                        if ( event.originalEvent && /^key/.test( event.originalEvent.type ) ) {
                                                this._value( item.value );
                                        }
                                } else {
                                        // Normally the input is populated with the item's value as the
                                        // menu is navigated, causing screen readers to notice a change and
                                        // announce the item. Since the focus event was canceled, this doesn't
                                        // happen, so we update the live region so that screen readers can
                                        // still notice the change and announce it.
                                        this.liveRegion.text( item.value );
                                }
                        },
                        menuselect: function( event, ui ) {
                                var item = ui.item.data( "ui-autocomplete-item" ),
                                        previous = this.previous;

                                // only trigger when focus was lost (click on menu)
                                if ( this.element[0] !== this.document[0].activeElement ) {
                                        this.element.focus();
                                        this.previous = previous;
                                        // #6109 - IE triggers two focus events and the second
                                        // is asynchronous, so we need to reset the previous
                                        // term synchronously and asynchronously :-(
                                        this._delay(function() {
                                                this.previous = previous;
                                                this.selectedItem = item;
                                        });
                                }

                                if ( false !== this._trigger( "select", event, { item: item } ) ) {
                                        this._value( item.value );
                                }
                                // reset the term after the select event
                                // this allows custom select handling to work properly
                                this.term = this._value();

                                this.close( event );
                                this.selectedItem = item;
                        }
                });

                this.liveRegion = $( "<span>", {
                                role: "status",
                                "aria-live": "polite"
                        })
                        .addClass( "ui-helper-hidden-accessible" )
                        .insertBefore( this.element );

                // turning off autocomplete prevents the browser from remembering the
                // value when navigating through history, so we re-enable autocomplete
                // if the page is unloaded before the widget is destroyed. #7790
                this._on( this.window, {
                        beforeunload: function() {
                                this.element.removeAttr( "autocomplete" );
                        }
                });
        },

        _destroy: function() {
                clearTimeout( this.searching );
                this.element
                        .removeClass( "ui-autocomplete-input" )
                        .removeAttr( "autocomplete" );
                this.menu.element.remove();
                this.liveRegion.remove();
        },

        _setOption: function( key, value ) {
                this._super( key, value );
                if ( key === "source" ) {
                        this._initSource();
                }
                if ( key === "appendTo" ) {
                        this.menu.element.appendTo( this._appendTo() );
                }
                if ( key === "disabled" && value && this.xhr ) {
                        this.xhr.abort();
                }
        },

        _appendTo: function() {
                var element = this.options.appendTo;

                if ( element ) {
                        element = element.jquery || element.nodeType ?
                                $( element ) :
                                this.document.find( element ).eq( 0 );
                }

                if ( !element ) {
                        element = this.element.closest( ".ui-front" );
                }

                if ( !element.length ) {
                        element = this.document[0].body;
                }

                return element;
        },

        _initSource: function() {
                var array, url,
                        that = this;
                if ( $.isArray(this.options.source) ) {
                        array = this.options.source;
                        this.source = function( request, response ) {
                                response( $.ui.autocomplete.filter( array, request.term ) );
                        };
                } else if ( typeof this.options.source === "string" ) {
                        url = this.options.source;
                        this.source = function( request, response ) {
                                if ( that.xhr ) {
                                        that.xhr.abort();
                                }
                                that.xhr = $.ajax({
                                        url: url,
                                        data: request,
                                        dataType: "json",
                                        success: function( data ) {
                                                response( data );
                                        },
                                        error: function() {
                                                response( [] );
                                        }
                                });
                        };
                } else {
                        this.source = this.options.source;
                }
        },

        _searchTimeout: function( event ) {
                clearTimeout( this.searching );
                this.searching = this._delay(function() {
                        // only search if the value has changed
                        if ( this.term !== this._value() ) {
                                this.selectedItem = null;
                                this.search( null, event );
                        }
                }, this.options.delay );
        },

        search: function( value, event ) {
                value = value != null ? value : this._value();

                // always save the actual value, not the one passed as an argument
                this.term = this._value();

                if ( value.length < this.options.minLength ) {
                        return this.close( event );
                }

                if ( this._trigger( "search", event ) === false ) {
                        return;
                }

                return this._search( value );
        },

        _search: function( value ) {
                this.pending++;
                this.element.addClass( "ui-autocomplete-loading" );
                this.cancelSearch = false;

                this.source( { term: value }, this._response() );
        },

        _response: function() {
                var that = this,
                        index = ++requestIndex;

                return function( content ) {
                        if ( index === requestIndex ) {
                                that.__response( content );
                        }

                        that.pending--;
                        if ( !that.pending ) {
                                that.element.removeClass( "ui-autocomplete-loading" );
                        }
                };
        },

        __response: function( content ) {
                if ( content ) {
                        content = this._normalize( content );
                }
                this._trigger( "response", null, { content: content } );
                if ( !this.options.disabled && content && content.length && !this.cancelSearch ) {
                        this._suggest( content );
                        this._trigger( "open" );
                } else {
                        // use ._close() instead of .close() so we don't cancel future searches
                        this._close();
                }
        },

        close: function( event ) {
                this.cancelSearch = true;
                this._close( event );
        },

        _close: function( event ) {
                if ( this.menu.element.is( ":visible" ) ) {
                        this.menu.element.hide();
                        this.menu.blur();
                        this.isNewMenu = true;
                        this._trigger( "close", event );
                }
        },

        _change: function( event ) {
                if ( this.previous !== this._value() ) {
                        this._trigger( "change", event, { item: this.selectedItem } );
                }
        },

        _normalize: function( items ) {
                // assume all items have the right format when the first item is complete
                if ( items.length && items[0].label && items[0].value ) {
                        return items;
                }
                return $.map( items, function( item ) {
                        if ( typeof item === "string" ) {
                                return {
                                        label: item,
                                        value: item
                                };
                        }
                        return $.extend({
                                label: item.label || item.value,
                                value: item.value || item.label
                        }, item );
                });
        },

        _suggest: function( items ) {
                var ul = this.menu.element.empty();
                this._renderMenu( ul, items );
                this.isNewMenu = true;
                this.menu.refresh();

                // size and position menu
                ul.show();
                this._resizeMenu();
                ul.position( $.extend({
                        of: this.element
                }, this.options.position ));

                if ( this.options.autoFocus ) {
                        this.menu.next();
                }
        },

        _resizeMenu: function() {
                var ul = this.menu.element;
                ul.outerWidth( Math.max(
                        // Firefox wraps long text (possibly a rounding bug)
                        // so we add 1px to avoid the wrapping (#7513)
                        ul.width( "" ).outerWidth() + 1,
                        this.element.outerWidth()
                ) );
        },

        _renderMenu: function( ul, items ) {
                var that = this;
                $.each( items, function( index, item ) {
                        that._renderItemData( ul, item );
                });
        },

        _renderItemData: function( ul, item ) {
                return this._renderItem( ul, item ).data( "ui-autocomplete-item", item );
        },

        _renderItem: function( ul, item ) {
                return $( "<li>" )
                        .append( $( "<a>" ).text( item.label ) )
                        .appendTo( ul );
        },

        _move: function( direction, event ) {
                if ( !this.menu.element.is( ":visible" ) ) {
                        this.search( null, event );
                        return;
                }
                if ( this.menu.isFirstItem() && /^previous/.test( direction ) ||
                                this.menu.isLastItem() && /^next/.test( direction ) ) {
                        this._value( this.term );
                        this.menu.blur();
                        return;
                }
                this.menu[ direction ]( event );
        },

        widget: function() {
                return this.menu.element;
        },

        _value: function() {
                return this.valueMethod.apply( this.element, arguments );
        },

        _keyEvent: function( keyEvent, event ) {
                if ( !this.isMultiLine || this.menu.element.is( ":visible" ) ) {
                        this._move( keyEvent, event );

                        // prevents moving cursor to beginning/end of the text field in some browsers
                        event.preventDefault();
                }
        }
});

$.extend( $.ui.autocomplete, {
        escapeRegex: function( value ) {
                return value.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
        },
        filter: function(array, term) {
                var matcher = new RegExp( $.ui.autocomplete.escapeRegex(term), "i" );
                return $.grep( array, function(value) {
                        return matcher.test( value.label || value.value || value );
                });
        }
});


// live region extension, adding a `messages` option
// NOTE: This is an experimental API. We are still investigating
// a full solution for string manipulation and internationalization.
$.widget( "ui.autocomplete", $.ui.autocomplete, {
        options: {
                messages: {
                        noResults: "No search results.",
                        results: function( amount ) {
                                return amount + ( amount > 1 ? " results are" : " result is" ) +
                                        " available, use up and down arrow keys to navigate.";
                        }
                }
        },

        __response: function( content ) {
                var message;
                this._superApply( arguments );
                if ( this.options.disabled || this.cancelSearch ) {
                        return;
                }
                if ( content && content.length ) {
                        message = this.options.messages.results( content.length );
                } else {
                        message = this.options.messages.noResults;
                }
                this.liveRegion.text( message );
        }
});

}( jQuery ));
1	torben	2125	/*!
2			* jQuery UI Autocomplete 1.10.3
3			* http://jqueryui.com
4			*
5			* Copyright 2013 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			// used to prevent race conditions with remote data sources
20			var requestIndex = 0;
21
22			$.widget( "ui.autocomplete", {
23			version: "1.10.3",
24			defaultElement: "<input>",
25			options: {
26			appendTo: null,
27			autoFocus: false,
28			delay: 300,
29			minLength: 1,
30			position: {
31			my: "left top",
32			at: "left bottom",
33			collision: "none"
34			},
35			source: null,
36
37			// callbacks
38			change: null,
39			close: null,
40			focus: null,
41			open: null,
42			response: null,
43			search: null,
44			select: null
45			},
46
47			pending: 0,
48
49			_create: function() {
50			// Some browsers only repeat keydown events, not keypress events,
51			// so we use the suppressKeyPress flag to determine if we've already
52			// handled the keydown event. #7269
53			// Unfortunately the code for & in keypress is the same as the up arrow,
54			// so we use the suppressKeyPressRepeat flag to avoid handling keypress
55			// events when we know the keydown event was used to modify the
56			// search term. #7799
57			var suppressKeyPress, suppressKeyPressRepeat, suppressInput,
58			nodeName = this.element[0].nodeName.toLowerCase(),
59			isTextarea = nodeName === "textarea",
60			isInput = nodeName === "input";
61
62			this.isMultiLine =
63			// Textareas are always multi-line
64			isTextarea ? true :
65			// Inputs are always single-line, even if inside a contentEditable element
66			// IE also treats inputs as contentEditable
67			isInput ? false :
68			// All other element types are determined by whether or not they're contentEditable
69			this.element.prop( "isContentEditable" );
70
71			this.valueMethod = this.element[ isTextarea \|\| isInput ? "val" : "text" ];
72			this.isNewMenu = true;
73
74			this.element
75			.addClass( "ui-autocomplete-input" )
76			.attr( "autocomplete", "off" );
77
78			this._on( this.element, {
79			keydown: function( event ) {
80			/jshint maxcomplexity:15/
81			if ( this.element.prop( "readOnly" ) ) {
82			suppressKeyPress = true;
83			suppressInput = true;
84			suppressKeyPressRepeat = true;
85			return;
86			}
87
88			suppressKeyPress = false;
89			suppressInput = false;
90			suppressKeyPressRepeat = false;
91			var keyCode = $.ui.keyCode;
92			switch( event.keyCode ) {
93			case keyCode.PAGE_UP:
94			suppressKeyPress = true;
95			this._move( "previousPage", event );
96			break;
97			case keyCode.PAGE_DOWN:
98			suppressKeyPress = true;
99			this._move( "nextPage", event );
100			break;
101			case keyCode.UP:
102			suppressKeyPress = true;
103			this._keyEvent( "previous", event );
104			break;
105			case keyCode.DOWN:
106			suppressKeyPress = true;
107			this._keyEvent( "next", event );
108			break;
109			case keyCode.ENTER:
110			case keyCode.NUMPAD_ENTER:
111			// when menu is open and has focus
112			if ( this.menu.active ) {
113			// #6055 - Opera still allows the keypress to occur
114			// which causes forms to submit
115			suppressKeyPress = true;
116			event.preventDefault();
117			this.menu.select( event );
118			}
119			break;
120			case keyCode.TAB:
121			if ( this.menu.active ) {
122			this.menu.select( event );
123			}
124			break;
125			case keyCode.ESCAPE:
126			if ( this.menu.element.is( ":visible" ) ) {
127			this._value( this.term );
128			this.close( event );
129			// Different browsers have different default behavior for escape
130			// Single press can mean undo or clear
131			// Double press in IE means clear the whole form
132			event.preventDefault();
133			}
134			break;
135			default:
136			suppressKeyPressRepeat = true;
137			// search timeout should be triggered before the input value is changed
138			this._searchTimeout( event );
139			break;
140			}
141			},
142			keypress: function( event ) {
143			if ( suppressKeyPress ) {
144			suppressKeyPress = false;
145			if ( !this.isMultiLine \|\| this.menu.element.is( ":visible" ) ) {
146			event.preventDefault();
147			}
148			return;
149			}
150			if ( suppressKeyPressRepeat ) {
151			return;
152			}
153
154			// replicate some key handlers to allow them to repeat in Firefox and Opera
155			var keyCode = $.ui.keyCode;
156			switch( event.keyCode ) {
157			case keyCode.PAGE_UP:
158			this._move( "previousPage", event );
159			break;
160			case keyCode.PAGE_DOWN:
161			this._move( "nextPage", event );
162			break;
163			case keyCode.UP:
164			this._keyEvent( "previous", event );
165			break;
166			case keyCode.DOWN:
167			this._keyEvent( "next", event );
168			break;
169			}
170			},
171			input: function( event ) {
172			if ( suppressInput ) {
173			suppressInput = false;
174			event.preventDefault();
175			return;
176			}
177			this._searchTimeout( event );
178			},
179			focus: function() {
180			this.selectedItem = null;
181			this.previous = this._value();
182			},
183			blur: function( event ) {
184			if ( this.cancelBlur ) {
185			delete this.cancelBlur;
186			return;
187			}
188
189			clearTimeout( this.searching );
190			this.close( event );
191			this._change( event );
192			}
193			});
194
195			this._initSource();
196			this.menu = $( "<ul>" )
197			.addClass( "ui-autocomplete ui-front" )
198			.appendTo( this._appendTo() )
199			.menu({
200			// disable ARIA support, the live region takes care of that
201			role: null
202			})
203			.hide()
204			.data( "ui-menu" );
205
206			this._on( this.menu.element, {
207			mousedown: function( event ) {
208			// prevent moving focus out of the text field
209			event.preventDefault();
210
211			// IE doesn't prevent moving focus even with event.preventDefault()
212			// so we set a flag to know when we should ignore the blur event
213			this.cancelBlur = true;
214			this._delay(function() {
215			delete this.cancelBlur;
216			});
217
218			// clicking on the scrollbar causes focus to shift to the body
219			// but we can't detect a mouseup or a click immediately afterward
220			// so we have to track the next mousedown and close the menu if
221			// the user clicks somewhere outside of the autocomplete
222			var menuElement = this.menu.element[ 0 ];
223			if ( !$( event.target ).closest( ".ui-menu-item" ).length ) {
224			this._delay(function() {
225			var that = this;
226			this.document.one( "mousedown", function( event ) {
227			if ( event.target !== that.element[ 0 ] &&
228			event.target !== menuElement &&
229			!$.contains( menuElement, event.target ) ) {
230			that.close();
231			}
232			});
233			});
234			}
235			},
236			menufocus: function( event, ui ) {
237			// support: Firefox
238			// Prevent accidental activation of menu items in Firefox (#7024 #9118)
239			if ( this.isNewMenu ) {
240			this.isNewMenu = false;
241			if ( event.originalEvent && /^mouse/.test( event.originalEvent.type ) ) {
242			this.menu.blur();
243
244			this.document.one( "mousemove", function() {
245			$( event.target ).trigger( event.originalEvent );
246			});
247
248			return;
249			}
250			}
251
252			var item = ui.item.data( "ui-autocomplete-item" );
253			if ( false !== this._trigger( "focus", event, { item: item } ) ) {
254			// use value to match what will end up in the input, if it was a key event
255			if ( event.originalEvent && /^key/.test( event.originalEvent.type ) ) {
256			this._value( item.value );
257			}
258			} else {
259			// Normally the input is populated with the item's value as the
260			// menu is navigated, causing screen readers to notice a change and
261			// announce the item. Since the focus event was canceled, this doesn't
262			// happen, so we update the live region so that screen readers can
263			// still notice the change and announce it.
264			this.liveRegion.text( item.value );
265			}
266			},
267			menuselect: function( event, ui ) {
268			var item = ui.item.data( "ui-autocomplete-item" ),
269			previous = this.previous;
270
271			// only trigger when focus was lost (click on menu)
272			if ( this.element[0] !== this.document[0].activeElement ) {
273			this.element.focus();
274			this.previous = previous;
275			// #6109 - IE triggers two focus events and the second
276			// is asynchronous, so we need to reset the previous
277			// term synchronously and asynchronously :-(
278			this._delay(function() {
279			this.previous = previous;
280			this.selectedItem = item;
281			});
282			}
283
284			if ( false !== this._trigger( "select", event, { item: item } ) ) {
285			this._value( item.value );
286			}
287			// reset the term after the select event
288			// this allows custom select handling to work properly
289			this.term = this._value();
290
291			this.close( event );
292			this.selectedItem = item;
293			}
294			});
295
296			this.liveRegion = $( "<span>", {
297			role: "status",
298			"aria-live": "polite"
299			})
300			.addClass( "ui-helper-hidden-accessible" )
301			.insertBefore( this.element );
302
303			// turning off autocomplete prevents the browser from remembering the
304			// value when navigating through history, so we re-enable autocomplete
305			// if the page is unloaded before the widget is destroyed. #7790
306			this._on( this.window, {
307			beforeunload: function() {
308			this.element.removeAttr( "autocomplete" );
309			}
310			});
311			},
312
313			_destroy: function() {
314			clearTimeout( this.searching );
315			this.element
316			.removeClass( "ui-autocomplete-input" )
317			.removeAttr( "autocomplete" );
318			this.menu.element.remove();
319			this.liveRegion.remove();
320			},
321
322			_setOption: function( key, value ) {
323			this._super( key, value );
324			if ( key === "source" ) {
325			this._initSource();
326			}
327			if ( key === "appendTo" ) {
328			this.menu.element.appendTo( this._appendTo() );
329			}
330			if ( key === "disabled" && value && this.xhr ) {
331			this.xhr.abort();
332			}
333			},
334
335			_appendTo: function() {
336			var element = this.options.appendTo;
337
338			if ( element ) {
339			element = element.jquery \|\| element.nodeType ?
340			$( element ) :
341			this.document.find( element ).eq( 0 );
342			}
343
344			if ( !element ) {
345			element = this.element.closest( ".ui-front" );
346			}
347
348			if ( !element.length ) {
349			element = this.document[0].body;
350			}
351
352			return element;
353			},
354
355			_initSource: function() {
356			var array, url,
357			that = this;
358			if ( $.isArray(this.options.source) ) {
359			array = this.options.source;
360			this.source = function( request, response ) {
361			response( $.ui.autocomplete.filter( array, request.term ) );
362			};
363			} else if ( typeof this.options.source === "string" ) {
364			url = this.options.source;
365			this.source = function( request, response ) {
366			if ( that.xhr ) {
367			that.xhr.abort();
368			}
369			that.xhr = $.ajax({
370			url: url,
371			data: request,
372			dataType: "json",
373			success: function( data ) {
374			response( data );
375			},
376			error: function() {
377			response( [] );
378			}
379			});
380			};
381			} else {
382			this.source = this.options.source;
383			}
384			},
385
386			_searchTimeout: function( event ) {
387			clearTimeout( this.searching );
388			this.searching = this._delay(function() {
389			// only search if the value has changed
390			if ( this.term !== this._value() ) {
391			this.selectedItem = null;
392			this.search( null, event );
393			}
394			}, this.options.delay );
395			},
396
397			search: function( value, event ) {
398			value = value != null ? value : this._value();
399
400			// always save the actual value, not the one passed as an argument
401			this.term = this._value();
402
403			if ( value.length < this.options.minLength ) {
404			return this.close( event );
405			}
406
407			if ( this._trigger( "search", event ) === false ) {
408			return;
409			}
410
411			return this._search( value );
412			},
413
414			_search: function( value ) {
415			this.pending++;
416			this.element.addClass( "ui-autocomplete-loading" );
417			this.cancelSearch = false;
418
419			this.source( { term: value }, this._response() );
420			},
421
422			_response: function() {
423			var that = this,
424			index = ++requestIndex;
425
426			return function( content ) {
427			if ( index === requestIndex ) {
428			that.__response( content );
429			}
430
431			that.pending--;
432			if ( !that.pending ) {
433			that.element.removeClass( "ui-autocomplete-loading" );
434			}
435			};
436			},
437
438			__response: function( content ) {
439			if ( content ) {
440			content = this._normalize( content );
441			}
442			this._trigger( "response", null, { content: content } );
443			if ( !this.options.disabled && content && content.length && !this.cancelSearch ) {
444			this._suggest( content );
445			this._trigger( "open" );
446			} else {
447			// use ._close() instead of .close() so we don't cancel future searches
448			this._close();
449			}
450			},
451
452			close: function( event ) {
453			this.cancelSearch = true;
454			this._close( event );
455			},
456
457			_close: function( event ) {
458			if ( this.menu.element.is( ":visible" ) ) {
459			this.menu.element.hide();
460			this.menu.blur();
461			this.isNewMenu = true;
462			this._trigger( "close", event );
463			}
464			},
465
466			_change: function( event ) {
467			if ( this.previous !== this._value() ) {
468			this._trigger( "change", event, { item: this.selectedItem } );
469			}
470			},
471
472			_normalize: function( items ) {
473			// assume all items have the right format when the first item is complete
474			if ( items.length && items[0].label && items[0].value ) {
475			return items;
476			}
477			return $.map( items, function( item ) {
478			if ( typeof item === "string" ) {
479			return {
480			label: item,
481			value: item
482			};
483			}
484			return $.extend({
485			label: item.label \|\| item.value,
486			value: item.value \|\| item.label
487			}, item );
488			});
489			},
490
491			_suggest: function( items ) {
492			var ul = this.menu.element.empty();
493			this._renderMenu( ul, items );
494			this.isNewMenu = true;
495			this.menu.refresh();
496
497			// size and position menu
498			ul.show();
499			this._resizeMenu();
500			ul.position( $.extend({
501			of: this.element
502			}, this.options.position ));
503
504			if ( this.options.autoFocus ) {
505			this.menu.next();
506			}
507			},
508
509			_resizeMenu: function() {
510			var ul = this.menu.element;
511			ul.outerWidth( Math.max(
512			// Firefox wraps long text (possibly a rounding bug)
513			// so we add 1px to avoid the wrapping (#7513)
514			ul.width( "" ).outerWidth() + 1,
515			this.element.outerWidth()
516			) );
517			},
518
519			_renderMenu: function( ul, items ) {
520			var that = this;
521			$.each( items, function( index, item ) {
522			that._renderItemData( ul, item );
523			});
524			},
525
526			_renderItemData: function( ul, item ) {
527			return this._renderItem( ul, item ).data( "ui-autocomplete-item", item );
528			},
529
530			_renderItem: function( ul, item ) {
531			return $( "<li>" )
532			.append( $( "<a>" ).text( item.label ) )
533			.appendTo( ul );
534			},
535
536			_move: function( direction, event ) {
537			if ( !this.menu.element.is( ":visible" ) ) {
538			this.search( null, event );
539			return;
540			}
541			if ( this.menu.isFirstItem() && /^previous/.test( direction ) \|\|
542			this.menu.isLastItem() && /^next/.test( direction ) ) {
543			this._value( this.term );
544			this.menu.blur();
545			return;
546			}
547			this.menu[ direction ]( event );
548			},
549
550			widget: function() {
551			return this.menu.element;
552			},
553
554			_value: function() {
555			return this.valueMethod.apply( this.element, arguments );
556			},
557
558			_keyEvent: function( keyEvent, event ) {
559			if ( !this.isMultiLine \|\| this.menu.element.is( ":visible" ) ) {
560			this._move( keyEvent, event );
561
562			// prevents moving cursor to beginning/end of the text field in some browsers
563			event.preventDefault();
564			}
565			}
566			});
567
568			$.extend( $.ui.autocomplete, {
569			escapeRegex: function( value ) {
570			return value.replace(/[\-\[\]{}()*+?.,\\\^$\|#\s]/g, "\\$&");
571			},
572			filter: function(array, term) {
573			var matcher = new RegExp( $.ui.autocomplete.escapeRegex(term), "i" );
574			return $.grep( array, function(value) {
575			return matcher.test( value.label \|\| value.value \|\| value );
576			});
577			}
578			});
579
580
581			// live region extension, adding a `messages` option
582			// NOTE: This is an experimental API. We are still investigating
583			// a full solution for string manipulation and internationalization.
584			$.widget( "ui.autocomplete", $.ui.autocomplete, {
585			options: {
586			messages: {
587			noResults: "No search results.",
588			results: function( amount ) {
589			return amount + ( amount > 1 ? " results are" : " result is" ) +
590			" available, use up and down arrow keys to navigate.";
591			}
592			}
593			},
594
595			__response: function( content ) {
596			var message;
597			this._superApply( arguments );
598			if ( this.options.disabled \|\| this.cancelSearch ) {
599			return;
600			}
601			if ( content && content.length ) {
602			message = this.options.messages.results( content.length );
603			} else {
604			message = this.options.messages.noResults;
605			}
606			this.liveRegion.text( message );
607			}
608			});
609
610			}( jQuery ));