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autocomplete.js (17607B)

---

 /*!
  * jQuery UI Autocomplete 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license.
  * http://jquery.org/license
  */
 
 //>>label: Autocomplete
 //>>group: Widgets
 //>>description: Lists suggested words as the user is typing.
 //>>docs: http://api.jqueryui.com/autocomplete/
 //>>demos: http://jqueryui.com/autocomplete/
 //>>css.structure: ../../themes/base/core.css
 //>>css.structure: ../../themes/base/autocomplete.css
 //>>css.theme: ../../themes/base/theme.css
 
 ( function( factory ) {
 	if ( typeof define === "function" && define.amd ) {
 
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
 			"./menu",
 			"./core"
 		], factory );
 	} else {
 
 		// Browser globals
 		factory( jQuery );
 	}
 }( function( $ ) {
 
 $.widget( "ui.autocomplete", {
 	version: "1.12.1",
 	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
 	},
 
 	requestIndex: 0,
 	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";
 
 		// Textareas are always multi-line
 		// Inputs are always single-line, even if inside a contentEditable element
 		// IE also treats inputs as contentEditable
 		// All other element types are determined by whether or not they're contentEditable
 		this.isMultiLine = isTextarea || !isInput && this._isContentEditable( this.element );
 
 		this.valueMethod = this.element[ isTextarea || isInput ? "val" : "text" ];
 		this.isNewMenu = true;
 
 		this._addClass( "ui-autocomplete-input" );
 		this.element.attr( "autocomplete", "off" );
 
 		this._on( this.element, {
 			keydown: function( event ) {
 				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:
 
 					// 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" ) ) {
 						if ( !this.isMultiLine ) {
 							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>" )
 			.appendTo( this._appendTo() )
 			.menu( {
 
 				// disable ARIA support, the live region takes care of that
 				role: null
 			} )
 			.hide()
 			.menu( "instance" );
 
 		this._addClass( this.menu.element, "ui-autocomplete", "ui-front" );
 		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;
 
 					// Support: IE 8 only
 					// Right clicking a menu item or selecting text from the menu items will
 					// result in focus moving out of the input. However, we've already received
 					// and ignored the blur event because of the cancelBlur flag set above. So
 					// we restore focus to ensure that the menu closes properly based on the user's
 					// next actions.
 					if ( this.element[ 0 ] !== $.ui.safeActiveElement( this.document[ 0 ] ) ) {
 						this.element.trigger( "focus" );
 					}
 				} );
 			},
 			menufocus: function( event, ui ) {
 				var label, item;
 
 				// 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;
 					}
 				}
 
 				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 );
 					}
 				}
 
 				// Announce the value in the liveRegion
 				label = ui.item.attr( "aria-label" ) || item.value;
 				if ( label && $.trim( label ).length ) {
 					this.liveRegion.children().hide();
 					$( "<div>" ).text( label ).appendTo( this.liveRegion );
 				}
 			},
 			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 ] !== $.ui.safeActiveElement( this.document[ 0 ] ) ) {
 					this.element.trigger( "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 = $( "<div>", {
 			role: "status",
 			"aria-live": "assertive",
 			"aria-relevant": "additions"
 		} )
 			.appendTo( this.document[ 0 ].body );
 
 		this._addClass( this.liveRegion, null, "ui-helper-hidden-accessible" );
 
 		// 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.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();
 		}
 	},
 
 	_isEventTargetInWidget: function( event ) {
 		var menuElement = this.menu.element[ 0 ];
 
 		return event.target === this.element[ 0 ] ||
 			event.target === menuElement ||
 			$.contains( menuElement, event.target );
 	},
 
 	_closeOnClickOutside: function( event ) {
 		if ( !this._isEventTargetInWidget( event ) ) {
 			this.close();
 		}
 	},
 
 	_appendTo: function() {
 		var element = this.options.appendTo;
 
 		if ( element ) {
 			element = element.jquery || element.nodeType ?
 				$( element ) :
 				this.document.find( element ).eq( 0 );
 		}
 
 		if ( !element || !element[ 0 ] ) {
 			element = this.element.closest( ".ui-front, dialog" );
 		}
 
 		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() {
 
 			// Search if the value has changed, or if the user retypes the same value (see #7434)
 			var equalValues = this.term === this._value(),
 				menuVisible = this.menu.element.is( ":visible" ),
 				modifierKey = event.altKey || event.ctrlKey || event.metaKey || event.shiftKey;
 
 			if ( !equalValues || ( equalValues && !menuVisible && !modifierKey ) ) {
 				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._addClass( "ui-autocomplete-loading" );
 		this.cancelSearch = false;
 
 		this.source( { term: value }, this._response() );
 	},
 
 	_response: function() {
 		var index = ++this.requestIndex;
 
 		return $.proxy( function( content ) {
 			if ( index === this.requestIndex ) {
 				this.__response( content );
 			}
 
 			this.pending--;
 			if ( !this.pending ) {
 				this._removeClass( "ui-autocomplete-loading" );
 			}
 		}, this );
 	},
 
 	__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 ) {
 
 		// Remove the handler that closes the menu on outside clicks
 		this._off( this.document, "mousedown" );
 
 		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( {}, item, {
 				label: item.label || item.value,
 				value: item.value || item.label
 			} );
 		} );
 	},
 
 	_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();
 		}
 
 		// Listen for interactions outside of the widget (#6642)
 		this._on( this.document, {
 			mousedown: "_closeOnClickOutside"
 		} );
 	},
 
 	_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( $( "<div>" ).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 ) ) {
 
 			if ( !this.isMultiLine ) {
 				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();
 		}
 	},
 
 	// Support: Chrome <=50
 	// We should be able to just use this.element.prop( "isContentEditable" )
 	// but hidden elements always report false in Chrome.
 	// https://code.google.com/p/chromium/issues/detail?id=313082
 	_isContentEditable: function( element ) {
 		if ( !element.length ) {
 			return false;
 		}
 
 		var editable = element.prop( "contentEditable" );
 
 		if ( editable === "inherit" ) {
 		  return this._isContentEditable( element.parent() );
 		}
 
 		return editable === "true";
 	}
 } );
 
 $.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.children().hide();
 		$( "<div>" ).text( message ).appendTo( this.liveRegion );
 	}
 } );
 
 return $.ui.autocomplete;
 
 } ) );