path: root/src/event.js

(function( jQuery ) {

var rnamespaces = /\.(.*)$/,
	rformElems = /^(?:textarea|input|select)$/i,
	rperiod = /\./g,
	rspace = / /g,
	rescape = /[^\w\s.|`]/g,
	fcleanup = function( nm ) {
		return nm.replace(rescape, "\\$&");
	},
	focusCounts = { focusin: 0, focusout: 0 };

/*
 * A number of helper functions used for managing events.
 * Many of the ideas behind this code originated from
 * Dean Edwards' addEvent library.
 */
jQuery.event = {

	// Bind an event to an element
	// Original by Dean Edwards
	add: function( elem, types, handler, data ) {
		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
			return;
		}

		// For whatever reason, IE has trouble passing the window object
		// around, causing it to be cloned in the process
		if ( jQuery.isWindow( elem ) && ( elem !== window && !elem.frameElement ) ) {
			elem = window;
		}

		if ( handler === false ) {
			handler = returnFalse;
		} else if ( !handler ) {
		  // Fixes bug #7229. Fix recommended by jdalton
		  return;
		}

		var handleObjIn, handleObj;

		if ( handler.handler ) {
			handleObjIn = handler;
			handler = handleObjIn.handler;
		}

		// Make sure that the function being executed has a unique ID
		if ( !handler.guid ) {
			handler.guid = jQuery.guid++;
		}

		// Init the element's event structure
		var elemData = jQuery.data( elem );

		// If no elemData is found then we must be trying to bind to one of the
		// banned noData elements
		if ( !elemData ) {
			return;
		}

		// Use a key less likely to result in collisions for plain JS objects.
		// Fixes bug #7150.
		var eventKey = elem.nodeType ? "events" : "__events__",
			events = elemData[ eventKey ],
			eventHandle = elemData.handle;
			
		if ( typeof events === "function" ) {
			// On plain objects events is a fn that holds the the data
			// which prevents this data from being JSON serialized
			// the function does not need to be called, it just contains the data
			eventHandle = events.handle;
			events = events.events;

		} else if ( !events ) {
			if ( !elem.nodeType ) {
				// On plain objects, create a fn that acts as the holder
				// of the values to avoid JSON serialization of event data
				elemData[ eventKey ] = elemData = function(){};
			}

			elemData.events = events = {};
		}

		if ( !eventHandle ) {
			elemData.handle = eventHandle = function() {
				// Handle the second event of a trigger and when
				// an event is called after a page has unloaded
				return typeof jQuery !== "undefined" && !jQuery.event.triggered ?
					jQuery.event.handle.apply( eventHandle.elem, arguments ) :
					undefined;
			};
		}

		// Add elem as a property of the handle function
		// This is to prevent a memory leak with non-native events in IE.
		eventHandle.elem = elem;

		// Handle multiple events separated by a space
		// jQuery(...).bind("mouseover mouseout", fn);
		types = types.split(" ");

		var type, i = 0, namespaces;

		while ( (type = types[ i++ ]) ) {
			handleObj = handleObjIn ?
				jQuery.extend({}, handleObjIn) :
				{ handler: handler, data: data };

			// Namespaced event handlers
			if ( type.indexOf(".") > -1 ) {
				namespaces = type.split(".");
				type = namespaces.shift();
				handleObj.namespace = namespaces.slice(0).sort().join(".");

			} else {
				namespaces = [];
				handleObj.namespace = "";
			}

			handleObj.type = type;
			if ( !handleObj.guid ) {
				handleObj.guid = handler.guid;
			}

			// Get the current list of functions bound to this event
			var handlers = events[ type ],
				special = jQuery.event.special[ type ] || {};

			// Init the event handler queue
			if ( !handlers ) {
				handlers = events[ type ] = [];

				// Check for a special event handler
				// Only use addEventListener/attachEvent if the special
				// events handler returns false
				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
					// Bind the global event handler to the element
					if ( elem.addEventListener ) {
						elem.addEventListener( type, eventHandle, false );

					} else if ( elem.attachEvent ) {
						elem.attachEvent( "on" + type, eventHandle );
					}
				}
			}
			
			if ( special.add ) { 
				special.add.call( elem, handleObj ); 

				if ( !handleObj.handler.guid ) {
					handleObj.handler.guid = handler.guid;
				}
			}

			// Add the function to the element's handler list
			handlers.push( handleObj );

			// Keep track of which events have been used, for global triggering
			jQuery.event.global[ type ] = true;
		}

		// Nullify elem to prevent memory leaks in IE
		elem = null;
	},

	global: {},

	// Detach an event or set of events from an element
	remove: function( elem, types, handler, pos ) {
		// don't do events on text and comment nodes
		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
			return;
		}

		if ( handler === false ) {
			handler = returnFalse;
		}

		var ret, type, fn, j, i = 0, all, namespaces, namespace, special, eventType, handleObj, origType,
			eventKey = elem.nodeType ? "events" : "__events__",
			elemData = jQuery.data( elem ),
			events = elemData && elemData[ eventKey ];

		if ( !elemData || !events ) {
			return;
		}
		
		if ( typeof events === "function" ) {
			elemData = events;
			events = events.events;
		}

		// types is actually an event object here
		if ( types && types.type ) {
			handler = types.handler;
			types = types.type;
		}

		// Unbind all events for the element
		if ( !types || typeof types === "string" && types.charAt(0) === "." ) {
			types = types || "";

			for ( type in events ) {
				jQuery.event.remove( elem, type + types );
			}

			return;
		}

		// Handle multiple events separated by a space
		// jQuery(...).unbind("mouseover mouseout", fn);
		types = types.split(" ");

		while ( (type = types[ i++ ]) ) {
			origType = type;
			handleObj = null;
			all = type.indexOf(".") < 0;
			namespaces = [];

			if ( !all ) {
				// Namespaced event handlers
				namespaces = type.split(".");
				type = namespaces.shift();

				namespace = new RegExp("(^|\\.)" + 
					jQuery.map( namespaces.slice(0).sort(), fcleanup ).join("\\.(?:.*\\.)?") + "(\\.|$)");
			}

			eventType = events[ type ];

			if ( !eventType ) {
				continue;
			}

			if ( !handler ) {
				for ( j = 0; j < eventType.length; j++ ) {
					handleObj = eventType[ j ];

					if ( all || namespace.test( handleObj.namespace ) ) {
						jQuery.event.remove( elem, origType, handleObj.handler, j );
						eventType.splice( j--, 1 );
					}
				}

				continue;
			}

			special = jQuery.event.special[ type ] || {};

			for ( j = pos || 0; j < eventType.length; j++ ) {
				handleObj = eventType[ j ];

				if ( handler.guid === handleObj.guid ) {
					// remove the given handler for the given type
					if ( all || namespace.test( handleObj.namespace ) ) {
						if ( pos == null ) {
							eventType.splice( j--, 1 );
						}

						if ( special.remove ) {
							special.remove.call( elem, handleObj );
						}
					}

					if ( pos != null ) {
						break;
					}
				}
			}

			// remove generic event handler if no more handlers exist
			if ( eventType.length === 0 || pos != null && eventType.length === 1 ) {
				if ( !special.teardown || special.teardown.call( elem, namespaces ) === false ) {
					jQuery.removeEvent( elem, type, elemData.handle );
				}

				ret = null;
				delete events[ type ];
			}
		}

		// Remove the expando if it's no longer used
		if ( jQuery.isEmptyObject( events ) ) {
			var handle = elemData.handle;
			if ( handle ) {
				handle.elem = null;
			}

			delete elemData.events;
			delete elemData.handle;

			if ( typeof elemData === "function" ) {
				jQuery.removeData( elem, eventKey );

			} else if ( jQuery.isEmptyObject( elemData ) ) {
				jQuery.removeData( elem );
			}
		}
	},

	// bubbling is internal
	trigger: function( event, data, elem /*, bubbling */ ) {
		// Event object or event type
		var type = event.type || event,
			bubbling = arguments[3];

		if ( !bubbling ) {
			event = typeof event === "object" ?
				// jQuery.Event object
				event[ jQuery.expando ] ? event :
				// Object literal
				jQuery.extend( jQuery.Event(type), event ) :
				// Just the event type (string)
				jQuery.Event(type);

			if ( type.indexOf("!") >= 0 ) {
				event.type = type = type.slice(0, -1);
				event.exclusive = true;
			}

			// Handle a global trigger
			if ( !elem ) {
				// Don't bubble custom events when global (to avoid too much overhead)
				event.stopPropagation();

				// Only trigger if we've ever bound an event for it
				if ( jQuery.event.global[ type ] ) {
					jQuery.each( jQuery.cache, function() {
						if ( this.events && this.events[type] ) {
							jQuery.event.trigger( event, data, this.handle.elem );
						}
					});
				}
			}

			// Handle triggering a single element

			// don't do events on text and comment nodes
			if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 ) {
				return undefined;
			}

			// Clean up in case it is reused
			event.result = undefined;
			event.target = elem;

			// Clone the incoming data, if any
			data = jQuery.makeArray( data );
			data.unshift( event );
		}

		event.currentTarget = elem;

		// Trigger the event, it is assumed that "handle" is a function
		var handle = elem.nodeType ?
			jQuery.data( elem, "handle" ) :
			(jQuery.data( elem, "__events__" ) || {}).handle;

		if ( handle ) {
			handle.apply( elem, data );
		}

		var parent = elem.parentNode || elem.ownerDocument;

		// Trigger an inline bound script
		try {
			if ( !(elem && elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()]) ) {
				if ( elem[ "on" + type ] && elem[ "on" + type ].apply( elem, data ) === false ) {
					event.result = false;
					event.preventDefault();
				}
			}

		// prevent IE from throwing an error for some elements with some event types, see #3533
		} catch (inlineError) {}

		if ( !event.isPropagationStopped() && parent ) {
			jQuery.event.trigger( event, data, parent, true );

		} else if ( !event.isDefaultPrevented() ) {
			var target = event.target, old, targetType = type.replace(rnamespaces, ""),
				isClick = jQuery.nodeName(target, "a") && targetType === "click",
				special = jQuery.event.special[ targetType ] || {};

			if ( (!special._default || special._default.call( elem, event ) === false) && 
				!isClick && !(target && target.nodeName && jQuery.noData[target.nodeName.toLowerCase()]) ) {

				try {
					if ( target[ targetType ] ) {
						// Make sure that we don't accidentally re-trigger the onFOO events
						old = target[ "on" + targetType ];

						if ( old ) {
							target[ "on" + targetType ] = null;
						}

						jQuery.event.triggered = true;
						target[ targetType ]();
					}

				// prevent IE from throwing an error for some elements with some event types, see #3533
				} catch (triggerError) {}

				if ( old ) {
					target[ "on" + targetType ] = old;
				}

				jQuery.event.triggered = false;
			}
		}
	},

	handle: function( event ) {
		var all, handlers, namespaces, namespace_sort = [], namespace_re, events, args = jQuery.makeArray( arguments );

		event = args[0] = jQuery.event.fix( event || window.event );
		event.currentTarget = this;

		// Namespaced event handlers
		all = event.type.indexOf(".") < 0 && !event.exclusive;

		if ( !all ) {
			namespaces = event.type.split(".");
			event.type = namespaces.shift();
			namespace_sort = namespaces.slice(0).sort();
			namespace_re = new RegExp("(^|\\.)" + namespace_sort.join("\\.(?:.*\\.)?") + "(\\.|$)");
		}

		event.namespace = event.namespace || namespace_sort.join(".");

		events = jQuery.data(this, this.nodeType ? "events" : "__events__");

		if ( typeof events === "function" ) {
			events = events.events;
		}

		handlers = (events || {})[ event.type ];

		if ( events && handlers ) {
			// Clone the handlers to prevent manipulation
			handlers = handlers.slice(0);

			for ( var j = 0, l = handlers.length; j < l; j++ ) {
				var handleObj = handlers[ j ];

				// Filter the functions by class
				if ( all || namespace_re.test( handleObj.namespace ) ) {
					// Pass in a reference to the handler function itself
					// So that we can later remove it
					event.handler = handleObj.handler;
					event.data = handleObj.data;
					event.handleObj = handleObj;
	
					var ret = handleObj.handler.apply( this, args );

					if ( ret !== undefined ) {
						event.result = ret;
						if ( ret === false ) {
							event.preventDefault();
							event.stopPropagation();
						}
					}

					if ( event.isImmediatePropagationStopped() ) {
						break;
					}
				}
			}
		}

		return event.result;
	},

	props: "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode layerX layerY metaKey newValue offsetX offsetY pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target toElement view wheelDelta which".split(" "),

	fix: function( event ) {
		if ( event[ jQuery.expando ] ) {
			return event;
		}

		// store a copy of the original event object
		// and "clone" to set read-only properties
		var originalEvent = event;
		event = jQuery.Event( originalEvent );

		for ( var i = this.props.length, prop; i; ) {
			prop = this.props[ --i ];
			event[ prop ] = originalEvent[ prop ];
		}

		// Fix target property, if necessary
		if ( !event.target ) {
			event.target = event.srcElement || document; // Fixes #1925 where srcElement might not be defined either
		}

		// check if target is a textnode (safari)
		if ( event.target.nodeType === 3 ) {
			event.target = event.target.parentNode;
		}

		// Add relatedTarget, if necessary
		if ( !event.relatedTarget && event.fromElement ) {
			event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;
		}

		// Calculate pageX/Y if missing and clientX/Y available
		if ( event.pageX == null && event.clientX != null ) {
			var doc = document.documentElement, body = document.body;
			event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);
			event.pageY = event.clientY + (doc && doc.scrollTop  || body && body.scrollTop  || 0) - (doc && doc.clientTop  || body && body.clientTop  || 0);
		}

		// Add which for key events
		if ( event.which == null && (event.charCode != null || event.keyCode != null) ) {
			event.which = event.charCode != null ? event.charCode : event.keyCode;
		}

		// Add metaKey to non-Mac browsers (use ctrl for PC's and Meta for Macs)
		if ( !event.metaKey && event.ctrlKey ) {
			event.metaKey = event.ctrlKey;
		}

		// Add which for click: 1 === left; 2 === middle; 3 === right
		// Note: button is not normalized, so don't use it
		if ( !event.which && event.button !== undefined ) {
			event.which = (event.button & 1 ? 1 : ( event.button & 2 ? 3 : ( event.button & 4 ? 2 : 0 ) ));
		}

		return event;
	},

	// Deprecated, use jQuery.guid instead
	guid: 1E8,

	// Deprecated, use jQuery.proxy instead
	proxy: jQuery.proxy,

	special: {
		ready: {
			// Make sure the ready event is setup
			setup: jQuery.bindReady,
			teardown: jQuery.noop
		},

		live: {
			add: function( handleObj ) {
				jQuery.event.add( this,
					liveConvert( handleObj.origType, handleObj.selector ),
					jQuery.extend({}, handleObj, {handler: liveHandler, guid: handleObj.handler.guid}) ); 
			},

			remove: function( handleObj ) {
				jQuery.event.remove( this, liveConvert( handleObj.origType, handleObj.selector ), handleObj );
			}
		},

		beforeunload: {
			setup: function( data, namespaces, eventHandle ) {
				// We only want to do this special case on windows
				if ( jQuery.isWindow( this ) ) {
					this.onbeforeunload = eventHandle;
				}
			},

			teardown: function( namespaces, eventHandle ) {
				if ( this.onbeforeunload === eventHandle ) {
					this.onbeforeunload = null;
				}
			}
		}
	}
};

jQuery.removeEvent = document.removeEventListener ?
	function( elem, type, handle ) {
		if ( elem.removeEventListener ) {
			elem.removeEventListener( type, handle, false );
		}
	} : 
	function( elem, type, handle ) {
		if ( elem.detachEvent ) {
			elem.detachEvent( "on" + type, handle );
		}
	};

jQuery.Event = function( src ) {
	// Allow instantiation without the 'new' keyword
	if ( !this.preventDefault ) {
		return new jQuery.Event( src );
	}

	// Event object
	if ( src && src.type ) {
		this.originalEvent = src;
		this.type = src.type;
	// Event type
	} else {
		this.type = src;
	}

	// timeStamp is buggy for some events on Firefox(#3843)
	// So we won't rely on the native value
	this.timeStamp = jQuery.now();

	// Mark it as fixed
	this[ jQuery.expando ] = true;
};

function returnFalse() {
	return false;
}
function returnTrue() {
	return true;
}

// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
jQuery.Event.prototype = {
	preventDefault: function() {
		this.isDefaultPrevented = returnTrue;

		var e = this.originalEvent;
		if ( !e ) {
			return;
		}
		
		// if preventDefault exists run it on the original event
		if ( e.preventDefault ) {
			e.preventDefault();

		// otherwise set the returnValue property of the original event to false (IE)
		} else {
			e.returnValue = false;
		}
	},
	stopPropagation: function() {
		this.isPropagationStopped = returnTrue;

		var e = this.originalEvent;
		if ( !e ) {
			return;
		}
		// if stopPropagation exists run it on the original event
		if ( e.stopPropagation ) {
			e.stopPropagation();
		}
		// otherwise set the cancelBubble property of the original event to true (IE)
		e.cancelBubble = true;
	},
	stopImmediatePropagation: function() {
		this.isImmediatePropagationStopped = returnTrue;
		this.stopPropagation();
	},
	isDefaultPrevented: returnFalse,
	isPropagationStopped: returnFalse,
	isImmediatePropagationStopped: returnFalse
};

// Checks if an event happened on an element within another element
// Used in jQuery.event.special.mouseenter and mouseleave handlers
var withinElement = function( event ) {
	// Check if mouse(over|out) are still within the same parent element
	var parent = event.relatedTarget;

	// Firefox sometimes assigns relatedTarget a XUL element
	// which we cannot access the parentNode property of
	try {
		// Traverse up the tree
		while ( parent && parent !== this ) {
			parent = parent.parentNode;
		}

		if ( parent !== this ) {
			// set the correct event type
			event.type = event.data;

			// handle event if we actually just moused on to a non sub-element
			jQuery.event.handle.apply( this, arguments );
		}

	// assuming we've left the element since we most likely mousedover a xul element
	} catch(e) { }
},

// In case of event delegation, we only need to rename the event.type,
// liveHandler will take care of the rest.
delegate = function( event ) {
	event.type = event.data;
	jQuery.event.handle.apply( this, arguments );
};

// Create mouseenter and mouseleave events
jQuery.each({
	mouseenter: "mouseover",
	mouseleave: "mouseout"
}, function( orig, fix ) {
	jQuery.event.special[ orig ] = {
		setup: function( data ) {
			jQuery.event.add( this, fix, data && data.selector ? delegate : withinElement, orig );
		},
		teardown: function( data ) {
			jQuery.event.remove( this, fix, data && data.selector ? delegate : withinElement );
		}
	};
});

// submit delegation
if ( !jQuery.support.submitBubbles ) {

	jQuery.event.special.submit = {
		setup: function( data, namespaces ) {
			if ( this.nodeName.toLowerCase() !== "form" ) {
				jQuery.event.add(this, "click.specialSubmit", function( e ) {
					var elem = e.target, type = elem.type;

					if ( (type === "submit" || type === "image") && jQuery( elem ).closest("form").length ) {
						e.liveFired = undefined;
						return trigger( "submit", this, arguments );
					}
				});
	 
				jQuery.event.add(this, "keypress.specialSubmit", function( e ) {
					var elem = e.target, type = elem.type;

					if ( (type === "text" || type === "password") && jQuery( elem ).closest("form").length && e.keyCode === 13 ) {
						e.liveFired = undefined;
						return trigger( "submit", this, arguments );
					}
				});

			} else {
				return false;
			}
		},

		teardown: function( namespaces ) {
			jQuery.event.remove( this, ".specialSubmit" );
		}
	};

}

// change delegation, happens here so we have bind.
if ( !jQuery.support.changeBubbles ) {

	var changeFilters,

	getVal = function( elem ) {
		var type = elem.type, val = elem.value;

		if ( type === "radio" || type === "checkbox" ) {
			val = elem.checked;

		} else if ( type === "select-multiple" ) {
			val = elem.selectedIndex > -1 ?
				jQuery.map( elem.options, function( elem ) {
					return elem.selected;
				}).join("-") :
				"";

		} else if ( elem.nodeName.toLowerCase() === "select" ) {
			val = elem.selectedIndex;
		}

		return val;
	},

	testChange = function testChange( e ) {
		var elem = e.target, data, val;

		if ( !rformElems.test( elem.nodeName ) || elem.readOnly ) {
			return;
		}

		data = jQuery.data( elem, "_change_data" );
		val = getVal(elem);

		// the current data will be also retrieved by beforeactivate
		if ( e.type !== "focusout" || elem.type !== "radio" ) {
			jQuery.data( elem, "_change_data", val );
		}
		
		if ( data === undefined || val === data ) {
			return;
		}

		if ( data != null || val ) {
			e.type = "change";
			e.liveFired = undefined;
			return jQuery.event.trigger( e, arguments[1], elem );
		}
	};

	jQuery.event.special.change = {
		filters: {
			focusout: testChange, 

			beforedeactivate: testChange,

			click: function( e ) {
				var elem = e.target, type = elem.type;

				if ( type === "radio" || type === "checkbox" || elem.nodeName.toLowerCase() === "select" ) {
					return testChange.call( this, e );
				}
			},

			// Change has to be called before submit
			// Keydown will be called before keypress, which is used in submit-event delegation
			keydown: function( e ) {
				var elem = e.target, type = elem.type;

				if ( (e.keyCode === 13 && elem.nodeName.toLowerCase() !== "textarea") ||
					(e.keyCode === 32 && (type === "checkbox" || type === "radio")) ||
					type === "select-multiple" ) {
					return testChange.call( this, e );
				}
			},

			// Beforeactivate happens also before the previous element is blurred
			// with this event you can't trigger a change event, but you can store
			// information
			beforeactivate: function( e ) {
				var elem = e.target;
				jQuery.data( elem, "_change_data", getVal(elem) );
			}
		},

		setup: function( data, namespaces ) {
			if ( this.type === "file" ) {
				return false;
			}

			for ( var type in changeFilters ) {
				jQuery.event.add( this, type + ".specialChange", changeFilters[type] );
			}

			return rformElems.test( this.nodeName );
		},

		teardown: function( namespaces ) {
			jQuery.event.remove( this, ".specialChange" );

			return rformElems.test( this.nodeName );
		}
	};

	changeFilters = jQuery.event.special.change.filters;

	// Handle when the input is .focus()'d
	changeFilters.focus = changeFilters.beforeactivate;
}

function trigger( type, elem, args ) {
	args[0].type = type;
	return jQuery.event.handle.apply( elem, args );
}

// Create "bubbling" focus and blur events
if ( document.addEventListener ) {
	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {
		jQuery.event.special[ fix ] = {
			setup: function() {
				if ( focusCounts[fix]++ === 0 ) {
					document.addEventListener( orig, handler, true );
				}
			}, 
			teardown: function() { 
				if ( --focusCounts[fix] === 0 ) {
					document.removeEventListener( orig, handler, true );
				}
			}
		};

		function handler( e ) { 
			e = jQuery.event.fix( e );
			e.type = fix;
			return jQuery.event.trigger( e, null, e.target );
		}
	});
}

jQuery.each(["bind", "one"], function( i, name ) {
	jQuery.fn[ name ] = function( type, data, fn ) {
		// Handle object literals
		if ( typeof type === "object" ) {
			for ( var key in type ) {
				this[ name ](key, data, type[key], fn);
			}
			return this;
		}
		
		if ( jQuery.isFunction( data ) || data === false ) {
			fn = data;
			data = undefined;
		}

		var handler = name === "one" ? jQuery.proxy( fn, function( event ) {
			jQuery( this ).unbind( event, handler );
			return fn.apply( this, arguments );
		}) : fn;

		if ( type === "unload" && name !== "one" ) {
			this.one( type, data, fn );

		} else {
			for ( var i = 0, l = this.length; i < l; i++ ) {
				jQuery.event.add( this[i], type, handler, data );
			}
		}

		return this;
	};
});

jQuery.fn.extend({
	unbind: function( type, fn ) {
		// Handle object literals
		if ( typeof type === "object" && !type.preventDefault ) {
			for ( var key in type ) {
				this.unbind(key, type[key]);
			}

		} else {
			for ( var i = 0, l = this.length; i < l; i++ ) {
				jQuery.event.remove( this[i], type, fn );
			}
		}

		return this;
	},
	
	delegate: function( selector, types, data, fn ) {
		return this.live( types, data, fn, selector );
	},
	
	undelegate: function( selector, types, fn ) {
		if ( arguments.length === 0 ) {
				return this.unbind( "live" );
		
		} else {
			return this.die( types, null, fn, selector );
		}
	},
	
	trigger: function( type, data ) {
		return this.each(function() {
			jQuery.event.trigger( type, data, this );
		});
	},

	triggerHandler: function( type, data ) {
		if ( this[0] ) {
			var event = jQuery.Event( type );
			event.preventDefault();
			event.stopPropagation();
			jQuery.event.trigger( event, data, this[0] );
			return event.result;
		}
	},

	toggle: function( fn ) {
		// Save reference to arguments for access in closure
		var args = arguments, i = 1;

		// link all the functions, so any of them can unbind this click handler
		while ( i < args.length ) {
			jQuery.proxy( fn, args[ i++ ] );
		}

		return this.click( jQuery.proxy( fn, function( event ) {
			// Figure out which function to execute
			var lastToggle = ( jQuery.data( this, "lastToggle" + fn.guid ) || 0 ) % i;
			jQuery.data( this, "lastToggle" + fn.guid, lastToggle + 1 );

			// Make sure that clicks stop
			event.preventDefault();

			// and execute the function
			return args[ lastToggle ].apply( this, arguments ) || false;
		}));
	},

	hover: function( fnOver, fnOut ) {
		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
	}
});

var liveMap = {
	focus: "focusin",
	blur: "focusout",
	mouseenter: "mouseover",
	mouseleave: "mouseout"
};

jQuery.each(["live", "die"], function( i, name ) {
	jQuery.fn[ name ] = function( types, data, fn, origSelector /* Internal Use Only */ ) {
		var type, i = 0, match, namespaces, preType,
			selector = origSelector || this.selector,
			context = origSelector ? this : jQuery( this.context );
		
		if ( typeof types === "object" && !types.preventDefault ) {
			for ( var key in types ) {
				context[ name ]( key, data, types[key], selector );
			}
			
			return this;
		}

		if ( jQuery.isFunction( data ) ) {
			fn = data;
			data = undefined;
		}

		types = (types || "").split(" ");

		while ( (type = types[ i++ ]) != null ) {
			match = rnamespaces.exec( type );
			namespaces = "";

			if ( match )  {
				namespaces = match[0];
				type = type.replace( rnamespaces, "" );
			}

			if ( type === "hover" ) {
				types.push( "mouseenter" + namespaces, "mouseleave" + namespaces );
				continue;
			}

			preType = type;

			if ( type === "focus" || type === "blur" ) {
				types.push( liveMap[ type ] + namespaces );
				type = type + namespaces;

			} else {
				type = (liveMap[ type ] || type) + namespaces;
			}

			if ( name === "live" ) {
				// bind live handler
				for ( var j = 0, l = context.length; j < l; j++ ) {
					jQuery.event.add( context[j], "live." + liveConvert( type, selector ),
						{ data: data, selector: selector, handler: fn, origType: type, origHandler: fn, preType: preType } );
				}

			} else {
				// unbind live handler
				context.unbind( "live." + liveConvert( type, selector ), fn );
			}
		}
		
		return this;
	};
});

function liveHandler( event ) {
	var stop, maxLevel, elems = [], selectors = [],
		related, match, handleObj, elem, j, i, l, data, close, namespace, ret,
		events = jQuery.data( this, this.nodeType ? "events" : "__events__" );

	if ( typeof events === "function" ) {
		events = events.events;
	}

	// Make sure we avoid non-left-click bubbling in Firefox (#3861)
	if ( event.liveFired === this || !events || !events.live || event.button && event.type === "click" ) {
		return;
	}

	if ( event.namespace ) {
		namespace = new RegExp("(^|\\.)" + event.namespace.split(".").join("\\.(?:.*\\.)?") + "(\\.|$)");
	}

	event.liveFired = this;

	var live = events.live.slice(0);

	for ( j = 0; j < live.length; j++ ) {
		handleObj = live[j];

		if ( handleObj.origType.replace( rnamespaces, "" ) === event.type ) {
			selectors.push( handleObj.selector );

		} else {
			live.splice( j--, 1 );
		}
	}

	match = jQuery( event.target ).closest( selectors, event.currentTarget );

	for ( i = 0, l = match.length; i < l; i++ ) {
		close = match[i];

		for ( j = 0; j < live.length; j++ ) {
			handleObj = live[j];

			if ( close.selector === handleObj.selector && (!namespace || namespace.test( handleObj.namespace )) ) {
				elem = close.elem;
				related = null;

				// Those two events require additional checking
				if ( handleObj.preType === "mouseenter" || handleObj.preType === "mouseleave" ) {
					event.type = handleObj.preType;
					related = jQuery( event.relatedTarget ).closest( handleObj.selector )[0];
				}

				if ( !related || related !== elem ) {
					elems.push({ elem: elem, handleObj: handleObj, level: close.level });
				}
			}
		}
	}

	for ( i = 0, l = elems.length; i < l; i++ ) {
		match = elems[i];

		if ( maxLevel && match.level > maxLevel ) {
			break;
		}

		event.currentTarget = match.elem;
		event.data = match.handleObj.data;
		event.handleObj = match.handleObj;

		ret = match.handleObj.origHandler.apply( match.elem, arguments );

		if ( ret === false || event.isPropagationStopped() ) {
			maxLevel = match.level;

			if ( ret === false ) {
				stop = false;
			}
			if ( event.isImmediatePropagationStopped() ) {
				break;
			}
		}
	}

	return stop;
}

function liveConvert( type, selector ) {
	return (type && type !== "*" ? type + "." : "") + selector.replace(rperiod, "`").replace(rspace, "&");
}

jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
	"change select submit keydown keypress keyup error").split(" "), function( i, name ) {

	// Handle event binding
	jQuery.fn[ name ] = function( data, fn ) {
		if ( fn == null ) {
			fn = data;
			data = null;
		}

		return arguments.length > 0 ?
			this.bind( name, data, fn ) :
			this.trigger( name );
	};

	if ( jQuery.attrFn ) {
		jQuery.attrFn[ name ] = true;
	}
});

// Prevent memory leaks in IE
// Window isn't included so as not to unbind existing unload events
// More info:
//  - http://isaacschlueter.com/2006/10/msie-memory-leaks/
if ( window.attachEvent && !window.addEventListener ) {
	jQuery(window).bind("unload", function() {
		for ( var id in jQuery.cache ) {
			if ( jQuery.cache[ id ].handle ) {
				// Try/Catch is to handle iframes being unloaded, see #4280
				try {
					jQuery.event.remove( jQuery.cache[ id ].handle.elem );
				} catch(e) {}
			}
		}
	});
}

})( jQuery );