Set background to none on our mock body and remove its contents to avoid a crash...

[jquery.git] / src / event.js

(function( jQuery ) {

var hasOwn = Object.prototype.hasOwnProperty,
        rnamespaces = /\.(.*)$/,
        rformElems = /^(?:textarea|input|select)$/i,
        rperiod = /\./g,
        rspaces = / /g,
        rescape = /[^\w\s.|`]/g,
        fcleanup = function( nm ) {
                return nm.replace(rescape, "\\$&");
        };

/*
 * 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;
                }

                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;
                }

                var events = elemData.events,
                        eventHandle = elemData.handle;

                if ( !events ) {
                        elemData.events = events = {};
                }

                if ( !eventHandle ) {
                        elemData.handle = eventHandle = function( e ) {
                                // Discard the second event of a jQuery.event.trigger() and
                                // when an event is called after a page has unloaded
                                return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ?
                                        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 event optimization
                        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,
                        elemData = jQuery.hasData( elem ) && jQuery._data( elem ),
                        events = elemData && elemData.events;

                if ( !elemData || !events ) {
                        return;
                }

                // 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 ( jQuery.isEmptyObject( elemData ) ) {
                                jQuery.removeData( elem, undefined, true );
                        }
                }
        },
        
        // Events that are safe to short-circuit if no handlers are attached.
        // Native DOM events should not be added, they may have inline handlers.
        customEvent: {
                "getData": true,
                "setData": true,
                "changeData": true
        },

        trigger: function( event, data, elem, onlyHandlers ) {
                // Event object or event type
                var type = event.type || event,
                        namespaces = [],
                        exclusive;

                if ( type.indexOf("!") >= 0 ) {
                        // Exclusive events trigger only for the exact event (no namespaces)
                        type = type.slice(0, -1);
                        exclusive = true;
                }

                if ( type.indexOf(".") >= 0 ) {
                        // Namespaced trigger; create a regexp to match event type in handle()
                        namespaces = type.split(".");
                        type = namespaces.shift();
                        namespaces.sort();
                }

                if ( (!elem || jQuery.event.customEvent[ type ]) && !jQuery.event.global[ type ] ) {
                        // No jQuery handlers for this event type, and it can't have inline handlers
                        return;
                }

                // Caller can pass in an Event, Object, or just an event type string
                event = typeof event === "object" ?
                        // jQuery.Event object
                        event[ jQuery.expando ] ? event :
                        // Object literal
                        new jQuery.Event( type, event ) :
                        // Just the event type (string)
                        new jQuery.Event( type );

                event.type = type;
                event.exclusive = exclusive;
                event.namespace = namespaces.join(".");
                event.namespace_re = new RegExp("(^|\\.)" + namespaces.join("\\.(?:.*\\.)?") + "(\\.|$)");
                
                // triggerHandler() and global events don't bubble or run the default action
                if ( onlyHandlers || !elem ) {
                        event.preventDefault();
                        event.stopPropagation();
                }

                // Handle a global trigger
                if ( !elem ) {
                        // TODO: Stop taunting the data cache; remove global events and always attach to document
                        jQuery.each( jQuery.cache, function() {
                                // internalKey variable is just used to make it easier to find
                                // and potentially change this stuff later; currently it just
                                // points to jQuery.expando
                                var internalKey = jQuery.expando,
                                        internalCache = this[ internalKey ];
                                if ( internalCache && internalCache.events && internalCache.events[ type ] ) {
                                        jQuery.event.trigger( event, data, internalCache.handle.elem );
                                }
                        });
                        return;
                }

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

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

                // Clone any incoming data and prepend the event, creating the handler arg list
                data = data ? jQuery.makeArray( data ) : [];
                data.unshift( event );

                var cur = elem,
                        // IE doesn't like method names with a colon (#3533, #8272)
                        ontype = type.indexOf(":") < 0 ? "on" + type : "";

                // Fire event on the current element, then bubble up the DOM tree
                do {
                        var handle = jQuery._data( cur, "handle" );

                        event.currentTarget = cur;
                        if ( handle ) {
                                handle.apply( cur, data );
                        }

                        // Trigger an inline bound script
                        if ( ontype && jQuery.acceptData( cur ) && cur[ ontype ] && cur[ ontype ].apply( cur, data ) === false ) {
                                event.result = false;
                                event.preventDefault();
                        }

                        // Bubble up to document, then to window
                        cur = cur.parentNode || cur.ownerDocument || cur === event.target.ownerDocument && window;
                } while ( cur && !event.isPropagationStopped() );

                // If nobody prevented the default action, do it now
                if ( !event.isDefaultPrevented() ) {
                        var old,
                                special = jQuery.event.special[ type ] || {};

                        if ( (!special._default || special._default.call( elem.ownerDocument, event ) === false) &&
                                !(type === "click" && jQuery.nodeName( elem, "a" )) && jQuery.acceptData( elem ) ) {

                                // Call a native DOM method on the target with the same name name as the event.
                                // Can't use an .isFunction)() check here because IE6/7 fails that test.
                                // IE<9 dies on focus to hidden element (#1486), may want to revisit a try/catch.
                                try {
                                        if ( ontype && elem[ type ] ) {
                                                // Don't re-trigger an onFOO event when we call its FOO() method
                                                old = elem[ ontype ];

                                                if ( old ) {
                                                        elem[ ontype ] = null;
                                                }

                                                jQuery.event.triggered = type;
                                                elem[ type ]();
                                        }
                                } catch ( ieError ) {}

                                if ( old ) {
                                        elem[ ontype ] = old;
                                }

                                jQuery.event.triggered = undefined;
                        }
                }
                
                return event.result;
        },

        handle: function( event ) {
                event = jQuery.event.fix( event || window.event );
                // Snapshot the handlers list since a called handler may add/remove events.
                var handlers = ((jQuery._data( this, "events" ) || {})[ event.type ] || []).slice(0),
                        run_all = !event.exclusive && !event.namespace,
                        args = Array.prototype.slice.call( arguments, 0 );

                // Use the fix-ed Event rather than the (read-only) native event
                args[0] = event;
                event.currentTarget = this;

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

                        // Triggered event must 1) be non-exclusive and have no namespace, or
                        // 2) have namespace(s) a subset or equal to those in the bound event.
                        if ( run_all || event.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 ) {
                        // Fixes #1925 where srcElement might not be defined either
                        event.target = event.srcElement || document;
                }

                // 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 eventDocument = event.target.ownerDocument || document,
                                doc = eventDocument.documentElement,
                                body = eventDocument.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, props ) {
        // Allow instantiation without the 'new' keyword
        if ( !this.preventDefault ) {
                return new jQuery.Event( src, props );
        }

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

                // Events bubbling up the document may have been marked as prevented
                // by a handler lower down the tree; reflect the correct value.
                this.isDefaultPrevented = (src.defaultPrevented || src.returnValue === false ||
                        src.getPreventDefault && src.getPreventDefault()) ? returnTrue : returnFalse;

        // Event type
        } else {
                this.type = src;
        }

        // Put explicitly provided properties onto the event object
        if ( props ) {
                jQuery.extend( this, props );
        }

        // 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 {

                // Chrome does something similar, the parentNode property
                // can be accessed but is null.
                if ( parent && parent !== document && !parent.parentNode ) {
                        return;
                }
                // 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 ( !jQuery.nodeName( this, "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 ) {
                                                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 ) {
                                                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 ( jQuery.nodeName( elem, "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;
                        jQuery.event.trigger( e, arguments[1], elem );
                }
        };

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

                        beforedeactivate: testChange,

                        click: function( e ) {
                                var elem = e.target, type = jQuery.nodeName( elem, "input" ) ? elem.type : "";

                                if ( type === "radio" || type === "checkbox" || jQuery.nodeName( elem, "select" ) ) {
                                        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 = jQuery.nodeName( elem, "input" ) ? elem.type : "";

                                if ( (e.keyCode === 13 && !jQuery.nodeName( elem, "textarea" ) ) ||
                                        (e.keyCode === 32 && (type === "checkbox" || type === "radio")) ||
                                        type === "select-multiple" ) {
                                        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 ) {
        // Piggyback on a donor event to simulate a different one.
        // Fake originalEvent to avoid donor's stopPropagation, but if the
        // simulated event prevents default then we do the same on the donor.
        // Don't pass args or remember liveFired; they apply to the donor event.
        var event = jQuery.extend( {}, args[ 0 ] );
        event.type = type;
        event.originalEvent = {};
        event.liveFired = undefined;
        jQuery.event.handle.call( elem, event );
        if ( event.isDefaultPrevented() ) {
                args[ 0 ].preventDefault();
        }
}

// Create "bubbling" focus and blur events
if ( !jQuery.support.focusinBubbles ) {
        jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

                // Attach a single capturing handler while someone wants focusin/focusout
                var attaches = 0;

                jQuery.event.special[ fix ] = {
                        setup: function() {
                                if ( attaches++ === 0 ) {
                                        document.addEventListener( orig, handler, true );
                                }
                        },
                        teardown: function() {
                                if ( --attaches === 0 ) {
                                        document.removeEventListener( orig, handler, true );
                                }
                        }
                };

                function handler( donor ) {
                        // Donor event is always a native one; fix it and switch its type.
                        // Let focusin/out handler cancel the donor focus/blur event.
                        var e = jQuery.event.fix( donor );
                        e.type = fix;
                        e.originalEvent = {};
                        jQuery.event.trigger( e, null, e.target );
                        if ( e.isDefaultPrevented() ) {
                                donor.preventDefault();
                        }
                }
        });
}

jQuery.each(["bind", "one"], function( i, name ) {
        jQuery.fn[ name ] = function( type, data, fn ) {
                var handler;

                // Handle object literals
                if ( typeof type === "object" ) {
                        for ( var key in type ) {
                                this[ name ](key, data, type[key], fn);
                        }
                        return this;
                }

                if ( arguments.length === 2 || data === false ) {
                        fn = data;
                        data = undefined;
                }

                if ( name === "one" ) {
                        handler = function( event ) {
                                jQuery( this ).unbind( event, handler );
                                return fn.apply( this, arguments );
                        };
                        handler.guid = fn.guid || jQuery.guid++;
                } else {
                        handler = 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] ) {
                        return jQuery.event.trigger( type, data, this[0], true );
                }
        },

        toggle: function( fn ) {
                // Save reference to arguments for access in closure
                var args = arguments,
                        guid = fn.guid || jQuery.guid++,
                        i = 0,
                        toggler = 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;
                        };

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

                return this.click( toggler );
        },

        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 ( name === "die" && !types &&
                                        origSelector && origSelector.charAt(0) === "." ) {

                        context.unbind( origSelector );

                        return this;
                }

                if ( data === false || jQuery.isFunction( data ) ) {
                        fn = data || returnFalse;
                        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 ( liveMap[ type ] ) {
                                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, related, match, handleObj, elem, j, i, l, data, close, namespace, ret,
                elems = [],
                selectors = [],
                events = jQuery._data( this, "events" );

        // Make sure we avoid non-left-click bubbling in Firefox (#3861) and disabled elements in IE (#6911)
        if ( event.liveFired === this || !events || !events.live || event.target.disabled || 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 )) && !close.elem.disabled ) {
                                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];

                                        // Make sure not to accidentally match a child element with the same selector
                                        if ( related && jQuery.contains( elem, related ) ) {
                                                related = elem;
                                        }
                                }

                                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(rspaces, "&");
}

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;
        }
});

})( jQuery );