define( [

"./core",
"./core/access",
"./var/document",
"./var/documentElement",
"./css/var/rnumnonpx",
"./css/curCSS",
"./css/addGetHookIf",
"./css/support",

"./core/init",
"./css",
"./selector" // contains

], function( jQuery, access, document, documentElement, rnumnonpx, curCSS, addGetHookIf, support ) {

/**

* Gets a window from an element
*/

function getWindow( elem ) {

return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;

}

jQuery.offset = {

setOffset: function( elem, options, i ) {
        var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
                position = jQuery.css( elem, "position" ),
                curElem = jQuery( elem ),
                props = {};

        // Set position first, in-case top/left are set even on static elem
        if ( position === "static" ) {
                elem.style.position = "relative";
        }

        curOffset = curElem.offset();
        curCSSTop = jQuery.css( elem, "top" );
        curCSSLeft = jQuery.css( elem, "left" );
        calculatePosition = ( position === "absolute" || position === "fixed" ) &&
                ( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;

        // Need to be able to calculate position if either
        // top or left is auto and position is either absolute or fixed
        if ( calculatePosition ) {
                curPosition = curElem.position();
                curTop = curPosition.top;
                curLeft = curPosition.left;

        } else {
                curTop = parseFloat( curCSSTop ) || 0;
                curLeft = parseFloat( curCSSLeft ) || 0;
        }

        if ( jQuery.isFunction( options ) ) {

                // Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
                options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
        }

        if ( options.top != null ) {
                props.top = ( options.top - curOffset.top ) + curTop;
        }
        if ( options.left != null ) {
                props.left = ( options.left - curOffset.left ) + curLeft;
        }

        if ( "using" in options ) {
                options.using.call( elem, props );

        } else {
                curElem.css( props );
        }
}

};

jQuery.fn.extend( {

offset: function( options ) {
        if ( arguments.length ) {
                return options === undefined ?
                        this :
                        this.each( function( i ) {
                                jQuery.offset.setOffset( this, options, i );
                        } );
        }

        var docElem, win,
                elem = this[ 0 ],
                box = { top: 0, left: 0 },
                doc = elem && elem.ownerDocument;

        if ( !doc ) {
                return;
        }

        docElem = doc.documentElement;

        // Make sure it's not a disconnected DOM node
        if ( !jQuery.contains( docElem, elem ) ) {
                return box;
        }

        box = elem.getBoundingClientRect();
        win = getWindow( doc );
        return {
                top: box.top + win.pageYOffset - docElem.clientTop,
                left: box.left + win.pageXOffset - docElem.clientLeft
        };
},

position: function() {
        if ( !this[ 0 ] ) {
                return;
        }

        var offsetParent, offset,
                elem = this[ 0 ],
                parentOffset = { top: 0, left: 0 };

        // Fixed elements are offset from window (parentOffset = {top:0, left: 0},
        // because it is its only offset parent
        if ( jQuery.css( elem, "position" ) === "fixed" ) {

                // Assume getBoundingClientRect is there when computed position is fixed
                offset = elem.getBoundingClientRect();

        } else {

                // Get *real* offsetParent
                offsetParent = this.offsetParent();

                // Get correct offsets
                offset = this.offset();
                if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
                        parentOffset = offsetParent.offset();
                }

                // Add offsetParent borders
                parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
                parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
        }

        // Subtract parent offsets and element margins
        return {
                top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
                left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
        };
},

// This method will return documentElement in the following cases:
// 1) For the element inside the iframe without offsetParent, this method will return
//    documentElement of the parent window
// 2) For the hidden or detached element
// 3) For body or html element, i.e. in case of the html node - it will return itself
//
// but those exceptions were never presented as a real life use-cases
// and might be considered as more preferable results.
//
// This logic, however, is not guaranteed and can change at any point in the future
offsetParent: function() {
        return this.map( function() {
                var offsetParent = this.offsetParent;

                while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
                        offsetParent = offsetParent.offsetParent;
                }

                return offsetParent || documentElement;
        } );
}

} );

// Create scrollLeft and scrollTop methods jQuery.each( { scrollLeft: “pageXOffset”, scrollTop: “pageYOffset” }, function( method, prop ) {

var top = "pageYOffset" === prop;

jQuery.fn[ method ] = function( val ) {
        return access( this, function( elem, method, val ) {
                var win = getWindow( elem );

                if ( val === undefined ) {
                        return win ? win[ prop ] : elem[ method ];
                }

                if ( win ) {
                        win.scrollTo(
                                !top ? val : win.pageXOffset,
                                top ? val : win.pageYOffset
                        );

                } else {
                        elem[ method ] = val;
                }
        }, method, val, arguments.length );
};

} );

// Support: Safari<7-8+, Chrome<37-44+ // Add the top/left cssHooks using jQuery.fn.position // Webkit bug: bugs.webkit.org/show_bug.cgi?id=29084 // Blink bug: code.google.com/p/chromium/issues/detail?id=229280 // getComputedStyle returns percent when specified for top/left/bottom/right; // rather than make the css module depend on the offset module, just check for it here jQuery.each( [ “top”, “left” ], function( i, prop ) {

jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
        function( elem, computed ) {
                if ( computed ) {
                        computed = curCSS( elem, prop );

                        // If curCSS returns percentage, fallback to offset
                        return rnumnonpx.test( computed ) ?
                                jQuery( elem ).position()[ prop ] + "px" :
                                computed;
                }
        }
);

} );

return jQuery; } );