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define([
        "./core",
        "./var/strundefined",
        "./core/access",
        "./css/var/rnumnonpx",
        "./css/curCSS",
        "./css/addGetHookIf",
        "./css/support",

        "./core/init",
        "./css",
        "./selector" // contains
], function( jQuery, strundefined, access, rnumnonpx, curCSS, addGetHookIf, support ) {

var docElem = window.document.documentElement;

/**
 * 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 ) ) {
                        options = options.call( elem, i, 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;
                }

                // Support: BlackBerry 5, iOS 3 (original iPhone)
                // If we don't have gBCR, just use 0,0 rather than error
                if ( typeof elem.getBoundingClientRect !== strundefined ) {
                        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 )
                };
        },

        offsetParent: function() {
                return this.map(function() {
                        var offsetParent = this.offsetParent || docElem;

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

                        return offsetParent || docElem;
                });
        }
});

// 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 : window.pageXOffset,
                                        top ? val : window.pageYOffset
                                );

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

// Support: Safari<7+, Chrome<37+
// Add the top/left cssHooks using jQuery.fn.position
// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
// Blink bug: https://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;
});