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application/modules/admin_menu/assets/js/context_menu/jquery.ui.position.js

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/*!
 * jQuery UI Position v1.10.0
 * http://jqueryui.com
 *
 * Copyright 2013 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/position/
 */
(function( $, undefined ) {

$.ui = $.ui || {};

var cachedScrollbarWidth,
    max = Math.max,
    abs = Math.abs,
    round = Math.round,
    rhorizontal = /left|center|right/,
    rvertical = /top|center|bottom/,
    roffset = /[\+\-]\d+%?/,
    rposition = /^\w+/,
    rpercent = /%$/,
    _position = $.fn.position;

function getOffsets( offsets, width, height ) {
    return [
        parseInt( offsets[ 0 ], 10 ) * ( rpercent.test( offsets[ 0 ] ) ? width / 100 : 1 ),
        parseInt( offsets[ 1 ], 10 ) * ( rpercent.test( offsets[ 1 ] ) ? height / 100 : 1 )
    ];
}

function parseCss( element, property ) {
    return parseInt( $.css( element, property ), 10 ) || 0;
}

function getDimensions( elem ) {
    var raw = elem[0];
    if ( raw.nodeType === 9 ) {
        return {
            width: elem.width(),
            height: elem.height(),
            offset: { top: 0, left: 0 }
        };
    }
    if ( $.isWindow( raw ) ) {
        return {
            width: elem.width(),
            height: elem.height(),
            offset: { top: elem.scrollTop(), left: elem.scrollLeft() }
        };
    }
    if ( raw.preventDefault ) {
        return {
            width: 0,
            height: 0,
            offset: { top: raw.pageY, left: raw.pageX }
        };
    }
    return {
        width: elem.outerWidth(),
        height: elem.outerHeight(),
        offset: elem.offset()
    };
}

$.position = {
    scrollbarWidth: function() {
        if ( cachedScrollbarWidth !== undefined ) {
            return cachedScrollbarWidth;
        }
        var w1, w2,
            div = $( "<div style='display:block;width:50px;height:50px;overflow:hidden;'><div style='height:100px;width:auto;'></div></div>" ),
            innerDiv = div.children()[0];

        $( "body" ).append( div );
        w1 = innerDiv.offsetWidth;
        div.css( "overflow", "scroll" );

        w2 = innerDiv.offsetWidth;

        if ( w1 === w2 ) {
            w2 = div[0].clientWidth;
        }

        div.remove();

        return (cachedScrollbarWidth = w1 - w2);
    },
    getScrollInfo: function( within ) {
        var overflowX = within.isWindow ? "" : within.element.css( "overflow-x" ),
            overflowY = within.isWindow ? "" : within.element.css( "overflow-y" ),
            hasOverflowX = overflowX === "scroll" ||
                ( overflowX === "auto" && within.width < within.element[0].scrollWidth ),
            hasOverflowY = overflowY === "scroll" ||
                ( overflowY === "auto" && within.height < within.element[0].scrollHeight );
        return {
            width: hasOverflowX ? $.position.scrollbarWidth() : 0,
            height: hasOverflowY ? $.position.scrollbarWidth() : 0
        };
    },
    getWithinInfo: function( element ) {
        var withinElement = $( element || window ),
            isWindow = $.isWindow( withinElement[0] );
        return {
            element: withinElement,
            isWindow: isWindow,
            offset: withinElement.offset() || { left: 0, top: 0 },
            scrollLeft: withinElement.scrollLeft(),
            scrollTop: withinElement.scrollTop(),
            width: isWindow ? withinElement.width() : withinElement.outerWidth(),
            height: isWindow ? withinElement.height() : withinElement.outerHeight()
        };
    }
};

$.fn.position = function( options ) {
    if ( !options || !options.of ) {
        return _position.apply( this, arguments );
    }

    // make a copy, we don't want to modify arguments
    options = $.extend( {}, options );

    var atOffset, targetWidth, targetHeight, targetOffset, basePosition, dimensions,
        target = $( options.of ),
        within = $.position.getWithinInfo( options.within ),
        scrollInfo = $.position.getScrollInfo( within ),
        collision = ( options.collision || "flip" ).split( " " ),
        offsets = {};

    dimensions = getDimensions( target );
    if ( target[0].preventDefault ) {
        // force left top to allow flipping
        options.at = "left top";
    }
    targetWidth = dimensions.width;
    targetHeight = dimensions.height;
    targetOffset = dimensions.offset;
    // clone to reuse original targetOffset later
    basePosition = $.extend( {}, targetOffset );

    // force my and at to have valid horizontal and vertical positions
    // if a value is missing or invalid, it will be converted to center
    $.each( [ "my", "at" ], function() {
        var pos = ( options[ this ] || "" ).split( " " ),
            horizontalOffset,
            verticalOffset;

        if ( pos.length === 1) {
            pos = rhorizontal.test( pos[ 0 ] ) ?
                pos.concat( [ "center" ] ) :
                rvertical.test( pos[ 0 ] ) ?
                    [ "center" ].concat( pos ) :
                    [ "center", "center" ];
        }
        pos[ 0 ] = rhorizontal.test( pos[ 0 ] ) ? pos[ 0 ] : "center";
        pos[ 1 ] = rvertical.test( pos[ 1 ] ) ? pos[ 1 ] : "center";

        // calculate offsets
        horizontalOffset = roffset.exec( pos[ 0 ] );
        verticalOffset = roffset.exec( pos[ 1 ] );
        offsets[ this ] = [
            horizontalOffset ? horizontalOffset[ 0 ] : 0,
            verticalOffset ? verticalOffset[ 0 ] : 0
        ];

        // reduce to just the positions without the offsets
        options[ this ] = [
            rposition.exec( pos[ 0 ] )[ 0 ],
            rposition.exec( pos[ 1 ] )[ 0 ]
        ];
    });

    // normalize collision option
    if ( collision.length === 1 ) {
        collision[ 1 ] = collision[ 0 ];
    }

    if ( options.at[ 0 ] === "right" ) {
        basePosition.left += targetWidth;
    } else if ( options.at[ 0 ] === "center" ) {
        basePosition.left += targetWidth / 2;
    }

    if ( options.at[ 1 ] === "bottom" ) {
        basePosition.top += targetHeight;
    } else if ( options.at[ 1 ] === "center" ) {
        basePosition.top += targetHeight / 2;
    }

    atOffset = getOffsets( offsets.at, targetWidth, targetHeight );
    basePosition.left += atOffset[ 0 ];
    basePosition.top += atOffset[ 1 ];

    return this.each(function() {
        var collisionPosition, using,
            elem = $( this ),
            elemWidth = elem.outerWidth(),
            elemHeight = elem.outerHeight(),
            marginLeft = parseCss( this, "marginLeft" ),
            marginTop = parseCss( this, "marginTop" ),
            collisionWidth = elemWidth + marginLeft + parseCss( this, "marginRight" ) + scrollInfo.width,
            collisionHeight = elemHeight + marginTop + parseCss( this, "marginBottom" ) + scrollInfo.height,
            position = $.extend( {}, basePosition ),
            myOffset = getOffsets( offsets.my, elem.outerWidth(), elem.outerHeight() );

        if ( options.my[ 0 ] === "right" ) {
            position.left -= elemWidth;
        } else if ( options.my[ 0 ] === "center" ) {
            position.left -= elemWidth / 2;
        }

        if ( options.my[ 1 ] === "bottom" ) {
            position.top -= elemHeight;
        } else if ( options.my[ 1 ] === "center" ) {
            position.top -= elemHeight / 2;
        }

        position.left += myOffset[ 0 ];
        position.top += myOffset[ 1 ];

        // if the browser doesn't support fractions, then round for consistent results
        if ( !$.support.offsetFractions ) {
            position.left = round( position.left );
            position.top = round( position.top );
        }

        collisionPosition = {
            marginLeft: marginLeft,
            marginTop: marginTop
        };

        $.each( [ "left", "top" ], function( i, dir ) {
            if ( $.ui.position[ collision[ i ] ] ) {
                $.ui.position[ collision[ i ] ][ dir ]( position, {
                    targetWidth: targetWidth,
                    targetHeight: targetHeight,
                    elemWidth: elemWidth,
                    elemHeight: elemHeight,
                    collisionPosition: collisionPosition,
                    collisionWidth: collisionWidth,
                    collisionHeight: collisionHeight,
                    offset: [ atOffset[ 0 ] + myOffset[ 0 ], atOffset [ 1 ] + myOffset[ 1 ] ],
                    my: options.my,
                    at: options.at,
                    within: within,
                    elem : elem
                });
            }
        });

        if ( options.using ) {
            // adds feedback as second argument to using callback, if present
            using = function( props ) {
                var left = targetOffset.left - position.left,
                    right = left + targetWidth - elemWidth,
                    top = targetOffset.top - position.top,
                    bottom = top + targetHeight - elemHeight,
                    feedback = {
                        target: {
                            element: target,
                            left: targetOffset.left,
                            top: targetOffset.top,
                            width: targetWidth,
                            height: targetHeight
                        },
                        element: {
                            element: elem,
                            left: position.left,
                            top: position.top,
                            width: elemWidth,
                            height: elemHeight
                        },
                        horizontal: right < 0 ? "left" : left > 0 ? "right" : "center",
                        vertical: bottom < 0 ? "top" : top > 0 ? "bottom" : "middle"
                    };
                if ( targetWidth < elemWidth && abs( left + right ) < targetWidth ) {
                    feedback.horizontal = "center";
                }
                if ( targetHeight < elemHeight && abs( top + bottom ) < targetHeight ) {
                    feedback.vertical = "middle";
                }
                if ( max( abs( left ), abs( right ) ) > max( abs( top ), abs( bottom ) ) ) {
                    feedback.important = "horizontal";
                } else {
                    feedback.important = "vertical";
                }
                options.using.call( this, props, feedback );
            };
        }

        elem.offset( $.extend( position, { using: using } ) );
    });
};

$.ui.position = {
    fit: {
        left: function( position, data ) {
            var within = data.within,
                withinOffset = within.isWindow ? within.scrollLeft : within.offset.left,
                outerWidth = within.width,
                collisionPosLeft = position.left - data.collisionPosition.marginLeft,
                overLeft = withinOffset - collisionPosLeft,
                overRight = collisionPosLeft + data.collisionWidth - outerWidth - withinOffset,
                newOverRight;

            // element is wider than within
            if ( data.collisionWidth > outerWidth ) {
                // element is initially over the left side of within
                if ( overLeft > 0 && overRight <= 0 ) {
                    newOverRight = position.left + overLeft + data.collisionWidth - outerWidth - withinOffset;
                    position.left += overLeft - newOverRight;
                // element is initially over right side of within
                } else if ( overRight > 0 && overLeft <= 0 ) {
                    position.left = withinOffset;
                // element is initially over both left and right sides of within
                } else {
                    if ( overLeft > overRight ) {
                        position.left = withinOffset + outerWidth - data.collisionWidth;
                    } else {
                        position.left = withinOffset;
                    }
                }
            // too far left -> align with left edge
            } else if ( overLeft > 0 ) {
                position.left += overLeft;
            // too far right -> align with right edge
            } else if ( overRight > 0 ) {
                position.left -= overRight;
            // adjust based on position and margin
            } else {
                position.left = max( position.left - collisionPosLeft, position.left );
            }
        },
        top: function( position, data ) {
            var within = data.within,
                withinOffset = within.isWindow ? within.scrollTop : within.offset.top,
                outerHeight = data.within.height,
                collisionPosTop = position.top - data.collisionPosition.marginTop,
                overTop = withinOffset - collisionPosTop,
                overBottom = collisionPosTop + data.collisionHeight - outerHeight - withinOffset,
                newOverBottom;

            // element is taller than within
            if ( data.collisionHeight > outerHeight ) {
                // element is initially over the top of within
                if ( overTop > 0 && overBottom <= 0 ) {
                    newOverBottom = position.top + overTop + data.collisionHeight - outerHeight - withinOffset;
                    position.top += overTop - newOverBottom;
                // element is initially over bottom of within
                } else if ( overBottom > 0 && overTop <= 0 ) {
                    position.top = withinOffset;
                // element is initially over both top and bottom of within
                } else {
                    if ( overTop > overBottom ) {
                        position.top = withinOffset + outerHeight - data.collisionHeight;
                    } else {
                        position.top = withinOffset;
                    }
                }
            // too far up -> align with top
            } else if ( overTop > 0 ) {
                position.top += overTop;
            // too far down -> align with bottom edge
            } else if ( overBottom > 0 ) {
                position.top -= overBottom;
            // adjust based on position and margin
            } else {
                position.top = max( position.top - collisionPosTop, position.top );
            }
        }
    },
    flip: {
        left: function( position, data ) {
            var within = data.within,
                withinOffset = within.offset.left + within.scrollLeft,
                outerWidth = within.width,
                offsetLeft = within.isWindow ? within.scrollLeft : within.offset.left,
                collisionPosLeft = position.left - data.collisionPosition.marginLeft,
                overLeft = collisionPosLeft - offsetLeft,
                overRight = collisionPosLeft + data.collisionWidth - outerWidth - offsetLeft,
                myOffset = data.my[ 0 ] === "left" ?
                    -data.elemWidth :
                    data.my[ 0 ] === "right" ?
                        data.elemWidth :
                        0,
                atOffset = data.at[ 0 ] === "left" ?
                    data.targetWidth :
                    data.at[ 0 ] === "right" ?
                        -data.targetWidth :
                        0,
                offset = -2 * data.offset[ 0 ],
                newOverRight,
                newOverLeft;

            if ( overLeft < 0 ) {
                newOverRight = position.left + myOffset + atOffset + offset + data.collisionWidth - outerWidth - withinOffset;
                if ( newOverRight < 0 || newOverRight < abs( overLeft ) ) {
                    position.left += myOffset + atOffset + offset;
                }
            }
            else if ( overRight > 0 ) {
                newOverLeft = position.left - data.collisionPosition.marginLeft + myOffset + atOffset + offset - offsetLeft;
                if ( newOverLeft > 0 || abs( newOverLeft ) < overRight ) {
                    position.left += myOffset + atOffset + offset;
                }
            }
        },
        top: function( position, data ) {
            var within = data.within,
                withinOffset = within.offset.top + within.scrollTop,
                outerHeight = within.height,
                offsetTop = within.isWindow ? within.scrollTop : within.offset.top,
                collisionPosTop = position.top - data.collisionPosition.marginTop,
                overTop = collisionPosTop - offsetTop,
                overBottom = collisionPosTop + data.collisionHeight - outerHeight - offsetTop,
                top = data.my[ 1 ] === "top",
                myOffset = top ?
                    -data.elemHeight :
                    data.my[ 1 ] === "bottom" ?
                        data.elemHeight :
                        0,
                atOffset = data.at[ 1 ] === "top" ?
                    data.targetHeight :
                    data.at[ 1 ] === "bottom" ?
                        -data.targetHeight :
                        0,
                offset = -2 * data.offset[ 1 ],
                newOverTop,
                newOverBottom;
            if ( overTop < 0 ) {
                newOverBottom = position.top + myOffset + atOffset + offset + data.collisionHeight - outerHeight - withinOffset;
                if ( ( position.top + myOffset + atOffset + offset) > overTop && ( newOverBottom < 0 || newOverBottom < abs( overTop ) ) ) {
                    position.top += myOffset + atOffset + offset;
                }
            }
            else if ( overBottom > 0 ) {
                newOverTop = position.top -  data.collisionPosition.marginTop + myOffset + atOffset + offset - offsetTop;
                if ( ( position.top + myOffset + atOffset + offset) > overBottom && ( newOverTop > 0 || abs( newOverTop ) < overBottom ) ) {
                    position.top += myOffset + atOffset + offset;
                }
            }
        }
    },
    flipfit: {
        left: function() {
            $.ui.position.flip.left.apply( this, arguments );
            $.ui.position.fit.left.apply( this, arguments );
        },
        top: function() {
            $.ui.position.flip.top.apply( this, arguments );
            $.ui.position.fit.top.apply( this, arguments );
        }
    }
};

// fraction support test
(function () {
    var testElement, testElementParent, testElementStyle, offsetLeft, i,
        body = document.getElementsByTagName( "body" )[ 0 ],
        div = document.createElement( "div" );

    //Create a "fake body" for testing based on method used in jQuery.support
    testElement = document.createElement( body ? "div" : "body" );
    testElementStyle = {
        visibility: "hidden",
        width: 0,
        height: 0,
        border: 0,
        margin: 0,
        background: "none"
    };
    if ( body ) {
        $.extend( testElementStyle, {
            position: "absolute",
            left: "-1000px",
            top: "-1000px"
        });
    }
    for ( i in testElementStyle ) {
        testElement.style[ i ] = testElementStyle[ i ];
    }
    testElement.appendChild( div );
    testElementParent = body || document.documentElement;
    testElementParent.insertBefore( testElement, testElementParent.firstChild );

    div.style.cssText = "position: absolute; left: 10.7432222px;";

    offsetLeft = $( div ).offset().left;
    $.support.offsetFractions = offsetLeft > 10 && offsetLeft < 11;

    testElement.innerHTML = "";
    testElementParent.removeChild( testElement );
})();

}( jQuery ) );