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/*
* jQuery UI Position @VERSION
*
* Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Position
*/
(function( $, undefined ) {
$.ui = $.ui || {};
var horizontalPositions = /left|center|right/,
verticalPositions = /top|center|bottom/,
center = "center",
_position = $.fn.position,
_offset = $.fn.offset;
$.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 target = $( options.of ),
targetElem = target[0],
collision = ( options.collision || "flip" ).split( " " ),
offset = options.offset ? options.offset.split( " " ) : [ 0, 0 ],
targetWidth,
targetHeight,
basePosition;
if ( targetElem.nodeType === 9 ) {
targetWidth = target.width();
targetHeight = target.height();
basePosition = { top: 0, left: 0 };
} else if ( $.isWindow( targetElem ) ) {
targetWidth = target.width();
targetHeight = target.height();
basePosition = { top: target.scrollTop(), left: target.scrollLeft() };
} else if ( targetElem.preventDefault ) {
// force left top to allow flipping
options.at = "left top";
targetWidth = targetHeight = 0;
basePosition = { top: options.of.pageY, left: options.of.pageX };
} else {
targetWidth = target.outerWidth();
targetHeight = target.outerHeight();
basePosition = target.offset();
}
// force my and at to have valid horizontal and veritcal positions
// if a value is missing or invalid, it will be converted to center
$.each( [ "my", "at" ], function() {
var pos = ( options[this] || "" ).split( " " );
if ( pos.length === 1) {
pos = horizontalPositions.test( pos[0] ) ?
pos.concat( [center] ) :
verticalPositions.test( pos[0] ) ?
[ center ].concat( pos ) :
[ center, center ];
}
pos[ 0 ] = horizontalPositions.test( pos[0] ) ? pos[ 0 ] : center;
pos[ 1 ] = verticalPositions.test( pos[1] ) ? pos[ 1 ] : center;
options[ this ] = pos;
});
// normalize collision option
if ( collision.length === 1 ) {
collision[ 1 ] = collision[ 0 ];
}
// normalize offset option
offset[ 0 ] = parseInt( offset[0], 10 ) || 0;
if ( offset.length === 1 ) {
offset[ 1 ] = offset[ 0 ];
}
offset[ 1 ] = parseInt( offset[1], 10 ) || 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;
}
basePosition.left += offset[ 0 ];
basePosition.top += offset[ 1 ];
return this.each(function() {
var elem = $( this ),
elemWidth = elem.outerWidth(),
elemHeight = elem.outerHeight(),
marginLeft = parseInt( $.curCSS( this, "marginLeft", true ) ) || 0,
marginTop = parseInt( $.curCSS( this, "marginTop", true ) ) || 0,
collisionWidth = elemWidth + marginLeft +
( parseInt( $.curCSS( this, "marginRight", true ) ) || 0 ),
collisionHeight = elemHeight + marginTop +
( parseInt( $.curCSS( this, "marginBottom", true ) ) || 0 ),
position = $.extend( {}, basePosition ),
collisionPosition;
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;
}
// prevent fractions (see #5280)
position.left = Math.round( position.left );
position.top = Math.round( position.top );
collisionPosition = {
left: position.left - marginLeft,
top: position.top - 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: offset,
my: options.my,
at: options.at
});
}
});
if ( $.fn.bgiframe ) {
elem.bgiframe();
}
elem.offset( $.extend( position, { using: options.using } ) );
});
};
$.ui.position = {
fit: {
left: function( position, data ) {
var win = $( window ),
over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft();
position.left = over > 0 ? position.left - over : Math.max( position.left - data.collisionPosition.left, position.left );
},
top: function( position, data ) {
var win = $( window ),
over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop();
position.top = over > 0 ? position.top - over : Math.max( position.top - data.collisionPosition.top, position.top );
}
},
flip: {
left: function( position, data ) {
if ( data.at[0] === center ) {
return;
}
var win = $( window ),
over = data.collisionPosition.left + data.collisionWidth - win.width() - win.scrollLeft(),
myOffset = data.my[ 0 ] === "left" ?
-data.elemWidth :
data.my[ 0 ] === "right" ?
data.elemWidth :
0,
atOffset = data.at[ 0 ] === "left" ?
data.targetWidth :
-data.targetWidth,
offset = -2 * data.offset[ 0 ];
position.left += data.collisionPosition.left < 0 ?
myOffset + atOffset + offset :
over > 0 ?
myOffset + atOffset + offset :
0;
},
top: function( position, data ) {
if ( data.at[1] === center ) {
return;
}
var win = $( window ),
over = data.collisionPosition.top + data.collisionHeight - win.height() - win.scrollTop(),
myOffset = data.my[ 1 ] === "top" ?
-data.elemHeight :
data.my[ 1 ] === "bottom" ?
data.elemHeight :
0,
atOffset = data.at[ 1 ] === "top" ?
data.targetHeight :
-data.targetHeight,
offset = -2 * data.offset[ 1 ];
position.top += data.collisionPosition.top < 0 ?
myOffset + atOffset + offset :
over > 0 ?
myOffset + atOffset + offset :
0;
}
}
};
}( jQuery ));
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