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/*
* jQuery UI Position @VERSION
*
* Copyright 2010, AUTHORS.txt
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Position
*/
(function( $ ) {
$.ui = $.ui || {};
var horizontalPositions = /left|center|right/,
horizontalDefault = "center",
verticalPositions = /top|center|bottom/,
verticalDefault = "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 ),
collision = ( options.collision || "flip" ).split( " " ),
offset = options.offset ? options.offset.split( " " ) : [ 0, 0 ],
targetWidth,
targetHeight,
basePosition;
if ( options.of.nodeType === 9 ) {
targetWidth = target.width();
targetHeight = target.height();
basePosition = { top: 0, left: 0 };
} else if ( options.of.scrollTo && options.of.document ) {
targetWidth = target.width();
targetHeight = target.height();
basePosition = { top: target.scrollTop(), left: target.scrollLeft() };
} else if ( options.of.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( [verticalDefault] ) :
verticalPositions.test( pos[0] ) ?
[ horizontalDefault ].concat( pos ) :
[ horizontalDefault, verticalDefault ];
}
pos[ 0 ] = horizontalPositions.test( pos[0] ) ? pos[ 0 ] : horizontalDefault;
pos[ 1 ] = verticalPositions.test( pos[1] ) ? pos[ 1 ] : verticalDefault;
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] === horizontalDefault ) {
basePosition.left += targetWidth / 2;
}
if ( options.at[1] === "bottom" ) {
basePosition.top += targetHeight;
} else if ( options.at[1] === verticalDefault ) {
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(),
position = $.extend( {}, basePosition );
if ( options.my[0] === "right" ) {
position.left -= elemWidth;
} else if ( options.my[0] === horizontalDefault ) {
position.left -= elemWidth / 2;
}
if ( options.my[1] === "bottom" ) {
position.top -= elemHeight;
} else if ( options.my[1] === verticalDefault ) {
position.top -= elemHeight / 2;
}
// prevent fractions (see #5280)
position.left = parseInt( position.left );
position.top = parseInt( position.top );
$.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,
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 = position.left + data.elemWidth - win.width() - win.scrollLeft();
position.left = over > 0 ? position.left - over : Math.max( 0, position.left );
},
top: function( position, data ) {
var win = $( window ),
over = position.top + data.elemHeight - win.height() - win.scrollTop();
position.top = over > 0 ? position.top - over : Math.max( 0, position.top );
}
},
flip: {
left: function( position, data ) {
if ( data.at[0] === "center" ) {
return;
}
var win = $( window ),
over = position.left + data.elemWidth - win.width() - win.scrollLeft(),
myOffset = data.my[ 0 ] === "left" ?
-data.elemWidth :
data.my[ 0 ] === "right" ?
data.elemWidth :
0,
offset = -2 * data.offset[ 0 ];
position.left += position.left < 0 ?
myOffset + data.targetWidth + offset :
over > 0 ?
myOffset - data.targetWidth + offset :
0;
},
top: function( position, data ) {
if ( data.at[1] === "center" ) {
return;
}
var win = $( window ),
over = position.top + data.elemHeight - win.height() - win.scrollTop(),
myOffset = data.my[ 1 ] === "top" ?
-data.elemHeight :
data.my[ 1 ] === "bottom" ?
data.elemHeight :
0,
atOffset = data.at[ 1 ] === "top" ?
data.targetHeight :
-data.targetHeight,
offset = -2 * data.offset[ 1 ];
position.top += position.top < 0 ?
myOffset + data.targetHeight + offset :
over > 0 ?
myOffset + atOffset + offset :
0;
}
}
};
// offset setter from jQuery 1.4
if ( !$.offset.setOffset ) {
$.offset.setOffset = function( elem, options ) {
// set position first, in-case top/left are set even on static elem
if ( /static/.test( $.curCSS( elem, "position" ) ) ) {
elem.style.position = "relative";
}
var curElem = $( elem ),
curOffset = curElem.offset(),
curTop = parseInt( $.curCSS( elem, "top", true ), 10 ) || 0,
curLeft = parseInt( $.curCSS( elem, "left", true ), 10) || 0,
props = {
top: (options.top - curOffset.top) + curTop,
left: (options.left - curOffset.left) + curLeft
};
if ( 'using' in options ) {
options.using.call( elem, props );
} else {
curElem.css( props );
}
};
$.fn.offset = function( options ) {
var elem = this[ 0 ];
if ( !elem || !elem.ownerDocument ) { return null; }
if ( options ) {
return this.each(function() {
$.offset.setOffset( this, options );
});
}
return _offset.call( this );
};
}
}( jQuery ));
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