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+/*
+ * jQuery UI Position 1.8.2
+ *
+ * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
+ * Dual licensed under the MIT (MIT-LICENSE.txt)
+ * and GPL (GPL-LICENSE.txt) licenses.
+ *
+ * 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 ));