/* Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * $LastChangedDate: 2007-10-06 20:11:15 +0200 (Sa, 06 Okt 2007) $
 * $Rev: 3581 $
 *
 * Version: @VERSION
 *
 * Requires: jQuery 1.2+
 */

(function($){
  
$.dimensions = {
  version: '@VERSION'
};

// Create innerHeight, innerWidth, outerHeight and outerWidth methods
$.each( [ 'Height', 'Width' ], function(i, name){
  
  // innerHeight and innerWidth
  $.fn[ 'inner' + name ] = function() {
    if (!this[0]) return;
    
    var torl = name == 'Height' ? 'Top'    : 'Left',  // top or left
        borr = name == 'Height' ? 'Bottom' : 'Right'; // bottom or right
    
    return num( this, name.toLowerCase() ) + num(this, 'padding' + torl) + num(this, 'padding' + borr);
  };
  
  // outerHeight and outerWidth
  $.fn[ 'outer' + name ] = function(options) {
    if (!this[0]) return;
    
    var torl = name == 'Height' ? 'Top'    : 'Left',  // top or left
        borr = name == 'Height' ? 'Bottom' : 'Right'; // bottom or right
    
    options = $.extend({ margin: false }, options || {});
    
    return num( this, name.toLowerCase() )
        + num(this, 'border' + torl + 'Width') + num(this, 'border' + borr + 'Width')
        + num(this, 'padding' + torl) + num(this, 'padding' + borr)
        + (options.margin ? (num(this, 'margin' + torl) + num(this, 'margin' + borr)) : 0);
  };
});

// Create scrollLeft and scrollTop methods
$.each( ['Left', 'Top'], function(i, name) {
  $.fn[ 'scroll' + name ] = function(val) {
    if (!this[0]) return;
    
    return val != undefined ?
    
      // Set the scroll offset
      this.each(function() {
        this == window || this == document ?
          window.scrollTo( 
            name == 'Left' ? val : $(window)[ 'scrollLeft' ](),
            name == 'Top'  ? val : $(window)[ 'scrollTop'  ]()
          ) :
          this[ 'scroll' + name ] = val;
      }) :
      
      // Return the scroll offset
      this[0] == window || this[0] == document ?
        self[ (name == 'Left' ? 'pageXOffset' : 'pageYOffset') ] ||
          $.boxModel && document.documentElement[ 'scroll' + name ] ||
          document.body[ 'scroll' + name ] :
        this[0][ 'scroll' + name ];
  };
});

$.fn.extend({
  position: function() {
    var left = 0, top = 0, elem = this[0], offset, parentOffset, offsetParent, results;
    
    if (elem) {
      // Get *real* offsetParent
      offsetParent = this.offsetParent();
      
      // Get correct offsets
      offset       = this.offset();
      parentOffset = offsetParent.offset();
      
      // Subtract element margins
      offset.top  -= num(elem, 'marginTop');
      offset.left -= num(elem, 'marginLeft');
      
      // Add offsetParent borders
      parentOffset.top  += num(offsetParent, 'borderTopWidth');
      parentOffset.left += num(offsetParent, 'borderLeftWidth');
      
      // Subtract the two offsets
      results = {
        top:  offset.top  - parentOffset.top,
        left: offset.left - parentOffset.left
      };
    }
    
    return results;
  },
  
  offsetParent: function() {
    var offsetParent = this[0].offsetParent;
    while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && $.css(offsetParent, 'position') == 'static') )
      offsetParent = offsetParent.offsetParent;
    return $(offsetParent);
  }
});

function num(el, prop) {
  return parseInt($.css(el.jquery?el[0]:el,prop))||0;
};

})(jQuery);