source: trunk/template-common/lib/plugins/jquery.dimensions.js @ 3282

/* 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: 2008-09-25T15:10:39.280308Z $
 * $Rev: 6427 $
 *
 * Version: 1.2
 *
 * Requires: jQuery 1.2+
 */

(function($){
        
$.dimensions = {
        version: '1.2'
};

// 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 this.is(':visible') ? this[0]['client' + name] : 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 || {});
                
                var val = this.is(':visible') ? 
                                this[0]['offset' + name] : 
                                num( this, name.toLowerCase() )
                                        + num(this, 'border' + torl + 'Width') + num(this, 'border' + borr + 'Width')
                                        + num(this, 'padding' + torl) + num(this, 'padding' + borr);
                
                return val + (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($.curCSS(el.jquery?el[0]:el,prop,true))||0;
};

})(jQuery);