jquery.dimensions.js
上传用户:stephen_wu
上传日期:2008-07-05
资源大小:1757k
文件大小:3k
- /* 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: 2007-12-20 08:46:55 -0600 (Thu, 20 Dec 2007) $
- * $Rev: 4259 $
- *
- * 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);