80 lines
3.8 KiB
JavaScript
80 lines
3.8 KiB
JavaScript
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// ####################################################################################
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// ####### #######
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// ####### Plugin: jScroll #######
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// ####### Author: William Duffy #######
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// ####### Website: http://www.wduffy.co.uk/jScroll #######
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// ####### Version: 1.1 #######
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// ####### #######
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// ####### Copyright (c) 2011, William Duffy - www.wduffy.co.uk #######
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// ####### #######
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// ####### Permission is hereby granted, free of charge, to any person #######
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// ####### obtaining a copy of this software and associated documentation #######
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// ####### files (the "Software"), to deal in the Software without #######
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// ####### restriction, including without limitation the rights to use, #######
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// ####### copy, modify, merge, publish, distribute, sublicense, and/or sell #######
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// ####### copies of the Software, and to permit persons to whom the #######
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// ####### Software is furnished to do so, subject to the following #######
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// ####### conditions: #######
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// ####### #######
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// ####### The above copyright notice and this permission notice shall be #######
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// ####### included in all copies or substantial portions of the Software. #######
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// ####### #######
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// ####### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, #######
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// ####### EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES #######
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// ####### OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND #######
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// ####### NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT #######
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// ####### HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, #######
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// ####### WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING #######
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// ####### FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR #######
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// ####### OTHER DEALINGS IN THE SOFTWARE. #######
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// ####### #######
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// ####################################################################################
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(function($) {
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// Public: jScroll Plugin
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$.fn.jScroll = function(options) {
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var opts = $.extend({}, $.fn.jScroll.defaults, options);
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return this.each(function() {
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var $element = $(this);
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var $window = $(window);
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var locator = new location($element);
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$window.scroll(function() {
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$element
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.stop()
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.animate(locator.getMargin($window), opts.speed);
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});
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});
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// Private
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function location($element)
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{
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this.min = $element.offset().top;
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this.originalMargin = parseInt($element.css("margin-top"), 10) || 0;
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this.getMargin = function ($window)
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{
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var max = $element.parent().height() - $element.outerHeight();
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var margin = this.originalMargin;
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if ($window.scrollTop() >= this.min)
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margin = margin + opts.top + $window.scrollTop() - this.min;
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if (margin > max)
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margin = max;
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return ({"marginTop" : margin + 'px'});
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}
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}
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};
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// Public: Default values
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$.fn.jScroll.defaults = {
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speed : "slow",
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top : 10
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};
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})(jQuery);
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