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10 lines
915 B
JavaScript
10 lines
915 B
JavaScript
/*!
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* jQuery Bullseye v1.0
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* http://pixeltango.com
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*
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* Copyright 2010, Mickel Andersson
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* Dual licensed under the MIT or GPL Version 2 licenses.
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*
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* Date: Fri Aug 31 19:09:11 2010 +0100
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*/
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jQuery.fn.bullseye = function (b, h) { b = jQuery.extend({ offsetTop: 0, offsetHeight: 0, extendDown: false }, b); return this.each(function () { var a = $(this), c = $(h == null ? window : h), g = function () { var d = a.outerWidth(), e = a.outerHeight() + b.offsetHeight; c.width(); var f = c.height(), i = c.scrollTop(), j = c.scrollLeft() + d; f = i + f; var k = a.offset().left; d = k + d; var l = a.offset().top + b.offsetTop; e = l + e; if (f < l || (b.extendDown ? false : i > e) || j < k || j > d) { if (a.data("is-focused")) { a.data("is-focused", false); a.trigger("leaveviewport") } } else if (!a.data("is-focused")) { a.data("is-focused", true); a.trigger("enterviewport") } }; c.scroll(g).resize(g); g() }) }; |