Team:NJU-China/Javascript:fm-revealator-jquery

/*

Revealator jQuery Plugin
Revealator is a jQuery-based plugin for adding effects to elements that enter the window. It's simple, and easy to use.
version 1.0, Jan 11th, 2016
by Ingi P. Jacobsen

The MIT License (MIT)

Copyright (c) 2016 Faroe Media

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

window.Revealator = { timer: null, busy: false };

$(function () { var refreshRevealator = function () { var $window = $(window); var i = 0; var window_top = 0; var window_bottom = $window.height(); $('*[class^="revealator"]').each(function () { i++; var element = this; var $element = $(element); var element_bounding = element.getBoundingClientRect();

var position_class = undefined; if (element_bounding.top > window_bottom && element_bounding.bottom > window_bottom) { position_class = 'revealator-below'; } else if (element_bounding.top < window_bottom && element_bounding.bottom > window_bottom) { position_class = 'revealator-partially-below' } else if (element_bounding.top < window_top && element_bounding.bottom > window_top) { position_class = 'revealator-partially-above' } else if (element_bounding.top < window_top && element_bounding.bottom < window_top) { position_class = 'revealator-above'; } else { position_class = 'revealator-within'; }

if (!$element.hasClass(position_class)) { $element.removeClass('revealator-below revealator-partially-below revealator-partially-above revealator-above revealator-within'); $element.addClass(position_class); } }); };

$(window).bind('scroll resize load ready', function () { if (!window.Revealator.busy) { window.Revealator.busy = true; setTimeout(function () { window.Revealator.busy = false; refreshRevealator(); }, 150); } }); });