382 lines
12 KiB
JavaScript
Executable File
382 lines
12 KiB
JavaScript
Executable File
/*! Widget: lazyload (BETA) - 4/1/2016 (v2.25.7) *//*
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* Requires tablesorter v2.8+ and jQuery 1.7+
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* by Rob Garrison
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*/
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/*jshint browser:true, jquery:true, unused:false */
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;( function( $, window ) {
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'use strict';
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var ts = $.tablesorter;
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ts.lazyload = {
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init : function( c, wo ) {
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if ( wo.lazyload_event === 'scrollstop' && !ts.addScrollStopDone ) {
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ts.addScrollStop();
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ts.addScrollStopDone = true;
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$.event.special.scrollstop.latency = wo.lazyload_latency || 250;
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}
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ts.lazyload.update( c, wo );
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var namespace = c.namespace + 'lazyload ',
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events = [
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wo.lazyload_update,
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'pagerUpdate',
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wo.columnSelector_updated || 'columnUpdate',
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''
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].join( namespace );
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c.$table
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.on( events, function() {
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ts.lazyload.update( c, c.widgetOptions );
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})
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.on( 'filterEnd' + namespace, function() {
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// give lazyload a nudge after filtering the table. Fixes #1169
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$(window).scroll();
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});
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},
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update : function( c, wo ) {
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// add '.' if not already included
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var sel = ( /(\.|#)/.test( wo.lazyload_imageClass ) ? '' : '.' ) + wo.lazyload_imageClass;
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c.$table.find( sel ).lazyload({
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threshold : wo.lazyload_threshold,
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failure_limit : wo.lazyload_failure_limit,
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event : wo.lazyload_event,
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effect : wo.lazyload_effect,
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container : wo.lazyload_container,
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data_attribute : wo.lazyload_data_attribute,
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skip_invisible : wo.lazyload_skip_invisible,
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appear : wo.lazyload_appear,
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load : wo.lazyload_load,
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placeholder : wo.lazyload_placeholder
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});
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// give lazyload a nudge after updating the table. Fixes #1169
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setTimeout(function() {
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$(window).scroll();
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}, 1);
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},
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remove : function( c, wo ) {
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c.$table.off( c.namespace + 'lazyload' );
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}
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};
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ts.addWidget({
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id: 'lazyload',
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options: {
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// widget options
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lazyload_imageClass : 'lazy',
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lazyload_update : 'lazyloadUpdate',
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// scrollStop option (https://github.com/ssorallen/jquery-scrollstop)
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lazyload_latency : 250,
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// lazyload options (see http://www.appelsiini.net/projects/lazyload)
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lazyload_threshold : 0,
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lazyload_failure_limit : 0,
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lazyload_event : 'scrollstop',
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lazyload_effect : 'show',
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lazyload_container : window,
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lazyload_data_attribute : 'original',
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lazyload_skip_invisible : true,
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lazyload_appear : null,
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lazyload_load : null,
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lazyload_placeholder : 'data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=='
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},
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init: function( table, thisWidget, c, wo ) {
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ts.lazyload.init( c, wo );
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},
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remove : function( table, c, wo ) {
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ts.lazyload.remove( c, wo );
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}
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});
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// jscs:disable
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ts.addScrollStop = function() {
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// jQuery Scrollstop Plugin v1.2.0
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// https://github.com/ssorallen/jquery-scrollstop
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/*
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(function (factory) {
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// UMD[2] wrapper for jQuery plugins to work in AMD or in CommonJS.
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//
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// [2] https://github.com/umdjs/umd
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], factory);
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} else if (typeof exports === 'object') {
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// Node/CommonJS
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module.exports = factory(require('jquery'));
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} else {
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// Browser globals
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factory(jQuery);
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}
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}(function ($) { */
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// $.event.dispatch was undocumented and was deprecated in jQuery 1.7[1]. It
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// was replaced by $.event.handle in jQuery 1.9.
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//
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// Use the first of the available functions to support jQuery <1.8.
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//
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// [1] https://github.com/jquery/jquery-migrate/blob/master/src/event.js#L25
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var dispatch = $.event.dispatch || $.event.handle;
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var special = $.event.special,
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uid1 = 'D' + (+new Date()),
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uid2 = 'D' + (+new Date() + 1);
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special.scrollstart = {
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setup: function(data) {
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var _data = $.extend({
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latency: special.scrollstop.latency
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}, data);
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var timer,
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handler = function(evt) {
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var _self = this,
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_args = arguments;
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if (timer) {
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clearTimeout(timer);
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} else {
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evt.type = 'scrollstart';
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dispatch.apply(_self, _args);
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}
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timer = setTimeout(function() {
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timer = null;
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}, _data.latency);
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};
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$(this).bind('scroll', handler).data(uid1, handler);
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},
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teardown: function() {
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$(this).unbind('scroll', $(this).data(uid1));
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}
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};
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special.scrollstop = {
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latency: 250,
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setup: function(data) {
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var _data = $.extend({
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latency: special.scrollstop.latency
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}, data);
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var timer,
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handler = function(evt) {
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var _self = this,
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_args = arguments;
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if (timer) {
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clearTimeout(timer);
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}
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timer = setTimeout(function() {
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timer = null;
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evt.type = 'scrollstop';
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dispatch.apply(_self, _args);
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}, _data.latency);
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};
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$(this).bind('scroll', handler).data(uid2, handler);
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},
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teardown: function() {
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$(this).unbind('scroll', $(this).data(uid2));
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}
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};
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/*
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}));
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*/
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};
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// jscs:enable
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})( jQuery, window );
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// jscs:disable
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/*!
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* Lazy Load - jQuery plugin for lazy loading images
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*
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* Copyright (c) 2007-2015 Mika Tuupola
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* Project home:
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* http://www.appelsiini.net/projects/lazyload
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*
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* Version: 1.9.7
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*
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*/
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(function($, window, document, undefined) {
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var $window = $(window);
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$.fn.lazyload = function(options) {
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var elements = this;
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var $container;
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var settings = {
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threshold : 0,
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failure_limit : 0,
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event : "scroll",
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effect : "show",
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container : window,
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data_attribute : "original",
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skip_invisible : false,
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appear : null,
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load : null,
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placeholder : "data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
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};
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function update() {
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var counter = 0;
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elements.each(function() {
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var $this = $(this);
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if (settings.skip_invisible && !$this.is(":visible")) {
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return;
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}
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if ($.abovethetop(this, settings) || $.leftofbegin(this, settings)) {
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/* Nothing. */
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} else if (!$.belowthefold(this, settings) && !$.rightoffold(this, settings)) {
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$this.trigger("appear");
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/* if we found an image we'll load, reset the counter */
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counter = 0;
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} else {
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if (++counter > settings.failure_limit) {
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return false;
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}
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}
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});
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}
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if (options) {
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/* Maintain BC for a couple of versions. */
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if (undefined !== options.failurelimit) {
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options.failure_limit = options.failurelimit;
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delete options.failurelimit;
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}
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if (undefined !== options.effectspeed) {
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options.effect_speed = options.effectspeed;
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delete options.effectspeed;
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}
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$.extend(settings, options);
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}
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/* Cache container as jQuery as object. */
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$container = (settings.container === undefined ||
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settings.container === window) ? $window : $(settings.container);
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/* Fire one scroll event per scroll. Not one scroll event per image. */
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if (0 === settings.event.indexOf("scroll")) {
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$container.bind(settings.event, function() {
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return update();
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});
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}
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this.each(function() {
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var self = this;
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var $self = $(self);
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self.loaded = false;
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/* If no src attribute given use data:uri. */
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if ($self.attr("src") === undefined || $self.attr("src") === false) {
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if ($self.is("img")) {
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$self.attr("src", settings.placeholder);
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}
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}
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/* When appear is triggered load original image. */
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$self.one("appear", function() {
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if (!this.loaded) {
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if (settings.appear) {
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var elements_left = elements.length;
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settings.appear.call(self, elements_left, settings);
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}
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$("<img />")
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.bind("load", function() {
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var original = $self.attr("data-" + settings.data_attribute);
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$self.hide();
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if ($self.is("img")) {
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$self.attr("src", original);
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} else {
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$self.css("background-image", "url('" + original + "')");
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}
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$self[settings.effect](settings.effect_speed);
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self.loaded = true;
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/* Remove image from array so it is not looped next time. */
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var temp = $.grep(elements, function(element) {
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return !element.loaded;
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});
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elements = $(temp);
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if (settings.load) {
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var elements_left = elements.length;
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settings.load.call(self, elements_left, settings);
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}
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})
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.attr("src", $self.attr("data-" + settings.data_attribute));
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}
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});
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/* When wanted event is triggered load original image */
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/* by triggering appear. */
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if (0 !== settings.event.indexOf("scroll")) {
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$self.bind(settings.event, function() {
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if (!self.loaded) {
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$self.trigger("appear");
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}
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});
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}
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});
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/* Check if something appears when window is resized. */
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$window.bind("resize", function() {
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update();
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});
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/* With IOS5 force loading images when navigating with back button. */
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/* Non optimal workaround. */
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if ((/(?:iphone|ipod|ipad).*os 5/gi).test(navigator.appVersion)) {
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$window.bind("pageshow", function(event) {
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if (event.originalEvent && event.originalEvent.persisted) {
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elements.each(function() {
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$(this).trigger("appear");
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});
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}
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});
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}
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/* Force initial check if images should appear. */
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$(document).ready(function() {
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update();
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});
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return this;
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};
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/* Convenience methods in jQuery namespace. */
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/* Use as $.belowthefold(element, {threshold : 100, container : window}) */
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$.belowthefold = function(element, settings) {
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var fold;
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if (settings.container === undefined || settings.container === window) {
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fold = (window.innerHeight ? window.innerHeight : $window.height()) + $window.scrollTop();
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} else {
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fold = $(settings.container).offset().top + $(settings.container).height();
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}
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return fold <= $(element).offset().top - settings.threshold;
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};
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$.rightoffold = function(element, settings) {
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var fold;
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if (settings.container === undefined || settings.container === window) {
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fold = $window.width() + $window.scrollLeft();
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} else {
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fold = $(settings.container).offset().left + $(settings.container).width();
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}
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return fold <= $(element).offset().left - settings.threshold;
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};
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$.abovethetop = function(element, settings) {
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var fold;
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if (settings.container === undefined || settings.container === window) {
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fold = $window.scrollTop();
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} else {
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fold = $(settings.container).offset().top;
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}
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return fold >= $(element).offset().top + settings.threshold + $(element).height();
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};
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$.leftofbegin = function(element, settings) {
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var fold;
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if (settings.container === undefined || settings.container === window) {
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fold = $window.scrollLeft();
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} else {
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fold = $(settings.container).offset().left;
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}
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return fold >= $(element).offset().left + settings.threshold + $(element).width();
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};
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$.inviewport = function(element, settings) {
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return !$.rightoffold(element, settings) && !$.leftofbegin(element, settings) &&
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!$.belowthefold(element, settings) && !$.abovethetop(element, settings);
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};
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/* Custom selectors for your convenience. */
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/* Use as $("img:below-the-fold").something() or */
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/* $("img").filter(":below-the-fold").something() which is faster */
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$.extend($.expr[":"], {
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"below-the-fold" : function(a) { return $.belowthefold(a, {threshold : 0}); },
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"above-the-top" : function(a) { return !$.belowthefold(a, {threshold : 0}); },
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"right-of-screen": function(a) { return $.rightoffold(a, {threshold : 0}); },
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"left-of-screen" : function(a) { return !$.rightoffold(a, {threshold : 0}); },
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"in-viewport" : function(a) { return $.inviewport(a, {threshold : 0}); },
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/* Maintain BC for couple of versions. */
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"above-the-fold" : function(a) { return !$.belowthefold(a, {threshold : 0}); },
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"right-of-fold" : function(a) { return $.rightoffold(a, {threshold : 0}); },
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"left-of-fold" : function(a) { return !$.rightoffold(a, {threshold : 0}); }
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});
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})(jQuery, window, document);
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