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