|
|
|
(function($, window, document, undefined) {
|
|
|
|
var $window = $(window);
|
|
|
|
var webp = false;
|
|
|
|
|
|
|
|
function check_webp_feature(feature, callback) {
|
|
|
|
var kTestImages = {
|
|
|
|
lossy: "UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA",
|
|
|
|
lossless: "UklGRhoAAABXRUJQVlA4TA0AAAAvAAAAEAcQERGIiP4HAA==",
|
|
|
|
alpha: "UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA==",
|
|
|
|
animation: "UklGRlIAAABXRUJQVlA4WAoAAAASAAAAAAAAAAAAQU5JTQYAAAD/////AABBTk1GJgAAAAAAAAAAAAAAAAAAAGQAAABWUDhMDQAAAC8AAAAQBxAREYiI/gcA"
|
|
|
|
};
|
|
|
|
var img = new Image();
|
|
|
|
img.onload = function () {
|
|
|
|
var result = (img.width > 0) && (img.height > 0);
|
|
|
|
callback(feature, result);
|
|
|
|
};
|
|
|
|
img.onerror = function () {
|
|
|
|
callback(feature, false);
|
|
|
|
};
|
|
|
|
img.src = "data:image/webp;base64," + kTestImages[feature];
|
|
|
|
}
|
|
|
|
|
|
|
|
setTimeout(function(){
|
|
|
|
check_webp_feature('lossy', function(feature, result) {
|
|
|
|
webp = result;
|
|
|
|
});
|
|
|
|
}, 50);
|
|
|
|
|
|
|
|
function img_url_format(imgUrl, opts) {
|
|
|
|
if (!imgUrl) {
|
|
|
|
return imgUrl;
|
|
|
|
}
|
|
|
|
var splits = imgUrl.split('?');
|
|
|
|
var url = splits[0];
|
|
|
|
var query = splits[1] || '';
|
|
|
|
|
|
|
|
if (query.indexOf('imageView2') === 0) {
|
|
|
|
if (query.indexOf('/q/') < 0 && !!opts.q) {
|
|
|
|
query += '/q/' + opts.q;
|
|
|
|
}
|
|
|
|
if (query.indexOf('/format/') < 0 && !!opts.format) {
|
|
|
|
query += '/format/' + opts.format;
|
|
|
|
}
|
|
|
|
return imgUrl + '?' + query;
|
|
|
|
} else if (query.indexOf('imageMogr2') === 0) {
|
|
|
|
if (query.indexOf('/quality/') < 0 && !!opts.q) {
|
|
|
|
query += '/quality/' + opts.q;
|
|
|
|
}
|
|
|
|
if (query.indexOf('/format/') < 0 && !!opts.format) {
|
|
|
|
query += '/format/' + opts.format;
|
|
|
|
}
|
|
|
|
return imgUrl + '?' + query;
|
|
|
|
} else if (query === '') {
|
|
|
|
var imageUrl = 'imageView2/2/interlace/1/q/' + opts.q;
|
|
|
|
|
|
|
|
if (opts.format) {
|
|
|
|
imageUrl += '/format/' + opts.format;
|
|
|
|
}
|
|
|
|
return url + '?' +imageUrl;
|
|
|
|
} else {
|
|
|
|
return imgUrl;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
$.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 : true,
|
|
|
|
appear : null,
|
|
|
|
load : null,
|
|
|
|
yasPath: '/web/',
|
|
|
|
yasImgDomain: 'http://analytics.yhurl.com/yas.gif',
|
|
|
|
placeholder : "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC",
|
|
|
|
try_again_css: null
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
});
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
//add by jp, 发送图片方式跨域发送消息
|
|
|
|
function crossSend(param, callback) {
|
|
|
|
var image = new Image(1, 1);
|
|
|
|
image.src = settings.yasImgDomain + settings.yasPath + '?' + param;
|
|
|
|
image.onload = function() {
|
|
|
|
image.onload = null;
|
|
|
|
if (callback) {
|
|
|
|
callback();
|
|
|
|
}
|
|
|
|
};
|
|
|
|
};
|
|
|
|
|
|
|
|
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);
|
|
|
|
var original = $self.attr("data-" + settings.data_attribute);
|
|
|
|
|
|
|
|
original = img_url_format(original, {q: 75, format: (webp ? 'webp': '')});
|
|
|
|
setTimeout(function(){
|
|
|
|
var preImg = new Image();
|
|
|
|
preImg.src = original;
|
|
|
|
}, 100);
|
|
|
|
|
|
|
|
self.loaded = false;
|
|
|
|
|
|
|
|
/* If no src attribute given use data:uri. */
|
|
|
|
if ($self.attr("src") === undefined || $self.attr("src") === false || $self.attr("src") === '') {
|
|
|
|
if ($self.is("img")) {
|
|
|
|
$self.attr("src", settings.placeholder);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* When appear is triggered load original image. */
|
|
|
|
$self.one("appear", function() {
|
|
|
|
|
|
|
|
//add by jp
|
|
|
|
if($self.timerid) clearTimeout($self.timerid);
|
|
|
|
//console.log("img appear, this.loaded:" + this.loaded + ", id:" + $self.attr("id"));
|
|
|
|
|
|
|
|
if (!this.loaded) {
|
|
|
|
if (settings.appear) {
|
|
|
|
var elements_left = elements.length;
|
|
|
|
settings.appear.call(self, elements_left, settings);
|
|
|
|
}
|
|
|
|
$("<img />")
|
|
|
|
//add by jp
|
|
|
|
.bind("error abort", function(){
|
|
|
|
$self.attr("src",settings.placeholder);
|
|
|
|
loadfail({info:'error'});
|
|
|
|
})
|
|
|
|
.bind("load", function() {
|
|
|
|
|
|
|
|
//add by jp, 加载超时后，不再进行加载，通过传统方式设置src，边下载边渲染
|
|
|
|
if($self.loadtimeout){
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
//add by jp, 清理检测图片下载超时定时器
|
|
|
|
clearTimeout($self.timerid);
|
|
|
|
|
|
|
|
//add by jp, 上报图片加载成功事件
|
|
|
|
if( $self.attr("pfmrpt") ){
|
|
|
|
//crossImgSend('success');
|
|
|
|
}
|
|
|
|
|
|
|
|
$self.hide();
|
|
|
|
if ($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));
|
|
|
|
|
|
|
|
//add by jp , 临时保存图片url
|
|
|
|
$self.src = $self.attr("data-" + settings.data_attribute);
|
|
|
|
|
|
|
|
//add by jp , 上报图片开始加载事件
|
|
|
|
if( $self.attr("pfmrpt") && _yas && _yas.add){
|
|
|
|
//crossImgSend(,'start');
|
|
|
|
}
|
|
|
|
|
|
|
|
//add by jp, 图片加载失败或超时的处理
|
|
|
|
var loadtimeout = function(options){
|
|
|
|
|
|
|
|
//记录标识图片加载超时
|
|
|
|
$self.loadtimeout = true;
|
|
|
|
|
|
|
|
//上报图片加载超时事件
|
|
|
|
if( $self.attr("pfmrpt") && _yas && _yas.add){
|
|
|
|
options.info ; //error or timeout
|
|
|
|
//crossImgSend(settings.yasImgDomain,settings.yasPath,'fail');
|
|
|
|
}
|
|
|
|
|
|
|
|
//清除图片src取值，便于图片边下载边渲染
|
|
|
|
$self.attr("src","");
|
|
|
|
|
|
|
|
setTimeout(function(){
|
|
|
|
$self.attr("src",$self.src);
|
|
|
|
},50);
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
//add by jp, 图片加载失败或超时的处理
|
|
|
|
var loadfail = function(options){
|
|
|
|
|
|
|
|
//记录标识图片加载超时
|
|
|
|
$self.loadtimeout = true;
|
|
|
|
|
|
|
|
//上报图片加载失败事件
|
|
|
|
if( $self.attr("pfmrpt") && _yas && _yas.add){
|
|
|
|
options.info ; //error or timeout
|
|
|
|
//crossImgSend(settings.yasImgDomain,settings.yasPath,'fail');
|
|
|
|
}
|
|
|
|
|
|
|
|
var width = $self.width();
|
|
|
|
var height = $self.height();
|
|
|
|
|
|
|
|
var $tryagain = $("<div class="+settings.try_again_css+" style='background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC) ;text-align: center;position:relative;width:"+width+"px;height:"+height+"px; line-height:"+height+"px'>图片打开失败,点击重新加载</div>");
|
|
|
|
// $tryagain.css("background-image",settings.placeholder);
|
|
|
|
$self.replaceWith($tryagain);
|
|
|
|
$tryagain.bind("click", function(e){
|
|
|
|
e.preventDefault();
|
|
|
|
$tryagain.replaceWith($self);
|
|
|
|
//清除图片src取值，便于图片边下载边渲染
|
|
|
|
$self.attr("src","");
|
|
|
|
setTimeout(function(){
|
|
|
|
$self.attr("src",$self.src);
|
|
|
|
},50);
|
|
|
|
});
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
//图片下载超时检测
|
|
|
|
$self.timerid = setTimeout(loadtimeout,5000);
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
});
|
|
|
|
|
|
|
|
/* 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) && !$.abovethetop(element, settings);
|
|
|
|
};
|
|
|
|
|
|
|
|
})($, window, document); |
...
|
...
|
|
