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Luke Pulverenti 2017-01-27 18:07:14 -05:00
parent 82bcca376f
commit 8a6884abef
494 changed files with 256 additions and 120180 deletions
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186
dashboard-ui/bower_components/emby-webcomponents/lazyloader/lazyloader-scroll.js vendored
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@ -1,185 +1 @@
define(['visibleinviewport', 'browser', 'dom'], function (visibleinviewport, browser, dom) {
'use strict';
var thresholdX;
var thresholdY;
var requestIdleCallback = window.requestIdleCallback || function (fn) {
fn();
};
function resetThresholds() {
var x = screen.availWidth;
var y = screen.availHeight;
if (browser.touch) {
x *= 1.5;
y *= 1.5;
}
thresholdX = x;
thresholdY = y;
}
dom.addEventListener(window, "orientationchange", resetThresholds, { passive: true });
dom.addEventListener(window, 'resize', resetThresholds, { passive: true });
resetThresholds();
function isVisible(elem) {
return visibleinviewport(elem, true, thresholdX, thresholdY);
}
var wheelEvent = (document.implementation.hasFeature('Event.wheel', '3.0') ? 'wheel' : 'mousewheel');
var self = {};
function cancelAll(tokens) {
for (var i = 0, length = tokens.length; i < length; i++) {
tokens[i] = true;
}
}
function unveilElementsInternal(instance, callback) {
var unveiledElements = [];
var cancellationTokens = [];
var loadedCount = 0;
function unveilInternal(tokenIndex) {
var anyFound = false;
var out = false;
var elements = instance.elements;
// TODO: This out construct assumes left to right, top to bottom
for (var i = 0, length = elements.length; i < length; i++) {
if (cancellationTokens[tokenIndex]) {
return;
}
if (unveiledElements[i]) {
continue;
}
var elem = elements[i];
if (!out && isVisible(elem)) {
anyFound = true;
unveiledElements[i] = true;
callback(elem);
loadedCount++;
} else {
if (anyFound) {
out = true;
}
}
}
if (loadedCount >= elements.length) {
dom.removeEventListener(document, 'focus', unveil, {
capture: true,
passive: true
});
dom.removeEventListener(document, 'scroll', unveil, {
capture: true,
passive: true
});
dom.removeEventListener(document, wheelEvent, unveil, {
capture: true,
passive: true
});
dom.removeEventListener(window, 'resize', unveil, {
capture: true,
passive: true
});
}
}
function unveil() {
cancelAll(cancellationTokens);
var index = cancellationTokens.length;
cancellationTokens.length++;
setTimeout(function () {
unveilInternal(index);
}, 1);
}
dom.addEventListener(document, 'focus', unveil, {
capture: true,
passive: true
});
dom.addEventListener(document, 'scroll', unveil, {
capture: true,
passive: true
});
dom.addEventListener(document, wheelEvent, unveil, {
capture: true,
passive: true
});
dom.addEventListener(window, 'resize', unveil, {
capture: true,
passive: true
});
unveil();
}
function LazyLoader(options) {
this.options = options;
}
LazyLoader.prototype.createObserver = function () {
unveilElementsInternal(this, this.options.callback);
this.observer = 1;
};
LazyLoader.prototype.addElements = function (elements) {
this.elements = this.elements || [];
for (var i = 0, length = elements.length; i < length; i++) {
this.elements.push(elements[i]);
}
var observer = this.observer;
if (!observer) {
this.createObserver();
}
};
LazyLoader.prototype.destroyObserver = function (elements) {
};
LazyLoader.prototype.destroy = function (elements) {
this.destroyObserver();
this.options = null;
};
function unveilElements(elements, root, callback) {
if (!elements.length) {
return;
}
var lazyLoader = new LazyLoader({
callback: callback
});
lazyLoader.addElements(elements);
}
LazyLoader.lazyChildren = function (elem, callback) {
unveilElements(elem.getElementsByClassName('lazy'), elem, callback);
};
return LazyLoader;
});
define(["visibleinviewport","browser","dom"],function(visibleinviewport,browser,dom){"use strict";function resetThresholds(){var x=screen.availWidth,y=screen.availHeight;browser.touch&&(x*=1.5,y*=1.5),thresholdX=x,thresholdY=y}function isVisible(elem){return visibleinviewport(elem,!0,thresholdX,thresholdY)}function cancelAll(tokens){for(var i=0,length=tokens.length;i<length;i++)tokens[i]=!0}function unveilElementsInternal(instance,callback){function unveilInternal(tokenIndex){for(var anyFound=!1,out=!1,elements=instance.elements,i=0,length=elements.length;i<length;i++){if(cancellationTokens[tokenIndex])return;if(!unveiledElements[i]){var elem=elements[i];!out&&isVisible(elem)?(anyFound=!0,unveiledElements[i]=!0,callback(elem),loadedCount++):anyFound&&(out=!0)}}loadedCount>=elements.length&&(dom.removeEventListener(document,"focus",unveil,{capture:!0,passive:!0}),dom.removeEventListener(document,"scroll",unveil,{capture:!0,passive:!0}),dom.removeEventListener(document,wheelEvent,unveil,{capture:!0,passive:!0}),dom.removeEventListener(window,"resize",unveil,{capture:!0,passive:!0}))}function unveil(){cancelAll(cancellationTokens);var index=cancellationTokens.length;cancellationTokens.length++,setTimeout(function(){unveilInternal(index)},1)}var unveiledElements=[],cancellationTokens=[],loadedCount=0;dom.addEventListener(document,"focus",unveil,{capture:!0,passive:!0}),dom.addEventListener(document,"scroll",unveil,{capture:!0,passive:!0}),dom.addEventListener(document,wheelEvent,unveil,{capture:!0,passive:!0}),dom.addEventListener(window,"resize",unveil,{capture:!0,passive:!0}),unveil()}function LazyLoader(options){this.options=options}function unveilElements(elements,root,callback){if(elements.length){var lazyLoader=new LazyLoader({callback:callback});lazyLoader.addElements(elements)}}var thresholdX,thresholdY;window.requestIdleCallback||function(fn){fn()};dom.addEventListener(window,"orientationchange",resetThresholds,{passive:!0}),dom.addEventListener(window,"resize",resetThresholds,{passive:!0}),resetThresholds();var wheelEvent=document.implementation.hasFeature("Event.wheel","3.0")?"wheel":"mousewheel";return LazyLoader.prototype.createObserver=function(){unveilElementsInternal(this,this.options.callback),this.observer=1},LazyLoader.prototype.addElements=function(elements){this.elements=this.elements||[];for(var i=0,length=elements.length;i<length;i++)this.elements.push(elements[i]);var observer=this.observer;observer||this.createObserver()},LazyLoader.prototype.destroyObserver=function(elements){},LazyLoader.prototype.destroy=function(elements){this.destroyObserver(),this.options=null},LazyLoader.lazyChildren=function(elem,callback){unveilElements(elem.getElementsByClassName("lazy"),elem,callback)},LazyLoader});