nextcloud/core/js/compatibility.js

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/**
* implement Object.create for browsers without native support
*/
if (typeof Object.create !== 'function') {
Object.create = function (o) {
function F() {}
F.prototype = o;
return new F();
};
}
/**
* implement Object.keys for browsers without native support
*/
if (typeof Object.keys !== 'function') {
Object.keys = function(o) {
if (o !== Object(o)) {
throw new TypeError('Object.keys called on a non-object');
}
var k=[],p;
for (p in o) {
if (Object.prototype.hasOwnProperty.call(o,p)) {
k.push(p);
}
}
return k;
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};
}
/**
* implement Array.filter for browsers without native support
*/
if (!Array.prototype.filter) {
Array.prototype.filter = function(fun /*, thisp*/) {
var len = this.length >>> 0;
if (typeof fun !== "function"){
throw new TypeError();
}
var res = [];
var thisp = arguments[1];
for (var i = 0; i < len; i++) {
if (i in this) {
var val = this[i]; // in case fun mutates this
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if (fun.call(thisp, val, i, this)) {
res.push(val);
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}
}
}
return res;
};
}
/**
* implement Array.indexOf for browsers without native support
*/
if (!Array.prototype.indexOf){
Array.prototype.indexOf = function(elt /*, from*/)
{
var len = this.length;
var from = Number(arguments[1]) || 0;
from = (from < 0) ? Math.ceil(from) : Math.floor(from);
if (from < 0){
from += len;
}
for (; from < len; from++)
{
if (from in this && this[from] === elt){
return from;
}
}
return -1;
};
}
/**
* implement Array.map for browsers without native support
*/
if (!Array.prototype.map){
Array.prototype.map = function(fun /*, thisp */){
"use strict";
if (this === void 0 || this === null){
throw new TypeError();
}
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun !== "function"){
throw new TypeError();
}
var res = new Array(len);
var thisp = arguments[1];
for (var i = 0; i < len; i++){
if (i in t){
res[i] = fun.call(thisp, t[i], i, t);
}
}
return res;
};
}
//https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
if (typeof this !== "function") {
// closest thing possible to the ECMAScript 5 internal IsCallable function
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
}
var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply(this instanceof fNOP && oThis
? this
: oThis,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();
return fBound;
};
}
//https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/Trim
if(!String.prototype.trim) {
String.prototype.trim = function () {
return this.replace(/^\s+|\s+$/g,'');
};
}
// Older Firefoxes doesn't support outerHTML
// From http://stackoverflow.com/questions/1700870/how-do-i-do-outerhtml-in-firefox#answer-3819589
function outerHTML(node){
// In newer browsers use the internal property otherwise build a wrapper.
return node.outerHTML || (
function(n){
var div = document.createElement('div'), h;
div.appendChild( n.cloneNode(true) );
h = div.innerHTML;
div = null;
return h;
})(node);
}
// devicePixelRatio for IE10
window.devicePixelRatio = window.devicePixelRatio ||
window.screen.deviceXDPI / window.screen.logicalXDPI || 1;