hugo-theme-relearn/js/url.js

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// https://github.com/inexorabletash/polyfill/blob/v0.1.25/url.js
// URL Polyfill
// Draft specification: https://url.spec.whatwg.org
// Notes:
// - Primarily useful for parsing URLs and modifying query parameters
// - Should work in IE8+ and everything more modern
(function (global) {
'use strict';
// Browsers may have:
// * No global URL object
// * URL with static methods only - may have a dummy constructor
// * URL with members except searchParams
// * Full URL API support
var origURL = global.URL;
var nativeURL;
try{
if( origURL ){
nativeURL = new global.URL('http://example.com');
if( 'searchParams' in nativeURL )
return;
if( !('href' in nativeURL) )
nativeURL = undefined;
}
}
catch( _ ){}
// NOTE: Doesn't do the encoding/decoding dance
function urlencoded_serialize(pairs) {
var output = '', first = true;
pairs.forEach(function (pair) {
var name = encodeURIComponent(pair.name);
var value = encodeURIComponent(pair.value);
if( !first ) output += '&';
output += name + '=' + value;
first = false;
});
return output.replace(/%20/g, '+');
}
// NOTE: Doesn't do the encoding/decoding dance
function urlencoded_parse(input, isindex) {
var sequences = input.split('&');
if( isindex && sequences[0].indexOf('=') === -1 )
sequences[0] = '=' + sequences[0];
var pairs = [];
sequences.forEach(function (bytes) {
if( bytes.length === 0 ) return;
var index = bytes.indexOf('=');
if( index !== -1 ){
var name = bytes.substring(0, index);
var value = bytes.substring(index + 1);
}
else{
name = bytes;
value = '';
}
name = name.replace(/\+/g, ' ');
value = value.replace(/\+/g, ' ');
pairs.push({ name: name, value: value });
});
var output = [];
pairs.forEach(function (pair) {
output.push({
name: decodeURIComponent(pair.name),
value: decodeURIComponent(pair.value)
});
});
return output;
}
function URLUtils(url) {
if( nativeURL )
return new origURL(url);
var anchor = document.createElement('a');
anchor.href = url;
return anchor;
}
function URLSearchParams(init) {
var $this = this;
this._list = [];
if( init === undefined || init === null )
init = '';
if( Object(init) !== init || !(init instanceof URLSearchParams) )
init = String(init);
if( typeof init === 'string' && init.substring(0, 1) === '?' )
init = init.substring(1);
if( typeof init === 'string' )
this._list = urlencoded_parse(init);
else
this._list = init._list.slice();
this._url_object = null;
this._setList = function (list) { if( !updating ) $this._list = list; };
var updating = false;
this._update_steps = function() {
if( updating ) return;
updating = true;
if( !$this._url_object ) return;
// Partial workaround for IE issue with 'about:'
if( $this._url_object.protocol === 'about:' &&
$this._url_object.pathname.indexOf('?') !== -1 ){
$this._url_object.pathname = $this._url_object.pathname.split('?')[0];
}
$this._url_object.search = urlencoded_serialize($this._list);
updating = false;
};
}
Object.defineProperties(URLSearchParams.prototype, {
append: {
value: function (name, value) {
this._list.push({ name: name, value: value });
this._update_steps();
}, writable: true, enumerable: true, configurable: true
},
'delete': {
value: function (name) {
for( var i = 0; i < this._list.length; ){
if( this._list[i].name === name )
this._list.splice(i, 1);
else
++i;
}
this._update_steps();
}, writable: true, enumerable: true, configurable: true
},
get: {
value: function (name) {
for( var i = 0; i < this._list.length; ++i ){
if( this._list[i].name === name )
return this._list[i].value;
}
return null;
}, writable: true, enumerable: true, configurable: true
},
getAll: {
value: function (name) {
var result = [];
for( var i = 0; i < this._list.length; ++i ){
if( this._list[i].name === name )
result.push(this._list[i].value);
}
return result;
}, writable: true, enumerable: true, configurable: true
},
has: {
value: function (name) {
for( var i = 0; i < this._list.length; ++i ){
if( this._list[i].name === name )
return true;
}
return false;
}, writable: true, enumerable: true, configurable: true
},
set: {
value: function (name, value) {
var found = false;
for( var i = 0; i < this._list.length; ){
if( this._list[i].name === name ){
if( !found ){
this._list[i].value = value;
found = true;
++i;
}
else{
this._list.splice(i, 1);
}
}
else{
++i;
}
}
if( !found )
this._list.push({ name: name, value: value });
this._update_steps();
}, writable: true, enumerable: true, configurable: true
},
entries: {
value: function() {
var $this = this, index = 0;
return { next: function() {
if( index >= $this._list.length )
return {done: true, value: undefined};
var pair = $this._list[index++];
return {done: false, value: [pair.name, pair.value]};
}};
}, writable: true, enumerable: true, configurable: true
},
keys: {
value: function() {
var $this = this, index = 0;
return { next: function() {
if( index >= $this._list.length )
return {done: true, value: undefined};
var pair = $this._list[index++];
return {done: false, value: pair.name};
}};
}, writable: true, enumerable: true, configurable: true
},
values: {
value: function() {
var $this = this, index = 0;
return { next: function() {
if( index >= $this._list.length )
return {done: true, value: undefined};
var pair = $this._list[index++];
return {done: false, value: pair.value};
}};
}, writable: true, enumerable: true, configurable: true
},
forEach: {
value: function(callback) {
var thisArg = (arguments.length > 1) ? arguments[1] : undefined;
this._list.forEach(function(pair, _index) {
callback.call(thisArg, pair.name, pair.value);
});
}, writable: true, enumerable: true, configurable: true
},
toString: {
value: function () {
return urlencoded_serialize(this._list);
}, writable: true, enumerable: false, configurable: true
}
});
if( 'Symbol' in global && 'iterator' in global.Symbol ){
Object.defineProperty(URLSearchParams.prototype, global.Symbol.iterator, {
value: URLSearchParams.prototype.entries,
writable: true, enumerable: true, configurable: true});
}
function URL(url, base) {
if( !(this instanceof global.URL) )
throw new TypeError('Failed to construct "URL": Please use the "new" operator.');
if( base ){
url = (function () {
if( nativeURL ) return new origURL(url, base).href;
var doc;
// Use another document/base tag/anchor for relative URL resolution, if possible
if( document.implementation && document.implementation.createHTMLDocument ){
doc = document.implementation.createHTMLDocument('');
}
else if( document.implementation && document.implementation.createDocument ){
doc = document.implementation.createDocument('http://www.w3.org/1999/xhtml', 'html', null);
doc.documentElement.appendChild(doc.createElement('head'));
doc.documentElement.appendChild(doc.createElement('body'));
}
else if( window.ActiveXObject ){
doc = new window.ActiveXObject('htmlfile');
doc.write('<head></head><body></body>');
doc.close();
}
if( !doc ) throw Error('base not supported');
var baseTag = doc.createElement('base');
baseTag.href = base;
doc.getElementsByTagName('head')[0].appendChild(baseTag);
var anchor = doc.createElement('a');
anchor.href = url;
return anchor.href;
}());
}
// An inner object implementing URLUtils (either a native URL
// object or an HTMLAnchorElement instance) is used to perform the
// URL algorithms. With full ES5 getter/setter support, return a
// regular object For IE8's limited getter/setter support, a
// different HTMLAnchorElement is returned with properties
// overridden
var instance = URLUtils(url || '');
// Detect for ES5 getter/setter support
// (an Object.defineProperties polyfill that doesn't support getters/setters may throw)
var ES5_GET_SET = (function() {
if( !('defineProperties' in Object) ) return false;
try{
var obj = {};
Object.defineProperties(obj, { prop: { 'get': function () { return true; } } });
return obj.prop;
}
catch( _ ){
return false;
}
})();
var self = ES5_GET_SET ? this : document.createElement('a');
var query_object = new URLSearchParams(
instance.search ? instance.search.substring(1) : null);
query_object._url_object = self;
Object.defineProperties(self, {
href: {
get: function () { return instance.href; },
set: function (v) { instance.href = v; tidy_instance(); update_steps(); },
enumerable: true, configurable: true
},
origin: {
get: function () {
if( 'origin' in instance ) return instance.origin;
return this.protocol + '//' + this.host;
},
enumerable: true, configurable: true
},
protocol: {
get: function () { return instance.protocol; },
set: function (v) { instance.protocol = v; },
enumerable: true, configurable: true
},
username: {
get: function () { return instance.username; },
set: function (v) { instance.username = v; },
enumerable: true, configurable: true
},
password: {
get: function () { return instance.password; },
set: function (v) { instance.password = v; },
enumerable: true, configurable: true
},
host: {
get: function () {
// IE returns default port in |host|
var re = {'http:': /:80$/, 'https:': /:443$/, 'ftp:': /:21$/}[instance.protocol];
return re ? instance.host.replace(re, '') : instance.host;
},
set: function (v) { instance.host = v; },
enumerable: true, configurable: true
},
hostname: {
get: function () { return instance.hostname; },
set: function (v) { instance.hostname = v; },
enumerable: true, configurable: true
},
port: {
get: function () { return instance.port; },
set: function (v) { instance.port = v; },
enumerable: true, configurable: true
},
pathname: {
get: function () {
// IE does not include leading '/' in |pathname|
if( instance.pathname.charAt(0) !== '/' ) return '/' + instance.pathname;
return instance.pathname;
},
set: function (v) { instance.pathname = v; },
enumerable: true, configurable: true
},
search: {
get: function () { return instance.search; },
set: function (v) {
if( instance.search === v ) return;
instance.search = v; tidy_instance(); update_steps();
},
enumerable: true, configurable: true
},
searchParams: {
get: function () { return query_object; },
enumerable: true, configurable: true
},
hash: {
get: function () { return instance.hash; },
set: function (v) { instance.hash = v; tidy_instance(); },
enumerable: true, configurable: true
},
toString: {
value: function() { return instance.toString(); },
enumerable: false, configurable: true
},
valueOf: {
value: function() { return instance.valueOf(); },
enumerable: false, configurable: true
}
});
function tidy_instance() {
var href = instance.href.replace(/#$|\?$|\?(?=#)/g, '');
if( instance.href !== href )
instance.href = href;
}
function update_steps() {
query_object._setList(instance.search ? urlencoded_parse(instance.search.substring(1)) : []);
query_object._update_steps();
}
return self;
}
if( origURL ){
for( var i in origURL ){
if( Object.prototype.hasOwnProperty.call(origURL, i) && typeof origURL[i] === 'function' )
URL[i] = origURL[i];
}
}
global.URL = URL;
global.URLSearchParams = URLSearchParams;
}( typeof self !== 'undefined' ? self : this ));