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nuTensor/platform/chromium/polyfill.js

235 lines
7.0 KiB
JavaScript

/*******************************************************************************
uMatrix - a browser extension to block requests.
Copyright (C) 2017 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uMatrix
This file has been originally imported from:
https://github.com/gorhill/uBlock/tree/master/platform/chromium
*/
// For background page or non-background pages
/* exported objectAssign */
'use strict';
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1067
// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
// Firefox 17/Chromium 41 supports `startsWith`.
if ( String.prototype.startsWith instanceof Function === false ) {
String.prototype.startsWith = function(needle, pos) {
if ( typeof pos !== 'number' ) {
pos = 0;
}
return this.lastIndexOf(needle, pos) === pos;
};
}
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1067
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
// Firefox 17/Chromium 41 supports `endsWith`.
if ( String.prototype.endsWith instanceof Function === false ) {
String.prototype.endsWith = function(needle, pos) {
if ( typeof pos !== 'number' ) {
pos = this.length;
}
pos -= needle.length;
return this.indexOf(needle, pos) === pos;
};
}
/******************************************************************************/
// As per MDN, Object.assign appeared first in Chromium 45.
// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Browser_compatibility
var objectAssign = Object.assign || function(target, source) {
var keys = Object.keys(source);
for ( var i = 0, n = keys.length, key; i < n; i++ ) {
key = keys[i];
target[key] = source[key];
}
return target;
};
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1070
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
// is not an accurate API of the real Set() type.
if ( self.Set instanceof Function === false ) {
self.Set = function(iter) {
this.clear();
if ( Array.isArray(iter) ) {
for ( var i = 0, n = iter.length; i < n; i++ ) {
this.add(iter[i]);
}
return;
}
};
self.Set.polyfill = true;
self.Set.prototype.clear = function() {
this._set = Object.create(null);
this.size = 0;
// Iterator stuff
this._values = undefined;
this._i = undefined;
this.value = undefined;
this.done = true;
};
self.Set.prototype.add = function(k) {
if ( this._set[k] === undefined ) {
this._set[k] = true;
this.size += 1;
}
return this;
};
self.Set.prototype.delete = function(k) {
if ( this._set[k] !== undefined ) {
delete this._set[k];
this.size -= 1;
return true;
}
return false;
};
self.Set.prototype.has = function(k) {
return this._set[k] !== undefined;
};
self.Set.prototype.next = function() {
if ( this._i < this.size ) {
this.value = this._values[this._i++];
} else {
this._values = undefined;
this.value = undefined;
this.done = true;
}
return this;
};
self.Set.prototype.values = function() {
this._values = Object.keys(this._set);
this._i = 0;
this.value = undefined;
this.done = false;
return this;
};
}
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1070
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
// is not an accurate API of the real Map() type.
if ( self.Map instanceof Function === false ) {
self.Map = function(iter) {
this.clear();
if ( Array.isArray(iter) ) {
for ( var i = 0, n = iter.length, entry; i < n; i++ ) {
entry = iter[i];
this.set(entry[0], entry[1]);
}
return;
}
};
self.Map.polyfill = true;
self.Map.prototype.clear = function() {
this._map = Object.create(null);
this.size = 0;
// Iterator stuff
this._keys = undefined;
this._i = undefined;
this.value = undefined;
this.done = true;
};
self.Map.prototype.delete = function(k) {
if ( this._map[k] !== undefined ) {
delete this._map[k];
this.size -= 1;
return true;
}
return false;
};
self.Map.prototype.entries = function() {
this._keys = Object.keys(this._map);
this._i = 0;
this.value = [ undefined, undefined ];
this.done = false;
return this;
};
self.Map.prototype.get = function(k) {
return this._map[k];
};
self.Map.prototype.has = function(k) {
return this._map[k] !== undefined;
};
self.Map.prototype.next = function() {
if ( this._i < this.size ) {
var key = this._keys[this._i++];
this.value[0] = key;
this.value[1] = this._map[key];
} else {
this._keys = undefined;
this.value = undefined;
this.done = true;
}
return this;
};
self.Map.prototype.set = function(k, v) {
if ( v !== undefined ) {
if ( this._map[k] === undefined ) {
this.size += 1;
}
this._map[k] = v;
} else {
if ( this._map[k] !== undefined ) {
this.size -= 1;
}
delete this._map[k];
}
return this;
};
}
/******************************************************************************/