uBlock/platform/firefox/polyfill.js

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/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2016 The uBlock Origin authors
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/uBlock
*/
// For background page or non-background pages
'use strict';
/******************************************************************************/
// Patching for Pale Moon which does not implement ES6 Set/Map.
// Test for non-ES6 Set/Map: check if property `iterator` is present.
// The code is strictly to satisfy uBO's core, not to be an accurate
// implementation of ES6.
if ( self.Set.prototype.iterator instanceof Function ) {
//console.log('Patching non-ES6 Set() to be more ES6-like.');
self.Set.prototype._values = self.Set.prototype.values;
self.Set.prototype.values = function() {
this._valueIter = this._values();
this.value = undefined;
this.done = false;
return this;
};
self.Set.prototype.next = function() {
try {
this.value = this._valueIter.next();
} catch (ex) {
this._valueIter = undefined;
this.value = undefined;
this.done = true;
}
return this;
};
}
if ( self.Map.prototype.iterator instanceof Function ) {
//console.log('Patching non-ES6 Map() to be more ES6-like.');
self.Map.prototype._entries = self.Map.prototype.entries;
self.Map.prototype.entries = function() {
this._entryIter = this._entries();
this.value = undefined;
this.done = false;
return this;
};
self.Map.prototype.next = function() {
try {
this.value = this._entryIter.next();
} catch (ex) {
this._entryIter = undefined;
this.value = undefined;
this.done = true;
}
return this;
};
}