mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-04 18:19:38 +02:00
147 lines
4.4 KiB
JavaScript
147 lines
4.4 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2015 Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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/******************************************************************************/
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(function() {
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'use strict';
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/******************************************************************************/
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// https://github.com/gorhill/uBlock/issues/1067
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// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
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// Firefox 17/Chromium 41 supports `startsWith`.
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if ( String.prototype.startsWith instanceof Function === false ) {
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String.prototype.startsWith = function(needle, pos) {
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if ( typeof pos !== 'number' ) {
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pos = 0;
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}
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return this.lastIndexOf(needle, pos) === pos;
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};
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}
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// https://github.com/gorhill/uBlock/issues/1067
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
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// Firefox 17/Chromium 41 supports `endsWith`.
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if ( String.prototype.endsWith instanceof Function === false ) {
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String.prototype.endsWith = function(needle, pos) {
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if ( typeof pos !== 'number' ) {
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pos = this.length;
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}
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pos -= needle.length;
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return this.indexOf(needle, pos) === pos;
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};
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}
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/******************************************************************************/
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// https://github.com/gorhill/uBlock/issues/1070
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
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// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
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// is not an accurate API of the real Set() type.
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if ( typeof self.Set !== 'function' ) {
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self.Set = function() {
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this.clear();
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};
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self.Set.polyfill = true;
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self.Set.prototype.clear = function() {
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this._set = Object.create(null);
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this.size = 0;
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};
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self.Set.prototype.add = function(k) {
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if ( this._set[k] === undefined ) {
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this._set[k] = true;
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this.size += 1;
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}
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};
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self.Set.prototype.delete = function(k) {
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if ( this._set[k] !== undefined ) {
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delete this._set[k];
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this.size -= 1;
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}
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};
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self.Set.prototype.has = function(k) {
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return this._set[k] !== undefined;
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};
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}
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/******************************************************************************/
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// https://github.com/gorhill/uBlock/issues/1070
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set#Browser_compatibility
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// This polyfill is designed to fulfill *only* what uBlock Origin needs -- this
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// is not an accurate API of the real Map() type.
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if ( typeof self.Map !== 'function' ) {
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self.Map = function() {
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this.clear();
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};
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self.Map.polyfill = true;
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self.Map.prototype.clear = function() {
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this._map = Object.create(null);
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this.size = 0;
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};
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self.Map.prototype.delete = function(k) {
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if ( this._map[k] !== undefined ) {
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delete this._map[k];
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this.size -= 1;
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}
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};
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self.Map.prototype.get = function(k) {
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return this._map[k];
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};
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self.Map.prototype.has = function(k) {
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return this._map[k] !== undefined;
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};
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self.Map.prototype.set = function(k, v) {
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if ( v !== undefined ) {
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if ( this._map[k] === undefined ) {
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this.size += 1;
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}
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this._map[k] = v;
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} else {
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if ( this._map[k] !== undefined ) {
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this.size -= 1;
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}
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delete this._map[k];
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}
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};
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}
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/******************************************************************************/
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})();
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