1 files changed, 96 insertions, 0 deletions
diff --git a/js/polyfill.js b/js/polyfill.js
new file mode 100644
index 0000000..dea7e39
--- /dev/null
+++ b/js/polyfill.js
@@ -0,0 +1,96 @@
+/*******************************************************************************
+
+    ηMatrix - a browser extension to black/white list requests.
+    Copyright (C) 2017-2019 Raymond Hill
+    Copyright (C) 2019 Alessio Vanni
+
+    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/}.
+
+    uMatrix 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';
+
+/******************************************************************************/
+/******************************************************************************/
+
+// As per MDN, Object.assign appeared first in Firefox 34.
+// 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;
+};
+
+/******************************************************************************/
+
+// 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;
+    };
+}
+