Issue 2401 - Integrate CSS property rule handling in Firefox

lib/cssProperties.js

Index: lib/cssProperties.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/cssProperties.js
@@ -0,0 +1,47 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus 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 Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @fileOverview This is merely forwarding messages from the content script to
+ * message responder, these will hopefully be received directly soon.
+ */
+
+"use strict";
+
+let {port} = require("messaging");
+let {onMessage} = require("ext_background");
+
+port.on("cssPropertiesRequest", ({payload, frames}) =>
+{
+  let result = undefined;
+
+  // HACK: Message responder doesn't care about sender.page but it passes
+  // sender.frame to whitelisting.checkWhitelisted(). Instead of converting
+  // our frame list into the format used in Chrome we keep it as is, then our
+  // whitelisting.checkWhitelisted() implementation won't need to convert it
+  // back. We merely have to set frames.url, message responder needs it.
+  frames.url = new URL(frames[0].location);
+  let sender = {
+    page: null,
+    frame: frames
+  };
+
+  onMessage._dispatch(payload, sender, data => {
+    result = data;
+  });
+  return result;
+});