Issue 5587, 5748 - Use mobile options page on Firefox for Android

lib/options.js

Index: lib/options.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/options.js
@@ -0,0 +1,121 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-present 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/>.
+ */
+
+/** @module options */
+
+"use strict";
+
+const {port} = require("messaging");
+const info = require("info");
+
+function whenOnline(page)
+{
+  return new Promise(resolve =>
+  {
+    function onPing(message, sender)
+    {
+      if (sender.page && sender.page.id == page.id)
+      {
+        port.off("ping", onPing);
+        resolve();
+      }
+    }
+
+    port.on("ping", onPing);
+
+    page.sendMessage({type: "ping"}, pong =>
+    {
+      if (pong)
+      {
+        port.off("ping", onPing);
+        resolve();
+      }
+    });
+  });
+}
+
+/**
+ * Opens the options page.
+ *
+ * @param {function} callback
+ * @static
+ */
+exports.showOptions = callback =>
+{
+  if ("openOptionsPage" in chrome.runtime &&
+      // Some versions of Firefox for Android before version 57 do have a
+      // runtime.openOptionsPage but it doesn't do anything.
+      // https://bugzilla.mozilla.org/show_bug.cgi?id=1364945
+      (info.application != "fennec" ||
+       parseInt(info.applicationVersion, 10) >= 57))
+  {
+    chrome.runtime.openOptionsPage(() =>
+    {
+      if (!callback || chrome.runtime.lastError)
+        return;
+
+      ext.pages.query({active: true, lastFocusedWindow: true}, ([page]) =>
+      {
+        whenOnline(page).then(() => callback(page));
+      });
+    });
+  }
+  else
+  {
+    // Edge does not yet support runtime.openOptionsPage (tested version 38)
+    chrome.tabs.query({}, tabs =>
+    {
+      // We find a tab ourselves because Edge has a bug when quering tabs
+      // with extension URL protocol:
+      // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/8094141/
+      // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/8604703/
+      // Firefox won't let us query for moz-extension:// pages either, though
+      // starting with Firefox 56 an extension can query for its own URLs:
+      // https://bugzilla.mozilla.org/show_bug.cgi?id=1271354
+      let optionsUrl = "options.html";
+      let fullOptionsUrl = ext.getURL(optionsUrl);
+      let tab = tabs.find(element => element.url == fullOptionsUrl);
+      if (tab)
+      {
+        // Firefox for Android before version 57 does not support
+        // runtime.openOptionsPage, nor does it support the windows API.
+        // Since there is effectively only one window on the mobile browser,
+        // there's no need to bring it into focus.
+        if ("windows" in chrome)
+          chrome.windows.update(tab.windowId, {focused: true});
+
+        chrome.tabs.update(tab.id, {active: true});
+
+        if (callback)
+        {
+          let page = new ext.Page(tab);
+          whenOnline(page).then(() => callback(page));
+        }
+      }
+      else
+      {
+        // We don't use fullOptionsUrl here because of this Edge issue:
+        // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10276332
+        ext.pages.open(optionsUrl, page =>
+        {
+          if (callback)
+            whenOnline(page).then(() => callback(page));
+        });
+      }
+    });
+  }
+};