Add options and a browser-action popup.

go-back-with-backspace/pages/options.js

+// Copyright 2016 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Initialize the page.
+function init() {
+  LoadInternationalizedStrings();
+
+  var blacklist = document.getElementById('blacklist');
+  var checkbox = document.getElementById('disableInApplets');
+  var whitelist = document.getElementById('whitelist');
+
+  // Configure the textboxes, allowing 200 characters for JSON serialization
+  // and key length.
+  blacklist.maxlength = chrome.storage.sync.QUOTA_BYTES_PER_ITEM - 200;
+  whitelist.maxlength = chrome.storage.sync.QUOTA_BYTES_PER_ITEM - 200;
+
+  // Set event handlers.
+  document.getElementById('done_button').onclick = function() {
+    chrome.storage.sync.set({
+      // Split the lists into arrays at whitespace before saving.
+      blacklist:
+          document.getElementById('blacklist').value.split(/\s+/),
+      disableInApplets: document.getElementById('disableInApplets').checked,
+      whitelist:
+          document.getElementById('whitelist').value.split(/\s+/)
+    }, function() {
+      // One easy way to force an error for testing is to change "sync" to
+      // "managed" in the chrome.storage.sync.set() call above.
+      if (chrome.runtime.lastError) {
+        document.getElementById('error').textContent =
+            chrome.i18n.getMessage('errorSaving',
+                                   chrome.runtime.lastError.message);
+      } else {
+        window.close();
+      }
+    });
+  };
+
+  document.getElementById('cancel_button').onclick = function() {
+    window.close();
+  };
+
+  document.getElementById('report_page').onclick = function() {
+    reportPage();
+  };
+
+  // Load saved settings into the form fields.
+  chrome.storage.sync.get({
+    blacklist: [],
+    disableInApplets: true,
+    whitelist: []
+  }, function(items) {
+    blacklist.value = items.blacklist.join('\n');
+    checkbox.checked = items.disableInApplets;
+    whitelist.value = items.whitelist.join('\n');
+  });
+}
+
+window.addEventListener('load', init, false);