Crawler frontend

chrome/content/crawler.js

+/*
+ * This Source Code is subject to the terms of the Mozilla Public License
+ * version 2.0 (the "License"). You can obtain a copy of the License at
+ * http://mozilla.org/MPL/2.0/.
+ */
+
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+
+let crawling = false;
+
+function require(module)
+{
+  let result = {};
+  result.wrappedJSObject = result;
+  Services.obs.notifyObservers(result, "abpcrawler-require", module);
+  return result.exports;
+}
+
+let {Crawler} = require("crawler");
+
+function onUnload()
+{
+  const fields = ["backend-url", "parallel-tabs"];
+  fields.forEach(function(field)
+  {
+    let control = document.getElementById(field);
+    control.setAttribute("value", control.value);
+  });
+}
+
+function getBackendUrl()
+{
+  let backendUrlTextBox = document.getElementById("backend-url");
+  return backendUrlTextBox.value;
+}
+
+function getParallelTabs()
+{
+  let parallelTabsTextBox = document.getElementById("parallel-tabs");
+  return parseInt(parallelTabsTextBox.value);
+}
+
+function onAccept()
+{
+  let backendUrl = getBackendUrl();
+  let parallelTabs = getParallelTabs();
+  let dialog = document.documentElement;
+  let acceptButton = dialog.getButton("accept");
+  crawling = acceptButton.disabled = true;
+
+  let mainWindow = window.opener;
+  if (!mainWindow || mainWindow.closed)
+  {
+    alert( "Unable to find the main window, aborting.");
+    crawling = acceptButton.disabled = false;
+  }
+  else
+    Crawler.crawl(backendUrl, parallelTabs, mainWindow, function()
+    {
+      crawling = acceptButton.disabled = false;
+    });
+
+  return false;
+}
+
+function onCancel()
+{
+  let closingPossible = !crawling;
+  if (!closingPossible)
+    alert("Crawling still in progress.");
+  return closingPossible;
+}