Integrated URL Fixer into Adblock Plus

lib/typoFixer.js

Index: lib/typoFixer.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/typoFixer.js
@@ -0,0 +1,198 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+let {Prefs} = require("prefs");
+let {WindowObserver} = require("windowObserver");
+let {getSchemeCorrection, isKnownScheme, getDomainCorrection, getDomainReferral, onWhitelistEntryAdded} = require("typoRules");
+let {processTypedDomain, processDomainCorrection, processFalsePositive} = require("typoCollector");
+let appIntegration = require("typoAppIntegration");
+let netError = require("typoNetError");
+
+// Attach our handlers to all browser windows
+new WindowObserver(
+{
+  applyToWindow: function(window)
+  {
+    if (!appIntegration.isKnownWindow(window))
+      return;
+    
+    netError.applyToWindow(window);
+    appIntegration.applyToWindow(window, correctURL);
+  },
+
+  removeFromWindow: function(window)
+  {
+    if (!appIntegration.isKnownWindow(window))
+      return;
+    
+    netError.removeFromWindow(window);
+    appIntegration.removeFromWindow(window);
+  }
+});
+
+function parseURL(url)
+{
+  if (/^\s*((?:\w+:)?\/*(?:[^\/#]*@)?)([^\/:#]*)/.test(url))
+    return [RegExp.$1, RegExp.$2.toLowerCase(), RegExp.rightContext];
+  else
+    return [url, null, null];
+}
+
+function isIPAddress(domain)
+{
+  try
+  {
+    Services.eTLD.getBaseDomainFromHost(domain);
+    return false;
+  }
+  catch (e)
+  {
+    return (e.result == Cr.NS_ERROR_HOST_IS_IP_ADDRESS);
+  }
+}
+
+function correctURL(window, value)
+{
+  let hasCorrection = false;
+
+  value = value.trim();
+  if (value.length == 0)
+    return null;
+
+  // Replace backslashes
+  value = value.replace(/\\/g, "/");
+
+  // Does the URL scheme need correcting?
+  if (/^([^\/]+)(\/.*)/.test(value))
+  {
+    let scheme = RegExp.$1;
+    let suffix = RegExp.$2;
+    let correction = getSchemeCorrection(scheme)
+    if (correction != scheme)
+    {
+      value = correction + suffix;
+      hasCorrection = true;
+    }
+  }
+
+  // Ignore URL schemes that we don't know
+  if (/^([\w\-]+:)/.test(value) && !isKnownScheme(RegExp.$1))
+    return null;
+
+  // Ignore search keywords and such
+  if ("getShortcutOrURI" in window && window.getShortcutOrURI(value) != value)
+    return null;
+
+  // Spaces before the first slash or period is probably a quick search
+  if (/^[^\/\.\s]+\s/.test(value))
+    return null;
+
+  let [prefix, domain, suffix] = parseURL(value);
+  if (!domain)
+    return null;
+
+  let oldDomain = domain;
+  if (!isIPAddress(domain))
+  {
+    processTypedDomain(domain);
+
+    let newDomain = getDomainCorrection(domain);
+    if (newDomain != domain)
+    {
+      processDomainCorrection(domain, newDomain);
+      domain = newDomain;
+      hasCorrection = true;
+
+      let referral = getDomainReferral(domain.replace(/^www\./, ""));
+      if (referral)
+      {
+        // We need to add a query string parameter when sending users to this domain
+        let anchorIndex = suffix.indexOf("#");
+        let anchor = "";
+        if (anchorIndex >= 0)
+        {
+          anchor = suffix.substr(anchorIndex);
+          suffix = suffix.substr(0, anchorIndex);
+        }
+
+        let queryIndex = suffix.indexOf("?");
+        if (queryIndex >= 0)
+        {
+          if (!/&$/.test(suffix))
+            suffix += "&";
+          suffix += referral;
+        }
+        else
+        {
+          if (suffix.indexOf("/") < 0)
+            suffix += "/";
+          suffix += "?" + referral;
+        }
+
+        suffix += anchor;
+      }
+    }
+  }
+
+  if (!hasCorrection)
+    return null;
+  
+  if (!appIntegration.isTypoCorrectionEnabled(window, prefix, domain, suffix))
+    return null;
+
+  // Show infobar to inform and ask about correction
+  let [message, yes, no] = getInfobarTexts();
+  message = message.replace(/\?1\?/g, prefix+domain);
+  let buttons = [
+    {
+      label:      yes,
+      accessKey:  null,
+      callback:   function()
+      {
+        // Yes: Do nothing
+      }
+    },
+    {
+      label:      no,
+      accessKey:  null,
+      callback:   function()
+      {
+        // No: Add to list of corrections (ignore)
+        let entry = oldDomain.replace(/^www\./, "");
+        Prefs.whitelist[entry] = true;
+        onWhitelistEntryAdded(entry);
+        Prefs.whitelist = JSON.parse(JSON.stringify(Prefs.whitelist));
+
+        appIntegration.loadURI(window, value);
+        processFalsePositive(domain, oldDomain);
+      }
+    }
+  ];
+  // We need to have persistence being set to 1 due to redirect which happens afterwards
+  appIntegration.openInfobar(window, require("info").addonName + "-infobar-askafter", message, buttons, 1);
+
+  require("typoSurvey").incrementCorrectionsCounter();
+
+  return prefix + domain + suffix;
+}
+
+let stringBundle = null;
+
+function getInfobarTexts()
+{
+  // Randomize URI to work around bug 719376
+  if (!stringBundle)
+    stringBundle = Services.strings.createBundle("chrome://" + require("info").addonName + "/locale/typo.properties?" + Math.random());
+  let result = [
+    stringBundle.GetStringFromName("urlfixer.isItCorrect"),
+    stringBundle.GetStringFromName("urlfixer.yes"),
+    stringBundle.GetStringFromName("urlfixer.no")
+  ];
+
+  getInfobarTexts = function() result;
+  return getInfobarTexts();
+}