Bug 1001957 - Don't use a CPOW for reload. r=felipe/mccr8/smaug

Original patch from billm.

browser/base/content/browser.js

@@ -2632,24 +2632,14 @@ function BrowserReloadWithFlags(reloadFlags) {
     return;
   }
 
-  /* First, we'll try to use the session history object to reload so
-   * that framesets are handled properly. If we're in a special
-   * window (such as view-source) that has no session history, fall
-   * back on using the web navigation's reload method.
-   */
+  let windowUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                          .getInterface(Ci.nsIDOMWindowUtils);
 
-  var webNav = gBrowser.webNavigation;
-  try {
-    var sh = webNav.sessionHistory;
-    if (sh)
-      webNav = sh.QueryInterface(nsIWebNavigation);
-  } catch (e) {
-  }
-
-  try {
-    webNav.reload(reloadFlags);
-  } catch (e) {
-  }
+  gBrowser.selectedBrowser
+          .messageManager
+          .sendAsyncMessage("Browser:Reload",
+                            { flags: reloadFlags,
+                              handlingUserInput: windowUtils.isHandlingUserInput });
 }
 
 var PrintPreviewListener = {

browser/base/content/content.js

@@ -34,6 +34,34 @@ addMessageListener("Browser:HideSessionRestoreButton", function (message) {
   }
 });
 
+addMessageListener("Browser:Reload", function(message) {
+  /* First, we'll try to use the session history object to reload so
+   * that framesets are handled properly. If we're in a special
+   * window (such as view-source) that has no session history, fall
+   * back on using the web navigation's reload method.
+   */
+
+  let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
+  try {
+    let sh = webNav.sessionHistory;
+    if (sh)
+      webNav = sh.QueryInterface(Ci.nsIWebNavigation);
+  } catch (e) {
+  }
+
+  let reloadFlags = message.data.flags;
+  let handlingUserInput;
+  try {
+    handlingUserInput = content.QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIDOMWindowUtils)
+                               .setHandlingUserInput(message.data.handlingUserInput);
+    webNav.reload(reloadFlags);
+  } catch (e) {
+  } finally {
+    handlingUserInput.destruct();
+  }
+});
+
 addEventListener("DOMFormHasPassword", function(event) {
   InsecurePasswordUtils.checkForInsecurePasswords(event.target);
   LoginManagerContent.onFormPassword(event);

browser/base/content/test/general/browser_bug822367.js

@@ -173,7 +173,13 @@ function MixedTest6B() {
 
 function MixedTest6C() {
   gTestBrowser.removeEventListener("load", MixedTest6C, true);
-  waitForCondition(function() content.document.getElementById('f1').contentDocument.getElementById('p1').innerHTML == "hello", MixedTest6D, "Waited too long for mixed script to run in Test 6");
+  waitForCondition(function() {
+    try {
+      return content.document.getElementById('f1').contentDocument.getElementById('p1').innerHTML == "hello";
+    } catch (e) {
+      return false;
+    }
+  }, MixedTest6D, "Waited too long for mixed script to run in Test 6");
 }
 function MixedTest6D() {
   ok(content.document.getElementById('f1').contentDocument.getElementById('p1').innerHTML == "hello","Mixed script didn't load in Test 6");

dom/base/nsDOMWindowUtils.cpp

@@ -1,4 +1,5 @@
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sts=2 sw=2 et tw=80: */
 /* 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/. */
@@ -3587,6 +3588,74 @@ nsDOMWindowUtils::GetOMTAStyle(nsIDOMElement* aElement,
   return NS_OK;
 }
 
+namespace {
+
+class HandlingUserInputHelper MOZ_FINAL : public nsIJSRAIIHelper
+{
+public:
+  HandlingUserInputHelper(bool aHandlingUserInput);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIJSRAIIHELPER
+
+private:
+  ~HandlingUserInputHelper();
+
+  bool mHandlingUserInput;
+  bool mDestructCalled;
+};
+
+NS_IMPL_ISUPPORTS(HandlingUserInputHelper, nsIJSRAIIHelper)
+
+HandlingUserInputHelper::HandlingUserInputHelper(bool aHandlingUserInput)
+  : mHandlingUserInput(aHandlingUserInput),
+    mDestructCalled(false)
+{
+  if (aHandlingUserInput) {
+    EventStateManager::StartHandlingUserInput();
+  }
+}
+
+HandlingUserInputHelper::~HandlingUserInputHelper()
+{
+  // We assert, but just in case, make sure we notify the ESM.
+  MOZ_ASSERT(mDestructCalled);
+  if (!mDestructCalled) {
+    Destruct();
+  }
+}
+
+NS_IMETHODIMP
+HandlingUserInputHelper::Destruct()
+{
+  if (NS_WARN_IF(mDestructCalled)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mDestructCalled = true;
+  if (mHandlingUserInput) {
+    EventStateManager::StopHandlingUserInput();
+  }
+
+  return NS_OK;
+}
+
+}
+
+NS_IMETHODIMP
+nsDOMWindowUtils::SetHandlingUserInput(bool aHandlingUserInput,
+                                       nsIJSRAIIHelper** aHelper)
+{
+  if (!nsContentUtils::IsCallerChrome()) {
+    return NS_ERROR_DOM_SECURITY_ERR;
+  }
+
+  nsRefPtr<HandlingUserInputHelper> helper(
+    new HandlingUserInputHelper(aHandlingUserInput));
+  helper.forget(aHelper);
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsDOMWindowUtils::GetContentAPZTestData(JSContext* aContext,
                                         JS::MutableHandleValue aOutContentTestData)

dom/interfaces/base/nsIDOMWindowUtils.idl

@@ -47,8 +47,9 @@ interface nsIDOMEventTarget;
 interface nsIRunnable;
 interface nsICompositionStringSynthesizer;
 interface nsITranslationNodeList;
+interface nsIJSRAIIHelper;
 
-[scriptable, uuid(46e3f206-9a8f-4d66-8248-7ec6a37de45a)]
+[scriptable, uuid(e156a9f5-d0e3-4a2f-a4a8-19c648d5ecb9)]
 interface nsIDOMWindowUtils : nsISupports {
 
   /**
@@ -1638,6 +1639,13 @@ interface nsIDOMWindowUtils : nsISupports {
     */
    AString getOMTAStyle(in nsIDOMElement aElement, in AString aProperty);
 
+   /**
+    * If we are currently handling user input, this informs the event state
+    * manager. Remember to call destruct() on the return value!
+    * See also nsIDOMWindowUtils::isHandlingUserInput.
+    */
+   nsIJSRAIIHelper setHandlingUserInput(in boolean aHandlingInput);
+
    /**
     * Get the content- and compositor-side APZ test data instances.
     * The return values are of type APZTestData (see APZTestData.webidl).
@@ -1674,3 +1682,12 @@ interface nsITranslationNodeList : nsISupports {
   // which its parent is not a translation node.
   boolean isTranslationRootAtIndex(in unsigned long index);
 };
+
+/**
+ * JS doesn't do RAII very well. We can use this interface to make remembering
+ * to destruct an object in a finally clause easier.
+ */
+[scriptable, uuid(52e5a996-d0a9-4efc-a6fa-24489c532b19)]
+interface nsIJSRAIIHelper : nsISupports {
+  void destruct();
+};