The Tor Browser: accessible/src/base/nsEventShell.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsEventShell.h"

     8 #include "nsAccUtils.h"

    10 #include "mozilla/StaticPtr.h"

    12 using namespace mozilla;

    13 using namespace mozilla::a11y;

    15 ////////////////////////////////////////////////////////////////////////////////

    16 // nsEventShell

    17 ////////////////////////////////////////////////////////////////////////////////

    19 void

    20 nsEventShell::FireEvent(AccEvent* aEvent)

    21 {

    22   if (!aEvent)

    23     return;

    25   Accessible* accessible = aEvent->GetAccessible();

    26   NS_ENSURE_TRUE_VOID(accessible);

    28   nsINode* node = accessible->GetNode();

    29   if (node) {

    30     sEventTargetNode = node;

    31     sEventFromUserInput = aEvent->IsFromUserInput();

    32   }

    34   accessible->HandleAccEvent(aEvent);

    36   sEventTargetNode = nullptr;

    37 }

    39 void

    40 nsEventShell::FireEvent(uint32_t aEventType, Accessible* aAccessible,

    41                         EIsFromUserInput aIsFromUserInput)

    42 {

    43   NS_ENSURE_TRUE_VOID(aAccessible);

    45   nsRefPtr<AccEvent> event = new AccEvent(aEventType, aAccessible,

    46                                           aIsFromUserInput);

    48   FireEvent(event);

    49 }

    51 void

    52 nsEventShell::GetEventAttributes(nsINode *aNode,

    53                                  nsIPersistentProperties *aAttributes)

    54 {

    55   if (aNode != sEventTargetNode)

    56     return;

    58   nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::eventFromInput,

    59                          sEventFromUserInput ? NS_LITERAL_STRING("true") :

    60                                                NS_LITERAL_STRING("false"));

    61 }

    63 ////////////////////////////////////////////////////////////////////////////////

    64 // nsEventShell: private

    66 bool nsEventShell::sEventFromUserInput = false;

    67 StaticRefPtr<nsINode> nsEventShell::sEventTargetNode;

The Tor Browser / file revision

accessible/src/base/nsEventShell.cpp@97036ab72558

accessible/src/base/nsEventShell.cpp