The Tor Browser: widget/qt/nsAppShell.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: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* vim:expandtab:shiftwidth=4:tabstop=4:

     3  */

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

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

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

     8 #include "nsAppShell.h"

     9 #include <QGuiApplication>

    10 #include <unistd.h>

    11 #include <fcntl.h>

    12 #include <errno.h>

    14 #include <qabstracteventdispatcher.h>

    15 #include <qthread.h>

    17 #include "prenv.h"

    18 #include "nsQAppInstance.h"

    20 #ifdef MOZ_LOGGING

    21 #define FORCE_PR_LOG

    22 #include "prlog.h"

    23 #endif

    25 #ifdef PR_LOGGING

    26 PRLogModuleInfo *gWidgetLog = nullptr;

    27 PRLogModuleInfo *gWidgetFocusLog = nullptr;

    28 PRLogModuleInfo *gWidgetIMLog = nullptr;

    29 PRLogModuleInfo *gWidgetDrawLog = nullptr;

    30 #endif

    32 static int sPokeEvent;

    34 nsAppShell::~nsAppShell()

    35 {

    36     nsQAppInstance::Release();

    37 }

    39 nsresult

    40 nsAppShell::Init()

    41 {

    42 #ifdef PR_LOGGING

    43     if (!gWidgetLog)

    44         gWidgetLog = PR_NewLogModule("Widget");

    45     if (!gWidgetFocusLog)

    46         gWidgetFocusLog = PR_NewLogModule("WidgetFocus");

    47     if (!gWidgetIMLog)

    48         gWidgetIMLog = PR_NewLogModule("WidgetIM");

    49     if (!gWidgetDrawLog)

    50         gWidgetDrawLog = PR_NewLogModule("WidgetDraw");

    51 #endif

    52     sPokeEvent = QEvent::registerEventType();

    54     nsQAppInstance::AddRef();

    56     return nsBaseAppShell::Init();

    57 }

    59 void

    60 nsAppShell::ScheduleNativeEventCallback()

    61 {

    62     QCoreApplication::postEvent(this,

    63                                 new QEvent((QEvent::Type) sPokeEvent));

    64 }

    67 bool

    68 nsAppShell::ProcessNextNativeEvent(bool mayWait)

    69 {

    70     QEventLoop::ProcessEventsFlags flags = QEventLoop::AllEvents;

    72     if (mayWait)

    73         flags |= QEventLoop::WaitForMoreEvents;

    75     QAbstractEventDispatcher *dispatcher =  QAbstractEventDispatcher::instance(QThread::currentThread());

    76     if (!dispatcher)

    77         return false;

    79     return dispatcher->processEvents(flags) ? true : false;

    80 }

    82 bool

    83 nsAppShell::event (QEvent *e)

    84 {

    85     if (e->type() == sPokeEvent) {

    86         NativeEventCallback();

    87         return true;

    88     }

    90     return false;

    91 }

The Tor Browser / file revision

widget/qt/nsAppShell.cpp@97036ab72558

widget/qt/nsAppShell.cpp