/*
 *  Copyright (C) 2000 Harri Porten (porten@kde.org)
 *  Copyright (c) 2000 Daniel Molkentin (molkentin@kde.org)
 *  Copyright (c) 2000 Stefan Schimanski (schimmi@kde.org)
 *  Copyright (C) 2003, 2004, 2005, 2006 Apple Inc.
 *  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "config.h"
#include "Navigator.h"

#include "CookieJar.h"
#include "DOMMimeTypeArray.h"
#include "DOMPluginArray.h"
#include "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "Geolocation.h"
#include "Language.h"
#include "Page.h"
#include "PluginData.h"
#include "ScriptController.h"
#include "SecurityOrigin.h"
#include "Settings.h"
#include <wtf/HashSet.h>
#include <wtf/NumberOfCores.h>
#include <wtf/StdLibExtras.h>

using namespace WTF;

namespace WebCore {

Navigator::Navigator(Frame* frame)
    : DOMWindowProperty(frame)
{
}

Navigator::~Navigator()
{
}

// If this function returns true, we need to hide the substring "4." that would otherwise
// appear in the appVersion string. This is to avoid problems with old versions of a
// library called OpenCube QuickMenu, which as of this writing is still being used on
// sites such as nwa.com -- the library thinks Safari is Netscape 4 if we don't do this!
static bool shouldHideFourDot(Frame* frame)
{
    const String* sourceURL = frame->script().sourceURL();
    if (!sourceURL)
        return false;
    if (!(sourceURL->endsWith("/dqm_script.js") || sourceURL->endsWith("/dqm_loader.js") || sourceURL->endsWith("/tdqm_loader.js")))
        return false;
    return frame->settings().needsSiteSpecificQuirks();
}

String Navigator::appVersion() const
{
    if (!m_frame)
        return String();
    String appVersion = NavigatorBase::appVersion();
    if (shouldHideFourDot(m_frame))
        appVersion.replace("4.", "4_");
    return appVersion;
}

String Navigator::language() const
{
    return defaultLanguage();
}

String Navigator::userAgent() const
{
    if (!m_frame)
        return String();
        
    // If the frame is already detached, FrameLoader::userAgent may malfunction, because it calls a client method
    // that uses frame's WebView (at least, in Mac WebKit).
    if (!m_frame->page())
        return String();
        
    return m_frame->loader().userAgent(m_frame->document()->url());
}

DOMPluginArray* Navigator::plugins() const
{
    if (!m_plugins)
        m_plugins = DOMPluginArray::create(m_frame);
    return m_plugins.get();
}

DOMMimeTypeArray* Navigator::mimeTypes() const
{
    if (!m_mimeTypes)
        m_mimeTypes = DOMMimeTypeArray::create(m_frame);
    return m_mimeTypes.get();
}

bool Navigator::cookieEnabled() const
{
    if (!m_frame)
        return false;

    if (m_frame->page() && !m_frame->page()->settings().cookieEnabled())
        return false;

    return cookiesEnabled(m_frame->document());
}

bool Navigator::javaEnabled() const
{
    if (!m_frame)
        return false;

    if (!m_frame->settings().isJavaEnabled())
        return false;
    if (m_frame->document()->securityOrigin()->isLocal() && !m_frame->settings().isJavaEnabledForLocalFiles())
        return false;

    return true;
}

#if defined(ENABLE_NAVIGATOR_HWCONCURRENCY)
int Navigator::hardwareConcurrency() const
{
    // Enforce a maximum for the number of cores reported to mitigate
    // fingerprinting for the minority of machines with large numbers of cores.
    // If machines with more than 8 cores become commonplace, we should bump this number.
    // see https://bugs.webkit.org/show_bug.cgi?id=132588 for the
    // rationale behind this decision.
#if PLATFORM(IOS)
    const int maxCoresToReport = 2;
#else
    const int maxCoresToReport = 8;
#endif
    int hardwareConcurrency = numberOfProcessorCores();

    if (hardwareConcurrency > maxCoresToReport)
        return maxCoresToReport;

    return hardwareConcurrency;
}
#endif

#if PLATFORM(IOS)
bool Navigator::standalone() const
{
    return m_frame && m_frame->settings().standalone();
}
#endif

void Navigator::getStorageUpdates()
{
    // FIXME: Remove this method or rename to yieldForStorageUpdates.
}

} // namespace WebCore