/*
  Copyright (C) 2007 Staikos Computing Services Inc.  <info@staikos.net>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library 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
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; see the file COPYING.LIB.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.

  This class provides all functionality needed for tracking global history.
*/

#include "qwebhistoryinterface.h"

#include <QCoreApplication>

#include <wtf/Platform.h>
#include "DeprecatedString.h"

// FIXME: It's not correct to just implement a WebCore function in WebKit!
// This needs to be fixed to match other platforms.

namespace WebCore {

bool historyContains(const UChar* characters, unsigned length)
{
    if (!QWebHistoryInterface::defaultInterface())
        return false;

    return QWebHistoryInterface::defaultInterface()->historyContains(QString(reinterpret_cast<const QChar*>(characters), length));
}

} // namespace WebCore

static QWebHistoryInterface *default_interface;

static bool gRoutineAdded;

static void gCleanupInterface()
{
    delete default_interface;
    default_interface = 0;
}

/*!
  Sets a new default interface that will be used by all of WebKit
  for managing history.
*/
void QWebHistoryInterface::setDefaultInterface(QWebHistoryInterface *defaultInterface)
{
    if (default_interface == defaultInterface)
        return;
    if (default_interface)
        delete default_interface;
    default_interface = defaultInterface;
    if (!gRoutineAdded) {
        qAddPostRoutine(gCleanupInterface);
        gRoutineAdded = true;
    }
}

/*!
  Returns the default interface that will be used by WebKit. If no
  default interface has been set, QtWebkit will not track history.
*/
QWebHistoryInterface *QWebHistoryInterface::defaultInterface()
{
    return default_interface;
}

QWebHistoryInterface::QWebHistoryInterface(QObject *parent) : QObject(parent)
{
}

QWebHistoryInterface::~QWebHistoryInterface()
{
}