/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Assistant module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef OPENPAGESMANAGER_H
#define OPENPAGESMANAGER_H

#include <QtCore/QObject>

QT_BEGIN_NAMESPACE

class QAbstractItemView;
class QModelIndex;
class QUrl;

class HelpViewer;
class OpenPagesModel;
class OpenPagesSwitcher;
class OpenPagesWidget;

class OpenPagesManager : public QObject
{
    Q_OBJECT
public:
    static OpenPagesManager *createInstance(QObject *parent,
        bool defaultCollection, const QUrl &cmdLineUrl);
    static OpenPagesManager *instance();

    bool pagesOpenForNamespace(const QString &nameSpace) const;
    void closePages(const QString &nameSpace);
    void reloadPages(const QString &nameSpace);

    QAbstractItemView* openPagesWidget() const;

    int pageCount() const;
    void setCurrentPage(int index);

public slots:
    HelpViewer *createPage(const QUrl &url, bool fromSearch = false);
    HelpViewer *createNewPageFromSearch(const QUrl &url);
    HelpViewer *createPage();
    void closeCurrentPage();

    void nextPage();
    void nextPageWithSwitcher();
    void previousPage();
    void previousPageWithSwitcher();

    void closePage(HelpViewer *page);
    void setCurrentPage(HelpViewer *page);

private slots:
    void setCurrentPage(const QModelIndex &index);
    void closePage(const QModelIndex &index);
    void closePagesExcept(const QModelIndex &index);

private:
    OpenPagesManager(QObject *parent, bool defaultCollection,
        const QUrl &cmdLineUrl);
    ~OpenPagesManager();

    void setupInitialPages(bool defaultCollection, const QUrl &cmdLineUrl);
    void closeOrReloadPages(const QString &nameSpace, bool tryReload);
    void removePage(int index);

    void nextOrPreviousPage(int offset);
    void showSwitcherOrSelectPage() const;

    OpenPagesModel *m_model;
    OpenPagesWidget *m_openPagesWidget;
    OpenPagesSwitcher *m_openPagesSwitcher;

    static OpenPagesManager *m_instance;
};

QT_END_NAMESPACE

#endif // OPENPAGESMANAGER_H