/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2009 Martin Gräßlin <kde@martin-graesslin.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/

#ifndef KWIN_TABBOX_H
#define KWIN_TABBOX_H

#include <QTimer>
#include <QModelIndex>
#include "utils.h"
#include "tabbox/tabboxhandler.h"

class QKeyEvent;

namespace KWin
{

class Workspace;
class Client;
namespace TabBox
{
class TabBoxConfig;

class TabBoxHandlerImpl : public TabBoxHandler
{
public:
    TabBoxHandlerImpl();
    virtual ~TabBoxHandlerImpl();

    virtual int activeScreen() const;
    virtual TabBoxClient* activeClient() const;
    virtual int currentDesktop() const;
    virtual QString desktopName(TabBoxClient* client) const;
    virtual QString desktopName(int desktop) const;
    virtual TabBoxClient* nextClientFocusChain(TabBoxClient* client) const;
    virtual int nextDesktopFocusChain(int desktop) const;
    virtual int numberOfDesktops() const;
    virtual TabBoxClientList stackingOrder() const;
    virtual void raiseClient(TabBoxClient *client) const;
    virtual void restack(TabBoxClient *c, TabBoxClient *under);
    virtual TabBoxClient* clientToAddToList(TabBoxClient* client, int desktop, bool allDesktops) const;
    virtual TabBoxClient* desktopClient() const;
};

class TabBoxClientImpl : public TabBoxClient
{
public:
    TabBoxClientImpl();
    virtual ~TabBoxClientImpl();

    virtual QString caption() const;
    virtual QPixmap icon(const QSize& size = QSize(32, 32)) const;
    virtual WId window() const;
    virtual bool isMinimized() const;
    virtual int x() const;
    virtual int y() const;
    virtual int width() const;
    virtual int height() const;

    Client* client() const {
        return m_client;
    }
    void setClient(Client* client) {
        m_client = client;
    }

private:
    Client* m_client;
};

class TabBox : public QObject
{
    Q_OBJECT
public:
    TabBox(Workspace *ws);
    ~TabBox();

    Client* currentClient();
    ClientList currentClientList();
    int currentDesktop();
    QList< int > currentDesktopList();

    void setCurrentClient(Client* newClient);
    void setCurrentDesktop(int newDesktop);

    void setMode(TabBoxMode mode);
    TabBoxMode mode() const {
        return m_tabBoxMode;
    }

    void reset(bool partial_reset = false);
    void nextPrev(bool next = true);

    void delayedShow();
    void hide(bool abort = false);

    void refDisplay();
    void unrefDisplay();
    bool isDisplayed() const;

    void handleMouseEvent(XEvent*);
    void grabbedKeyEvent(QKeyEvent* event);

    Workspace* workspace() const;

    void reconfigure();

public slots:
    void show();

signals:
    void tabBoxAdded(int);
    void tabBoxClosed();
    void tabBoxUpdated();
    void tabBoxKeyEvent(QKeyEvent*);

private:
    void setCurrentIndex(QModelIndex index, bool notifyEffects = true);
    void loadConfig(const KConfigGroup& config, TabBoxConfig& tabBoxConfig);

private:
    Workspace* wspace;
    TabBoxMode m_tabBoxMode;
    QModelIndex m_index;
    TabBoxHandlerImpl* m_tabBox;
    bool m_delayShow;
    int m_delayShowTime;

    QTimer delayedShowTimer;
    int display_refcount;

    TabBoxConfig m_defaultConfig;
    TabBoxConfig m_alternativeConfig;
    TabBoxConfig m_desktopConfig;
    TabBoxConfig m_desktopListConfig;
    // false if an effect has referenced the tabbox
    // true if tabbox is active (independent on showTabbox setting)
    bool m_isShown;
};

/*!
  Returns the tab box' workspace
 */
inline Workspace* TabBox::workspace() const
{
    return wspace;
}

/*!
  Increase the reference count, preventing the default tabbox from showing.

  \sa unrefDisplay(), isDisplayed()
 */
inline void TabBox::refDisplay()
{
    ++display_refcount;
}

/*!
  Returns whether the tab box is being displayed, either natively or by an
  effect.

  \sa refDisplay(), unrefDisplay()
 */
inline bool TabBox::isDisplayed() const
{
    return display_refcount > 0;
}

} // namespace TabBox

} // namespace

#endif