// SystemTray.hh
// Copyright (c) 2003 - 2006 Henrik Kinnunen (fluxgen at fluxbox dot org)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

#ifndef SYSTEMTRAY_HH
#define SYSTEMTRAY_HH


#include "FbTk/FbWindow.hh"
#include "FbTk/EventHandler.hh"
#include "FbTk/Signal.hh"

#include "ToolTheme.hh"
#include "ToolbarItem.hh"

#include <list>
#include <memory>

class BScreen;
class ButtonTheme;
class TrayWindow;
class AtomHandler;

namespace FbTk {
template <class T> class ThemeProxy;
class Observer;
}

class SystemTray: public ToolbarItem, public FbTk::EventHandler,
                  private FbTk::SignalTracker {
public:

    explicit SystemTray(const FbTk::FbWindow &parent,
                        FbTk::ThemeProxy<ToolTheme> &theme, BScreen& screen);
    virtual ~SystemTray();

    void move(int x, int y);
    void resize(unsigned int width, unsigned int height);
    void moveResize(int x, int y,
                    unsigned int width, unsigned int height);
    void show();
    void hide();

    bool active() { return !m_clients.empty(); }

    bool clientMessage(const XClientMessageEvent &event);
    void exposeEvent(XExposeEvent &event);
    void handleEvent(XEvent &event);

    void addClient(Window win, bool using_xembed);
    void removeClient(Window win, bool destroyed);

    unsigned int width() const;
    unsigned int height() const;
    unsigned int borderWidth() const;

    int numClients() const { return m_clients.size(); }
    const FbTk::FbWindow &window() const { return m_window; }

    void renderTheme(unsigned char alpha) { 
        m_window.setBorderWidth(m_theme->border().width());
        m_window.setBorderColor(m_theme->border().color());
        m_window.setAlpha(alpha); 
        update(); 
    }
    void updateSizing() { m_window.setBorderWidth(m_theme->border().width()); }

    void parentMoved() { m_window.parentMoved(); }

    static Atom getXEmbedInfoAtom();

private:
    /// Called when an update for a screen is needed.
    void updateForScreen(BScreen &screen) {
        update();
    }
    void update();

    typedef std::list<TrayWindow *> ClientList;
    ClientList::iterator findClient(Window win);

    void rearrangeClients();
    void removeAllClients();
    void hideClient(TrayWindow *traywin, bool destroyed = false);
    void showClient(TrayWindow *traywin);

    FbTk::FbWindow m_window;
    FbTk::ThemeProxy<ToolTheme> &m_theme;
    BScreen& m_screen;
    Pixmap m_pixmap;

    std::auto_ptr<AtomHandler> m_handler;

    ClientList m_clients;
    size_t m_num_visible_clients;

    // gaim/pidgin seems to barf if the selection is not an independent window.
    // I suspect it's an interacton with parent relationship and gdk window caching.
    FbTk::FbWindow m_selection_owner;
    std::auto_ptr<FbTk::Observer> m_observer;
};

#endif // SYSTEMTRAY_HH
