/****************************************************************************

 Copyright (C) 2001-2003 Lubos Lunak        <l.lunak@kde.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 KXMESSAGES_H
#define KXMESSAGES_H

#include <kwindowsystem_export.h>
#include <QObject>
#include <QMap>

#include <config-kwindowsystem.h> // KWINDOWSYSTEM_HAVE_X11
#if KWINDOWSYSTEM_HAVE_X11
#include <xcb/xcb.h>
typedef struct _XDisplay Display;

class QString;

class KXMessagesPrivate;

/**
 * Sending string messages to other applications using the X Client Messages.
 *
 * Used internally by KStartupInfo and kstart.
 * You usually don't want to use this, use D-Bus instead.
 *
 * @internal
 *
 * @author Lubos Lunak <l.lunak@kde.org>
 */
class KWINDOWSYSTEM_EXPORT KXMessages : public QObject
{
    Q_OBJECT
public:
    /**
     * Creates an instance which will receive X messages.
     *
     * @param accept_broadcast if non-nullptr, all broadcast messages with
     *                         this message type will be received.
     * @param parent the parent of this widget
     */
    explicit KXMessages(const char *accept_broadcast = nullptr, QObject *parent = nullptr);

    /**
     * @overload
     * Overload passing in the xcb_connection_t to use instead relying on platform xcb.
     *
     * @param connection The xcb connection
     * @param rootWindow The rootWindow to use
     * @param accept_broadcast if non-nullptr, all broadcast messages with
     *                         this message type will be received.
     * @param parent the parent of this object
     * @since 5.8
     **/
    explicit KXMessages(xcb_connection_t *connection, xcb_window_t rootWindow, const char *accept_broadcast = nullptr, QObject *parent = nullptr);

    ~KXMessages() override;
    /**
     * Broadcasts the given message with the given message type.
     * @param msg_type the type of the message
     * @param message the message itself
         * @param screen X11 screen to use, -1 for the default
     */
    void broadcastMessage(const char *msg_type, const QString &message, int screen = -1);
// Not 5.0, as KStartupInfo::sendStartupX uses this, and is only deprecated for 5.18
#if KWINDOWSYSTEM_ENABLE_DEPRECATED_SINCE(5, 18)
    /**
     * Broadcasts the given message with the given message type.
     *
     * @param disp X11 connection which will be used instead of
     *             QX11Info::display()
     * @param msg_type the type of the message
     * @param message the message itself
         * @param screen X11 screen to use, -1 for the default
     * @return false when an error occurred, true otherwise
     * @deprecated since 5.0 use xcb variant
     */
    KWINDOWSYSTEM_DEPRECATED_VERSION(5, 0, "Use KXMessages::broadcastMessageX(xcb_connection_t *, const char *,                                   const QString &, int)")
    static bool broadcastMessageX(Display *disp, const char *msg_type,
                                  const QString &message, int screen = -1);
#endif
    /**
     * Broadcasts the given message with the given message type.
     *
     * @param c X11 connection which will be used instead of
     *             QX11Info::connection()
     * @param msg_type the type of the message
     * @param message the message itself
     * @param screenNumber X11 screen to use
     * @return false when an error occurred, true otherwise
     */
    static bool broadcastMessageX(xcb_connection_t *c, const char *msg_type,
                                  const QString &message, int screenNumber);

#if 0 // currently unused
    /**
     * Sends the given message with the given message type only to given
         * window.
         *
         * @param w X11 handle for the destination window
     * @param msg_type the type of the message
     * @param message the message itself
     */
    void sendMessage(WId w, const char *msg_type, const QString &message);
    /**
     * Sends the given message with the given message type only to given
         * window.
         *
     * @param disp X11 connection which will be used instead of
     *             QX11Info::display()
         * @param w X11 handle for the destination window
     * @param msg_type the type of the message
     * @param message the message itself
     * @return false when an error occurred, true otherwise
     */
    static bool sendMessageX(Display *disp, WId w, const char *msg_type,
                             const QString &message);
#endif

Q_SIGNALS:
    /**
     * Emitted when a message was received.
     * @param message the message that has been received
     */
    void gotMessage(const QString &message);
private:
    friend class KXMessagesPrivate;
    KXMessagesPrivate *const d;
};

#endif
#endif
