medit/moo/mooutils/moofilewatch.h

/*
 *   moofilewatch.h
 *
 *   Copyright (C) 2004-2010 by Yevgen Muntyan <emuntyan@users.sourceforge.net>
 *
 *   This file is part of medit.  medit is free software; you can
 *   redistribute it and/or modify it under the terms of the
 *   GNU Lesser General Public License as published by the
 *   Free Software Foundation; either version 2.1 of the License,
 *   or (at your option) any later version.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with medit.  If not, see <http://www.gnu.org/licenses/>.
 */

/* Files and directory monitor. Uses stat().
   On win32 does FindFirstChangeNotification and ReadDirectoryChangesW. */

#pragma once

#include <glib-object.h>
#include <moocpp/grefptr.h>

enum MooFileEventCode {
    MOO_FILE_EVENT_CHANGED,
    MOO_FILE_EVENT_CREATED,
    MOO_FILE_EVENT_DELETED,
    MOO_FILE_EVENT_ERROR
};

struct MooFileEvent {
    MooFileEventCode code;
    guint            monitor_id;
    char            *filename;
    GError          *error;
};

class MooFileWatch;

typedef void (*MooFileWatchCallback) (MooFileWatch& watch,
                                      MooFileEvent* event,
                                      gpointer      user_data);

namespace moo
{

template<>
class obj_ref_unref<MooFileWatch> : public obj_class_ref_unref<MooFileWatch>
{
};

using MooFileWatchPtr = grefptr<MooFileWatch>;

} // namespace moo

class MooFileWatch
{
public:
    MooFileWatch();

    static moo::MooFileWatchPtr create          (GError        **error);

    bool                        close           (GError        **error);

    guint                       create_monitor  (const char     *filename,
                                                 MooFileWatchCallback callback,
                                                 gpointer        data,
                                                 GDestroyNotify  notify,
                                                 GError        **error);

    void                        cancel_monitor  (guint           monitor_id);

    struct Impl;
    Impl&                       impl            () { return *m_impl; }

    void                        ref             ();
    void                        unref           ();

    MooFileWatch(const MooFileWatch&) = delete;
    MooFileWatch& operator=(const MooFileWatch&) = delete;

private:
    ~MooFileWatch();

    int                   m_ref;
    std::unique_ptr<Impl> m_impl;
};