/* GIO - GLib Input, Output and Streaming Library
 * 
 * Copyright (C) 2006-2007 Red Hat, Inc.
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 * Author: Alexander Larsson <alexl@redhat.com>
 */

#ifndef __G_FILE_MONITOR_H__
#define __G_FILE_MONITOR_H__

#include <glib-object.h>
#include "gfile.h"

G_BEGIN_DECLS

#define G_TYPE_FILE_MONITOR         (g_file_monitor_get_type ())
#define G_FILE_MONITOR(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FILE_MONITOR, GFileMonitor))
#define G_FILE_MONITOR_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_FILE_MONITOR, GFileMonitorClass))
#define G_IS_FILE_MONITOR(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_FILE_MONITOR))
#define G_IS_FILE_MONITOR_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_FILE_MONITOR))
#define G_FILE_MONITOR_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_FILE_MONITOR, GFileMonitorClass))

/**
 * GFileMonitorEvent:
 * @G_FILE_MONITOR_EVENT_CHANGED: a file changed.
 * @G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT: a hint that this was probably the last change in a set of changes.
 * @G_FILE_MONITOR_EVENT_DELETED: a file was deleted.
 * @G_FILE_MONITOR_EVENT_CREATED: a file was created.
 * @G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED: a file attribute was changed.
 * @G_FILE_MONITOR_EVENT_PRE_UNMOUNT: the file location will soon be unmounted.
 * @G_FILE_MONITOR_EVENT_UNMOUNTED: the file location was unmounted.
 * 
 * Specifies what type of event a monitor event is.
 **/
typedef enum {
  G_FILE_MONITOR_EVENT_CHANGED,
  G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT,
  G_FILE_MONITOR_EVENT_DELETED,
  G_FILE_MONITOR_EVENT_CREATED,
  G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED,
  G_FILE_MONITOR_EVENT_PRE_UNMOUNT,
  G_FILE_MONITOR_EVENT_UNMOUNTED
} GFileMonitorEvent;

GType g_file_monitor_event_get_type (void) G_GNUC_CONST;
#define G_TYPE_FILE_MONITOR_EVENT (g_file_monitor_event_get_type ())

typedef struct _GFileMonitorClass	GFileMonitorClass;
typedef struct _GFileMonitorPrivate	GFileMonitorPrivate;

/**
 * GFileMonitor:
 * 
 * Watches for changes to a file.
 **/
struct _GFileMonitor
{
  GObject parent_instance;

  /*< private >*/
  GFileMonitorPrivate *priv;
};

struct _GFileMonitorClass
{
  GObjectClass parent_class;
  
  /* Signals */
  void (* changed) (GFileMonitor* monitor,
		    GFile* file,
		    GFile* other_file,
		    GFileMonitorEvent event_type);
  
  /* Virtual Table */
  gboolean	(*cancel)(GFileMonitor* monitor);

  /*< private >*/
  /* Padding for future expansion */
  void (*_g_reserved1) (void);
  void (*_g_reserved2) (void);
  void (*_g_reserved3) (void);
  void (*_g_reserved4) (void);
  void (*_g_reserved5) (void);
};

GType g_file_monitor_get_type (void) G_GNUC_CONST;

gboolean g_file_monitor_cancel         (GFileMonitor *monitor);
gboolean g_file_monitor_is_cancelled   (GFileMonitor *monitor);
void     g_file_monitor_set_rate_limit (GFileMonitor *monitor,
					int           limit_msecs);


/* For implementations */
void g_file_monitor_emit_event (GFileMonitor      *monitor,
				GFile             *child,
				GFile             *other_file,
				GFileMonitorEvent  event_type);

G_END_DECLS

#endif /* __G_FILE_MONITOR_H__ */