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nautilus-monitor.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-

   nautilus-monitor.c: file and directory change monitoring for nautilus
 
   Copyright (C) 2000, 2001 Eazel, Inc.
  
   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, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
  
   Authors: Seth Nickell <seth@eazel.com>
            Darin Adler <darin@bentspoon.com>
          Alex Graveley <alex@ximian.com>
*/

#include <config.h>
#include "nautilus-monitor.h"
#include "nautilus-file-changes-queue.h"
#include "nautilus-file-utilities.h"

#include <gio/gio.h>

struct NautilusMonitor {
      GFileMonitor *monitor;
};

gboolean
nautilus_monitor_active (void)
{
      static gboolean tried_monitor = FALSE;
      static gboolean monitor_success;
      GFileMonitor *dir_monitor;
      GFile *file;

      if (tried_monitor == FALSE) { 
            file = g_file_new_for_path (g_get_home_dir ());
            dir_monitor = g_file_monitor_directory (file, G_FILE_MONITOR_NONE, NULL, NULL);
            g_object_unref (file);
            
            monitor_success = (dir_monitor != NULL);
            if (dir_monitor) {
                  g_object_unref (dir_monitor);
            }

            tried_monitor = TRUE;
      }

      return monitor_success;
}

static gboolean call_consume_changes_idle_id = 0;

static gboolean
call_consume_changes_idle_cb (gpointer not_used)
{
      nautilus_file_changes_consume_changes (TRUE);
      call_consume_changes_idle_id = 0;
      return FALSE;
}

static void
dir_changed (GFileMonitor* monitor,
           GFile *child,
           GFile *other_file,
           GFileMonitorEvent event_type,
           gpointer user_data)
{
      char *uri, *to_uri;
      
      uri = g_file_get_uri (child);
      to_uri = NULL;
      if (other_file) {
            to_uri = g_file_get_uri (other_file);
      }

      switch (event_type) {
      default:
      case G_FILE_MONITOR_EVENT_CHANGED:
            /* ignore */
            break;
      case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
      case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
            nautilus_file_changes_queue_file_changed (child);
            break;
      case G_FILE_MONITOR_EVENT_DELETED:
            nautilus_file_changes_queue_file_removed (child);
            break;
      case G_FILE_MONITOR_EVENT_CREATED:
            nautilus_file_changes_queue_file_added (child);
            break;
            
      case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
            /* TODO: Do something */
            break;
      case G_FILE_MONITOR_EVENT_UNMOUNTED:
            /* TODO: Do something */
            break;
      }

      g_free (uri);
      g_free (to_uri);

      if (call_consume_changes_idle_id == 0) {
            call_consume_changes_idle_id = 
                  g_idle_add (call_consume_changes_idle_cb, NULL);
      }
}
 
NautilusMonitor *
nautilus_monitor_directory (GFile *location)
{
      GFileMonitor *dir_monitor;
      NautilusMonitor *ret;

      dir_monitor = g_file_monitor_directory (location, G_FILE_MONITOR_WATCH_MOUNTS, NULL, NULL);

      ret = g_new0 (NautilusMonitor, 1);
      ret->monitor = dir_monitor;

      if (ret->monitor) {
            g_signal_connect (ret->monitor, "changed", (GCallback)dir_changed, ret);
      }

      /* We return a monitor even on failure, so we can avoid later trying again */
      return ret;
}

void 
nautilus_monitor_cancel (NautilusMonitor *monitor)
{
      if (monitor->monitor != NULL) {
            g_signal_handlers_disconnect_by_func (monitor->monitor, dir_changed, monitor);
            g_file_monitor_cancel (monitor->monitor);
            g_object_unref (monitor->monitor);
      }

      g_free (monitor);
}

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