/* ev-file-monitor.c * this file is part of atril, a mate document viewer * * Copyright (C) 2008 Carlos Garcia Campos <carlosgc@gnome.org> * * Atril 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. * * Atril 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "config.h" #include <glib.h> #include <gio/gio.h> #include "ev-file-monitor.h" enum { CHANGED, N_SIGNALS }; struct _EvFileMonitorPrivate { GFileMonitor *monitor; guint timeout_id; }; static void ev_file_monitor_timeout_start (EvFileMonitor *ev_monitor); static void ev_file_monitor_timeout_stop (EvFileMonitor *ev_monitor); static void ev_file_monitor_changed_cb (GFileMonitor *monitor, GFile *file, GFile *other_file, GFileMonitorEvent event_type, EvFileMonitor *ev_monitor); #define EV_FILE_MONITOR_GET_PRIVATE(object) \ (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_FILE_MONITOR, EvFileMonitorPrivate)) G_DEFINE_TYPE (EvFileMonitor, ev_file_monitor, G_TYPE_OBJECT) static guint signals[N_SIGNALS] = { 0 }; static void ev_file_monitor_init (EvFileMonitor *ev_monitor) { ev_monitor->priv = EV_FILE_MONITOR_GET_PRIVATE (ev_monitor); } static void ev_file_monitor_finalize (GObject *object) { EvFileMonitor *ev_monitor = EV_FILE_MONITOR (object); ev_file_monitor_timeout_stop (ev_monitor); if (ev_monitor->priv->monitor) { g_signal_handlers_disconnect_by_func (ev_monitor->priv->monitor, ev_file_monitor_changed_cb, ev_monitor); g_object_unref (ev_monitor->priv->monitor); ev_monitor->priv->monitor = NULL; } G_OBJECT_CLASS (ev_file_monitor_parent_class)->finalize (object); } static void ev_file_monitor_class_init (EvFileMonitorClass *klass) { GObjectClass *g_object_class = G_OBJECT_CLASS (klass); g_type_class_add_private (g_object_class, sizeof (EvFileMonitorPrivate)); g_object_class->finalize = ev_file_monitor_finalize; /* Signals */ signals[CHANGED] = g_signal_new ("changed", EV_TYPE_FILE_MONITOR, G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (EvFileMonitorClass, changed), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); } static gboolean timeout_cb (EvFileMonitor *ev_monitor) { g_signal_emit (ev_monitor, signals[CHANGED], 0); ev_monitor->priv->timeout_id = 0; return FALSE; } static void ev_file_monitor_timeout_start (EvFileMonitor *ev_monitor) { ev_file_monitor_timeout_stop (ev_monitor); ev_monitor->priv->timeout_id = g_timeout_add_seconds (5, (GSourceFunc)timeout_cb, ev_monitor); } static void ev_file_monitor_timeout_stop (EvFileMonitor *ev_monitor) { if (ev_monitor->priv->timeout_id > 0) { g_source_remove (ev_monitor->priv->timeout_id); ev_monitor->priv->timeout_id = 0; } } static void ev_file_monitor_changed_cb (GFileMonitor *monitor, GFile *file, GFile *other_file, GFileMonitorEvent event_type, EvFileMonitor *ev_monitor) { switch (event_type) { case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT: ev_file_monitor_timeout_stop (ev_monitor); g_signal_emit (ev_monitor, signals[CHANGED], 0); break; case G_FILE_MONITOR_EVENT_CHANGED: ev_file_monitor_timeout_start (ev_monitor); break; default: break; } } EvFileMonitor * ev_file_monitor_new (const gchar *uri) { EvFileMonitor *ev_monitor; GFile *file; GError *error = NULL; ev_monitor = EV_FILE_MONITOR (g_object_new (EV_TYPE_FILE_MONITOR, NULL)); file = g_file_new_for_uri (uri); ev_monitor->priv->monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, &error); if (ev_monitor->priv->monitor) { g_signal_connect (ev_monitor->priv->monitor, "changed", G_CALLBACK (ev_file_monitor_changed_cb), ev_monitor); } else if (error) { g_warning ("%s", error->message); g_error_free (error); } g_object_unref (file); return ev_monitor; }