mirror of
https://gitlab.gnome.org/GNOME/evince
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174 lines
4.4 KiB
C
174 lines
4.4 KiB
C
/* ev-file-monitor.c
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* this file is part of evince, a gnome document viewer
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*
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* Copyright (C) 2008 Carlos Garcia Campos <carlosgc@gnome.org>
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*
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* Evince is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Evince is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <gio/gio.h>
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#include "ev-file-monitor.h"
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enum {
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CHANGED,
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N_SIGNALS
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};
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typedef struct {
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GFileMonitor *monitor;
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guint timeout_id;
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} EvFileMonitorPrivate;
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static void ev_file_monitor_timeout_start (EvFileMonitor *ev_monitor);
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static void ev_file_monitor_timeout_stop (EvFileMonitor *ev_monitor);
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static void ev_file_monitor_changed_cb (GFileMonitor *monitor,
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GFile *file,
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GFile *other_file,
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GFileMonitorEvent event_type,
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EvFileMonitor *ev_monitor);
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G_DEFINE_TYPE_WITH_PRIVATE (EvFileMonitor, ev_file_monitor, G_TYPE_OBJECT)
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#define GET_PRIVATE(o) ev_file_monitor_get_instance_private (o)
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static guint signals[N_SIGNALS];
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static void
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ev_file_monitor_init (EvFileMonitor *ev_monitor)
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{
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}
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static void
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ev_file_monitor_finalize (GObject *object)
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{
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EvFileMonitor *ev_monitor = EV_FILE_MONITOR (object);
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EvFileMonitorPrivate *priv = GET_PRIVATE (ev_monitor);
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ev_file_monitor_timeout_stop (ev_monitor);
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if (priv->monitor) {
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g_signal_handlers_disconnect_by_func (priv->monitor,
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ev_file_monitor_changed_cb,
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ev_monitor);
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g_object_unref (priv->monitor);
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priv->monitor = NULL;
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}
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G_OBJECT_CLASS (ev_file_monitor_parent_class)->finalize (object);
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}
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static void
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ev_file_monitor_class_init (EvFileMonitorClass *klass)
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{
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GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
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g_object_class->finalize = ev_file_monitor_finalize;
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/* Signals */
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signals[CHANGED] =
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g_signal_new ("changed",
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EV_TYPE_FILE_MONITOR,
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (EvFileMonitorClass, changed),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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}
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static gboolean
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timeout_cb (EvFileMonitor *ev_monitor)
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{
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EvFileMonitorPrivate *priv = GET_PRIVATE (ev_monitor);
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g_signal_emit (ev_monitor, signals[CHANGED], 0);
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priv->timeout_id = 0;
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return FALSE;
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}
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static void
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ev_file_monitor_timeout_start (EvFileMonitor *ev_monitor)
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{
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EvFileMonitorPrivate *priv = GET_PRIVATE (ev_monitor);
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ev_file_monitor_timeout_stop (ev_monitor);
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priv->timeout_id =
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g_timeout_add_seconds (5, (GSourceFunc)timeout_cb, ev_monitor);
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}
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static void
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ev_file_monitor_timeout_stop (EvFileMonitor *ev_monitor)
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{
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EvFileMonitorPrivate *priv = GET_PRIVATE (ev_monitor);
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if (priv->timeout_id > 0) {
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g_source_remove (priv->timeout_id);
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priv->timeout_id = 0;
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}
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}
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static void
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ev_file_monitor_changed_cb (GFileMonitor *monitor,
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GFile *file,
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GFile *other_file,
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GFileMonitorEvent event_type,
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EvFileMonitor *ev_monitor)
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{
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switch (event_type) {
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case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
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ev_file_monitor_timeout_stop (ev_monitor);
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g_signal_emit (ev_monitor, signals[CHANGED], 0);
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break;
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case G_FILE_MONITOR_EVENT_CHANGED:
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ev_file_monitor_timeout_start (ev_monitor);
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break;
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default:
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break;
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}
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}
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EvFileMonitor *
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ev_file_monitor_new (const gchar *uri)
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{
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EvFileMonitor *ev_monitor;
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EvFileMonitorPrivate *priv;
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GFile *file;
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GError *error = NULL;
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ev_monitor = EV_FILE_MONITOR (g_object_new (EV_TYPE_FILE_MONITOR, NULL));
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priv = GET_PRIVATE (ev_monitor);
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file = g_file_new_for_uri (uri);
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priv->monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, &error);
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if (priv->monitor) {
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g_signal_connect (priv->monitor, "changed",
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G_CALLBACK (ev_file_monitor_changed_cb), ev_monitor);
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} else if (error) {
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g_warning ("%s", error->message);
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g_error_free (error);
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}
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g_object_unref (file);
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return ev_monitor;
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}
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