1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Alexander Larsson <alexl@redhat.com>
26 #include "gpollfilemonitor.h"
28 #include "gfilemonitor.h"
29 #include "gfileinfo.h"
32 static gboolean
g_poll_file_monitor_cancel (GFileMonitor
* monitor
);
33 static void schedule_poll_timeout (GPollFileMonitor
* poll_monitor
);
35 struct _GPollFileMonitor
37 GFileMonitor parent_instance
;
43 #define POLL_TIME_SECS 5
45 #define g_poll_file_monitor_get_type _g_poll_file_monitor_get_type
46 G_DEFINE_TYPE (GPollFileMonitor
, g_poll_file_monitor
, G_TYPE_FILE_MONITOR
)
49 g_poll_file_monitor_finalize (GObject
* object
)
51 GPollFileMonitor
* poll_monitor
;
53 poll_monitor
= G_POLL_FILE_MONITOR (object
);
55 g_object_unref (poll_monitor
->file
);
57 G_OBJECT_CLASS (g_poll_file_monitor_parent_class
)->finalize (object
);
62 g_poll_file_monitor_class_init (GPollFileMonitorClass
* klass
)
64 GObjectClass
* gobject_class
= G_OBJECT_CLASS (klass
);
65 GFileMonitorClass
*file_monitor_class
= G_FILE_MONITOR_CLASS (klass
);
67 gobject_class
->finalize
= g_poll_file_monitor_finalize
;
69 file_monitor_class
->cancel
= g_poll_file_monitor_cancel
;
73 g_poll_file_monitor_init (GPollFileMonitor
* poll_monitor
)
78 safe_strcmp (const char *a
,
81 if (a
== NULL
&& b
== NULL
)
92 calc_event_type (GFileInfo
*last
,
95 if (last
== NULL
&& new == NULL
)
98 if (last
== NULL
&& new != NULL
)
99 return G_FILE_MONITOR_EVENT_CREATED
;
101 if (last
!= NULL
&& new == NULL
)
102 return G_FILE_MONITOR_EVENT_DELETED
;
104 if (safe_strcmp (g_file_info_get_etag (last
),
105 g_file_info_get_etag (new)))
106 return G_FILE_MONITOR_EVENT_CHANGED
;
108 if (g_file_info_get_size (last
) !=
109 g_file_info_get_size (new))
110 return G_FILE_MONITOR_EVENT_CHANGED
;
116 got_new_info (GObject
*source_object
,
120 GPollFileMonitor
* poll_monitor
= user_data
;
124 info
= g_file_query_info_finish (poll_monitor
->file
, res
, NULL
);
126 if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor
)))
128 event
= calc_event_type (poll_monitor
->last_info
, info
);
132 g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor
),
135 /* We're polling so slowly anyway, so always emit the done hint */
136 if (event
== G_FILE_MONITOR_EVENT_CHANGED
)
137 g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor
),
139 NULL
, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT
);
142 if (poll_monitor
->last_info
)
144 g_object_unref (poll_monitor
->last_info
);
145 poll_monitor
->last_info
= NULL
;
149 poll_monitor
->last_info
= g_object_ref (info
);
151 schedule_poll_timeout (poll_monitor
);
155 g_object_unref (info
);
157 g_object_unref (poll_monitor
);
161 poll_file_timeout (gpointer data
)
163 GPollFileMonitor
* poll_monitor
= data
;
165 poll_monitor
->timeout
= FALSE
;
167 g_file_query_info_async (poll_monitor
->file
, G_FILE_ATTRIBUTE_ETAG_VALUE
"," G_FILE_ATTRIBUTE_STANDARD_SIZE
,
168 0, 0, NULL
, got_new_info
, g_object_ref (poll_monitor
));
174 schedule_poll_timeout (GPollFileMonitor
* poll_monitor
)
176 poll_monitor
->timeout
= g_timeout_add_seconds (POLL_TIME_SECS
, poll_file_timeout
, poll_monitor
);
180 got_initial_info (GObject
*source_object
,
184 GPollFileMonitor
* poll_monitor
= user_data
;
187 info
= g_file_query_info_finish (poll_monitor
->file
, res
, NULL
);
189 poll_monitor
->last_info
= info
;
191 if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor
)))
192 schedule_poll_timeout (poll_monitor
);
194 g_object_unref (poll_monitor
);
198 * g_poll_file_monitor_new:
201 * Polls @file for changes.
203 * Returns: a new #GFileMonitor for the given #GFile.
206 _g_poll_file_monitor_new (GFile
*file
)
208 GPollFileMonitor
* poll_monitor
;
210 poll_monitor
= g_object_new (G_TYPE_POLL_FILE_MONITOR
, NULL
);
212 poll_monitor
->file
= g_object_ref (file
);
214 g_file_query_info_async (file
, G_FILE_ATTRIBUTE_ETAG_VALUE
"," G_FILE_ATTRIBUTE_STANDARD_SIZE
,
215 0, 0, NULL
, got_initial_info
, g_object_ref (poll_monitor
));
217 return G_FILE_MONITOR (poll_monitor
);
221 g_poll_file_monitor_cancel (GFileMonitor
* monitor
)
223 GPollFileMonitor
*poll_monitor
= G_POLL_FILE_MONITOR (monitor
);
225 if (poll_monitor
->timeout
)
227 g_source_remove (poll_monitor
->timeout
);
228 poll_monitor
->timeout
= 0;