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"
27 #include "gfilemonitor.h"
29 static gboolean
g_poll_file_monitor_cancel (GFileMonitor
* monitor
);
30 static void schedule_poll_timeout (GPollFileMonitor
* poll_monitor
);
32 struct _GPollFileMonitor
34 GFileMonitor parent_instance
;
40 #define POLL_TIME_SECS 5
42 G_DEFINE_TYPE (GPollFileMonitor
, g_poll_file_monitor
, G_TYPE_FILE_MONITOR
)
45 g_poll_file_monitor_finalize (GObject
* object
)
47 GPollFileMonitor
* poll_monitor
;
49 poll_monitor
= G_POLL_FILE_MONITOR (object
);
51 g_object_unref (poll_monitor
->file
);
53 if (G_OBJECT_CLASS (g_poll_file_monitor_parent_class
)->finalize
)
54 (*G_OBJECT_CLASS (g_poll_file_monitor_parent_class
)->finalize
) (object
);
59 g_poll_file_monitor_class_init (GPollFileMonitorClass
* klass
)
61 GObjectClass
* gobject_class
= G_OBJECT_CLASS (klass
);
62 GFileMonitorClass
*file_monitor_class
= G_FILE_MONITOR_CLASS (klass
);
64 gobject_class
->finalize
= g_poll_file_monitor_finalize
;
66 file_monitor_class
->cancel
= g_poll_file_monitor_cancel
;
70 g_poll_file_monitor_init (GPollFileMonitor
* poll_monitor
)
75 safe_strcmp (const char *a
, const char *b
)
77 if (a
== NULL
&& b
== NULL
)
88 calc_event_type (GFileInfo
*last
,
91 if (last
== NULL
&& new == NULL
)
94 if (last
== NULL
&& new != NULL
)
95 return G_FILE_MONITOR_EVENT_CREATED
;
97 if (last
!= NULL
&& new == NULL
)
98 return G_FILE_MONITOR_EVENT_DELETED
;
100 if (safe_strcmp (g_file_info_get_etag (last
),
101 g_file_info_get_etag (new)))
102 return G_FILE_MONITOR_EVENT_CHANGED
;
104 if (g_file_info_get_size (last
) !=
105 g_file_info_get_size (new))
106 return G_FILE_MONITOR_EVENT_CHANGED
;
112 got_new_info (GObject
*source_object
,
116 GPollFileMonitor
* poll_monitor
= user_data
;
120 info
= g_file_query_info_finish (poll_monitor
->file
, res
, NULL
);
122 if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor
)))
124 event
= calc_event_type (poll_monitor
->last_info
, info
);
128 g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor
),
131 /* We're polling so slowly anyway, so always emit the done hint */
132 if (event
== G_FILE_MONITOR_EVENT_CHANGED
)
133 g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor
),
135 NULL
, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT
);
138 if (poll_monitor
->last_info
)
140 g_object_unref (poll_monitor
->last_info
);
141 poll_monitor
->last_info
= NULL
;
145 poll_monitor
->last_info
= g_object_ref (info
);
147 schedule_poll_timeout (poll_monitor
);
151 g_object_unref (info
);
153 g_object_unref (poll_monitor
);
157 poll_file_timeout (gpointer data
)
159 GPollFileMonitor
* poll_monitor
= data
;
161 poll_monitor
->timeout
= FALSE
;
163 g_file_query_info_async (poll_monitor
->file
, G_FILE_ATTRIBUTE_ETAG_VALUE
"," G_FILE_ATTRIBUTE_STD_SIZE
,
164 0, 0, NULL
, got_new_info
, g_object_ref (poll_monitor
));
170 schedule_poll_timeout (GPollFileMonitor
* poll_monitor
)
172 poll_monitor
->timeout
= g_timeout_add_seconds (POLL_TIME_SECS
, poll_file_timeout
, poll_monitor
);
176 got_initial_info (GObject
*source_object
,
180 GPollFileMonitor
* poll_monitor
= user_data
;
183 info
= g_file_query_info_finish (poll_monitor
->file
, res
, NULL
);
185 poll_monitor
->last_info
= info
;
187 if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor
)))
188 schedule_poll_timeout (poll_monitor
);
190 g_object_unref (poll_monitor
);
194 * g_poll_file_monitor_new:
197 * Returns a new #GFileMonitor for the given #GFile.
200 g_poll_file_monitor_new (GFile
*file
)
202 GPollFileMonitor
* poll_monitor
;
204 poll_monitor
= g_object_new (G_TYPE_POLL_FILE_MONITOR
, NULL
);
206 poll_monitor
->file
= g_object_ref (file
);
208 g_file_query_info_async (file
, G_FILE_ATTRIBUTE_ETAG_VALUE
"," G_FILE_ATTRIBUTE_STD_SIZE
,
209 0, 0, NULL
, got_initial_info
, g_object_ref (poll_monitor
));
211 return G_FILE_MONITOR (poll_monitor
);
215 g_poll_file_monitor_cancel (GFileMonitor
* monitor
)
217 GPollFileMonitor
*poll_monitor
= G_POLL_FILE_MONITOR (monitor
);
219 if (poll_monitor
->timeout
)
221 g_source_remove (poll_monitor
->timeout
);
222 poll_monitor
->timeout
= 0;