gio/fen/gfenfilemonitor.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* vim:set expandtab ts=4 shiftwidth=4: */
   3 /* GIO - GLib Input, Output and Streaming Library
   4  *
   5  * Copyright (C) 2006-2007 Red Hat, Inc.
   6  * Copyright (C) 2007 Sebastian Dröge.
   7  * Copyright (C) 2008 Sun Microsystems, Inc. All rights reserved.
   8  * Use is subject to license terms.
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General
  21  * Public License along with this library; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  23  * Boston, MA 02111-1307, USA.
  24  *
  25  * Authors: Alexander Larsson <alexl@redhat.com>
  26  *          John McCutchan <john@johnmccutchan.com>
  27  *          Sebastian Dröge <slomo@circular-chaos.org>
  28  *          Lin Ma <lin.ma@sun.com>
  29  */
  30
  31 #include "config.h"
  32
  33 #include "gfenfilemonitor.h"
  34 #include <gio/giomodule.h>
  35
  36 #include "fen-helper.h"
  37
  38 #include "gioalias.h"
  39
  40 struct _GFenFileMonitor
  41 {
  42     GLocalFileMonitor parent_instance;
  43     fen_sub* sub;
  44 };
  45
  46 static gboolean g_fen_file_monitor_cancel (GFileMonitor* monitor);
  47
  48 #define g_fen_file_monitor_get_type _g_fen_file_monitor_get_type
  49 G_DEFINE_TYPE_WITH_CODE (GFenFileMonitor, g_fen_file_monitor, G_TYPE_LOCAL_FILE_MONITOR,
  50   g_io_extension_point_implement (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
  51     g_define_type_id,
  52     "fen",
  53     20))
  54
  55 static void
  56 g_fen_file_monitor_finalize (GObject *object)
  57 {
  58         GFenFileMonitor *self = G_FEN_FILE_MONITOR (object);
  59
  60     if (self->sub) {
  61         _fen_remove (G_LOCAL_FILE_MONITOR (self)->filename, self->sub, FALSE);
  62         _fen_sub_delete (self->sub);
  63         self->sub = NULL;
  64     }
  65
  66     if (G_OBJECT_CLASS (g_fen_file_monitor_parent_class)->finalize)
  67         (*G_OBJECT_CLASS (g_fen_file_monitor_parent_class)->finalize) (object);
  68 }
  69
  70 static GObject *
  71 g_fen_file_monitor_constructor (GType type,
  72   guint n_construct_properties,
  73   GObjectConstructParam *construct_properties)
  74 {
  75     GObject *obj;
  76     GFenFileMonitorClass *klass;
  77     GObjectClass *parent_class;
  78     GFenFileMonitor *self;
  79     const gchar *filename = NULL;
  80
  81     klass = G_FEN_FILE_MONITOR_CLASS (g_type_class_peek (G_TYPE_FEN_FILE_MONITOR));
  82     parent_class = g_fen_file_monitor_parent_class;
  83     obj = parent_class->constructor (type,
  84       n_construct_properties,
  85       construct_properties);
  86
  87     self = G_FEN_FILE_MONITOR (obj);
  88
  89     filename = G_LOCAL_FILE_MONITOR (obj)->filename;
  90
  91     g_assert (filename != NULL);
  92
  93     /* Will never fail as is_supported() should be called before instanciating
  94      * anyway */
  95     if (!_fen_init ())
  96         g_assert_not_reached ();
  97
  98     /* FIXME: what to do about errors here? we can't return NULL or another
  99      * kind of error and an assertion is probably too hard */
 100     self->sub = _fen_sub_new (self, FALSE);
 101     g_assert (self->sub);
 102
 103     _fen_add (filename, self->sub, FALSE);
 104
 105     return obj;
 106 }
 107
 108 static gboolean
 109 g_fen_file_monitor_is_supported (void)
 110 {
 111         return _fen_init ();
 112 }
 113
 114 static void
 115 g_fen_file_monitor_class_init (GFenFileMonitorClass* klass)
 116 {
 117     GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
 118     GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
 119     GLocalFileMonitorClass *local_file_monitor_class = G_LOCAL_FILE_MONITOR_CLASS (klass);
 120
 121     gobject_class->finalize = g_fen_file_monitor_finalize;
 122     gobject_class->constructor = g_fen_file_monitor_constructor;
 123     file_monitor_class->cancel = g_fen_file_monitor_cancel;
 124
 125     local_file_monitor_class->is_supported = g_fen_file_monitor_is_supported;
 126 }
 127
 128 static void
 129 g_fen_file_monitor_init (GFenFileMonitor* monitor)
 130 {
 131 }
 132
 133 static gboolean
 134 g_fen_file_monitor_cancel (GFileMonitor* monitor)
 135 {
 136     GFenFileMonitor *self = G_FEN_FILE_MONITOR (monitor);
 137
 138     if (self->sub) {
 139         _fen_remove (G_LOCAL_FILE_MONITOR (self)->filename, self->sub, FALSE);
 140         _fen_sub_delete (self->sub);
 141         self->sub = NULL;
 142     }
 143
 144     if (G_FILE_MONITOR_CLASS (g_fen_file_monitor_parent_class)->cancel)
 145         (*G_FILE_MONITOR_CLASS (g_fen_file_monitor_parent_class)->cancel) (monitor);
 146
 147     return TRUE;
 148 }
 149