forked from AuroraMiddleware/gtk
286 lines
7.5 KiB
C
286 lines
7.5 KiB
C
/* GTK - The GIMP Toolkit
|
|
* gtktrashmonitor.h: Monitor the trash:/// folder to see if there is trash or not
|
|
* Copyright (C) 2011 Suse
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as
|
|
* published by the Free Software Foundation; either version 2.1 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Authors: Federico Mena Quintero <federico@gnome.org>
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include "gtkintl.h"
|
|
#include "gtkmarshalers.h"
|
|
#include "gtktrashmonitor.h"
|
|
|
|
#define UPDATE_RATE_SECONDS 1
|
|
|
|
struct _GtkTrashMonitor
|
|
{
|
|
GObject parent;
|
|
|
|
GFileMonitor *file_monitor;
|
|
gulong file_monitor_changed_id;
|
|
|
|
gboolean pending;
|
|
int timeout_id;
|
|
|
|
guint has_trash : 1;
|
|
};
|
|
|
|
struct _GtkTrashMonitorClass
|
|
{
|
|
GObjectClass parent_class;
|
|
|
|
void (* trash_state_changed) (GtkTrashMonitor *monitor);
|
|
};
|
|
|
|
enum {
|
|
TRASH_STATE_CHANGED,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
static guint signals[LAST_SIGNAL];
|
|
|
|
G_DEFINE_TYPE (GtkTrashMonitor, _gtk_trash_monitor, G_TYPE_OBJECT)
|
|
|
|
static GtkTrashMonitor *the_trash_monitor;
|
|
|
|
#define ICON_NAME_TRASH_EMPTY "user-trash-symbolic"
|
|
#define ICON_NAME_TRASH_FULL "user-trash-full-symbolic"
|
|
|
|
static void
|
|
gtk_trash_monitor_dispose (GObject *object)
|
|
{
|
|
GtkTrashMonitor *monitor;
|
|
|
|
monitor = GTK_TRASH_MONITOR (object);
|
|
|
|
if (monitor->file_monitor)
|
|
{
|
|
g_signal_handler_disconnect (monitor->file_monitor, monitor->file_monitor_changed_id);
|
|
monitor->file_monitor_changed_id = 0;
|
|
|
|
g_clear_object (&monitor->file_monitor);
|
|
}
|
|
|
|
if (monitor->timeout_id > 0)
|
|
g_source_remove (monitor->timeout_id);
|
|
monitor->timeout_id = 0;
|
|
|
|
G_OBJECT_CLASS (_gtk_trash_monitor_parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
_gtk_trash_monitor_class_init (GtkTrashMonitorClass *class)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
|
|
gobject_class = (GObjectClass *) class;
|
|
|
|
gobject_class->dispose = gtk_trash_monitor_dispose;
|
|
|
|
signals[TRASH_STATE_CHANGED] =
|
|
g_signal_new (I_("trash-state-changed"),
|
|
G_OBJECT_CLASS_TYPE (gobject_class),
|
|
G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (GtkTrashMonitorClass, trash_state_changed),
|
|
NULL, NULL,
|
|
NULL,
|
|
G_TYPE_NONE, 0);
|
|
}
|
|
|
|
/* Updates the internal has_trash flag and emits the "trash-state-changed" signal */
|
|
static void
|
|
update_has_trash_and_notify (GtkTrashMonitor *monitor,
|
|
gboolean has_trash)
|
|
{
|
|
if (monitor->has_trash == !!has_trash)
|
|
return;
|
|
|
|
monitor->has_trash = !!has_trash;
|
|
|
|
g_signal_emit (monitor, signals[TRASH_STATE_CHANGED], 0);
|
|
}
|
|
|
|
/* Use G_FILE_ATTRIBUTE_TRASH_ITEM_COUNT since we only want to know whether the
|
|
* trash is empty or not, not access its children. This is available for the
|
|
* trash backend since it uses a cache. In this way we prevent flooding the
|
|
* trash backend with enumeration requests when trashing > 1000 files
|
|
*/
|
|
static void
|
|
trash_query_info_cb (GObject *source,
|
|
GAsyncResult *result,
|
|
gpointer user_data)
|
|
{
|
|
GtkTrashMonitor *monitor = GTK_TRASH_MONITOR (user_data);
|
|
GFileInfo *info;
|
|
guint32 item_count;
|
|
gboolean has_trash = FALSE;
|
|
|
|
info = g_file_query_info_finish (G_FILE (source), result, NULL);
|
|
|
|
if (info != NULL)
|
|
{
|
|
item_count = g_file_info_get_attribute_uint32 (info,
|
|
G_FILE_ATTRIBUTE_TRASH_ITEM_COUNT);
|
|
has_trash = item_count > 0;
|
|
|
|
g_object_unref (info);
|
|
}
|
|
|
|
update_has_trash_and_notify (monitor, has_trash);
|
|
|
|
g_object_unref (monitor); /* was reffed in recompute_trash_state() */
|
|
}
|
|
|
|
static void recompute_trash_state (GtkTrashMonitor *monitor);
|
|
|
|
static gboolean
|
|
recompute_trash_state_cb (gpointer data)
|
|
{
|
|
GtkTrashMonitor *monitor = data;
|
|
|
|
monitor->timeout_id = 0;
|
|
if (monitor->pending)
|
|
{
|
|
monitor->pending = FALSE;
|
|
recompute_trash_state (monitor);
|
|
}
|
|
|
|
return G_SOURCE_REMOVE;
|
|
}
|
|
|
|
/* Asynchronously recomputes whether there is trash or not */
|
|
static void
|
|
recompute_trash_state (GtkTrashMonitor *monitor)
|
|
{
|
|
GFile *file;
|
|
|
|
/* Rate limit the updates to not flood the gvfsd-trash when too many changes
|
|
* happened in a short time.
|
|
*/
|
|
if (monitor->timeout_id > 0)
|
|
{
|
|
monitor->pending = TRUE;
|
|
return;
|
|
}
|
|
|
|
file = g_file_new_for_uri ("trash:///");
|
|
g_file_query_info_async (file,
|
|
G_FILE_ATTRIBUTE_TRASH_ITEM_COUNT,
|
|
G_FILE_QUERY_INFO_NONE,
|
|
G_PRIORITY_DEFAULT, NULL,
|
|
trash_query_info_cb, g_object_ref (monitor));
|
|
|
|
monitor->timeout_id = g_timeout_add_seconds (UPDATE_RATE_SECONDS,
|
|
recompute_trash_state_cb,
|
|
monitor);
|
|
|
|
g_object_unref (file);
|
|
}
|
|
|
|
/* Callback used when the "trash:///" file monitor changes; we just recompute the trash state
|
|
* whenever something happens.
|
|
*/
|
|
static void
|
|
file_monitor_changed_cb (GFileMonitor *file_monitor,
|
|
GFile *child,
|
|
GFile *other_file,
|
|
GFileMonitorEvent event_type,
|
|
GtkTrashMonitor *monitor)
|
|
{
|
|
recompute_trash_state (monitor);
|
|
}
|
|
|
|
static void
|
|
_gtk_trash_monitor_init (GtkTrashMonitor *monitor)
|
|
{
|
|
GFile *file;
|
|
|
|
file = g_file_new_for_uri ("trash:///");
|
|
|
|
monitor->file_monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, NULL);
|
|
monitor->pending = FALSE;
|
|
monitor->timeout_id = 0;
|
|
|
|
g_object_unref (file);
|
|
|
|
if (monitor->file_monitor)
|
|
monitor->file_monitor_changed_id = g_signal_connect (monitor->file_monitor, "changed",
|
|
G_CALLBACK (file_monitor_changed_cb), monitor);
|
|
|
|
recompute_trash_state (monitor);
|
|
}
|
|
|
|
/*
|
|
* _gtk_trash_monitor_get:
|
|
*
|
|
* Returns: (transfer full): a new reference to the singleton
|
|
* GtkTrashMonitor object. Be sure to call g_object_unref() on it when you are
|
|
* done with the trash monitor.
|
|
*/
|
|
GtkTrashMonitor *
|
|
_gtk_trash_monitor_get (void)
|
|
{
|
|
if (the_trash_monitor != NULL)
|
|
{
|
|
g_object_ref (the_trash_monitor);
|
|
}
|
|
else
|
|
{
|
|
the_trash_monitor = g_object_new (GTK_TYPE_TRASH_MONITOR, NULL);
|
|
g_object_add_weak_pointer (G_OBJECT (the_trash_monitor), (gpointer *) &the_trash_monitor);
|
|
}
|
|
|
|
return the_trash_monitor;
|
|
}
|
|
|
|
/*
|
|
* _gtk_trash_monitor_get_icon:
|
|
* @monitor: a GtkTrashMonitor
|
|
*
|
|
* Returns: (transfer full): the GIcon that should be used to represent
|
|
* the state of the trash folder on screen, based on whether there is trash or
|
|
* not.
|
|
*/
|
|
GIcon *
|
|
_gtk_trash_monitor_get_icon (GtkTrashMonitor *monitor)
|
|
{
|
|
const char *icon_name;
|
|
|
|
g_return_val_if_fail (GTK_IS_TRASH_MONITOR (monitor), NULL);
|
|
|
|
if (monitor->has_trash)
|
|
icon_name = ICON_NAME_TRASH_FULL;
|
|
else
|
|
icon_name = ICON_NAME_TRASH_EMPTY;
|
|
|
|
return g_themed_icon_new (icon_name);
|
|
}
|
|
|
|
/*
|
|
* _gtk_trash_monitor_get_has_trash:
|
|
* @monitor: a GtkTrashMonitor
|
|
*
|
|
* Returns: #TRUE if there is trash in the trash:/// folder, or #FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
_gtk_trash_monitor_get_has_trash (GtkTrashMonitor *monitor)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_TRASH_MONITOR (monitor), FALSE);
|
|
|
|
return monitor->has_trash;
|
|
}
|