Adding upstream version 43.2.upstream/43.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 262 insertions, 0 deletions

diff --git a/src/nautilus-trash-monitor.c b/src/nautilus-trash-monitor.c
new file mode 100644
index 0000000..366116f
--- /dev/null
+++ b/src/nautilus-trash-monitor.c
@@ -0,0 +1,262 @@
+/*
+ *  nautilus-trash-monitor.c: Nautilus trash state watcher.
+ *
+ *  Copyright (C) 2000, 2001 Eazel, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License as
+ *  published by the Free Software Foundation; either version 2 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
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public
+ *  License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *  Author: Pavel Cisler <pavel@eazel.com>
+ */
+
+#include "nautilus-trash-monitor.h"
+
+#include <eel/eel-debug.h>
+
+#define UPDATE_RATE_SECONDS 1
+
+struct _NautilusTrashMonitor
+{
+    GObject object;
+
+    gboolean empty;
+    GFileMonitor *file_monitor;
+    gboolean pending;
+    gint timeout_id;
+};
+
+enum
+{
+    TRASH_STATE_CHANGED,
+    LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+static NautilusTrashMonitor *nautilus_trash_monitor = NULL;
+
+G_DEFINE_TYPE (NautilusTrashMonitor, nautilus_trash_monitor, G_TYPE_OBJECT)
+
+static void
+nautilus_trash_monitor_finalize (GObject *object)
+{
+    NautilusTrashMonitor *trash_monitor;
+
+    trash_monitor = NAUTILUS_TRASH_MONITOR (object);
+
+    if (trash_monitor->timeout_id > 0)
+    {
+        g_source_remove (trash_monitor->timeout_id);
+        trash_monitor->timeout_id = 0;
+    }
+
+    if (trash_monitor->file_monitor)
+    {
+        g_object_unref (trash_monitor->file_monitor);
+    }
+
+    G_OBJECT_CLASS (nautilus_trash_monitor_parent_class)->finalize (object);
+}
+
+static void
+nautilus_trash_monitor_class_init (NautilusTrashMonitorClass *klass)
+{
+    GObjectClass *object_class;
+
+    object_class = G_OBJECT_CLASS (klass);
+
+    object_class->finalize = nautilus_trash_monitor_finalize;
+
+    signals[TRASH_STATE_CHANGED] = g_signal_new
+                                       ("trash-state-changed",
+                                       G_TYPE_FROM_CLASS (object_class),
+                                       G_SIGNAL_RUN_LAST,
+                                       0,
+                                       NULL, NULL,
+                                       g_cclosure_marshal_VOID__BOOLEAN,
+                                       G_TYPE_NONE, 1,
+                                       G_TYPE_BOOLEAN);
+}
+
+static void
+update_empty_info (NautilusTrashMonitor *trash_monitor,
+                   gboolean              is_empty)
+{
+    if (trash_monitor->empty == is_empty)
+    {
+        return;
+    }
+
+    trash_monitor->empty = is_empty;
+
+    /* trash got empty or full, notify everyone who cares */
+    g_signal_emit (trash_monitor,
+                   signals[TRASH_STATE_CHANGED], 0,
+                   trash_monitor->empty);
+}
+
+/* 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 *res,
+                     gpointer      user_data)
+{
+    NautilusTrashMonitor *trash_monitor = user_data;
+    GFileInfo *info;
+    guint32 item_count;
+    gboolean is_empty = TRUE;
+
+    info = g_file_query_info_finish (G_FILE (source), res, NULL);
+
+    if (info != NULL)
+    {
+        item_count = g_file_info_get_attribute_uint32 (info,
+                                                       G_FILE_ATTRIBUTE_TRASH_ITEM_COUNT);
+        is_empty = item_count == 0;
+
+        g_object_unref (info);
+    }
+
+    update_empty_info (trash_monitor, is_empty);
+
+    g_object_unref (trash_monitor);
+}
+
+static void schedule_update_info (NautilusTrashMonitor *trash_monitor);
+
+static gboolean
+schedule_update_info_cb (gpointer data)
+{
+    NautilusTrashMonitor *trash_monitor = data;
+
+    trash_monitor->timeout_id = 0;
+    if (trash_monitor->pending)
+    {
+        trash_monitor->pending = FALSE;
+        schedule_update_info (trash_monitor);
+    }
+
+    return G_SOURCE_REMOVE;
+}
+
+static void
+schedule_update_info (NautilusTrashMonitor *trash_monitor)
+{
+    GFile *location;
+
+    /* Rate limit the updates to not flood the gvfsd-trash when too many changes
+     * happended in a short time.
+     */
+    if (trash_monitor->timeout_id > 0)
+    {
+        trash_monitor->pending = TRUE;
+        return;
+    }
+
+    location = g_file_new_for_uri ("trash:///");
+    g_file_query_info_async (location,
+                             G_FILE_ATTRIBUTE_TRASH_ITEM_COUNT,
+                             G_FILE_QUERY_INFO_NONE,
+                             G_PRIORITY_DEFAULT, NULL,
+                             trash_query_info_cb, g_object_ref (trash_monitor));
+
+    trash_monitor->timeout_id = g_timeout_add_seconds (UPDATE_RATE_SECONDS,
+                                                       schedule_update_info_cb,
+                                                       trash_monitor);
+    g_object_unref (location);
+}
+
+static void
+file_changed (GFileMonitor      *monitor,
+              GFile             *child,
+              GFile             *other_file,
+              GFileMonitorEvent  event_type,
+              gpointer           user_data)
+{
+    NautilusTrashMonitor *trash_monitor;
+
+    trash_monitor = NAUTILUS_TRASH_MONITOR (user_data);
+
+    schedule_update_info (trash_monitor);
+}
+
+static void
+nautilus_trash_monitor_init (NautilusTrashMonitor *trash_monitor)
+{
+    GFile *location;
+
+    trash_monitor->empty = TRUE;
+
+    location = g_file_new_for_uri ("trash:///");
+
+    trash_monitor->file_monitor = g_file_monitor_file (location, 0, NULL, NULL);
+    trash_monitor->pending = FALSE;
+    trash_monitor->timeout_id = 0;
+
+    g_signal_connect (trash_monitor->file_monitor, "changed",
+                      (GCallback) file_changed, trash_monitor);
+
+    g_object_unref (location);
+
+    schedule_update_info (trash_monitor);
+}
+
+static void
+clear_trash_monitor_on_shutdown (void)
+{
+    g_clear_object (&nautilus_trash_monitor);
+}
+
+NautilusTrashMonitor *
+nautilus_trash_monitor_get (void)
+{
+    if (nautilus_trash_monitor == NULL)
+    {
+        /* not running yet, start it up */
+
+        nautilus_trash_monitor = NAUTILUS_TRASH_MONITOR
+                                     (g_object_new (NAUTILUS_TYPE_TRASH_MONITOR, NULL));
+        eel_debug_call_at_shutdown (clear_trash_monitor_on_shutdown);
+    }
+
+    return nautilus_trash_monitor;
+}
+
+gboolean
+nautilus_trash_monitor_is_empty (void)
+{
+    NautilusTrashMonitor *monitor;
+
+    monitor = nautilus_trash_monitor_get ();
+    return monitor->empty;
+}
+
+GIcon *
+nautilus_trash_monitor_get_symbolic_icon (void)
+{
+    gboolean empty;
+
+    empty = nautilus_trash_monitor_is_empty ();
+
+    if (empty)
+    {
+        return g_themed_icon_new ("user-trash-symbolic");
+    }
+    else
+    {
+        return g_themed_icon_new ("user-trash-full-symbolic");
+    }
+}