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trash-monitor: Rate limit updates

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Trash monitor queries info from gvfsd-trash after each file monitor
change which can be problematic when too many changes happen in
a short time. Let's rate limit the number of queries...

Fixes: #1010
This commit is contained in:
Ondrej Holy 2020-05-21 21:14:47 -04:00 committed by Matthias Clasen
parent e9872d52d8
commit e8a120e5af
1 changed files with 55 additions and 14 deletions
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69
gtk/gtktrashmonitor.c
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@ -24,13 +24,18 @@
#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;
gint timeout_id;
guint has_trash : 1;
};
@ -70,6 +75,10 @@ gtk_trash_monitor_dispose (GObject *object)
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);
}
@ -84,18 +93,18 @@ _gtk_trash_monitor_class_init (GtkTrashMonitorClass *class)
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);
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)
gboolean has_trash)
{
if (monitor->has_trash == !!has_trash)
return;
@ -136,12 +145,38 @@ trash_query_info_cb (GObject *source,
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
* happended 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,
@ -149,6 +184,10 @@ recompute_trash_state (GtkTrashMonitor *monitor)
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);
}
@ -156,11 +195,11 @@ recompute_trash_state (GtkTrashMonitor *monitor)
* whenever something happens.
*/
static void
file_monitor_changed_cb (GFileMonitor *file_monitor,
GFile *child,
GFile *other_file,
GFileMonitorEvent event_type,
GtkTrashMonitor *monitor)
file_monitor_changed_cb (GFileMonitor *file_monitor,
GFile *child,
GFile *other_file,
GFileMonitorEvent event_type,
GtkTrashMonitor *monitor)
{
recompute_trash_state (monitor);
}
@ -173,12 +212,14 @@ _gtk_trash_monitor_init (GtkTrashMonitor *monitor)
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);
G_CALLBACK (file_monitor_changed_cb), monitor);
recompute_trash_state (monitor);
}