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nautilus/SOURCES/window-slot-dnd-Stop-queuei...

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From 095d88295e6a7a5fefdcb58e1483ae3926b8cb1c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ant=C3=B3nio=20Fernandes?= <antoniof@gnome.org>
Date: Fri, 16 Jul 2021 22:32:41 +0100
Subject: [PATCH] window-slot-dnd: Stop queueing data requests
Each time ::drag-motion is emitted, we call gtk_drag_get_data() if we
don't have data yet.
If the drag source doesn't provide the data right away, we can end up
calling gtk_drag_get_data() multiple times. Later, when the data is
retrieved, we get multiple ::drag-data-received emissions.
Not only is this wasteful, it also breaks an assertion, causing crashes.
Instead, make sure gtk_drag_get_data() is called only once.
Fixes https://gitlab.gnome.org/GNOME/nautilus/-/issues/1535
---
src/nautilus-window-slot-dnd.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/src/nautilus-window-slot-dnd.c b/src/nautilus-window-slot-dnd.c
index 96c5d9cc8..9509d2c97 100644
--- a/src/nautilus-window-slot-dnd.c
+++ b/src/nautilus-window-slot-dnd.c
@@ -32,6 +32,7 @@
typedef struct
{
+ gboolean waiting_for_data;
gboolean have_data;
gboolean have_valid_data;
@@ -181,7 +182,7 @@ slot_proxy_drag_motion (GtkWidget *widget,
window = gtk_widget_get_toplevel (widget);
g_assert (NAUTILUS_IS_WINDOW (window));
- if (!drag_info->have_data)
+ if (!drag_info->have_data && !drag_info->waiting_for_data)
{
target = gtk_drag_dest_find_target (widget, context, NULL);
@@ -190,6 +191,7 @@ slot_proxy_drag_motion (GtkWidget *widget,
goto out;
}
+ drag_info->waiting_for_data = TRUE;
gtk_drag_get_data (widget, context, target, time);
}
@@ -353,8 +355,12 @@ slot_proxy_drag_drop (GtkWidget *widget,
drag_info->drop_occurred = TRUE;
- target = gtk_drag_dest_find_target (widget, context, NULL);
- gtk_drag_get_data (widget, context, target, time);
+ if (!drag_info->waiting_for_data)
+ {
+ target = gtk_drag_dest_find_target (widget, context, NULL);
+ drag_info->waiting_for_data = TRUE;
+ gtk_drag_get_data (widget, context, target, time);
+ }
return TRUE;
}
@@ -469,6 +475,7 @@ slot_proxy_drag_data_received (GtkWidget *widget,
drag_info->have_data = TRUE;
drag_info->info = info;
+ drag_info->waiting_for_data = FALSE;
if (gtk_selection_data_get_length (data) < 0)
{
--
2.41.0