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gtk2/gdk/wayland/gdkdrop-wayland.c
Benjamin Otte 46bbb397e1 wayland: Use a magic mime type for local DND 
Otherwise the compositor gets all confused when it's trying to make
drag happen but we know it's not going to happen.

After all, we exchange data behind its back, we just need to keep it
informed.
2020-02-15 22:33:57 +01:00

329 lines
9.9 KiB
C
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/*
* Copyright © 2010 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdkdropprivate.h"
#include "gdkinternals.h"
#include "gdkproperty.h"
#include "gdkprivate-wayland.h"
#include "gdkcontentformats.h"
#include "gdkdisplay-wayland.h"
#include "gdkintl.h"
#include "gdkseat-wayland.h"
#include "gdkdeviceprivate.h"
#include <glib-unix.h>
#include <gio/gunixinputstream.h>
#include <gio/gunixoutputstream.h>
#include <string.h>
#define GDK_TYPE_WAYLAND_DROP (gdk_wayland_drop_get_type ())
#define GDK_WAYLAND_DROP(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_WAYLAND_DROP, GdkWaylandDrop))
#define GDK_WAYLAND_DROP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WAYLAND_DROP, GdkWaylandDropClass))
#define GDK_IS_WAYLAND_DROP(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_WAYLAND_DROP))
#define GDK_IS_WAYLAND_DROP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WAYLAND_DROP))
#define GDK_WAYLAND_DROP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WAYLAND_DROP, GdkWaylandDropClass))
typedef struct _GdkWaylandDrop GdkWaylandDrop;
typedef struct _GdkWaylandDropClass GdkWaylandDropClass;
struct _GdkWaylandDrop
{
GdkDrop drop;
struct wl_data_offer *offer;
uint32_t source_actions;
uint32_t action;
uint32_t serial;
};
struct _GdkWaylandDropClass
{
GdkDropClass parent_class;
};
GType gdk_wayland_drop_get_type (void);
G_DEFINE_TYPE (GdkWaylandDrop, gdk_wayland_drop, GDK_TYPE_DROP)
static void
gdk_wayland_drop_finalize (GObject *object)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (object);
g_clear_pointer (&wayland_drop->offer, wl_data_offer_destroy);
G_OBJECT_CLASS (gdk_wayland_drop_parent_class)->finalize (object);
}
static inline uint32_t
gdk_to_wl_actions (GdkDragAction action)
{
uint32_t dnd_actions = 0;
if (action & (GDK_ACTION_COPY | GDK_ACTION_LINK))
dnd_actions |= WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
if (action & GDK_ACTION_MOVE)
dnd_actions |= WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
if (action & GDK_ACTION_ASK)
dnd_actions |= WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK;
return dnd_actions;
}
static void
gdk_wayland_drop_drop_set_status (GdkWaylandDrop *drop_wayland,
gboolean accepted)
{
if (accepted)
{
const char *const *mimetypes;
gsize i, n_mimetypes;
/* This is a local drag, treat it like that */
if (gdk_drop_get_drag (GDK_DROP (drop_wayland)))
{
wl_data_offer_accept (drop_wayland->offer, drop_wayland->serial, GDK_WAYLAND_LOCAL_DND_MIME_TYPE);
return;
}
mimetypes = gdk_content_formats_get_mime_types (gdk_drop_get_formats (GDK_DROP (drop_wayland)), &n_mimetypes);
for (i = 0; i < n_mimetypes; i++)
{
if (mimetypes[i] != g_intern_static_string ("DELETE"))
break;
}
if (i < n_mimetypes)
{
wl_data_offer_accept (drop_wayland->offer, drop_wayland->serial, mimetypes[i]);
return;
}
}
wl_data_offer_accept (drop_wayland->offer, drop_wayland->serial, NULL);
}
static void
gdk_wayland_drop_commit_status (GdkWaylandDrop *wayland_drop,
GdkDragAction actions)
{
GdkDisplay *display;
display = gdk_drop_get_display (GDK_DROP (wayland_drop));
if (GDK_WAYLAND_DISPLAY (display)->data_device_manager_version >=
WL_DATA_OFFER_SET_ACTIONS_SINCE_VERSION)
{
uint32_t dnd_actions;
uint32_t preferred_action;
dnd_actions = gdk_to_wl_actions (actions);
if (dnd_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY)
preferred_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
else if (dnd_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE)
preferred_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
else if (dnd_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK)
preferred_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK;
else
preferred_action = 0;
wl_data_offer_set_actions (wayland_drop->offer, dnd_actions, preferred_action);
}
gdk_wayland_drop_drop_set_status (wayland_drop, actions != 0);
}
static void
gdk_wayland_drop_status (GdkDrop *drop,
GdkDragAction actions)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
gdk_wayland_drop_commit_status (wayland_drop, actions);
}
static void
gdk_wayland_drop_finish (GdkDrop *drop,
GdkDragAction action)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
GdkDisplay *display = gdk_drop_get_display (drop);
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
if (action)
{
gdk_wayland_drop_commit_status (wayland_drop, action);
if (display_wayland->data_device_manager_version >=
WL_DATA_OFFER_FINISH_SINCE_VERSION)
wl_data_offer_finish (wayland_drop->offer);
}
}
static void
gdk_wayland_drop_read_async (GdkDrop *drop,
GdkContentFormats *formats,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
GInputStream *stream;
const char *mime_type;
int pipe_fd[2];
GError *error = NULL;
GTask *task;
task = g_task_new (drop, cancellable, callback, user_data);
g_task_set_priority (task, io_priority);
g_task_set_source_tag (task, gdk_wayland_drop_read_async);
GDK_DISPLAY_NOTE (gdk_drop_get_display (drop), DND, char *s = gdk_content_formats_to_string (formats);
g_message ("%p: read for %s", drop, s);
g_free (s); );
mime_type = gdk_content_formats_match_mime_type (formats,
gdk_drop_get_formats (drop));
if (mime_type == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("No compatible transfer format found"));
return;
}
g_task_set_task_data (task, (gpointer) mime_type, NULL);
if (!g_unix_open_pipe (pipe_fd, FD_CLOEXEC, &error))
{
g_task_return_error (task, error);
return;
}
wl_data_offer_receive (wayland_drop->offer, mime_type, pipe_fd[1]);
stream = g_unix_input_stream_new (pipe_fd[0], TRUE);
close (pipe_fd[1]);
g_task_return_pointer (task, stream, g_object_unref);
}
static GInputStream *
gdk_wayland_drop_read_finish (GdkDrop *drop,
GAsyncResult *result,
const char **out_mime_type,
GError **error)
{
GTask *task;
g_return_val_if_fail (g_task_is_valid (result, G_OBJECT (drop)), NULL);
task = G_TASK (result);
g_return_val_if_fail (g_task_get_source_tag (task) == gdk_wayland_drop_read_async, NULL);
if (out_mime_type)
*out_mime_type = g_task_get_task_data (task);
return g_task_propagate_pointer (task, error);
}
static void
gdk_wayland_drop_class_init (GdkWaylandDropClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDropClass *drop_class = GDK_DROP_CLASS (klass);
object_class->finalize = gdk_wayland_drop_finalize;
drop_class->status = gdk_wayland_drop_status;
drop_class->finish = gdk_wayland_drop_finish;
drop_class->read_async = gdk_wayland_drop_read_async;
drop_class->read_finish = gdk_wayland_drop_read_finish;
}
static void
gdk_wayland_drop_init (GdkWaylandDrop *drop)
{
}
GdkDrop *
gdk_wayland_drop_new (GdkDevice *device,
GdkDrag *drag,
GdkContentFormats *formats,
GdkSurface *surface,
struct wl_data_offer *offer,
uint32_t serial)
{
GdkWaylandDrop *drop;
drop = g_object_new (GDK_TYPE_WAYLAND_DROP,
"device", device,
"drag", drag,
"formats", formats,
"surface", surface,
NULL);
drop->offer = offer;
drop->serial = serial;
return GDK_DROP (drop);
}
static void
gdk_wayland_drop_update_actions (GdkWaylandDrop *drop)
{
GdkDragAction gdk_actions = 0;
uint32_t wl_actions;
if (drop->action == 0 ||
drop->action & WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK)
wl_actions = drop->source_actions;
else
wl_actions = drop->action;
if (wl_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY)
gdk_actions |= GDK_ACTION_COPY;
if (wl_actions & WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE)
gdk_actions |= GDK_ACTION_MOVE;
gdk_drop_set_actions (GDK_DROP (drop), gdk_actions);
}
void
gdk_wayland_drop_set_source_actions (GdkDrop *drop,
uint32_t source_actions)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
wayland_drop->source_actions = source_actions;
gdk_wayland_drop_update_actions (wayland_drop);
}
void
gdk_wayland_drop_set_action (GdkDrop *drop,
uint32_t action)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
wayland_drop->action = action;
gdk_wayland_drop_update_actions (wayland_drop);
}
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