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Learning_GTK4_tree/gdk/wayland/gdkdrop-wayland.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 "gdkprivate-wayland.h"
#include "gdkcontentformats.h"
#include "gdkdisplay-wayland.h"
#include <glib/gi18n-lib.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,
GdkDragAction preferred)
{
GdkDisplay *display;
display = gdk_drop_get_display (GDK_DROP (wayland_drop));
if (wl_data_device_manager_get_version (GDK_WAYLAND_DISPLAY (display)->data_device_manager) >=
WL_DATA_OFFER_SET_ACTIONS_SINCE_VERSION)
{
uint32_t dnd_actions;
uint32_t preferred_action;
dnd_actions = gdk_to_wl_actions (actions);
preferred_action = gdk_to_wl_actions (preferred);
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,
GdkDragAction preferred)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
gdk_wayland_drop_commit_status (wayland_drop, actions, preferred);
}
static void
gdk_wayland_drop_finish (GdkDrop *drop,
GdkDragAction action)
{
GdkWaylandDrop *wayland_drop = GDK_WAYLAND_DROP (drop);
GdkDisplay *display = gdk_drop_get_display (drop);
if (action)
{
gdk_wayland_drop_commit_status (wayland_drop, action, action);
if (wl_data_device_manager_get_version (GDK_WAYLAND_DISPLAY (display)->data_device_manager) >=
WL_DATA_OFFER_FINISH_SINCE_VERSION)
wl_data_offer_finish (wayland_drop->offer);
}
g_clear_pointer (&wayland_drop->offer, wl_data_offer_destroy);
}
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);
if (GDK_DISPLAY_DEBUG_CHECK (gdk_drop_get_display (drop), DND))
{
char *s = gdk_content_formats_to_string (formats);
gdk_debug_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, O_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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