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wayland: Add wayland MetaSelectionSource implementation

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This object represents a Wayland selection owner. In order to invert the
FD direction (we hand an output fd, but want an inpu fd), create an
intermediate pipe so we can then create a GInputStream on top of it.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/320
This commit is contained in:
Carlos Garnacho 2018-11-19 17:34:18 +01:00
parent c95db7c542
commit 09aa82db49
3 changed files with 210 additions and 0 deletions
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2
src/meson.build
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@ -454,6 +454,8 @@ if have_wayland
'wayland/meta-pointer-confinement-wayland.h', 'wayland/meta-pointer-confinement-wayland.h',
'wayland/meta-pointer-lock-wayland.c', 'wayland/meta-pointer-lock-wayland.c',
'wayland/meta-pointer-lock-wayland.h', 'wayland/meta-pointer-lock-wayland.h',
'wayland/meta-selection-source-wayland.c',
'wayland/meta-selection-source-wayland-private.h',
'wayland/meta-wayland-actor-surface.c', 'wayland/meta-wayland-actor-surface.c',
'wayland/meta-wayland-actor-surface.h', 'wayland/meta-wayland-actor-surface.h',
'wayland/meta-wayland-buffer.c', 'wayland/meta-wayland-buffer.c',

46
src/wayland/meta-selection-source-wayland-private.h Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (C) 2018 Red Hat
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
#ifndef META_SELECTION_SOURCE_WAYLAND_H
#define META_SELECTION_SOURCE_WAYLAND_H
#include <wayland-server.h>
#include "core/meta-selection-source.h"
#define META_TYPE_SELECTION_SOURCE_WAYLAND (meta_selection_source_wayland_get_type ())
G_DECLARE_FINAL_TYPE (MetaSelectionSourceWayland,
meta_selection_source_wayland,
META, SELECTION_SOURCE_WAYLAND,
MetaSelectionSource)
typedef void (* MetaWaylandSendFunc) (struct wl_resource *resource,
const char *mimetype,
int fd);
typedef void (* MetaWaylandCancelFunc) (struct wl_resource *resource);
MetaSelectionSource * meta_selection_source_wayland_new (struct wl_resource *resource,
GList *mime_types,
MetaWaylandSendFunc send_func,
MetaWaylandCancelFunc cancel_func);
#endif /* META_SELECTION_SOURCE_WAYLAND_H */

162
src/wayland/meta-selection-source-wayland.c Normal file
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@ -0,0 +1,162 @@
/*
* Copyright (C) 2018 Red Hat
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
#include "config.h"
#include <glib-unix.h>
#include <gio/gunixinputstream.h>
#include "wayland/meta-selection-source-wayland-private.h"
struct _MetaSelectionSourceWayland
{
MetaSelectionSource parent_instance;
GList *mimetypes;
MetaWaylandSendFunc send_func;
MetaWaylandCancelFunc cancel_func;
struct wl_resource *resource;
};
G_DEFINE_TYPE (MetaSelectionSourceWayland, meta_selection_source_wayland,
META_TYPE_SELECTION_SOURCE)
static void
meta_selection_source_wayland_finalize (GObject *object)
{
MetaSelectionSourceWayland *source_wayland = META_SELECTION_SOURCE_WAYLAND (object);
g_list_free_full (source_wayland->mimetypes, g_free);
G_OBJECT_CLASS (meta_selection_source_wayland_parent_class)->finalize (object);
}
static void
meta_selection_source_wayland_read_async (MetaSelectionSource *source,
const gchar *mimetype,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
MetaSelectionSourceWayland *source_wayland = META_SELECTION_SOURCE_WAYLAND (source);
GInputStream *stream;
GTask *task;
int pipe_fds[2];
if (!g_unix_open_pipe (pipe_fds, FD_CLOEXEC, NULL))
{
g_task_report_new_error (source, callback, user_data,
meta_selection_source_wayland_read_async,
G_IO_ERROR, G_IO_ERROR_FAILED,
"Could not open pipe to read wayland selection");
return;
}
if (!g_unix_set_fd_nonblocking (pipe_fds[0], TRUE, NULL) ||
!g_unix_set_fd_nonblocking (pipe_fds[1], TRUE, NULL))
{
g_task_report_new_error (source, callback, user_data,
meta_selection_source_wayland_read_async,
G_IO_ERROR, G_IO_ERROR_FAILED,
"Could not make pipe nonblocking");
close (pipe_fds[0]);
close (pipe_fds[1]);
return;
}
task = g_task_new (source, cancellable, callback, user_data);
g_task_set_source_tag (task, meta_selection_source_wayland_read_async);
stream = g_unix_input_stream_new (pipe_fds[0], TRUE);
source_wayland->send_func (source_wayland->resource, mimetype, pipe_fds[1]);
close (pipe_fds[1]);
g_task_return_pointer (task, stream, g_object_unref);
g_object_unref (task);
}
static GInputStream *
meta_selection_source_wayland_read_finish (MetaSelectionSource *source,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, source), FALSE);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
meta_selection_source_wayland_read_async, FALSE);
return g_task_propagate_pointer (G_TASK (result), error);
}
static GList *
meta_selection_source_wayland_get_mimetypes (MetaSelectionSource *source)
{
MetaSelectionSourceWayland *source_wayland = META_SELECTION_SOURCE_WAYLAND (source);
return g_list_copy_deep (source_wayland->mimetypes,
(GCopyFunc) g_strdup, NULL);
}
static void
meta_selection_source_wayland_deactivated (MetaSelectionSource *source)
{
MetaSelectionSourceWayland *source_wayland =
META_SELECTION_SOURCE_WAYLAND (source);
source_wayland->cancel_func (source_wayland->resource);
META_SELECTION_SOURCE_CLASS (meta_selection_source_wayland_parent_class)->deactivated (source);
}
static void
meta_selection_source_wayland_class_init (MetaSelectionSourceWaylandClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
MetaSelectionSourceClass *source_class = META_SELECTION_SOURCE_CLASS (klass);
object_class->finalize = meta_selection_source_wayland_finalize;
source_class->deactivated = meta_selection_source_wayland_deactivated;
source_class->read_async = meta_selection_source_wayland_read_async;
source_class->read_finish = meta_selection_source_wayland_read_finish;
source_class->get_mimetypes = meta_selection_source_wayland_get_mimetypes;
}
static void
meta_selection_source_wayland_init (MetaSelectionSourceWayland *source)
{
}
MetaSelectionSource *
meta_selection_source_wayland_new (struct wl_resource *resource,
GList *mime_types,
MetaWaylandSendFunc send_func,
MetaWaylandCancelFunc cancel_func)
{
MetaSelectionSourceWayland *source_wayland;
source_wayland = g_object_new (META_TYPE_SELECTION_SOURCE_WAYLAND, NULL);
source_wayland->mimetypes = g_list_copy_deep (mime_types,
(GCopyFunc) g_strdup, NULL);
source_wayland->send_func = send_func;
source_wayland->cancel_func = cancel_func;
source_wayland->resource = resource;
return META_SELECTION_SOURCE (source_wayland);
}