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mutter/src/wayland/meta-wayland-data-device.c
Carlos Garnacho 4bee25d8e6 wayland: Cancel selection data sources that are set while unfocused 
If a client is naive enough to assume that it can set the selection while
it has got no surfaces, mutter will simply ignore the request and leave
the selection unchanged.

This is good and the expected behavior, however the poor client that did
this will enter in an inconsistent state where it "claimed" the selection,
but nobody told it that the wl_data_source is not current.

So, when the client is focused the next time, it will receive wl_data_offers
as usual, but it will still think all the time that it is owning the
selection. In the case of GTK, that takes client-side shortcuts, so any
attempted paste will still bring back the client-side aborted selection.

To fix this, cancel the selection right away if it happened while unfocused,
the client will be able to undo its own failed selection, and not assume
that future offers are its own.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1469
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1772>
2021-03-23 17:07:31 +00:00

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/*
* Copyright © 2011 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/* The file is based on src/data-device.c from Weston */
#include "config.h"
#include "wayland/meta-wayland-data-device.h"
#include <gio/gunixoutputstream.h>
#include <glib-unix.h>
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "compositor/meta-dnd-actor-private.h"
#include "meta/meta-selection-source-memory.h"
#include "wayland/meta-selection-source-wayland-private.h"
#include "wayland/meta-wayland-dnd-surface.h"
#include "wayland/meta-wayland-pointer.h"
#include "wayland/meta-wayland-private.h"
#include "wayland/meta-wayland-seat.h"
#define ROOTWINDOW_DROP_MIME "application/x-rootwindow-drop"
static void unset_selection_source (MetaWaylandDataDevice *data_device,
MetaSelectionType selection_type);
static void
drag_grab_data_source_destroyed (gpointer data, GObject *where_the_object_was);
static struct wl_resource * create_and_send_clipboard_offer (MetaWaylandDataDevice *data_device,
struct wl_resource *target);
static void
move_resources (struct wl_list *destination,
struct wl_list *source)
{
wl_list_insert_list (destination, source);
wl_list_init (source);
}
static void
move_resources_for_client (struct wl_list *destination,
struct wl_list *source,
struct wl_client *client)
{
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe (resource, tmp, source)
{
if (wl_resource_get_client (resource) == client)
{
wl_list_remove (wl_resource_get_link (resource));
wl_list_insert (destination, wl_resource_get_link (resource));
}
}
}
static void
unbind_resource (struct wl_resource *resource)
{
wl_list_remove (wl_resource_get_link (resource));
}
static void
default_destructor (struct wl_client *client,
struct wl_resource *resource)
{
wl_resource_destroy (resource);
}
static struct wl_resource *
create_and_send_dnd_offer (MetaWaylandDataSource *source,
struct wl_resource *target)
{
MetaWaylandDataOffer *offer;
struct wl_array *mime_types;
struct wl_resource *resource;
char **p;
offer = meta_wayland_data_offer_new (META_SELECTION_DND, source, target);
resource = meta_wayland_data_offer_get_resource (offer);
wl_data_device_send_data_offer (target, resource);
mime_types = meta_wayland_data_source_get_mime_types (source);
wl_array_for_each (p, mime_types)
wl_data_offer_send_offer (resource, *p);
meta_wayland_data_offer_update_action (offer);
meta_wayland_data_source_set_current_offer (source, offer);
return resource;
}
struct _MetaWaylandDragGrab {
MetaWaylandPointerGrab generic;
MetaWaylandKeyboardGrab keyboard_grab;
MetaWaylandSeat *seat;
struct wl_client *drag_client;
MetaWaylandSurface *drag_focus;
gulong drag_focus_destroy_handler_id;
struct wl_resource *drag_focus_data_device;
struct wl_listener drag_focus_listener;
MetaWaylandSurface *drag_surface;
struct wl_listener drag_icon_listener;
MetaWaylandDataSource *drag_data_source;
ClutterActor *feedback_actor;
MetaWaylandSurface *drag_origin;
struct wl_listener drag_origin_listener;
int drag_start_x, drag_start_y;
ClutterModifierType buttons;
guint need_initial_focus : 1;
};
static void
set_selection_source (MetaWaylandDataDevice *data_device,
MetaSelectionType selection_type,
MetaSelectionSource *selection_source)
{
MetaDisplay *display = meta_get_display ();
meta_selection_set_owner (meta_display_get_selection (display),
selection_type, selection_source);
g_set_object (&data_device->owners[selection_type], selection_source);
}
static void
unset_selection_source (MetaWaylandDataDevice *data_device,
MetaSelectionType selection_type)
{
MetaDisplay *display = meta_get_display ();
if (!data_device->owners[selection_type])
return;
meta_selection_unset_owner (meta_display_get_selection (display),
selection_type,
data_device->owners[selection_type]);
g_clear_object (&data_device->owners[selection_type]);
}
static void
destroy_drag_focus (struct wl_listener *listener, void *data)
{
MetaWaylandDragGrab *grab = wl_container_of (listener, grab, drag_focus_listener);
grab->drag_focus_data_device = NULL;
g_clear_signal_handler (&grab->drag_focus_destroy_handler_id,
grab->drag_focus);
grab->drag_focus = NULL;
}
static void
on_drag_focus_destroyed (MetaWaylandSurface *surface,
MetaWaylandDragGrab *grab)
{
meta_wayland_surface_drag_dest_focus_out (grab->drag_focus);
grab->drag_focus = NULL;
}
static void
meta_wayland_drag_grab_set_source (MetaWaylandDragGrab *drag_grab,
MetaWaylandDataSource *source)
{
if (drag_grab->drag_data_source)
g_object_weak_unref (G_OBJECT (drag_grab->drag_data_source),
drag_grab_data_source_destroyed,
drag_grab);
drag_grab->drag_data_source = source;
if (source)
g_object_weak_ref (G_OBJECT (source),
drag_grab_data_source_destroyed,
drag_grab);
}
static void
meta_wayland_drag_source_fake_acceptance (MetaWaylandDataSource *source,
const gchar *mimetype)
{
uint32_t actions, user_action, action = 0;
meta_wayland_data_source_get_actions (source, &actions);
user_action = meta_wayland_data_source_get_user_action (source);
/* Pick a suitable action */
if ((user_action & actions) != 0)
action = user_action;
else if (actions != 0)
action = 1 << (ffs (actions) - 1);
/* Bail out if there is none, source didn't cooperate */
if (action == 0)
return;
meta_wayland_data_source_target (source, mimetype);
meta_wayland_data_source_set_current_action (source, action);
meta_wayland_data_source_set_has_target (source, TRUE);
}
void
meta_wayland_drag_grab_set_focus (MetaWaylandDragGrab *drag_grab,
MetaWaylandSurface *surface)
{
MetaWaylandSeat *seat = drag_grab->seat;
MetaWaylandDataSource *source = drag_grab->drag_data_source;
struct wl_client *client;
struct wl_resource *data_device_resource, *offer = NULL;
if (!drag_grab->need_initial_focus &&
drag_grab->drag_focus == surface)
return;
drag_grab->need_initial_focus = FALSE;
if (drag_grab->drag_focus)
{
meta_wayland_surface_drag_dest_focus_out (drag_grab->drag_focus);
g_clear_signal_handler (&drag_grab->drag_focus_destroy_handler_id,
drag_grab->drag_focus);
drag_grab->drag_focus = NULL;
}
if (source)
meta_wayland_data_source_set_current_offer (source, NULL);
if (!surface && source &&
meta_wayland_data_source_has_mime_type (source, ROOTWINDOW_DROP_MIME))
meta_wayland_drag_source_fake_acceptance (source, ROOTWINDOW_DROP_MIME);
else if (source)
meta_wayland_data_source_target (source, NULL);
if (!surface)
return;
if (!source &&
wl_resource_get_client (surface->resource) != drag_grab->drag_client)
return;
client = wl_resource_get_client (surface->resource);
data_device_resource = wl_resource_find_for_client (&seat->data_device.resource_list, client);
if (!data_device_resource)
{
data_device_resource =
wl_resource_find_for_client (&seat->data_device.focus_resource_list,
client);
}
if (source && data_device_resource)
offer = create_and_send_dnd_offer (source, data_device_resource);
drag_grab->drag_focus = surface;
drag_grab->drag_focus_destroy_handler_id =
g_signal_connect (surface, "destroy",
G_CALLBACK (on_drag_focus_destroyed),
drag_grab);
drag_grab->drag_focus_data_device = data_device_resource;
meta_wayland_surface_drag_dest_focus_in (drag_grab->drag_focus,
offer ? wl_resource_get_user_data (offer) : NULL);
}
MetaWaylandSurface *
meta_wayland_drag_grab_get_focus (MetaWaylandDragGrab *drag_grab)
{
return drag_grab->drag_focus;
}
void
meta_wayland_drag_grab_update_feedback_actor (MetaWaylandDragGrab *drag_grab,
ClutterEvent *event)
{
meta_feedback_actor_update (META_FEEDBACK_ACTOR (drag_grab->feedback_actor),
event);
}
static void
drag_grab_focus (MetaWaylandPointerGrab *grab,
MetaWaylandSurface *surface)
{
MetaWaylandDragGrab *drag_grab = (MetaWaylandDragGrab*) grab;
meta_wayland_drag_grab_set_focus (drag_grab, surface);
}
static void
data_source_update_user_dnd_action (MetaWaylandDataSource *source,
ClutterModifierType modifiers)
{
enum wl_data_device_manager_dnd_action user_dnd_action = 0;
if (modifiers & CLUTTER_SHIFT_MASK)
user_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
else if (modifiers & CLUTTER_CONTROL_MASK)
user_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
else if (modifiers & (CLUTTER_MOD1_MASK | CLUTTER_BUTTON2_MASK))
user_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK;
meta_wayland_data_source_set_user_action (source, user_dnd_action);
}
static void
drag_grab_motion (MetaWaylandPointerGrab *grab,
const ClutterEvent *event)
{
MetaWaylandDragGrab *drag_grab = (MetaWaylandDragGrab*) grab;
if (drag_grab->drag_focus)
meta_wayland_surface_drag_dest_motion (drag_grab->drag_focus, event);
if (drag_grab->drag_surface)
meta_feedback_actor_update (META_FEEDBACK_ACTOR (drag_grab->feedback_actor),
event);
}
static void
data_device_end_drag_grab (MetaWaylandDragGrab *drag_grab)
{
meta_wayland_drag_grab_set_source (drag_grab, NULL);
meta_wayland_drag_grab_set_focus (drag_grab, NULL);
if (drag_grab->drag_origin)
{
drag_grab->drag_origin = NULL;
wl_list_remove (&drag_grab->drag_origin_listener.link);
}
if (drag_grab->drag_surface)
{
drag_grab->drag_surface = NULL;
wl_list_remove (&drag_grab->drag_icon_listener.link);
}
if (drag_grab->feedback_actor)
{
clutter_actor_remove_all_children (drag_grab->feedback_actor);
clutter_actor_destroy (drag_grab->feedback_actor);
}
drag_grab->seat->data_device.current_grab = NULL;
/* There might be other grabs created in result to DnD actions like popups
* on "ask" actions, we must not reset those, only our own.
*/
if (drag_grab->generic.pointer->grab == (MetaWaylandPointerGrab *) drag_grab)
{
meta_wayland_pointer_end_grab (drag_grab->generic.pointer);
meta_wayland_keyboard_end_grab (drag_grab->keyboard_grab.keyboard);
meta_display_sync_wayland_input_focus (meta_get_display ());
}
g_free (drag_grab);
}
static gboolean
on_fake_read_hup (GIOChannel *channel,
GIOCondition condition,
gpointer data)
{
MetaWaylandDataSource *source = data;
meta_wayland_data_source_notify_finish (source);
g_io_channel_shutdown (channel, FALSE, NULL);
g_io_channel_unref (channel);
return G_SOURCE_REMOVE;
}
static void
meta_wayland_data_source_fake_read (MetaWaylandDataSource *source,
const gchar *mimetype)
{
GIOChannel *channel;
int p[2];
if (!g_unix_open_pipe (p, FD_CLOEXEC, NULL))
{
meta_wayland_data_source_notify_finish (source);
return;
}
if (!g_unix_set_fd_nonblocking (p[0], TRUE, NULL) ||
!g_unix_set_fd_nonblocking (p[1], TRUE, NULL))
{
meta_wayland_data_source_notify_finish (source);
close (p[0]);
close (p[1]);
return;
}
meta_wayland_data_source_send (source, mimetype, p[1]);
channel = g_io_channel_unix_new (p[0]);
g_io_add_watch (channel, G_IO_HUP, on_fake_read_hup, source);
}
static void
drag_grab_button (MetaWaylandPointerGrab *grab,
const ClutterEvent *event)
{
MetaWaylandDragGrab *drag_grab = (MetaWaylandDragGrab*) grab;
MetaWaylandSeat *seat = drag_grab->seat;
ClutterEventType event_type = clutter_event_type (event);
if (drag_grab->generic.pointer->grab_button == clutter_event_get_button (event) &&
event_type == CLUTTER_BUTTON_RELEASE)
{
MetaWaylandDataSource *source = drag_grab->drag_data_source;
gboolean success;
if (drag_grab->drag_focus && source &&
meta_wayland_data_source_has_target (source) &&
meta_wayland_data_source_get_current_action (source))
{
meta_wayland_surface_drag_dest_drop (drag_grab->drag_focus);
meta_wayland_data_source_notify_drop_performed (source);
meta_wayland_data_source_update_in_ask (source);
success = TRUE;
}
else if (!drag_grab->drag_focus && source &&
meta_wayland_data_source_has_target (source) &&
meta_wayland_data_source_get_current_action (source) &&
meta_wayland_data_source_has_mime_type (source, ROOTWINDOW_DROP_MIME))
{
/* Perform a fake read, that will lead to notify_finish() being called */
meta_wayland_data_source_fake_read (source, ROOTWINDOW_DROP_MIME);
success = TRUE;
}
else
{
if (source)
meta_wayland_data_source_set_current_offer (source, NULL);
meta_wayland_data_device_set_dnd_source (&seat->data_device, NULL);
unset_selection_source (&seat->data_device, META_SELECTION_DND);
success = FALSE;
}
/* Finish drag and let actor self-destruct */
meta_dnd_actor_drag_finish (META_DND_ACTOR (drag_grab->feedback_actor), success);
drag_grab->feedback_actor = NULL;
}
if (seat->pointer->button_count == 0 &&
event_type == CLUTTER_BUTTON_RELEASE)
data_device_end_drag_grab (drag_grab);
}
static const MetaWaylandPointerGrabInterface drag_grab_interface = {
drag_grab_focus,
drag_grab_motion,
drag_grab_button,
};
static gboolean
keyboard_drag_grab_key (MetaWaylandKeyboardGrab *grab,
const ClutterEvent *event)
{
if (event->key.keyval == CLUTTER_KEY_Escape)
{
MetaWaylandDragGrab *drag_grab;
drag_grab = wl_container_of (grab, drag_grab, keyboard_grab);
meta_wayland_data_source_cancel (drag_grab->drag_data_source);
meta_wayland_data_source_set_current_offer (drag_grab->drag_data_source, NULL);
meta_dnd_actor_drag_finish (META_DND_ACTOR (drag_grab->feedback_actor), FALSE);
drag_grab->feedback_actor = NULL;
data_device_end_drag_grab (drag_grab);
return TRUE;
}
return FALSE;
}
static void
keyboard_drag_grab_modifiers (MetaWaylandKeyboardGrab *grab,
ClutterModifierType modifiers)
{
MetaWaylandDragGrab *drag_grab;
drag_grab = wl_container_of (grab, drag_grab, keyboard_grab);
/* The modifiers here just contain keyboard modifiers, mix it with the
* mouse button modifiers we got when starting the drag operation.
*/
modifiers |= drag_grab->buttons;
if (drag_grab->drag_data_source)
{
data_source_update_user_dnd_action (drag_grab->drag_data_source, modifiers);
if (drag_grab->drag_focus)
meta_wayland_surface_drag_dest_update (drag_grab->drag_focus);
}
}
static const MetaWaylandKeyboardGrabInterface keyboard_drag_grab_interface = {
keyboard_drag_grab_key,
keyboard_drag_grab_modifiers
};
static void
destroy_data_device_origin (struct wl_listener *listener, void *data)
{
MetaWaylandDragGrab *drag_grab =
wl_container_of (listener, drag_grab, drag_origin_listener);
drag_grab->drag_origin = NULL;
meta_wayland_data_device_set_dnd_source (&drag_grab->seat->data_device, NULL);
unset_selection_source (&drag_grab->seat->data_device, META_SELECTION_DND);
meta_wayland_data_source_set_current_offer (drag_grab->drag_data_source, NULL);
data_device_end_drag_grab (drag_grab);
}
static void
drag_grab_data_source_destroyed (gpointer data, GObject *where_the_object_was)
{
MetaWaylandDragGrab *drag_grab = data;
drag_grab->drag_data_source = NULL;
data_device_end_drag_grab (drag_grab);
}
static void
destroy_data_device_icon (struct wl_listener *listener, void *data)
{
MetaWaylandDragGrab *drag_grab =
wl_container_of (listener, drag_grab, drag_icon_listener);
drag_grab->drag_surface = NULL;
if (drag_grab->feedback_actor)
clutter_actor_remove_all_children (drag_grab->feedback_actor);
}
void
meta_wayland_data_device_start_drag (MetaWaylandDataDevice *data_device,
struct wl_client *client,
const MetaWaylandPointerGrabInterface *funcs,
MetaWaylandSurface *surface,
MetaWaylandDataSource *source,
MetaWaylandSurface *icon_surface)
{
MetaWaylandSeat *seat = wl_container_of (data_device, seat, data_device);
MetaWaylandDragGrab *drag_grab;
graphene_point_t pos, surface_pos;
ClutterModifierType modifiers;
MetaSurfaceActor *surface_actor;
data_device->current_grab = drag_grab = g_new0 (MetaWaylandDragGrab, 1);
drag_grab->generic.interface = funcs;
drag_grab->generic.pointer = seat->pointer;
drag_grab->keyboard_grab.interface = &keyboard_drag_grab_interface;
drag_grab->keyboard_grab.keyboard = seat->keyboard;
drag_grab->drag_client = client;
drag_grab->seat = seat;
drag_grab->drag_origin = surface;
drag_grab->drag_origin_listener.notify = destroy_data_device_origin;
wl_resource_add_destroy_listener (surface->resource,
&drag_grab->drag_origin_listener);
surface_actor = meta_wayland_surface_get_actor (surface);
clutter_actor_transform_stage_point (CLUTTER_ACTOR (surface_actor),
seat->pointer->grab_x,
seat->pointer->grab_y,
&surface_pos.x, &surface_pos.y);
drag_grab->drag_start_x = surface_pos.x;
drag_grab->drag_start_y = surface_pos.y;
drag_grab->need_initial_focus = TRUE;
clutter_seat_query_state (clutter_input_device_get_seat (seat->pointer->device),
seat->pointer->device, NULL, NULL, &modifiers);
drag_grab->buttons = modifiers &
(CLUTTER_BUTTON1_MASK | CLUTTER_BUTTON2_MASK | CLUTTER_BUTTON3_MASK |
CLUTTER_BUTTON4_MASK | CLUTTER_BUTTON5_MASK);
meta_wayland_drag_grab_set_source (drag_grab, source);
meta_wayland_data_device_set_dnd_source (data_device,
drag_grab->drag_data_source);
data_source_update_user_dnd_action (source, modifiers);
if (icon_surface)
{
ClutterActor *drag_surface_actor;
drag_grab->drag_surface = icon_surface;
drag_grab->drag_icon_listener.notify = destroy_data_device_icon;
wl_resource_add_destroy_listener (icon_surface->resource,
&drag_grab->drag_icon_listener);
drag_surface_actor = CLUTTER_ACTOR (meta_wayland_surface_get_actor (drag_grab->drag_surface));
drag_grab->feedback_actor = meta_dnd_actor_new (CLUTTER_ACTOR (surface_actor),
drag_grab->drag_start_x,
drag_grab->drag_start_y);
meta_feedback_actor_set_anchor (META_FEEDBACK_ACTOR (drag_grab->feedback_actor),
0, 0);
clutter_actor_add_child (drag_grab->feedback_actor, drag_surface_actor);
clutter_seat_query_state (clutter_input_device_get_seat (seat->pointer->device),
seat->pointer->device, NULL, &pos, NULL);
meta_feedback_actor_set_position (META_FEEDBACK_ACTOR (drag_grab->feedback_actor),
pos.x, pos.y);
}
meta_wayland_pointer_start_grab (seat->pointer,
(MetaWaylandPointerGrab*) drag_grab);
meta_wayland_data_source_set_seat (source, seat);
}
void
meta_wayland_data_device_end_drag (MetaWaylandDataDevice *data_device)
{
if (data_device->current_grab)
data_device_end_drag_grab (data_device->current_grab);
}
static void
data_device_start_drag (struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *source_resource,
struct wl_resource *origin_resource,
struct wl_resource *icon_resource, guint32 serial)
{
MetaWaylandDataDevice *data_device = wl_resource_get_user_data (resource);
MetaWaylandSeat *seat = wl_container_of (data_device, seat, data_device);
MetaWaylandSurface *surface = NULL, *icon_surface = NULL;
MetaWaylandDataSource *drag_source = NULL;
MetaSelectionSource *selection_source;
if (origin_resource)
surface = wl_resource_get_user_data (origin_resource);
if (!surface)
return;
if (seat->pointer->button_count == 0 ||
seat->pointer->grab_serial != serial ||
!seat->pointer->focus_surface ||
seat->pointer->focus_surface != surface)
return;
/* FIXME: Check that the data source type array isn't empty. */
if (data_device->current_grab ||
seat->pointer->grab != &seat->pointer->default_grab)
return;
if (icon_resource)
icon_surface = wl_resource_get_user_data (icon_resource);
if (source_resource)
drag_source = wl_resource_get_user_data (source_resource);
if (icon_resource &&
!meta_wayland_surface_assign_role (icon_surface,
META_TYPE_WAYLAND_SURFACE_ROLE_DND,
NULL))
{
wl_resource_post_error (resource, WL_DATA_DEVICE_ERROR_ROLE,
"wl_surface@%d already has a different role",
wl_resource_get_id (icon_resource));
return;
}
selection_source = meta_selection_source_wayland_new (drag_source);
set_selection_source (data_device, META_SELECTION_DND,
selection_source);
g_object_unref (selection_source);
meta_wayland_pointer_set_focus (seat->pointer, NULL);
meta_wayland_data_device_start_drag (data_device, client,
&drag_grab_interface,
surface, drag_source, icon_surface);
if (meta_wayland_seat_has_keyboard (seat))
meta_wayland_keyboard_start_grab (seat->keyboard,
&seat->data_device.current_grab->keyboard_grab);
}
static void
selection_data_source_destroyed (gpointer data, GObject *object_was_here)
{
MetaWaylandDataDevice *data_device = data;
data_device->selection_data_source = NULL;
unset_selection_source (data_device, META_SELECTION_CLIPBOARD);
}
static void
meta_wayland_drag_dest_focus_in (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface,
MetaWaylandDataOffer *offer)
{
MetaWaylandDragGrab *grab = data_device->current_grab;
MetaWaylandDataSource *source;
struct wl_display *display;
struct wl_client *client;
struct wl_resource *resource;
uint32_t source_actions;
wl_fixed_t sx, sy;
if (!grab->drag_focus_data_device)
return;
client = wl_resource_get_client (surface->resource);
display = wl_client_get_display (client);
grab->drag_focus_listener.notify = destroy_drag_focus;
wl_resource_add_destroy_listener (grab->drag_focus_data_device,
&grab->drag_focus_listener);
resource = meta_wayland_data_offer_get_resource (offer);
if (wl_resource_get_version (resource) >=
WL_DATA_OFFER_SOURCE_ACTIONS_SINCE_VERSION)
{
source = meta_wayland_data_offer_get_source (offer);
meta_wayland_data_source_get_actions (source, &source_actions);
wl_data_offer_send_source_actions (resource, source_actions);
}
meta_wayland_pointer_get_relative_coordinates (grab->generic.pointer,
surface, &sx, &sy);
wl_data_device_send_enter (grab->drag_focus_data_device,
wl_display_next_serial (display),
surface->resource, sx, sy, resource);
}
static void
meta_wayland_drag_dest_focus_out (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface)
{
MetaWaylandDragGrab *grab = data_device->current_grab;
if (!grab->drag_focus_data_device)
return;
wl_data_device_send_leave (grab->drag_focus_data_device);
wl_list_remove (&grab->drag_focus_listener.link);
grab->drag_focus_data_device = NULL;
}
static void
meta_wayland_drag_dest_motion (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface,
const ClutterEvent *event)
{
MetaWaylandDragGrab *grab = data_device->current_grab;
wl_fixed_t sx, sy;
if (!grab->drag_focus_data_device)
return;
meta_wayland_pointer_get_relative_coordinates (grab->generic.pointer,
grab->drag_focus,
&sx, &sy);
wl_data_device_send_motion (grab->drag_focus_data_device,
clutter_event_get_time (event),
sx, sy);
}
static void
meta_wayland_drag_dest_drop (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface)
{
MetaWaylandDragGrab *grab = data_device->current_grab;
if (!grab->drag_focus_data_device)
return;
wl_data_device_send_drop (grab->drag_focus_data_device);
}
static void
meta_wayland_drag_dest_update (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface)
{
}
static const MetaWaylandDragDestFuncs meta_wayland_drag_dest_funcs = {
meta_wayland_drag_dest_focus_in,
meta_wayland_drag_dest_focus_out,
meta_wayland_drag_dest_motion,
meta_wayland_drag_dest_drop,
meta_wayland_drag_dest_update
};
const MetaWaylandDragDestFuncs *
meta_wayland_data_device_get_drag_dest_funcs (void)
{
return &meta_wayland_drag_dest_funcs;
}
static void
dnd_data_source_destroyed (gpointer data,
GObject *object_was_here)
{
MetaWaylandDataDevice *data_device = data;
data_device->dnd_data_source = NULL;
unset_selection_source (data_device, META_SELECTION_DND);
}
void
meta_wayland_data_device_set_dnd_source (MetaWaylandDataDevice *data_device,
MetaWaylandDataSource *source)
{
if (data_device->dnd_data_source == source)
return;
if (data_device->dnd_data_source)
{
g_object_weak_unref (G_OBJECT (data_device->dnd_data_source),
dnd_data_source_destroyed,
data_device);
}
data_device->dnd_data_source = source;
if (source)
{
g_object_weak_ref (G_OBJECT (source),
dnd_data_source_destroyed,
data_device);
}
}
void
meta_wayland_data_device_set_selection (MetaWaylandDataDevice *data_device,
MetaWaylandDataSource *source,
guint32 serial)
{
MetaWaylandSeat *seat = wl_container_of (data_device, seat, data_device);
MetaSelectionSource *selection_source;
if (data_device->selection_data_source &&
data_device->selection_serial - serial < UINT32_MAX / 2)
return;
if (data_device->selection_data_source)
{
g_object_weak_unref (G_OBJECT (data_device->selection_data_source),
selection_data_source_destroyed,
data_device);
data_device->selection_data_source = NULL;
}
data_device->selection_data_source = source;
data_device->selection_serial = serial;
if (source)
{
meta_wayland_data_source_set_seat (source, seat);
g_object_weak_ref (G_OBJECT (source),
selection_data_source_destroyed,
data_device);
selection_source = meta_selection_source_wayland_new (source);
}
else
{
selection_source = g_object_new (META_TYPE_SELECTION_SOURCE_MEMORY, NULL);
}
set_selection_source (data_device, META_SELECTION_CLIPBOARD,
selection_source);
g_object_unref (selection_source);
}
static void
data_device_set_selection (struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *source_resource,
guint32 serial)
{
MetaWaylandDataDevice *data_device = wl_resource_get_user_data (resource);
MetaWaylandSeat *seat = wl_container_of (data_device, seat, data_device);
MetaWaylandDataSource *source;
if (source_resource)
source = wl_resource_get_user_data (source_resource);
else
source = NULL;
if (source)
{
if (meta_wayland_data_source_get_actions (source, NULL))
{
wl_resource_post_error(source_resource,
WL_DATA_SOURCE_ERROR_INVALID_SOURCE,
"cannot set drag-and-drop source as selection");
return;
}
}
if (wl_resource_get_client (resource) !=
meta_wayland_keyboard_get_focus_client (seat->keyboard))
{
if (source)
meta_wayland_data_source_cancel (source);
return;
}
/* FIXME: Store serial and check against incoming serial here. */
meta_wayland_data_device_set_selection (data_device, source, serial);
}
static const struct wl_data_device_interface data_device_interface = {
data_device_start_drag,
data_device_set_selection,
default_destructor,
};
static void
create_data_source (struct wl_client *client,
struct wl_resource *resource, guint32 id)
{
struct wl_resource *source_resource;
source_resource = wl_resource_create (client, &wl_data_source_interface,
wl_resource_get_version (resource), id);
meta_wayland_data_source_new (source_resource);
}
static void
owner_changed_cb (MetaSelection *selection,
MetaSelectionType selection_type,
MetaSelectionSource *new_owner,
MetaWaylandDataDevice *data_device)
{
MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
MetaWaylandSeat *seat = compositor->seat;
struct wl_resource *data_device_resource;
struct wl_client *focus_client;
focus_client = meta_wayland_keyboard_get_focus_client (seat->keyboard);
if (!focus_client)
return;
if (selection_type == META_SELECTION_CLIPBOARD)
{
wl_resource_for_each (data_device_resource, &data_device->focus_resource_list)
{
struct wl_resource *offer = NULL;
if (new_owner)
{
offer = create_and_send_clipboard_offer (data_device,
data_device_resource);
}
wl_data_device_send_selection (data_device_resource, offer);
}
}
}
static void
ensure_owners_changed_handler_connected (MetaWaylandDataDevice *data_device)
{
if (data_device->selection_owner_signal_id != 0)
return;
data_device->selection_owner_signal_id =
g_signal_connect (meta_display_get_selection (meta_get_display ()),
"owner-changed",
G_CALLBACK (owner_changed_cb), data_device);
}
static void
get_data_device (struct wl_client *client,
struct wl_resource *manager_resource,
guint32 id, struct wl_resource *seat_resource)
{
MetaWaylandSeat *seat = wl_resource_get_user_data (seat_resource);
struct wl_resource *cr;
cr = wl_resource_create (client, &wl_data_device_interface, wl_resource_get_version (manager_resource), id);
wl_resource_set_implementation (cr, &data_device_interface, &seat->data_device, unbind_resource);
wl_list_insert (&seat->data_device.resource_list, wl_resource_get_link (cr));
ensure_owners_changed_handler_connected (&seat->data_device);
}
static const struct wl_data_device_manager_interface manager_interface = {
create_data_source,
get_data_device
};
static void
bind_manager (struct wl_client *client,
void *data, guint32 version, guint32 id)
{
struct wl_resource *resource;
resource = wl_resource_create (client, &wl_data_device_manager_interface, version, id);
wl_resource_set_implementation (resource, &manager_interface, NULL, NULL);
}
void
meta_wayland_data_device_manager_init (MetaWaylandCompositor *compositor)
{
if (wl_global_create (compositor->wayland_display,
&wl_data_device_manager_interface,
META_WL_DATA_DEVICE_MANAGER_VERSION,
NULL, bind_manager) == NULL)
g_error ("Could not create data_device");
}
void
meta_wayland_data_device_init (MetaWaylandDataDevice *data_device)
{
wl_list_init (&data_device->resource_list);
wl_list_init (&data_device->focus_resource_list);
}
static struct wl_resource *
create_and_send_clipboard_offer (MetaWaylandDataDevice *data_device,
struct wl_resource *target)
{
MetaWaylandDataOffer *offer;
MetaDisplay *display = meta_get_display ();
struct wl_resource *resource;
GList *mimetypes, *l;
mimetypes = meta_selection_get_mimetypes (meta_display_get_selection (display),
META_SELECTION_CLIPBOARD);
if (!mimetypes)
return NULL;
offer = meta_wayland_data_offer_new (META_SELECTION_CLIPBOARD, NULL, target);
resource = meta_wayland_data_offer_get_resource (offer);
wl_data_device_send_data_offer (target, resource);
for (l = mimetypes; l; l = l->next)
wl_data_offer_send_offer (resource, l->data);
g_list_free_full (mimetypes, g_free);
return resource;
}
void
meta_wayland_data_device_set_keyboard_focus (MetaWaylandDataDevice *data_device)
{
MetaWaylandSeat *seat = wl_container_of (data_device, seat, data_device);
struct wl_client *focus_client;
struct wl_resource *data_device_resource;
focus_client = meta_wayland_keyboard_get_focus_client (seat->keyboard);
if (focus_client == data_device->focus_client)
return;
data_device->focus_client = focus_client;
move_resources (&data_device->resource_list,
&data_device->focus_resource_list);
if (!focus_client)
return;
move_resources_for_client (&data_device->focus_resource_list,
&data_device->resource_list,
focus_client);
wl_resource_for_each (data_device_resource, &data_device->focus_resource_list)
{
struct wl_resource *offer;
offer = create_and_send_clipboard_offer (data_device, data_device_resource);
wl_data_device_send_selection (data_device_resource, offer);
}
}
gboolean
meta_wayland_data_device_is_dnd_surface (MetaWaylandDataDevice *data_device,
MetaWaylandSurface *surface)
{
return data_device->current_grab &&
data_device->current_grab->drag_surface == surface;
}
MetaWaylandDragGrab *
meta_wayland_data_device_get_current_grab (MetaWaylandDataDevice *data_device)
{
return data_device->current_grab;
}
void
meta_wayland_data_device_unset_dnd_selection (MetaWaylandDataDevice *data_device)
{
unset_selection_source (data_device, META_SELECTION_DND);
}
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