gtk/gdk/wayland/gdkdnd-wayland.c
Carlos Garnacho 7b85a3417a wayland: Implement drag sources
The wl_data_source is retrieved from the selection object for the DnD
selection, and used to initiate a drag. When the drag is finished, a
button release or touch end event is synthesized to finish the DnD
operation after the compositor grab is gone.

https://bugzilla.gnome.org/show_bug.cgi?id=697855
2014-09-01 19:17:53 +02:00

505 lines
15 KiB
C

/*
* 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 "gdkdndprivate.h"
#include "gdkmain.h"
#include "gdkinternals.h"
#include "gdkproperty.h"
#include "gdkprivate-wayland.h"
#include "gdkdisplay-wayland.h"
#include <string.h>
#define GDK_TYPE_WAYLAND_DRAG_CONTEXT (gdk_wayland_drag_context_get_type ())
#define GDK_WAYLAND_DRAG_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_WAYLAND_DRAG_CONTEXT, GdkWaylandDragContext))
#define GDK_WAYLAND_DRAG_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WAYLAND_DRAG_CONTEXT, GdkWaylandDragContextClass))
#define GDK_IS_WAYLAND_DRAG_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_WAYLAND_DRAG_CONTEXT))
#define GDK_IS_WAYLAND_DRAG_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WAYLAND_DRAG_CONTEXT))
#define GDK_WAYLAND_DRAG_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WAYLAND_DRAG_CONTEXT, GdkWaylandDragContextClass))
typedef struct _GdkWaylandDragContext GdkWaylandDragContext;
typedef struct _GdkWaylandDragContextClass GdkWaylandDragContextClass;
struct _GdkWaylandDragContext
{
GdkDragContext context;
GdkWindow *dnd_window;
struct wl_surface *dnd_surface;
struct wl_data_source *data_source;
struct wl_data_offer *offer;
uint32_t serial;
gdouble x;
gdouble y;
};
struct _GdkWaylandDragContextClass
{
GdkDragContextClass parent_class;
};
static GList *contexts;
G_DEFINE_TYPE (GdkWaylandDragContext, gdk_wayland_drag_context, GDK_TYPE_DRAG_CONTEXT)
static void
gdk_wayland_drag_context_finalize (GObject *object)
{
GdkWaylandDragContext *wayland_context = GDK_WAYLAND_DRAG_CONTEXT (object);
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
contexts = g_list_remove (contexts, context);
if (context->is_source &&
gdk_selection_owner_get (gdk_drag_get_selection (context)) == context->source_window)
gdk_wayland_selection_unset_data_source (gdk_drag_get_selection (context));
if (wayland_context->data_source)
wl_data_source_destroy (wayland_context->data_source);
if (wayland_context->dnd_window)
gdk_window_destroy (wayland_context->dnd_window);
G_OBJECT_CLASS (gdk_wayland_drag_context_parent_class)->finalize (object);
}
void
_gdk_wayland_drag_context_emit_event (GdkDragContext *context,
GdkEventType type,
guint32 time_)
{
GdkWindow *window;
GdkEvent *event;
switch (type)
{
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DRAG_STATUS:
case GDK_DROP_START:
case GDK_DROP_FINISHED:
break;
default:
return;
}
if (context->is_source)
window = gdk_drag_context_get_source_window (context);
else
window = gdk_drag_context_get_dest_window (context);
event = gdk_event_new (type);
event->dnd.window = g_object_ref (window);
event->dnd.context = g_object_ref (context);
event->dnd.time = time_;
event->dnd.x_root = GDK_WAYLAND_DRAG_CONTEXT (context)->x;
event->dnd.y_root = GDK_WAYLAND_DRAG_CONTEXT (context)->y;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
gdk_event_put (event);
gdk_event_free (event);
}
static GdkWindow *
gdk_wayland_drag_context_find_window (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkDragProtocol *protocol)
{
GdkDevice *device;
GdkWindow *window;
device = gdk_drag_context_get_device (context);
window = gdk_device_get_window_at_position (device, NULL, NULL);
if (window)
{
window = gdk_window_get_toplevel (window);
*protocol = GDK_DRAG_PROTO_WAYLAND;
return g_object_ref (window);
}
return NULL;
}
void
gdk_wayland_drag_context_set_action (GdkDragContext *context,
GdkDragAction action)
{
context->suggested_action = context->action = action;
}
static gboolean
gdk_wayland_drag_context_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
if (context->dest_window != dest_window)
{
context->dest_window = dest_window ? g_object_ref (dest_window) : NULL;
_gdk_wayland_drag_context_set_coords (context, x_root, y_root);
_gdk_wayland_drag_context_emit_event (context, GDK_DRAG_STATUS, time);
}
gdk_wayland_drag_context_set_action (context, suggested_action);
return context->dest_window != NULL;
}
static void
gdk_wayland_drag_context_drag_abort (GdkDragContext *context,
guint32 time)
{
}
static void
gdk_wayland_drag_context_drag_drop (GdkDragContext *context,
guint32 time)
{
}
/* Destination side */
static void
gdk_wayland_drop_context_set_status (GdkDragContext *context,
gboolean accepted)
{
GdkWaylandDragContext *context_wayland;
struct wl_data_offer *wl_offer;
context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
wl_offer = gdk_wayland_selection_get_offer ();
if (!wl_offer)
return;
if (accepted)
{
GList *l;
for (l = context->targets; l; l = l->next)
{
if (l->data != gdk_atom_intern_static_string ("DELETE"))
break;
}
if (l)
{
wl_data_offer_accept (wl_offer, context_wayland->serial,
gdk_atom_name (l->data));
return;
}
}
wl_data_offer_accept (wl_offer, context_wayland->serial, NULL);
}
static void
gdk_wayland_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time_)
{
gdk_wayland_drop_context_set_status (context, action != 0);
}
static void
gdk_wayland_drag_context_drop_reply (GdkDragContext *context,
gboolean accepted,
guint32 time_)
{
gdk_wayland_drop_context_set_status (context, accepted);
}
static void
gdk_wayland_drag_context_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
if (gdk_selection_owner_get (gdk_drag_get_selection (context)))
gdk_wayland_selection_unset_data_source (gdk_drag_get_selection (context));
}
static gboolean
gdk_wayland_drag_context_drop_status (GdkDragContext *context)
{
return FALSE;
}
static GdkAtom
gdk_wayland_drag_context_get_selection (GdkDragContext *context)
{
return gdk_atom_intern_static_string ("GdkWaylandSelection");
}
static void
gdk_wayland_drag_context_init (GdkWaylandDragContext *context_wayland)
{
GdkDragContext *context;
context = GDK_DRAG_CONTEXT (context_wayland);
contexts = g_list_prepend (contexts, context);
context->action = GDK_ACTION_COPY;
context->suggested_action = GDK_ACTION_COPY;
context->actions = GDK_ACTION_COPY | GDK_ACTION_MOVE;
}
static void
gdk_wayland_drag_context_class_init (GdkWaylandDragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDragContextClass *context_class = GDK_DRAG_CONTEXT_CLASS (klass);
object_class->finalize = gdk_wayland_drag_context_finalize;
context_class->find_window = gdk_wayland_drag_context_find_window;
context_class->drag_status = gdk_wayland_drag_context_drag_status;
context_class->drag_motion = gdk_wayland_drag_context_drag_motion;
context_class->drag_abort = gdk_wayland_drag_context_drag_abort;
context_class->drag_drop = gdk_wayland_drag_context_drag_drop;
context_class->drop_reply = gdk_wayland_drag_context_drop_reply;
context_class->drop_finish = gdk_wayland_drag_context_drop_finish;
context_class->drop_status = gdk_wayland_drag_context_drop_status;
context_class->get_selection = gdk_wayland_drag_context_get_selection;
}
GdkDragProtocol
_gdk_wayland_window_get_drag_protocol (GdkWindow *window, GdkWindow **target)
{
return GDK_DRAG_PROTO_WAYLAND;
}
void
_gdk_wayland_window_register_dnd (GdkWindow *window)
{
}
static GdkWindow *
create_dnd_window (void)
{
GdkWindowAttr attrs;
GdkScreen *screen;
guint mask;
screen = gdk_display_get_default_screen (gdk_display_get_default ());
attrs.x = attrs.y = 0;
attrs.width = attrs.height = 100;
attrs.wclass = GDK_INPUT_OUTPUT;
attrs.window_type = GDK_WINDOW_TEMP;
attrs.type_hint = GDK_WINDOW_TYPE_HINT_DND;
attrs.visual = gdk_screen_get_system_visual (screen);
mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_TYPE_HINT;
return gdk_window_new (gdk_screen_get_root_window (screen), &attrs, mask);
}
GdkDragContext *
_gdk_wayland_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GList *targets)
{
GdkWaylandDragContext *context_wayland;
GdkWaylandDisplay *display_wayland;
GdkDragContext *context;
GdkWindow *toplevel;
GList *l;
toplevel = gdk_device_get_window_at_position (device, NULL, NULL);
context_wayland = g_object_new (GDK_TYPE_WAYLAND_DRAG_CONTEXT, NULL);
context = GDK_DRAG_CONTEXT (context_wayland);
context->source_window = g_object_ref (window);
context->is_source = TRUE;
context->targets = g_list_copy (targets);
gdk_drag_context_set_device (context, device);
display_wayland = GDK_WAYLAND_DISPLAY (gdk_device_get_display (device));
context_wayland->dnd_window = create_dnd_window ();
context_wayland->dnd_surface = gdk_wayland_window_get_wl_surface (context_wayland->dnd_window);
context_wayland->data_source =
gdk_wayland_selection_get_data_source (window,
gdk_wayland_drag_context_get_selection (context));
for (l = context->targets; l; l = l->next)
wl_data_source_offer (context_wayland->data_source, gdk_atom_name (l->data));
wl_data_device_start_drag (gdk_wayland_device_get_data_device (device),
context_wayland->data_source,
gdk_wayland_window_get_wl_surface (toplevel),
context_wayland->dnd_surface,
_gdk_wayland_display_get_serial (display_wayland));
return context;
}
GdkDragContext *
_gdk_wayland_drop_context_new (GdkDevice *device,
struct wl_data_device *data_device)
{
GdkWaylandDragContext *context_wayland;
GdkDragContext *context;
context_wayland = g_object_new (GDK_TYPE_WAYLAND_DRAG_CONTEXT, NULL);
context = GDK_DRAG_CONTEXT (context_wayland);
context->is_source = FALSE;
gdk_drag_context_set_device (context, device);
return context;
}
void
gdk_wayland_drop_context_update_targets (GdkDragContext *context)
{
g_list_free (context->targets);
context->targets = g_list_copy (gdk_wayland_selection_get_targets ());
}
void
_gdk_wayland_drag_context_set_coords (GdkDragContext *context,
gdouble x,
gdouble y)
{
GdkWaylandDragContext *context_wayland;
context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
context_wayland->x = x;
context_wayland->y = y;
}
void
_gdk_wayland_drag_context_set_source_window (GdkDragContext *context,
GdkWindow *window)
{
if (context->source_window)
g_object_unref (context->source_window);
context->source_window = window ? g_object_ref (window) : NULL;
}
void
_gdk_wayland_drag_context_set_dest_window (GdkDragContext *context,
GdkWindow *dest_window,
uint32_t serial)
{
context->dest_window = dest_window ? g_object_ref (dest_window) : NULL;
GDK_WAYLAND_DRAG_CONTEXT (context)->serial = serial;
gdk_wayland_drop_context_update_targets (context);
}
GdkDragContext *
gdk_wayland_drag_context_lookup_by_data_source (struct wl_data_source *source)
{
GList *l;
for (l = contexts; l; l = l->next)
{
GdkWaylandDragContext *wayland_context = l->data;
if (wayland_context->data_source == source)
return l->data;
}
return NULL;
}
GdkDragContext *
gdk_wayland_drag_context_lookup_by_source_window (GdkWindow *window)
{
GList *l;
for (l = contexts; l; l = l->next)
{
if (window == gdk_drag_context_get_source_window (l->data))
return l->data;
}
return NULL;
}
struct wl_data_source *
gdk_wayland_drag_context_get_data_source (GdkDragContext *context)
{
return GDK_WAYLAND_DRAG_CONTEXT (context)->data_source;
}
void
gdk_wayland_drag_context_undo_grab (GdkDragContext *context)
{
GdkEventSequence *sequence;
GdkModifierType state;
GdkDevice *device;
GdkEvent *event;
guint button;
gdouble x, y;
device = gdk_drag_context_get_device (context);
_gdk_wayland_device_get_last_implicit_grab_serial (GDK_WAYLAND_DEVICE (device), &sequence);
gdk_window_get_device_position_double (gdk_drag_context_get_source_window (context),
device, &x, &y, &state);
if (sequence)
{
event = gdk_event_new (GDK_TOUCH_END);
event->touch.window = g_object_ref (gdk_drag_context_get_source_window (context));
event->touch.send_event = TRUE;
event->touch.sequence = sequence;
event->touch.time = GDK_CURRENT_TIME;
event->touch.x = event->touch.x_root = x;
event->touch.y = event->touch.y_root = y;
}
else if (state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK))
{
if (state & GDK_BUTTON1_MASK)
button = 1;
else if (state & GDK_BUTTON2_MASK)
button = 2;
else if (state & GDK_BUTTON3_MASK)
button = 3;
else
return;
event = gdk_event_new (GDK_BUTTON_RELEASE);
event->button.window = g_object_ref (gdk_drag_context_get_source_window (context));
event->button.send_event = TRUE;
event->button.button = button;
event->button.time = GDK_CURRENT_TIME;
event->button.x = event->button.x_root = x;
event->button.y = event->button.x_root = y;
}
else
return;
gdk_event_set_device (event, device);
gdk_event_set_source_device (event, device);
_gdk_wayland_display_deliver_event (gdk_device_get_display (device), event);
}