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gtk/gdk/wayland/gdkdnd-wayland.c
Benjamin Otte 2f12eb616a wayland: Initialize variable 
Otherwise we get NULL-warnings when we try to use (read: unref) it.
2017-12-04 18:28:53 +01:00

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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 "gdkdndprivate.h"
#include "gdkinternals.h"
#include "gdkproperty.h"
#include "gdkprivate-wayland.h"
#include "gdkcontentformats.h"
#include "gdkdisplay-wayland.h"
#include "gdkseat-wayland.h"
#include "gdkdeviceprivate.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;
GdkDragAction selected_action;
uint32_t serial;
gdouble x;
gdouble y;
gint hot_x;
gint hot_y;
};
struct _GdkWaylandDragContextClass
{
GdkDragContextClass parent_class;
};
static GList *contexts;
GType gdk_wayland_drag_context_get_type (void);
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);
GdkWindow *dnd_window;
contexts = g_list_remove (contexts, context);
if (context->is_source)
{
GdkDisplay *display = gdk_window_get_display (context->source_window);
GdkAtom selection;
GdkWindow *selection_owner;
selection = gdk_drag_get_selection (context);
selection_owner = gdk_selection_owner_get_for_display (display, selection);
if (selection_owner == context->source_window)
gdk_wayland_selection_unset_data_source (display, selection);
gdk_drag_context_set_cursor (context, NULL);
}
if (wayland_context->data_source)
wl_data_source_destroy (wayland_context->data_source);
dnd_window = wayland_context->dnd_window;
G_OBJECT_CLASS (gdk_wayland_drag_context_parent_class)->finalize (object);
if (dnd_window)
gdk_window_destroy (dnd_window);
}
void
_gdk_wayland_drag_context_emit_event (GdkDragContext *context,
GdkEventType type,
guint32 time_)
{
GdkWindow *window;
GdkEvent *event;
switch ((guint) 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,
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;
}
static inline uint32_t
gdk_to_wl_actions (GdkDragAction action)
{
uint32_t dnd_actions = 0;
if (action & (GDK_ACTION_COPY | GDK_ACTION_LINK | GDK_ACTION_PRIVATE))
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;
}
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;
GdkDisplay *display;
struct wl_data_offer *wl_offer;
if (!context->dest_window)
return;
context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
display = gdk_device_get_display (gdk_drag_context_get_device (context));
wl_offer = gdk_wayland_selection_get_offer (display,
gdk_drag_get_selection (context));
if (!wl_offer)
return;
if (accepted)
{
const char *const *mimetypes;
gsize i, n_mimetypes;
mimetypes = gdk_content_formats_get_mime_types (context->formats, &n_mimetypes);
for (i = 0; i < n_mimetypes; i++)
{
if (mimetypes[i] != gdk_atom_intern_static_string ("DELETE"))
break;
}
if (i < n_mimetypes)
{
wl_data_offer_accept (wl_offer, context_wayland->serial, mimetypes[i]);
return;
}
}
wl_data_offer_accept (wl_offer, context_wayland->serial, NULL);
}
static void
gdk_wayland_drag_context_commit_status (GdkDragContext *context)
{
GdkWaylandDragContext *wayland_context;
GdkDisplay *display;
uint32_t dnd_actions;
wayland_context = GDK_WAYLAND_DRAG_CONTEXT (context);
display = gdk_device_get_display (gdk_drag_context_get_device (context));
dnd_actions = gdk_to_wl_actions (wayland_context->selected_action);
gdk_wayland_selection_set_current_offer_actions (display, dnd_actions);
gdk_wayland_drop_context_set_status (context, wayland_context->selected_action != 0);
}
static void
gdk_wayland_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time_)
{
GdkWaylandDragContext *wayland_context;
wayland_context = GDK_WAYLAND_DRAG_CONTEXT (context);
wayland_context->selected_action = action;
}
static void
gdk_wayland_drag_context_drop_reply (GdkDragContext *context,
gboolean accepted,
guint32 time_)
{
if (!accepted)
gdk_wayland_drop_context_set_status (context, accepted);
}
static void
gdk_wayland_drag_context_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
GdkDisplay *display = gdk_device_get_display (gdk_drag_context_get_device (context));
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
GdkWaylandDragContext *wayland_context;
struct wl_data_offer *wl_offer;
GdkAtom selection;
wayland_context = GDK_WAYLAND_DRAG_CONTEXT (context);
selection = gdk_drag_get_selection (context);
wl_offer = gdk_wayland_selection_get_offer (display, selection);
if (wl_offer && success && wayland_context->selected_action &&
wayland_context->selected_action != GDK_ACTION_ASK)
{
gdk_wayland_drag_context_commit_status (context);
if (display_wayland->data_device_manager_version >=
WL_DATA_OFFER_FINISH_SINCE_VERSION)
wl_data_offer_finish (wl_offer);
}
gdk_wayland_selection_set_offer (display, selection, NULL);
}
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 GdkWindow *
gdk_wayland_drag_context_get_drag_window (GdkDragContext *context)
{
return GDK_WAYLAND_DRAG_CONTEXT (context)->dnd_window;
}
static void
gdk_wayland_drag_context_set_hotspot (GdkDragContext *context,
gint hot_x,
gint hot_y)
{
GdkWaylandDragContext *context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
gint prev_hot_x = context_wayland->hot_x;
gint prev_hot_y = context_wayland->hot_y;
const GdkRectangle damage_rect = { .width = 1, .height = 1 };
context_wayland->hot_x = hot_x;
context_wayland->hot_y = hot_y;
if (prev_hot_x == hot_x && prev_hot_y == hot_y)
return;
_gdk_wayland_window_offset_next_wl_buffer (context_wayland->dnd_window,
-hot_x, -hot_y);
gdk_window_invalidate_rect (context_wayland->dnd_window, &damage_rect, FALSE);
}
static gboolean
gdk_wayland_drag_context_manage_dnd (GdkDragContext *context,
GdkWindow *ipc_window,
GdkDragAction actions)
{
GdkWaylandDragContext *context_wayland;
GdkWaylandDisplay *display_wayland;
GdkDevice *device;
GdkWindow *toplevel;
device = gdk_drag_context_get_device (context);
display_wayland = GDK_WAYLAND_DISPLAY (gdk_device_get_display (device));
toplevel = _gdk_device_window_at_position (device, NULL, NULL, NULL, TRUE);
context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
if (display_wayland->data_device_manager_version >=
WL_DATA_SOURCE_SET_ACTIONS_SINCE_VERSION)
{
wl_data_source_set_actions (context_wayland->data_source,
gdk_to_wl_actions (actions));
}
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));
gdk_seat_ungrab (gdk_device_get_seat (device));
return TRUE;
}
static void
gdk_wayland_drag_context_set_cursor (GdkDragContext *context,
GdkCursor *cursor)
{
GdkDevice *device = gdk_drag_context_get_device (context);
gdk_wayland_seat_set_global_cursor (gdk_device_get_seat (device), cursor);
}
static void
gdk_wayland_drag_context_action_changed (GdkDragContext *context,
GdkDragAction action)
{
GdkCursor *cursor;
cursor = gdk_drag_get_cursor (context, action);
gdk_drag_context_set_cursor (context, cursor);
}
static void
gdk_wayland_drag_context_drop_performed (GdkDragContext *context,
guint32 time_)
{
gdk_drag_context_set_cursor (context, NULL);
}
static void
gdk_wayland_drag_context_cancel (GdkDragContext *context,
GdkDragCancelReason reason)
{
gdk_drag_context_set_cursor (context, NULL);
}
static void
gdk_wayland_drag_context_drop_done (GdkDragContext *context,
gboolean success)
{
GdkWaylandDragContext *context_wayland = GDK_WAYLAND_DRAG_CONTEXT (context);
if (success)
{
if (context_wayland->dnd_window)
gdk_window_hide (context_wayland->dnd_window);
}
}
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;
context_class->get_drag_window = gdk_wayland_drag_context_get_drag_window;
context_class->set_hotspot = gdk_wayland_drag_context_set_hotspot;
context_class->drop_done = gdk_wayland_drag_context_drop_done;
context_class->manage_dnd = gdk_wayland_drag_context_manage_dnd;
context_class->set_cursor = gdk_wayland_drag_context_set_cursor;
context_class->action_changed = gdk_wayland_drag_context_action_changed;
context_class->drop_performed = gdk_wayland_drag_context_drop_performed;
context_class->cancel = gdk_wayland_drag_context_cancel;
context_class->commit_drag_status = gdk_wayland_drag_context_commit_status;
}
void
_gdk_wayland_window_register_dnd (GdkWindow *window)
{
}
static GdkWindow *
create_dnd_window (GdkDisplay *display)
{
GdkWindow *window;
window = gdk_window_new_popup (display, &(GdkRectangle) { 0, 0, 100, 100 });
gdk_window_set_type_hint (window, GDK_WINDOW_TYPE_HINT_DND);
return window;
}
GdkDragContext *
_gdk_wayland_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GdkContentFormats *formats,
gint x_root,
gint y_root)
{
GdkWaylandDragContext *context_wayland;
GdkDragContext *context;
const char *const *mimetypes;
gsize i, n_mimetypes;
context_wayland = g_object_new (GDK_TYPE_WAYLAND_DRAG_CONTEXT, NULL);
context = GDK_DRAG_CONTEXT (context_wayland);
context->display = gdk_window_get_display (window);
context->source_window = g_object_ref (window);
context->is_source = TRUE;
context->formats = gdk_content_formats_ref (formats);
gdk_drag_context_set_device (context, device);
context_wayland->dnd_window = create_dnd_window (gdk_window_get_display (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));
mimetypes = gdk_content_formats_get_mime_types (context->formats, &n_mimetypes);
for (i = 0; i < n_mimetypes; i++)
{
wl_data_source_offer (context_wayland->data_source, mimetypes[i]);
}
return context;
}
GdkDragContext *
_gdk_wayland_drop_context_new (GdkDisplay *display,
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->display = display;
context->is_source = FALSE;
context->formats = gdk_content_formats_new (NULL, 0);
return context;
}
void
gdk_wayland_drop_context_update_targets (GdkDragContext *context)
{
GdkDisplay *display;
GdkDevice *device;
device = gdk_drag_context_get_device (context);
display = gdk_device_get_display (device);
gdk_content_formats_unref (context->formats);
context->formats = gdk_wayland_selection_get_targets (display,
gdk_drag_get_selection (context));
if (context->formats)
gdk_content_formats_ref (context->formats);
else
context->formats = gdk_content_formats_new (NULL, 0);
}
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)
{
if (context->dest_window)
g_object_unref (context->dest_window);
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;
}
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