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gtk2/gdk/x11/gdkdnd-x11.c
Benjamin Otte 43c212ac28 build: Enable -Wswitch-enum and -Wswitch-default 
This patch makes that work using 1 of 2 options:

1. Add all missing enums to the switch statement
  or
2. Cast the switch argument to a uint to avoid having to do that (mostly
   for GdkEventType).

I even found a bug while doing that: clearing a GtkImage with a surface
did not notify thae surface property.

The reason for enabling this flag even though it is tedious at times is
that it is very useful when adding values to an enum, because it makes
GTK immediately warn about all the switch statements where this enum is
relevant.
And I expect changes to enums to be frequent during the GTK4 development
cycle.
2017-10-06 21:23:39 +02:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdkx11dnd.h"
#include "gdkdndprivate.h"
#include "gdkmain.h"
#include "gdkinternals.h"
#include "gdkasync.h"
#include "gdkproperty.h"
#include "gdkprivate-x11.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay-x11.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/shape.h>
#ifdef HAVE_XCOMPOSITE
#include <X11/extensions/Xcomposite.h>
#endif
#include <string.h>
typedef enum {
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GtkDragStatus;
typedef struct {
guint32 xid;
gint x, y, width, height;
gboolean mapped;
gboolean shape_selected;
gboolean shape_valid;
cairo_region_t *shape;
} GdkCacheChild;
typedef struct {
GList *children;
GHashTable *child_hash;
guint old_event_mask;
GdkScreen *screen;
gint ref_count;
} GdkWindowCache;
struct _GdkX11DragContext
{
GdkDragContext context;
gint start_x; /* Where the drag started */
gint start_y;
guint16 last_x; /* Coordinates from last event */
guint16 last_y;
GdkDragAction old_action; /* The last action we sent to the source */
GdkDragAction old_actions; /* The last actions we sent to the source */
GdkDragAction xdnd_actions; /* What is currently set in XdndActionList */
guint version; /* Xdnd protocol version */
GSList *window_caches;
GdkWindow *drag_window;
GdkWindow *ipc_window;
GdkCursor *cursor;
GdkSeat *grab_seat;
GdkDragAction actions;
GdkDragAction current_action;
gint hot_x;
gint hot_y;
Window dest_xid; /* The last window we looked up */
Window drop_xid; /* The (non-proxied) window that is receiving drops */
guint xdnd_targets_set : 1; /* Whether we've already set XdndTypeList */
guint xdnd_actions_set : 1; /* Whether we've already set XdndActionList */
guint xdnd_have_actions : 1; /* Whether an XdndActionList was provided */
guint drag_status : 4; /* current status of drag */
guint drop_failed : 1; /* Whether the drop was unsuccessful */
};
struct _GdkX11DragContextClass
{
GdkDragContextClass parent_class;
};
typedef struct {
gint keysym;
gint modifiers;
} GrabKey;
static GrabKey grab_keys[] = {
{ XK_Escape, 0 },
{ XK_space, 0 },
{ XK_KP_Space, 0 },
{ XK_Return, 0 },
{ XK_KP_Enter, 0 },
{ XK_Up, 0 },
{ XK_Up, Mod1Mask },
{ XK_Down, 0 },
{ XK_Down, Mod1Mask },
{ XK_Left, 0 },
{ XK_Left, Mod1Mask },
{ XK_Right, 0 },
{ XK_Right, Mod1Mask },
{ XK_KP_Up, 0 },
{ XK_KP_Up, Mod1Mask },
{ XK_KP_Down, 0 },
{ XK_KP_Down, Mod1Mask },
{ XK_KP_Left, 0 },
{ XK_KP_Left, Mod1Mask },
{ XK_KP_Right, 0 },
{ XK_KP_Right, Mod1Mask }
};
/* Forward declarations */
static GdkWindowCache *gdk_window_cache_get (GdkScreen *screen);
static GdkWindowCache *gdk_window_cache_ref (GdkWindowCache *cache);
static void gdk_window_cache_unref (GdkWindowCache *cache);
static GdkFilterReturn xdnd_enter_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static GdkFilterReturn xdnd_leave_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static GdkFilterReturn xdnd_position_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static GdkFilterReturn xdnd_status_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static GdkFilterReturn xdnd_finished_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static GdkFilterReturn xdnd_drop_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
static void xdnd_manage_source_filter (GdkDragContext *context,
GdkWindow *window,
gboolean add_filter);
gboolean gdk_x11_drag_context_handle_event (GdkDragContext *context,
const GdkEvent *event);
void gdk_x11_drag_context_action_changed (GdkDragContext *context,
GdkDragAction action);
static GList *contexts;
static GSList *window_caches;
static const struct {
const char *atom_name;
GdkFilterFunc func;
} xdnd_filters[] = {
{ "XdndEnter", xdnd_enter_filter },
{ "XdndLeave", xdnd_leave_filter },
{ "XdndPosition", xdnd_position_filter },
{ "XdndStatus", xdnd_status_filter },
{ "XdndFinished", xdnd_finished_filter },
{ "XdndDrop", xdnd_drop_filter },
};
G_DEFINE_TYPE (GdkX11DragContext, gdk_x11_drag_context, GDK_TYPE_DRAG_CONTEXT)
static void
gdk_x11_drag_context_init (GdkX11DragContext *context)
{
contexts = g_list_prepend (contexts, context);
}
static void gdk_x11_drag_context_finalize (GObject *object);
static GdkWindow * gdk_x11_drag_context_find_window (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkDragProtocol *protocol);
static gboolean gdk_x11_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);
static void gdk_x11_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time_);
static void gdk_x11_drag_context_drag_abort (GdkDragContext *context,
guint32 time_);
static void gdk_x11_drag_context_drag_drop (GdkDragContext *context,
guint32 time_);
static void gdk_x11_drag_context_drop_reply (GdkDragContext *context,
gboolean accept,
guint32 time_);
static void gdk_x11_drag_context_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time_);
static gboolean gdk_x11_drag_context_drop_status (GdkDragContext *context);
static GdkAtom gdk_x11_drag_context_get_selection (GdkDragContext *context);
static GdkWindow * gdk_x11_drag_context_get_drag_window (GdkDragContext *context);
static void gdk_x11_drag_context_set_hotspot (GdkDragContext *context,
gint hot_x,
gint hot_y);
static void gdk_x11_drag_context_drop_done (GdkDragContext *context,
gboolean success);
static gboolean gdk_x11_drag_context_manage_dnd (GdkDragContext *context,
GdkWindow *window,
GdkDragAction actions);
static void gdk_x11_drag_context_set_cursor (GdkDragContext *context,
GdkCursor *cursor);
static void gdk_x11_drag_context_cancel (GdkDragContext *context,
GdkDragCancelReason reason);
static void gdk_x11_drag_context_drop_performed (GdkDragContext *context,
guint32 time);
static void
gdk_x11_drag_context_class_init (GdkX11DragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDragContextClass *context_class = GDK_DRAG_CONTEXT_CLASS (klass);
object_class->finalize = gdk_x11_drag_context_finalize;
context_class->find_window = gdk_x11_drag_context_find_window;
context_class->drag_status = gdk_x11_drag_context_drag_status;
context_class->drag_motion = gdk_x11_drag_context_drag_motion;
context_class->drag_abort = gdk_x11_drag_context_drag_abort;
context_class->drag_drop = gdk_x11_drag_context_drag_drop;
context_class->drop_reply = gdk_x11_drag_context_drop_reply;
context_class->drop_finish = gdk_x11_drag_context_drop_finish;
context_class->drop_status = gdk_x11_drag_context_drop_status;
context_class->get_selection = gdk_x11_drag_context_get_selection;
context_class->get_drag_window = gdk_x11_drag_context_get_drag_window;
context_class->set_hotspot = gdk_x11_drag_context_set_hotspot;
context_class->drop_done = gdk_x11_drag_context_drop_done;
context_class->manage_dnd = gdk_x11_drag_context_manage_dnd;
context_class->set_cursor = gdk_x11_drag_context_set_cursor;
context_class->cancel = gdk_x11_drag_context_cancel;
context_class->drop_performed = gdk_x11_drag_context_drop_performed;
context_class->handle_event = gdk_x11_drag_context_handle_event;
context_class->action_changed = gdk_x11_drag_context_action_changed;
}
static void
gdk_x11_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (object);
GdkWindow *drag_window;
if (context->source_window)
{
if ((context->protocol == GDK_DRAG_PROTO_XDND) && !context->is_source)
xdnd_manage_source_filter (context, context->source_window, FALSE);
}
g_slist_free_full (x11_context->window_caches, (GDestroyNotify)gdk_window_cache_unref);
x11_context->window_caches = NULL;
contexts = g_list_remove (contexts, context);
drag_window = context->drag_window;
G_OBJECT_CLASS (gdk_x11_drag_context_parent_class)->finalize (object);
if (drag_window)
gdk_window_destroy (drag_window);
}
/* Drag Contexts */
static GdkDragContext *
gdk_drag_context_find (GdkDisplay *display,
gboolean is_source,
Window source_xid,
Window dest_xid)
{
GList *tmp_list;
GdkDragContext *context;
GdkX11DragContext *context_x11;
Window context_dest_xid;
for (tmp_list = contexts; tmp_list; tmp_list = tmp_list->next)
{
context = (GdkDragContext *)tmp_list->data;
context_x11 = (GdkX11DragContext *)context;
if ((context->source_window && gdk_window_get_display (context->source_window) != display) ||
(context->dest_window && gdk_window_get_display (context->dest_window) != display))
continue;
context_dest_xid = context->dest_window
? (context_x11->drop_xid
? context_x11->drop_xid
: GDK_WINDOW_XID (context->dest_window))
: None;
if ((!context->is_source == !is_source) &&
((source_xid == None) || (context->source_window &&
(GDK_WINDOW_XID (context->source_window) == source_xid))) &&
((dest_xid == None) || (context_dest_xid == dest_xid)))
return context;
}
return NULL;
}
static void
precache_target_list (GdkDragContext *context)
{
if (context->targets)
{
GPtrArray *targets = g_ptr_array_new ();
GList *tmp_list;
int i;
for (tmp_list = context->targets; tmp_list; tmp_list = tmp_list->next)
g_ptr_array_add (targets, gdk_atom_name (GDK_POINTER_TO_ATOM (tmp_list->data)));
_gdk_x11_precache_atoms (GDK_WINDOW_DISPLAY (context->source_window),
(const gchar **)targets->pdata,
targets->len);
for (i =0; i < targets->len; i++)
g_free (targets->pdata[i]);
g_ptr_array_free (targets, TRUE);
}
}
/* Utility functions */
static void
free_cache_child (GdkCacheChild *child,
GdkDisplay *display)
{
if (child->shape)
cairo_region_destroy (child->shape);
if (child->shape_selected && display)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, 0);
}
g_free (child);
}
static void
gdk_window_cache_add (GdkWindowCache *cache,
guint32 xid,
gint x,
gint y,
gint width,
gint height,
gboolean mapped)
{
GdkCacheChild *child = g_new (GdkCacheChild, 1);
child->xid = xid;
child->x = x;
child->y = y;
child->width = width;
child->height = height;
child->mapped = mapped;
child->shape_selected = FALSE;
child->shape_valid = FALSE;
child->shape = NULL;
cache->children = g_list_prepend (cache->children, child);
g_hash_table_insert (cache->child_hash, GUINT_TO_POINTER (xid),
cache->children);
}
static GdkFilterReturn
gdk_window_cache_shape_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
GdkWindowCache *cache = data;
GdkX11Display *display = GDK_X11_DISPLAY (gdk_screen_get_display (cache->screen));
if (display->have_shapes &&
xevent->type == display->shape_event_base + ShapeNotify)
{
XShapeEvent *xse = (XShapeEvent*)xevent;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xse->window));
if (node)
{
GdkCacheChild *child = node->data;
child->shape_valid = FALSE;
if (child->shape)
{
cairo_region_destroy (child->shape);
child->shape = NULL;
}
}
return GDK_FILTER_REMOVE;
}
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn
gdk_window_cache_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
GdkWindowCache *cache = data;
switch (xevent->type)
{
case CirculateNotify:
break;
case ConfigureNotify:
{
XConfigureEvent *xce = &xevent->xconfigure;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->window));
if (node)
{
GdkCacheChild *child = node->data;
child->x = xce->x;
child->y = xce->y;
child->width = xce->width;
child->height = xce->height;
if (xce->above == None && (node->next))
{
GList *last = g_list_last (cache->children);
cache->children = g_list_remove_link (cache->children, node);
last->next = node;
node->next = NULL;
node->prev = last;
}
else
{
GList *above_node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->above));
if (above_node && node->next != above_node)
{
/* Put the window above (before in the list) above_node */
cache->children = g_list_remove_link (cache->children, node);
node->prev = above_node->prev;
if (node->prev)
node->prev->next = node;
else
cache->children = node;
node->next = above_node;
above_node->prev = node;
}
}
}
break;
}
case CreateNotify:
{
XCreateWindowEvent *xcwe = &xevent->xcreatewindow;
if (!g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xcwe->window)))
gdk_window_cache_add (cache, xcwe->window,
xcwe->x, xcwe->y, xcwe->width, xcwe->height,
FALSE);
break;
}
case DestroyNotify:
{
XDestroyWindowEvent *xdwe = &xevent->xdestroywindow;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
if (node)
{
GdkCacheChild *child = node->data;
g_hash_table_remove (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
cache->children = g_list_remove_link (cache->children, node);
/* window is destroyed, no need to disable ShapeNotify */
free_cache_child (child, NULL);
g_list_free_1 (node);
}
break;
}
case MapNotify:
{
XMapEvent *xme = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xme->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = TRUE;
}
break;
}
case ReparentNotify:
break;
case UnmapNotify:
{
XMapEvent *xume = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xume->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = FALSE;
}
break;
}
default:
return GDK_FILTER_CONTINUE;
}
return GDK_FILTER_REMOVE;
}
static GdkWindowCache *
gdk_window_cache_new (GdkScreen *screen)
{
XWindowAttributes xwa;
Display *xdisplay = GDK_SCREEN_XDISPLAY (screen);
GdkWindow *root_window = gdk_screen_get_root_window (screen);
GdkChildInfoX11 *children;
guint nchildren, i;
#ifdef HAVE_XCOMPOSITE
Window cow;
#endif
GdkWindowCache *result = g_new (GdkWindowCache, 1);
result->children = NULL;
result->child_hash = g_hash_table_new (g_direct_hash, NULL);
result->screen = screen;
result->ref_count = 1;
XGetWindowAttributes (xdisplay, GDK_WINDOW_XID (root_window), &xwa);
result->old_event_mask = xwa.your_event_mask;
if (G_UNLIKELY (!GDK_X11_DISPLAY (GDK_X11_SCREEN (screen)->display)->trusted_client))
{
GList *toplevel_windows, *list;
GdkWindow *window;
GdkWindowImplX11 *impl;
gint x, y, width, height;
toplevel_windows = gdk_screen_get_toplevel_windows (screen);
for (list = toplevel_windows; list; list = list->next)
{
window = GDK_WINDOW (list->data);
impl = GDK_WINDOW_IMPL_X11 (window->impl);
gdk_window_get_geometry (window, &x, &y, &width, &height);
gdk_window_cache_add (result, GDK_WINDOW_XID (window),
x * impl->window_scale, y * impl->window_scale,
width * impl->window_scale,
height * impl->window_scale,
gdk_window_is_visible (window));
}
g_list_free (toplevel_windows);
return result;
}
XSelectInput (xdisplay, GDK_WINDOW_XID (root_window),
result->old_event_mask | SubstructureNotifyMask);
gdk_window_add_filter (root_window, gdk_window_cache_filter, result);
gdk_window_add_filter (NULL, gdk_window_cache_shape_filter, result);
if (!_gdk_x11_get_window_child_info (gdk_screen_get_display (screen),
GDK_WINDOW_XID (root_window),
FALSE, NULL,
&children, &nchildren))
return result;
for (i = 0; i < nchildren ; i++)
{
gdk_window_cache_add (result, children[i].window,
children[i].x, children[i].y, children[i].width, children[i].height,
children[i].is_mapped);
}
g_free (children);
#ifdef HAVE_XCOMPOSITE
/*
* Add the composite overlay window to the cache, as this can be a reasonable
* Xdnd proxy as well.
* This is only done when the screen is composited in order to avoid mapping
* the COW. We assume that the CM is using the COW (which is true for pretty
* much any CM currently in use).
*/
if (gdk_display_is_composited (gdk_screen_get_display (screen)))
{
cow = XCompositeGetOverlayWindow (xdisplay, GDK_WINDOW_XID (root_window));
gdk_window_cache_add (result, cow, 0, 0,
gdk_window_get_width (root_window) * GDK_X11_SCREEN(screen)->window_scale,
gdk_window_get_height (root_window) * GDK_X11_SCREEN(screen)->window_scale,
TRUE);
XCompositeReleaseOverlayWindow (xdisplay, GDK_WINDOW_XID (root_window));
}
#endif
return result;
}
static void
gdk_window_cache_destroy (GdkWindowCache *cache)
{
GdkWindow *root_window = gdk_screen_get_root_window (cache->screen);
GdkDisplay *display;
XSelectInput (GDK_WINDOW_XDISPLAY (root_window),
GDK_WINDOW_XID (root_window),
cache->old_event_mask);
gdk_window_remove_filter (root_window, gdk_window_cache_filter, cache);
gdk_window_remove_filter (NULL, gdk_window_cache_shape_filter, cache);
display = gdk_screen_get_display (cache->screen);
gdk_x11_display_error_trap_push (display);
g_list_foreach (cache->children, (GFunc)free_cache_child, display);
gdk_x11_display_error_trap_pop_ignored (display);
g_list_free (cache->children);
g_hash_table_destroy (cache->child_hash);
g_free (cache);
}
static GdkWindowCache *
gdk_window_cache_ref (GdkWindowCache *cache)
{
cache->ref_count += 1;
return cache;
}
static void
gdk_window_cache_unref (GdkWindowCache *cache)
{
g_assert (cache->ref_count > 0);
cache->ref_count -= 1;
if (cache->ref_count == 0)
{
window_caches = g_slist_remove (window_caches, cache);
gdk_window_cache_destroy (cache);
}
}
GdkWindowCache *
gdk_window_cache_get (GdkScreen *screen)
{
GSList *list;
GdkWindowCache *cache;
for (list = window_caches; list; list = list->next)
{
cache = list->data;
if (cache->screen == screen)
return gdk_window_cache_ref (cache);
}
cache = gdk_window_cache_new (screen);
window_caches = g_slist_prepend (window_caches, cache);
return cache;
}
static gboolean
is_pointer_within_shape (GdkDisplay *display,
GdkCacheChild *child,
gint x_pos,
gint y_pos)
{
if (!child->shape_selected)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, ShapeNotifyMask);
child->shape_selected = TRUE;
}
if (!child->shape_valid)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
cairo_region_t *input_shape;
child->shape = NULL;
if (gdk_display_supports_shapes (display))
child->shape = _gdk_x11_xwindow_get_shape (display_x11->xdisplay,
child->xid, 1, ShapeBounding);
#ifdef ShapeInput
input_shape = NULL;
if (gdk_display_supports_input_shapes (display))
input_shape = _gdk_x11_xwindow_get_shape (display_x11->xdisplay,
child->xid, 1, ShapeInput);
if (child->shape && input_shape)
{
cairo_region_intersect (child->shape, input_shape);
cairo_region_destroy (input_shape);
}
else if (input_shape)
{
child->shape = input_shape;
}
#endif
child->shape_valid = TRUE;
}
return child->shape == NULL ||
cairo_region_contains_point (child->shape, x_pos, y_pos);
}
static Window
get_client_window_at_coords_recurse (GdkDisplay *display,
Window win,
gboolean is_toplevel,
gint x,
gint y)
{
GdkChildInfoX11 *children;
unsigned int nchildren;
int i;
gboolean found_child = FALSE;
GdkChildInfoX11 child = { 0, };
gboolean has_wm_state = FALSE;
if (!_gdk_x11_get_window_child_info (display, win, TRUE,
is_toplevel? &has_wm_state : NULL,
&children, &nchildren))
return None;
if (has_wm_state)
{
g_free (children);
return win;
}
for (i = nchildren - 1; (i >= 0) && !found_child; i--)
{
GdkChildInfoX11 *cur_child = &children[i];
if ((cur_child->is_mapped) && (cur_child->window_class == InputOutput) &&
(x >= cur_child->x) && (x < cur_child->x + cur_child->width) &&
(y >= cur_child->y) && (y < cur_child->y + cur_child->height))
{
x -= cur_child->x;
y -= cur_child->y;
child = *cur_child;
found_child = TRUE;
}
}
g_free (children);
if (found_child)
{
if (child.has_wm_state)
return child.window;
else
return get_client_window_at_coords_recurse (display, child.window, FALSE, x, y);
}
else
return None;
}
static Window
get_client_window_at_coords (GdkWindowCache *cache,
Window ignore,
gint x_root,
gint y_root)
{
GList *tmp_list;
Window retval = None;
GdkDisplay *display;
display = gdk_screen_get_display (cache->screen);
gdk_x11_display_error_trap_push (display);
tmp_list = cache->children;
while (tmp_list && !retval)
{
GdkCacheChild *child = tmp_list->data;
if ((child->xid != ignore) && (child->mapped))
{
if ((x_root >= child->x) && (x_root < child->x + child->width) &&
(y_root >= child->y) && (y_root < child->y + child->height))
{
if (!is_pointer_within_shape (display, child,
x_root - child->x,
y_root - child->y))
{
tmp_list = tmp_list->next;
continue;
}
retval = get_client_window_at_coords_recurse (display,
child->xid, TRUE,
x_root - child->x,
y_root - child->y);
if (!retval)
retval = child->xid;
}
}
tmp_list = tmp_list->next;
}
gdk_x11_display_error_trap_pop_ignored (display);
if (retval)
return retval;
else
return GDK_WINDOW_XID (gdk_screen_get_root_window (cache->screen));
}
#ifdef G_ENABLE_DEBUG
static void
print_target_list (GList *targets)
{
while (targets)
{
gchar *name = gdk_atom_name (GDK_POINTER_TO_ATOM (targets->data));
g_message ("\t%s", name);
g_free (name);
targets = targets->next;
}
}
#endif /* G_ENABLE_DEBUG */
/*************************************************************
***************************** XDND **************************
*************************************************************/
/* Utility functions */
static struct {
const gchar *name;
GdkAtom atom;
GdkDragAction action;
} xdnd_actions_table[] = {
{ "XdndActionCopy", None, GDK_ACTION_COPY },
{ "XdndActionMove", None, GDK_ACTION_MOVE },
{ "XdndActionLink", None, GDK_ACTION_LINK },
{ "XdndActionAsk", None, GDK_ACTION_ASK },
{ "XdndActionPrivate", None, GDK_ACTION_COPY },
};
static const gint xdnd_n_actions = G_N_ELEMENTS (xdnd_actions_table);
static gboolean xdnd_actions_initialized = FALSE;
static void
xdnd_initialize_actions (void)
{
gint i;
xdnd_actions_initialized = TRUE;
for (i = 0; i < xdnd_n_actions; i++)
xdnd_actions_table[i].atom = gdk_atom_intern_static_string (xdnd_actions_table[i].name);
}
static GdkDragAction
xdnd_action_from_atom (GdkDisplay *display,
Atom xatom)
{
GdkAtom atom;
gint i;
if (xatom == None)
return 0;
atom = gdk_x11_xatom_to_atom_for_display (display, xatom);
if (!xdnd_actions_initialized)
xdnd_initialize_actions();
for (i = 0; i < xdnd_n_actions; i++)
if (atom == xdnd_actions_table[i].atom)
return xdnd_actions_table[i].action;
return 0;
}
static Atom
xdnd_action_to_atom (GdkDisplay *display,
GdkDragAction action)
{
gint i;
if (!xdnd_actions_initialized)
xdnd_initialize_actions();
for (i = 0; i < xdnd_n_actions; i++)
if (action == xdnd_actions_table[i].action)
return gdk_x11_atom_to_xatom_for_display (display, xdnd_actions_table[i].atom);
return None;
}
/* Source side */
static GdkFilterReturn
xdnd_status_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDisplay *display;
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
guint32 flags = xevent->xclient.data.l[1];
Atom action = xevent->xclient.data.l[4];
GdkDragContext *context;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndStatus: dest_window: %#x action: %ld",
dest_window, action));
display = gdk_window_get_display (event->any.window);
context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window);
if (context)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
if (context_x11->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
context_x11->drag_status = GDK_DRAG_STATUS_DRAG;
event->dnd.send_event = FALSE;
event->dnd.type = GDK_DRAG_STATUS;
event->dnd.context = context;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
if (!(action != 0) != !(flags & 1))
{
GDK_NOTE (DND,
g_warning ("Received status event with flags not corresponding to action!"));
action = 0;
}
context->action = xdnd_action_from_atom (display, action);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_finished_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDisplay *display;
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
GdkDragContext *context;
GdkX11DragContext *context_x11;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndFinished: dest_window: %#x", dest_window));
display = gdk_window_get_display (event->any.window);
context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window);
if (context)
{
context_x11 = GDK_X11_DRAG_CONTEXT (context);
if (context_x11->version == 5)
context_x11->drop_failed = xevent->xclient.data.l[1] == 0;
event->dnd.type = GDK_DROP_FINISHED;
event->dnd.context = context;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static void
xdnd_set_targets (GdkX11DragContext *context_x11)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
Atom *atomlist;
GList *tmp_list = context->targets;
gint i;
gint n_atoms = g_list_length (context->targets);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
atomlist = g_new (Atom, n_atoms);
i = 0;
while (tmp_list)
{
atomlist[i] = gdk_x11_atom_to_xatom_for_display (display, GDK_POINTER_TO_ATOM (tmp_list->data));
tmp_list = tmp_list->next;
i++;
}
XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XID (context->source_window),
gdk_x11_get_xatom_by_name_for_display (display, "XdndTypeList"),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
g_free (atomlist);
context_x11->xdnd_targets_set = 1;
}
static void
xdnd_set_actions (GdkX11DragContext *context_x11)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
Atom *atomlist;
gint i;
gint n_atoms;
guint actions;
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
if (!xdnd_actions_initialized)
xdnd_initialize_actions();
actions = context->actions;
n_atoms = 0;
for (i = 0; i < xdnd_n_actions; i++)
{
if (actions & xdnd_actions_table[i].action)
{
actions &= ~xdnd_actions_table[i].action;
n_atoms++;
}
}
atomlist = g_new (Atom, n_atoms);
actions = context->actions;
n_atoms = 0;
for (i = 0; i < xdnd_n_actions; i++)
{
if (actions & xdnd_actions_table[i].action)
{
actions &= ~xdnd_actions_table[i].action;
atomlist[n_atoms] = gdk_x11_atom_to_xatom_for_display (display, xdnd_actions_table[i].atom);
n_atoms++;
}
}
XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XID (context->source_window),
gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
g_free (atomlist);
context_x11->xdnd_actions_set = TRUE;
context_x11->xdnd_actions = context->actions;
}
static void
send_client_message_async_cb (Window window,
gboolean success,
gpointer data)
{
GdkDragContext *context = data;
GDK_NOTE (DND,
g_message ("Got async callback for #%lx, success = %d",
window, success));
/* On failure, we immediately continue with the protocol
* so we don't end up blocking for a timeout
*/
if (!success &&
context->dest_window &&
window == GDK_WINDOW_XID (context->dest_window))
{
GdkEvent *temp_event;
GdkX11DragContext *context_x11 = data;
g_object_unref (context->dest_window);
context->dest_window = NULL;
context->action = 0;
context_x11->drag_status = GDK_DRAG_STATUS_DRAG;
temp_event = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
temp_event->dnd.send_event = TRUE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = GDK_CURRENT_TIME;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
g_object_unref (context);
}
static GdkDisplay *
gdk_drag_context_get_display (GdkDragContext *context)
{
if (context->source_window)
return GDK_WINDOW_DISPLAY (context->source_window);
else if (context->dest_window)
return GDK_WINDOW_DISPLAY (context->dest_window);
g_assert_not_reached ();
return NULL;
}
static void
send_client_message_async (GdkDragContext *context,
Window window,
gboolean propagate,
glong event_mask,
XClientMessageEvent *event_send)
{
GdkDisplay *display = gdk_drag_context_get_display (context);
g_object_ref (context);
_gdk_x11_send_client_message_async (display, window,
propagate, event_mask, event_send,
send_client_message_async_cb, context);
}
static gboolean
xdnd_send_xevent (GdkX11DragContext *context_x11,
GdkWindow *window,
gboolean propagate,
XEvent *event_send)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = gdk_drag_context_get_display (context);
Window xwindow;
glong event_mask;
g_assert (event_send->xany.type == ClientMessage);
/* We short-circuit messages to ourselves */
if (gdk_window_get_window_type (window) != GDK_WINDOW_FOREIGN)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (xdnd_filters); i++)
{
if (gdk_x11_get_xatom_by_name_for_display (display, xdnd_filters[i].atom_name) ==
event_send->xclient.message_type)
{
GdkEvent *temp_event;
temp_event = gdk_event_new (GDK_NOTHING);
temp_event->any.window = g_object_ref (window);
if ((*xdnd_filters[i].func) (event_send, temp_event, NULL) == GDK_FILTER_TRANSLATE)
gdk_event_put (temp_event);
gdk_event_free (temp_event);
return TRUE;
}
}
}
xwindow = GDK_WINDOW_XID (window);
if (_gdk_x11_display_is_root_window (display, xwindow))
event_mask = ButtonPressMask;
else
event_mask = 0;
send_client_message_async (context, xwindow, propagate, event_mask,
&event_send->xclient);
return TRUE;
}
static void
xdnd_send_enter (GdkX11DragContext *context_x11)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->dest_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndEnter");
xev.xclient.format = 32;
xev.xclient.window = context_x11->drop_xid
? context_x11->drop_xid
: GDK_WINDOW_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[1] = (context_x11->version << 24); /* version */
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
GDK_NOTE(DND,
g_message ("Sending enter source window %#lx XDND protocol version %d\n",
GDK_WINDOW_XID (context->source_window), context_x11->version));
if (g_list_length (context->targets) > 3)
{
if (!context_x11->xdnd_targets_set)
xdnd_set_targets (context_x11);
xev.xclient.data.l[1] |= 1;
}
else
{
GList *tmp_list = context->targets;
gint i = 2;
while (tmp_list)
{
xev.xclient.data.l[i] = gdk_x11_atom_to_xatom_for_display (display,
GDK_POINTER_TO_ATOM (tmp_list->data));
tmp_list = tmp_list->next;
i++;
}
}
if (!xdnd_send_xevent (context_x11, context->dest_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_leave (GdkX11DragContext *context_x11)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndLeave");
xev.xclient.format = 32;
xev.xclient.window = context_x11->drop_xid
? context_x11->drop_xid
: GDK_WINDOW_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
if (!xdnd_send_xevent (context_x11, context->dest_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_drop (GdkX11DragContext *context_x11,
guint32 time)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndDrop");
xev.xclient.format = 32;
xev.xclient.window = context_x11->drop_xid
? context_x11->drop_xid
: GDK_WINDOW_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = time;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
if (!xdnd_send_xevent (context_x11, context->dest_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_motion (GdkX11DragContext *context_x11,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndPosition");
xev.xclient.format = 32;
xev.xclient.window = context_x11->drop_xid
? context_x11->drop_xid
: GDK_WINDOW_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = (x_root << 16) | y_root;
xev.xclient.data.l[3] = time;
xev.xclient.data.l[4] = xdnd_action_to_atom (display, action);
if (!xdnd_send_xevent (context_x11, context->dest_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
context_x11->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
}
static guint32
xdnd_check_dest (GdkDisplay *display,
Window win,
guint *xdnd_version)
{
gboolean retval = FALSE;
Atom type = None;
int format;
unsigned long nitems, after;
guchar *data;
Atom *version;
Window *proxy_data;
Window proxy;
Atom xdnd_proxy_atom = gdk_x11_get_xatom_by_name_for_display (display, "XdndProxy");
Atom xdnd_aware_atom = gdk_x11_get_xatom_by_name_for_display (display, "XdndAware");
proxy = None;
gdk_x11_display_error_trap_push (display);
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), win,
xdnd_proxy_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
&data) == Success)
{
if (type != None)
{
proxy_data = (Window *)data;
if ((format == 32) && (nitems == 1))
{
proxy = *proxy_data;
}
else
{
GDK_NOTE (DND,
g_warning ("Invalid XdndProxy property on window %ld", win));
}
XFree (proxy_data);
}
if ((XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), proxy ? proxy : win,
xdnd_aware_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
&data) == Success) &&
type != None)
{
version = (Atom *)data;
if ((format == 32) && (nitems == 1))
{
if (*version >= 3)
retval = TRUE;
if (xdnd_version)
*xdnd_version = *version;
}
else
{
GDK_NOTE (DND,
g_warning ("Invalid XdndAware property on window %ld", win));
}
XFree (version);
}
}
gdk_x11_display_error_trap_pop_ignored (display);
return retval ? (proxy ? proxy : win) : None;
}
/* Target side */
static void
xdnd_read_actions (GdkX11DragContext *context_x11)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
Atom type;
int format;
gulong nitems, after;
guchar *data;
Atom *atoms;
gint i;
context_x11->xdnd_have_actions = FALSE;
if (gdk_window_get_window_type (context->source_window) == GDK_WINDOW_FOREIGN)
{
/* Get the XdndActionList, if set */
gdk_x11_display_error_trap_push (display);
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_WINDOW_XID (context->source_window),
gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"),
0, 65536,
False, XA_ATOM, &type, &format, &nitems,
&after, &data) == Success &&
type == XA_ATOM)
{
atoms = (Atom *)data;
context->actions = 0;
for (i = 0; i < nitems; i++)
context->actions |= xdnd_action_from_atom (display, atoms[i]);
context_x11->xdnd_have_actions = TRUE;
#ifdef G_ENABLE_DEBUG
if (GDK_DEBUG_CHECK (DND))
{
GString *action_str = g_string_new (NULL);
if (context->actions & GDK_ACTION_MOVE)
g_string_append(action_str, "MOVE ");
if (context->actions & GDK_ACTION_COPY)
g_string_append(action_str, "COPY ");
if (context->actions & GDK_ACTION_LINK)
g_string_append(action_str, "LINK ");
if (context->actions & GDK_ACTION_ASK)
g_string_append(action_str, "ASK ");
g_message("Xdnd actions = %s", action_str->str);
g_string_free (action_str, TRUE);
}
#endif /* G_ENABLE_DEBUG */
}
if (data)
XFree (data);
gdk_x11_display_error_trap_pop_ignored (display);
}
else
{
/* Local drag
*/
GdkDragContext *source_context;
source_context = gdk_drag_context_find (display, TRUE,
GDK_WINDOW_XID (context->source_window),
GDK_WINDOW_XID (context->dest_window));
if (source_context)
{
context->actions = source_context->actions;
context_x11->xdnd_have_actions = TRUE;
}
}
}
/* We have to make sure that the XdndActionList we keep internally
* is up to date with the XdndActionList on the source window
* because we get no notification, because Xdnd wasn’t meant
* to continually send actions. So we select on PropertyChangeMask
* and add this filter.
*/
static GdkFilterReturn
xdnd_source_window_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer cb_data)
{
XEvent *xevent = (XEvent *)xev;
GdkX11DragContext *context_x11 = cb_data;
GdkDisplay *display = GDK_WINDOW_DISPLAY(event->any.window);
if ((xevent->xany.type == PropertyNotify) &&
(xevent->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList")))
{
xdnd_read_actions (context_x11);
return GDK_FILTER_REMOVE;
}
return GDK_FILTER_CONTINUE;
}
static void
xdnd_manage_source_filter (GdkDragContext *context,
GdkWindow *window,
gboolean add_filter)
{
if (!GDK_WINDOW_DESTROYED (window) &&
gdk_window_get_window_type (window) == GDK_WINDOW_FOREIGN)
{
gdk_x11_display_error_trap_push (GDK_WINDOW_DISPLAY (window));
if (add_filter)
{
gdk_window_set_events (window,
gdk_window_get_events (window) |
GDK_PROPERTY_CHANGE_MASK);
gdk_window_add_filter (window, xdnd_source_window_filter, context);
}
else
{
gdk_window_remove_filter (window,
xdnd_source_window_filter,
context);
/* Should we remove the GDK_PROPERTY_NOTIFY mask?
* but we might want it for other reasons. (Like
* INCR selection transactions).
*/
}
gdk_x11_display_error_trap_pop_ignored (GDK_WINDOW_DISPLAY (window));
}
}
static void
base_precache_atoms (GdkDisplay *display)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (!display_x11->base_dnd_atoms_precached)
{
static const char *const precache_atoms[] = {
"WM_STATE",
"XdndAware",
"XdndProxy"
};
_gdk_x11_precache_atoms (display,
precache_atoms, G_N_ELEMENTS (precache_atoms));
display_x11->base_dnd_atoms_precached = TRUE;
}
}
static void
xdnd_precache_atoms (GdkDisplay *display)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (!display_x11->xdnd_atoms_precached)
{
static const gchar *const precache_atoms[] = {
"XdndActionAsk",
"XdndActionCopy",
"XdndActionLink",
"XdndActionList",
"XdndActionMove",
"XdndActionPrivate",
"XdndDrop",
"XdndEnter",
"XdndFinished",
"XdndLeave",
"XdndPosition",
"XdndSelection",
"XdndStatus",
"XdndTypeList"
};
_gdk_x11_precache_atoms (display,
precache_atoms, G_N_ELEMENTS (precache_atoms));
display_x11->xdnd_atoms_precached = TRUE;
}
}
static GdkFilterReturn
xdnd_enter_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer cb_data)
{
GdkDisplay *display;
GdkX11Display *display_x11;
XEvent *xevent = (XEvent *)xev;
GdkDragContext *context;
GdkX11DragContext *context_x11;
GdkSeat *seat;
gint i;
Atom type;
int format;
gulong nitems, after;
guchar *data;
Atom *atoms;
guint32 source_window;
gboolean get_types;
gint version;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
source_window = xevent->xclient.data.l[0];
get_types = ((xevent->xclient.data.l[1] & 1) != 0);
version = (xevent->xclient.data.l[1] & 0xff000000) >> 24;
display = GDK_WINDOW_DISPLAY (event->any.window);
display_x11 = GDK_X11_DISPLAY (display);
xdnd_precache_atoms (display);
GDK_NOTE (DND,
g_message ("XdndEnter: source_window: %#x, version: %#x",
source_window, version));
if (version < 3)
{
/* Old source ignore */
GDK_NOTE (DND, g_message ("Ignored old XdndEnter message"));
return GDK_FILTER_REMOVE;
}
if (display_x11->current_dest_drag != NULL)
{
g_object_unref (display_x11->current_dest_drag);
display_x11->current_dest_drag = NULL;
}
context_x11 = (GdkX11DragContext *)g_object_new (GDK_TYPE_X11_DRAG_CONTEXT, NULL);
context = (GdkDragContext *)context_x11;
context->display = display;
context->protocol = GDK_DRAG_PROTO_XDND;
context_x11->version = version;
/* FIXME: Should extend DnD protocol to have device info */
seat = gdk_display_get_default_seat (display);
gdk_drag_context_set_device (context, gdk_seat_get_pointer (seat));
context->source_window = gdk_x11_window_foreign_new_for_display (display, source_window);
if (!context->source_window)
{
g_object_unref (context);
return GDK_FILTER_REMOVE;
}
context->dest_window = event->any.window;
g_object_ref (context->dest_window);
context->targets = NULL;
if (get_types)
{
gdk_x11_display_error_trap_push (display);
XGetWindowProperty (GDK_WINDOW_XDISPLAY (event->any.window),
source_window,
gdk_x11_get_xatom_by_name_for_display (display, "XdndTypeList"),
0, 65536,
False, XA_ATOM, &type, &format, &nitems,
&after, &data);
if (gdk_x11_display_error_trap_pop (display) || (format != 32) || (type != XA_ATOM))
{
g_object_unref (context);
if (data)
XFree (data);
return GDK_FILTER_REMOVE;
}
atoms = (Atom *)data;
for (i = 0; i < nitems; i++)
context->targets =
g_list_append (context->targets,
GDK_ATOM_TO_POINTER (gdk_x11_xatom_to_atom_for_display (display,
atoms[i])));
XFree (atoms);
}
else
{
for (i = 0; i < 3; i++)
if (xevent->xclient.data.l[2 + i])
context->targets =
g_list_append (context->targets,
GDK_ATOM_TO_POINTER (gdk_x11_xatom_to_atom_for_display (display,
xevent->xclient.data.l[2 + i])));
}
#ifdef G_ENABLE_DEBUG
if (GDK_DEBUG_CHECK (DND))
print_target_list (context->targets);
#endif /* G_ENABLE_DEBUG */
xdnd_manage_source_filter (context, context->source_window, TRUE);
xdnd_read_actions (context_x11);
event->dnd.type = GDK_DRAG_ENTER;
event->dnd.context = context;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
display_x11->current_dest_drag = context;
return GDK_FILTER_TRANSLATE;
}
static GdkFilterReturn
xdnd_leave_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint32 source_window = xevent->xclient.data.l[0];
GdkDisplay *display;
GdkX11Display *display_x11;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndLeave: source_window: %#x",
source_window));
display = GDK_WINDOW_DISPLAY (event->any.window);
display_x11 = GDK_X11_DISPLAY (display);
xdnd_precache_atoms (display);
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XID (display_x11->current_dest_drag->source_window) == source_window))
{
event->dnd.type = GDK_DRAG_LEAVE;
/* Pass ownership of context to the event */
event->dnd.context = display_x11->current_dest_drag;
gdk_event_set_device (event, gdk_drag_context_get_device (event->dnd.context));
display_x11->current_dest_drag = NULL;
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_position_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkWindowImplX11 *impl;
XEvent *xevent = (XEvent *)xev;
guint32 source_window = xevent->xclient.data.l[0];
gint16 x_root = xevent->xclient.data.l[2] >> 16;
gint16 y_root = xevent->xclient.data.l[2] & 0xffff;
guint32 time = xevent->xclient.data.l[3];
Atom action = xevent->xclient.data.l[4];
GdkDisplay *display;
GdkX11Display *display_x11;
GdkDragContext *context;
GdkX11DragContext *context_x11;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndPosition: source_window: %#x position: (%d, %d) time: %d action: %ld",
source_window, x_root, y_root, time, action));
display = GDK_WINDOW_DISPLAY (event->any.window);
display_x11 = GDK_X11_DISPLAY (display);
xdnd_precache_atoms (display);
context = display_x11->current_dest_drag;
if ((context != NULL) &&
(context->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XID (context->source_window) == source_window))
{
impl = GDK_WINDOW_IMPL_X11 (event->any.window->impl);
context_x11 = GDK_X11_DRAG_CONTEXT (context);
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.context = context;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = time;
context->suggested_action = xdnd_action_from_atom (display, action);
if (!context_x11->xdnd_have_actions)
context->actions = context->suggested_action;
event->dnd.x_root = x_root / impl->window_scale;
event->dnd.y_root = y_root / impl->window_scale;
context_x11->last_x = x_root / impl->window_scale;
context_x11->last_y = y_root / impl->window_scale;
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_drop_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint32 source_window = xevent->xclient.data.l[0];
guint32 time = xevent->xclient.data.l[2];
GdkDisplay *display;
GdkX11Display *display_x11;
GdkDragContext *context;
GdkX11DragContext *context_x11;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndDrop: source_window: %#x time: %d",
source_window, time));
display = GDK_WINDOW_DISPLAY (event->any.window);
display_x11 = GDK_X11_DISPLAY (display);
xdnd_precache_atoms (display);
context = display_x11->current_dest_drag;
if ((context != NULL) &&
(context->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XID (context->source_window) == source_window))
{
context_x11 = GDK_X11_DRAG_CONTEXT (context);
event->dnd.type = GDK_DROP_START;
event->dnd.context = context;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = time;
event->dnd.x_root = context_x11->last_x;
event->dnd.y_root = context_x11->last_y;
gdk_x11_window_set_user_time (event->any.window, time);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
GdkFilterReturn
_gdk_x11_dnd_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *) xev;
GdkDisplay *display;
int i;
if (!GDK_IS_X11_WINDOW (event->any.window))
return GDK_FILTER_CONTINUE;
if (xevent->type != ClientMessage)
return GDK_FILTER_CONTINUE;
display = GDK_WINDOW_DISPLAY (event->any.window);
for (i = 0; i < G_N_ELEMENTS (xdnd_filters); i++)
{
if (xevent->xclient.message_type != gdk_x11_get_xatom_by_name_for_display (display, xdnd_filters[i].atom_name))
continue;
return xdnd_filters[i].func (xev, event, data);
}
return GDK_FILTER_CONTINUE;
}
/* Source side */
static void
gdk_drag_do_leave (GdkX11DragContext *context_x11,
guint32 time)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (context_x11);
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_leave (context_x11);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_MOTIF:
case GDK_DRAG_PROTO_WIN32_DROPFILES:
case GDK_DRAG_PROTO_OLE2:
case GDK_DRAG_PROTO_LOCAL:
case GDK_DRAG_PROTO_WAYLAND:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static GdkWindow *
create_drag_window (GdkDisplay *display)
{
GdkWindow *window;
window = gdk_window_new_popup (display, 0, &(GdkRectangle) { 0, 0, 100, 100 });
gdk_window_set_type_hint (window, GDK_WINDOW_TYPE_HINT_DND);
return window;
}
GdkDragContext *
_gdk_x11_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GList *targets,
gint x_root,
gint y_root)
{
GdkDragContext *context;
context = (GdkDragContext *) g_object_new (GDK_TYPE_X11_DRAG_CONTEXT, NULL);
context->display = gdk_window_get_display (window);
context->is_source = TRUE;
context->source_window = window;
g_object_ref (window);
context->targets = g_list_copy (targets);
precache_target_list (context);
context->actions = 0;
gdk_drag_context_set_device (context, device);
GDK_X11_DRAG_CONTEXT (context)->start_x = x_root;
GDK_X11_DRAG_CONTEXT (context)->start_y = y_root;
GDK_X11_DRAG_CONTEXT (context)->last_x = x_root;
GDK_X11_DRAG_CONTEXT (context)->last_y = y_root;
GDK_X11_DRAG_CONTEXT (context)->drag_window = create_drag_window (gdk_window_get_display(window));
return context;
}
Window
_gdk_x11_display_get_drag_protocol (GdkDisplay *display,
Window xid,
GdkDragProtocol *protocol,
guint *version)
{
GdkWindow *window;
Window retval;
base_precache_atoms (display);
/* Check for a local drag */
window = gdk_x11_window_lookup_for_display (display, xid);
if (window && gdk_window_get_window_type (window) != GDK_WINDOW_FOREIGN)
{
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
{
*protocol = GDK_DRAG_PROTO_XDND;
*version = 5;
xdnd_precache_atoms (display);
GDK_NOTE (DND, g_message ("Entering local Xdnd window %#x\n", (guint) xid));
return xid;
}
else if (_gdk_x11_display_is_root_window (display, xid))
{
*protocol = GDK_DRAG_PROTO_ROOTWIN;
GDK_NOTE (DND, g_message ("Entering root window\n"));
return xid;
}
}
else if ((retval = xdnd_check_dest (display, xid, version)))
{
*protocol = GDK_DRAG_PROTO_XDND;
xdnd_precache_atoms (display);
GDK_NOTE (DND, g_message ("Entering Xdnd window %#x\n", (guint) xid));
return retval;
}
else
{
/* Check if this is a root window */
gboolean rootwin = FALSE;
if (_gdk_x11_display_is_root_window (display, (Window) xid))
rootwin = TRUE;
if (rootwin)
{
GDK_NOTE (DND, g_message ("Entering root window\n"));
*protocol = GDK_DRAG_PROTO_ROOTWIN;
return xid;
}
}
*protocol = GDK_DRAG_PROTO_NONE;
return 0; /* a.k.a. None */
}
static GdkWindowCache *
drag_context_find_window_cache (GdkX11DragContext *context_x11,
GdkScreen *screen)
{
GSList *list;
GdkWindowCache *cache;
for (list = context_x11->window_caches; list; list = list->next)
{
cache = list->data;
if (cache->screen == screen)
return cache;
}
cache = gdk_window_cache_get (screen);
context_x11->window_caches = g_slist_prepend (context_x11->window_caches, cache);
return cache;
}
static GdkWindow *
gdk_x11_drag_context_find_window (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkDragProtocol *protocol)
{
GdkX11Screen *screen_x11 = GDK_X11_SCREEN(screen);
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
GdkWindowCache *window_cache;
GdkDisplay *display;
Window dest;
GdkWindow *dest_window;
display = GDK_WINDOW_DISPLAY (context->source_window);
window_cache = drag_context_find_window_cache (context_x11, screen);
dest = get_client_window_at_coords (window_cache,
drag_window && GDK_WINDOW_IS_X11 (drag_window) ?
GDK_WINDOW_XID (drag_window) : None,
x_root * screen_x11->window_scale,
y_root * screen_x11->window_scale);
if (context_x11->dest_xid != dest)
{
Window recipient;
context_x11->dest_xid = dest;
/* Check if new destination accepts drags, and which protocol */
/* There is some ugliness here. We actually need to pass
* _three_ pieces of information to drag_motion - dest_window,
* protocol, and the XID of the unproxied window. The first
* two are passed explicitly, the third implicitly through
* protocol->dest_xid.
*/
recipient = _gdk_x11_display_get_drag_protocol (display,
dest,
protocol,
&context_x11->version);
if (recipient != None)
dest_window = gdk_x11_window_foreign_new_for_display (display, recipient);
else
dest_window = NULL;
}
else
{
dest_window = context->dest_window;
if (dest_window)
g_object_ref (dest_window);
*protocol = context->protocol;
}
return dest_window;
}
static void
move_drag_window (GdkDragContext *context,
guint x_root,
guint y_root)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
gdk_window_move (context_x11->drag_window,
x_root - context_x11->hot_x,
y_root - context_x11->hot_y);
gdk_window_raise (context_x11->drag_window);
}
static gboolean
gdk_x11_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)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
GdkWindowImplX11 *impl;
if (context_x11->drag_window)
move_drag_window (context, x_root, y_root);
context_x11->old_actions = context->actions;
context->actions = possible_actions;
if (context_x11->old_actions != possible_actions)
context_x11->xdnd_actions_set = FALSE;
if (protocol == GDK_DRAG_PROTO_XDND && context_x11->version == 0)
{
/* This ugly hack is necessary since GTK+ doesn't know about
* the XDND protocol version, and in particular doesn't know
* that gdk_drag_find_window_for_screen() has the side-effect
* of setting context_x11->version, and therefore sometimes call
* gdk_drag_motion() without a prior call to
* gdk_drag_find_window_for_screen(). This happens, e.g.
* when GTK+ is proxying DND events to embedded windows.
*/
if (dest_window)
{
GdkDisplay *display = GDK_WINDOW_DISPLAY (dest_window);
xdnd_check_dest (display,
GDK_WINDOW_XID (dest_window),
&context_x11->version);
}
}
/* When we have a Xdnd target, make sure our XdndActionList
* matches the current actions;
*/
if (protocol == GDK_DRAG_PROTO_XDND && !context_x11->xdnd_actions_set)
{
if (dest_window)
{
if (gdk_window_get_window_type (dest_window) == GDK_WINDOW_FOREIGN)
xdnd_set_actions (context_x11);
else if (context->dest_window == dest_window)
{
GdkDisplay *display = GDK_WINDOW_DISPLAY (dest_window);
GdkDragContext *dest_context;
dest_context = gdk_drag_context_find (display, FALSE,
GDK_WINDOW_XID (context->source_window),
GDK_WINDOW_XID (dest_window));
if (dest_context)
{
dest_context->actions = context->actions;
GDK_X11_DRAG_CONTEXT (dest_context)->xdnd_have_actions = TRUE;
}
}
}
}
if (context->dest_window != dest_window)
{
GdkEvent *temp_event;
/* Send a leave to the last destination */
gdk_drag_do_leave (context_x11, time);
context_x11->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (dest_window)
{
context->dest_window = dest_window;
context_x11->drop_xid = context_x11->dest_xid;
g_object_ref (context->dest_window);
context->protocol = protocol;
switch (protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_enter (context_x11);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_MOTIF:
case GDK_DRAG_PROTO_WIN32_DROPFILES:
case GDK_DRAG_PROTO_OLE2:
case GDK_DRAG_PROTO_LOCAL:
case GDK_DRAG_PROTO_WAYLAND:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
context_x11->old_action = suggested_action;
context->suggested_action = suggested_action;
context_x11->old_actions = possible_actions;
}
else
{
context->dest_window = NULL;
context_x11->drop_xid = None;
context->action = 0;
}
/* Push a status event, to let the client know that
* the drag changed
*/
temp_event = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
temp_event->dnd.send_event = TRUE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = time;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
else
{
context_x11->old_action = context->suggested_action;
context->suggested_action = suggested_action;
}
/* Send a drag-motion event */
context_x11->last_x = x_root;
context_x11->last_y = y_root;
if (context->dest_window)
{
impl = GDK_WINDOW_IMPL_X11 (context->dest_window->impl);
if (context_x11->drag_status == GDK_DRAG_STATUS_DRAG)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_motion (context_x11, x_root * impl->window_scale, y_root * impl->window_scale, suggested_action, time);
break;
case GDK_DRAG_PROTO_ROOTWIN:
{
GdkEvent *temp_event;
/* GTK+ traditionally has used application/x-rootwin-drop,
* but the XDND spec specifies x-rootwindow-drop.
*/
GdkAtom target1 = gdk_atom_intern_static_string ("application/x-rootwindow-drop");
GdkAtom target2 = gdk_atom_intern_static_string ("application/x-rootwin-drop");
if (g_list_find (context->targets,
GDK_ATOM_TO_POINTER (target1)) ||
g_list_find (context->targets,
GDK_ATOM_TO_POINTER (target2)))
context->action = context->suggested_action;
else
context->action = 0;
temp_event = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
temp_event->dnd.send_event = FALSE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = time;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
break;
case GDK_DRAG_PROTO_MOTIF:
case GDK_DRAG_PROTO_WIN32_DROPFILES:
case GDK_DRAG_PROTO_OLE2:
case GDK_DRAG_PROTO_LOCAL:
case GDK_DRAG_PROTO_WAYLAND:
case GDK_DRAG_PROTO_NONE:
g_warning ("Invalid drag protocol %u in gdk_drag_motion()", context->protocol);
break;
default:
break;
}
}
else
return TRUE;
}
return FALSE;
}
static void
gdk_x11_drag_context_drag_abort (GdkDragContext *context,
guint32 time)
{
gdk_drag_do_leave (GDK_X11_DRAG_CONTEXT (context), time);
}
static void
gdk_x11_drag_context_drag_drop (GdkDragContext *context,
guint32 time)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_drop (context_x11, time);
break;
case GDK_DRAG_PROTO_ROOTWIN:
g_warning ("Drops for GDK_DRAG_PROTO_ROOTWIN must be handled internally");
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_drop()");
break;
case GDK_DRAG_PROTO_MOTIF:
case GDK_DRAG_PROTO_WIN32_DROPFILES:
case GDK_DRAG_PROTO_OLE2:
case GDK_DRAG_PROTO_LOCAL:
case GDK_DRAG_PROTO_WAYLAND:
default:
g_warning ("Drag protocol %u is not valid in gdk_drag_drop()", context->protocol);
break;
}
}
}
/* Destination side */
static void
gdk_x11_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time_)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
XEvent xev;
GdkDisplay *display;
display = GDK_WINDOW_DISPLAY (context->source_window);
context->action = action;
if (context->protocol == GDK_DRAG_PROTO_XDND)
{
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndStatus");
xev.xclient.format = 32;
xev.xclient.window = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->dest_window);
xev.xclient.data.l[1] = (action != 0) ? (2 | 1) : 0;
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = xdnd_action_to_atom (display, action);
if (!xdnd_send_xevent (context_x11, context->source_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->source_window)));
}
}
context_x11->old_action = action;
}
static void
gdk_x11_drag_context_drop_reply (GdkDragContext *context,
gboolean accepted,
guint32 time_)
{
}
static void
gdk_x11_drag_context_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
if (context->protocol == GDK_DRAG_PROTO_XDND)
{
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndFinished");
xev.xclient.format = 32;
xev.xclient.window = GDK_WINDOW_XID (context->source_window);
xev.xclient.data.l[0] = GDK_WINDOW_XID (context->dest_window);
if (success)
{
xev.xclient.data.l[1] = 1;
xev.xclient.data.l[2] = xdnd_action_to_atom (display,
context->action);
}
else
{
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = None;
}
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
if (!xdnd_send_xevent (GDK_X11_DRAG_CONTEXT (context), context->source_window, FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XID (context->source_window)));
}
}
}
void
_gdk_x11_window_register_dnd (GdkWindow *window)
{
static const gulong xdnd_version = 5;
GdkDisplay *display = gdk_window_get_display (window);
g_return_if_fail (window != NULL);
base_precache_atoms (display);
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
return;
else
g_object_set_data (G_OBJECT (window), "gdk-dnd-registered", GINT_TO_POINTER (TRUE));
/* Set XdndAware */
/* The property needs to be of type XA_ATOM, not XA_INTEGER. Blech */
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_WINDOW_XID (window),
gdk_x11_get_xatom_by_name_for_display (display, "XdndAware"),
XA_ATOM, 32, PropModeReplace,
(guchar *)&xdnd_version, 1);
}
static GdkAtom
gdk_x11_drag_context_get_selection (GdkDragContext *context)
{
if (context->protocol == GDK_DRAG_PROTO_XDND)
return gdk_atom_intern_static_string ("XdndSelection");
else
return GDK_NONE;
}
static gboolean
gdk_x11_drag_context_drop_status (GdkDragContext *context)
{
return ! GDK_X11_DRAG_CONTEXT (context)->drop_failed;
}
static GdkWindow *
gdk_x11_drag_context_get_drag_window (GdkDragContext *context)
{
return GDK_X11_DRAG_CONTEXT (context)->drag_window;
}
static void
gdk_x11_drag_context_set_hotspot (GdkDragContext *context,
gint hot_x,
gint hot_y)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
x11_context->hot_x = hot_x;
x11_context->hot_y = hot_y;
if (x11_context->grab_seat)
{
/* DnD is managed, update current position */
move_drag_window (context, x11_context->last_x, x11_context->last_y);
}
}
static double
ease_out_cubic (double t)
{
double p = t - 1;
return p * p * p + 1;
}
#define ANIM_TIME 500000 /* half a second */
typedef struct _GdkDragAnim GdkDragAnim;
struct _GdkDragAnim {
GdkX11DragContext *context;
GdkFrameClock *frame_clock;
gint64 start_time;
};
static void
gdk_drag_anim_destroy (GdkDragAnim *anim)
{
g_object_unref (anim->context);
g_slice_free (GdkDragAnim, anim);
}
static gboolean
gdk_drag_anim_timeout (gpointer data)
{
GdkDragAnim *anim = data;
GdkX11DragContext *context = anim->context;
GdkFrameClock *frame_clock = anim->frame_clock;
gint64 current_time;
double f;
double t;
if (!frame_clock)
return G_SOURCE_REMOVE;
current_time = gdk_frame_clock_get_frame_time (frame_clock);
f = (current_time - anim->start_time) / (double) ANIM_TIME;
if (f >= 1.0)
return G_SOURCE_REMOVE;
t = ease_out_cubic (f);
gdk_window_show (context->drag_window);
gdk_window_move (context->drag_window,
context->last_x + (context->start_x - context->last_x) * t,
context->last_y + (context->start_y - context->last_y) * t);
gdk_window_set_opacity (context->drag_window, 1.0 - f);
return G_SOURCE_CONTINUE;
}
static void
gdk_x11_drag_context_drop_done (GdkDragContext *context,
gboolean success)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkDragAnim *anim;
cairo_surface_t *win_surface;
cairo_surface_t *surface;
cairo_t *cr;
guint id;
if (success)
{
gdk_window_hide (x11_context->drag_window);
return;
}
win_surface = _gdk_window_ref_cairo_surface (x11_context->drag_window);
surface = gdk_window_create_similar_surface (x11_context->drag_window,
cairo_surface_get_content (win_surface),
gdk_window_get_width (x11_context->drag_window),
gdk_window_get_height (x11_context->drag_window));
cr = cairo_create (surface);
cairo_set_source_surface (cr, win_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (win_surface);
/*
pattern = cairo_pattern_create_for_surface (surface);
gdk_window_set_background_pattern (x11_context->drag_window, pattern);
cairo_pattern_destroy (pattern);
*/
cairo_surface_destroy (surface);
anim = g_slice_new0 (GdkDragAnim);
anim->context = g_object_ref (x11_context);
anim->frame_clock = gdk_window_get_frame_clock (x11_context->drag_window);
anim->start_time = gdk_frame_clock_get_frame_time (anim->frame_clock);
id = gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 17,
gdk_drag_anim_timeout, anim,
(GDestroyNotify) gdk_drag_anim_destroy);
g_source_set_name_by_id (id, "[gtk+] gdk_drag_anim_timeout");
}
static gboolean
drag_context_grab (GdkDragContext *context)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkDevice *device = gdk_drag_context_get_device (context);
GdkSeatCapabilities capabilities;
GdkWindow *root;
GdkSeat *seat;
gint keycode, i;
GdkCursor *cursor;
if (!x11_context->ipc_window)
return FALSE;
root = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
seat = gdk_device_get_seat (gdk_drag_context_get_device (context));
#ifdef XINPUT_2
if (GDK_IS_X11_DEVICE_XI2 (device))
capabilities = GDK_SEAT_CAPABILITY_ALL_POINTING;
else
#endif
capabilities = GDK_SEAT_CAPABILITY_ALL;
cursor = gdk_drag_get_cursor (context, x11_context->current_action);
g_set_object (&x11_context->cursor, cursor);
if (gdk_seat_grab (seat, x11_context->ipc_window,
capabilities, FALSE,
x11_context->cursor, NULL, NULL, NULL) != GDK_GRAB_SUCCESS)
return FALSE;
g_set_object (&x11_context->grab_seat, seat);
gdk_error_trap_push ();
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
{
keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
grab_keys[i].keysym);
if (keycode == NoSymbol)
continue;
#ifdef XINPUT_2
if (GDK_IS_X11_DEVICE_XI2 (device))
{
gint deviceid = gdk_x11_device_get_id (gdk_seat_get_keyboard (seat));
unsigned char mask[XIMaskLen(XI_LASTEVENT)];
XIGrabModifiers mods;
XIEventMask evmask;
gint num_mods;
memset (mask, 0, sizeof (mask));
XISetMask (mask, XI_KeyPress);
XISetMask (mask, XI_KeyRelease);
evmask.deviceid = deviceid;
evmask.mask_len = sizeof (mask);
evmask.mask = mask;
num_mods = 1;
mods.modifiers = grab_keys[i].modifiers;
XIGrabKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
deviceid,
keycode,
GDK_WINDOW_XID (root),
GrabModeAsync,
GrabModeAsync,
False,
&evmask,
num_mods,
&mods);
}
else
#endif
{
XGrabKey (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
keycode, grab_keys[i].modifiers,
GDK_WINDOW_XID (root),
FALSE,
GrabModeAsync,
GrabModeAsync);
}
}
return TRUE;
}
static void
drag_context_ungrab (GdkDragContext *context)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkDevice *keyboard;
GdkWindow *root;
gint keycode, i;
if (!x11_context->grab_seat)
return;
gdk_seat_ungrab (x11_context->grab_seat);
keyboard = gdk_seat_get_keyboard (x11_context->grab_seat);
root = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
g_clear_object (&x11_context->grab_seat);
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
{
keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
grab_keys[i].keysym);
if (keycode == NoSymbol)
continue;
#ifdef XINPUT_2
if (GDK_IS_X11_DEVICE_XI2 (keyboard))
{
XIGrabModifiers mods;
gint num_mods;
num_mods = 1;
mods.modifiers = grab_keys[i].modifiers;
XIUngrabKeycode (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
gdk_x11_device_get_id (keyboard),
keycode,
GDK_WINDOW_XID (root),
num_mods,
&mods);
}
else
#endif /* XINPUT_2 */
{
XUngrabKey (GDK_WINDOW_XDISPLAY (x11_context->ipc_window),
keycode, grab_keys[i].modifiers,
GDK_WINDOW_XID (root));
}
}
}
static gboolean
gdk_x11_drag_context_manage_dnd (GdkDragContext *context,
GdkWindow *ipc_window,
GdkDragAction actions)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
if (x11_context->ipc_window)
return FALSE;
context->protocol = GDK_DRAG_PROTO_XDND;
x11_context->ipc_window = g_object_ref (ipc_window);
if (drag_context_grab (context))
{
x11_context->actions = actions;
move_drag_window (context, x11_context->start_x, x11_context->start_y);
return TRUE;
}
else
{
g_clear_object (&x11_context->ipc_window);
return FALSE;
}
}
static void
gdk_x11_drag_context_set_cursor (GdkDragContext *context,
GdkCursor *cursor)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
if (!g_set_object (&x11_context->cursor, cursor))
return;
if (x11_context->grab_seat)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gdk_device_grab (gdk_seat_get_pointer (x11_context->grab_seat),
x11_context->ipc_window,
GDK_OWNERSHIP_APPLICATION, FALSE,
GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
cursor, GDK_CURRENT_TIME);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static void
gdk_x11_drag_context_cancel (GdkDragContext *context,
GdkDragCancelReason reason)
{
drag_context_ungrab (context);
gdk_drag_drop_done (context, FALSE);
}
static void
gdk_x11_drag_context_drop_performed (GdkDragContext *context,
guint32 time_)
{
gdk_drag_drop (context, time_);
drag_context_ungrab (context);
}
#define BIG_STEP 20
#define SMALL_STEP 1
static void
gdk_drag_get_current_actions (GdkModifierType state,
gint button,
GdkDragAction actions,
GdkDragAction *suggested_action,
GdkDragAction *possible_actions)
{
*suggested_action = 0;
*possible_actions = 0;
if ((button == GDK_BUTTON_MIDDLE || button == GDK_BUTTON_SECONDARY) && (actions & GDK_ACTION_ASK))
{
*suggested_action = GDK_ACTION_ASK;
*possible_actions = actions;
}
else if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
{
if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
{
if (actions & GDK_ACTION_LINK)
{
*suggested_action = GDK_ACTION_LINK;
*possible_actions = GDK_ACTION_LINK;
}
}
else if (state & GDK_CONTROL_MASK)
{
if (actions & GDK_ACTION_COPY)
{
*suggested_action = GDK_ACTION_COPY;
*possible_actions = GDK_ACTION_COPY;
}
}
else
{
if (actions & GDK_ACTION_MOVE)
{
*suggested_action = GDK_ACTION_MOVE;
*possible_actions = GDK_ACTION_MOVE;
}
}
}
else
{
*possible_actions = actions;
if ((state & (GDK_MOD1_MASK)) && (actions & GDK_ACTION_ASK))
*suggested_action = GDK_ACTION_ASK;
else if (actions & GDK_ACTION_COPY)
*suggested_action = GDK_ACTION_COPY;
else if (actions & GDK_ACTION_MOVE)
*suggested_action = GDK_ACTION_MOVE;
else if (actions & GDK_ACTION_LINK)
*suggested_action = GDK_ACTION_LINK;
}
}
static void
gdk_drag_update (GdkDragContext *context,
gdouble x_root,
gdouble y_root,
GdkModifierType mods,
guint32 evtime)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkDragAction action, possible_actions;
GdkWindow *dest_window;
GdkDragProtocol protocol;
gdk_drag_get_current_actions (mods, GDK_BUTTON_PRIMARY, x11_context->actions,
&action, &possible_actions);
gdk_drag_find_window_for_screen (context,
x11_context->drag_window,
gdk_display_get_default_screen (gdk_display_get_default ()),
x_root, y_root, &dest_window, &protocol);
gdk_drag_motion (context, dest_window, protocol, x_root, y_root,
action, possible_actions, evtime);
}
static gboolean
gdk_dnd_handle_motion_event (GdkDragContext *context,
const GdkEventMotion *event)
{
GdkModifierType state;
if (!gdk_event_get_state ((GdkEvent *) event, &state))
return FALSE;
gdk_drag_update (context, event->x_root, event->y_root, state,
gdk_event_get_time ((GdkEvent *) event));
return TRUE;
}
static gboolean
gdk_dnd_handle_key_event (GdkDragContext *context,
const GdkEventKey *event)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
GdkModifierType state;
GdkWindow *root_window;
GdkDevice *pointer;
gint dx, dy;
dx = dy = 0;
state = event->state;
pointer = gdk_device_get_associated_device (gdk_event_get_device ((GdkEvent *) event));
if (event->type == GDK_KEY_PRESS)
{
switch (event->keyval)
{
case GDK_KEY_Escape:
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_USER_CANCELLED);
return TRUE;
case GDK_KEY_space:
case GDK_KEY_Return:
case GDK_KEY_ISO_Enter:
case GDK_KEY_KP_Enter:
case GDK_KEY_KP_Space:
if ((gdk_drag_context_get_selected_action (context) != 0) &&
(gdk_drag_context_get_dest_window (context) != NULL))
{
g_signal_emit_by_name (context, "drop-performed",
gdk_event_get_time ((GdkEvent *) event));
}
else
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
case GDK_KEY_Up:
case GDK_KEY_KP_Up:
dy = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Down:
case GDK_KEY_KP_Down:
dy = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
break;
case GDK_KEY_Left:
case GDK_KEY_KP_Left:
dx = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Right:
case GDK_KEY_KP_Right:
dx = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
break;
default:
break;
}
}
/* The state is not yet updated in the event, so we need
* to query it here. We could use XGetModifierMapping, but
* that would be overkill.
*/
root_window = gdk_screen_get_root_window (gdk_window_get_screen (x11_context->ipc_window));
gdk_window_get_device_position (root_window, pointer, NULL, NULL, &state);
if (dx != 0 || dy != 0)
{
x11_context->last_x += dx;
x11_context->last_y += dy;
gdk_device_warp (pointer,
gdk_window_get_screen (x11_context->ipc_window),
x11_context->last_x, x11_context->last_y);
}
gdk_drag_update (context, x11_context->last_x, x11_context->last_y, state,
gdk_event_get_time ((GdkEvent *) event));
return TRUE;
}
static gboolean
gdk_dnd_handle_grab_broken_event (GdkDragContext *context,
const GdkEventGrabBroken *event)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
/* Don't cancel if we break the implicit grab from the initial button_press.
* Also, don't cancel if we re-grab on the widget or on our IPC window, for
* example, when changing the drag cursor.
*/
if (event->implicit ||
event->grab_window == x11_context->drag_window ||
event->grab_window == x11_context->ipc_window)
return FALSE;
if (gdk_event_get_device ((GdkEvent *) event) !=
gdk_drag_context_get_device (context))
return FALSE;
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_ERROR);
return TRUE;
}
static gboolean
gdk_dnd_handle_button_event (GdkDragContext *context,
const GdkEventButton *event)
{
#if 0
/* FIXME: Check the button matches */
if (event->button != x11_context->button)
return FALSE;
#endif
if ((gdk_drag_context_get_selected_action (context) != 0) &&
(gdk_drag_context_get_dest_window (context) != NULL))
{
g_signal_emit_by_name (context, "drop-performed",
gdk_event_get_time ((GdkEvent *) event));
}
else
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
}
static gboolean
gdk_dnd_handle_drag_status (GdkDragContext *context,
const GdkEventDND *event)
{
GdkX11DragContext *context_x11 = GDK_X11_DRAG_CONTEXT (context);
GdkDragAction action;
if (context != event->context)
return FALSE;
action = gdk_drag_context_get_selected_action (context);
if (action != context_x11->current_action)
{
context_x11->current_action = action;
g_signal_emit_by_name (context, "action-changed", action);
}
return TRUE;
}
static gboolean
gdk_dnd_handle_drop_finished (GdkDragContext *context,
const GdkEventDND *event)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
if (context != event->context)
return FALSE;
g_signal_emit_by_name (context, "dnd-finished");
gdk_drag_drop_done (context, !x11_context->drop_failed);
return TRUE;
}
gboolean
gdk_x11_drag_context_handle_event (GdkDragContext *context,
const GdkEvent *event)
{
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (context);
if (!context->is_source)
return FALSE;
if (!x11_context->grab_seat && event->type != GDK_DROP_FINISHED)
return FALSE;
switch ((guint) event->type)
{
case GDK_MOTION_NOTIFY:
return gdk_dnd_handle_motion_event (context, &event->motion);
case GDK_BUTTON_RELEASE:
return gdk_dnd_handle_button_event (context, &event->button);
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
return gdk_dnd_handle_key_event (context, &event->key);
case GDK_GRAB_BROKEN:
return gdk_dnd_handle_grab_broken_event (context, &event->grab_broken);
case GDK_DRAG_STATUS:
return gdk_dnd_handle_drag_status (context, &event->dnd);
case GDK_DROP_FINISHED:
return gdk_dnd_handle_drop_finished (context, &event->dnd);
default:
break;
}
return FALSE;
}
void
gdk_x11_drag_context_action_changed (GdkDragContext *context,
GdkDragAction action)
{
GdkCursor *cursor;
cursor = gdk_drag_get_cursor (context, action);
gdk_drag_context_set_cursor (context, cursor);
}
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