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gtk/gdk/x11/gdkdnd-x11.c
Alexander Larsson 525e5cff04 x11: Initial cut at supporting window scaling for X11 
If you set GDK_SCALE=2 in the environment then all windows will be
scaled by 2. Its not an ideal solution as it doesn't handle
multi-monitors at different scales, and only affects gtk apps.
But it is a good starting points and will help a lot on HiDPI
laptops.
2013-07-03 14:34:14 +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;
guint ref_count;
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;
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;
};
/* 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);
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 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;
}
static void
gdk_x11_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
GdkX11DragContext *x11_context = GDK_X11_DRAG_CONTEXT (object);
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);
G_OBJECT_CLASS (gdk_x11_drag_context_parent_class)->finalize (object);
}
/* 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_screen_is_composited (screen))
{
cow = XCompositeGetOverlayWindow (xdisplay, GDK_WINDOW_XID (root_window));
gdk_window_cache_add (result, cow, 0, 0,
gdk_screen_get_width (screen) * GDK_X11_SCREEN(screen)->window_scale,
gdk_screen_get_height (screen) * 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!\n"));
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\n", 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\n", 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_flags & GDK_DEBUG_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)
{
GdkDeviceManager *device_manager;
GdkDisplay *display;
GdkX11Display *display_x11;
XEvent *xevent = (XEvent *)xev;
GdkDragContext *context;
GdkX11DragContext *context_x11;
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->protocol = GDK_DRAG_PROTO_XDND;
context_x11->version = version;
/* FIXME: Should extend DnD protocol to have device info */
device_manager = gdk_display_get_device_manager (display);
gdk_drag_context_set_device (context, gdk_device_manager_get_client_pointer (device_manager));
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_flags & GDK_DEBUG_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_NONE:
default:
break;
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
_gdk_x11_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GList *targets)
{
GdkDragContext *context;
context = (GdkDragContext *) g_object_new (GDK_TYPE_X11_DRAG_CONTEXT, NULL);
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);
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 explicitely, 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 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;
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_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_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()");
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;
default:
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);
if (gdk_window_get_window_type (window) == GDK_WINDOW_OFFSCREEN)
return;
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;
}
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