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gtk/gdk/x11/gdkdnd-x11.c
Alexander Larsson eabac453e6 Initial client-side-windows work 
The history before this was kind of twisted as several different
approaches were tested, so that was all squashed into this initial
commit to hide the uninteresting changes and files that were later
removed.
2009-04-02 10:14:01 +02:00

3835 lines
103 KiB
C
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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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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 <X11/Xlib.h>
#include <X11/Xatom.h>
#include <string.h>
#include "gdk.h" /* For gdk_flush() */
#include "gdkx.h"
#include "gdkasync.h"
#include "gdkdnd.h"
#include "gdkproperty.h"
#include "gdkprivate-x11.h"
#include "gdkinternals.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkalias.h"
typedef struct _GdkDragContextPrivateX11 GdkDragContextPrivateX11;
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;
} GdkCacheChild;
typedef struct {
GList *children;
GHashTable *child_hash;
guint old_event_mask;
GdkScreen *screen;
} GdkWindowCache;
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivateX11 {
GdkDragContext context;
Atom motif_selection;
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 */
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 motif_targets_set : 1; /* Whether we've already set motif initiator info */
guint drag_status : 4; /* current status of drag */
guint drop_failed : 1; /* Whether the drop was unsuccessful */
guint version; /* Xdnd protocol version */
GSList *window_caches;
};
#define PRIVATE_DATA(context) ((GdkDragContextPrivateX11 *) GDK_DRAG_CONTEXT (context)->windowing_data)
/* Forward declarations */
static void gdk_window_cache_destroy (GdkWindowCache *cache);
static void motif_read_target_table (GdkDisplay *display);
static GdkFilterReturn motif_dnd_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data);
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 void gdk_drag_context_finalize (GObject *object);
static GList *contexts;
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 (GdkDragContext, gdk_drag_context, G_TYPE_OBJECT)
static void
gdk_drag_context_init (GdkDragContext *dragcontext)
{
GdkDragContextPrivateX11 *private;
private = G_TYPE_INSTANCE_GET_PRIVATE (dragcontext,
GDK_TYPE_DRAG_CONTEXT,
GdkDragContextPrivateX11);
dragcontext->windowing_data = private;
contexts = g_list_prepend (contexts, dragcontext);
}
static void
gdk_drag_context_class_init (GdkDragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_drag_context_finalize;
g_type_class_add_private (object_class, sizeof (GdkDragContextPrivateX11));
}
static void
gdk_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GSList *tmp_list;
g_list_free (context->targets);
if (context->source_window)
{
if ((context->protocol == GDK_DRAG_PROTO_XDND) &&
!context->is_source)
xdnd_manage_source_filter (context, context->source_window, FALSE);
g_object_unref (context->source_window);
}
if (context->dest_window)
g_object_unref (context->dest_window);
for (tmp_list = private->window_caches; tmp_list; tmp_list = tmp_list->next)
gdk_window_cache_destroy (tmp_list->data);
g_slist_free (private->window_caches);
contexts = g_list_remove (contexts, context);
G_OBJECT_CLASS (gdk_drag_context_parent_class)->finalize (object);
}
/* Drag Contexts */
/**
* gdk_drag_context_new:
*
* Creates a new #GdkDragContext.
*
* Return value: the newly created #GdkDragContext.
**/
GdkDragContext *
gdk_drag_context_new (void)
{
return g_object_new (GDK_TYPE_DRAG_CONTEXT, NULL);
}
/**
* gdk_drag_context_ref:
* @context: a #GdkDragContext.
*
* Deprecated function; use g_object_ref() instead.
**/
void
gdk_drag_context_ref (GdkDragContext *context)
{
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_object_ref (context);
}
/**
* gdk_drag_context_unref:
* @context: a #GdkDragContext.
*
* Deprecated function; use g_object_unref() instead.
**/
void
gdk_drag_context_unref (GdkDragContext *context)
{
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_object_unref (context);
}
static GdkDragContext *
gdk_drag_context_find (GdkDisplay *display,
gboolean is_source,
Window source_xid,
Window dest_xid)
{
GList *tmp_list = contexts;
GdkDragContext *context;
GdkDragContextPrivateX11 *private;
Window context_dest_xid;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
private = PRIVATE_DATA (context);
if ((context->source_window && gdk_drawable_get_display (context->source_window) != display) ||
(context->dest_window && gdk_drawable_get_display (context->dest_window) != display))
continue;
context_dest_xid = context->dest_window ?
(private->drop_xid ?
private->drop_xid :
GDK_DRAWABLE_XID (context->dest_window)) :
None;
if ((!context->is_source == !is_source) &&
((source_xid == None) || (context->source_window &&
(GDK_DRAWABLE_XID (context->source_window) == source_xid))) &&
((dest_xid == None) || (context_dest_xid == dest_xid)))
return context;
tmp_list = tmp_list->next;
}
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
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;
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_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)
{
g_hash_table_remove (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
cache->children = g_list_remove_link (cache->children, node);
g_free (node->data);
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;
GdkWindowCache *result = g_new (GdkWindowCache, 1);
result->children = NULL;
result->child_hash = g_hash_table_new (g_direct_hash, NULL);
result->screen = screen;
XGetWindowAttributes (xdisplay, GDK_WINDOW_XWINDOW (root_window), &xwa);
result->old_event_mask = xwa.your_event_mask;
if (G_UNLIKELY (!GDK_DISPLAY_X11 (GDK_SCREEN_X11 (screen)->display)->trusted_client))
{
GList *toplevel_windows, *list;
GdkWindow *window;
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);
gdk_window_get_geometry (window, &x, &y, &width, &height, NULL);
gdk_window_cache_add (result, GDK_WINDOW_XID (window),
x, y, width, height,
gdk_window_is_visible (window));
}
g_list_free (toplevel_windows);
return result;
}
XSelectInput (xdisplay, GDK_WINDOW_XWINDOW (root_window),
result->old_event_mask | SubstructureNotifyMask);
gdk_window_add_filter (root_window, gdk_window_cache_filter, result);
if (!_gdk_x11_get_window_child_info (gdk_screen_get_display (screen),
GDK_WINDOW_XWINDOW (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);
return result;
}
static void
gdk_window_cache_destroy (GdkWindowCache *cache)
{
GdkWindow *root_window = gdk_screen_get_root_window (cache->screen);
XSelectInput (GDK_WINDOW_XDISPLAY (root_window),
GDK_WINDOW_XWINDOW (root_window),
cache->old_event_mask);
gdk_window_remove_filter (root_window, gdk_window_cache_filter, cache);
g_list_foreach (cache->children, (GFunc)g_free, NULL);
g_list_free (cache->children);
g_hash_table_destroy (cache->child_hash);
g_free (cache);
}
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;
gdk_error_trap_push ();
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))
{
retval = get_client_window_at_coords_recurse (gdk_screen_get_display (cache->screen),
child->xid, TRUE,
x_root - child->x,
y_root - child->y);
if (!retval)
retval = child->xid;
}
}
tmp_list = tmp_list->next;
}
gdk_error_trap_pop ();
if (retval)
return retval;
else
return GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (cache->screen));
}
/*************************************************************
***************************** MOTIF *************************
*************************************************************/
/* values used in the message type for Motif DND */
enum {
XmTOP_LEVEL_ENTER,
XmTOP_LEVEL_LEAVE,
XmDRAG_MOTION,
XmDROP_SITE_ENTER,
XmDROP_SITE_LEAVE,
XmDROP_START,
XmDROP_FINISH,
XmDRAG_DROP_FINISH,
XmOPERATION_CHANGED
};
/* Values used to specify type of protocol to use */
enum {
XmDRAG_NONE,
XmDRAG_DROP_ONLY,
XmDRAG_PREFER_PREREGISTER,
XmDRAG_PREREGISTER,
XmDRAG_PREFER_DYNAMIC,
XmDRAG_DYNAMIC,
XmDRAG_PREFER_RECEIVER
};
/* Operation codes */
enum {
XmDROP_NOOP,
XmDROP_MOVE = 0x01,
XmDROP_COPY = 0x02,
XmDROP_LINK = 0x04
};
/* Drop site status */
enum {
XmNO_DROP_SITE = 0x01,
XmDROP_SITE_INVALID = 0x02,
XmDROP_SITE_VALID = 0x03
};
/* completion status */
enum {
XmDROP,
XmDROP_HELP,
XmDROP_CANCEL,
XmDROP_INTERRUPT
};
/* Byte swapping routines. The motif specification leaves it
* up to us to save a few bytes in the client messages
*/
static gchar local_byte_order = '\0';
#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 */
static void
init_byte_order (void)
{
guint32 myint = 0x01020304;
local_byte_order = (*(gchar *)&myint == 1) ? 'B' : 'l';
}
static guint16
card16_to_host (guint16 x, gchar byte_order) {
if (byte_order == local_byte_order)
return x;
else
return (x << 8) | (x >> 8);
}
static guint32
card32_to_host (guint32 x, gchar byte_order) {
if (byte_order == local_byte_order)
return x;
else
return (x << 24) | ((x & 0xff00) << 8) | ((x & 0xff0000) >> 8) | (x >> 24);
}
/* Motif packs together fields of varying length into the
* client message. We can't rely on accessing these
* through data.s[], data.l[], etc, because on some architectures
* (i.e., Alpha) these won't be valid for format == 8.
*/
#define MOTIF_XCLIENT_BYTE(xevent,i) \
(xevent)->xclient.data.b[i]
#define MOTIF_XCLIENT_SHORT(xevent,i) \
((gint16 *)&((xevent)->xclient.data.b[0]))[i]
#define MOTIF_XCLIENT_LONG(xevent,i) \
((gint32 *)&((xevent)->xclient.data.b[0]))[i]
#define MOTIF_UNPACK_BYTE(xevent,i) MOTIF_XCLIENT_BYTE(xevent,i)
#define MOTIF_UNPACK_SHORT(xevent,i) \
card16_to_host (MOTIF_XCLIENT_SHORT(xevent,i), MOTIF_XCLIENT_BYTE(xevent, 1))
#define MOTIF_UNPACK_LONG(xevent,i) \
card32_to_host (MOTIF_XCLIENT_LONG(xevent,i), MOTIF_XCLIENT_BYTE(xevent, 1))
/***** Dest side ***********/
/* Property placed on source windows */
typedef struct _MotifDragInitiatorInfo {
guint8 byte_order;
guint8 protocol_version;
guint16 targets_index;
guint32 selection_atom;
} MotifDragInitiatorInfo;
/* Header for target table on the drag window */
typedef struct _MotifTargetTableHeader {
guchar byte_order;
guchar protocol_version;
guint16 n_lists;
guint32 total_size;
} MotifTargetTableHeader;
/* Property placed on target windows */
typedef struct _MotifDragReceiverInfo {
guint8 byte_order;
guint8 protocol_version;
guint8 protocol_style;
guint8 pad;
guint32 proxy_window;
guint16 num_drop_sites;
guint16 padding;
guint32 total_size;
} MotifDragReceiverInfo;
/* Target table handling */
static GdkFilterReturn
motif_drag_window_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
XEvent *xev = (XEvent *)xevent;
GdkDisplay *display = GDK_WINDOW_DISPLAY (event->any.window);
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
switch (xev->xany.type)
{
case DestroyNotify:
display_x11->motif_drag_window = None;
display_x11->motif_drag_gdk_window = NULL;
break;
case PropertyNotify:
if (display_x11->motif_target_lists &&
(xev->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS")))
motif_read_target_table (display);
break;
}
return GDK_FILTER_REMOVE;
}
static Window
motif_lookup_drag_window (GdkDisplay *display,
Display *lookup_xdisplay)
{
Window retval = None;
gulong bytes_after, nitems;
Atom type;
gint format;
guchar *data;
XGetWindowProperty (lookup_xdisplay, RootWindow (lookup_xdisplay, 0),
gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_WINDOW"),
0, 1, FALSE,
XA_WINDOW, &type, &format, &nitems, &bytes_after,
&data);
if ((format == 32) && (nitems == 1) && (bytes_after == 0))
{
retval = *(Window *)data;
GDK_NOTE (DND,
g_message ("Found drag window %#lx\n", GDK_DISPLAY_X11 (display)->motif_drag_window));
}
if (type != None)
XFree (data);
return retval;
}
/* Finds the window where global Motif drag information is stored.
* If it doesn't exist and 'create' is TRUE, create one.
*/
static Window
motif_find_drag_window (GdkDisplay *display,
gboolean create)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
if (!display_x11->motif_drag_window)
{
Atom motif_drag_window_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_WINDOW");
display_x11->motif_drag_window = motif_lookup_drag_window (display, display_x11->xdisplay);
if (!display_x11->motif_drag_window && create)
{
/* Create a persistant window. (Copied from LessTif) */
Display *persistant_xdisplay;
XSetWindowAttributes attr;
persistant_xdisplay = XOpenDisplay (gdk_display_get_name (display));
XSetCloseDownMode (persistant_xdisplay, RetainPermanent);
XGrabServer (persistant_xdisplay);
display_x11->motif_drag_window = motif_lookup_drag_window (display, persistant_xdisplay);
if (!display_x11->motif_drag_window)
{
attr.override_redirect = True;
attr.event_mask = PropertyChangeMask;
display_x11->motif_drag_window =
XCreateWindow (persistant_xdisplay,
RootWindow (persistant_xdisplay, 0),
-100, -100, 10, 10, 0, 0,
InputOnly, (Visual *)CopyFromParent,
(CWOverrideRedirect | CWEventMask), &attr);
GDK_NOTE (DND,
g_message ("Created drag window %#lx\n", display_x11->motif_drag_window));
XChangeProperty (persistant_xdisplay,
RootWindow (persistant_xdisplay, 0),
motif_drag_window_atom, XA_WINDOW,
32, PropModeReplace,
(guchar *)&motif_drag_window_atom, 1);
}
XUngrabServer (persistant_xdisplay);
XCloseDisplay (persistant_xdisplay);
}
/* There is a miniscule race condition here if the drag window
* gets destroyed exactly now.
*/
if (display_x11->motif_drag_window)
{
display_x11->motif_drag_gdk_window =
gdk_window_foreign_new_for_display (display, display_x11->motif_drag_window);
gdk_window_add_filter (display_x11->motif_drag_gdk_window,
motif_drag_window_filter,
NULL);
}
}
return display_x11->motif_drag_window;
}
static void
motif_read_target_table (GdkDisplay *display)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
gulong bytes_after, nitems;
Atom type;
gint format;
gint i, j;
Atom motif_drag_targets_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS");
if (display_x11->motif_target_lists)
{
for (i=0; i<display_x11->motif_n_target_lists; i++)
g_list_free (display_x11->motif_target_lists[i]);
g_free (display_x11->motif_target_lists);
display_x11->motif_target_lists = NULL;
display_x11->motif_n_target_lists = 0;
}
if (motif_find_drag_window (display, FALSE))
{
guchar *data;
MotifTargetTableHeader *header = NULL;
guchar *target_bytes = NULL;
guchar *p;
gboolean success = FALSE;
gdk_error_trap_push ();
XGetWindowProperty (display_x11->xdisplay,
display_x11->motif_drag_window,
motif_drag_targets_atom,
0, (sizeof(MotifTargetTableHeader)+3)/4, FALSE,
motif_drag_targets_atom,
&type, &format, &nitems, &bytes_after,
&data);
if (gdk_error_trap_pop () || (format != 8) || (nitems < sizeof (MotifTargetTableHeader)))
goto error;
header = (MotifTargetTableHeader *)data;
header->n_lists = card16_to_host (header->n_lists, header->byte_order);
header->total_size = card32_to_host (header->total_size, header->byte_order);
gdk_error_trap_push ();
XGetWindowProperty (display_x11->xdisplay,
display_x11->motif_drag_window,
motif_drag_targets_atom,
(sizeof(MotifTargetTableHeader)+3)/4,
(header->total_size + 3)/4 - (sizeof(MotifTargetTableHeader) + 3)/4,
FALSE,
motif_drag_targets_atom, &type, &format, &nitems,
&bytes_after, &target_bytes);
if (gdk_error_trap_pop () || (format != 8) || (bytes_after != 0) ||
(nitems != header->total_size - sizeof(MotifTargetTableHeader)))
goto error;
display_x11->motif_n_target_lists = header->n_lists;
display_x11->motif_target_lists = g_new0 (GList *, display_x11->motif_n_target_lists);
p = target_bytes;
for (i=0; i<header->n_lists; i++)
{
gint n_targets;
guint32 *targets;
if (p + sizeof(guint16) - target_bytes > nitems)
goto error;
n_targets = card16_to_host (*(gushort *)p, header->byte_order);
/* We need to make a copy of the targets, since it may
* be unaligned
*/
targets = g_new (guint32, n_targets);
memcpy (targets, p + sizeof(guint16), sizeof(guint32) * n_targets);
p += sizeof(guint16) + n_targets * sizeof(guint32);
if (p - target_bytes > nitems)
goto error;
for (j=0; j<n_targets; j++)
display_x11->motif_target_lists[i] =
g_list_prepend (display_x11->motif_target_lists[i],
GUINT_TO_POINTER (card32_to_host (targets[j],
header->byte_order)));
g_free (targets);
display_x11->motif_target_lists[i] = g_list_reverse (display_x11->motif_target_lists[i]);
}
success = TRUE;
error:
if (header)
XFree (header);
if (target_bytes)
XFree (target_bytes);
if (!success)
{
if (display_x11->motif_target_lists)
{
g_free (display_x11->motif_target_lists);
display_x11->motif_target_lists = NULL;
display_x11->motif_n_target_lists = 0;
}
g_warning ("Error reading Motif target table\n");
}
}
}
static gint
targets_sort_func (gconstpointer a, gconstpointer b)
{
return (GPOINTER_TO_UINT (a) < GPOINTER_TO_UINT (b)) ?
-1 : ((GPOINTER_TO_UINT (a) > GPOINTER_TO_UINT (b)) ? 1 : 0);
}
/* Check if given (sorted) list is in the targets table */
static gint
motif_target_table_check (GdkDisplay *display,
GList *sorted)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
GList *tmp_list1, *tmp_list2;
gint i;
for (i=0; i<display_x11->motif_n_target_lists; i++)
{
tmp_list1 = display_x11->motif_target_lists[i];
tmp_list2 = sorted;
while (tmp_list1 && tmp_list2)
{
if (tmp_list1->data != tmp_list2->data)
break;
tmp_list1 = tmp_list1->next;
tmp_list2 = tmp_list2->next;
}
if (!tmp_list1 && !tmp_list2) /* Found it */
return i;
}
return -1;
}
static gint
motif_add_to_target_table (GdkDisplay *display,
GList *targets) /* targets is list of GdkAtom */
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
GList *sorted = NULL;
gint index = -1;
gint i;
GList *tmp_list;
/* make a sorted copy of the list */
while (targets)
{
Atom xatom = gdk_x11_atom_to_xatom_for_display (display, GDK_POINTER_TO_ATOM (targets->data));
sorted = g_list_insert_sorted (sorted, GUINT_TO_POINTER (xatom), targets_sort_func);
targets = targets->next;
}
/* First check if it is there already */
if (display_x11->motif_target_lists)
index = motif_target_table_check (display, sorted);
/* We need to grab the server while doing this, to ensure
* atomiticity. Ugh
*/
if (index < 0)
{
/* We need to make sure that it exists _before_ we grab the
* server, since we can't open a new connection after we
* grab the server.
*/
motif_find_drag_window (display, TRUE);
gdk_x11_display_grab (display);
motif_read_target_table (display);
/* Check again, in case it was added in the meantime */
if (display_x11->motif_target_lists)
index = motif_target_table_check (display, sorted);
if (index < 0)
{
guint32 total_size = 0;
guchar *data;
guchar *p;
guint16 *p16;
MotifTargetTableHeader *header;
if (!display_x11->motif_target_lists)
{
display_x11->motif_target_lists = g_new (GList *, 1);
display_x11->motif_n_target_lists = 1;
}
else
{
display_x11->motif_n_target_lists++;
display_x11->motif_target_lists = g_realloc (display_x11->motif_target_lists,
sizeof(GList *) * display_x11->motif_n_target_lists);
}
display_x11->motif_target_lists[display_x11->motif_n_target_lists - 1] = sorted;
sorted = NULL;
index = display_x11->motif_n_target_lists - 1;
total_size = sizeof (MotifTargetTableHeader);
for (i = 0; i < display_x11->motif_n_target_lists ; i++)
total_size += sizeof(guint16) + sizeof(guint32) * g_list_length (display_x11->motif_target_lists[i]);
data = g_malloc (total_size);
header = (MotifTargetTableHeader *)data;
p = data + sizeof(MotifTargetTableHeader);
header->byte_order = local_byte_order;
header->protocol_version = 0;
header->n_lists = display_x11->motif_n_target_lists;
header->total_size = total_size;
for (i = 0; i < display_x11->motif_n_target_lists ; i++)
{
guint16 n_targets = g_list_length (display_x11->motif_target_lists[i]);
guint32 *targets = g_new (guint32, n_targets);
guint32 *p32 = targets;
tmp_list = display_x11->motif_target_lists[i];
while (tmp_list)
{
*p32 = GPOINTER_TO_UINT (tmp_list->data);
tmp_list = tmp_list->next;
p32++;
}
p16 = (guint16 *)p;
p += sizeof(guint16);
memcpy (p, targets, n_targets * sizeof(guint32));
*p16 = n_targets;
p += sizeof(guint32) * n_targets;
g_free (targets);
}
XChangeProperty (display_x11->xdisplay,
display_x11->motif_drag_window,
gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"),
gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"),
8, PropModeReplace,
data, total_size);
}
gdk_x11_display_ungrab (display);
}
g_list_free (sorted);
return index;
}
/* Translate flags */
static void
motif_dnd_translate_flags (GdkDragContext *context, guint16 flags)
{
guint recommended_op = flags & 0x000f;
guint possible_ops = (flags & 0x0f0) >> 4;
switch (recommended_op)
{
case XmDROP_MOVE:
context->suggested_action = GDK_ACTION_MOVE;
break;
case XmDROP_COPY:
context->suggested_action = GDK_ACTION_COPY;
break;
case XmDROP_LINK:
context->suggested_action = GDK_ACTION_LINK;
break;
default:
context->suggested_action = GDK_ACTION_COPY;
break;
}
context->actions = 0;
if (possible_ops & XmDROP_MOVE)
context->actions |= GDK_ACTION_MOVE;
if (possible_ops & XmDROP_COPY)
context->actions |= GDK_ACTION_COPY;
if (possible_ops & XmDROP_LINK)
context->actions |= GDK_ACTION_LINK;
}
static guint16
motif_dnd_get_flags (GdkDragContext *context)
{
guint16 flags = 0;
switch (context->suggested_action)
{
case GDK_ACTION_MOVE:
flags = XmDROP_MOVE;
break;
case GDK_ACTION_COPY:
flags = XmDROP_COPY;
break;
case GDK_ACTION_LINK:
flags = XmDROP_LINK;
break;
default:
flags = XmDROP_NOOP;
break;
}
if (context->actions & GDK_ACTION_MOVE)
flags |= XmDROP_MOVE << 8;
if (context->actions & GDK_ACTION_COPY)
flags |= XmDROP_COPY << 8;
if (context->actions & GDK_ACTION_LINK)
flags |= XmDROP_LINK << 8;
return flags;
}
/* Source Side */
static void
motif_set_targets (GdkDragContext *context)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
MotifDragInitiatorInfo info;
gint i;
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
info.byte_order = local_byte_order;
info.protocol_version = 0;
info.targets_index = motif_add_to_target_table (display, context->targets);
for (i=0; ; i++)
{
gchar buf[20];
g_snprintf(buf, 20, "_GDK_SELECTION_%d", i);
private->motif_selection = gdk_x11_get_xatom_by_name_for_display (display, buf);
if (!XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display), private->motif_selection))
break;
}
info.selection_atom = private->motif_selection;
XChangeProperty (GDK_DRAWABLE_XDISPLAY (context->source_window),
GDK_DRAWABLE_XID (context->source_window),
private->motif_selection,
gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_INITIATOR_INFO"),
8, PropModeReplace,
(guchar *)&info, sizeof (info));
private->motif_targets_set = 1;
}
static guint32
motif_check_dest (GdkDisplay *display,
Window win)
{
gboolean retval = FALSE;
guchar *data;
MotifDragReceiverInfo *info;
Atom type = None;
int format;
unsigned long nitems, after;
Atom motif_drag_receiver_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_RECEIVER_INFO");
gdk_error_trap_push ();
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), win,
motif_drag_receiver_info_atom,
0, (sizeof(*info)+3)/4, False, AnyPropertyType,
&type, &format, &nitems, &after,
&data);
if (gdk_error_trap_pop() == 0)
{
if (type != None)
{
info = (MotifDragReceiverInfo *)data;
if ((format == 8) && (nitems == sizeof(*info)))
{
if ((info->protocol_version == 0) &&
((info->protocol_style == XmDRAG_PREFER_PREREGISTER) ||
(info->protocol_style == XmDRAG_PREFER_DYNAMIC) ||
(info->protocol_style == XmDRAG_DYNAMIC)))
retval = TRUE;
}
else
{
GDK_NOTE (DND,
g_warning ("Invalid Motif drag receiver property on window %ld\n", win));
}
XFree (info);
}
}
return retval ? win : None;
}
static void
motif_send_enter (GdkDragContext *context,
guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
XEvent xev;
if (!G_LIKELY (GDK_DISPLAY_X11 (display)->trusted_client))
return; /* Motif Dnd requires getting properties on the root window */
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window);
MOTIF_XCLIENT_BYTE (&xev, 0) = XmTOP_LEVEL_ENTER;
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
MOTIF_XCLIENT_SHORT (&xev, 1) = 0;
MOTIF_XCLIENT_LONG (&xev, 1) = time;
MOTIF_XCLIENT_LONG (&xev, 2) = GDK_DRAWABLE_XID (context->source_window);
if (!private->motif_targets_set)
motif_set_targets (context);
MOTIF_XCLIENT_LONG (&xev, 3) = private->motif_selection;
MOTIF_XCLIENT_LONG (&xev, 4) = 0;
if (!_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
}
static void
motif_send_leave (GdkDragContext *context,
guint32 time)
{
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window);
MOTIF_XCLIENT_BYTE (&xev, 0) = XmTOP_LEVEL_LEAVE;
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
MOTIF_XCLIENT_SHORT (&xev, 1) = 0;
MOTIF_XCLIENT_LONG (&xev, 1) = time;
MOTIF_XCLIENT_LONG (&xev, 2) = 0;
MOTIF_XCLIENT_LONG (&xev, 3) = 0;
MOTIF_XCLIENT_LONG (&xev, 4) = 0;
if (!_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
}
static gboolean
motif_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
gboolean retval;
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window);
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
MOTIF_XCLIENT_SHORT (&xev, 1) = motif_dnd_get_flags (context);
MOTIF_XCLIENT_LONG (&xev, 1) = time;
MOTIF_XCLIENT_LONG (&xev, 3) = 0;
MOTIF_XCLIENT_LONG (&xev, 4) = 0;
if ((context->suggested_action != private->old_action) ||
(context->actions != private->old_actions))
{
MOTIF_XCLIENT_BYTE (&xev, 0) = XmOPERATION_CHANGED;
/* private->drag_status = GDK_DRAG_STATUS_ACTION_WAIT; */
retval = TRUE;
}
else
{
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDRAG_MOTION;
MOTIF_XCLIENT_SHORT (&xev, 4) = x_root;
MOTIF_XCLIENT_SHORT (&xev, 5) = y_root;
private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
retval = FALSE;
}
if (!_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
return retval;
}
static void
motif_send_drop (GdkDragContext *context, guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window);
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_START;
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
MOTIF_XCLIENT_SHORT (&xev, 1) = motif_dnd_get_flags (context);
MOTIF_XCLIENT_LONG (&xev, 1) = time;
MOTIF_XCLIENT_SHORT (&xev, 4) = private->last_x;
MOTIF_XCLIENT_SHORT (&xev, 5) = private->last_y;
MOTIF_XCLIENT_LONG (&xev, 3) = private->motif_selection;
MOTIF_XCLIENT_LONG (&xev, 4) = GDK_DRAWABLE_XID (context->source_window);
if (!_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
}
/* Target Side */
static gboolean
motif_read_initiator_info (GdkDisplay *display,
Window source_window,
Atom atom,
GList **targets,
Atom *selection)
{
GList *tmp_list;
Atom type;
gint format;
gulong nitems;
gulong bytes_after;
guchar *data;
MotifDragInitiatorInfo *initiator_info;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
gdk_error_trap_push ();
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), source_window, atom,
0, sizeof(*initiator_info), FALSE,
gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_INITIATOR_INFO"),
&type, &format, &nitems, &bytes_after,
&data);
if (gdk_error_trap_pop () || (format != 8) || (nitems != sizeof (MotifDragInitiatorInfo)) || (bytes_after != 0))
{
g_warning ("Error reading initiator info\n");
return FALSE;
}
initiator_info = (MotifDragInitiatorInfo *)data;
motif_read_target_table (display);
initiator_info->targets_index =
card16_to_host (initiator_info->targets_index, initiator_info->byte_order);
initiator_info->selection_atom =
card32_to_host (initiator_info->selection_atom, initiator_info->byte_order);
if (initiator_info->targets_index >= display_x11->motif_n_target_lists)
{
g_warning ("Invalid target index in TOP_LEVEL_ENTER MESSAGE");
XFree (initiator_info);
return FALSE;
}
tmp_list = g_list_last (display_x11->motif_target_lists[initiator_info->targets_index]);
*targets = NULL;
while (tmp_list)
{
GdkAtom atom = gdk_x11_xatom_to_atom_for_display (display, GPOINTER_TO_UINT (tmp_list->data));
*targets = g_list_prepend (*targets, GDK_ATOM_TO_POINTER (atom));
tmp_list = tmp_list->prev;
}
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_DND)
print_target_list (*targets);
#endif /* G_ENABLE_DEBUG */
*selection = initiator_info->selection_atom;
XFree (initiator_info);
return TRUE;
}
static GdkDragContext *
motif_drag_context_new (GdkWindow *dest_window,
guint32 timestamp,
guint32 source_window,
guint32 atom)
{
GdkDragContext *new_context;
GdkDragContextPrivateX11 *private;
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (dest_window);
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
/* FIXME, current_dest_drag really shouldn't be NULL'd
* if we error below.
*/
if (display_x11->current_dest_drag != NULL)
{
if (timestamp >= display_x11->current_dest_drag->start_time)
{
g_object_unref (display_x11->current_dest_drag);
display_x11->current_dest_drag = NULL;
}
else
return NULL;
}
new_context = gdk_drag_context_new ();
private = PRIVATE_DATA (new_context);
new_context->protocol = GDK_DRAG_PROTO_MOTIF;
new_context->is_source = FALSE;
new_context->source_window = gdk_window_lookup_for_display (display, source_window);
if (new_context->source_window)
g_object_ref (new_context->source_window);
else
{
new_context->source_window = gdk_window_foreign_new_for_display (display, source_window);
if (!new_context->source_window)
{
g_object_unref (new_context);
return NULL;
}
}
new_context->dest_window = dest_window;
g_object_ref (dest_window);
new_context->start_time = timestamp;
if (!motif_read_initiator_info (GDK_WINDOW_DISPLAY (dest_window),
source_window,
atom,
&new_context->targets,
&private->motif_selection))
{
g_object_unref (new_context);
return NULL;
}
return new_context;
}
/*
* The MOTIF drag protocol has no real provisions for distinguishing
* multiple simultaneous drops. If the sources grab the pointer
* when doing drags, that shouldn't happen, in any case. If it
* does, we can't do much except hope for the best.
*/
static GdkFilterReturn
motif_top_level_enter (GdkEvent *event,
guint16 flags,
guint32 timestamp,
guint32 source_window,
guint32 atom)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window));
GdkDragContext *new_context;
GDK_NOTE(DND, g_message ("Motif DND top level enter: flags: %#4x time: %d source_widow: %#4x atom: %d",
flags, timestamp, source_window, atom));
new_context = motif_drag_context_new (event->any.window, timestamp, source_window, atom);
if (!new_context)
return GDK_FILTER_REMOVE;
event->dnd.type = GDK_DRAG_ENTER;
event->dnd.context = new_context;
g_object_ref (new_context);
display_x11->current_dest_drag = new_context;
return GDK_FILTER_TRANSLATE;
}
static GdkFilterReturn
motif_top_level_leave (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window));
GDK_NOTE(DND, g_message ("Motif DND top level leave: flags: %#4x time: %d",
flags, timestamp));
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= display_x11->current_dest_drag->start_time))
{
event->dnd.type = GDK_DRAG_LEAVE;
/* Pass ownership of context to the event */
event->dnd.context = display_x11->current_dest_drag;
display_x11->current_dest_drag = NULL;
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
motif_motion (GdkEvent *event,
guint16 flags,
guint32 timestamp,
gint16 x_root,
gint16 y_root)
{
GdkDragContextPrivateX11 *private;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window));
GDK_NOTE(DND, g_message ("Motif DND motion: flags: %#4x time: %d (%d, %d)",
flags, timestamp, x_root, y_root));
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= display_x11->current_dest_drag->start_time))
{
private = PRIVATE_DATA (display_x11->current_dest_drag);
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.context = display_x11->current_dest_drag;
g_object_ref (display_x11->current_dest_drag);
event->dnd.time = timestamp;
motif_dnd_translate_flags (display_x11->current_dest_drag, flags);
event->dnd.x_root = x_root;
event->dnd.y_root = y_root;
private->last_x = x_root;
private->last_y = y_root;
private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
motif_operation_changed (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GdkDragContextPrivateX11 *private;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window));
GDK_NOTE(DND, g_message ("Motif DND operation changed: flags: %#4x time: %d",
flags, timestamp));
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= display_x11->current_dest_drag->start_time))
{
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.send_event = FALSE;
event->dnd.context = display_x11->current_dest_drag;
g_object_ref (display_x11->current_dest_drag);
event->dnd.time = timestamp;
private = PRIVATE_DATA (display_x11->current_dest_drag);
motif_dnd_translate_flags (display_x11->current_dest_drag, flags);
event->dnd.x_root = private->last_x;
event->dnd.y_root = private->last_y;
private->drag_status = GDK_DRAG_STATUS_ACTION_WAIT;
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
motif_drop_start (GdkEvent *event,
guint16 flags,
guint32 timestamp,
guint32 source_window,
guint32 atom,
gint16 x_root,
gint16 y_root)
{
GdkDragContext *new_context;
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window));
GDK_NOTE(DND, g_message ("Motif DND drop start: flags: %#4x time: %d (%d, %d) source_widow: %#4x atom: %d",
flags, timestamp, x_root, y_root, source_window, atom));
new_context = motif_drag_context_new (event->any.window, timestamp, source_window, atom);
if (!new_context)
return GDK_FILTER_REMOVE;
motif_dnd_translate_flags (new_context, flags);
event->dnd.type = GDK_DROP_START;
event->dnd.context = new_context;
event->dnd.time = timestamp;
event->dnd.x_root = x_root;
event->dnd.y_root = y_root;
gdk_x11_window_set_user_time (event->any.window, timestamp);
g_object_ref (new_context);
display_x11->current_dest_drag = new_context;
return GDK_FILTER_TRANSLATE;
}
static GdkFilterReturn
motif_drag_status (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GdkDragContext *context;
GdkDisplay *display;
GDK_NOTE (DND,
g_message ("Motif status message: flags %x", flags));
display = gdk_drawable_get_display (event->any.window);
if (!display)
return GDK_FILTER_REMOVE;
context = gdk_drag_context_find (display, TRUE, GDK_DRAWABLE_XID (event->any.window), None);
if (context)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
if ((private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT) ||
(private->drag_status == GDK_DRAG_STATUS_ACTION_WAIT))
private->drag_status = GDK_DRAG_STATUS_DRAG;
event->dnd.type = GDK_DRAG_STATUS;
event->dnd.send_event = FALSE;
event->dnd.context = context;
g_object_ref (context);
event->dnd.time = timestamp;
if ((flags & 0x00f0) >> 4 == XmDROP_SITE_VALID)
{
switch (flags & 0x000f)
{
case XmDROP_NOOP:
context->action = 0;
break;
case XmDROP_MOVE:
context->action = GDK_ACTION_MOVE;
break;
case XmDROP_COPY:
context->action = GDK_ACTION_COPY;
break;
case XmDROP_LINK:
context->action = GDK_ACTION_LINK;
break;
}
}
else
context->action = 0;
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
motif_dnd_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint8 reason;
guint16 flags;
guint32 timestamp;
guint32 source_window;
Atom atom;
gint16 x_root, y_root;
gboolean is_reply;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
/* First read some fields common to all Motif DND messages */
reason = MOTIF_UNPACK_BYTE (xevent, 0);
flags = MOTIF_UNPACK_SHORT (xevent, 1);
timestamp = MOTIF_UNPACK_LONG (xevent, 1);
is_reply = ((reason & 0x80) != 0);
switch (reason & 0x7f)
{
case XmTOP_LEVEL_ENTER:
source_window = MOTIF_UNPACK_LONG (xevent, 2);
atom = MOTIF_UNPACK_LONG (xevent, 3);
return motif_top_level_enter (event, flags, timestamp, source_window, atom);
case XmTOP_LEVEL_LEAVE:
return motif_top_level_leave (event, flags, timestamp);
case XmDRAG_MOTION:
x_root = MOTIF_UNPACK_SHORT (xevent, 4);
y_root = MOTIF_UNPACK_SHORT (xevent, 5);
if (!is_reply)
return motif_motion (event, flags, timestamp, x_root, y_root);
else
return motif_drag_status (event, flags, timestamp);
case XmDROP_SITE_ENTER:
return motif_drag_status (event, flags, timestamp);
case XmDROP_SITE_LEAVE:
return motif_drag_status (event,
XmNO_DROP_SITE << 8 | XmDROP_NOOP,
timestamp);
case XmDROP_START:
x_root = MOTIF_UNPACK_SHORT (xevent, 4);
y_root = MOTIF_UNPACK_SHORT (xevent, 5);
atom = MOTIF_UNPACK_LONG (xevent, 3);
source_window = MOTIF_UNPACK_LONG (xevent, 4);
if (!is_reply)
return motif_drop_start (event, flags, timestamp, source_window, atom, x_root, y_root);
break;
case XmOPERATION_CHANGED:
if (!is_reply)
return motif_operation_changed (event, flags, timestamp);
else
return motif_drag_status (event, flags, timestamp);
break;
/* To the best of my knowledge, these next two messages are
* not part of the protocol, though they are defined in
* the header files.
*/
case XmDROP_FINISH:
case XmDRAG_DROP_FINISH:
break;
}
return GDK_FILTER_REMOVE;
}
/*************************************************************
***************************** 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 = sizeof(xdnd_actions_table) / sizeof(xdnd_actions_table[0]);
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 = gdk_x11_xatom_to_atom_for_display (display, xatom);
gint i;
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_drawable_get_display (event->any.window);
context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window);
if (context)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
if (private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
private->drag_status = GDK_DRAG_STATUS_DRAG;
event->dnd.send_event = FALSE;
event->dnd.type = GDK_DRAG_STATUS;
event->dnd.context = 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;
GdkDragContextPrivateX11 *private;
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_drawable_get_display (event->any.window);
context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window);
if (context)
{
private = PRIVATE_DATA (context);
if (private->version == 5)
private->drop_failed = xevent->xclient.data.l[1] == 0;
event->dnd.type = GDK_DROP_FINISHED;
event->dnd.context = 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 (GdkDragContext *context)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
Atom *atomlist;
GList *tmp_list = context->targets;
gint i;
gint n_atoms = g_list_length (context->targets);
GdkDisplay *display = GDK_DRAWABLE_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_DRAWABLE_XDISPLAY (context->source_window),
GDK_DRAWABLE_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);
private->xdnd_targets_set = 1;
}
static void
xdnd_set_actions (GdkDragContext *context)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
Atom *atomlist;
gint i;
gint n_atoms;
guint actions;
GdkDisplay *display = GDK_DRAWABLE_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_DRAWABLE_XDISPLAY (context->source_window),
GDK_DRAWABLE_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);
private->xdnd_actions_set = TRUE;
private->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;
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
g_object_unref (context->dest_window);
context->dest_window = NULL;
context->action = 0;
private->drag_status = GDK_DRAG_STATUS_DRAG;
temp_event.dnd.type = GDK_DRAG_STATUS;
temp_event.dnd.window = context->source_window;
temp_event.dnd.send_event = TRUE;
temp_event.dnd.context = context;
temp_event.dnd.time = GDK_CURRENT_TIME;
gdk_event_put (&temp_event);
}
g_object_unref (context);
}
static GdkDisplay *
gdk_drag_context_get_display (GdkDragContext *context)
{
if (context->source_window)
return GDK_DRAWABLE_DISPLAY (context->source_window);
else if (context->dest_window)
return GDK_DRAWABLE_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 (GdkDragContext *context,
GdkWindow *window,
gboolean propagate,
XEvent *event_send)
{
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.any.window = window;
if ((*xdnd_filters[i].func) (event_send, &temp_event, NULL) == GDK_FILTER_TRANSLATE)
{
gdk_event_put (&temp_event);
g_object_unref (temp_event.dnd.context);
}
return TRUE;
}
}
}
xwindow = GDK_WINDOW_XWINDOW (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 (GdkDragContext *context)
{
XEvent xev;
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->dest_window);
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 = private->drop_xid ?
private->drop_xid :
GDK_DRAWABLE_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->source_window);
xev.xclient.data.l[1] = (private->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_DRAWABLE_XID (context->source_window), private->version));
if (g_list_length (context->targets) > 3)
{
if (!private->xdnd_targets_set)
xdnd_set_targets (context);
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, context->dest_window,
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_leave (GdkDragContext *context)
{
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
XEvent xev;
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
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 = private->drop_xid ?
private->drop_xid :
GDK_DRAWABLE_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_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, context->dest_window,
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_drop (GdkDragContext *context, guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_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 = private->drop_xid ?
private->drop_xid :
GDK_DRAWABLE_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_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, context->dest_window,
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkDisplay *display = GDK_DRAWABLE_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 = private->drop_xid ?
private->drop_xid :
GDK_DRAWABLE_XID (context->dest_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_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, context->dest_window,
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->dest_window)));
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
private->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_error_trap_push ();
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_error_trap_pop ();
return retval ? (proxy ? proxy : win) : None;
}
/* Target side */
static void
xdnd_read_actions (GdkDragContext *context)
{
GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window);
Atom type;
int format;
gulong nitems, after;
guchar *data;
Atom *atoms;
gint i;
PRIVATE_DATA (context)->xdnd_have_actions = FALSE;
if (gdk_window_get_window_type (context->source_window) == GDK_WINDOW_FOREIGN)
{
/* Get the XdndActionList, if set */
gdk_error_trap_push ();
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_DRAWABLE_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]);
PRIVATE_DATA (context)->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_error_trap_pop ();
}
else
{
/* Local drag
*/
GdkDragContext *source_context;
source_context = gdk_drag_context_find (display, TRUE,
GDK_DRAWABLE_XID (context->source_window),
GDK_DRAWABLE_XID (context->dest_window));
if (source_context)
{
context->actions = source_context->actions;
PRIVATE_DATA (context)->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;
GdkDragContext *context = 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);
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_error_trap_push ();
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_display_sync (gdk_drawable_get_display (window));
gdk_error_trap_pop ();
}
}
static void
base_precache_atoms (GdkDisplay *display)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
if (!display_x11->base_dnd_atoms_precached)
{
static const char *const precache_atoms[] = {
"ENLIGHTENMENT_DESKTOP",
"WM_STATE",
"XdndAware",
"XdndProxy",
"_MOTIF_DRAG_RECEIVER_INFO"
};
_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)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
if (!display_x11->xdnd_atoms_precached)
{
static const char *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;
GdkDisplayX11 *display_x11;
XEvent *xevent = (XEvent *)xev;
GdkDragContext *new_context;
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_DRAWABLE_DISPLAY (event->any.window);
display_x11 = GDK_DISPLAY_X11 (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;
}
new_context = gdk_drag_context_new ();
new_context->protocol = GDK_DRAG_PROTO_XDND;
PRIVATE_DATA(new_context)->version = version;
new_context->source_window = gdk_window_lookup_for_display (display, source_window);
if (new_context->source_window)
g_object_ref (new_context->source_window);
else
{
new_context->source_window = gdk_window_foreign_new_for_display (display, source_window);
if (!new_context->source_window)
{
g_object_unref (new_context);
return GDK_FILTER_REMOVE;
}
}
new_context->dest_window = event->any.window;
g_object_ref (new_context->dest_window);
new_context->targets = NULL;
if (get_types)
{
gdk_error_trap_push ();
XGetWindowProperty (GDK_DRAWABLE_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_error_trap_pop () || (format != 32) || (type != XA_ATOM))
{
g_object_unref (new_context);
if (data)
XFree (data);
return GDK_FILTER_REMOVE;
}
atoms = (Atom *)data;
for (i=0; i<nitems; i++)
new_context->targets =
g_list_append (new_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])
new_context->targets =
g_list_append (new_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 (new_context->targets);
#endif /* G_ENABLE_DEBUG */
xdnd_manage_source_filter (new_context, new_context->source_window, TRUE);
xdnd_read_actions (new_context);
event->dnd.type = GDK_DRAG_ENTER;
event->dnd.context = new_context;
g_object_ref (new_context);
display_x11->current_dest_drag = new_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;
GdkDisplayX11 *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_DRAWABLE_DISPLAY (event->any.window);
display_x11 = GDK_DISPLAY_X11 (display);
xdnd_precache_atoms (display);
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_DRAWABLE_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;
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)
{
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;
GdkDisplayX11 *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 ("XdndPosition: source_window: %#x position: (%d, %d) time: %d action: %ld",
source_window, x_root, y_root, time, action));
display = GDK_DRAWABLE_DISPLAY (event->any.window);
display_x11 = GDK_DISPLAY_X11 (display);
xdnd_precache_atoms (display);
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_DRAWABLE_XID (display_x11->current_dest_drag->source_window) == source_window))
{
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.context = display_x11->current_dest_drag;
g_object_ref (display_x11->current_dest_drag);
event->dnd.time = time;
display_x11->current_dest_drag->suggested_action = xdnd_action_from_atom (display, action);
if (!(PRIVATE_DATA (display_x11->current_dest_drag))->xdnd_have_actions)
display_x11->current_dest_drag->actions = display_x11->current_dest_drag->suggested_action;
event->dnd.x_root = x_root;
event->dnd.y_root = y_root;
(PRIVATE_DATA (display_x11->current_dest_drag))->last_x = x_root;
(PRIVATE_DATA (display_x11->current_dest_drag))->last_y = y_root;
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;
GdkDisplayX11 *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 ("XdndDrop: source_window: %#x time: %d",
source_window, time));
display = GDK_DRAWABLE_DISPLAY (event->any.window);
display_x11 = GDK_DISPLAY_X11 (display);
xdnd_precache_atoms (display);
if ((display_x11->current_dest_drag != NULL) &&
(display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_DRAWABLE_XID (display_x11->current_dest_drag->source_window) == source_window))
{
GdkDragContextPrivateX11 *private;
private = PRIVATE_DATA (display_x11->current_dest_drag);
event->dnd.type = GDK_DROP_START;
event->dnd.context = display_x11->current_dest_drag;
g_object_ref (display_x11->current_dest_drag);
event->dnd.time = time;
event->dnd.x_root = private->last_x;
event->dnd.y_root = private->last_y;
gdk_x11_window_set_user_time (event->any.window, time);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
/*************************************************************
************************** Public API ***********************
*************************************************************/
void
_gdk_dnd_init (GdkDisplay *display)
{
int i;
init_byte_order ();
gdk_display_add_client_message_filter (
display,
gdk_atom_intern_static_string ("_MOTIF_DRAG_AND_DROP_MESSAGE"),
motif_dnd_filter, NULL);
for (i = 0; i < G_N_ELEMENTS (xdnd_filters); i++)
{
gdk_display_add_client_message_filter (
display,
gdk_atom_intern_static_string (xdnd_filters[i].atom_name),
xdnd_filters[i].func, NULL);
}
}
/* Source side */
static void
gdk_drag_do_leave (GdkDragContext *context, guint32 time)
{
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_MOTIF:
motif_send_leave (context, time);
break;
case GDK_DRAG_PROTO_XDND:
xdnd_send_leave (context);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
/**
* gdk_drag_begin:
* @window: the source window for this drag.
* @targets: the list of offered targets.
*
* Starts a drag and creates a new drag context for it.
*
* This function is called by the drag source.
*
* Return value: a newly created #GdkDragContext.
**/
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
GdkDragContext *new_context;
g_return_val_if_fail (window != NULL, NULL);
g_return_val_if_fail (GDK_WINDOW_IS_X11 (window), NULL);
new_context = gdk_drag_context_new ();
new_context->is_source = TRUE;
new_context->source_window = window;
g_object_ref (window);
new_context->targets = g_list_copy (targets);
precache_target_list (new_context);
new_context->actions = 0;
return new_context;
}
static GdkNativeWindow
_gdk_drag_get_protocol_for_display (GdkDisplay *display,
GdkNativeWindow xid,
GdkDragProtocol *protocol,
guint *version)
{
GdkWindow *window;
GdkNativeWindow retval;
g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
base_precache_atoms (display);
/* Check for a local drag
*/
window = gdk_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", xid));
return xid;
}
else if (_gdk_x11_display_is_root_window (display, (Window) 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", xid));
return retval;
}
else if ((retval = motif_check_dest (display, xid)))
{
*protocol = GDK_DRAG_PROTO_MOTIF;
GDK_NOTE (DND, g_message ("Entering motif window %#x\n", xid));
return retval;
}
else
{
/* Check if this is a root window */
gboolean rootwin = FALSE;
Atom type = None;
int format;
unsigned long nitems, after;
unsigned char *data;
if (_gdk_x11_display_is_root_window (display, (Window) xid))
rootwin = TRUE;
gdk_error_trap_push ();
if (!rootwin)
{
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), xid,
gdk_x11_get_xatom_by_name_for_display (display, "ENLIGHTENMENT_DESKTOP"),
0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data) == Success &&
type != None)
{
XFree (data);
rootwin = TRUE;
}
}
/* Until I find out what window manager the next one is for,
* I'm leaving it commented out. It's supported in the
* xscreensaver sources, though.
*/
#if 0
if (!rootwin)
{
if (XGetWindowProperty (gdk_display, win,
gdk_x11_get_xatom_by_name ("__SWM_VROOT"),
0, 0, False, AnyPropertyType,
&type, &format, &nitems, &data) &&
type != None)
{
XFree (data);
rootwin = TRUE;
}
}
#endif
gdk_error_trap_pop ();
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 */
}
/**
* gdk_drag_get_protocol_for_display:
* @display: the #GdkDisplay where the destination window resides
* @xid: the windowing system id of the destination window.
* @protocol: location where the supported DND protocol is returned.
* @returns: the windowing system id of the window where the drop should happen. This
* may be @xid or the id of a proxy window, or zero if @xid doesn't
* support Drag and Drop.
*
* Finds out the DND protocol supported by a window.
*
* Since: 2.2
*/
GdkNativeWindow
gdk_drag_get_protocol_for_display (GdkDisplay *display,
GdkNativeWindow xid,
GdkDragProtocol *protocol)
{
return _gdk_drag_get_protocol_for_display (display, xid, protocol, NULL);
}
static GdkWindowCache *
drag_context_find_window_cache (GdkDragContext *context,
GdkScreen *screen)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GSList *tmp_list;
GdkWindowCache *cache;
for (tmp_list = private->window_caches; tmp_list; tmp_list = tmp_list->next)
{
cache = tmp_list->data;
if (cache->screen == screen)
return cache;
}
cache = gdk_window_cache_new (screen);
private->window_caches = g_slist_prepend (private->window_caches, cache);
return cache;
}
/**
* gdk_drag_find_window_for_screen:
* @context: a #GdkDragContext
* @drag_window: a window which may be at the pointer position, but
* should be ignored, since it is put up by the drag source as an icon.
* @screen: the screen where the destination window is sought.
* @x_root: the x position of the pointer in root coordinates.
* @y_root: the y position of the pointer in root coordinates.
* @dest_window: location to store the destination window in.
* @protocol: location to store the DND protocol in.
*
* Finds the destination window and DND protocol to use at the
* given pointer position.
*
* This function is called by the drag source to obtain the
* @dest_window and @protocol parameters for gdk_drag_motion().
*
* Since: 2.2
**/
void
gdk_drag_find_window_for_screen (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
GdkWindowCache *window_cache;
GdkDisplay *display;
Window dest;
g_return_if_fail (context != NULL);
display = GDK_WINDOW_DISPLAY (context->source_window);
window_cache = drag_context_find_window_cache (context, screen);
dest = get_client_window_at_coords (window_cache,
drag_window && GDK_WINDOW_IS_X11 (drag_window) ?
GDK_DRAWABLE_XID (drag_window) : None,
x_root, y_root);
if (private->dest_xid != dest)
{
Window recipient;
private->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.
*/
if ((recipient = _gdk_drag_get_protocol_for_display (display, dest,
protocol, &private->version)))
{
*dest_window = gdk_window_lookup_for_display (display, recipient);
if (*dest_window)
g_object_ref (*dest_window);
else
*dest_window = gdk_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;
}
}
/**
* gdk_drag_motion:
* @context: a #GdkDragContext.
* @dest_window: the new destination window, obtained by
* gdk_drag_find_window().
* @protocol: the DND protocol in use, obtained by gdk_drag_find_window().
* @x_root: the x position of the pointer in root coordinates.
* @y_root: the y position of the pointer in root coordinates.
* @suggested_action: the suggested action.
* @possible_actions: the possible actions.
* @time_: the timestamp for this operation.
*
* Updates the drag context when the pointer moves or the
* set of actions changes.
*
* This function is called by the drag source.
*
* Return value: FIXME
**/
gboolean
gdk_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
GdkDragContextPrivateX11 *private = PRIVATE_DATA (context);
g_return_val_if_fail (context != NULL, FALSE);
g_return_val_if_fail (dest_window == NULL || GDK_WINDOW_IS_X11 (dest_window), FALSE);
private->old_actions = context->actions;
context->actions = possible_actions;
if (private->old_actions != possible_actions)
private->xdnd_actions_set = FALSE;
if (protocol == GDK_DRAG_PROTO_XDND && private->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 private->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_DRAWABLE_XID (dest_window),
&private->version);
}
}
/* When we have a Xdnd target, make sure our XdndActionList
* matches the current actions;
*/
if (protocol == GDK_DRAG_PROTO_XDND && !private->xdnd_actions_set)
{
if (dest_window)
{
if (gdk_window_get_window_type (dest_window) == GDK_WINDOW_FOREIGN)
xdnd_set_actions (context);
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_DRAWABLE_XID (context->source_window),
GDK_DRAWABLE_XID (dest_window));
if (dest_context)
{
dest_context->actions = context->actions;
PRIVATE_DATA (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, time);
private->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (dest_window)
{
context->dest_window = dest_window;
private->drop_xid = private->dest_xid;
g_object_ref (context->dest_window);
context->protocol = protocol;
switch (protocol)
{
case GDK_DRAG_PROTO_MOTIF:
motif_send_enter (context, time);
break;
case GDK_DRAG_PROTO_XDND:
xdnd_send_enter (context);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
private->old_action = suggested_action;
context->suggested_action = suggested_action;
private->old_actions = possible_actions;
}
else
{
context->dest_window = NULL;
private->drop_xid = None;
context->action = 0;
}
/* Push a status event, to let the client know that
* the drag changed
*/
temp_event.dnd.type = GDK_DRAG_STATUS;
temp_event.dnd.window = 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 = context;
temp_event.dnd.time = time;
gdk_event_put (&temp_event);
}
else
{
private->old_action = context->suggested_action;
context->suggested_action = suggested_action;
}
/* Send a drag-motion event */
private->last_x = x_root;
private->last_y = y_root;
if (context->dest_window)
{
if (private->drag_status == GDK_DRAG_STATUS_DRAG)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_MOTIF:
motif_send_motion (context, x_root, y_root, suggested_action, time);
break;
case GDK_DRAG_PROTO_XDND:
xdnd_send_motion (context, x_root, y_root, 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.dnd.type = GDK_DRAG_STATUS;
temp_event.dnd.window = context->source_window;
temp_event.dnd.send_event = FALSE;
temp_event.dnd.context = context;
temp_event.dnd.time = time;
gdk_event_put (&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;
}
/**
* gdk_drag_drop:
* @context: a #GdkDragContext.
* @time_: the timestamp for this operation.
*
* Drops on the current destination.
*
* This function is called by the drag source.
**/
void
gdk_drag_drop (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_MOTIF:
motif_send_leave (context, time);
motif_send_drop (context, time);
break;
case GDK_DRAG_PROTO_XDND:
xdnd_send_drop (context, 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;
}
}
}
/**
* gdk_drag_abort:
* @context: a #GdkDragContext.
* @time_: the timestamp for this operation.
*
* Aborts a drag without dropping.
*
* This function is called by the drag source.
**/
void
gdk_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
gdk_drag_do_leave (context, time);
}
/* Destination side */
/**
* gdk_drag_status:
* @context: a #GdkDragContext.
* @action: the selected action which will be taken when a drop happens,
* or 0 to indicate that a drop will not be accepted.
* @time_: the timestamp for this operation.
*
* Selects one of the actions offered by the drag source.
*
* This function is called by the drag destination in response to
* gdk_drag_motion() called by the drag source.
**/
void
gdk_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivateX11 *private;
XEvent xev;
GdkDisplay *display;
g_return_if_fail (context != NULL);
private = PRIVATE_DATA (context);
display = GDK_DRAWABLE_DISPLAY (context->source_window);
context->action = action;
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
{
gboolean need_coords = FALSE;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display,
"_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
xev.xclient.window = GDK_DRAWABLE_XID (context->source_window);
if (private->drag_status == GDK_DRAG_STATUS_ACTION_WAIT)
{
MOTIF_XCLIENT_BYTE (&xev, 0) = XmOPERATION_CHANGED | 0x80;
}
else
{
if ((action != 0) != (private->old_action != 0))
{
if (action != 0)
{
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_SITE_ENTER | 0x80;
need_coords = TRUE;
}
else
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_SITE_LEAVE | 0x80;
}
else
{
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDRAG_MOTION | 0x80;
need_coords = TRUE;
}
}
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
switch (action)
{
case GDK_ACTION_MOVE:
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_MOVE;
break;
case GDK_ACTION_COPY:
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_COPY;
break;
case GDK_ACTION_LINK:
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_LINK;
break;
default:
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_NOOP;
break;
}
if (action)
MOTIF_XCLIENT_SHORT (&xev, 1) |= (XmDROP_SITE_VALID << 4);
else
MOTIF_XCLIENT_SHORT (&xev, 1) |= (XmNO_DROP_SITE << 4);
MOTIF_XCLIENT_LONG (&xev, 1) = time;
if (need_coords)
{
MOTIF_XCLIENT_SHORT (&xev, 4) = private->last_x;
MOTIF_XCLIENT_SHORT (&xev, 5) = private->last_y;
}
else
MOTIF_XCLIENT_LONG (&xev, 2) = 0;
MOTIF_XCLIENT_LONG (&xev, 3) = 0;
MOTIF_XCLIENT_LONG (&xev, 4) = 0;
if (!_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->source_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->source_window)));
}
else 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_DRAWABLE_XID (context->source_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_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, context->source_window,
FALSE, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->source_window)));
}
private->old_action = action;
}
/**
* gdk_drop_reply:
* @context: a #GdkDragContext.
* @ok: %TRUE if the drop is accepted.
* @time_: the timestamp for this operation.
*
* Accepts or rejects a drop.
*
* This function is called by the drag destination in response
* to a drop initiated by the drag source.
**/
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
GdkDragContextPrivateX11 *private;
g_return_if_fail (context != NULL);
private = PRIVATE_DATA (context);
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
{
GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display,
"_MOTIF_DRAG_AND_DROP_MESSAGE");
xev.xclient.format = 8;
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_START | 0x80;
MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order;
if (ok)
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_COPY |
(XmDROP_SITE_VALID << 4) |
(XmDROP_NOOP << 8) |
(XmDROP << 12);
else
MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_NOOP |
(XmNO_DROP_SITE << 4) |
(XmDROP_NOOP << 8) |
(XmDROP_CANCEL << 12);
MOTIF_XCLIENT_SHORT (&xev, 2) = private->last_x;
MOTIF_XCLIENT_SHORT (&xev, 3) = private->last_y;
MOTIF_XCLIENT_LONG (&xev, 2) = 0;
MOTIF_XCLIENT_LONG (&xev, 3) = 0;
MOTIF_XCLIENT_LONG (&xev, 4) = 0;
_gdk_send_xevent (display,
GDK_DRAWABLE_XID (context->source_window),
FALSE, 0, &xev);
}
}
/**
* gdk_drop_finish:
* @context: a #GtkDragContext.
* @success: %TRUE if the data was successfully received.
* @time_: the timestamp for this operation.
*
* Ends the drag operation after a drop.
*
* This function is called by the drag destination.
**/
void
gdk_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
g_return_if_fail (context != NULL);
if (context->protocol == GDK_DRAG_PROTO_XDND)
{
GdkDisplay *display = GDK_DRAWABLE_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_DRAWABLE_XID (context->source_window);
xev.xclient.data.l[0] = GDK_DRAWABLE_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 (context, context->source_window,
FALSE, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_DRAWABLE_XID (context->source_window)));
}
}
void
gdk_window_register_dnd (GdkWindow *window)
{
static const gulong xdnd_version = 5;
MotifDragReceiverInfo info;
Atom motif_drag_receiver_info_atom;
GdkDisplay *display = gdk_drawable_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 Motif drag receiver information property */
motif_drag_receiver_info_atom = gdk_x11_get_xatom_by_name_for_display (display,
"_MOTIF_DRAG_RECEIVER_INFO");
/* initialize to zero to avoid writing uninitialized data to socket */
memset(&info, 0, sizeof(info));
info.byte_order = local_byte_order;
info.protocol_version = 0;
info.protocol_style = XmDRAG_DYNAMIC;
info.proxy_window = None;
info.num_drop_sites = 0;
info.total_size = sizeof(info);
XChangeProperty (GDK_DISPLAY_XDISPLAY (display), GDK_DRAWABLE_XID (window),
motif_drag_receiver_info_atom,
motif_drag_receiver_info_atom,
8, PropModeReplace,
(guchar *)&info,
sizeof (info));
/* Set XdndAware */
/* The property needs to be of type XA_ATOM, not XA_INTEGER. Blech */
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_DRAWABLE_XID (window),
gdk_x11_get_xatom_by_name_for_display (display, "XdndAware"),
XA_ATOM, 32, PropModeReplace,
(guchar *)&xdnd_version, 1);
}
/**
* gdk_drag_get_selection:
* @context: a #GdkDragContext.
*
* Returns the selection atom for the current source window.
*
* Return value: the selection atom.
**/
GdkAtom
gdk_drag_get_selection (GdkDragContext *context)
{
g_return_val_if_fail (context != NULL, GDK_NONE);
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
return gdk_x11_xatom_to_atom_for_display (GDK_DRAWABLE_DISPLAY (context->source_window),
(PRIVATE_DATA (context))->motif_selection);
else if (context->protocol == GDK_DRAG_PROTO_XDND)
return gdk_atom_intern_static_string ("XdndSelection");
else
return GDK_NONE;
}
/**
* gdk_drag_drop_succeeded:
* @context: a #GdkDragContext
*
* Returns whether the dropped data has been successfully
* transferred. This function is intended to be used while
* handling a %GDK_DROP_FINISHED event, its return value is
* meaningless at other times.
*
* Return value: %TRUE if the drop was successful.
*
* Since: 2.6
**/
gboolean
gdk_drag_drop_succeeded (GdkDragContext *context)
{
GdkDragContextPrivateX11 *private;
g_return_val_if_fail (context != NULL, FALSE);
private = PRIVATE_DATA (context);
return !private->drop_failed;
}
#define __GDK_DND_X11_C__
#include "gdkaliasdef.c"
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