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gtk/gdk/gdkdnd.c
CST 1999 Shawn T. Amundson 279e878bdd Added notice to look in AUTHORS and ChangeLog files for a list of changes. 
Wed Feb 24 01:22:39 CST 1999 Shawn T. Amundson <amundson@gtk.org>

        * *.[ch]: Added notice to look in AUTHORS and ChangeLog files
	  for a list of changes.
1999-02-24 07:37:18 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. 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 <X11/Xlib.h>
#include <X11/Xatom.h>
#include <string.h>
#include "gdkx.h"
#include "gdk/gdkprivate.h"
#include "gdk.h"
#define NEW_DRAGS
typedef struct _GdkDragContextPrivate GdkDragContextPrivate;
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;
} GdkWindowCache;
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivate {
GdkDragContext context;
GdkAtom motif_selection;
GdkAtom xdnd_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;
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 */
GdkWindowCache *window_cache;
};
GdkDragContext *current_dest_drag = NULL;
/* Forward declarations */
static void gdk_window_cache_destroy (GdkWindowCache *cache);
static void motif_read_target_table (void);
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);
/* Drag Contexts */
static GList *contexts;
GdkDragContext *
gdk_drag_context_new (void)
{
GdkDragContextPrivate *result;
result = g_new0 (GdkDragContextPrivate, 1);
result->ref_count = 1;
contexts = g_list_prepend (contexts, result);
return (GdkDragContext *)result;
}
void
gdk_drag_context_ref (GdkDragContext *context)
{
g_return_if_fail (context != NULL);
((GdkDragContextPrivate *)context)->ref_count++;
}
void
gdk_drag_context_unref (GdkDragContext *context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
g_return_if_fail (context != NULL);
private->ref_count--;
if (private->ref_count == 0)
{
g_dataset_destroy (private);
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);
gdk_window_unref (context->source_window);
}
if (context->dest_window)
gdk_window_unref (context->dest_window);
if (private->window_cache)
gdk_window_cache_destroy (private->window_cache);
contexts = g_list_remove (contexts, private);
g_free (private);
}
}
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
Window source_xid,
Window dest_xid)
{
GList *tmp_list = contexts;
GdkDragContext *context;
GdkDragContextPrivate *private;
Window context_dest_xid;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
private = (GdkDragContextPrivate *)context;
context_dest_xid = context->dest_window ?
(private->dest_xid ?
private->dest_xid :
GDK_WINDOW_XWINDOW (context->dest_window)) :
None;
if ((!context->is_source == !is_source) &&
((source_xid == None) || (context->source_window &&
(GDK_WINDOW_XWINDOW (context->source_window) == source_xid))) &&
((dest_xid == None) || (context_dest_xid == dest_xid)))
return context;
tmp_list = tmp_list->next;
}
return NULL;
}
/* 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->prev != above_node)
{
cache->children = g_list_remove_link (cache->children, node);
node->next = above_node->next;
if (node->next)
node->next->prev = node;
node->prev = above_node;
above_node->next = 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 (void)
{
XWindowAttributes xwa;
Window root, parent, *children;
unsigned int nchildren;
int i;
gint old_warnings = gdk_error_warnings;
GdkWindowCache *result = g_new (GdkWindowCache, 1);
result->children = NULL;
result->child_hash = g_hash_table_new (g_direct_hash, NULL);
XGetWindowAttributes (gdk_display, gdk_root_window, &xwa);
result->old_event_mask = xwa.your_event_mask;
XSelectInput (gdk_display, gdk_root_window,
result->old_event_mask | SubstructureNotifyMask);
gdk_window_add_filter ((GdkWindow *)&gdk_root_parent,
gdk_window_cache_filter, result);
gdk_error_code = 0;
gdk_error_warnings = 0;
if (XQueryTree(gdk_display, gdk_root_window,
&root, &parent, &children, &nchildren) == 0)
return result;
for (i = 0; i < nchildren ; i++)
{
XGetWindowAttributes (gdk_display, children[i], &xwa);
gdk_window_cache_add (result, children[i],
xwa.x, xwa.y, xwa.width, xwa.height,
xwa.map_state != IsUnmapped);
if (gdk_error_code != 0)
gdk_error_code = 0;
else
{
gdk_window_cache_add (result, children[i],
xwa.x, xwa.y, xwa.width, xwa.height,
(xwa.map_state != IsUnmapped));
}
}
XFree (children);
gdk_error_warnings = old_warnings;
return result;
}
static void
gdk_window_cache_destroy (GdkWindowCache *cache)
{
XSelectInput (gdk_display, gdk_root_window, cache->old_event_mask);
gdk_window_remove_filter ((GdkWindow *)&gdk_root_parent,
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 (Window win,
gint x,
gint y)
{
Window root, tmp_parent, *children;
unsigned int nchildren;
int i;
Window child = None;
Atom type = None;
int format;
unsigned long nitems, after;
unsigned char *data;
static Atom wm_state_atom = None;
if (!wm_state_atom)
wm_state_atom = gdk_atom_intern ("WM_STATE", FALSE);
XGetWindowProperty (gdk_display, win,
wm_state_atom, 0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data);
if (gdk_error_code != 0)
{
gdk_error_code = 0;
return None;
}
if (type != None)
{
XFree (data);
return win;
}
#if 0
/* This is beautiful! Damn Enlightenment and click-to-focus */
XTranslateCoordinates (gdk_display, gdk_root_window, win,
x_root, y_root, &dest_x, &dest_y, &child);
if (gdk_error_code != 0)
{
gdk_error_code = 0;
return None;
}
#else
if (XQueryTree(gdk_display, win,
&root, &tmp_parent, &children, &nchildren) == 0)
return 0;
if (gdk_error_code == 0)
{
for (i = nchildren - 1; (i >= 0) && (child == None); i--)
{
XWindowAttributes xwa;
XGetWindowAttributes (gdk_display, children[i], &xwa);
if (gdk_error_code != 0)
gdk_error_code = 0;
else if ((xwa.map_state == IsViewable) && (xwa.class == InputOutput) &&
(x >= xwa.x) && (x < xwa.x + (gint)xwa.width) &&
(y >= xwa.y) && (y < xwa.y + (gint)xwa.height))
{
x -= xwa.x;
y -= xwa.y;
child = children[i];
}
}
XFree (children);
}
else
gdk_error_code = 0;
#endif
if (child)
return get_client_window_at_coords_recurse (child, 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;
gint old_warnings = gdk_error_warnings;
gdk_error_code = 0;
gdk_error_warnings = 0;
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 (child->xid,
x_root - child->x,
y_root - child->y);
if (!retval)
retval = child->xid;
}
}
tmp_list = tmp_list->next;
}
gdk_error_warnings = old_warnings;
if (retval)
return retval;
else
return gdk_root_window;
}
#if 0
static Window
get_client_window_at_coords_recurse (Window win,
gint x_root,
gint y_root)
{
Window child;
Atom type = None;
int format;
unsigned long nitems, after;
unsigned char *data;
int dest_x, dest_y;
static Atom wm_state_atom = None;
if (!wm_state_atom)
wm_state_atom = gdk_atom_intern ("WM_STATE", FALSE);
XGetWindowProperty (gdk_display, win,
wm_state_atom, 0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data);
if (gdk_error_code != 0)
{
gdk_error_code = 0;
return None;
}
if (type != None)
{
XFree (data);
return win;
}
XTranslateCoordinates (gdk_display, gdk_root_window, win,
x_root, y_root, &dest_x, &dest_y, &child);
if (gdk_error_code != 0)
{
gdk_error_code = 0;
return None;
}
if (child)
return get_client_window_at_coords_recurse (child, x_root, y_root);
else
return None;
}
static Window
get_client_window_at_coords (Window ignore,
gint x_root,
gint y_root)
{
Window root, parent, *children;
unsigned int nchildren;
int i;
Window retval = None;
gint old_warnings = gdk_error_warnings;
gdk_error_code = 0;
gdk_error_warnings = 0;
if (XQueryTree(gdk_display, gdk_root_window,
&root, &parent, &children, &nchildren) == 0)
return 0;
for (i = nchildren - 1; (i >= 0) && (retval == None); i--)
{
if (children[i] != ignore)
{
XWindowAttributes xwa;
XGetWindowAttributes (gdk_display, children[i], &xwa);
if (gdk_error_code != 0)
gdk_error_code = 0;
else if ((xwa.map_state == IsViewable) &&
(x_root >= xwa.x) && (x_root < xwa.x + (gint)xwa.width) &&
(y_root >= xwa.y) && (y_root < xwa.y + (gint)xwa.height))
{
retval = get_client_window_at_coords_recurse (children[i],
x_root, y_root);
if (!retval)
retval = children[i];
}
}
}
XFree (children);
gdk_error_warnings = old_warnings;
if (retval)
return retval;
else
return gdk_root_window;
}
#endif
/*************************************************************
***************************** 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
};
/* Static data for MOTIF DND */
static GList **motif_target_lists = NULL;
static gint motif_n_target_lists = -1;
/* 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 (GPOINTER_TO_INT (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;
static Window motif_drag_window = None;
static GdkWindow *motif_drag_gdk_window = NULL;
static GdkAtom motif_drag_targets_atom = GDK_NONE;
static GdkAtom motif_drag_receiver_info_atom = GDK_NONE;
/* Target table handling */
GdkFilterReturn
motif_drag_window_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
XEvent *xev = (XEvent *)xevent;
switch (xev->xany.type)
{
case DestroyNotify:
motif_drag_window = None;
motif_drag_gdk_window = NULL;
break;
case PropertyNotify:
if (motif_target_lists &&
motif_drag_targets_atom &&
(xev->xproperty.atom == motif_drag_targets_atom))
motif_read_target_table();
break;
}
return GDK_FILTER_REMOVE;
}
static Atom motif_drag_window_atom = GDK_NONE;
static Window
motif_lookup_drag_window (Display *display)
{
Window retval = None;
gulong bytes_after, nitems;
GdkAtom type;
gint format;
guchar *data;
XGetWindowProperty (gdk_display, gdk_root_window, motif_drag_window_atom,
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", 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.
*/
Window
motif_find_drag_window (gboolean create)
{
if (!motif_drag_window)
{
if (!motif_drag_window_atom)
motif_drag_window_atom = gdk_atom_intern ("_MOTIF_DRAG_WINDOW", TRUE);
motif_drag_window = motif_lookup_drag_window (gdk_display);
if (!motif_drag_window && create)
{
/* Create a persistant window. (Copied from LessTif) */
Display *display;
XSetWindowAttributes attr;
display = XOpenDisplay (NULL);
XSetCloseDownMode (display, RetainPermanent);
XGrabServer (display);
motif_drag_window = motif_lookup_drag_window (display);
if (!motif_drag_window)
{
attr.override_redirect = True;
attr.event_mask = PropertyChangeMask;
motif_drag_window =
XCreateWindow(display, DefaultRootWindow(display),
-100, -100, 10, 10, 0, 0,
InputOnly, CopyFromParent,
(CWOverrideRedirect | CWEventMask), &attr);
GDK_NOTE (DND,
g_message ("Created drag window %#lx\n", motif_drag_window));
XChangeProperty (display, gdk_root_window,
motif_drag_window_atom, XA_WINDOW,
32, PropModeReplace,
(guchar *)&motif_drag_window_atom, 1);
}
XUngrabServer (display);
XCloseDisplay (display);
}
/* There is a miniscule race condition here if the drag window
* gets destroyed exactly now.
*/
if (motif_drag_window)
{
motif_drag_gdk_window = gdk_window_foreign_new (motif_drag_window);
gdk_window_add_filter (motif_drag_gdk_window,
motif_drag_window_filter,
NULL);
}
}
return motif_drag_window;
}
static void
motif_read_target_table (void)
{
gulong bytes_after, nitems;
GdkAtom type;
gint format;
gint i, j;
if (!motif_drag_targets_atom)
motif_drag_targets_atom = gdk_atom_intern ("_MOTIF_DRAG_TARGETS", FALSE);
if (motif_target_lists)
{
for (i=0; i<motif_n_target_lists; i++)
g_list_free (motif_target_lists[i]);
g_free (motif_target_lists);
motif_target_lists = NULL;
motif_n_target_lists = 0;
}
if (motif_find_drag_window (FALSE))
{
MotifTargetTableHeader *header = NULL;
guchar *target_bytes = NULL;
guchar *p;
gboolean success = FALSE;
XGetWindowProperty (gdk_display, motif_drag_window,
motif_drag_targets_atom,
0, (sizeof(MotifTargetTableHeader)+3)/4, FALSE,
motif_drag_targets_atom,
&type, &format, &nitems, &bytes_after,
(guchar **)&header);
if ((format != 8) || (nitems < sizeof (MotifTargetTableHeader)))
goto error;
header->n_lists = card16_to_host (header->n_lists, header->byte_order);
header->total_size = card32_to_host (header->total_size, header->byte_order);
XGetWindowProperty (gdk_display, 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 ((format != 8) || (bytes_after != 0) ||
(nitems != header->total_size - sizeof(MotifTargetTableHeader)))
goto error;
motif_n_target_lists = header->n_lists;
motif_target_lists = g_new0 (GList *, 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++)
motif_target_lists[i] =
g_list_prepend (motif_target_lists[i],
GUINT_TO_POINTER (card32_to_host (targets[j],
header->byte_order)));
g_free (targets);
motif_target_lists[i] = g_list_reverse (motif_target_lists[i]);
}
success = TRUE;
error:
if (header)
XFree (header);
if (target_bytes)
XFree (target_bytes);
if (!success)
{
if (motif_target_lists)
{
g_free (motif_target_lists);
motif_target_lists = NULL;
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 gboolean
motif_target_table_check (GList *sorted)
{
GList *tmp_list1, *tmp_list2;
gint i;
for (i=0; i<motif_n_target_lists; i++)
{
tmp_list1 = 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 (GList *targets)
{
GList *sorted = NULL;
gint index = -1;
gint i;
GList *tmp_list;
/* make a sorted copy of the list */
while (targets)
{
sorted = g_list_insert_sorted (sorted, targets->data, targets_sort_func);
targets = targets->next;
}
/* First check if it is their already */
if (motif_target_lists)
index = motif_target_table_check (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 (TRUE);
XGrabServer(gdk_display);
motif_read_target_table();
/* Check again, in case it was added in the meantime */
if (motif_target_lists)
index = motif_target_table_check (sorted);
if (index < 0)
{
guint32 total_size = 0;
guchar *data;
guchar *p;
guint16 *p16;
MotifTargetTableHeader *header;
if (!motif_target_lists)
{
motif_target_lists = g_new (GList *, 1);
motif_n_target_lists = 1;
}
else
{
motif_n_target_lists++;
motif_target_lists = g_realloc (motif_target_lists,
sizeof(GList *) * motif_n_target_lists);
}
motif_target_lists[motif_n_target_lists - 1] = sorted;
sorted = NULL;
index = motif_n_target_lists - 1;
total_size = sizeof (MotifTargetTableHeader);
for (i = 0; i < motif_n_target_lists ; i++)
total_size += sizeof(guint16) + sizeof(guint32) * g_list_length (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 = motif_n_target_lists;
header->total_size = total_size;
for (i = 0; i < motif_n_target_lists ; i++)
{
guint16 n_targets = g_list_length (motif_target_lists[i]);
guint32 *targets = g_new (guint32, n_targets);
guint32 *p32 = targets;
tmp_list = 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 (gdk_display, motif_drag_window,
motif_drag_targets_atom,
motif_drag_targets_atom,
8, PropModeReplace,
data, total_size);
}
XUngrabServer(gdk_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)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
MotifDragInitiatorInfo info;
gint i;
static GdkAtom motif_drag_initiator_info = GDK_NONE;
if (!motif_drag_initiator_info)
motif_drag_initiator_info = gdk_atom_intern ("_MOTIF_DRAG_INITIATOR_INFO", FALSE);
info.byte_order = local_byte_order;
info.protocol_version = 0;
info.targets_index = motif_add_to_target_table (context->targets);
for (i=0; ; i++)
{
gchar buf[20];
g_snprintf(buf, 20, "_GDK_SELECTION_%d", i);
private->motif_selection = gdk_atom_intern (buf, FALSE);
if (!XGetSelectionOwner (gdk_display, private->motif_selection))
break;
}
info.selection_atom = private->motif_selection;
XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XWINDOW (context->source_window),
private->motif_selection,
motif_drag_initiator_info, 8, PropModeReplace,
(guchar *)&info, sizeof (info));
private->motif_targets_set = 1;
}
guint32
motif_check_dest (Window win)
{
gboolean retval = FALSE;
MotifDragReceiverInfo *info;
Atom type = None;
int format;
unsigned long nitems, after;
if (!motif_drag_receiver_info_atom)
motif_drag_receiver_info_atom = gdk_atom_intern ("_MOTIF_DRAG_RECEIVER_INFO", FALSE);
XGetWindowProperty (gdk_display, win,
motif_drag_receiver_info_atom,
0, (sizeof(*info)+3)/4, False, AnyPropertyType,
&type, &format, &nitems, &after,
(guchar **)&info);
if (type != None)
{
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 : GDK_NONE;
}
static void
motif_send_enter (GdkDragContext *context,
guint32 time)
{
XEvent xev;
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
xev.xclient.format = 8;
xev.xclient.window = GDK_WINDOW_XWINDOW (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_WINDOW_XWINDOW (context->source_window);
if (!private->motif_targets_set)
motif_set_targets (context);
MOTIF_XCLIENT_LONG (&xev, 3) = private->motif_selection;
if (!gdk_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
}
static void
motif_send_leave (GdkDragContext *context,
guint32 time)
{
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
xev.xclient.format = 8;
xev.xclient.window = GDK_WINDOW_XWINDOW (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) = GDK_WINDOW_XWINDOW (context->source_window);
MOTIF_XCLIENT_LONG (&xev, 3) = 0;
if (!gdk_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
}
static gboolean
motif_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
gboolean retval;
XEvent xev;
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
xev.xclient.format = 8;
xev.xclient.window = GDK_WINDOW_XWINDOW (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;
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 (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
return retval;
}
static void
motif_send_drop (GdkDragContext *context, guint32 time)
{
XEvent xev;
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
xev.xclient.format = 8;
xev.xclient.window = GDK_WINDOW_XWINDOW (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_WINDOW_XWINDOW (context->source_window);
if (!gdk_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
}
/* Target Side */
static gboolean
motif_read_initiator_info (Window source_window,
Atom atom,
GList **targets,
GdkAtom *selection)
{
GList *tmp_list;
static GdkAtom motif_drag_initiator_info = GDK_NONE;
GdkAtom type;
gint format;
gulong nitems;
gulong bytes_after;
MotifDragInitiatorInfo *initiator_info;
if (!motif_drag_initiator_info)
motif_drag_initiator_info = gdk_atom_intern ("_MOTIF_DRAG_INITIATOR_INFO", FALSE);
XGetWindowProperty (gdk_display, source_window, atom,
0, sizeof(*initiator_info), FALSE,
motif_drag_initiator_info,
&type, &format, &nitems, &bytes_after,
(guchar **)&initiator_info);
if ((format != 8) || (nitems != sizeof (MotifDragInitiatorInfo)) || (bytes_after != 0))
{
g_warning ("Error reading initiator info\n");
return FALSE;
}
motif_read_target_table ();
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 >= motif_n_target_lists)
{
g_warning ("Invalid target index in TOP_LEVEL_ENTER MESSAGE");
XFree (initiator_info);
return GDK_FILTER_REMOVE;
}
tmp_list = g_list_last (motif_target_lists[initiator_info->targets_index]);
*targets = NULL;
while (tmp_list)
{
*targets = g_list_prepend (*targets,
tmp_list->data);
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;
GdkDragContextPrivate *private;
/* FIXME, current_dest_drag really shouldn't be NULL'd
* if we error below.
*/
if (current_dest_drag != NULL)
{
if (timestamp >= current_dest_drag->start_time)
{
gdk_drag_context_unref (current_dest_drag);
current_dest_drag = NULL;
}
else
return NULL;
}
new_context = gdk_drag_context_new ();
private = (GdkDragContextPrivate *)new_context;
new_context->protocol = GDK_DRAG_PROTO_MOTIF;
new_context->is_source = FALSE;
new_context->source_window = gdk_window_lookup (source_window);
if (new_context->source_window)
gdk_window_ref (new_context->source_window);
else
{
new_context->source_window = gdk_window_foreign_new (source_window);
if (!new_context->source_window)
{
gdk_drag_context_unref (new_context);
return NULL;
}
}
new_context->dest_window = dest_window;
gdk_window_ref (dest_window);
new_context->start_time = timestamp;
if (!motif_read_initiator_info(source_window,
atom,
&new_context->targets,
&private->motif_selection))
{
gdk_drag_context_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)
{
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;
gdk_drag_context_ref (new_context);
current_dest_drag = new_context;
return GDK_FILTER_TRANSLATE;
}
GdkFilterReturn
motif_top_level_leave (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GDK_NOTE(DND, g_message ("Motif DND top level leave: flags: %#4x time: %d",
flags, timestamp));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= current_dest_drag->start_time))
{
event->dnd.type = GDK_DRAG_LEAVE;
/* Pass ownership of context to the event */
event->dnd.context = current_dest_drag;
current_dest_drag = NULL;
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_REMOVE;
}
GdkFilterReturn
motif_motion (GdkEvent *event,
guint16 flags,
guint32 timestamp,
gint16 x_root,
gint16 y_root)
{
GdkDragContextPrivate *private;
GDK_NOTE(DND, g_message ("Motif DND motion: flags: %#4x time: %d (%d, %d)",
flags, timestamp, x_root, y_root));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= current_dest_drag->start_time))
{
private = (GdkDragContextPrivate *)current_dest_drag;
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
event->dnd.time = timestamp;
motif_dnd_translate_flags (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;
}
GdkFilterReturn
motif_operation_changed (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GdkDragContextPrivate *private;
GDK_NOTE(DND, g_message ("Motif DND operation changed: flags: %#4x time: %d",
flags, timestamp));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) &&
(timestamp >= current_dest_drag->start_time))
{
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.send_event = FALSE;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
event->dnd.time = timestamp;
private = (GdkDragContextPrivate *)current_dest_drag;
motif_dnd_translate_flags (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;
}
GdkFilterReturn
motif_drop_start (GdkEvent *event,
guint16 flags,
guint32 timestamp,
guint32 source_window,
guint32 atom,
gint16 x_root,
gint16 y_root)
{
GdkDragContext *new_context;
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_drag_context_ref (new_context);
current_dest_drag = new_context;
return GDK_FILTER_TRANSLATE;
}
GdkFilterReturn
motif_drag_status (GdkEvent *event,
guint16 flags,
guint32 timestamp)
{
GdkDragContext *context;
GDK_NOTE (DND,
g_message ("Motif status message: flags %x", flags));
context = gdk_drag_context_find (TRUE,
GDK_WINDOW_XWINDOW (event->any.window),
None);
if (context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)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;
gdk_drag_context_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;
}
GdkFilterReturn
motif_dnd_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint8 reason;
guint16 flags;
guint32 timestamp;
guint32 source_window;
GdkAtom atom;
gint16 x_root, y_root;
gboolean is_reply;
/* 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 {
gchar *name;
GdkAtom atom;
GdkDragAction action;
} xdnd_actions_table[] = {
{ "XdndActionCopy", GDK_NONE, GDK_ACTION_COPY },
{ "XdndActionMove", GDK_NONE, GDK_ACTION_MOVE },
{ "XdndActionLink", GDK_NONE, GDK_ACTION_LINK },
{ "XdndActionAsk", GDK_NONE, GDK_ACTION_ASK },
{ "XdndActionPrivate", GDK_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 (xdnd_actions_table[i].name, FALSE);
}
static GdkDragAction
xdnd_action_from_atom (GdkAtom atom)
{
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 GdkAtom
xdnd_action_to_atom (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 xdnd_actions_table[i].atom;
return GDK_NONE;
}
static GdkAtom xdnd_aware_atom = GDK_NONE;
/* Source side */
static GdkFilterReturn
xdnd_status_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
guint32 flags = xevent->xclient.data.l[1];
GdkAtom action = xevent->xclient.data.l[4];
GdkDragContext *context;
GDK_NOTE (DND,
g_message ("XdndStatus: dest_window: %#x action: %ld",
dest_window, action));
context = gdk_drag_context_find (TRUE, xevent->xclient.window, dest_window);
if (context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)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;
gdk_drag_context_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 (action);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_finished_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
GdkDragContext *context;
GDK_NOTE (DND,
g_message ("XdndFinished: dest_window: %#x", dest_window));
context = gdk_drag_context_find (TRUE, xevent->xclient.window, dest_window);
if (context)
{
event->dnd.type = GDK_DROP_FINISHED;
event->dnd.context = context;
gdk_drag_context_ref (context);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static void
xdnd_set_targets (GdkDragContext *context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
GdkAtom *atomlist;
GList *tmp_list = context->targets;
gint i;
gint n_atoms = g_list_length (context->targets);
atomlist = g_new (GdkAtom, n_atoms);
i = 0;
while (tmp_list)
{
atomlist[i] = GPOINTER_TO_INT (tmp_list->data);
tmp_list = tmp_list->next;
i++;
}
XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XWINDOW (context->source_window),
gdk_atom_intern ("XdndTypeList", FALSE),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
private->xdnd_targets_set = 1;
}
static void
xdnd_set_actions (GdkDragContext *context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
GdkAtom *atomlist;
gint i;
gint n_atoms;
guint actions;
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 (GdkAtom, 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] = xdnd_actions_table[i].atom;
n_atoms++;
}
}
XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XWINDOW (context->source_window),
gdk_atom_intern ("XdndActionList", FALSE),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
private->xdnd_actions_set = 1;
private->xdnd_actions = context->actions;
}
/*************************************************************
* xdnd_send_xevent:
* Like gdk_send_event, but if the target is the root
* window, sets an event mask of ButtonPressMask, otherwise
* an event mask of 0.
* arguments:
*
* results:
*************************************************************/
gint
xdnd_send_xevent (Window window, gboolean propagate,
XEvent *event_send)
{
if (window == gdk_root_window)
return gdk_send_xevent (window, propagate, ButtonPressMask, event_send);
else
return gdk_send_xevent (window, propagate, 0, event_send);
}
static void
xdnd_send_enter (GdkDragContext *context)
{
XEvent xev;
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndEnter", FALSE);
xev.xclient.format = 32;
#ifdef NEW_DRAGS
xev.xclient.window = private->dest_xid ?
private->dest_xid :
GDK_WINDOW_XWINDOW (context->dest_window);
#else
xev.xclient.window = GDK_WINDOW_XWINDOW (context->dest_window);
#endif
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (context->source_window);
xev.xclient.data.l[1] = (3 << 24); /* version */
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
if (!private->xdnd_selection)
private->xdnd_selection = gdk_atom_intern ("XdndSelection", FALSE);
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] = GPOINTER_TO_INT (tmp_list->data);
tmp_list = tmp_list->next;
i++;
}
}
if (!xdnd_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
gdk_window_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_leave (GdkDragContext *context)
{
XEvent xev;
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndLeave", FALSE);
xev.xclient.format = 32;
#ifdef NEW_DRAGS
xev.xclient.window = private->dest_xid ?
private->dest_xid :
GDK_WINDOW_XWINDOW (context->dest_window);
#else
xev.xclient.window = GDK_WINDOW_XWINDOW (context->dest_window);
#endif
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (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 (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
gdk_window_unref (context->dest_window);
context->dest_window = NULL;
}
}
static void
xdnd_send_drop (GdkDragContext *context, guint32 time)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndDrop", FALSE);
xev.xclient.format = 32;
#ifdef NEW_DRAGS
xev.xclient.window = private->dest_xid ?
private->dest_xid :
GDK_WINDOW_XWINDOW (context->dest_window);
#else
xev.xclient.window = GDK_WINDOW_XWINDOW (context->dest_window);
#endif
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (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 (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
gdk_window_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)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndPosition", FALSE);
xev.xclient.format = 32;
#ifdef NEW_DRAGS
xev.xclient.window = private->dest_xid ?
private->dest_xid :
GDK_WINDOW_XWINDOW (context->dest_window);
#else
xev.xclient.window = GDK_WINDOW_XWINDOW (context->dest_window);
#endif
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (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 (action);
if (!xdnd_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
FALSE, &xev))
{
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->dest_window)));
gdk_window_unref (context->dest_window);
context->dest_window = NULL;
}
private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
}
static guint32
xdnd_check_dest (Window win)
{
gboolean retval = FALSE;
Atom type = None;
int format;
unsigned long nitems, after;
GdkAtom *version;
Window *proxy_data;
Window proxy;
static GdkAtom xdnd_proxy_atom = GDK_NONE;
gint old_warnings = gdk_error_warnings;
if (!xdnd_proxy_atom)
xdnd_proxy_atom = gdk_atom_intern ("XdndProxy", FALSE);
if (!xdnd_aware_atom)
xdnd_aware_atom = gdk_atom_intern ("XdndAware", FALSE);
proxy = GDK_NONE;
gdk_error_code = 0;
gdk_error_warnings = 0;
XGetWindowProperty (gdk_display, win,
xdnd_proxy_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
(guchar **)&proxy_data);
if (!gdk_error_code)
{
if (type != None)
{
if ((format == 32) && (nitems == 1))
{
proxy = *proxy_data;
}
else
GDK_NOTE (DND,
g_warning ("Invalid XdndOwner property on window %ld\n", win));
XFree (proxy_data);
}
XGetWindowProperty (gdk_display, proxy ? proxy : win,
xdnd_aware_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
(guchar **)&version);
if (!gdk_error_code && type != None)
{
if ((format == 32) && (nitems == 1))
{
if (*version == 3)
retval = TRUE;
}
else
GDK_NOTE (DND,
g_warning ("Invalid XdndAware property on window %ld\n", win));
XFree (version);
}
}
gdk_error_warnings = old_warnings;
gdk_error_code = 0;
return retval ? (proxy ? proxy : win) : GDK_NONE;
}
/* Target side */
static void
xdnd_read_actions (GdkDragContext *context)
{
Atom type;
int format;
gulong nitems, after;
Atom *data;
gint i;
gint old_warnings = gdk_error_warnings;
gdk_error_code = 0;
gdk_error_warnings = 0;
/* Get the XdndActionList, if set */
XGetWindowProperty (GDK_WINDOW_XDISPLAY (context->source_window),
GDK_WINDOW_XWINDOW (context->source_window),
gdk_atom_intern ("XdndActionList", FALSE), 0, 65536,
False, XA_ATOM, &type, &format, &nitems,
&after, (guchar **)&data);
if (!gdk_error_code && (format == 32) && (type == XA_ATOM))
{
context->actions = 0;
for (i=0; i<nitems; i++)
context->actions |= xdnd_action_from_atom (data[i]);
((GdkDragContextPrivate *)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 */
XFree(data);
}
gdk_error_warnings = old_warnings;
gdk_error_code = 0;
}
/* 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;
if ((xevent->xany.type == PropertyNotify) &&
(xevent->xproperty.atom == gdk_atom_intern ("XdndActionList", FALSE)))
{
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)
{
gint old_warnings = 0; /* quiet gcc */
GdkWindowPrivate *private = (GdkWindowPrivate *)window;
gboolean is_foreign = (private->window_type == GDK_WINDOW_FOREIGN);
if (is_foreign)
{
old_warnings = gdk_error_warnings;
gdk_error_warnings = 0;
}
if (!private->destroyed)
{
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).
*/
}
}
if (is_foreign)
{
gdk_flush();
gdk_error_warnings = old_warnings;
}
}
static GdkFilterReturn
xdnd_enter_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer cb_data)
{
XEvent *xevent = (XEvent *)xev;
GdkDragContext *new_context;
gint i;
Atom type;
int format;
gulong nitems, after;
Atom *data;
guint32 source_window = xevent->xclient.data.l[0];
gboolean get_types = ((xevent->xclient.data.l[1] & 1) != 0);
gint version = (xevent->xclient.data.l[1] & 0xff000000) >> 24;
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 (current_dest_drag != NULL)
{
gdk_drag_context_unref (current_dest_drag);
current_dest_drag = NULL;
}
new_context = gdk_drag_context_new ();
new_context->protocol = GDK_DRAG_PROTO_XDND;
new_context->is_source = FALSE;
new_context->source_window = gdk_window_lookup (source_window);
if (new_context->source_window)
gdk_window_ref (new_context->source_window);
else
{
new_context->source_window = gdk_window_foreign_new (source_window);
if (!new_context->source_window)
{
gdk_drag_context_unref (new_context);
return GDK_FILTER_REMOVE;
}
}
new_context->dest_window = event->any.window;
gdk_window_ref (new_context->dest_window);
new_context->targets = NULL;
if (get_types)
{
XGetWindowProperty (GDK_WINDOW_XDISPLAY (event->any.window),
source_window,
gdk_atom_intern ("XdndTypeList", FALSE), 0, 65536,
False, XA_ATOM, &type, &format, &nitems,
&after, (guchar **)&data);
if ((format != 32) || (type != XA_ATOM))
{
gdk_drag_context_unref (new_context);
return GDK_FILTER_REMOVE;
}
for (i=0; i<nitems; i++)
new_context->targets = g_list_append (new_context->targets,
GUINT_TO_POINTER (data[i]));
XFree(data);
}
else
{
for (i=0; i<3; i++)
if (xevent->xclient.data.l[2+i])
new_context->targets = g_list_append (new_context->targets,
GUINT_TO_POINTER (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;
gdk_drag_context_ref (new_context);
current_dest_drag = new_context;
((GdkDragContextPrivate *)new_context)->xdnd_selection =
gdk_atom_intern ("XdndSelection", FALSE);
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];
GDK_NOTE (DND,
g_message ("XdndLeave: source_window: %#x",
source_window));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XWINDOW (current_dest_drag->source_window) == source_window))
{
event->dnd.type = GDK_DRAG_LEAVE;
/* Pass ownership of context to the event */
event->dnd.context = current_dest_drag;
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];
GdkAtom action = xevent->xclient.data.l[4];
GDK_NOTE (DND,
g_message ("XdndPosition: source_window: %#x position: (%d, %d) time: %d action: %ld",
source_window, x_root, y_root, time, action));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XWINDOW (current_dest_drag->source_window) == source_window))
{
event->dnd.type = GDK_DRAG_MOTION;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
event->dnd.time = time;
current_dest_drag->suggested_action = xdnd_action_from_atom (action);
if (!((GdkDragContextPrivate *)current_dest_drag)->xdnd_have_actions)
current_dest_drag->actions = current_dest_drag->suggested_action;
event->dnd.x_root = x_root;
event->dnd.y_root = y_root;
((GdkDragContextPrivate *)current_dest_drag)->last_x = x_root;
((GdkDragContextPrivate *)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];
GDK_NOTE (DND,
g_message ("XdndDrop: source_window: %#x time: %d",
source_window, time));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) &&
(GDK_WINDOW_XWINDOW (current_dest_drag->source_window) == source_window))
{
GdkDragContextPrivate *private;
private = (GdkDragContextPrivate *)current_dest_drag;
event->dnd.type = GDK_DROP_START;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
event->dnd.time = time;
event->dnd.x_root = private->last_x;
event->dnd.y_root = private->last_y;
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
/*************************************************************
************************** Public API ***********************
*************************************************************/
void
gdk_dnd_init (void)
{
init_byte_order();
gdk_add_client_message_filter (
gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE),
motif_dnd_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndEnter", FALSE),
xdnd_enter_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndLeave", FALSE),
xdnd_leave_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndPosition", FALSE),
xdnd_position_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndStatus", FALSE),
xdnd_status_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndFinished", FALSE),
xdnd_finished_filter, NULL);
gdk_add_client_message_filter (
gdk_atom_intern ("XdndDrop", FALSE),
xdnd_drop_filter, 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:
break;
}
gdk_window_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
GList *tmp_list;
GdkDragContext *new_context;
g_return_val_if_fail (window != NULL, NULL);
new_context = gdk_drag_context_new ();
new_context->is_source = TRUE;
new_context->source_window = window;
gdk_window_ref (window);
tmp_list = g_list_last (targets);
new_context->targets = NULL;
while (tmp_list)
{
new_context->targets = g_list_prepend (new_context->targets,
tmp_list->data);
tmp_list = tmp_list->prev;
}
new_context->actions = 0;
return new_context;
}
guint32
gdk_drag_get_protocol (guint32 xid,
GdkDragProtocol *protocol)
{
guint32 retval;
if ((retval = xdnd_check_dest (xid)))
{
*protocol = GDK_DRAG_PROTO_XDND;
GDK_NOTE (DND, g_message ("Entering dnd window %#x\n", xid));
return retval;
}
else if ((retval = motif_check_dest (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;
gint old_warnings = gdk_error_warnings;
Atom type = None;
int format;
unsigned long nitems, after;
unsigned char *data;
if (xid == gdk_root_window)
rootwin = TRUE;
if (!rootwin)
{
gdk_error_code = 0;
XGetWindowProperty (gdk_display, xid,
gdk_atom_intern ("ENLIGHTENMENT_DESKTOP", FALSE),
0, 0, False, AnyPropertyType,
&type, &format, &nitems, &after, &data);
if ((gdk_error_code == 0) && 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)
{
gdk_error_code = 0;
XGetWindowProperty (gdk_display, win,
gdk_atom_intern ("__SWM_VROOT", FALSE),
0, 0, False, AnyPropertyType,
&type, &format, &nitems, &data);
if ((gdk_error_code == 0) && type != None)
rootwin = TRUE;
}
#endif
gdk_error_warnings = old_warnings;
if (rootwin)
{
*protocol = GDK_DRAG_PROTO_ROOTWIN;
return xid;
}
}
*protocol = GDK_DRAG_PROTO_NONE;
return GDK_NONE;
}
void
gdk_drag_find_window (GdkDragContext *context,
GdkWindow *drag_window,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
Window dest;
g_return_if_fail (context != NULL);
if (!private->window_cache)
private->window_cache = gdk_window_cache_new();
dest = get_client_window_at_coords (private->window_cache,
drag_window ?
GDK_WINDOW_XWINDOW (drag_window) : GDK_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 */
if ((recipient = gdk_drag_get_protocol (dest, protocol)))
{
*dest_window = gdk_window_lookup (recipient);
if (*dest_window)
gdk_window_ref (*dest_window);
else
*dest_window = gdk_window_foreign_new (recipient);
}
else
*dest_window = NULL;
}
else
{
*dest_window = context->dest_window;
if (*dest_window)
gdk_window_ref (*dest_window);
*protocol = context->protocol;
}
}
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)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
g_return_val_if_fail (context != NULL, FALSE);
/* When we have a Xdnd target, make sure our XdndActionList
* matches the current actions;
*/
private->old_actions = context->actions;
context->actions = possible_actions;
if ((protocol == GDK_DRAG_PROTO_XDND) &&
(!private->xdnd_actions_set ||
private->xdnd_actions != possible_actions))
xdnd_set_actions (context);
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;
gdk_window_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:
break;
}
private->old_action = suggested_action;
context->suggested_action = suggested_action;
private->old_actions = possible_actions;
}
else
{
context->dest_window = NULL;
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;
if (g_list_find (context->targets,
GUINT_TO_POINTER (gdk_atom_intern ("application/x-rootwin-drop", FALSE))))
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;
}
}
else
return TRUE;
}
return FALSE;
}
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;
}
}
}
void
gdk_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
gdk_drag_do_leave (context, time);
}
/* Destination side */
void
gdk_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivate *private;
XEvent xev;
g_return_if_fail (context != NULL);
private = (GdkDragContextPrivate *)context;
context->action = action;
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
{
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
xev.xclient.format = 8;
xev.xclient.window = GDK_WINDOW_XWINDOW (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;
else
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_SITE_LEAVE | 0x80;
}
else
MOTIF_XCLIENT_BYTE (&xev, 0) = XmDRAG_MOTION | 0x80;
}
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;
MOTIF_XCLIENT_SHORT (&xev, 4) = private->last_x;
MOTIF_XCLIENT_SHORT (&xev, 5) = private->last_y;
if (!gdk_send_xevent (GDK_WINDOW_XWINDOW (context->source_window),
FALSE, 0, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->source_window)));
}
else if (context->protocol == GDK_DRAG_PROTO_XDND)
{
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndStatus", FALSE);
xev.xclient.format = 32;
xev.xclient.window = GDK_WINDOW_XWINDOW (context->source_window);
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (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 (action);
if (!xdnd_send_xevent (GDK_WINDOW_XWINDOW (context->source_window),
FALSE, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->source_window)));
}
private->old_action = action;
}
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
GdkDragContextPrivate *private;
g_return_if_fail (context != NULL);
private = (GdkDragContextPrivate *)context;
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
{
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE);
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;
gdk_send_xevent (GDK_WINDOW_XWINDOW (context->source_window),
FALSE, 0, &xev);
}
}
void
gdk_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
g_return_if_fail (context != NULL);
if (context->protocol == GDK_DRAG_PROTO_XDND)
{
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_atom_intern ("XdndFinished", FALSE);
xev.xclient.format = 32;
xev.xclient.window = GDK_WINDOW_XWINDOW (context->source_window);
xev.xclient.data.l[0] = GDK_WINDOW_XWINDOW (context->dest_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 (GDK_WINDOW_XWINDOW (context->source_window),
FALSE, &xev))
GDK_NOTE (DND,
g_message ("Send event to %lx failed",
GDK_WINDOW_XWINDOW (context->source_window)));
}
}
void
gdk_window_register_dnd (GdkWindow *window)
{
static gulong xdnd_version = 3;
MotifDragReceiverInfo info;
g_return_if_fail (window != NULL);
/* Set Motif drag receiver information property */
if (!motif_drag_receiver_info_atom)
motif_drag_receiver_info_atom = gdk_atom_intern ("_MOTIF_DRAG_RECEIVER_INFO", FALSE);
info.byte_order = local_byte_order;
info.protocol_version = 0;
info.protocol_style = XmDRAG_DYNAMIC;
info.proxy_window = GDK_NONE;
info.num_drop_sites = 0;
info.total_size = sizeof(info);
XChangeProperty (gdk_display, GDK_WINDOW_XWINDOW (window),
motif_drag_receiver_info_atom,
motif_drag_receiver_info_atom,
8, PropModeReplace,
(guchar *)&info,
sizeof (info));
/* Set XdndAware */
if (!xdnd_aware_atom)
xdnd_aware_atom = gdk_atom_intern ("XdndAware", FALSE);
/* The property needs to be of type XA_ATOM, not XA_INTEGER. Blech */
XChangeProperty (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XWINDOW (window),
xdnd_aware_atom, XA_ATOM,
32, PropModeReplace,
(guchar *)&xdnd_version, 1);
}
/*************************************************************
* gdk_drag_get_selection:
* Returns the selection atom for the current source window
* arguments:
*
* results:
*************************************************************/
GdkAtom
gdk_drag_get_selection (GdkDragContext *context)
{
g_return_val_if_fail (context != NULL, GDK_NONE);
if (context->protocol == GDK_DRAG_PROTO_MOTIF)
return ((GdkDragContextPrivate *)context)->motif_selection;
else if (context->protocol == GDK_DRAG_PROTO_XDND)
return ((GdkDragContextPrivate *)context)->xdnd_selection;
else
return GDK_NONE;
}
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