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gtk/gdk/x11/gdkdnd-x11.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/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/shape.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"
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;
gboolean shape_selected;
gboolean shape_valid;
cairo_region_t *shape;
} 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;
GdkDevice *device;
};
#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_set_device:
* @context: a #GdkDragContext
* @device: a #GdkDevice
*
* Associates a #GdkDevice to @context, so all Drag and Drop events
* for @context are emitted as if they came from this device.
**/
void
gdk_drag_context_set_device (GdkDragContext *context,
GdkDevice *device)
{
GdkDragContextPrivateX11 *private;
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_return_if_fail (GDK_IS_DEVICE (device));
private = PRIVATE_DATA (context);
if (private->device)
{
g_object_unref (private->device);
private->device = NULL;
}
if (device)
private->device = g_object_ref (device);
}
/**
* gdk_drag_context_get_device:
* @context: a #GdkDragContext
*
* Returns the #GdkDevice associated to the drag context.
*
* Returns: The #GdkDevice associated to @context.
**/
GdkDevice *
gdk_drag_context_get_device (GdkDragContext *context)
{
GdkDragContextPrivateX11 *private;
g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), NULL);
private = PRIVATE_DATA (context);
return private->device;
}
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
free_cache_child (GdkCacheChild *child,
GdkDisplay *display)
{
if (child->shape)
cairo_region_destroy (child->shape);
if (child->shape_selected && display)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, 0);
}
g_free (child);
}
static void
gdk_window_cache_add (GdkWindowCache *cache,
guint32 xid,
gint x, gint y, gint width, gint height,
gboolean mapped)
{
GdkCacheChild *child = g_new (GdkCacheChild, 1);
child->xid = xid;
child->x = x;
child->y = y;
child->width = width;
child->height = height;
child->mapped = mapped;
child->shape_selected = FALSE;
child->shape_valid = FALSE;
child->shape = NULL;
cache->children = g_list_prepend (cache->children, child);
g_hash_table_insert (cache->child_hash, GUINT_TO_POINTER (xid),
cache->children);
}
static GdkFilterReturn
gdk_window_cache_shape_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
GdkWindowCache *cache = data;
GdkDisplayX11 *display = GDK_DISPLAY_X11 (gdk_screen_get_display (cache->screen));
if (display->have_shapes &&
xevent->type == display->shape_event_base + ShapeNotify)
{
XShapeEvent *xse = (XShapeEvent*)xevent;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xse->window));
if (node)
{
GdkCacheChild *child = node->data;
child->shape_valid = FALSE;
if (child->shape)
{
cairo_region_destroy (child->shape);
child->shape = NULL;
}
}
return GDK_FILTER_REMOVE;
}
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn
gdk_window_cache_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
XEvent *xevent = (XEvent *)xev;
GdkWindowCache *cache = data;
switch (xevent->type)
{
case CirculateNotify:
break;
case ConfigureNotify:
{
XConfigureEvent *xce = &xevent->xconfigure;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->window));
if (node)
{
GdkCacheChild *child = node->data;
child->x = xce->x;
child->y = xce->y;
child->width = xce->width;
child->height = xce->height;
if (xce->above == None && (node->next))
{
GList *last = g_list_last (cache->children);
cache->children = g_list_remove_link (cache->children, node);
last->next = node;
node->next = NULL;
node->prev = last;
}
else
{
GList *above_node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->above));
if (above_node && node->next != above_node)
{
/* Put the window above (before in the list) above_node
*/
cache->children = g_list_remove_link (cache->children, node);
node->prev = above_node->prev;
if (node->prev)
node->prev->next = node;
else
cache->children = node;
node->next = above_node;
above_node->prev = node;
}
}
}
break;
}
case CreateNotify:
{
XCreateWindowEvent *xcwe = &xevent->xcreatewindow;
if (!g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xcwe->window)))
gdk_window_cache_add (cache, xcwe->window,
xcwe->x, xcwe->y, xcwe->width, xcwe->height,
FALSE);
break;
}
case DestroyNotify:
{
XDestroyWindowEvent *xdwe = &xevent->xdestroywindow;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
if (node)
{
GdkCacheChild *child = node->data;
g_hash_table_remove (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
cache->children = g_list_remove_link (cache->children, node);
/* window is destroyed, no need to disable ShapeNotify */
free_cache_child (child, NULL);
g_list_free_1 (node);
}
break;
}
case MapNotify:
{
XMapEvent *xme = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xme->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = TRUE;
}
break;
}
case ReparentNotify:
break;
case UnmapNotify:
{
XMapEvent *xume = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xume->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = FALSE;
}
break;
}
default:
return GDK_FILTER_CONTINUE;
}
return GDK_FILTER_REMOVE;
}
static GdkWindowCache *
gdk_window_cache_new (GdkScreen *screen)
{
XWindowAttributes xwa;
Display *xdisplay = GDK_SCREEN_XDISPLAY (screen);
GdkWindow *root_window = gdk_screen_get_root_window (screen);
GdkChildInfoX11 *children;
guint nchildren, i;
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);
gdk_window_add_filter (NULL, gdk_window_cache_shape_filter, result);
if (!_gdk_x11_get_window_child_info (gdk_screen_get_display (screen),
GDK_WINDOW_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);
gdk_window_remove_filter (NULL, gdk_window_cache_shape_filter, cache);
gdk_error_trap_push ();
g_list_foreach (cache->children, (GFunc)free_cache_child,
gdk_screen_get_display (cache->screen));
gdk_flush ();
gdk_error_trap_pop ();
g_list_free (cache->children);
g_hash_table_destroy (cache->child_hash);
g_free (cache);
}
static gboolean
is_pointer_within_shape (GdkDisplay *display,
GdkCacheChild *child,
gint x_pos,
gint y_pos)
{
if (!child->shape_selected)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, ShapeNotifyMask);
child->shape_selected = TRUE;
}
if (!child->shape_valid)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
cairo_region_t *input_shape;
child->shape = _xwindow_get_shape (display_x11->xdisplay,
child->xid, ShapeBounding);
#ifdef ShapeInput
input_shape = _xwindow_get_shape (display_x11->xdisplay,
child->xid, ShapeInput);
if (child->shape && input_shape)
{
cairo_region_intersect (child->shape, input_shape);
cairo_region_destroy (input_shape);
}
else if (input_shape)
{
child->shape = input_shape;
}
#endif
child->shape_valid = TRUE;
}
return child->shape == NULL ||
cairo_region_contains_point (child->shape, x_pos, y_pos);
}
static Window
get_client_window_at_coords_recurse (GdkDisplay *display,
Window win,
gboolean is_toplevel,
gint x,
gint y)
{
GdkChildInfoX11 *children;
unsigned int nchildren;
int i;
gboolean found_child = FALSE;
GdkChildInfoX11 child = { 0, };
gboolean has_wm_state = FALSE;
if (!_gdk_x11_get_window_child_info (display, win, TRUE,
is_toplevel? &has_wm_state : NULL,
&children, &nchildren))
return None;
if (has_wm_state)
{
g_free (children);
return win;
}
for (i = nchildren - 1; (i >= 0) && !found_child; i--)
{
GdkChildInfoX11 *cur_child = &children[i];
if ((cur_child->is_mapped) && (cur_child->window_class == InputOutput) &&
(x >= cur_child->x) && (x < cur_child->x + cur_child->width) &&
(y >= cur_child->y) && (y < cur_child->y + cur_child->height))
{
x -= cur_child->x;
y -= cur_child->y;
child = *cur_child;
found_child = TRUE;
}
}
g_free (children);
if (found_child)
{
if (child.has_wm_state)
return child.window;
else
return get_client_window_at_coords_recurse (display, child.window, FALSE, x, y);
}
else
return None;
}
static Window
get_client_window_at_coords (GdkWindowCache *cache,
Window ignore,
gint x_root,
gint y_root)
{
GList *tmp_list;
Window retval = None;
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))
{
GdkDisplay *display = gdk_screen_get_display (cache->screen);
if (!is_pointer_within_shape (display, child,
x_root - child->x,
y_root - child->y))
{
tmp_list = tmp_list->next;
continue;
}
retval = get_client_window_at_coords_recurse (display,
child->xid, TRUE,
x_root - child->x,
y_root - child->y);
if (!retval)
retval = child->xid;
}
}
tmp_list = tmp_list->next;
}
gdk_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;
gint i;
if (xatom == None)
return 0;
atom = gdk_x11_xatom_to_atom_for_display (display, xatom);
if (!xdnd_actions_initialized)
xdnd_initialize_actions();
for (i=0; i<xdnd_n_actions; i++)
if (atom == xdnd_actions_table[i].atom)
return xdnd_actions_table[i].action;
return 0;
}
static Atom
xdnd_action_to_atom (GdkDisplay *display,
GdkDragAction action)
{
gint i;
if (!xdnd_actions_initialized)
xdnd_initialize_actions();
for (i=0; i<xdnd_n_actions; i++)
if (action == xdnd_actions_table[i].action)
return gdk_x11_atom_to_xatom_for_display (display, xdnd_actions_table[i].atom);
return None;
}
/* Source side */
static GdkFilterReturn
xdnd_status_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDisplay *display;
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
guint32 flags = xevent->xclient.data.l[1];
Atom action = xevent->xclient.data.l[4];
GdkDragContext *context;
if (!event->any.window ||
gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN)
return GDK_FILTER_CONTINUE; /* Not for us */
GDK_NOTE (DND,
g_message ("XdndStatus: dest_window: %#x action: %ld",
dest_window, action));
display = gdk_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;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
if (!(action != 0) != !(flags & 1))
{
GDK_NOTE (DND,
g_warning ("Received status event with flags not corresponding to action!\n"));
action = 0;
}
context->action = xdnd_action_from_atom (display, action);
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_finished_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDisplay *display;
XEvent *xevent = (XEvent *)xev;
guint32 dest_window = xevent->xclient.data.l[0];
GdkDragContext *context;
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;
gdk_event_set_device (event, gdk_drag_context_get_device (context));
g_object_ref (context);
event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
return GDK_FILTER_TRANSLATE;
}
return GDK_FILTER_REMOVE;
}
static void
xdnd_set_targets (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 = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
temp_event->dnd.send_event = TRUE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = GDK_CURRENT_TIME;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
g_object_unref (context);
}
static GdkDisplay *
gdk_drag_context_get_display (GdkDragContext *context)
{
if (context->source_window)
return GDK_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 = gdk_event_new (GDK_NOTHING);
temp_event->any.window = g_object_ref (window);
if ((*xdnd_filters[i].func) (event_send, temp_event, NULL) == GDK_FILTER_TRANSLATE)
{
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
return TRUE;
}
}
}
xwindow = GDK_WINDOW_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;
/* FIXME: Should extend DnD protocol to have device info */
gdk_drag_context_set_device (new_context, gdk_display_get_core_pointer (display));
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;
gdk_event_set_device (event, gdk_drag_context_get_device (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;
gdk_event_set_device (event, gdk_drag_context_get_device (event->dnd.context));
display_x11->current_dest_drag = NULL;
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_REMOVE;
}
static GdkFilterReturn
xdnd_position_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
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;
gdk_event_set_device (event, gdk_drag_context_get_device (event->dnd.context));
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;
gdk_event_set_device (event, gdk_drag_context_get_device (event->dnd.context));
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 offered targets, as list of #GdkAtom<!-- -->s
*
* 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;
GdkDisplay *display;
GdkDevice *device;
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;
display = gdk_drawable_get_display (GDK_DRAWABLE (window));
device = gdk_display_get_core_pointer (display);
gdk_drag_context_set_device (new_context, device);
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: (out): location to store the destination window in.
* @protocol: (out): 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 = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
temp_event->dnd.send_event = TRUE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = time;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
else
{
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 = gdk_event_new (GDK_DRAG_STATUS);
temp_event->dnd.window = g_object_ref (context->source_window);
temp_event->dnd.send_event = FALSE;
temp_event->dnd.context = g_object_ref (context);
temp_event->dnd.time = time;
gdk_event_set_device (temp_event, gdk_drag_context_get_device (context));
gdk_event_put (temp_event);
gdk_event_free (temp_event);
}
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()");
break;
default:
break;
}
}
else
return TRUE;
}
return FALSE;
}
/**
* 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)));
}
}
/**
* gdk_window_register_dnd:
* @window: a #GdkWindow.
*
* Registers a window as a potential drop destination.
*/
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);
if (gdk_window_get_window_type (window) == GDK_WINDOW_OFFSCREEN)
return;
base_precache_atoms (display);
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
return;
else
g_object_set_data (G_OBJECT (window), "gdk-dnd-registered", GINT_TO_POINTER (TRUE));
/* Set 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;
}
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