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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <string.h>
#include "gdk.h"
#include "gdkprivate.h"
gint
gdk_selection_owner_set (GdkWindow *owner,
GdkAtom selection,
guint32 time,
gint send_event)
{
GdkWindowPrivate *private;
Display *xdisplay;
Window xwindow;
if (owner)
{
private = (GdkWindowPrivate*) owner;
xdisplay = private->xdisplay;
xwindow = private->xwindow;
}
else
{
xdisplay = gdk_display;
xwindow = None;
}
XSetSelectionOwner (xdisplay, selection, xwindow, time);
return (XGetSelectionOwner (xdisplay, selection) == xwindow);
}
GdkWindow*
gdk_selection_owner_get (GdkAtom selection)
{
Window xwindow;
xwindow = XGetSelectionOwner (gdk_display, selection);
if (xwindow == None)
return NULL;
return gdk_window_lookup (xwindow);
}
void
gdk_selection_convert (GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
guint32 time)
{
GdkWindowPrivate *private;
g_return_if_fail (requestor != NULL);
private = (GdkWindowPrivate*) requestor;
XConvertSelection (private->xdisplay, selection, target,
gdk_selection_property, private->xwindow, time);
}
gint
gdk_selection_property_get (GdkWindow *requestor,
guchar **data,
GdkAtom *ret_type,
gint *ret_format)
{
GdkWindowPrivate *private;
gulong nitems;
gulong nbytes;
gulong length;
GdkAtom prop_type;
gint prop_format;
guchar *t;
g_return_val_if_fail (requestor != NULL, 0);
/* If retrieved chunks are typically small, (and the ICCM says the
should be) it would be a win to try first with a buffer of
moderate length, to avoid two round trips to the server */
private = (GdkWindowPrivate*) requestor;
XGetWindowProperty (private->xdisplay, private->xwindow,
gdk_selection_property, 0, 0, False,
AnyPropertyType, &prop_type, &prop_format,
&nitems, &nbytes, &t);
if (ret_type)
*ret_type = prop_type;
if (ret_format)
*ret_format = prop_format;
if (prop_type == None)
{
*data = NULL;
return 0;
}
XFree (t);
/* Add on an extra byte to handle null termination. X guarantees
that t will be 1 longer than nbytes and null terminated */
length = nbytes + 1;
/* We can't delete the selection here, because it might be the INCR
protocol, in which case the client has to make sure they'll be
notified of PropertyChange events _before_ the property is deleted.
Otherwise there's no guarantee we'll win the race ... */
XGetWindowProperty (private->xdisplay, private->xwindow,
gdk_selection_property, 0, (nbytes + 3) / 4, False,
AnyPropertyType, &prop_type, &prop_format,
&nitems, &nbytes, &t);
if (prop_type != None)
{
*data = g_new (guchar, length);
memcpy (*data, t, length);
XFree (t);
return length-1;
}
else
{
*data = NULL;
return 0;
}
}
void
gdk_selection_send_notify (guint32 requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time)
{
XSelectionEvent xevent;
xevent.type = SelectionNotify;
xevent.serial = 0;
xevent.send_event = True;
xevent.display = gdk_display;
xevent.requestor = requestor;
xevent.selection = selection;
xevent.target = target;
xevent.property = property;
xevent.time = time;
XSendEvent (gdk_display, requestor, False, NoEventMask, (XEvent*) &xevent);
}
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