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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 Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdkinternals.h"
#include "gdkprivate-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkscreen-x11.h"
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <string.h>
static void
insert_atom_pair (GdkDisplay *display,
const char *string,
Atom xatom)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
char *s;
if (!display_x11->atom_from_string)
{
display_x11->atom_from_string = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
display_x11->atom_to_string = g_hash_table_new (NULL, NULL);
}
s = g_strdup (string);
g_hash_table_insert (display_x11->atom_from_string, s, GUINT_TO_POINTER (xatom));
g_hash_table_insert (display_x11->atom_to_string, GUINT_TO_POINTER (xatom), s);
}
static Atom
lookup_cached_xatom (GdkDisplay *display,
const char *string)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (display_x11->atom_from_string)
return GPOINTER_TO_UINT (g_hash_table_lookup (display_x11->atom_from_string, string));
return None;
}
/**
* gdk_x11_get_xatom_by_name_for_display:
* @display: (type GdkX11Display): a #GdkDisplay
* @atom_name: a string
*
* Returns the X atom for a #GdkDisplay corresponding to @atom_name.
* This function caches the result, so if called repeatedly it is much
* faster than XInternAtom(), which is a round trip to the server each time.
*
* Returns: a X atom for a #GdkDisplay
**/
Atom
gdk_x11_get_xatom_by_name_for_display (GdkDisplay *display,
const gchar *atom_name)
{
Atom xatom = None;
g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
if (atom_name == NULL)
return None;
if (gdk_display_is_closed (display))
return None;
xatom = lookup_cached_xatom (display, atom_name);
if (!xatom)
{
xatom = XInternAtom (GDK_DISPLAY_XDISPLAY (display), atom_name, FALSE);
insert_atom_pair (display, atom_name, xatom);
}
return xatom;
}
void
_gdk_x11_precache_atoms (GdkDisplay *display,
const gchar * const *atom_names,
int n_atoms)
{
Atom *xatoms;
const char **xatom_names;
int n_xatoms;
int i;
xatoms = g_new (Atom, n_atoms);
xatom_names = g_new (const char *, n_atoms);
n_xatoms = 0;
for (i = 0; i < n_atoms; i++)
{
if (lookup_cached_xatom (display, atom_names[i]) == None)
{
xatom_names[n_xatoms] = atom_names[i];
n_xatoms++;
}
}
if (n_xatoms)
XInternAtoms (GDK_DISPLAY_XDISPLAY (display),
(char **) xatom_names, n_xatoms, False, xatoms);
for (i = 0; i < n_xatoms; i++)
insert_atom_pair (display, xatom_names[i], xatoms[i]);
g_free (xatoms);
g_free (xatom_names);
}
/**
* gdk_x11_get_xatom_name_for_display:
* @display: (type GdkX11Display): the #GdkDisplay where @xatom is defined
* @xatom: an X atom
*
* Returns the name of an X atom for its display. This
* function is meant mainly for debugging, so for convenience, unlike
* XAtomName() and the result doesn’t need to
* be freed.
*
* Returns: name of the X atom; this string is owned by GDK,
* so it shouldn’t be modified or freed.
**/
const gchar *
gdk_x11_get_xatom_name_for_display (GdkDisplay *display,
Atom xatom)
{
GdkX11Display *display_x11;
const char *string;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
if (xatom == None)
return NULL;
if (gdk_display_is_closed (display))
return NULL;
display_x11 = GDK_X11_DISPLAY (display);
if (display_x11->atom_to_string)
string = g_hash_table_lookup (display_x11->atom_to_string,
GUINT_TO_POINTER (xatom));
else
string = NULL;
if (!string)
{
/* If this atom doesn't exist, we'll die with an X error unless
* we take precautions
*/
char *name;
gdk_x11_display_error_trap_push (display);
name = XGetAtomName (GDK_DISPLAY_XDISPLAY (display), xatom);
if (gdk_x11_display_error_trap_pop (display))
{
g_warning (G_STRLOC " invalid X atom: %ld", xatom);
}
else
{
insert_atom_pair (display, name, xatom);
XFree (name);
string = g_hash_table_lookup (display_x11->atom_to_string,
GUINT_TO_POINTER (xatom));
}
}
return string;
}
Atom
_gdk_x11_get_xatom_for_display_printf (GdkDisplay *display,
const gchar *format,
...)
{
va_list args;
char *atom_name;
Atom atom;
va_start (args, format);
atom_name = g_strdup_vprintf (format, args);
va_end (args);
atom = gdk_x11_get_xatom_by_name_for_display (display, atom_name);
g_free (atom_name);
return atom;
}
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