gtk2/gdk/x11/gdkproperty-x11.c
Benjamin Otte 920259c250 x11: Get rid of default Atom converters
No, using the default Wayland display is not okay to query Atoms.
2017-12-14 13:35:32 +01:00

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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 "gdkproperty.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,
GdkAtom virtual_atom,
Atom xatom)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (!display_x11->atom_from_virtual)
{
display_x11->atom_from_virtual = g_hash_table_new (g_direct_hash, NULL);
display_x11->atom_to_virtual = g_hash_table_new (g_direct_hash, NULL);
}
g_hash_table_insert (display_x11->atom_from_virtual, (gpointer)virtual_atom,
GUINT_TO_POINTER (xatom));
g_hash_table_insert (display_x11->atom_to_virtual,
GUINT_TO_POINTER (xatom), (gpointer)virtual_atom);
}
static Atom
lookup_cached_xatom (GdkDisplay *display,
GdkAtom atom)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
if (display_x11->atom_from_virtual)
return GPOINTER_TO_UINT (g_hash_table_lookup (display_x11->atom_from_virtual, atom));
return None;
}
/**
* gdk_x11_atom_to_xatom_for_display:
* @display: (type GdkX11Display): A #GdkDisplay
* @atom: A #GdkAtom, or %NULL
*
* Converts from a #GdkAtom to the X atom for a #GdkDisplay
* with the same string value. The special value %NULL
* is converted to %None.
*
* Returns: the X atom corresponding to @atom, or %None
*
* Since: 2.2
**/
Atom
gdk_x11_atom_to_xatom_for_display (GdkDisplay *display,
GdkAtom atom)
{
Atom xatom = None;
g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
if (atom == NULL)
return None;
if (gdk_display_is_closed (display))
return None;
xatom = lookup_cached_xatom (display, atom);
if (!xatom)
{
const char *name = (const char *)atom;
xatom = XInternAtom (GDK_DISPLAY_XDISPLAY (display), name, FALSE);
insert_atom_pair (display, atom, xatom);
}
return xatom;
}
void
_gdk_x11_precache_atoms (GdkDisplay *display,
const gchar * const *atom_names,
gint n_atoms)
{
Atom *xatoms;
GdkAtom *atoms;
const gchar **xatom_names;
gint n_xatoms;
gint i;
xatoms = g_new (Atom, n_atoms);
xatom_names = g_new (const gchar *, n_atoms);
atoms = g_new (GdkAtom, n_atoms);
n_xatoms = 0;
for (i = 0; i < n_atoms; i++)
{
GdkAtom atom = g_intern_static_string (atom_names[i]);
if (lookup_cached_xatom (display, atom) == None)
{
atoms[n_xatoms] = atom;
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, atoms[i], xatoms[i]);
g_free (xatoms);
g_free (xatom_names);
g_free (atoms);
}
/**
* gdk_x11_xatom_to_atom_for_display:
* @display: (type GdkX11Display): A #GdkDisplay
* @xatom: an X atom
*
* Convert from an X atom for a #GdkDisplay to the corresponding
* #GdkAtom.
*
* Returns: (transfer none): the corresponding #GdkAtom.
*
* Since: 2.2
**/
GdkAtom
gdk_x11_xatom_to_atom_for_display (GdkDisplay *display,
Atom xatom)
{
GdkX11Display *display_x11;
GdkAtom virtual_atom = NULL;
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_virtual)
virtual_atom = g_hash_table_lookup (display_x11->atom_to_virtual,
GUINT_TO_POINTER (xatom));
if (!virtual_atom)
{
/* 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
{
virtual_atom = g_intern_string (name);
XFree (name);
insert_atom_pair (display, virtual_atom, xatom);
}
}
return virtual_atom;
}
/**
* 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
*
* Since: 2.2
**/
Atom
gdk_x11_get_xatom_by_name_for_display (GdkDisplay *display,
const gchar *atom_name)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
return gdk_x11_atom_to_xatom_for_display (display, g_intern_string (atom_name));
}
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;
}
/**
* 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 doesnt need to
* be freed.
*
* Returns: name of the X atom; this string is owned by GDK,
* so it shouldnt be modifed or freed.
*
* Since: 2.2
**/
const gchar *
gdk_x11_get_xatom_name_for_display (GdkDisplay *display,
Atom xatom)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
return (const char *)gdk_x11_xatom_to_atom_for_display (display, xatom);
}