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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, 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 <locale.h>
#include <stdlib.h>
#include <string.h>
#include "gdkalias.h"
#include "gdkx.h"
#include "gdk.h" /* For gdk_flush() */
#include "gdkx.h"
#include "gdkpixmap.h"
#include "gdkinternals.h"
#include "gdkdisplay-x11.h"
/* If this variable is FALSE, it indicates that we should
* avoid trying to use multibyte conversion functions and
* assume everything is 1-byte per character
*/
static gboolean gdk_use_mb;
void
_gdk_x11_initialize_locale (void)
{
wchar_t result;
gchar *current_locale;
static char *last_locale = NULL;
gdk_use_mb = FALSE;
current_locale = setlocale (LC_ALL, NULL);
if (last_locale && strcmp (last_locale, current_locale) == 0)
return;
g_free (last_locale);
last_locale = g_strdup (current_locale);
if (!XSupportsLocale ())
g_warning ("locale not supported by Xlib");
if (!XSetLocaleModifiers (""))
g_warning ("cannot set locale modifiers");
if ((strcmp (current_locale, "C")) && (strcmp (current_locale, "POSIX")))
{
gdk_use_mb = TRUE;
#ifndef X_LOCALE
/* Detect ancient GNU libc, where mb == UTF8. Not useful unless it's
* really a UTF8 locale. The below still probably will
* screw up on Greek, Cyrillic, etc, encoded as UTF8.
*/
if ((MB_CUR_MAX == 2) &&
(mbstowcs (&result, "\xdd\xa5", 1) > 0) &&
result == 0x765)
{
if ((strlen (current_locale) < 4) ||
g_ascii_strcasecmp (current_locale + strlen(current_locale) - 4,
"utf8"))
gdk_use_mb = FALSE;
}
#endif /* X_LOCALE */
}
GDK_NOTE (XIM,
g_message ("%s multi-byte string functions.",
gdk_use_mb ? "Using" : "Not using"));
return;
}
gchar*
gdk_set_locale (void)
{
if (!setlocale (LC_ALL,""))
g_warning ("locale not supported by C library");
_gdk_x11_initialize_locale ();
return setlocale (LC_ALL, NULL);
}
static GdkDisplay *
find_a_display (void)
{
GdkDisplay *display = gdk_display_get_default ();
if (!display)
display = _gdk_displays->data;
return display;
}
/**
* gdk_wcstombs:
* @src: a wide character string.
*
* Converts a wide character string to a multi-byte string.
* (The function name comes from an acronym of 'Wide Character String TO
* Multi-Byte String').
*
* Return value: the multi-byte string corresponding to @src, or %NULL if the
* conversion failed. The returned string should be freed with g_free() when no
* longer needed.
**/
gchar *
gdk_wcstombs (const GdkWChar *src)
{
gchar *mbstr;
if (gdk_use_mb)
{
GdkDisplay *display = find_a_display ();
Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
XTextProperty tpr;
if (sizeof(wchar_t) != sizeof(GdkWChar))
{
gint i;
wchar_t *src_alt;
for (i=0; src[i]; i++);
src_alt = g_new (wchar_t, i+1);
for (; i>=0; i--)
src_alt[i] = src[i];
if (XwcTextListToTextProperty (xdisplay, &src_alt, 1, XTextStyle, &tpr)
!= Success)
{
g_free (src_alt);
return NULL;
}
g_free (src_alt);
}
else
{
if (XwcTextListToTextProperty (xdisplay, (wchar_t**)&src, 1,
XTextStyle, &tpr) != Success)
{
return NULL;
}
}
/*
* We must copy the string into an area allocated by glib, because
* the string 'tpr.value' must be freed by XFree().
*/
mbstr = g_strdup(tpr.value);
XFree (tpr.value);
}
else
{
gint length = 0;
gint i;
while (src[length] != 0)
length++;
mbstr = g_new (gchar, length + 1);
for (i=0; i<length+1; i++)
mbstr[i] = src[i];
}
return mbstr;
}
/**
* gdk_mbstowcs:
* @dest: the space to place the converted wide character string into.
* @src: the multi-byte string to convert, which must be nul-terminated.
* @dest_max: the maximum number of wide characters to place in @dest.
*
* Converts a multi-byte string to a wide character string.
* (The function name comes from an acronym of 'Multi-Byte String TO Wide
* Character String').
*
* Return value: the number of wide characters written into @dest, or -1 if
* the conversion failed.
**/
gint
gdk_mbstowcs (GdkWChar *dest, const gchar *src, gint dest_max)
{
if (gdk_use_mb)
{
GdkDisplay *display = find_a_display ();
Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
XTextProperty tpr;
wchar_t **wstrs, *wstr_src;
gint num_wstrs;
gint len_cpy;
if (XmbTextListToTextProperty (xdisplay, (char **)&src, 1, XTextStyle,
&tpr)
!= Success)
{
/* NoMem or LocaleNotSupp */
return -1;
}
if (XwcTextPropertyToTextList (xdisplay, &tpr, &wstrs, &num_wstrs)
!= Success)
{
/* InvalidChar */
XFree(tpr.value);
return -1;
}
XFree(tpr.value);
if (num_wstrs == 0)
return 0;
wstr_src = wstrs[0];
for (len_cpy=0; len_cpy<dest_max && wstr_src[len_cpy]; len_cpy++)
dest[len_cpy] = wstr_src[len_cpy];
XwcFreeStringList (wstrs);
return len_cpy;
}
else
{
gint i;
for (i=0; i<dest_max && src[i]; i++)
dest[i] = src[i];
return i;
}
}
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