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0db4000945
gtk/gdk/win32/gdkselection-win32.c
Tor Lillqvist 0db4000945 Merge from gtk-1-3-win32-production and gtk-2-0: 
2002-09-12  Tor Lillqvist  <tml@iki.fi>

	Merge from gtk-1-3-win32-production and gtk-2-0:

	* gdk/win32/gdkinput-win32.c (gdk_input_init): Use
	GetSystemMetrics (SM_C[XY]SCREEN) instead of
	gdk_screen_{width,height}().

	* gdk/win32/gdkselection-win32.c (gdk_selection_convert): Don't
	use return value from GlobalSize() as length of string when
	calling MultiByteToWideChar(). Pass -1 instead (zero-terminated
	string). Thanks to Iwasa Kazmi.
2002-09-11 21:51:59 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-2002 Tor Lillqvist
*
* 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 <string.h>
#include <stdlib.h>
#include "gdkproperty.h"
#include "gdkselection.h"
#include "gdkdisplay.h"
#include "gdkprivate-win32.h"
/* We emulate the GDK_SELECTION window properties of windows (as used
* in the X11 backend) by using a hash table from GdkWindows to
* GdkSelProp structs.
*/
typedef struct {
guchar *data;
gint length;
gint format;
GdkAtom type;
} GdkSelProp;
static GHashTable *sel_prop_table = NULL;
static GdkSelProp *dropfiles_prop = NULL;
/* We store the owner of each selection in this table. Obviously, this only
* is valid intra-app, and in fact it is necessary for the intra-app DND to work.
*/
static GHashTable *sel_owner_table = NULL;
void
_gdk_win32_selection_init (void)
{
sel_prop_table = g_hash_table_new (NULL, NULL);
sel_owner_table = g_hash_table_new (NULL, NULL);
}
void
_gdk_selection_property_store (GdkWindow *owner,
GdkAtom type,
gint format,
guchar *data,
gint length)
{
GdkSelProp *prop;
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (owner));
if (prop != NULL)
{
g_free (prop->data);
g_hash_table_remove (sel_prop_table, GDK_WINDOW_HWND (owner));
}
prop = g_new (GdkSelProp, 1);
prop->data = data;
prop->length = length;
prop->format = format;
prop->type = type;
g_hash_table_insert (sel_prop_table, GDK_WINDOW_HWND (owner), prop);
}
void
_gdk_dropfiles_store (gchar *data)
{
if (data != NULL)
{
g_assert (dropfiles_prop == NULL);
dropfiles_prop = g_new (GdkSelProp, 1);
dropfiles_prop->data = data;
dropfiles_prop->length = strlen (data);
dropfiles_prop->format = 8;
dropfiles_prop->type = text_uri_list;
}
else
{
if (dropfiles_prop != NULL)
{
g_free (dropfiles_prop->data);
g_free (dropfiles_prop);
}
dropfiles_prop = NULL;
}
}
gboolean
gdk_selection_owner_set_for_display (GdkDisplay *display,
GdkWindow *owner,
GdkAtom selection,
guint32 time,
gboolean send_event)
{
HWND xwindow;
GdkEvent tmp_event;
gchar *sel_name;
g_return_val_if_fail (display == gdk_display_get_default (), FALSE);
GDK_NOTE (DND,
(sel_name = gdk_atom_name (selection),
g_print ("gdk_selection_owner_set: %#x %#x (%s)\n",
(owner ? (guint) GDK_WINDOW_HWND (owner) : 0),
(guint) selection, sel_name),
g_free (sel_name)));
if (selection != GDK_SELECTION_CLIPBOARD)
{
if (owner != NULL)
g_hash_table_insert (sel_owner_table, selection, GDK_WINDOW_HWND (owner));
else
g_hash_table_remove (sel_owner_table, selection);
return TRUE;
}
/* Rest of this function handles the CLIPBOARD selection */
if (owner != NULL)
{
if (GDK_WINDOW_DESTROYED (owner))
return FALSE;
xwindow = GDK_WINDOW_HWND (owner);
}
else
xwindow = NULL;
if (!OpenClipboard (xwindow))
{
WIN32_API_FAILED ("OpenClipboard");
return FALSE;
}
if (!EmptyClipboard ())
{
WIN32_API_FAILED ("EmptyClipboard");
CloseClipboard ();
return FALSE;
}
#if 0
/* No delayed rendering */
if (xwindow != NULL)
SetClipboardData (CF_TEXT, NULL);
#endif
if (!CloseClipboard ())
{
WIN32_API_FAILED ("CloseClipboard");
return FALSE;
}
if (owner != NULL)
{
/* Send ourselves a selection request message so that
* gdk_property_change will be called to store the clipboard
* data.
*/
GDK_NOTE (DND, g_print ("...sending GDK_SELECTION_REQUEST to ourselves\n"));
tmp_event.selection.type = GDK_SELECTION_REQUEST;
tmp_event.selection.window = owner;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = selection;
tmp_event.selection.target = GDK_TARGET_STRING;
tmp_event.selection.property = _gdk_selection_property;
tmp_event.selection.requestor = (guint32) xwindow;
tmp_event.selection.time = time;
gdk_event_put (&tmp_event);
}
return TRUE;
}
GdkWindow*
gdk_selection_owner_get_for_display (GdkDisplay *display,
GdkAtom selection)
{
GdkWindow *window;
gchar *sel_name;
g_return_val_if_fail (display == gdk_display_get_default (), NULL);
/* Return NULL for CLIPBOARD, because otherwise cut&paste
* inside the same application doesn't work. We must pretend to gtk
* that we don't have the selection, so that we always fetch it from
* the Windows clipboard. See also comments in
* gdk_selection_send_notify().
*/
if (selection == GDK_SELECTION_CLIPBOARD)
return NULL;
window = gdk_window_lookup ((GdkNativeWindow) g_hash_table_lookup (sel_owner_table, selection));
GDK_NOTE (DND,
(sel_name = gdk_atom_name (selection),
g_print ("gdk_selection_owner_get: %#x (%s) = %#x\n",
(guint) selection, sel_name,
(window ? (guint) GDK_WINDOW_HWND (window) : 0)),
g_free (sel_name)));
return window;
}
static void
generate_selection_notify (GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time)
{
GdkEvent tmp_event;
tmp_event.selection.type = GDK_SELECTION_NOTIFY;
tmp_event.selection.window = requestor;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = selection;
tmp_event.selection.target = target;
tmp_event.selection.property = property;
tmp_event.selection.requestor = 0;
tmp_event.selection.time = time;
gdk_event_put (&tmp_event);
}
void
gdk_selection_convert (GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
guint32 time)
{
HGLOBAL hdata;
GdkAtom property = _gdk_selection_property;
gchar *sel_name, *tgt_name;
g_return_if_fail (requestor != NULL);
if (GDK_WINDOW_DESTROYED (requestor))
return;
GDK_NOTE (DND,
(sel_name = gdk_atom_name (selection),
tgt_name = gdk_atom_name (target),
g_print ("gdk_selection_convert: %#x %#x (%s) %#x (%s)\n",
(guint) GDK_WINDOW_HWND (requestor),
(guint) selection, sel_name,
(guint) target, tgt_name),
g_free (sel_name),
g_free (tgt_name)));
if (selection == GDK_SELECTION_CLIPBOARD &&
target == gdk_atom_intern ("TARGETS", FALSE))
{
/* He wants to know what formats are on the clipboard. If there
* is some kind of text, tell him so.
*/
if (!OpenClipboard (GDK_WINDOW_HWND (requestor)))
{
WIN32_API_FAILED ("OpenClipboard");
return;
}
if (IsClipboardFormatAvailable (CF_UNICODETEXT) ||
IsClipboardFormatAvailable (cf_utf8_string) ||
IsClipboardFormatAvailable (CF_TEXT))
{
GdkAtom *data = g_new (GdkAtom, 1);
*data = GDK_TARGET_STRING;
_gdk_selection_property_store (requestor, GDK_SELECTION_TYPE_ATOM,
32, (guchar *) data, 1 * sizeof (GdkAtom));
}
else
property = GDK_NONE;
}
else if (selection == GDK_SELECTION_CLIPBOARD &&
(target == compound_text ||
target == GDK_TARGET_STRING))
{
/* Converting the CLIPBOARD selection means he wants the
* contents of the clipboard. Get the clipboard data,
* and store it for later.
*/
if (!OpenClipboard (GDK_WINDOW_HWND (requestor)))
{
WIN32_API_FAILED ("OpenClipboard");
return;
}
/* Try various formats. First the simplest, CF_UNICODETEXT. */
if ((hdata = GetClipboardData (CF_UNICODETEXT)) != NULL)
{
wchar_t *ptr, *wcs, *p, *q;
guchar *data;
gint length, wclen;
if ((ptr = GlobalLock (hdata)) != NULL)
{
length = GlobalSize (hdata);
GDK_NOTE (DND, g_print ("...CF_UNICODETEXT: %d bytes\n",
length));
/* Strip out \r */
wcs = g_new (wchar_t, (length + 1) * 2);
p = ptr;
q = wcs;
wclen = 0;
while (*p)
{
if (*p != '\r')
{
*q++ = *p;
wclen++;
}
p++;
}
data = _gdk_ucs2_to_utf8 (wcs, wclen);
g_free (wcs);
_gdk_selection_property_store (requestor, target, 8,
data, strlen (data) + 1);
GlobalUnlock (hdata);
}
}
else if ((hdata = GetClipboardData (cf_utf8_string)) != NULL)
{
/* UTF8_STRING is a format we store ourselves when necessary */
guchar *ptr;
gint length;
if ((ptr = GlobalLock (hdata)) != NULL)
{
length = GlobalSize (hdata);
GDK_NOTE (DND, g_print ("...UTF8_STRING: %d bytes: %.10s\n",
length, ptr));
_gdk_selection_property_store (requestor, target, 8,
g_strdup (ptr), strlen (ptr) + 1);
GlobalUnlock (hdata);
}
}
else if ((hdata = GetClipboardData (CF_TEXT)) != NULL)
{
/* We must always assume the data can contain non-ASCII
* in either the current code page, or if there is CF_LOCALE
* data, in that locale's default code page.
*/
HGLOBAL hlcid;
UINT cp = CP_ACP;
wchar_t *wcs, *wcs2, *p, *q;
guchar *ptr, *data;
gint length, wclen;
if ((ptr = GlobalLock (hdata)) != NULL)
{
length = GlobalSize (hdata);
GDK_NOTE (DND, g_print ("...CF_TEXT: %d bytes: %.10s\n",
length, ptr));
if ((hlcid = GetClipboardData (CF_LOCALE)) != NULL)
{
gchar buf[10];
LCID *lcidptr = GlobalLock (hlcid);
if (GetLocaleInfo (*lcidptr, LOCALE_IDEFAULTANSICODEPAGE,
buf, sizeof (buf)))
{
cp = atoi (buf);
GDK_NOTE (DND, g_print ("...CF_LOCALE: %#lx cp:%d\n",
*lcidptr, cp));
}
GlobalUnlock (hlcid);
}
wcs = g_new (wchar_t, length + 1);
wclen = MultiByteToWideChar (cp, 0, ptr, -1,
wcs, length + 1);
/* Strip out \r */
wcs2 = g_new (wchar_t, wclen);
p = wcs;
q = wcs2;
wclen = 0;
while (*p)
{
if (*p != '\r')
{
*q++ = *p;
wclen++;
}
p++;
}
g_free (wcs);
data = _gdk_ucs2_to_utf8 (wcs2, wclen);
g_free (wcs2);
_gdk_selection_property_store (requestor, target, 8,
data, strlen (data) + 1);
GlobalUnlock (hdata);
}
}
else
property = GDK_NONE;
CloseClipboard ();
}
else if (selection == gdk_win32_dropfiles)
{
/* This means he wants the names of the dropped files.
* gdk_dropfiles_filter already has stored the text/uri-list
* data temporarily in dropfiles_prop.
*/
if (dropfiles_prop != NULL)
{
_gdk_selection_property_store
(requestor, selection, dropfiles_prop->format,
dropfiles_prop->data, dropfiles_prop->length);
g_free (dropfiles_prop);
dropfiles_prop = NULL;
}
}
else
property = GDK_NONE;
/* Generate a selection notify message so that we actually fetch
* the data (if property == _gdk_selection_property) or indicating failure
* (if property == GDK_NONE).
*/
generate_selection_notify (requestor, selection, target, property, time);
}
gint
gdk_selection_property_get (GdkWindow *requestor,
guchar **data,
GdkAtom *ret_type,
gint *ret_format)
{
GdkSelProp *prop;
g_return_val_if_fail (requestor != NULL, 0);
g_return_val_if_fail (GDK_IS_WINDOW (requestor), 0);
if (GDK_WINDOW_DESTROYED (requestor))
return 0;
GDK_NOTE (DND, g_print ("gdk_selection_property_get: %#x\n",
(guint) GDK_WINDOW_HWND (requestor)));
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (requestor));
if (prop == NULL)
{
*data = NULL;
return 0;
}
*data = g_malloc (prop->length);
if (prop->length > 0)
memmove (*data, prop->data, prop->length);
if (ret_type)
*ret_type = prop->type;
if (ret_format)
*ret_format = prop->format;
return prop->length;
}
void
_gdk_selection_property_delete (GdkWindow *window)
{
GdkSelProp *prop;
GDK_NOTE (DND, g_print ("_gdk_selection_property_delete: %#x\n",
(guint) GDK_WINDOW_HWND (window)));
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (window));
if (prop != NULL)
{
g_free (prop->data);
g_hash_table_remove (sel_prop_table, GDK_WINDOW_HWND (window));
}
}
void
gdk_selection_send_notify_for_display (GdkDisplay *display,
guint32 requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time)
{
GdkEvent tmp_event;
gchar *sel_name, *tgt_name, *prop_name;
g_return_if_fail (display == gdk_display_get_default ());
GDK_NOTE (DND,
(sel_name = gdk_atom_name (selection),
tgt_name = gdk_atom_name (target),
prop_name = gdk_atom_name (property),
g_print ("gdk_selection_send_notify: %#x %#x (%s) %#x (%s) %#x (%s)\n",
requestor,
(guint) selection, sel_name,
(guint) target, tgt_name,
(guint) property, prop_name),
g_free (sel_name),
g_free (tgt_name),
g_free (prop_name)));
/* Send ourselves a selection clear message so that gtk thinks we don't
* have the selection, and will claim it anew when needed, and
* we thus get a chance to store data in the Windows clipboard.
* Otherwise, if a gtkeditable does a copy to CLIPBOARD several times
* only the first one actually gets copied to the Windows clipboard,
* as only the first one causes a call to gdk_property_change().
*
* Hmm, there is something fishy with this. Cut and paste inside the
* same app didn't work, the gtkeditable immediately forgot the
* clipboard contents in gtk_editable_selection_clear() as a result
* of this message. OTOH, when I changed gdk_selection_owner_get to
* return NULL for CLIPBOARD, it works. Sigh.
*/
tmp_event.selection.type = GDK_SELECTION_CLEAR;
tmp_event.selection.window = gdk_window_lookup (requestor);
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = selection;
tmp_event.selection.target = 0;
tmp_event.selection.property = 0;
tmp_event.selection.requestor = 0;
tmp_event.selection.time = time;
gdk_event_put (&tmp_event);
}
/* Simplistic implementations of text list and compound text functions */
gint
gdk_text_property_to_text_list_for_display (GdkAtom encoding,
gint format,
const guchar *text,
gint length,
gchar ***list)
{
gchar *enc_name;
GDK_NOTE (DND, (enc_name = gdk_atom_name (encoding),
g_print ("gdk_text_property_to_text_list: %s %d %.20s %d\n",
enc_name, format, text, length),
g_free (enc_name)));
if (!list)
return 0;
*list = g_new (gchar *, 1);
**list = g_strdup (text);
return 1;
}
void
gdk_free_text_list (gchar **list)
{
g_return_if_fail (list != NULL);
g_free (*list);
g_free (list);
}
gint
gdk_string_to_compound_text_for_display (const gchar *str,
GdkAtom *encoding,
gint *format,
guchar **ctext,
gint *length)
{
GDK_NOTE (DND, g_print ("gdk_string_to_compound_text: %.20s\n", str));
if (encoding)
*encoding = compound_text;
if (format)
*format = 8;
if (ctext)
*ctext = g_strdup (str);
if (length)
*length = strlen (str);
return 0;
}
void
gdk_free_compound_text (guchar *ctext)
{
g_free (ctext);
}
/* These are lifted from gdkselection-x11.c, just to get GTK+ to build.
* These functions probably don't make much sense at all in Windows.
*/
/* FIXME */
static gint
make_list (const gchar *text,
gint length,
gboolean latin1,
gchar ***list)
{
GSList *strings = NULL;
gint n_strings = 0;
gint i;
const gchar *p = text;
const gchar *q;
GSList *tmp_list;
GError *error = NULL;
while (p < text + length)
{
gchar *str;
q = p;
while (*q && q < text + length)
q++;
if (latin1)
{
str = g_convert (p, q - p,
"UTF-8", "ISO-8859-1",
NULL, NULL, &error);
if (!str)
{
g_warning ("Error converting selection from STRING: %s",
error->message);
g_error_free (error);
}
}
else
str = g_strndup (p, q - p);
if (str)
{
strings = g_slist_prepend (strings, str);
n_strings++;
}
p = q + 1;
}
if (list)
*list = g_new (gchar *, n_strings + 1);
(*list)[n_strings] = NULL;
i = n_strings;
tmp_list = strings;
while (tmp_list)
{
if (list)
(*list)[--i] = tmp_list->data;
else
g_free (tmp_list->data);
tmp_list = tmp_list->next;
}
g_slist_free (strings);
return n_strings;
}
/**
* gdk_text_property_to_utf8_list_for_display:
* @display: currently ignored
* @encoding: an atom representing the encoding of the text
* @format: the format of the property
* @text: the text to convert
* @length: the length of @text, in bytes
* @list: location to store the list of strings or %NULL. The
* list should be freed with g_strfreev().
*
* Converts a text property in the giving encoding to
* a list of UTF-8 strings.
*
* Return value: the number of strings in the resulting
* list.
**/
gint
gdk_text_property_to_utf8_list_for_display (GdkDisplay *display,
GdkAtom encoding,
gint format,
const guchar *text,
gint length,
gchar ***list)
{
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (length >= 0, 0);
g_return_val_if_fail (display == gdk_display_get_default (), 0);
if (encoding == GDK_TARGET_STRING)
{
return make_list ((gchar *)text, length, TRUE, list);
}
else if (encoding == utf8_string)
{
return make_list ((gchar *)text, length, FALSE, list);
}
else
{
gchar **local_list;
gint local_count;
gint i;
const gchar *charset = NULL;
gboolean need_conversion = g_get_charset (&charset);
gint count = 0;
GError *error = NULL;
/* Probably COMPOUND text, we fall back to Xlib routines
*/
local_count = gdk_text_property_to_text_list (encoding,
format,
text,
length,
&local_list);
if (list)
*list = g_new (gchar *, local_count + 1);
for (i=0; i<local_count; i++)
{
/* list contains stuff in our default encoding
*/
if (need_conversion)
{
gchar *utf = g_convert (local_list[i], -1,
"UTF-8", charset,
NULL, NULL, &error);
if (utf)
{
if (list)
(*list)[count++] = utf;
else
g_free (utf);
}
else
{
g_warning ("Error converting to UTF-8 from '%s': %s",
charset, error->message);
g_error_free (error);
error = NULL;
}
}
else
{
if (list)
(*list)[count++] = g_strdup (local_list[i]);
}
}
gdk_free_text_list (local_list);
(*list)[count] = NULL;
return count;
}
}
/* The specifications for COMPOUND_TEXT and STRING specify that C0 and
* C1 are not allowed except for \n and \t, however the X conversions
* routines for COMPOUND_TEXT only enforce this in one direction,
* causing cut-and-paste of \r and \r\n separated text to fail.
* This routine strips out all non-allowed C0 and C1 characters
* from the input string and also canonicalizes \r, \r\n, and \n\r to \n
*/
static gchar *
sanitize_utf8 (const gchar *src)
{
gint len = strlen (src);
GString *result = g_string_sized_new (len);
const gchar *p = src;
while (*p)
{
if (*p == '\r' || *p == '\n')
{
p++;
if (*p == '\r' || *p == '\n')
p++;
g_string_append_c (result, '\n');
}
else
{
gunichar ch = g_utf8_get_char (p);
char buf[7];
gint buflen;
if (!((ch < 0x20 && ch != '\t') || (ch >= 0x7f && ch < 0xa0)))
{
buflen = g_unichar_to_utf8 (ch, buf);
g_string_append_len (result, buf, buflen);
}
p = g_utf8_next_char (p);
}
}
return g_string_free (result, FALSE);
}
/**
* gdk_utf8_to_string_target:
* @str: a UTF-8 string
*
* Converts an UTF-8 string into the best possible representation
* as a STRING. The representation of characters not in STRING
* is not specified; it may be as pseudo-escape sequences
* \x{ABCD}, or it may be in some other form of approximation.
*
* Return value: the newly allocated string, or %NULL if the
* conversion failed. (It should not fail for
* any properly formed UTF-8 string.)
**/
gchar *
gdk_utf8_to_string_target (const gchar *str)
{
return sanitize_utf8 (str);
}
/**
* gdk_utf8_to_compound_text_for_display :
* @display: currently not used on win32
* @str: a UTF-8 string
* @encoding: location to store resulting encoding
* @format: location to store format of the result
* @ctext: location to store the data of the result
* @length: location to store the length of the data
* stored in @ctext
*
* Converts from UTF-8 to compound text.
*
* Return value: %TRUE if the conversion succeeded, otherwise
* %FALSE.
**/
gboolean
gdk_utf8_to_compound_text_for_display (GdkDisplay *display,
const gchar *str,
GdkAtom *encoding,
gint *format,
guchar **ctext,
gint *length)
{
gboolean need_conversion;
const gchar *charset;
gchar *locale_str, *tmp_str;
GError *error = NULL;
gboolean result;
g_return_val_if_fail (str != NULL, FALSE);
g_return_val_if_fail (display == gdk_display_get_default (), FALSE);
need_conversion = !g_get_charset (&charset);
tmp_str = sanitize_utf8 (str);
if (need_conversion)
{
locale_str = g_convert_with_fallback (tmp_str, -1,
charset, "UTF-8",
NULL, NULL, NULL, &error);
g_free (tmp_str);
if (!locale_str)
{
g_warning ("Error converting from UTF-8 to '%s': %s",
charset, error->message);
g_error_free (error);
if (encoding)
*encoding = GDK_NONE;
if (format)
*format = GPOINTER_TO_UINT (GDK_ATOM_TO_POINTER (GDK_NONE));
if (ctext)
*ctext = NULL;
if (length)
*length = 0;
return FALSE;
}
}
else
locale_str = tmp_str;
result = gdk_string_to_compound_text (locale_str,
encoding, format, ctext, length);
g_free (locale_str);
return result;
}
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