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gtk2/gtk/gtkimmodule.c
Aleksander Morgado 90de3c4fc0 win32: use the input locale to decide the default input method 
GTK+ tries to automatically assign the best input module based on the
'system locale'. In the specific case of the IME input method, it will
be the default for the whole GTK+ application if the system locale is
either Japanese (ja), Korean (ko) or Chinese (zh). Other defaults are
equally applicable, e.g. if system locale is Catalan (ca), the special
'Cedilla' input module is chosen.

System locale can be changed (e.g. Win7) through the following sequence
(reboot required):
  Control Panel
    Region and Language
      Administrative
        Language for non-Unicode Programs
          Change system locale...

The problem with this behaviour is that changing the 'default input
language' (e.g. from English to Japanese+IME) doesn't affect the GTK+
application. Therefore, I can have an English system locale (where GTK+
will choose Simple IM by default) but then have Japanese+IME as input
language.

Default input language can be changed (e.g. Win7) through the following
sequence (no reboot required):
  System locale can be changed (e.g. Win7) through:
    Control Panel
      Region and Language
        Keyboards and Languages
          Keyboards and other input languages
            Change keyboards...

Default input language can also be changed using the language bar directly.

So, instead of using the system-wide default locale to decide which input
method to use as default, better use the input language specified by the
user, which may be the same as the system-wide default locale, or different.
Following the previous example, with an English system locale and a
Japanese+IME input language, the default input method will now be IME
instead of Simple, which is closer to what's expected by the user.

This change only affects the application during startup; i.e. if the user
changes the input language while the application is running, we wouldn't be
changing the default input method to use. We could do this processing the
WM_INPUTLANGCHANGE messages, though.

https://bugzilla.gnome.org/show_bug.cgi?id=700428
2013-08-31 14:28:10 -04:00

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/* GTK - The GIMP Toolkit
* 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/>.Free
*/
/*
* 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib/gstdio.h>
#include <gmodule.h>
#include "gtkimmoduleprivate.h"
#include "gtkimcontextsimple.h"
#include "gtksettings.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#ifdef GDK_WINDOWING_X11
#include "x11/gdkx.h"
#endif
#ifdef GDK_WINDOWING_WAYLAND
#include "wayland/gdkwayland.h"
#endif
#ifdef GDK_WINDOWING_WIN32
#include "win32/gdkwin32.h"
#endif
#ifdef G_OS_WIN32
#include <windows.h>
#endif
#undef GDK_DEPRECATED
#undef GDK_DEPRECATED_FOR
#define GDK_DEPRECATED
#define GDK_DEPRECATED_FOR(f)
#include "deprecated/gtkrc.h"
#define SIMPLE_ID "gtk-im-context-simple"
/**
* GtkIMContextInfo:
* @context_id: The unique identification string of the input method.
* @context_name: The human-readable name of the input method.
* @domain: Translation domain to be used with dgettext()
* @domain_dirname: Name of locale directory for use with bindtextdomain()
* @default_locales: A colon-separated list of locales where this input method
* should be the default. The asterisk "*" sets the default for all locales.
*
* Bookkeeping information about a loadable input method.
*/
typedef struct _GtkIMModule GtkIMModule;
typedef struct _GtkIMModuleClass GtkIMModuleClass;
#define GTK_TYPE_IM_MODULE (gtk_im_module_get_type ())
#define GTK_IM_MODULE(im_module) (G_TYPE_CHECK_INSTANCE_CAST ((im_module), GTK_TYPE_IM_MODULE, GtkIMModule))
#define GTK_IS_IM_MODULE(im_module) (G_TYPE_CHECK_INSTANCE_TYPE ((im_module), GTK_TYPE_IM_MODULE))
struct _GtkIMModule
{
GTypeModule parent_instance;
gboolean builtin;
GModule *library;
void (*list) (const GtkIMContextInfo ***contexts,
guint *n_contexts);
void (*init) (GTypeModule *module);
void (*exit) (void);
GtkIMContext *(*create) (const gchar *context_id);
GtkIMContextInfo **contexts;
guint n_contexts;
gchar *path;
};
struct _GtkIMModuleClass
{
GTypeModuleClass parent_class;
};
static GType gtk_im_module_get_type (void);
static gint n_loaded_contexts = 0;
static GHashTable *contexts_hash = NULL;
static GSList *modules_list = NULL;
static GObjectClass *parent_class = NULL;
static gboolean
gtk_im_module_load (GTypeModule *module)
{
GtkIMModule *im_module = GTK_IM_MODULE (module);
if (!im_module->builtin)
{
im_module->library = g_module_open (im_module->path, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
if (!im_module->library)
{
g_warning ("%s", g_module_error());
return FALSE;
}
/* extract symbols from the lib */
if (!g_module_symbol (im_module->library, "im_module_init",
(gpointer *)&im_module->init) ||
!g_module_symbol (im_module->library, "im_module_exit",
(gpointer *)&im_module->exit) ||
!g_module_symbol (im_module->library, "im_module_list",
(gpointer *)&im_module->list) ||
!g_module_symbol (im_module->library, "im_module_create",
(gpointer *)&im_module->create))
{
g_warning ("%s", g_module_error());
g_module_close (im_module->library);
return FALSE;
}
}
/* call the module's init function to let it */
/* setup anything it needs to set up. */
im_module->init (module);
return TRUE;
}
static void
gtk_im_module_unload (GTypeModule *module)
{
GtkIMModule *im_module = GTK_IM_MODULE (module);
im_module->exit();
if (!im_module->builtin)
{
g_module_close (im_module->library);
im_module->library = NULL;
im_module->init = NULL;
im_module->exit = NULL;
im_module->list = NULL;
im_module->create = NULL;
}
}
/* This only will ever be called if an error occurs during
* initialization
*/
static void
gtk_im_module_finalize (GObject *object)
{
GtkIMModule *module = GTK_IM_MODULE (object);
g_free (module->path);
parent_class->finalize (object);
}
G_DEFINE_TYPE (GtkIMModule, gtk_im_module, G_TYPE_TYPE_MODULE)
static void
gtk_im_module_class_init (GtkIMModuleClass *class)
{
GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (class);
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (class));
module_class->load = gtk_im_module_load;
module_class->unload = gtk_im_module_unload;
gobject_class->finalize = gtk_im_module_finalize;
}
static void
gtk_im_module_init (GtkIMModule* object)
{
}
static void
free_info (GtkIMContextInfo *info)
{
g_free ((char *)info->context_id);
g_free ((char *)info->context_name);
g_free ((char *)info->domain);
g_free ((char *)info->domain_dirname);
g_free ((char *)info->default_locales);
g_free (info);
}
static void
add_module (GtkIMModule *module, GSList *infos)
{
GSList *tmp_list = infos;
gint i = 0;
gint n = g_slist_length (infos);
module->contexts = g_new (GtkIMContextInfo *, n);
while (tmp_list)
{
GtkIMContextInfo *info = tmp_list->data;
if (g_hash_table_lookup (contexts_hash, info->context_id))
{
free_info (info); /* Duplicate */
}
else
{
g_hash_table_insert (contexts_hash, (char *)info->context_id, module);
module->contexts[i++] = tmp_list->data;
n_loaded_contexts++;
}
tmp_list = tmp_list->next;
}
g_slist_free (infos);
module->n_contexts = i;
modules_list = g_slist_prepend (modules_list, module);
}
#ifdef G_OS_WIN32
static void
correct_libdir_prefix (gchar **path)
{
/* GTK_LIBDIR is the build-time libdir */
if (strncmp (*path, GTK_LIBDIR, strlen (GTK_LIBDIR)) == 0)
{
/* This is an entry put there by make install on the
* packager's system. On Windows a prebuilt GTK+
* package can be installed in a random
* location. The gtk.immodules file distributed in
* such a package contains paths from the package
* builder's machine. Replace the path with the real
* one on this machine.
*/
gchar *tem = *path;
*path = g_strconcat (_gtk_get_libdir (), tem + strlen (GTK_LIBDIR), NULL);
g_free (tem);
}
}
static void
correct_localedir_prefix (gchar **path)
{
/* See above */
if (strncmp (*path, GTK_LOCALEDIR, strlen (GTK_LOCALEDIR)) == 0)
{
gchar *tem = *path;
*path = g_strconcat (_gtk_get_localedir (), tem + strlen (GTK_LOCALEDIR), NULL);
g_free (tem);
}
}
#endif
G_GNUC_UNUSED static GtkIMModule *
add_builtin_module (const gchar *module_name,
const GtkIMContextInfo **contexts,
int n_contexts)
{
GtkIMModule *module = g_object_new (GTK_TYPE_IM_MODULE, NULL);
GSList *infos = NULL;
int i;
for (i = 0; i < n_contexts; i++)
{
GtkIMContextInfo *info = g_new (GtkIMContextInfo, 1);
info->context_id = g_strdup (contexts[i]->context_id);
info->context_name = g_strdup (contexts[i]->context_name);
info->domain = g_strdup (contexts[i]->domain);
info->domain_dirname = g_strdup (contexts[i]->domain_dirname);
#ifdef G_OS_WIN32
correct_localedir_prefix ((char **) &info->domain_dirname);
#endif
info->default_locales = g_strdup (contexts[i]->default_locales);
infos = g_slist_prepend (infos, info);
}
module->builtin = TRUE;
g_type_module_set_name (G_TYPE_MODULE (module), module_name);
add_module (module, infos);
return module;
}
static void
gtk_im_module_initialize (void)
{
GString *line_buf = g_string_new (NULL);
GString *tmp_buf = g_string_new (NULL);
gchar *filename = gtk_rc_get_im_module_file();
FILE *file;
gboolean have_error = FALSE;
GtkIMModule *module = NULL;
GSList *infos = NULL;
contexts_hash = g_hash_table_new (g_str_hash, g_str_equal);
#define do_builtin(m) \
{ \
const GtkIMContextInfo **contexts; \
int n_contexts; \
extern void _gtk_immodule_ ## m ## _list (const GtkIMContextInfo ***contexts, \
guint *n_contexts); \
extern void _gtk_immodule_ ## m ## _init (GTypeModule *module); \
extern void _gtk_immodule_ ## m ## _exit (void); \
extern GtkIMContext *_gtk_immodule_ ## m ## _create (const gchar *context_id); \
\
_gtk_immodule_ ## m ## _list (&contexts, &n_contexts); \
module = add_builtin_module (#m, contexts, n_contexts); \
module->init = _gtk_immodule_ ## m ## _init; \
module->exit = _gtk_immodule_ ## m ## _exit; \
module->create = _gtk_immodule_ ## m ## _create; \
module = NULL; \
}
#ifdef INCLUDE_IM_am_et
do_builtin (am_et);
#endif
#ifdef INCLUDE_IM_cedilla
do_builtin (cedilla);
#endif
#ifdef INCLUDE_IM_cyrillic_translit
do_builtin (cyrillic_translit);
#endif
#ifdef INCLUDE_IM_ime
do_builtin (ime);
#endif
#ifdef INCLUDE_IM_inuktitut
do_builtin (inuktitut);
#endif
#ifdef INCLUDE_IM_ipa
do_builtin (ipa);
#endif
#ifdef INCLUDE_IM_multipress
do_builtin (multipress);
#endif
#ifdef INCLUDE_IM_thai
do_builtin (thai);
#endif
#ifdef INCLUDE_IM_ti_er
do_builtin (ti_er);
#endif
#ifdef INCLUDE_IM_ti_et
do_builtin (ti_et);
#endif
#ifdef INCLUDE_IM_viqr
do_builtin (viqr);
#endif
#ifdef INCLUDE_IM_xim
do_builtin (xim);
#endif
#undef do_builtin
file = g_fopen (filename, "r");
if (!file)
{
/* In case someone wants only the default input method,
* we allow no file at all.
*/
g_string_free (line_buf, TRUE);
g_string_free (tmp_buf, TRUE);
g_free (filename);
return;
}
while (!have_error && pango_read_line (file, line_buf))
{
const char *p;
p = line_buf->str;
if (!pango_skip_space (&p))
{
/* Blank line marking the end of a module
*/
if (module && *p != '#')
{
add_module (module, infos);
module = NULL;
infos = NULL;
}
continue;
}
if (!module)
{
/* Read a module location
*/
module = g_object_new (GTK_TYPE_IM_MODULE, NULL);
if (!pango_scan_string (&p, tmp_buf) ||
pango_skip_space (&p))
{
g_warning ("Error parsing context info in '%s'\n %s",
filename, line_buf->str);
have_error = TRUE;
}
module->path = g_strdup (tmp_buf->str);
#ifdef G_OS_WIN32
correct_libdir_prefix (&module->path);
#endif
g_type_module_set_name (G_TYPE_MODULE (module), module->path);
}
else
{
GtkIMContextInfo *info = g_new0 (GtkIMContextInfo, 1);
/* Read information about a context type
*/
if (!pango_scan_string (&p, tmp_buf))
goto context_error;
info->context_id = g_strdup (tmp_buf->str);
if (!pango_scan_string (&p, tmp_buf))
goto context_error;
info->context_name = g_strdup (tmp_buf->str);
if (!pango_scan_string (&p, tmp_buf))
goto context_error;
info->domain = g_strdup (tmp_buf->str);
if (!pango_scan_string (&p, tmp_buf))
goto context_error;
info->domain_dirname = g_strdup (tmp_buf->str);
#ifdef G_OS_WIN32
correct_localedir_prefix ((char **) &info->domain_dirname);
#endif
if (!pango_scan_string (&p, tmp_buf))
goto context_error;
info->default_locales = g_strdup (tmp_buf->str);
if (pango_skip_space (&p))
goto context_error;
infos = g_slist_prepend (infos, info);
continue;
context_error:
g_warning ("Error parsing context info in '%s'\n %s",
filename, line_buf->str);
have_error = TRUE;
}
}
if (have_error)
{
GSList *tmp_list = infos;
while (tmp_list)
{
free_info (tmp_list->data);
tmp_list = tmp_list->next;
}
g_slist_free (infos);
g_object_unref (module);
}
else if (module)
add_module (module, infos);
fclose (file);
g_string_free (line_buf, TRUE);
g_string_free (tmp_buf, TRUE);
g_free (filename);
}
static gint
compare_gtkimcontextinfo_name(const GtkIMContextInfo **a,
const GtkIMContextInfo **b)
{
return g_utf8_collate ((*a)->context_name, (*b)->context_name);
}
/**
* _gtk_im_module_list:
* @contexts: location to store an array of pointers to #GtkIMContextInfo
* this array should be freed with g_free() when you are finished.
* The structures it points are statically allocated and should
* not be modified or freed.
* @n_contexts: the length of the array stored in @contexts
*
* List all available types of input method context
*/
void
_gtk_im_module_list (const GtkIMContextInfo ***contexts,
guint *n_contexts)
{
int n = 0;
static
#ifndef G_OS_WIN32
const
#endif
GtkIMContextInfo simple_context_info = {
SIMPLE_ID,
N_("Simple"),
GETTEXT_PACKAGE,
#ifdef GTK_LOCALEDIR
GTK_LOCALEDIR,
#else
"",
#endif
""
};
#ifdef G_OS_WIN32
static gboolean beenhere = FALSE;
#endif
if (!contexts_hash)
gtk_im_module_initialize ();
#ifdef G_OS_WIN32
if (!beenhere)
{
beenhere = TRUE;
/* correct_localedir_prefix() requires its parameter to be a
* malloced string
*/
simple_context_info.domain_dirname = g_strdup (simple_context_info.domain_dirname);
correct_localedir_prefix ((char **) &simple_context_info.domain_dirname);
}
#endif
if (n_contexts)
*n_contexts = (n_loaded_contexts + 1);
if (contexts)
{
GSList *tmp_list;
int i;
*contexts = g_new (const GtkIMContextInfo *, n_loaded_contexts + 1);
(*contexts)[n++] = &simple_context_info;
tmp_list = modules_list;
while (tmp_list)
{
GtkIMModule *module = tmp_list->data;
for (i=0; i<module->n_contexts; i++)
(*contexts)[n++] = module->contexts[i];
tmp_list = tmp_list->next;
}
/* fisrt element (Default) should always be at top */
qsort ((*contexts)+1, n-1, sizeof (GtkIMContextInfo *), (GCompareFunc)compare_gtkimcontextinfo_name);
}
}
/**
* _gtk_im_module_create:
* @context_id: the context ID for the context type to create
*
* Create an IM context of a type specified by the string
* ID @context_id.
*
* Return value: a newly created input context of or @context_id, or
* if that could not be created, a newly created GtkIMContextSimple.
*/
GtkIMContext *
_gtk_im_module_create (const gchar *context_id)
{
GtkIMModule *im_module;
GtkIMContext *context = NULL;
if (!contexts_hash)
gtk_im_module_initialize ();
if (strcmp (context_id, SIMPLE_ID) != 0)
{
im_module = g_hash_table_lookup (contexts_hash, context_id);
if (!im_module)
{
g_warning ("Attempt to load unknown IM context type '%s'", context_id);
}
else
{
if (g_type_module_use (G_TYPE_MODULE (im_module)))
{
context = im_module->create (context_id);
g_type_module_unuse (G_TYPE_MODULE (im_module));
}
if (!context)
g_warning ("Loading IM context type '%s' failed", context_id);
}
}
if (!context)
return gtk_im_context_simple_new ();
else
return context;
}
/* Match @locale against @against.
*
* 'en_US' against 'en_US' => 4
* 'en_US' against 'en' => 3
* 'en', 'en_UK' against 'en_US' => 2
* all locales, against '*' => 1
*/
static gint
match_locale (const gchar *locale,
const gchar *against,
gint against_len)
{
if (strcmp (against, "*") == 0)
return 1;
if (g_ascii_strcasecmp (locale, against) == 0)
return 4;
if (g_ascii_strncasecmp (locale, against, 2) == 0)
return (against_len == 2) ? 3 : 2;
return 0;
}
static gboolean
match_backend (GtkIMContextInfo *context)
{
#ifdef GDK_WINDOWING_WAYLAND
if (g_strcmp0 (context->context_id, "wayland") == 0)
return GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ());
#endif
#ifdef GDK_WINDOWING_X11
if (g_strcmp0 (context->context_id, "xim") == 0)
return GDK_IS_X11_DISPLAY (gdk_display_get_default ());
#endif
#ifdef GDK_WINDOWING_WIN32
if (g_strcmp0 (context->context_id, "ime") == 0)
return GDK_IS_WIN32_DISPLAY (gdk_display_get_default ());
#endif
return TRUE;
}
static const gchar *
lookup_immodule (gchar **immodules_list)
{
while (immodules_list && *immodules_list)
{
if (g_strcmp0 (*immodules_list, SIMPLE_ID) == 0)
return SIMPLE_ID;
else
{
gboolean found;
gchar *context_id;
found = g_hash_table_lookup_extended (contexts_hash, *immodules_list,
(gpointer *) &context_id, NULL);
if (found)
return context_id;
}
immodules_list++;
}
return NULL;
}
#ifdef G_OS_WIN32
/* max size for LOCALE_SISO639LANGNAME and LOCALE_SISO3166CTRYNAME is 9 */
#define MAX_NAME_SIZE 9
static gchar *
get_current_input_language (void)
{
LCID lcid;
LANGID langid;
HKL kblayout;
int name_size;
wchar_t name[MAX_NAME_SIZE];
gchar *language;
gchar *country;
gchar *full;
/* Current thread's keyboard layout */
kblayout = GetKeyboardLayout(0);
/* lowest word in the HKL is the LANGID */
langid = ((guint32)kblayout) & 0xFFFF;
/* LCID is the LANGID without order */
lcid = langid;
/* Get Language ID */
name_size = GetLocaleInfoW (lcid, LOCALE_SISO639LANGNAME, NULL, 0);
if (name_size <= 1)
return NULL;
g_assert (name_size <= MAX_NAME_SIZE);
GetLocaleInfoW (lcid, LOCALE_SISO639LANGNAME, name, name_size);
language = g_utf16_to_utf8 (name, name_size, NULL, NULL, NULL);
if (!language)
return NULL;
if (SUBLANGID (langid) == SUBLANG_NEUTRAL)
return language;
/* Get Country ID */
name_size = GetLocaleInfoW (lcid, LOCALE_SISO3166CTRYNAME, NULL, 0);
if (name_size <= 1)
return language;
g_assert (name_size <= MAX_NAME_SIZE);
GetLocaleInfoW (lcid, LOCALE_SISO3166CTRYNAME, name, name_size);
country = g_utf16_to_utf8 (name, name_size, NULL, NULL, NULL);
if (!country)
return language;
full = g_strdup_printf ("%s_%s", language, country);
g_free (language);
g_free (country);
return full;
}
#endif
/**
* _gtk_im_module_get_default_context_id:
* @client_window: a window
*
* Return the context_id of the best IM context type
* for the given window.
*
* Return value: the context ID (will never be %NULL)
*/
const gchar *
_gtk_im_module_get_default_context_id (GdkWindow *client_window)
{
GSList *tmp_list;
const gchar *context_id = NULL;
gint best_goodness = 0;
gint i;
gchar *tmp_locale, *tmp, **immodules;
const gchar *envvar;
GdkScreen *screen;
GtkSettings *settings;
if (!contexts_hash)
gtk_im_module_initialize ();
envvar = g_getenv ("GTK_IM_MODULE");
if (envvar)
{
immodules = g_strsplit (envvar, ":", 0);
context_id = lookup_immodule (immodules);
g_strfreev (immodules);
if (context_id)
return context_id;
}
/* Check if the certain immodule is set in XSETTINGS.
*/
screen = gdk_screen_get_default ();
settings = gtk_settings_get_for_screen (screen);
g_object_get (G_OBJECT (settings), "gtk-im-module", &tmp, NULL);
if (tmp)
{
immodules = g_strsplit (tmp, ":", 0);
context_id = lookup_immodule (immodules);
g_strfreev (immodules);
g_free (tmp);
if (context_id)
return context_id;
}
#ifdef G_OS_WIN32
/* Read current input locale from the current keyboard info */
tmp_locale = get_current_input_language ();
if (!tmp_locale)
/* Default to system locale when input language is unknown */
tmp_locale = _gtk_get_lc_ctype ();
#else
tmp_locale = _gtk_get_lc_ctype ();
#endif
/* Strip the locale code down to the essentials
*/
tmp = strchr (tmp_locale, '.');
if (tmp)
*tmp = '\0';
tmp = strchr (tmp_locale, '@');
if (tmp)
*tmp = '\0';
tmp_list = modules_list;
while (tmp_list)
{
GtkIMModule *module = tmp_list->data;
for (i = 0; i < module->n_contexts; i++)
{
const gchar *p;
if (!match_backend (module->contexts[i]))
continue;
p = module->contexts[i]->default_locales;
while (p)
{
const gchar *q = strchr (p, ':');
gint goodness = match_locale (tmp_locale, p, q ? q - p : strlen (p));
if (goodness > best_goodness)
{
context_id = module->contexts[i]->context_id;
best_goodness = goodness;
}
p = q ? q + 1 : NULL;
}
}
tmp_list = tmp_list->next;
}
g_free (tmp_locale);
return context_id ? context_id : SIMPLE_ID;
}
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