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gtk2/gtk/gtkimmodule.c

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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, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib/gstdio.h>
#include <gmodule.h>
#include "gtkimmodule.h"
#include "gtkimcontextsimple.h"
#include "gtksettings.h"
#include "gtkmain.h"
#include "gtkrc.h"
#include "gtkintl.h"
/* Do *not* include "gtkprivate.h" in this file. If you do, the
* correct_libdir_prefix() and correct_localedir_prefix() functions
* below will have to move somewhere else.
*/
#ifdef __GTK_PRIVATE_H__
#error gtkprivate.h should not be included in this file
#endif
#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 here is supposed to still have the definition from
* Makefile.am, i.e. the build-time value. Do *not* include gtkprivate.h
* in this file.
*/
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.
*/
extern const gchar *_gtk_get_libdir ();
gchar *tem = *path;
*path = g_strconcat (_gtk_get_libdir (), tem + strlen (GTK_LIBDIR), NULL);
g_free (tem);
}
}
static void
correct_localedir_prefix (gchar **path)
{
/* As above, but for GTK_LOCALEDIR. Use separate function in case
* GTK_LOCALEDIR isn't a subfolder of GTK_LIBDIR.
*/
if (strncmp (*path, GTK_LOCALEDIR, strlen (GTK_LOCALEDIR)) == 0)
{
extern const gchar *_gtk_get_localedir ();
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;
}
/**
* _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;
const gchar *envvar;
GdkScreen *screen;
GtkSettings *settings;
if (!contexts_hash)
gtk_im_module_initialize ();
envvar = g_getenv ("GTK_IM_MODULE");
if (envvar &&
(strcmp (envvar, SIMPLE_ID) == 0 ||
g_hash_table_lookup (contexts_hash, envvar)))
return envvar;
/* Check if the certain immodule is set in XSETTINGS.
*/
if (GDK_IS_DRAWABLE (client_window))
{
screen = gdk_drawable_get_screen (GDK_DRAWABLE (client_window));
settings = gtk_settings_get_for_screen (screen);
g_object_get (G_OBJECT (settings), "gtk-im-module", &tmp, NULL);
if (tmp)
{
if (strcmp (tmp, SIMPLE_ID) == 0)
context_id = SIMPLE_ID;
else
{
GtkIMModule *module;
module = g_hash_table_lookup (contexts_hash, tmp);
if (module)
context_id = module->contexts[0]->context_id;
}
g_free (tmp);
if (context_id)
return context_id;
}
}
/* Strip the locale code down to the essentials
*/
tmp_locale = _gtk_get_lc_ctype ();
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 = 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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