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gtk/gtk/gtkimmulticontext.c
Owen Taylor 9a25f879ab Reset the existing slave before removing it to give it a chance to commit 
Wed Dec 12 17:22:45 2001  Owen Taylor  <otaylor@redhat.com>
	* gtk/gtkimmulticontext.c (gtk_im_multicontext_set_slave):
	Reset the existing slave before removing it to give
	it a chance to commit and emit "preedit_changed"
	in case there was still a preedit string.
2001-12-12 22:35:31 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2000 Red Hat, Inc.
*
* 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.
*/
#include <string.h>
#include <locale.h>
#include "gtksignal.h"
#include "gtkimmulticontext.h"
#include "gtkimmodule.h"
#include "gtkradiomenuitem.h"
static void gtk_im_multicontext_class_init (GtkIMMulticontextClass *class);
static void gtk_im_multicontext_init (GtkIMMulticontext *im_multicontext);
static void gtk_im_multicontext_finalize (GObject *object);
static void gtk_im_multicontext_set_slave (GtkIMMulticontext *multicontext,
GtkIMContext *slave,
gboolean finalizing);
static void gtk_im_multicontext_set_client_window (GtkIMContext *context,
GdkWindow *window);
static void gtk_im_multicontext_get_preedit_string (GtkIMContext *context,
gchar **str,
PangoAttrList **attrs,
gint *cursor_pos);
static gboolean gtk_im_multicontext_filter_keypress (GtkIMContext *context,
GdkEventKey *event);
static void gtk_im_multicontext_focus_in (GtkIMContext *context);
static void gtk_im_multicontext_focus_out (GtkIMContext *context);
static void gtk_im_multicontext_reset (GtkIMContext *context);
static void gtk_im_multicontext_set_cursor_location (GtkIMContext *context,
GdkRectangle *area);
static void gtk_im_multicontext_set_use_preedit (GtkIMContext *context,
gboolean use_preedit);
static gboolean gtk_im_multicontext_get_surrounding (GtkIMContext *context,
gchar **text,
gint *cursor_index);
static void gtk_im_multicontext_set_surrounding (GtkIMContext *context,
const char *text,
gint len,
gint cursor_index);
static void gtk_im_multicontext_preedit_start_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext);
static void gtk_im_multicontext_preedit_end_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext);
static void gtk_im_multicontext_preedit_changed_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext);
static void gtk_im_multicontext_commit_cb (GtkIMContext *slave,
const gchar *str,
GtkIMMulticontext *multicontext);
static gboolean gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext);
static gboolean gtk_im_multicontext_delete_surrounding_cb (GtkIMContext *slave,
gint offset,
gint n_chars,
GtkIMMulticontext *multicontext);
static GtkIMContextClass *parent_class;
static const gchar *global_context_id = NULL;
GtkType
gtk_im_multicontext_get_type (void)
{
static GtkType im_multicontext_type = 0;
if (!im_multicontext_type)
{
static const GTypeInfo im_multicontext_info =
{
sizeof (GtkIMMulticontextClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gtk_im_multicontext_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkIMMulticontext),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_im_multicontext_init,
};
im_multicontext_type = g_type_register_static (GTK_TYPE_IM_CONTEXT,
"GtkIMMulticontext",
&im_multicontext_info, 0);
}
return im_multicontext_type;
}
static void
gtk_im_multicontext_class_init (GtkIMMulticontextClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
parent_class = g_type_class_peek_parent (class);
im_context_class->set_client_window = gtk_im_multicontext_set_client_window;
im_context_class->get_preedit_string = gtk_im_multicontext_get_preedit_string;
im_context_class->filter_keypress = gtk_im_multicontext_filter_keypress;
im_context_class->focus_in = gtk_im_multicontext_focus_in;
im_context_class->focus_out = gtk_im_multicontext_focus_out;
im_context_class->reset = gtk_im_multicontext_reset;
im_context_class->set_cursor_location = gtk_im_multicontext_set_cursor_location;
im_context_class->set_use_preedit = gtk_im_multicontext_set_use_preedit;
im_context_class->set_surrounding = gtk_im_multicontext_set_surrounding;
im_context_class->get_surrounding = gtk_im_multicontext_get_surrounding;
gobject_class->finalize = gtk_im_multicontext_finalize;
}
static void
gtk_im_multicontext_init (GtkIMMulticontext *multicontext)
{
multicontext->slave = NULL;
}
/**
* gtk_im_multicontext_new:
*
* Creates a new #GtkIMMulticontext.
*
* Returns: a new #GtkIMMulticontext.
**/
GtkIMContext *
gtk_im_multicontext_new (void)
{
return GTK_IM_CONTEXT (g_object_new (GTK_TYPE_IM_MULTICONTEXT, NULL));
}
static void
gtk_im_multicontext_finalize (GObject *object)
{
gtk_im_multicontext_set_slave (GTK_IM_MULTICONTEXT (object), NULL, TRUE);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gtk_im_multicontext_set_slave (GtkIMMulticontext *multicontext,
GtkIMContext *slave,
gboolean finalizing)
{
if (multicontext->slave)
{
if (!finalizing)
gtk_im_context_reset (multicontext->slave);
g_signal_handlers_disconnect_by_func (multicontext->slave,
gtk_im_multicontext_preedit_start_cb,
multicontext);
g_signal_handlers_disconnect_by_func (multicontext->slave,
gtk_im_multicontext_preedit_end_cb,
multicontext);
g_signal_handlers_disconnect_by_func (multicontext->slave,
gtk_im_multicontext_preedit_changed_cb,
multicontext);
g_signal_handlers_disconnect_by_func (multicontext->slave,
gtk_im_multicontext_commit_cb,
multicontext);
g_object_unref (multicontext->slave);
multicontext->slave = NULL;
if (!finalizing)
g_signal_emit_by_name (multicontext, "preedit_changed");
}
multicontext->slave = slave;
if (multicontext->slave)
{
g_object_ref (multicontext->slave);
g_signal_connect (multicontext->slave, "preedit_start",
G_CALLBACK (gtk_im_multicontext_preedit_start_cb),
multicontext);
g_signal_connect (multicontext->slave, "preedit_end",
G_CALLBACK (gtk_im_multicontext_preedit_end_cb),
multicontext);
g_signal_connect (multicontext->slave, "preedit_changed",
G_CALLBACK (gtk_im_multicontext_preedit_changed_cb),
multicontext);
g_signal_connect (multicontext->slave, "commit",
G_CALLBACK (gtk_im_multicontext_commit_cb),
multicontext);
g_signal_connect (multicontext->slave, "retrieve_surrounding",
G_CALLBACK (gtk_im_multicontext_retrieve_surrounding_cb),
multicontext);
g_signal_connect (multicontext->slave, "delete_surrounding",
G_CALLBACK (gtk_im_multicontext_delete_surrounding_cb),
multicontext);
if (multicontext->client_window)
gtk_im_context_set_client_window (slave, multicontext->client_window);
}
}
static GtkIMContext *
gtk_im_multicontext_get_slave (GtkIMMulticontext *multicontext)
{
if (!multicontext->slave)
{
if (!global_context_id)
{
const char *locale;
#ifdef HAVE_LC_MESSAGES
locale = setlocale (LC_MESSAGES, NULL);
#else
locale = setlocale (LC_CTYPE, NULL);
#endif
global_context_id = _gtk_im_module_get_default_context_id (locale);
}
gtk_im_multicontext_set_slave (multicontext, _gtk_im_module_create (global_context_id), FALSE);
multicontext->context_id = global_context_id;
}
return multicontext->slave;
}
static void
gtk_im_multicontext_set_client_window (GtkIMContext *context,
GdkWindow *window)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
multicontext->client_window = window;
if (slave)
gtk_im_context_set_client_window (slave, window);
}
static void
gtk_im_multicontext_get_preedit_string (GtkIMContext *context,
gchar **str,
PangoAttrList **attrs,
gint *cursor_pos)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_get_preedit_string (slave, str, attrs, cursor_pos);
else
{
if (str)
*str = g_strdup ("");
if (attrs)
*attrs = pango_attr_list_new ();
}
}
static gboolean
gtk_im_multicontext_filter_keypress (GtkIMContext *context,
GdkEventKey *event)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
return gtk_im_context_filter_keypress (slave, event);
else
return FALSE;
}
static void
gtk_im_multicontext_focus_in (GtkIMContext *context)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave;
/* If the global context type is different from the context we were
* using before, get rid of the old slave and create a new one
* for the new global context type.
*/
if (!multicontext->context_id ||
strcmp (global_context_id, multicontext->context_id) != 0)
gtk_im_multicontext_set_slave (multicontext, NULL, FALSE);
slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_focus_in (slave);
}
static void
gtk_im_multicontext_focus_out (GtkIMContext *context)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_focus_out (slave);
}
static void
gtk_im_multicontext_reset (GtkIMContext *context)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_reset (slave);
}
static void
gtk_im_multicontext_set_cursor_location (GtkIMContext *context,
GdkRectangle *area)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_set_cursor_location (slave, area);
}
static void
gtk_im_multicontext_set_use_preedit (GtkIMContext *context,
gboolean use_preedit)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_set_use_preedit (slave, use_preedit);
}
static gboolean
gtk_im_multicontext_get_surrounding (GtkIMContext *context,
gchar **text,
gint *cursor_index)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
return gtk_im_context_get_surrounding (context, text, cursor_index);
else
{
if (text)
*text = NULL;
if (cursor_index)
*cursor_index = 0;
return FALSE;
}
}
static void
gtk_im_multicontext_set_surrounding (GtkIMContext *context,
const char *text,
gint len,
gint cursor_index)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
if (slave)
gtk_im_context_set_surrounding (slave, text, len, cursor_index);
}
static void
gtk_im_multicontext_preedit_start_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext)
{
g_signal_emit_by_name (multicontext, "preedit_start");
}
static void
gtk_im_multicontext_preedit_end_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext)
{
g_signal_emit_by_name (multicontext, "preedit_end");
}
static void
gtk_im_multicontext_preedit_changed_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext)
{
g_signal_emit_by_name (multicontext, "preedit_changed");
}
static void
gtk_im_multicontext_commit_cb (GtkIMContext *slave,
const gchar *str,
GtkIMMulticontext *multicontext)
{
g_signal_emit_by_name (multicontext, "commit", str);;
}
static gboolean
gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext *slave,
GtkIMMulticontext *multicontext)
{
gboolean result;
g_signal_emit_by_name (multicontext, "retrieve_surrounding", &result);
return result;
}
static gboolean
gtk_im_multicontext_delete_surrounding_cb (GtkIMContext *slave,
gint offset,
gint n_chars,
GtkIMMulticontext *multicontext)
{
gboolean result;
g_signal_emit_by_name (multicontext, "delete_surrounding",
offset, n_chars, &result);
return result;
}
static void
activate_cb (GtkWidget *menuitem,
GtkIMMulticontext *context)
{
if (GTK_CHECK_MENU_ITEM (menuitem)->active)
{
const gchar *id = gtk_object_get_data (GTK_OBJECT (menuitem), "gtk-context-id");
gtk_im_context_reset (GTK_IM_CONTEXT (context));
global_context_id = id;
gtk_im_multicontext_set_slave (context, NULL, FALSE);
}
}
/**
* gtk_im_multicontext_append_menuitems:
* @context: a #GtkIMMultiContext
* @menushell: a #GtkMenuShell
*
* Add menuitems for various available input methods to a menu;
* the menuitems, when selected, will switch the input method
* for the context and the global default input method.
**/
void
gtk_im_multicontext_append_menuitems (GtkIMMulticontext *context,
GtkMenuShell *menushell)
{
const GtkIMContextInfo **contexts;
gint n_contexts, i;
GSList *group = NULL;
_gtk_im_module_list (&contexts, &n_contexts);
for (i=0; i < n_contexts; i++)
{
GtkWidget *menuitem;
menuitem = gtk_radio_menu_item_new_with_label (group,
contexts[i]->context_name);
if ((global_context_id == NULL && group == NULL) ||
(global_context_id &&
strcmp (contexts[i]->context_id, global_context_id) == 0))
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menuitem),
TRUE);
group = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem));
gtk_object_set_data (GTK_OBJECT (menuitem), "gtk-context-id",
(char *)contexts[i]->context_id);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
G_CALLBACK (activate_cb), context);
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
}
}
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