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gtk2/gtk/gtkimmulticontext.c
Michael Natterer 2688ccdbc4 gtk: clean up the private horror 
- add gtkmodulesprivate.h and move stuff there from gtkprivate.h
- add gtkprivate.c and move stuff there from gtkmain.c
- add gtkwin32.c and move stuff there from gtkmain.c
- don't redefine GTK_DATADIR and friends in gtkprivate.h
- have _gtk_get_datadir() and friends on all platforms
- remove the horrid hacks where gtkprivate.h can't be included,
  or must be included later due to redefinition of the compile-time
  directories
2011-10-22 23:53:55 +02:00

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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 "config.h"
#include <string.h>
#include <locale.h>
#include "gtkimmulticontext.h"
#include "gtkimmodule.h"
#include "gtkmain.h"
#include "gtkradiomenuitem.h"
#include "gtkintl.h"
#include "gtkprivate.h"
/**
* SECTION:gtkimmulticontext
* @Short_description: An input method context supporting multiple, loadable input methods
* @Title: GtkIMMulticontext
*/
#define NONE_ID "gtk-im-context-none"
struct _GtkIMMulticontextPrivate
{
GtkIMContext *slave;
GdkWindow *client_window;
GdkRectangle cursor_location;
gchar *context_id;
gchar *context_id_aux;
guint use_preedit : 1;
guint have_cursor_location : 1;
guint focus_in : 1;
};
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 const gchar *global_context_id = NULL;
G_DEFINE_TYPE (GtkIMMulticontext, gtk_im_multicontext, GTK_TYPE_IM_CONTEXT)
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);
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;
g_type_class_add_private (gobject_class, sizeof (GtkIMMulticontextPrivate));
}
static void
gtk_im_multicontext_init (GtkIMMulticontext *multicontext)
{
GtkIMMulticontextPrivate *priv;
multicontext->priv = G_TYPE_INSTANCE_GET_PRIVATE (multicontext, GTK_TYPE_IM_MULTICONTEXT, GtkIMMulticontextPrivate);
priv = multicontext->priv;
priv->slave = NULL;
priv->use_preedit = TRUE;
priv->have_cursor_location = FALSE;
priv->focus_in = FALSE;
}
/**
* gtk_im_multicontext_new:
*
* Creates a new #GtkIMMulticontext.
*
* Returns: a new #GtkIMMulticontext.
**/
GtkIMContext *
gtk_im_multicontext_new (void)
{
return g_object_new (GTK_TYPE_IM_MULTICONTEXT, NULL);
}
static void
gtk_im_multicontext_finalize (GObject *object)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (object);
GtkIMMulticontextPrivate *priv = multicontext->priv;
gtk_im_multicontext_set_slave (multicontext, NULL, TRUE);
g_free (priv->context_id);
g_free (priv->context_id_aux);
G_OBJECT_CLASS (gtk_im_multicontext_parent_class)->finalize (object);
}
static void
gtk_im_multicontext_set_slave (GtkIMMulticontext *multicontext,
GtkIMContext *slave,
gboolean finalizing)
{
GtkIMMulticontextPrivate *priv = multicontext->priv;
gboolean need_preedit_changed = FALSE;
if (priv->slave)
{
if (!finalizing)
gtk_im_context_reset (priv->slave);
g_signal_handlers_disconnect_by_func (priv->slave,
gtk_im_multicontext_preedit_start_cb,
multicontext);
g_signal_handlers_disconnect_by_func (priv->slave,
gtk_im_multicontext_preedit_end_cb,
multicontext);
g_signal_handlers_disconnect_by_func (priv->slave,
gtk_im_multicontext_preedit_changed_cb,
multicontext);
g_signal_handlers_disconnect_by_func (priv->slave,
gtk_im_multicontext_commit_cb,
multicontext);
g_object_unref (priv->slave);
priv->slave = NULL;
if (!finalizing)
need_preedit_changed = TRUE;
}
priv->slave = slave;
if (priv->slave)
{
g_object_ref (priv->slave);
g_signal_connect (priv->slave, "preedit-start",
G_CALLBACK (gtk_im_multicontext_preedit_start_cb),
multicontext);
g_signal_connect (priv->slave, "preedit-end",
G_CALLBACK (gtk_im_multicontext_preedit_end_cb),
multicontext);
g_signal_connect (priv->slave, "preedit-changed",
G_CALLBACK (gtk_im_multicontext_preedit_changed_cb),
multicontext);
g_signal_connect (priv->slave, "commit",
G_CALLBACK (gtk_im_multicontext_commit_cb),
multicontext);
g_signal_connect (priv->slave, "retrieve-surrounding",
G_CALLBACK (gtk_im_multicontext_retrieve_surrounding_cb),
multicontext);
g_signal_connect (priv->slave, "delete-surrounding",
G_CALLBACK (gtk_im_multicontext_delete_surrounding_cb),
multicontext);
if (!priv->use_preedit) /* Default is TRUE */
gtk_im_context_set_use_preedit (slave, FALSE);
if (priv->client_window)
gtk_im_context_set_client_window (slave, priv->client_window);
if (priv->have_cursor_location)
gtk_im_context_set_cursor_location (slave, &priv->cursor_location);
if (priv->focus_in)
gtk_im_context_focus_in (slave);
}
if (need_preedit_changed)
g_signal_emit_by_name (multicontext, "preedit-changed");
}
static const gchar *
get_effective_context_id (GtkIMMulticontext *multicontext)
{
GtkIMMulticontextPrivate *priv = multicontext->priv;
if (priv->context_id_aux)
return priv->context_id_aux;
if (!global_context_id)
global_context_id = _gtk_im_module_get_default_context_id (priv->client_window);
return global_context_id;
}
static GtkIMContext *
gtk_im_multicontext_get_slave (GtkIMMulticontext *multicontext)
{
GtkIMMulticontextPrivate *priv = multicontext->priv;
if (!priv->slave)
{
GtkIMContext *slave;
g_free (priv->context_id);
priv->context_id = g_strdup (get_effective_context_id (multicontext));
if (g_strcmp0 (priv->context_id, NONE_ID) == 0)
return NULL;
slave = _gtk_im_module_create (priv->context_id);
gtk_im_multicontext_set_slave (multicontext, slave, FALSE);
g_object_unref (slave);
}
return priv->slave;
}
static void
im_module_setting_changed (GtkSettings *settings,
gpointer data)
{
global_context_id = NULL;
}
static void
gtk_im_multicontext_set_client_window (GtkIMContext *context,
GdkWindow *window)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMMulticontextPrivate *priv = multicontext->priv;
GdkScreen *screen;
GtkSettings *settings;
gboolean connected;
priv->client_window = window;
if (window)
{
screen = gdk_window_get_screen (window);
settings = gtk_settings_get_for_screen (screen);
connected = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (settings),
"gtk-im-module-connected"));
if (!connected)
{
g_signal_connect (settings, "notify::gtk-im-module",
G_CALLBACK (im_module_setting_changed), NULL);
g_object_set_data (G_OBJECT (settings), "gtk-im-module-connected",
GINT_TO_POINTER (TRUE));
global_context_id = NULL;
}
}
if (g_strcmp0 (priv->context_id, get_effective_context_id (multicontext)) != 0)
gtk_im_multicontext_set_slave (multicontext, NULL, FALSE);
if (priv->slave)
gtk_im_context_set_client_window (priv->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
{
GdkDisplay *display;
GdkModifierType no_text_input_mask;
display = gdk_window_get_display (event->window);
no_text_input_mask =
gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
GDK_MODIFIER_INTENT_NO_TEXT_INPUT);
if (event->type == GDK_KEY_PRESS &&
(event->state & no_text_input_mask) == 0)
{
gunichar ch;
ch = gdk_keyval_to_unicode (event->keyval);
if (ch != 0 && !g_unichar_iscntrl (ch))
{
gint len;
gchar buf[10];
len = g_unichar_to_utf8 (ch, buf);
buf[len] = '\0';
g_signal_emit_by_name (multicontext, "commit", buf);
return TRUE;
}
}
}
return FALSE;
}
static void
gtk_im_multicontext_focus_in (GtkIMContext *context)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMMulticontextPrivate *priv = multicontext->priv;
GtkIMContext *slave;
if (g_strcmp0 (priv->context_id, get_effective_context_id (multicontext)) != 0)
gtk_im_multicontext_set_slave (multicontext, NULL, FALSE);
slave = gtk_im_multicontext_get_slave (multicontext);
priv->focus_in = TRUE;
if (slave)
gtk_im_context_focus_in (slave);
}
static void
gtk_im_multicontext_focus_out (GtkIMContext *context)
{
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
GtkIMMulticontextPrivate *priv = multicontext->priv;
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
priv->focus_in = FALSE;
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);
GtkIMMulticontextPrivate *priv = multicontext->priv;
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
priv->have_cursor_location = TRUE;
priv->cursor_location = *area;
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);
GtkIMMulticontextPrivate *priv = multicontext->priv;
GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
use_preedit = use_preedit != FALSE;
priv->use_preedit = use_preedit;
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 (slave, 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_get_active (GTK_CHECK_MENU_ITEM (menuitem)))
{
const gchar *id = g_object_get_data (G_OBJECT (menuitem), "gtk-context-id");
gtk_im_multicontext_set_context_id (context, id);
}
}
static int
pathnamecmp (const char *a,
const char *b)
{
#ifndef G_OS_WIN32
return strcmp (a, b);
#else
/* Ignore case insensitivity, probably not that relevant here. Just
* make sure slash and backslash compare equal.
*/
while (*a && *b)
if ((G_IS_DIR_SEPARATOR (*a) && G_IS_DIR_SEPARATOR (*b)) ||
*a == *b)
a++, b++;
else
return (*a - *b);
return (*a - *b);
#endif
}
/**
* 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)
{
GtkIMMulticontextPrivate *priv = context->priv;
const GtkIMContextInfo **contexts;
guint n_contexts, i;
GSList *group = NULL;
GtkWidget *menuitem, *system_menuitem;
const char *system_context_id;
system_context_id = _gtk_im_module_get_default_context_id (priv->client_window);
system_menuitem = menuitem = gtk_radio_menu_item_new_with_label (group, C_("input method menu", "System"));
if (!priv->context_id_aux)
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menuitem), TRUE);
group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
g_object_set_data (G_OBJECT (menuitem), I_("gtk-context-id"), NULL);
g_signal_connect (menuitem, "activate", G_CALLBACK (activate_cb), context);
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
menuitem = gtk_radio_menu_item_new_with_label (group, C_("input method menu", "None"));
if (g_strcmp0 (priv->context_id_aux, NONE_ID) == 0)
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menuitem), TRUE);
g_object_set_data (G_OBJECT (menuitem), I_("gtk-context-id"), NONE_ID);
g_signal_connect (menuitem, "activate", G_CALLBACK (activate_cb), context);
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
menuitem = gtk_separator_menu_item_new ();
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
_gtk_im_module_list (&contexts, &n_contexts);
for (i = 0; i < n_contexts; i++)
{
const gchar *translated_name;
#ifdef ENABLE_NLS
if (contexts[i]->domain && contexts[i]->domain[0])
{
if (strcmp (contexts[i]->domain, GETTEXT_PACKAGE) == 0)
{
/* Same translation domain as GTK+ */
if (!(contexts[i]->domain_dirname && contexts[i]->domain_dirname[0]) ||
pathnamecmp (contexts[i]->domain_dirname, _gtk_get_localedir ()) == 0)
{
/* Empty or NULL, domain directory, or same as
* GTK+. Input method may have a name in the GTK+
* message catalog.
*/
translated_name = _(contexts[i]->context_name);
}
else
{
/* Separate domain directory but the same
* translation domain as GTK+. We can't call
* bindtextdomain() as that would make GTK+ forget
* its own messages.
*/
g_warning ("Input method %s should not use GTK's translation domain %s",
contexts[i]->context_id, GETTEXT_PACKAGE);
/* Try translating the name in GTK+'s domain */
translated_name = _(contexts[i]->context_name);
}
}
else if (contexts[i]->domain_dirname && contexts[i]->domain_dirname[0])
/* Input method has own translation domain and message catalog */
{
bindtextdomain (contexts[i]->domain,
contexts[i]->domain_dirname);
#ifdef HAVE_BIND_TEXTDOMAIN_CODESET
bind_textdomain_codeset (contexts[i]->domain, "UTF-8");
#endif
translated_name = g_dgettext (contexts[i]->domain, contexts[i]->context_name);
}
else
{
/* Different translation domain, but no domain directory */
translated_name = contexts[i]->context_name;
}
}
else
/* Empty or NULL domain. We assume that input method does not
* want a translated name in this case.
*/
translated_name = contexts[i]->context_name;
#else
translated_name = contexts[i]->context_name;
#endif
menuitem = gtk_radio_menu_item_new_with_label (group,
translated_name);
if ((priv->context_id_aux &&
strcmp (contexts[i]->context_id, priv->context_id_aux) == 0))
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menuitem), TRUE);
if (strcmp (contexts[i]->context_id, system_context_id) == 0)
{
GtkWidget *label;
char *text;
label = gtk_bin_get_child (GTK_BIN (system_menuitem));
text = g_strdup_printf (C_("input method menu", "System (%s)"), translated_name);
gtk_label_set_text (GTK_LABEL (label), text);
g_free (text);
}
group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
g_object_set_data (G_OBJECT (menuitem), I_("gtk-context-id"),
(char *)contexts[i]->context_id);
g_signal_connect (menuitem, "activate",
G_CALLBACK (activate_cb), context);
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
}
g_free (contexts);
}
/**
* gtk_im_multicontext_get_context_id:
* @context: a #GtkIMMulticontext
*
* Gets the id of the currently active slave of the @context.
*
* Returns: the id of the currently active slave
*
* Since: 2.16
*/
const char *
gtk_im_multicontext_get_context_id (GtkIMMulticontext *context)
{
g_return_val_if_fail (GTK_IS_IM_MULTICONTEXT (context), NULL);
return context->priv->context_id;
}
/**
* gtk_im_multicontext_set_context_id:
* @context: a #GtkIMMulticontext
* @context_id: the id to use
*
* Sets the context id for @context.
*
* This causes the currently active slave of @context to be
* replaced by the slave corresponding to the new context id.
*
* Since: 2.16
*/
void
gtk_im_multicontext_set_context_id (GtkIMMulticontext *context,
const char *context_id)
{
GtkIMMulticontextPrivate *priv;
g_return_if_fail (GTK_IS_IM_MULTICONTEXT (context));
priv = context->priv;
gtk_im_context_reset (GTK_IM_CONTEXT (context));
g_free (priv->context_id_aux);
priv->context_id_aux = g_strdup (context_id);
gtk_im_multicontext_set_slave (context, NULL, FALSE);
}
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