656 lines
20 KiB
C
656 lines
20 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2000 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <locale.h>
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#include "gtkimcontextprivate.h"
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#include "gtkimmulticontext.h"
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#include "gtkimmoduleprivate.h"
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#include "gtklabel.h"
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#include "gtkmain.h"
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#include "gtkprivate.h"
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#include "gtksettings.h"
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/**
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* GtkIMMulticontext:
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*
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* `GtkIMMulticontext` is an input method context supporting multiple,
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* switchable input methods.
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*
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* Text widgets such as `GtkText` or `GtkTextView` use a `GtkIMMultiContext`
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* to implement their `im-module` property for switching between different
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* input methods.
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*/
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struct _GtkIMMulticontextPrivate
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{
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GtkIMContext *delegate;
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GtkWidget *client_widget;
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GdkRectangle cursor_location;
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char *context_id;
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char *context_id_aux;
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guint use_preedit : 1;
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guint have_cursor_location : 1;
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guint focus_in : 1;
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};
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static void gtk_im_multicontext_notify (GObject *object,
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GParamSpec *pspec);
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static void gtk_im_multicontext_finalize (GObject *object);
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static void gtk_im_multicontext_set_delegate (GtkIMMulticontext *multicontext,
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GtkIMContext *delegate,
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gboolean finalizing);
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static void gtk_im_multicontext_set_client_widget (GtkIMContext *context,
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GtkWidget *widget);
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static void gtk_im_multicontext_get_preedit_string (GtkIMContext *context,
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char **str,
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PangoAttrList **attrs,
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int *cursor_pos);
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static gboolean gtk_im_multicontext_filter_keypress (GtkIMContext *context,
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GdkEvent *event);
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static void gtk_im_multicontext_focus_in (GtkIMContext *context);
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static void gtk_im_multicontext_focus_out (GtkIMContext *context);
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static void gtk_im_multicontext_reset (GtkIMContext *context);
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static void gtk_im_multicontext_set_cursor_location (GtkIMContext *context,
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GdkRectangle *area);
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static void gtk_im_multicontext_set_use_preedit (GtkIMContext *context,
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gboolean use_preedit);
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static gboolean gtk_im_multicontext_get_surrounding_with_selection
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(GtkIMContext *context,
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char **text,
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int *cursor_index,
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int *anchor_index);
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static void gtk_im_multicontext_set_surrounding_with_selection
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(GtkIMContext *context,
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const char *text,
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int len,
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int cursor_index,
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int anchor_index);
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static void gtk_im_multicontext_preedit_start_cb (GtkIMContext *delegate,
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GtkIMMulticontext *multicontext);
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static void gtk_im_multicontext_preedit_end_cb (GtkIMContext *delegate,
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GtkIMMulticontext *multicontext);
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static void gtk_im_multicontext_preedit_changed_cb (GtkIMContext *delegate,
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GtkIMMulticontext *multicontext);
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static void gtk_im_multicontext_commit_cb (GtkIMContext *delegate,
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const char *str,
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GtkIMMulticontext *multicontext);
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static gboolean gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext *delegate,
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GtkIMMulticontext *multicontext);
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static gboolean gtk_im_multicontext_delete_surrounding_cb (GtkIMContext *delegate,
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int offset,
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int n_chars,
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GtkIMMulticontext *multicontext);
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static void gtk_im_multicontext_activate_osk (GtkIMContext *context);
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static void propagate_purpose (GtkIMMulticontext *context);
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G_DEFINE_TYPE_WITH_PRIVATE (GtkIMMulticontext, gtk_im_multicontext, GTK_TYPE_IM_CONTEXT)
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static void
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gtk_im_multicontext_class_init (GtkIMMulticontextClass *class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
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gobject_class->notify = gtk_im_multicontext_notify;
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im_context_class->set_client_widget = gtk_im_multicontext_set_client_widget;
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im_context_class->get_preedit_string = gtk_im_multicontext_get_preedit_string;
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im_context_class->filter_keypress = gtk_im_multicontext_filter_keypress;
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im_context_class->focus_in = gtk_im_multicontext_focus_in;
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im_context_class->focus_out = gtk_im_multicontext_focus_out;
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im_context_class->reset = gtk_im_multicontext_reset;
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im_context_class->set_cursor_location = gtk_im_multicontext_set_cursor_location;
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im_context_class->set_use_preedit = gtk_im_multicontext_set_use_preedit;
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im_context_class->set_surrounding_with_selection = gtk_im_multicontext_set_surrounding_with_selection;
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im_context_class->get_surrounding_with_selection = gtk_im_multicontext_get_surrounding_with_selection;
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im_context_class->activate_osk = gtk_im_multicontext_activate_osk;
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gobject_class->finalize = gtk_im_multicontext_finalize;
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}
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static void
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gtk_im_multicontext_init (GtkIMMulticontext *multicontext)
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{
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GtkIMMulticontextPrivate *priv;
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multicontext->priv = gtk_im_multicontext_get_instance_private (multicontext);
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priv = multicontext->priv;
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priv->delegate = NULL;
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priv->use_preedit = TRUE;
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priv->have_cursor_location = FALSE;
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priv->focus_in = FALSE;
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}
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/**
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* gtk_im_multicontext_new:
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*
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* Creates a new `GtkIMMulticontext`.
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*
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* Returns: a new `GtkIMMulticontext`.
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*/
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GtkIMContext *
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gtk_im_multicontext_new (void)
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{
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return g_object_new (GTK_TYPE_IM_MULTICONTEXT, NULL);
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}
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static void
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gtk_im_multicontext_finalize (GObject *object)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (object);
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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gtk_im_multicontext_set_delegate (multicontext, NULL, TRUE);
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g_free (priv->context_id);
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g_free (priv->context_id_aux);
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G_OBJECT_CLASS (gtk_im_multicontext_parent_class)->finalize (object);
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}
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static void
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gtk_im_multicontext_set_delegate (GtkIMMulticontext *multicontext,
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GtkIMContext *delegate,
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gboolean finalizing)
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{
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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gboolean need_preedit_changed = FALSE;
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if (priv->delegate)
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{
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if (!finalizing)
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gtk_im_context_reset (priv->delegate);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_preedit_start_cb,
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multicontext);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_preedit_end_cb,
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multicontext);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_preedit_changed_cb,
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multicontext);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_commit_cb,
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multicontext);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_retrieve_surrounding_cb,
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multicontext);
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g_signal_handlers_disconnect_by_func (priv->delegate,
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gtk_im_multicontext_delete_surrounding_cb,
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multicontext);
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if (priv->client_widget)
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gtk_im_context_set_client_widget (priv->delegate, NULL);
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g_object_unref (priv->delegate);
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priv->delegate = NULL;
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if (!finalizing)
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need_preedit_changed = TRUE;
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}
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priv->delegate = delegate;
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if (priv->delegate)
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{
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g_object_ref (priv->delegate);
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propagate_purpose (multicontext);
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g_signal_connect (priv->delegate, "preedit-start",
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G_CALLBACK (gtk_im_multicontext_preedit_start_cb),
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multicontext);
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g_signal_connect (priv->delegate, "preedit-end",
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G_CALLBACK (gtk_im_multicontext_preedit_end_cb),
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multicontext);
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g_signal_connect (priv->delegate, "preedit-changed",
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G_CALLBACK (gtk_im_multicontext_preedit_changed_cb),
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multicontext);
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g_signal_connect (priv->delegate, "commit",
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G_CALLBACK (gtk_im_multicontext_commit_cb),
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multicontext);
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g_signal_connect (priv->delegate, "retrieve-surrounding",
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G_CALLBACK (gtk_im_multicontext_retrieve_surrounding_cb),
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multicontext);
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g_signal_connect (priv->delegate, "delete-surrounding",
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G_CALLBACK (gtk_im_multicontext_delete_surrounding_cb),
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multicontext);
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if (!priv->use_preedit) /* Default is TRUE */
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gtk_im_context_set_use_preedit (delegate, FALSE);
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if (priv->client_widget)
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gtk_im_context_set_client_widget (delegate, priv->client_widget);
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if (priv->have_cursor_location)
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gtk_im_context_set_cursor_location (delegate, &priv->cursor_location);
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if (priv->focus_in)
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gtk_im_context_focus_in (delegate);
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}
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if (need_preedit_changed)
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g_signal_emit_by_name (multicontext, "preedit-changed");
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}
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static const char *
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get_effective_context_id (GtkIMMulticontext *multicontext)
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{
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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GdkDisplay *display;
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if (priv->context_id_aux)
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return priv->context_id_aux;
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if (priv->client_widget)
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display = gtk_widget_get_display (priv->client_widget);
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else
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display = gdk_display_get_default ();
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return _gtk_im_module_get_default_context_id (display);
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}
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static GtkIMContext *
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gtk_im_multicontext_get_delegate (GtkIMMulticontext *multicontext)
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{
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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if (!priv->delegate)
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{
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GtkIMContext *delegate;
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g_free (priv->context_id);
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priv->context_id = g_strdup (get_effective_context_id (multicontext));
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delegate = _gtk_im_module_create (priv->context_id);
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if (delegate)
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{
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gtk_im_multicontext_set_delegate (multicontext, delegate, FALSE);
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g_object_unref (delegate);
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}
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}
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return priv->delegate;
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}
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static void
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im_module_setting_changed (GtkSettings *settings,
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GParamSpec *pspec,
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GtkIMMulticontext *self)
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{
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gtk_im_multicontext_set_delegate (self, NULL, FALSE);
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}
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static void
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gtk_im_multicontext_set_client_widget (GtkIMContext *context,
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GtkWidget *widget)
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{
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GtkIMMulticontext *self = GTK_IM_MULTICONTEXT (context);
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GtkIMMulticontextPrivate *priv = self->priv;
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GtkIMContext *delegate;
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GtkSettings *settings;
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if (priv->client_widget == widget)
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return;
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gtk_im_multicontext_set_delegate (self, NULL, TRUE);
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if (priv->client_widget != NULL)
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{
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settings = gtk_widget_get_settings (priv->client_widget);
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g_signal_handlers_disconnect_by_func (settings,
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im_module_setting_changed,
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self);
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}
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priv->client_widget = widget;
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if (widget)
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{
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settings = gtk_widget_get_settings (widget);
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g_signal_connect (settings, "notify::gtk-im-module",
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G_CALLBACK (im_module_setting_changed),
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self);
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delegate = gtk_im_multicontext_get_delegate (self);
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if (delegate)
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gtk_im_context_set_client_widget (delegate, widget);
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}
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}
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static void
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gtk_im_multicontext_get_preedit_string (GtkIMContext *context,
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char **str,
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PangoAttrList **attrs,
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int *cursor_pos)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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if (delegate)
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gtk_im_context_get_preedit_string (delegate, str, attrs, cursor_pos);
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else
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{
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if (str)
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*str = g_strdup ("");
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if (attrs)
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*attrs = pango_attr_list_new ();
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}
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}
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static gboolean
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gtk_im_multicontext_filter_keypress (GtkIMContext *context,
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GdkEvent *event)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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guint keyval, state;
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if (delegate)
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{
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return gtk_im_context_filter_keypress (delegate, event);
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}
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else
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{
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GdkModifierType no_text_input_mask;
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keyval = gdk_key_event_get_keyval (event);
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state = gdk_event_get_modifier_state (event);
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no_text_input_mask = GDK_ALT_MASK|GDK_CONTROL_MASK;
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if (gdk_event_get_event_type (event) == GDK_KEY_PRESS &&
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(state & no_text_input_mask) == 0)
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{
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gunichar ch;
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ch = gdk_keyval_to_unicode (keyval);
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if (ch != 0 && !g_unichar_iscntrl (ch))
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{
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int len;
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char buf[10];
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len = g_unichar_to_utf8 (ch, buf);
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buf[len] = '\0';
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g_signal_emit_by_name (multicontext, "commit", buf);
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return TRUE;
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}
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}
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}
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return FALSE;
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}
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static void
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gtk_im_multicontext_focus_in (GtkIMContext *context)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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priv->focus_in = TRUE;
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if (delegate)
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gtk_im_context_focus_in (delegate);
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}
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static void
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gtk_im_multicontext_focus_out (GtkIMContext *context)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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priv->focus_in = FALSE;
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if (delegate)
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gtk_im_context_focus_out (delegate);
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}
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static void
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gtk_im_multicontext_reset (GtkIMContext *context)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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if (delegate)
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gtk_im_context_reset (delegate);
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}
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static void
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gtk_im_multicontext_set_cursor_location (GtkIMContext *context,
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GdkRectangle *area)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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priv->have_cursor_location = TRUE;
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priv->cursor_location = *area;
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if (delegate)
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gtk_im_context_set_cursor_location (delegate, area);
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}
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static void
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gtk_im_multicontext_set_use_preedit (GtkIMContext *context,
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gboolean use_preedit)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMMulticontextPrivate *priv = multicontext->priv;
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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use_preedit = use_preedit != FALSE;
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priv->use_preedit = use_preedit;
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if (delegate)
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gtk_im_context_set_use_preedit (delegate, use_preedit);
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}
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static gboolean
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gtk_im_multicontext_get_surrounding_with_selection (GtkIMContext *context,
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char **text,
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int *cursor_index,
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int *anchor_index)
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{
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GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
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GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
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if (delegate)
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return gtk_im_context_get_surrounding_with_selection (delegate, text, cursor_index, anchor_index);
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else
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{
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if (text)
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*text = NULL;
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if (cursor_index)
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*cursor_index = 0;
|
|
if (anchor_index)
|
|
*anchor_index = 0;
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_set_surrounding_with_selection (GtkIMContext *context,
|
|
const char *text,
|
|
int len,
|
|
int cursor_index,
|
|
int anchor_index)
|
|
{
|
|
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
|
|
GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
|
|
|
|
if (delegate)
|
|
gtk_im_context_set_surrounding_with_selection (delegate, text, len, cursor_index, anchor_index);
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_activate_osk (GtkIMContext *context)
|
|
{
|
|
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
|
|
GtkIMContext *delegate = gtk_im_multicontext_get_delegate (multicontext);
|
|
|
|
if (delegate)
|
|
gtk_im_context_activate_osk (delegate);
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_preedit_start_cb (GtkIMContext *delegate,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
g_signal_emit_by_name (multicontext, "preedit-start");
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_preedit_end_cb (GtkIMContext *delegate,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
g_signal_emit_by_name (multicontext, "preedit-end");
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_preedit_changed_cb (GtkIMContext *delegate,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
g_signal_emit_by_name (multicontext, "preedit-changed");
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_commit_cb (GtkIMContext *delegate,
|
|
const char *str,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
g_signal_emit_by_name (multicontext, "commit", str);
|
|
}
|
|
|
|
static gboolean
|
|
gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext *delegate,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
gboolean result;
|
|
|
|
g_signal_emit_by_name (multicontext, "retrieve-surrounding", &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gtk_im_multicontext_delete_surrounding_cb (GtkIMContext *delegate,
|
|
int offset,
|
|
int n_chars,
|
|
GtkIMMulticontext *multicontext)
|
|
{
|
|
gboolean result;
|
|
|
|
g_signal_emit_by_name (multicontext, "delete-surrounding",
|
|
offset, n_chars, &result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gtk_im_multicontext_get_context_id:
|
|
* @context: a `GtkIMMulticontext`
|
|
*
|
|
* Gets the id of the currently active delegate of the @context.
|
|
*
|
|
* Returns: the id of the currently active delegate
|
|
*/
|
|
const char *
|
|
gtk_im_multicontext_get_context_id (GtkIMMulticontext *context)
|
|
{
|
|
GtkIMMulticontextPrivate *priv = context->priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_IM_MULTICONTEXT (context), NULL);
|
|
|
|
if (priv->context_id == NULL)
|
|
gtk_im_multicontext_get_delegate (context);
|
|
|
|
return priv->context_id;
|
|
}
|
|
|
|
/**
|
|
* gtk_im_multicontext_set_context_id:
|
|
* @context: a `GtkIMMulticontext`
|
|
* @context_id: (nullable): the id to use
|
|
*
|
|
* Sets the context id for @context.
|
|
*
|
|
* This causes the currently active delegate of @context to be
|
|
* replaced by the delegate corresponding to the new context id.
|
|
*
|
|
* Setting this to a non-%NULL value overrides the system-wide
|
|
* IM module setting. See the [property@Gtk.Settings:gtk-im-module]
|
|
* property.
|
|
*/
|
|
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_delegate (context, NULL, FALSE);
|
|
}
|
|
|
|
static void
|
|
propagate_purpose (GtkIMMulticontext *context)
|
|
{
|
|
GtkInputPurpose purpose;
|
|
GtkInputHints hints;
|
|
|
|
if (context->priv->delegate == NULL)
|
|
return;
|
|
|
|
g_object_get (context, "input-purpose", &purpose, NULL);
|
|
g_object_set (context->priv->delegate, "input-purpose", purpose, NULL);
|
|
|
|
g_object_get (context, "input-hints", &hints, NULL);
|
|
g_object_set (context->priv->delegate, "input-hints", hints, NULL);
|
|
}
|
|
|
|
static void
|
|
gtk_im_multicontext_notify (GObject *object,
|
|
GParamSpec *pspec)
|
|
{
|
|
propagate_purpose (GTK_IM_MULTICONTEXT (object));
|
|
}
|