Pileus Git - ~andy/gtk/blob - gtk/gtkimmulticontext.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21
  22 #include <string.h>
  23 #include <locale.h>
  24
  25 #include "gtkimmulticontext.h"
  26 #include "gtkimmodule.h"
  27 #include "gtkmain.h"
  28 #include "gtkradiomenuitem.h"
  29 #include "gtkintl.h"
  30 #include "gtkprivate.h"
  31 #include "gtkalias.h"
  32
  33 struct _GtkIMMulticontextPrivate
  34 {
  35   GdkWindow *client_window;
  36   GdkRectangle cursor_location;
  37
  38   guint use_preedit : 1;
  39   guint have_cursor_location : 1;
  40   guint focus_in : 1;
  41 };
  42
  43 static void     gtk_im_multicontext_class_init         (GtkIMMulticontextClass  *class);
  44 static void     gtk_im_multicontext_init               (GtkIMMulticontext       *im_multicontext);
  45 static void     gtk_im_multicontext_finalize           (GObject                 *object);
  46
  47 static void     gtk_im_multicontext_set_slave          (GtkIMMulticontext       *multicontext,
  48                                                         GtkIMContext            *slave,
  49                                                         gboolean                 finalizing);
  50
  51 static void     gtk_im_multicontext_set_client_window  (GtkIMContext            *context,
  52                                                         GdkWindow               *window);
  53 static void     gtk_im_multicontext_get_preedit_string (GtkIMContext            *context,
  54                                                         gchar                  **str,
  55                                                         PangoAttrList          **attrs,
  56                                                         gint                   *cursor_pos);
  57 static gboolean gtk_im_multicontext_filter_keypress    (GtkIMContext            *context,
  58                                                         GdkEventKey             *event);
  59 static void     gtk_im_multicontext_focus_in           (GtkIMContext            *context);
  60 static void     gtk_im_multicontext_focus_out          (GtkIMContext            *context);
  61 static void     gtk_im_multicontext_reset              (GtkIMContext            *context);
  62 static void     gtk_im_multicontext_set_cursor_location (GtkIMContext            *context,
  63                                                         GdkRectangle            *area);
  64 static void     gtk_im_multicontext_set_use_preedit    (GtkIMContext            *context,
  65                                                         gboolean                 use_preedit);
  66 static gboolean gtk_im_multicontext_get_surrounding    (GtkIMContext            *context,
  67                                                         gchar                  **text,
  68                                                         gint                    *cursor_index);
  69 static void     gtk_im_multicontext_set_surrounding    (GtkIMContext            *context,
  70                                                         const char              *text,
  71                                                         gint                     len,
  72                                                         gint                     cursor_index);
  73
  74 static void     gtk_im_multicontext_preedit_start_cb        (GtkIMContext      *slave,
  75                                                              GtkIMMulticontext *multicontext);
  76 static void     gtk_im_multicontext_preedit_end_cb          (GtkIMContext      *slave,
  77                                                              GtkIMMulticontext *multicontext);
  78 static void     gtk_im_multicontext_preedit_changed_cb      (GtkIMContext      *slave,
  79                                                              GtkIMMulticontext *multicontext);
  80 static void     gtk_im_multicontext_commit_cb               (GtkIMContext      *slave,
  81                                                              const gchar       *str,
  82                                                              GtkIMMulticontext *multicontext);
  83 static gboolean gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext      *slave,
  84                                                              GtkIMMulticontext *multicontext);
  85 static gboolean gtk_im_multicontext_delete_surrounding_cb   (GtkIMContext      *slave,
  86                                                              gint               offset,
  87                                                              gint               n_chars,
  88                                                              GtkIMMulticontext *multicontext);
  89 static GtkIMContextClass *parent_class;
  90
  91 static const gchar *global_context_id = NULL;
  92
  93 GType
  94 gtk_im_multicontext_get_type (void)
  95 {
  96   static GType im_multicontext_type = 0;
  97
  98   if (!im_multicontext_type)
  99     {
 100       static const GTypeInfo im_multicontext_info =
 101       {
 102         sizeof (GtkIMMulticontextClass),
 103         (GBaseInitFunc) NULL,
 104         (GBaseFinalizeFunc) NULL,
 105         (GClassInitFunc) gtk_im_multicontext_class_init,
 106         NULL,           /* class_finalize */
 107         NULL,           /* class_data */
 108         sizeof (GtkIMMulticontext),
 109         0,              /* n_preallocs */
 110         (GInstanceInitFunc) gtk_im_multicontext_init,
 111       };
 112
 113       im_multicontext_type =
 114         g_type_register_static (GTK_TYPE_IM_CONTEXT, I_("GtkIMMulticontext"),
 115                                 &im_multicontext_info, 0);
 116     }
 117
 118   return im_multicontext_type;
 119 }
 120
 121 static void
 122 gtk_im_multicontext_class_init (GtkIMMulticontextClass *class)
 123 {
 124   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 125   GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
 126
 127   parent_class = g_type_class_peek_parent (class);
 128
 129   im_context_class->set_client_window = gtk_im_multicontext_set_client_window;
 130   im_context_class->get_preedit_string = gtk_im_multicontext_get_preedit_string;
 131   im_context_class->filter_keypress = gtk_im_multicontext_filter_keypress;
 132   im_context_class->focus_in = gtk_im_multicontext_focus_in;
 133   im_context_class->focus_out = gtk_im_multicontext_focus_out;
 134   im_context_class->reset = gtk_im_multicontext_reset;
 135   im_context_class->set_cursor_location = gtk_im_multicontext_set_cursor_location;
 136   im_context_class->set_use_preedit = gtk_im_multicontext_set_use_preedit;
 137   im_context_class->set_surrounding = gtk_im_multicontext_set_surrounding;
 138   im_context_class->get_surrounding = gtk_im_multicontext_get_surrounding;
 139
 140   gobject_class->finalize = gtk_im_multicontext_finalize;
 141
 142   g_type_class_add_private (gobject_class, sizeof (GtkIMMulticontextPrivate));
 143 }
 144
 145 static void
 146 gtk_im_multicontext_init (GtkIMMulticontext *multicontext)
 147 {
 148   multicontext->slave = NULL;
 149
 150   multicontext->priv = G_TYPE_INSTANCE_GET_PRIVATE (multicontext, GTK_TYPE_IM_MULTICONTEXT, GtkIMMulticontextPrivate);
 151   multicontext->priv->use_preedit = TRUE;
 152   multicontext->priv->have_cursor_location = FALSE;
 153   multicontext->priv->focus_in = FALSE;
 154 }
 155
 156 /**
 157  * gtk_im_multicontext_new:
 158  *
 159  * Creates a new #GtkIMMulticontext.
 160  *
 161  * Returns: a new #GtkIMMulticontext.
 162  **/
 163 GtkIMContext *
 164 gtk_im_multicontext_new (void)
 165 {
 166   return g_object_new (GTK_TYPE_IM_MULTICONTEXT, NULL);
 167 }
 168
 169 static void
 170 gtk_im_multicontext_finalize (GObject *object)
 171 {
 172   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (object);
 173
 174   gtk_im_multicontext_set_slave (multicontext, NULL, TRUE);
 175
 176   G_OBJECT_CLASS (parent_class)->finalize (object);
 177 }
 178
 179 static void
 180 gtk_im_multicontext_set_slave (GtkIMMulticontext *multicontext,
 181                                GtkIMContext      *slave,
 182                                gboolean           finalizing)
 183 {
 184   GtkIMMulticontextPrivate *priv = multicontext->priv;
 185   gboolean need_preedit_changed = FALSE;
 186
 187   if (multicontext->slave)
 188     {
 189       if (!finalizing)
 190         gtk_im_context_reset (multicontext->slave);
 191
 192       g_signal_handlers_disconnect_by_func (multicontext->slave,
 193                                             gtk_im_multicontext_preedit_start_cb,
 194                                             multicontext);
 195       g_signal_handlers_disconnect_by_func (multicontext->slave,
 196                                             gtk_im_multicontext_preedit_end_cb,
 197                                             multicontext);
 198       g_signal_handlers_disconnect_by_func (multicontext->slave,
 199                                             gtk_im_multicontext_preedit_changed_cb,
 200                                             multicontext);
 201       g_signal_handlers_disconnect_by_func (multicontext->slave,
 202                                             gtk_im_multicontext_commit_cb,
 203                                             multicontext);
 204
 205       g_object_unref (multicontext->slave);
 206       multicontext->slave = NULL;
 207
 208       if (!finalizing)
 209         need_preedit_changed = TRUE;
 210     }
 211
 212   multicontext->slave = slave;
 213
 214   if (multicontext->slave)
 215     {
 216       g_object_ref (multicontext->slave);
 217
 218       g_signal_connect (multicontext->slave, "preedit_start",
 219                         G_CALLBACK (gtk_im_multicontext_preedit_start_cb),
 220                         multicontext);
 221       g_signal_connect (multicontext->slave, "preedit_end",
 222                         G_CALLBACK (gtk_im_multicontext_preedit_end_cb),
 223                         multicontext);
 224       g_signal_connect (multicontext->slave, "preedit_changed",
 225                         G_CALLBACK (gtk_im_multicontext_preedit_changed_cb),
 226                         multicontext);
 227       g_signal_connect (multicontext->slave, "commit",
 228                         G_CALLBACK (gtk_im_multicontext_commit_cb),
 229                         multicontext);
 230       g_signal_connect (multicontext->slave, "retrieve_surrounding",
 231                         G_CALLBACK (gtk_im_multicontext_retrieve_surrounding_cb),
 232                         multicontext);
 233       g_signal_connect (multicontext->slave, "delete_surrounding",
 234                         G_CALLBACK (gtk_im_multicontext_delete_surrounding_cb),
 235                         multicontext);
 236
 237       if (!priv->use_preedit)   /* Default is TRUE */
 238         gtk_im_context_set_use_preedit (slave, FALSE);
 239       if (priv->client_window)
 240         gtk_im_context_set_client_window (slave, priv->client_window);
 241       if (priv->have_cursor_location)
 242         gtk_im_context_set_cursor_location (slave, &priv->cursor_location);
 243       if (priv->focus_in)
 244         gtk_im_context_focus_in (slave);
 245     }
 246
 247   if (need_preedit_changed)
 248     g_signal_emit_by_name (multicontext, "preedit_changed");
 249 }
 250
 251 static GtkIMContext *
 252 gtk_im_multicontext_get_slave (GtkIMMulticontext *multicontext)
 253 {
 254   if (!multicontext->slave)
 255     {
 256       GtkIMContext *slave;
 257
 258       if (!global_context_id)
 259         {
 260           gchar *locale = _gtk_get_lc_ctype ();
 261           global_context_id = _gtk_im_module_get_default_context_id (locale);
 262           g_free (locale);
 263         }
 264
 265       slave = _gtk_im_module_create (global_context_id);
 266       gtk_im_multicontext_set_slave (multicontext, slave, FALSE);
 267       g_object_unref (slave);
 268
 269       multicontext->context_id = global_context_id;
 270     }
 271
 272   return multicontext->slave;
 273 }
 274
 275 static void
 276 gtk_im_multicontext_set_client_window (GtkIMContext *context,
 277                                        GdkWindow    *window)
 278 {
 279   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 280
 281   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 282
 283   multicontext->priv->client_window = window;
 284
 285   if (slave)
 286     gtk_im_context_set_client_window (slave, window);
 287 }
 288
 289 static void
 290 gtk_im_multicontext_get_preedit_string (GtkIMContext   *context,
 291                                         gchar         **str,
 292                                         PangoAttrList **attrs,
 293                                         gint           *cursor_pos)
 294 {
 295   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 296   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 297
 298   if (slave)
 299     gtk_im_context_get_preedit_string (slave, str, attrs, cursor_pos);
 300   else
 301     {
 302       if (str)
 303         *str = g_strdup ("");
 304       if (attrs)
 305         *attrs = pango_attr_list_new ();
 306     }
 307 }
 308
 309 static gboolean
 310 gtk_im_multicontext_filter_keypress (GtkIMContext *context,
 311                                      GdkEventKey  *event)
 312 {
 313   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 314   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 315
 316   if (slave)
 317     return gtk_im_context_filter_keypress (slave, event);
 318   else
 319     return FALSE;
 320 }
 321
 322 static void
 323 gtk_im_multicontext_focus_in (GtkIMContext   *context)
 324 {
 325   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 326   GtkIMContext *slave;
 327
 328   /* If the global context type is different from the context we were
 329    * using before, get rid of the old slave and create a new one
 330    * for the new global context type.
 331    */
 332   if (!multicontext->context_id ||
 333       strcmp (global_context_id, multicontext->context_id) != 0)
 334     gtk_im_multicontext_set_slave (multicontext, NULL, FALSE);
 335
 336   slave = gtk_im_multicontext_get_slave (multicontext);
 337
 338   multicontext->priv->focus_in = TRUE;
 339
 340   if (slave)
 341     gtk_im_context_focus_in (slave);
 342 }
 343
 344 static void
 345 gtk_im_multicontext_focus_out (GtkIMContext   *context)
 346 {
 347   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 348   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 349
 350   multicontext->priv->focus_in = FALSE;
 351
 352   if (slave)
 353     gtk_im_context_focus_out (slave);
 354 }
 355
 356 static void
 357 gtk_im_multicontext_reset (GtkIMContext   *context)
 358 {
 359   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 360   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 361
 362   if (slave)
 363     gtk_im_context_reset (slave);
 364 }
 365
 366 static void
 367 gtk_im_multicontext_set_cursor_location (GtkIMContext   *context,
 368                                          GdkRectangle   *area)
 369 {
 370   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 371   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 372
 373   multicontext->priv->have_cursor_location = TRUE;
 374   multicontext->priv->cursor_location = *area;
 375
 376   if (slave)
 377     gtk_im_context_set_cursor_location (slave, area);
 378 }
 379
 380 static void
 381 gtk_im_multicontext_set_use_preedit (GtkIMContext   *context,
 382                                      gboolean       use_preedit)
 383 {
 384   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 385   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 386
 387   use_preedit = use_preedit != FALSE;
 388
 389   multicontext->priv->use_preedit = use_preedit;
 390
 391   if (slave)
 392     gtk_im_context_set_use_preedit (slave, use_preedit);
 393 }
 394
 395 static gboolean
 396 gtk_im_multicontext_get_surrounding (GtkIMContext  *context,
 397                                      gchar        **text,
 398                                      gint          *cursor_index)
 399 {
 400   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 401   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 402
 403   if (slave)
 404     return gtk_im_context_get_surrounding (slave, text, cursor_index);
 405   else
 406     {
 407       if (text)
 408         *text = NULL;
 409       if (cursor_index)
 410         *cursor_index = 0;
 411
 412       return FALSE;
 413     }
 414 }
 415
 416 static void
 417 gtk_im_multicontext_set_surrounding (GtkIMContext *context,
 418                                      const char   *text,
 419                                      gint          len,
 420                                      gint          cursor_index)
 421 {
 422   GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT (context);
 423   GtkIMContext *slave = gtk_im_multicontext_get_slave (multicontext);
 424
 425   if (slave)
 426     gtk_im_context_set_surrounding (slave, text, len, cursor_index);
 427 }
 428
 429 static void
 430 gtk_im_multicontext_preedit_start_cb   (GtkIMContext      *slave,
 431                                         GtkIMMulticontext *multicontext)
 432 {
 433   g_signal_emit_by_name (multicontext, "preedit_start");
 434 }
 435
 436 static void
 437 gtk_im_multicontext_preedit_end_cb (GtkIMContext      *slave,
 438                                     GtkIMMulticontext *multicontext)
 439 {
 440   g_signal_emit_by_name (multicontext, "preedit_end");
 441 }
 442
 443 static void
 444 gtk_im_multicontext_preedit_changed_cb (GtkIMContext      *slave,
 445                                         GtkIMMulticontext *multicontext)
 446 {
 447   g_signal_emit_by_name (multicontext, "preedit_changed");
 448 }
 449
 450 static void
 451 gtk_im_multicontext_commit_cb (GtkIMContext      *slave,
 452                                const gchar       *str,
 453                                GtkIMMulticontext *multicontext)
 454 {
 455   g_signal_emit_by_name (multicontext, "commit", str);;
 456 }
 457
 458 static gboolean
 459 gtk_im_multicontext_retrieve_surrounding_cb (GtkIMContext      *slave,
 460                                              GtkIMMulticontext *multicontext)
 461 {
 462   gboolean result;
 463
 464   g_signal_emit_by_name (multicontext, "retrieve_surrounding", &result);
 465
 466   return result;
 467 }
 468
 469 static gboolean
 470 gtk_im_multicontext_delete_surrounding_cb (GtkIMContext      *slave,
 471                                            gint               offset,
 472                                            gint               n_chars,
 473                                            GtkIMMulticontext *multicontext)
 474 {
 475   gboolean result;
 476
 477   g_signal_emit_by_name (multicontext, "delete_surrounding",
 478                          offset, n_chars, &result);
 479
 480   return result;
 481 }
 482
 483 static void
 484 activate_cb (GtkWidget         *menuitem,
 485              GtkIMMulticontext *context)
 486 {
 487   if (GTK_CHECK_MENU_ITEM (menuitem)->active)
 488     {
 489       const gchar *id = g_object_get_data (G_OBJECT (menuitem), "gtk-context-id");
 490
 491       gtk_im_context_reset (GTK_IM_CONTEXT (context));
 492
 493       global_context_id = id;
 494       gtk_im_multicontext_set_slave (context, NULL, FALSE);
 495     }
 496 }
 497
 498 /**
 499  * gtk_im_multicontext_append_menuitems:
 500  * @context: a #GtkIMMultiContext
 501  * @menushell: a #GtkMenuShell
 502  *
 503  * Add menuitems for various available input methods to a menu;
 504  * the menuitems, when selected, will switch the input method
 505  * for the context and the global default input method.
 506  **/
 507 void
 508 gtk_im_multicontext_append_menuitems (GtkIMMulticontext *context,
 509                                       GtkMenuShell      *menushell)
 510 {
 511   const GtkIMContextInfo **contexts;
 512   guint n_contexts, i;
 513   GSList *group = NULL;
 514
 515   _gtk_im_module_list (&contexts, &n_contexts);
 516
 517   for (i=0; i < n_contexts; i++)
 518     {
 519       GtkWidget *menuitem;
 520       const gchar *translated_name;
 521 #ifdef ENABLE_NLS
 522       if (contexts[i]->domain && contexts[i]->domain_dirname &&
 523           contexts[i]->domain[0] && contexts[i]->domain_dirname[0])
 524         {
 525           if (strcmp (contexts[i]->domain, GETTEXT_PACKAGE) == 0 &&
 526               strcmp (contexts[i]->domain_dirname, GTK_LOCALEDIR) == 0)
 527             /* Input method may have a name in the GTK+ message catalog */
 528             translated_name = _(contexts[i]->context_name);
 529           else
 530             /* Input method has own message catalog */
 531             {
 532               bindtextdomain (contexts[i]->domain,
 533                               contexts[i]->domain_dirname);
 534 #ifdef HAVE_BIND_TEXTDOMAIN_CODESET
 535               bind_textdomain_codeset (contexts[i]->domain, "UTF-8");
 536 #endif
 537               translated_name = dgettext (contexts[i]->domain, contexts[i]->context_name);
 538             }
 539         }
 540       else
 541         /* Either domain or domain_dirname is NULL or "". We assume that
 542          * input method does not want a translated name in this case
 543          */
 544         translated_name = contexts[i]->context_name;
 545 #else
 546       translated_name = contexts[i]->context_name;
 547 #endif
 548       menuitem = gtk_radio_menu_item_new_with_label (group,
 549                                                      translated_name);
 550
 551       if ((global_context_id == NULL && group == NULL) ||
 552           (global_context_id &&
 553            strcmp (contexts[i]->context_id, global_context_id) == 0))
 554         gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menuitem),
 555                                         TRUE);
 556
 557       group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menuitem));
 558
 559       g_object_set_data (G_OBJECT (menuitem), I_("gtk-context-id"),
 560                          (char *)contexts[i]->context_id);
 561       g_signal_connect (menuitem, "activate",
 562                         G_CALLBACK (activate_cb), context);
 563
 564       gtk_widget_show (menuitem);
 565       gtk_menu_shell_append (menushell, menuitem);
 566     }
 567
 568   g_free (contexts);
 569 }
 570
 571 #define __GTK_IM_MULTICONTEXT_C__
 572 #include "gtkaliasdef.c"