gtkimcontextxim.c 36.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
/* 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 "locale.h"
#include <string.h>

23
#include "gtk/gtkintl.h"
24
#include "gtk/gtklabel.h"
25
#include "gtk/gtksignal.h"
26
#include "gtk/gtkwindow.h"
27 28
#include "gtkimcontextxim.h"

29 30
typedef struct _StatusWindow StatusWindow;

31 32
struct _GtkXIMInfo
{
33
  GdkScreen *screen;
34 35
  XIM im;
  char *locale;
36 37
  XIMStyle preedit_style_setting;
  XIMStyle status_style_setting;
38
  XIMStyle style;
39 40 41 42
  GtkSettings *settings;
  gulong status_set;
  gulong preedit_set;
  XIMStyles *xim_styles;
43
  GSList *ics;
44 45
};

46 47 48 49 50 51 52 53 54
/* A context status window; these are kept in the status_windows list. */
struct _StatusWindow
{
  GtkWidget *window;
  
  /* Toplevel window to which the status window corresponds */
  GtkWidget *toplevel;
  
  /* Signal connection ids; we connect to the toplevel */
55 56
  gulong destroy_handler_id;
  gulong configure_handler_id;
57 58
};

59 60 61 62 63 64 65 66
static void     gtk_im_context_xim_class_init         (GtkIMContextXIMClass  *class);
static void     gtk_im_context_xim_init               (GtkIMContextXIM       *im_context_xim);
static void     gtk_im_context_xim_finalize           (GObject               *obj);
static void     gtk_im_context_xim_set_client_window  (GtkIMContext          *context,
						       GdkWindow             *client_window);
static gboolean gtk_im_context_xim_filter_keypress    (GtkIMContext          *context,
						       GdkEventKey           *key);
static void     gtk_im_context_xim_reset              (GtkIMContext          *context);
67 68
static void     gtk_im_context_xim_focus_in           (GtkIMContext          *context);
static void     gtk_im_context_xim_focus_out          (GtkIMContext          *context);
69
static void     gtk_im_context_xim_set_cursor_location (GtkIMContext          *context,
70
						       GdkRectangle		*area);
71 72
static void     gtk_im_context_xim_set_use_preedit    (GtkIMContext          *context,
						       gboolean		      use_preedit);
73 74 75 76 77
static void     gtk_im_context_xim_get_preedit_string (GtkIMContext          *context,
						       gchar                **str,
						       PangoAttrList        **attrs,
						       gint                  *cursor_pos);

78 79 80 81 82 83
static void reinitialize_ic      (GtkIMContextXIM *context_xim,
				  gboolean         send_signal);
static void set_ic_client_window (GtkIMContextXIM *context_xim,
				  GdkWindow       *client_window,
				  gboolean         send_signal);

84 85
static void setup_styles (GtkXIMInfo *info);

86 87 88 89 90
static void status_window_show     (GtkIMContextXIM *context_xim);
static void status_window_hide     (GtkIMContextXIM *context_xim);
static void status_window_set_text (GtkIMContextXIM *context_xim,
				    const gchar     *text);

91 92 93 94 95
static XIC       gtk_im_context_xim_get_ic            (GtkIMContextXIM *context_xim);
static GObjectClass *parent_class;

GType gtk_type_im_context_xim = 0;

96
GSList *open_ims = NULL;
97

98 99 100
/* List of status windows for different toplevels */
static GSList *status_windows = NULL;

101 102 103 104 105 106 107 108 109 110 111 112 113
void
gtk_im_context_xim_register_type (GTypeModule *type_module)
{
  static const GTypeInfo im_context_xim_info =
  {
    sizeof (GtkIMContextXIMClass),
    (GBaseInitFunc) NULL,
    (GBaseFinalizeFunc) NULL,
    (GClassInitFunc) gtk_im_context_xim_class_init,
    NULL,           /* class_finalize */    
    NULL,           /* class_data */
    sizeof (GtkIMContextXIM),
    0,
Manish Singh's avatar
Manish Singh committed
114
    (GInstanceInitFunc) gtk_im_context_xim_init,
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169
  };

  gtk_type_im_context_xim = 
    g_type_module_register_type (type_module,
				 GTK_TYPE_IM_CONTEXT,
				 "GtkIMContextXIM",
				 &im_context_xim_info, 0);
}

#define PREEDIT_MASK (XIMPreeditCallbacks | XIMPreeditPosition | \
		      XIMPreeditArea | XIMPreeditNothing | XIMPreeditNone)
#define STATUS_MASK (XIMStatusCallbacks | XIMStatusArea | \
		      XIMStatusNothing | XIMStatusNone)
#define ALLOWED_MASK (XIMPreeditCallbacks | XIMPreeditNothing | XIMPreeditNone | \
		      XIMStatusCallbacks | XIMStatusNothing | XIMStatusNone)

static XIMStyle 
choose_better_style (XIMStyle style1, XIMStyle style2) 
{
  XIMStyle s1, s2, u; 
  
  if (style1 == 0) return style2;
  if (style2 == 0) return style1;
  if ((style1 & (PREEDIT_MASK | STATUS_MASK))
    	== (style2 & (PREEDIT_MASK | STATUS_MASK)))
    return style1;

  s1 = style1 & PREEDIT_MASK;
  s2 = style2 & PREEDIT_MASK;
  u = s1 | s2;
  if (s1 != s2) {
    if (u & XIMPreeditCallbacks)
      return (s1 == XIMPreeditCallbacks) ? style1 : style2;
    else if (u & XIMPreeditPosition)
      return (s1 == XIMPreeditPosition) ? style1 :style2;
    else if (u & XIMPreeditArea)
      return (s1 == XIMPreeditArea) ? style1 : style2;
    else if (u & XIMPreeditNothing)
      return (s1 == XIMPreeditNothing) ? style1 : style2;
  } else {
    s1 = style1 & STATUS_MASK;
    s2 = style2 & STATUS_MASK;
    u = s1 | s2;
    if (u & XIMStatusCallbacks)
      return (s1 == XIMStatusCallbacks) ? style1 : style2;
    else if (u & XIMStatusArea)
      return (s1 == XIMStatusArea) ? style1 : style2;
    else if (u & XIMStatusNothing)
      return (s1 == XIMStatusNothing) ? style1 : style2;
    else if (u & XIMStatusNone)
      return (s1 == XIMStatusNone) ? style1 : style2;
  }
  return 0; /* Get rid of stupid warning */
}

170 171 172 173 174 175 176 177 178
static void
reinitialize_all_ics (GtkXIMInfo *info)
{
  GSList *tmp_list;

  for (tmp_list = info->ics; tmp_list; tmp_list = tmp_list->next)
    reinitialize_ic (tmp_list->data, TRUE);
}

179
static void
180
status_style_change (GtkXIMInfo *info)
181
{
182
  GtkIMStatusStyle status_style;
183
  
184 185 186 187 188 189 190 191 192
  g_object_get (info->settings,
		"gtk-im-status-style", &status_style,
		NULL);
  if (status_style == GTK_IM_STATUS_CALLBACK)
    info->status_style_setting = XIMStatusCallbacks;
  else if (status_style == GTK_IM_STATUS_NOTHING)
    info->status_style_setting = XIMStatusNothing;
  else
    return;
193

194
  setup_styles (info);
195 196
  
  reinitialize_all_ics (info);
197
}
198

199 200 201 202 203 204
static void
preedit_style_change (GtkXIMInfo *info)
{
  GtkIMPreeditStyle preedit_style;
  g_object_get (info->settings,
		"gtk-im-preedit-style", &preedit_style,
205
		NULL);
206 207 208 209 210 211 212 213
  if (preedit_style == GTK_IM_PREEDIT_CALLBACK)
    info->preedit_style_setting = XIMPreeditCallbacks;
  else if (preedit_style == GTK_IM_PREEDIT_NOTHING)
    info->preedit_style_setting = XIMPreeditNothing;
  else
    return;

  setup_styles (info);
214 215
  
  reinitialize_all_ics (info);
216
}
217

218 219 220 221 222 223 224 225
static void
setup_styles (GtkXIMInfo *info)
{
  int i;
  unsigned long settings_preference;
  XIMStyles *xim_styles = info->xim_styles;

  settings_preference = info->status_style_setting|info->preedit_style_setting;
226 227 228 229
  if (xim_styles)
    {
      for (i = 0; i < xim_styles->count_styles; i++)
	if ((xim_styles->supported_styles[i] & ALLOWED_MASK) == xim_styles->supported_styles[i])
230
	  {
231
	    if (settings_preference == xim_styles->supported_styles[i])
232
	      {
233
		info->style = settings_preference;
234 235 236 237 238
		break;
	      }
	    info->style = choose_better_style (info->style,
					       xim_styles->supported_styles[i]);
	  }
239
    }
240 241 242
}

static void
243
setup_im (GtkXIMInfo *info)
244 245 246
{
  XIMValuesList *ic_values = NULL;

247 248 249
  if (info->im == NULL)
    return;

250 251 252 253
  XGetIMValues (info->im,
		XNQueryInputStyle, &info->xim_styles,
		XNQueryICValuesList, &ic_values,
		NULL);
254

255
  info->settings = gtk_settings_get_for_screen (info->screen);
256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273

  if (!g_object_class_find_property (G_OBJECT_GET_CLASS (info->settings),
				     "gtk-im-preedit-style"))
    gtk_settings_install_property (g_param_spec_enum ("gtk-im-preedit-style",
						      _("IM Preedit style"),
						      _("How to draw the input method preedit string"),
						      GTK_TYPE_IM_PREEDIT_STYLE,
						      GTK_IM_PREEDIT_CALLBACK,
						      G_PARAM_READWRITE));

  if (!g_object_class_find_property (G_OBJECT_GET_CLASS (info->settings),
				     "gtk-im-status-style"))
    gtk_settings_install_property (g_param_spec_enum ("gtk-im-status-style",
						      _("IM Status style"),
						      _("How to draw the input method statusbar"),
						      GTK_TYPE_IM_STATUS_STYLE,
						      GTK_IM_STATUS_CALLBACK,
						      G_PARAM_READWRITE));
274 275 276 277 278 279 280 281 282 283

  info->status_set = g_signal_connect_swapped (info->settings,
					       "notify::gtk-im-status-style",
					       G_CALLBACK (status_style_change),
					       info);
  info->preedit_set = g_signal_connect_swapped (info->settings,
						"notify::gtk-im-preedit-style",
						G_CALLBACK (preedit_style_change),
						info);

284 285
  status_style_change (info);
  preedit_style_change (info);
286 287

#if 0
288 289 290 291 292 293 294
  if (ic_values)
    {
      for (i = 0; i < ic_values->count_values; i++)
	g_print ("%s\n", ic_values->supported_values[i]);
      for (i = 0; i < xim_styles->count_styles; i++)
	g_print ("%#x\n", xim_styles->supported_styles[i]);
    }
295 296
#endif

297 298
  if (ic_values)
    XFree (ic_values);
299 300
}

301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323
static void
xim_info_display_closed (GdkDisplay *display,
			 gboolean    is_error,
			 GtkXIMInfo *info)
{
  GSList *ics, *tmp_list;

  open_ims = g_slist_remove (open_ims, info);

  ics = info->ics;
  info->ics = NULL;

  for (tmp_list = ics; tmp_list; tmp_list = tmp_list->next)
    set_ic_client_window (tmp_list->data, NULL, TRUE);

  g_slist_free (tmp_list);
  
  g_signal_handler_disconnect (info->settings, info->status_set);
  g_signal_handler_disconnect (info->settings, info->preedit_set);
  
  XFree (info->xim_styles->supported_styles);
  XFree (info->xim_styles);
  g_free (info->locale);
324 325 326

  if (info->im)
    XCloseIM (info->im);
327 328 329 330

  g_free (info);
}

331
static GtkXIMInfo *
332
get_im (GdkWindow *client_window,
333
	const char *locale)
334
{
335
  GSList *tmp_list;
336 337
  GtkXIMInfo *info;
  XIM im = NULL;
338 339
  GdkScreen *screen = gdk_drawable_get_screen (client_window);
  GdkDisplay *display = gdk_screen_get_display (screen);
340

341
  tmp_list = open_ims;
342 343 344
  while (tmp_list)
    {
      info = tmp_list->data;
345
      if (info->screen == screen &&
346
	  strcmp (info->locale, locale) == 0)
347 348 349 350 351 352 353 354 355 356
	return info;

      tmp_list = tmp_list->next;
    }

  info = NULL;

  if (XSupportsLocale ())
    {
      if (!XSetLocaleModifiers (""))
357
	g_warning ("Unable to set locale modifiers with XSetLocaleModifiers()");
358
      
359
      im = XOpenIM (GDK_DISPLAY_XDISPLAY (display), NULL, NULL, NULL);
360
      
361 362 363
      if (!im)
	g_warning ("Unable to open XIM input method, falling back to XLookupString()");

364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381
      info = g_new (GtkXIMInfo, 1);
      open_ims = g_slist_prepend (open_ims, info);

      info->screen = screen;
      info->locale = g_strdup (locale);
      info->im = im;
      info->xim_styles = NULL;
      info->preedit_style_setting = 0;
      info->status_style_setting = 0;
      info->settings = NULL;
      info->preedit_set = 0;
      info->status_set = 0;
      info->ics = NULL;

      setup_im (info);

      g_signal_connect (display, "closed",
			G_CALLBACK (xim_info_display_closed), info);
382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
    }

  return info;
}

static void
gtk_im_context_xim_class_init (GtkIMContextXIMClass *class)
{
  GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
  GObjectClass *gobject_class = G_OBJECT_CLASS (class);

  parent_class = g_type_class_peek_parent (class);

  im_context_class->set_client_window = gtk_im_context_xim_set_client_window;
  im_context_class->filter_keypress = gtk_im_context_xim_filter_keypress;
  im_context_class->reset = gtk_im_context_xim_reset;
  im_context_class->get_preedit_string = gtk_im_context_xim_get_preedit_string;
399 400
  im_context_class->focus_in = gtk_im_context_xim_focus_in;
  im_context_class->focus_out = gtk_im_context_xim_focus_out;
401
  im_context_class->set_cursor_location = gtk_im_context_xim_set_cursor_location;
402
  im_context_class->set_use_preedit = gtk_im_context_xim_set_use_preedit;
403 404 405 406 407 408
  gobject_class->finalize = gtk_im_context_xim_finalize;
}

static void
gtk_im_context_xim_init (GtkIMContextXIM *im_context_xim)
{
409
  im_context_xim->use_preedit = TRUE;
410
  im_context_xim->filter_key_release = FALSE;
411
  im_context_xim->status_visible = FALSE;
412 413 414 415 416 417 418
}

static void
gtk_im_context_xim_finalize (GObject *obj)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (obj);

419
  set_ic_client_window (context_xim, NULL, FALSE);
420

421
  g_free (context_xim->locale);
422 423 424 425
  g_free (context_xim->mb_charset);
}

static void
426 427
reinitialize_ic (GtkIMContextXIM *context_xim,
		 gboolean         send_signal)
428 429 430 431
{
  if (context_xim->ic)
    {
      XDestroyIC (context_xim->ic);
432
      status_window_hide (context_xim);
433
      context_xim->ic = NULL;
434 435 436 437

      if (context_xim->preedit_length)
	{
	  context_xim->preedit_length = 0;
438 439
	  if (send_signal)
	    g_signal_emit_by_name (context_xim, "preedit_changed");
440
	}
441
    }
442 443
}

444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
static void
set_ic_client_window (GtkIMContextXIM *context_xim,
		      GdkWindow       *client_window,
		      gboolean         send_signal)
{
  reinitialize_ic (context_xim, send_signal);
  if (context_xim->client_window)
    {
      context_xim->im_info->ics = g_slist_remove (context_xim->im_info->ics, context_xim);
      context_xim->im_info = NULL;
    }
  
  context_xim->client_window = client_window;

  if (context_xim->client_window)
    {
      context_xim->im_info = get_im (context_xim->client_window, context_xim->locale);
      context_xim->im_info->ics = g_slist_prepend (context_xim->im_info->ics, context_xim);
    }
}

465 466 467 468 469
static void
gtk_im_context_xim_set_client_window (GtkIMContext          *context,
				      GdkWindow             *client_window)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
470

471
  set_ic_client_window (context_xim, client_window, TRUE);
472 473 474 475 476 477
}

GtkIMContext *
gtk_im_context_xim_new (void)
{
  GtkIMContextXIM *result;
478
  const gchar *charset;
479

480
  result = GTK_IM_CONTEXT_XIM (g_object_new (GTK_TYPE_IM_CONTEXT_XIM, NULL));
481

482
  result->locale = g_strdup (setlocale (LC_CTYPE, NULL));
483 484 485 486 487 488 489 490 491 492 493 494 495 496
  
  g_get_charset (&charset);
  result->mb_charset = g_strdup (charset);

  return GTK_IM_CONTEXT (result);
}

static char *
mb_to_utf8 (GtkIMContextXIM *context_xim,
	    const char      *str)
{
  GError *error = NULL;
  gchar *result;

497 498 499
  if (strcmp (context_xim->mb_charset, "UTF-8") == 0)
    result = g_strdup (str);
  else
500
    {
501 502 503 504 505 506 507 508
      result = g_convert (str, -1,
			  "UTF-8", context_xim->mb_charset,
			  NULL, NULL, &error);
      if (!result)
	{
	  g_warning ("Error converting text from IM to UTF-8: %s\n", error->message);
	  g_error_free (error);
	}
509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526
    }
  
  return result;
}

static gboolean
gtk_im_context_xim_filter_keypress (GtkIMContext *context,
				    GdkEventKey  *event)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
  XIC ic = gtk_im_context_xim_get_ic (context_xim);
  gchar static_buffer[256];
  gchar *buffer = static_buffer;
  gint buffer_size = sizeof(static_buffer) - 1;
  gint num_bytes = 0;
  KeySym keysym;
  Status status;
  gboolean result = FALSE;
527
  GdkWindow *root_window = gdk_screen_get_root_window (gdk_drawable_get_screen (event->window));
528 529 530

  XKeyPressedEvent xevent;

531
  if (event->type == GDK_KEY_RELEASE && !context_xim->filter_key_release)
532 533
    return FALSE;

Owen Taylor's avatar
Owen Taylor committed
534
  xevent.type = (event->type == GDK_KEY_PRESS) ? KeyPress : KeyRelease;
535 536 537 538
  xevent.serial = 0;		/* hope it doesn't matter */
  xevent.send_event = event->send_event;
  xevent.display = GDK_DRAWABLE_XDISPLAY (event->window);
  xevent.window = GDK_DRAWABLE_XID (event->window);
539
  xevent.root = GDK_DRAWABLE_XID (root_window);
540 541 542 543 544
  xevent.subwindow = xevent.window;
  xevent.time = event->time;
  xevent.x = xevent.x_root = 0;
  xevent.y = xevent.y_root = 0;
  xevent.state = event->state;
545
  xevent.keycode = event->hardware_keycode;
546 547 548 549 550 551
  xevent.same_screen = True;
  
  if (XFilterEvent ((XEvent *)&xevent, GDK_DRAWABLE_XID (context_xim->client_window)))
    return TRUE;
  
 again:
552 553 554 555 556 557 558
  if (ic)
    num_bytes = XmbLookupString (ic, &xevent, buffer, buffer_size, &keysym, &status);
  else
    {
      num_bytes = XLookupString (&xevent, buffer, buffer_size, &keysym, NULL);
      status = XLookupBoth;
    }
559 560 561 562

  if (status == XBufferOverflow)
    {
      buffer_size = num_bytes;
563 564
      if (buffer != static_buffer) 
	g_free (buffer);
565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581
      buffer = g_malloc (num_bytes + 1);
      goto again;
    }

  /* I don't know how we should properly handle XLookupKeysym or XLookupBoth
   * here ... do input methods actually change the keysym? we can't really
   * feed it back to accelerator processing at this point...
   */
  if (status == XLookupChars || status == XLookupBoth)
    {
      char *result_utf8;

      buffer[num_bytes] = '\0';

      result_utf8 = mb_to_utf8 (context_xim, buffer);
      if (result_utf8)
	{
582 583 584 585
	  if ((guchar)result_utf8[0] >= 0x20 &&
	      result_utf8[0] != 0x7f) /* Some IM have a nasty habit of converting
				       * control characters into strings
				       */
586
	    {
587
	      g_signal_emit_by_name (context, "commit", result_utf8);
588 589 590 591 592 593 594
	      result = TRUE;
	    }
	  
	  g_free (result_utf8);
	}
    }

595 596 597
  if (buffer != static_buffer) 
    g_free (buffer);

598
  return result;
599 600
}

601 602 603 604 605 606 607 608 609 610
static void
gtk_im_context_xim_focus_in (GtkIMContext *context)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
  XIC ic = gtk_im_context_xim_get_ic (context_xim);

  if (!ic)
    return;

  XSetICFocus (ic);
611 612 613

  status_window_show (context_xim);

614 615 616 617 618 619 620 621 622 623 624 625 626
  return;
}

static void
gtk_im_context_xim_focus_out (GtkIMContext *context)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
  XIC ic = gtk_im_context_xim_get_ic (context_xim);

  if (!ic)
    return;

  XUnsetICFocus (ic);
627 628 629

  status_window_hide (context_xim);

630 631 632
  return;
}

633
static void
634 635
gtk_im_context_xim_set_cursor_location (GtkIMContext *context,
					GdkRectangle *area)
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
  XIC ic = gtk_im_context_xim_get_ic (context_xim);

  XVaNestedList preedit_attr;
  XPoint          spot;

  if (!ic)
    return;

  spot.x = area->x;
  spot.y = area->y;

  preedit_attr = XVaCreateNestedList (0,
				      XNSpotLocation, &spot,
				      0);
  XSetICValues (ic,
		XNPreeditAttributes, preedit_attr,
		NULL);
  XFree(preedit_attr);

  return;
}

660 661 662 663 664 665 666 667 668 669 670
static void
gtk_im_context_xim_set_use_preedit (GtkIMContext *context,
				    gboolean      use_preedit)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);

  use_preedit = use_preedit != FALSE;

  if (context_xim->use_preedit != use_preedit)
    {
      context_xim->use_preedit = use_preedit;
671
      reinitialize_ic (context_xim, TRUE);
672 673 674 675 676
    }

  return;
}

677 678 679 680 681 682 683
static void
gtk_im_context_xim_reset (GtkIMContext *context)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
  XIC ic = gtk_im_context_xim_get_ic (context_xim);
  gchar *result;

684 685 686 687 688
  /* restore conversion state after resetting ic later */
  XIMPreeditState preedit_state = XIMPreeditUnKnown;
  XVaNestedList preedit_attr;
  gboolean have_preedit_state = FALSE;

689 690 691
  if (!ic)
    return;
  
692

693 694 695
  if (context_xim->preedit_length == 0)
    return;

696 697 698 699 700 701 702 703 704 705
  preedit_attr = XVaCreateNestedList(0,
                                     XNPreeditState, &preedit_state,
                                     0);
  if (!XGetICValues(ic,
                    XNPreeditAttributes, preedit_attr,
                    NULL))
    have_preedit_state = TRUE;

  XFree(preedit_attr);

706 707
  result = XmbResetIC (ic);

708 709 710 711 712 713 714 715 716 717
  preedit_attr = XVaCreateNestedList(0,
                                     XNPreeditState, preedit_state,
                                     0);
  if (have_preedit_state)
    XSetICValues(ic,
		 XNPreeditAttributes, preedit_attr,
		 NULL);

  XFree(preedit_attr);

718 719 720 721 722
  if (result)
    {
      char *result_utf8 = mb_to_utf8 (context_xim, result);
      if (result_utf8)
	{
723
	  g_signal_emit_by_name (context, "commit", result_utf8);
724 725 726 727 728 729 730
	  g_free (result_utf8);
	}
    }

  if (context_xim->preedit_length)
    {
      context_xim->preedit_length = 0;
731
      g_signal_emit_by_name (context, "preedit_changed");
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787
    }

  XFree (result);
}

/* Mask of feedback bits that we render
 */
#define FEEDBACK_MASK (XIMReverse | XIMUnderline)

static void
add_feedback_attr (PangoAttrList *attrs,
		   const gchar   *str,
		   XIMFeedback    feedback,
		   gint           start_pos,
		   gint           end_pos)
{
  PangoAttribute *attr;
  
  gint start_index = g_utf8_offset_to_pointer (str, start_pos) - str;
  gint end_index = g_utf8_offset_to_pointer (str, end_pos) - str;

  if (feedback & XIMUnderline)
    {
      attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
      attr->start_index = start_index;
      attr->end_index = end_index;

      pango_attr_list_change (attrs, attr);
    }

  if (feedback & XIMReverse)
    {
      attr = pango_attr_foreground_new (0xffff, 0xffff, 0xffff);
      attr->start_index = start_index;
      attr->end_index = end_index;

      pango_attr_list_change (attrs, attr);

      attr = pango_attr_background_new (0, 0, 0);
      attr->start_index = start_index;
      attr->end_index = end_index;

      pango_attr_list_change (attrs, attr);
    }

  if (feedback & ~FEEDBACK_MASK)
    g_warning ("Unrendered feedback style: %#lx", feedback & ~FEEDBACK_MASK);
}

static void     
gtk_im_context_xim_get_preedit_string (GtkIMContext   *context,
				       gchar         **str,
				       PangoAttrList **attrs,
				       gint           *cursor_pos)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
788
  gchar *utf8 = g_ucs4_to_utf8 (context_xim->preedit_chars, context_xim->preedit_length, NULL, NULL, NULL);
789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830

  if (attrs)
    {
      int i;
      XIMFeedback last_feedback = 0;
      gint start = -1;
      
      *attrs = pango_attr_list_new ();

      for (i = 0; i < context_xim->preedit_length; i++)
	{
	  XIMFeedback new_feedback = context_xim->feedbacks[i] & FEEDBACK_MASK;
	  if (new_feedback != last_feedback)
	    {
	      if (start >= 0)
		add_feedback_attr (*attrs, utf8, last_feedback, start, i);
	      
	      last_feedback = new_feedback;
	      start = i;
	    }
	}

      if (start >= 0)
	add_feedback_attr (*attrs, utf8, last_feedback, start, i);
    }

  if (str)
    *str = utf8;
  else
    g_free (utf8);

  if (cursor_pos)
    *cursor_pos = context_xim->preedit_cursor;
}

static void
preedit_start_callback (XIC      xic,
			XPointer client_data,
			XPointer call_data)
{
  GtkIMContext *context = GTK_IM_CONTEXT (client_data);
  
831
  g_signal_emit_by_name (context, "preedit_start");
832 833 834 835 836 837 838 839 840
}		     

static void
preedit_done_callback (XIC      xic,
		     XPointer client_data,
		     XPointer call_data)
{
  GtkIMContext *context = GTK_IM_CONTEXT (client_data);
  
841
  g_signal_emit_by_name (context, "preedit_end");  
842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
}		     

static gint
xim_text_to_utf8 (GtkIMContextXIM *context, XIMText *xim_text, gchar **text)
{
  gint text_length = 0;
  GError *error = NULL;
  gchar *result = NULL;

  if (xim_text && xim_text->string.multi_byte)
    {
      if (xim_text->encoding_is_wchar)
	{
	  g_warning ("Wide character return from Xlib not currently supported");
	  *text = NULL;
	  return 0;
	}

860 861 862 863 864 865 866 867
      if (strcmp (context->mb_charset, "UTF-8") == 0)
	result = g_strdup (xim_text->string.multi_byte);
      else
	result = g_convert (xim_text->string.multi_byte,
			    -1,
			    "UTF-8",
			    context->mb_charset,
			    NULL, NULL, &error);
868 869 870 871 872 873 874 875 876 877 878 879 880 881
      
      if (result)
	{
	  text_length = g_utf8_strlen (result, -1);
	  
	  if (text_length != xim_text->length)
	    {
	      g_warning ("Size mismatch when converting text from input method: supplied length = %d\n, result length = %d", xim_text->length, text_length);
	    }
	}
      else
	{
	  g_warning ("Error converting text from IM to UCS-4: %s", error->message);
	  g_error_free (error);
882 883 884

	  *text = NULL;
	  return 0;
885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923
	}

      *text = result;
      return text_length;
    }
  else
    {
      *text = NULL;
      return 0;
    }
}

static void
preedit_draw_callback (XIC                           xic, 
		       XPointer                      client_data,
		       XIMPreeditDrawCallbackStruct *call_data)
{
  GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data);

  XIMText *new_xim_text = call_data->text;
  gint new_text_length;
  gunichar *new_text = NULL;
  gint i;
  gint diff;
  gint new_length;
  gchar *tmp;
  
  gint chg_first = CLAMP (call_data->chg_first, 0, context->preedit_length);
  gint chg_length = CLAMP (call_data->chg_length, 0, context->preedit_length - chg_first);

  context->preedit_cursor = call_data->caret;
  
  if (chg_first != call_data->chg_first || chg_length != call_data->chg_length)
    g_warning ("Invalid change to preedit string, first=%d length=%d (orig length == %d)",
	       call_data->chg_first, call_data->chg_length, context->preedit_length);

  new_text_length = xim_text_to_utf8 (context, new_xim_text, &tmp);
  if (tmp)
    {
924
      new_text = g_utf8_to_ucs4_fast (tmp, -1, NULL);
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
      g_free (tmp);
    }
  
  diff = new_text_length - chg_length;
  new_length = context->preedit_length + diff;

  if (new_length > context->preedit_size)
    {
      context->preedit_size = new_length;
      context->preedit_chars = g_renew (gunichar, context->preedit_chars, new_length);
      context->feedbacks = g_renew (XIMFeedback, context->feedbacks, new_length);
    }

  if (diff < 0)
    {
      for (i = chg_first + chg_length ; i < context->preedit_length; i++)
	{
	  context->preedit_chars[i + diff] = context->preedit_chars[i];
	  context->feedbacks[i + diff] = context->feedbacks[i];
	}
    }
  else
    {
      for (i = context->preedit_length - 1; i >= chg_first + chg_length ; i--)
	{
	  context->preedit_chars[i + diff] = context->preedit_chars[i];
	  context->feedbacks[i + diff] = context->feedbacks[i];
	}
    }

  for (i = 0; i < new_text_length; i++)
    {
      context->preedit_chars[chg_first + i] = new_text[i];
      context->feedbacks[chg_first + i] = new_xim_text->feedback[i];
    }

  context->preedit_length += diff;

  if (new_text)
    g_free (new_text);

966
  g_signal_emit_by_name (context, "preedit_changed");
967 968 969 970 971 972 973 974 975 976 977 978 979
}
    

static void
preedit_caret_callback (XIC                            xic,
			XPointer                       client_data,
			XIMPreeditCaretCallbackStruct *call_data)
{
  GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data);
  
  if (call_data->direction == XIMAbsolutePosition)
    {
      context->preedit_cursor = call_data->position;
980
      g_signal_emit_by_name (context, "preedit_changed");
981 982 983 984 985 986 987 988 989 990 991 992 993
    }
  else
    {
      g_warning ("Caret movement command: %d %d %d not supported",
		 call_data->position, call_data->direction, call_data->style);
    }
}	     

static void
status_start_callback (XIC      xic,
		       XPointer client_data,
		       XPointer call_data)
{
994
  return;
995 996 997 998 999 1000 1001
} 

static void
status_done_callback (XIC      xic,
		      XPointer client_data,
		      XPointer call_data)
{
1002
  return;
1003 1004 1005 1006 1007 1008 1009 1010 1011
}

static void
status_draw_callback (XIC      xic,
		      XPointer client_data,
		      XIMStatusDrawCallbackStruct *call_data)
{
  GtkIMContextXIM *context = GTK_IM_CONTEXT_XIM (client_data);

1012 1013 1014
  if (context->status_visible == FALSE)
    return;

1015 1016 1017 1018 1019 1020
  if (call_data->type == XIMTextType)
    {
      gchar *text;
      xim_text_to_utf8 (context, call_data->data.text, &text);

      if (text)
1021 1022 1023
	status_window_set_text (context, text);
      else
	status_window_set_text (context, "");
1024 1025 1026
    }
  else				/* bitmap */
    {
1027
      g_print ("Status drawn with bitmap - id = %#lx\n", call_data->data.bitmap);
1028 1029 1030
    }
}

1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
static XVaNestedList
set_preedit_callback (GtkIMContextXIM *context_xim)
{
  context_xim->preedit_start_callback.client_data = (XPointer)context_xim;
  context_xim->preedit_start_callback.callback = (XIMProc)preedit_start_callback;
  context_xim->preedit_done_callback.client_data = (XPointer)context_xim;
  context_xim->preedit_done_callback.callback = (XIMProc)preedit_done_callback;
  context_xim->preedit_draw_callback.client_data = (XPointer)context_xim;
  context_xim->preedit_draw_callback.callback = (XIMProc)preedit_draw_callback;
  context_xim->preedit_caret_callback.client_data = (XPointer)context_xim;
  context_xim->preedit_caret_callback.callback = (XIMProc)preedit_caret_callback;
  return XVaCreateNestedList (0,
			      XNPreeditStartCallback, &context_xim->preedit_start_callback,
			      XNPreeditDoneCallback, &context_xim->preedit_done_callback,
			      XNPreeditDrawCallback, &context_xim->preedit_draw_callback,
			      XNPreeditCaretCallback, &context_xim->preedit_caret_callback,
			      NULL);
}

static XVaNestedList
set_status_callback (GtkIMContextXIM *context_xim)
{
  context_xim->status_start_callback.client_data = (XPointer)context_xim;
  context_xim->status_start_callback.callback = (XIMProc)status_start_callback;
  context_xim->status_done_callback.client_data = (XPointer)context_xim;
  context_xim->status_done_callback.callback = (XIMProc)status_done_callback;
  context_xim->status_draw_callback.client_data = (XPointer)context_xim;
  context_xim->status_draw_callback.callback = (XIMProc)status_draw_callback;
	  
  return XVaCreateNestedList (0,
			      XNStatusStartCallback, &context_xim->status_start_callback,
			      XNStatusDoneCallback, &context_xim->status_done_callback,
			      XNStatusDrawCallback, &context_xim->status_draw_callback,
			      NULL);
}

1067
static XIC
1068
get_ic_real (GtkIMContextXIM *context_xim)
1069
{
1070
  XIC xic = 0;
1071
  const char *name1 = NULL;
1072
  XVaNestedList list1 = NULL;
1073
  const char *name2 = NULL;
1074
  XVaNestedList list2 = NULL;
1075
  XIMStyle im_style = 0;
1076

1077 1078 1079
  if (context_xim->im_info->im == NULL)
    return (XIC)0;

1080 1081
  if (context_xim->use_preedit &&
      (context_xim->im_info->style & PREEDIT_MASK) == XIMPreeditCallbacks)
1082
    {
1083
      im_style |= XIMPreeditCallbacks;
1084
      name1 = XNPreeditAttributes;
1085
      list1 = set_preedit_callback (context_xim);
1086
    }
1087 1088
  else
    im_style |= XIMPreeditNothing;
1089 1090 1091

  if ((context_xim->im_info->style & STATUS_MASK) == XIMStatusCallbacks)
    {
1092
      im_style |= XIMStatusCallbacks;
1093
      if (name1 == NULL)
1094
	{
1095
	  name1 = XNStatusAttributes;
1096
	  list1 = set_status_callback (context_xim);
1097
	}
1098
      else
1099
	{
1100
	  name2 = XNStatusAttributes;
1101
	  list2 = set_status_callback (context_xim);
1102
	}
1103
    }
1104 1105
  else
    im_style |= XIMStatusNothing;
1106

1107
  xic = XCreateIC (context_xim->im_info->im,
1108
		   XNInputStyle, im_style,
1109 1110 1111 1112 1113 1114 1115 1116 1117
		   XNClientWindow, GDK_DRAWABLE_XID (context_xim->client_window),
		   name1, list1,
		   name2, list2,
		   NULL);
  if (list1)
    XFree (list1);
  if (list2)
    XFree (list2);

1118 1119 1120 1121 1122 1123 1124 1125 1126
  if (xic)
    {
      /* Don't filter key released events with XFilterEvents unless
       * input methods ask for. This is a workaround for Solaris input
       * method bug in C and European locales. It doubles each key
       * stroke if both key pressed and released events are filtered.
       * (bugzilla #81759)
       */
      gulong mask = 0;
1127
      XGetICValues (xic,
1128
		    XNFilterEvents, &mask,
1129
		    NULL);
1130 1131 1132 1133
      context_xim->filter_key_release = (mask & KeyReleaseMask);
    }

  return xic;
1134 1135 1136 1137 1138 1139
}

static XIC
gtk_im_context_xim_get_ic (GtkIMContextXIM *context_xim)
{
  if (!context_xim->ic && context_xim->im_info)
1140 1141
    context_xim->ic = get_ic_real (context_xim);
  
1142 1143
  return context_xim->ic;
}
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179

/**************************
 *                        *
 * Status Window handling *
 *                        *
 **************************/

static gboolean
status_window_expose_event (GtkWidget      *widget,
			    GdkEventExpose *event)
{
  gdk_draw_rectangle (widget->window,
		      widget->style->base_gc [GTK_STATE_NORMAL],
		      TRUE,
		      0, 0,
		      widget->allocation.width, widget->allocation.height);
  gdk_draw_rectangle (widget->window,
		      widget->style->text_gc [GTK_STATE_NORMAL],
		      FALSE,
		      0, 0,
		      widget->allocation.width - 1, widget->allocation.height - 1);

  return FALSE;
}

static void
status_window_style_set (GtkWidget *toplevel,
			 GtkStyle  *previous_style,
			 GtkWidget *label)
{
  gint i;
  
  for (i = 0; i < 5; i++)
    gtk_widget_modify_fg (label, i, &toplevel->style->text[i]);
}

1180
/* Frees a status window and removes its link from the status_windows list */
1181
static void
1182
status_window_free (StatusWindow *status_window)
1183
{
1184 1185 1186 1187 1188 1189 1190 1191
  status_windows = g_slist_remove (status_windows, status_window);
 
  g_signal_handler_disconnect (status_window->toplevel, status_window->destroy_handler_id);
  g_signal_handler_disconnect (status_window->toplevel, status_window->configure_handler_id);
  gtk_widget_destroy (status_window->window);
  g_object_set_data (G_OBJECT (status_window->toplevel), "gtk-im-xim-status-window", NULL);
 
  g_free (status_window);
1192 1193 1194 1195 1196
}

static gboolean
status_window_configure (GtkWidget         *toplevel,
			 GdkEventConfigure *event,
1197
  			 StatusWindow      *status_window)
1198 1199 1200 1201
{
  GdkRectangle rect;
  GtkRequisition requisition;
  gint y;
1202 1203
  gint height = gdk_screen_get_height (gtk_widget_get_screen (toplevel));
  
1204
  gdk_window_get_frame_extents (toplevel->window, &rect);
1205
  gtk_widget_size_request (status_window->window, &requisition);
1206

1207
  if (rect.y + rect.height + requisition.height < height)
1208 1209
    y = rect.y + rect.height;
  else
1210
    y = height - requisition.height;
1211
  
1212
  gtk_window_move (GTK_WINDOW (status_window->window), rect.x, y);
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222

  return FALSE;
}

static GtkWidget *
status_window_get (GtkIMContextXIM *context_xim,
		   gboolean         create)
{
  GdkWindow *toplevel_gdk;
  GtkWidget *toplevel;
1223 1224
  GtkWidget *window;
  StatusWindow *status_window;
1225
  GtkWidget *status_label;