gtkimcontextxim.c 31.2 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/gtklabel.h"
24
#include "gtk/gtksignal.h"
25
#include "gtk/gtkwindow.h"
26 27
#include "gtkimcontextxim.h"

28 29
typedef struct _StatusWindow StatusWindow;

30 31
struct _GtkXIMInfo
{
32
  GdkDisplay *display;
33 34 35 36 37
  XIM im;
  char *locale;
  XIMStyle style;
};

38 39 40 41 42 43 44 45 46
/* 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 */
47 48
  gulong destroy_handler_id;
  gulong configure_handler_id;
49 50
};

51 52 53 54 55 56 57 58
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);
59 60
static void     gtk_im_context_xim_focus_in           (GtkIMContext          *context);
static void     gtk_im_context_xim_focus_out          (GtkIMContext          *context);
61
static void     gtk_im_context_xim_set_cursor_location (GtkIMContext          *context,
62
						       GdkRectangle		*area);
63 64
static void     gtk_im_context_xim_set_use_preedit    (GtkIMContext          *context,
						       gboolean		      use_preedit);
65 66 67 68 69
static void     gtk_im_context_xim_get_preedit_string (GtkIMContext          *context,
						       gchar                **str,
						       PangoAttrList        **attrs,
						       gint                  *cursor_pos);

70 71 72 73 74
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);

75 76 77 78 79
static XIC       gtk_im_context_xim_get_ic            (GtkIMContextXIM *context_xim);
static GObjectClass *parent_class;

GType gtk_type_im_context_xim = 0;

80
GSList *open_ims = NULL;
81

82 83 84
/* List of status windows for different toplevels */
static GSList *status_windows = NULL;

85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
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,
    (GtkObjectInitFunc) gtk_im_context_xim_init,
  };

  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 */
}

static void
setup_im (GtkXIMInfo *info)
{
157 158
  XIMStyles *xim_styles = NULL;
  XIMValuesList *ic_values = NULL;
159 160 161 162
  int i;
  
  XGetIMValues (info->im,
		XNQueryInputStyle, &xim_styles,
163 164
		XNQueryICValuesList, &ic_values,
		NULL);
165 166

  info->style = 0;
167 168 169 170 171 172 173 174
  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])
	  info->style = choose_better_style (info->style,
					     xim_styles->supported_styles[i]);
    }

175 176

#if 0
177 178 179 180 181 182 183
  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]);
    }
184 185
#endif

186 187 188 189
  if (xim_styles)
    XFree (xim_styles);
  if (ic_values)
    XFree (ic_values);
190 191 192
}

static GtkXIMInfo *
193 194
get_im (GdkDisplay *display,
	const char *locale)
195
{
196
  GSList *tmp_list;
197 198 199
  GtkXIMInfo *info;
  XIM im = NULL;

200
  tmp_list = open_ims;
201 202 203
  while (tmp_list)
    {
      info = tmp_list->data;
204 205
      if (info->display == display &&
	  strcmp (info->locale, locale) == 0)
206 207 208 209 210 211 212 213 214 215
	return info;

      tmp_list = tmp_list->next;
    }

  info = NULL;

  if (XSupportsLocale ())
    {
      if (!XSetLocaleModifiers (""))
216
	g_warning ("Unable to set locale modifiers with XSetLocaleModifiers()");
217
      
218
      im = XOpenIM (GDK_DISPLAY_XDISPLAY (display), NULL, NULL, NULL);
219
      
220 221 222
      if (!im)
	g_warning ("Unable to open XIM input method, falling back to XLookupString()");

223 224 225 226
      if (im)
	{
	  info = g_new (GtkXIMInfo, 1);
	  open_ims = g_slist_prepend (open_ims, im);
227 228

	  info->display = display;
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
	  info->locale = g_strdup (locale);
	  info->im = im;

	  setup_im (info);
	}
    }

  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;
251 252
  im_context_class->focus_in = gtk_im_context_xim_focus_in;
  im_context_class->focus_out = gtk_im_context_xim_focus_out;
253
  im_context_class->set_cursor_location = gtk_im_context_xim_set_cursor_location;
254
  im_context_class->set_use_preedit = gtk_im_context_xim_set_use_preedit;
255 256 257 258 259 260
  gobject_class->finalize = gtk_im_context_xim_finalize;
}

static void
gtk_im_context_xim_init (GtkIMContextXIM *im_context_xim)
{
261
  im_context_xim->use_preedit = TRUE;
262
  im_context_xim->filter_key_release = FALSE;
263 264 265 266 267 268 269 270 271 272 273 274 275
}

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

  if (context_xim->ic)
    {
      XDestroyIC (context_xim->ic);
      context_xim->ic = NULL;
    }
 
276
  g_free (context_xim->locale);
277 278 279 280
  g_free (context_xim->mb_charset);
}

static void
281
reinitialize_ic (GtkIMContextXIM *context_xim)
282 283 284 285 286
{
  if (context_xim->ic)
    {
      XDestroyIC (context_xim->ic);
      context_xim->ic = NULL;
287 288 289 290 291 292

      if (context_xim->preedit_length)
	{
	  context_xim->preedit_length = 0;
	  g_signal_emit_by_name (context_xim, "preedit_changed");
	}
293
    }
294 295 296 297 298 299 300
}

static void
gtk_im_context_xim_set_client_window (GtkIMContext          *context,
				      GdkWindow             *client_window)
{
  GtkIMContextXIM *context_xim = GTK_IM_CONTEXT_XIM (context);
301

302
  reinitialize_ic (context_xim);
303
  context_xim->client_window = client_window;
304 305 306 307 308

  if (context_xim->client_window)
    context_xim->im_info = get_im (gdk_drawable_get_display (context_xim->client_window), context_xim->locale);
  else
    context_xim->im_info = NULL;
309 310 311 312 313 314
}

GtkIMContext *
gtk_im_context_xim_new (void)
{
  GtkIMContextXIM *result;
315
  const gchar *charset;
316

317
  result = GTK_IM_CONTEXT_XIM (g_object_new (GTK_TYPE_IM_CONTEXT_XIM, NULL));
318

319
  result->locale = g_strdup (setlocale (LC_CTYPE, NULL));
320 321 322 323 324 325 326 327 328 329 330 331 332 333
  
  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;

334 335 336
  if (strcmp (context_xim->mb_charset, "UTF-8") == 0)
    result = g_strdup (str);
  else
337
    {
338 339 340 341 342 343 344 345
      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);
	}
346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363
    }
  
  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;
364
  GdkWindow *root_window = gdk_screen_get_root_window (gdk_drawable_get_screen (event->window));
365 366 367

  XKeyPressedEvent xevent;

368
  if (event->type == GDK_KEY_RELEASE && !context_xim->filter_key_release)
369 370
    return FALSE;

371
  xevent.type = (event->type == GDK_KEY_PRESS) ? KeyPress : KeyRelease;
372 373 374 375
  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);
376
  xevent.root = GDK_DRAWABLE_XID (root_window);
377 378 379 380 381
  xevent.subwindow = xevent.window;
  xevent.time = event->time;
  xevent.x = xevent.x_root = 0;
  xevent.y = xevent.y_root = 0;
  xevent.state = event->state;
382
  xevent.keycode = event->hardware_keycode;
383 384 385 386 387 388
  xevent.same_screen = True;
  
  if (XFilterEvent ((XEvent *)&xevent, GDK_DRAWABLE_XID (context_xim->client_window)))
    return TRUE;
  
 again:
389 390 391 392 393 394 395
  if (ic)
    num_bytes = XmbLookupString (ic, &xevent, buffer, buffer_size, &keysym, &status);
  else
    {
      num_bytes = XLookupString (&xevent, buffer, buffer_size, &keysym, NULL);
      status = XLookupBoth;
    }
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416

  if (status == XBufferOverflow)
    {
      buffer_size = num_bytes;
      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)
	{
417 418 419 420
	  if ((guchar)result_utf8[0] >= 0x20 &&
	      result_utf8[0] != 0x7f) /* Some IM have a nasty habit of converting
				       * control characters into strings
				       */
421
	    {
422
	      g_signal_emit_by_name (context, "commit", result_utf8);
423 424 425 426 427 428 429
	      result = TRUE;
	    }
	  
	  g_free (result_utf8);
	}
    }

430
  return result;
431 432
}

433 434 435 436 437 438 439 440 441 442
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);
443 444 445

  status_window_show (context_xim);

446 447 448 449 450 451 452 453 454 455 456 457 458
  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);
459 460 461

  status_window_hide (context_xim);

462 463 464
  return;
}

465
static void
466 467
gtk_im_context_xim_set_cursor_location (GtkIMContext *context,
					GdkRectangle *area)
468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491
{
  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;
}

492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508
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;
      reinitialize_ic (context_xim);
    }

  return;
}

509 510 511 512 513 514 515
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;

516 517 518 519 520
  /* restore conversion state after resetting ic later */
  XIMPreeditState preedit_state = XIMPreeditUnKnown;
  XVaNestedList preedit_attr;
  gboolean have_preedit_state = FALSE;

521 522 523
  if (!ic)
    return;
  
524

525 526 527
  if (context_xim->preedit_length == 0)
    return;

528 529 530 531 532 533 534 535 536 537
  preedit_attr = XVaCreateNestedList(0,
                                     XNPreeditState, &preedit_state,
                                     0);
  if (!XGetICValues(ic,
                    XNPreeditAttributes, preedit_attr,
                    NULL))
    have_preedit_state = TRUE;

  XFree(preedit_attr);

538 539
  result = XmbResetIC (ic);

540 541 542 543 544 545 546 547 548 549
  preedit_attr = XVaCreateNestedList(0,
                                     XNPreeditState, preedit_state,
                                     0);
  if (have_preedit_state)
    XSetICValues(ic,
		 XNPreeditAttributes, preedit_attr,
		 NULL);

  XFree(preedit_attr);

550 551 552 553 554
  if (result)
    {
      char *result_utf8 = mb_to_utf8 (context_xim, result);
      if (result_utf8)
	{
555
	  g_signal_emit_by_name (context, "commit", result_utf8);
556 557 558 559 560 561 562
	  g_free (result_utf8);
	}
    }

  if (context_xim->preedit_length)
    {
      context_xim->preedit_length = 0;
563
      g_signal_emit_by_name (context, "preedit_changed");
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
    }

  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);
620
  gchar *utf8 = g_ucs4_to_utf8 (context_xim->preedit_chars, context_xim->preedit_length, NULL, NULL, NULL);
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662

  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);
  
663
  g_signal_emit_by_name (context, "preedit_start");
664 665 666 667 668 669 670 671 672
}		     

static void
preedit_done_callback (XIC      xic,
		     XPointer client_data,
		     XPointer call_data)
{
  GtkIMContext *context = GTK_IM_CONTEXT (client_data);
  
673
  g_signal_emit_by_name (context, "preedit_end");  
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691
}		     

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;
	}

692 693 694 695 696 697 698 699
      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);
700 701 702 703 704 705 706 707 708 709 710 711 712 713
      
      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);
714 715 716

	  *text = NULL;
	  return 0;
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
	}

      *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)
    {
756
      new_text = g_utf8_to_ucs4_fast (tmp, -1, NULL);
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797
      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);

798
  g_signal_emit_by_name (context, "preedit_changed");
799 800 801 802 803 804 805 806 807 808 809 810 811
}
    

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;
812
      g_signal_emit_by_name (context, "preedit_changed");
813 814 815 816 817 818 819 820 821 822 823 824 825
    }
  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)
{
826
  return;
827 828 829 830 831 832 833
} 

static void
status_done_callback (XIC      xic,
		      XPointer client_data,
		      XPointer call_data)
{
834
  return;
835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
}

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

  if (call_data->type == XIMTextType)
    {
      gchar *text;
      xim_text_to_utf8 (context, call_data->data.text, &text);

      if (text)
850 851 852
	status_window_set_text (context, text);
      else
	status_window_set_text (context, "");
853 854 855
    }
  else				/* bitmap */
    {
856
      g_print ("Status drawn with bitmap - id = %#lx\n", call_data->data.bitmap);
857 858 859 860
    }
}

static XIC
861
get_ic_with_preedit (GtkIMContextXIM *context_xim)
862
{
863
  XIC xic = 0;
864
  const char *name1 = NULL;
865
  XVaNestedList list1 = NULL;
866
  const char *name2 = NULL;
867
  XVaNestedList list2 = NULL;
868

869
  if ((context_xim->im_info->style & PREEDIT_MASK) == XIMPreeditCallbacks)
870
    {
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
      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;
      name1 = XNPreeditAttributes;
      list1 = 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);
    }

  if ((context_xim->im_info->style & STATUS_MASK) == XIMStatusCallbacks)
    {
      XVaNestedList status_attrs;

      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;
	  
      status_attrs = XVaCreateNestedList (0,
					  XNStatusStartCallback, &context_xim->status_start_callback,
					  XNStatusDoneCallback, &context_xim->status_done_callback,
					  XNStatusDrawCallback, &context_xim->status_draw_callback,
					  NULL);
      if (name1 == NULL)
905
	{
906 907
	  name1 = XNStatusAttributes;
	  list1 = status_attrs;
908
	}
909
      else
910
	{
911 912
	  name2 = XNStatusAttributes;
	  list2 = status_attrs;
913
	}
914
    }
915

916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
  xic = XCreateIC (context_xim->im_info->im,
		   XNInputStyle, context_xim->im_info->style,
		   XNClientWindow, GDK_DRAWABLE_XID (context_xim->client_window),
		   name1, list1,
		   name2, list2,
		   NULL);
  if (list1)
    XFree (list1);
  if (list2)
    XFree (list2);
  
  return xic;
}

static XIC
get_ic_without_preedit (GtkIMContextXIM *context_xim)
{
  return XCreateIC (context_xim->im_info->im,
		    XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
		    XNClientWindow, GDK_DRAWABLE_XID (context_xim->client_window),
		    NULL);
}

static XIC
gtk_im_context_xim_get_ic (GtkIMContextXIM *context_xim)
{
  if (!context_xim->ic && context_xim->im_info)
    {
      if (!context_xim->use_preedit)
	context_xim->ic = get_ic_without_preedit (context_xim);
      else
	context_xim->ic = get_ic_with_preedit (context_xim);

      if (context_xim->ic)
950
	{
951 952 953 954 955 956 957 958 959 960 961
	  /* 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;
	  XGetICValues (context_xim->ic,
			XNFilterEvents, &mask,
			NULL);
	  context_xim->filter_key_release = (mask & KeyReleaseMask);
962 963 964 965
	}
    }
  return context_xim->ic;
}
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001

/**************************
 *                        *
 * 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]);
}

1002
/* Frees a status window and removes its link from the status_windows list */
1003
static void
1004
status_window_free (StatusWindow *status_window)
1005
{
1006 1007 1008 1009 1010 1011 1012 1013
  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);
1014 1015 1016 1017 1018
}

static gboolean
status_window_configure (GtkWidget         *toplevel,
			 GdkEventConfigure *event,
1019
  			 StatusWindow      *status_window)
1020 1021 1022 1023
{
  GdkRectangle rect;
  GtkRequisition requisition;
  gint y;
1024 1025
  gint height = gdk_screen_get_height (gtk_widget_get_screen (toplevel));
  
1026
  gdk_window_get_frame_extents (toplevel->window, &rect);
1027
  gtk_widget_size_request (status_window->window, &requisition);
1028

1029
  if (rect.y + rect.height + requisition.height < height)
1030 1031
    y = rect.y + rect.height;
  else
1032
    y = height - requisition.height;
1033
  
1034
  gtk_window_move (GTK_WINDOW (status_window->window), rect.x, y);
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044

  return FALSE;
}

static GtkWidget *
status_window_get (GtkIMContextXIM *context_xim,
		   gboolean         create)
{
  GdkWindow *toplevel_gdk;
  GtkWidget *toplevel;
1045 1046
  GtkWidget *window;
  StatusWindow *status_window;
1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
  GtkWidget *status_label;
  
  if (!context_xim->client_window)
    return NULL;

  toplevel_gdk = context_xim->client_window;
  while (TRUE)
    {
      GdkWindow *parent = gdk_window_get_parent (toplevel_gdk);
      if (parent == gdk_get_default_root_window ())
	break;
      else
	toplevel_gdk = parent;
    }

  gdk_window_get_user_data (toplevel_gdk, (gpointer *)&toplevel);
  if (!toplevel)
    return NULL;

  status_window = g_object_get_data (G_OBJECT (toplevel), "gtk-im-xim-status-window");
1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
  if (status_window)
    return status_window->window;
  else if (!create)
    return NULL;

  status_window = g_new (StatusWindow, 1);
  status_window->window = gtk_window_new (GTK_WINDOW_POPUP);
  status_window->toplevel = toplevel;

  status_windows = g_slist_prepend (status_windows, status_window);
1077

1078
  window = status_window->window;
1079

1080 1081
  gtk_window_set_policy (GTK_WINDOW (window), FALSE, FALSE, FALSE);
  gtk_widget_set_app_paintable (window, TRUE);
1082 1083 1084 1085 1086

  status_label = gtk_label_new ("");
  gtk_misc_set_padding (GTK_MISC (status_label), 1, 1);
  gtk_widget_show (status_label);
  
1087
  gtk_container_add (GTK_CONTAINER (window), status_label);
1088

1089 1090 1091 1092 1093 1094
  status_window->destroy_handler_id = g_signal_connect_swapped (toplevel, "destroy",
								G_CALLBACK (status_window_free),
								status_window);
  status_window->configure_handler_id = g_signal_connect (toplevel, "configure_event",
							  G_CALLBACK (status_window_configure),
							  status_window);
1095 1096

  status_window_configure (toplevel, NULL, status_window);
1097 1098

  g_signal_connect (window, "style_set",
1099
		    G_CALLBACK (status_window_style_set), status_label);
1100
  g_signal_connect (window, "expose_event",
1101
		    G_CALLBACK (status_window_expose_event), NULL);
1102

1103 1104
  g_object_set_data (G_OBJECT (toplevel), "gtk-im-xim-status-window", status_window);

1105
  return window;
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
}

static gboolean
status_window_has_text (GtkWidget *status_window)
{
  GtkWidget *label = GTK_BIN (status_window)->child;
  const gchar *text = gtk_label_get_text (GTK_LABEL (label));

  return text[0] != '\0';
}

static void
status_window_show (GtkIMContextXIM *context_xim)
{
  GtkWidget *status_window = status_window_get (context_xim, TRUE);

  context_xim->status_visible = TRUE;
  
  if (status_window && status_window_has_text (status_window))
    gtk_widget_show (status_window);
}

static void
status_window_hide (GtkIMContextXIM *context_xim)
{
  GtkWidget *status_window = status_window_get (context_xim, FALSE);

  context_xim->status_visible = FALSE;
  
  if (status_window)
    gtk_widget_hide (status_window);
}

static void
status_window_set_text (GtkIMContextXIM *context_xim,
			const gchar     *text)
{
  GtkWidget *status_window = status_window_get (context_xim, TRUE);

  if (status_window)
    {
      GtkWidget *label = GTK_BIN (status_window)->child;
      gtk_label_set_text (GTK_LABEL (label), text);
      
      if (context_xim->status_visible && status_window_has_text (status_window))
	gtk_widget_show (status_window);
      else
	gtk_widget_hide (status_window);
    }
}
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168

/**
 * gtk_im_context_xim_shutdown:
 * 
 * Destroys all the status windows that are kept by the XIM contexts.  This
 * function should only be called by the XIM module exit routine.
 **/
void
gtk_im_context_xim_shutdown (void)
{
  while (status_windows)
    status_window_free (status_windows->data);
}