obt/prop.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    obt/prop.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "obt/prop.h"
  21 #include "obt/display.h"
  22
  23 #include <X11/Xatom.h>
  24 #ifdef HAVE_STRING_H
  25 #  include <string.h>
  26 #endif
  27
  28 Atom prop_atoms[OBT_PROP_NUM_ATOMS];
  29 gboolean prop_started = FALSE;
  30
  31 #define CREATE_NAME(var, name) (prop_atoms[OBT_PROP_##var] = \
  32                                 XInternAtom((obt_display), (name), FALSE))
  33 #define CREATE(var) CREATE_NAME(var, #var)
  34 #define CREATE_(var) CREATE_NAME(var, "_" #var)
  35
  36 void obt_prop_startup(void)
  37 {
  38     if (prop_started) return;
  39     prop_started = TRUE;
  40
  41     g_assert(obt_display);
  42
  43     CREATE(CARDINAL);
  44     CREATE(WINDOW);
  45     CREATE(PIXMAP);
  46     CREATE(ATOM);
  47     CREATE(STRING);
  48     CREATE(COMPOUND_TEXT);
  49     CREATE(UTF8_STRING);
  50
  51     CREATE(MANAGER);
  52
  53     CREATE(WM_COLORMAP_WINDOWS);
  54     CREATE(WM_PROTOCOLS);
  55     CREATE(WM_STATE);
  56     CREATE(WM_CHANGE_STATE);
  57     CREATE(WM_DELETE_WINDOW);
  58     CREATE(WM_TAKE_FOCUS);
  59     CREATE(WM_NAME);
  60     CREATE(WM_ICON_NAME);
  61     CREATE(WM_CLASS);
  62     CREATE(WM_WINDOW_ROLE);
  63     CREATE(WM_CLIENT_MACHINE);
  64     CREATE(WM_COMMAND);
  65     CREATE(WM_CLIENT_LEADER);
  66     CREATE(WM_TRANSIENT_FOR);
  67     CREATE_(MOTIF_WM_HINTS);
  68     CREATE_(MOTIF_WM_INFO);
  69
  70     CREATE(SM_CLIENT_ID);
  71
  72     CREATE_(NET_WM_FULL_PLACEMENT);
  73
  74     CREATE_(NET_SUPPORTED);
  75     CREATE_(NET_CLIENT_LIST);
  76     CREATE_(NET_CLIENT_LIST_STACKING);
  77     CREATE_(NET_NUMBER_OF_DESKTOPS);
  78     CREATE_(NET_DESKTOP_GEOMETRY);
  79     CREATE_(NET_DESKTOP_VIEWPORT);
  80     CREATE_(NET_CURRENT_DESKTOP);
  81     CREATE_(NET_DESKTOP_NAMES);
  82     CREATE_(NET_ACTIVE_WINDOW);
  83 /*    CREATE_(NET_RESTACK_WINDOW);*/
  84     CREATE_(NET_WORKAREA);
  85     CREATE_(NET_SUPPORTING_WM_CHECK);
  86     CREATE_(NET_DESKTOP_LAYOUT);
  87     CREATE_(NET_SHOWING_DESKTOP);
  88
  89     CREATE_(NET_CLOSE_WINDOW);
  90     CREATE_(NET_WM_MOVERESIZE);
  91     CREATE_(NET_MOVERESIZE_WINDOW);
  92     CREATE_(NET_REQUEST_FRAME_EXTENTS);
  93     CREATE_(NET_RESTACK_WINDOW);
  94
  95     CREATE_(NET_STARTUP_ID);
  96
  97     CREATE_(NET_WM_NAME);
  98     CREATE_(NET_WM_VISIBLE_NAME);
  99     CREATE_(NET_WM_ICON_NAME);
 100     CREATE_(NET_WM_VISIBLE_ICON_NAME);
 101     CREATE_(NET_WM_DESKTOP);
 102     CREATE_(NET_WM_WINDOW_TYPE);
 103     CREATE_(NET_WM_STATE);
 104     CREATE_(NET_WM_STRUT);
 105     CREATE_(NET_WM_STRUT_PARTIAL);
 106     CREATE_(NET_WM_ICON);
 107     CREATE_(NET_WM_ICON_GEOMETRY);
 108     CREATE_(NET_WM_PID);
 109     CREATE_(NET_WM_ALLOWED_ACTIONS);
 110     CREATE_(NET_WM_WINDOW_OPACITY);
 111     CREATE_(NET_WM_USER_TIME);
 112 /*  CREATE_(NET_WM_USER_TIME_WINDOW); */
 113     CREATE_(KDE_NET_WM_FRAME_STRUT);
 114     CREATE_(NET_FRAME_EXTENTS);
 115
 116     CREATE_(NET_WM_PING);
 117 #ifdef SYNC
 118     CREATE_(NET_WM_SYNC_REQUEST);
 119     CREATE_(NET_WM_SYNC_REQUEST_COUNTER);
 120 #endif
 121
 122     CREATE_(NET_WM_WINDOW_TYPE_DESKTOP);
 123     CREATE_(NET_WM_WINDOW_TYPE_DOCK);
 124     CREATE_(NET_WM_WINDOW_TYPE_TOOLBAR);
 125     CREATE_(NET_WM_WINDOW_TYPE_MENU);
 126     CREATE_(NET_WM_WINDOW_TYPE_UTILITY);
 127     CREATE_(NET_WM_WINDOW_TYPE_SPLASH);
 128     CREATE_(NET_WM_WINDOW_TYPE_DIALOG);
 129     CREATE_(NET_WM_WINDOW_TYPE_NORMAL);
 130     CREATE_(NET_WM_WINDOW_TYPE_POPUP_MENU);
 131
 132     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_TOPLEFT] = 0;
 133     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_TOP] = 1;
 134     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_TOPRIGHT] = 2;
 135     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_RIGHT] = 3;
 136     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT] = 4;
 137     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_BOTTOM] = 5;
 138     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT] = 6;
 139     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_LEFT] = 7;
 140     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_MOVE] = 8;
 141     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_SIZE_KEYBOARD] = 9;
 142     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_MOVE_KEYBOARD] = 10;
 143     prop_atoms[OBT_PROP_NET_WM_MOVERESIZE_CANCEL] = 11;
 144
 145     CREATE_(NET_WM_ACTION_MOVE);
 146     CREATE_(NET_WM_ACTION_RESIZE);
 147     CREATE_(NET_WM_ACTION_MINIMIZE);
 148     CREATE_(NET_WM_ACTION_SHADE);
 149     CREATE_(NET_WM_ACTION_MAXIMIZE_HORZ);
 150     CREATE_(NET_WM_ACTION_MAXIMIZE_VERT);
 151     CREATE_(NET_WM_ACTION_FULLSCREEN);
 152     CREATE_(NET_WM_ACTION_CHANGE_DESKTOP);
 153     CREATE_(NET_WM_ACTION_CLOSE);
 154     CREATE_(NET_WM_ACTION_ABOVE);
 155     CREATE_(NET_WM_ACTION_BELOW);
 156
 157     CREATE_(NET_WM_STATE_MODAL);
 158 /*    CREATE_(NET_WM_STATE_STICKY);*/
 159     CREATE_(NET_WM_STATE_MAXIMIZED_VERT);
 160     CREATE_(NET_WM_STATE_MAXIMIZED_HORZ);
 161     CREATE_(NET_WM_STATE_SHADED);
 162     CREATE_(NET_WM_STATE_SKIP_TASKBAR);
 163     CREATE_(NET_WM_STATE_SKIP_PAGER);
 164     CREATE_(NET_WM_STATE_HIDDEN);
 165     CREATE_(NET_WM_STATE_FULLSCREEN);
 166     CREATE_(NET_WM_STATE_ABOVE);
 167     CREATE_(NET_WM_STATE_BELOW);
 168     CREATE_(NET_WM_STATE_DEMANDS_ATTENTION);
 169
 170     prop_atoms[OBT_PROP_NET_WM_STATE_ADD] = 1;
 171     prop_atoms[OBT_PROP_NET_WM_STATE_REMOVE] = 0;
 172     prop_atoms[OBT_PROP_NET_WM_STATE_TOGGLE] = 2;
 173
 174     prop_atoms[OBT_PROP_NET_WM_ORIENTATION_HORZ] = 0;
 175     prop_atoms[OBT_PROP_NET_WM_ORIENTATION_VERT] = 1;
 176     prop_atoms[OBT_PROP_NET_WM_TOPLEFT] = 0;
 177     prop_atoms[OBT_PROP_NET_WM_TOPRIGHT] = 1;
 178     prop_atoms[OBT_PROP_NET_WM_BOTTOMRIGHT] = 2;
 179     prop_atoms[OBT_PROP_NET_WM_BOTTOMLEFT] = 3;
 180
 181     CREATE_(KDE_WM_CHANGE_STATE);
 182     CREATE_(KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
 183
 184 /*
 185     CREATE_NAME(ROOTPMAPId, "_XROOTPMAP_ID");
 186     CREATE_NAME(ESETROOTId, "ESETROOT_PMAP_ID");
 187 */
 188
 189     CREATE_(OPENBOX_PID);
 190     CREATE_(OB_THEME);
 191     CREATE_(OB_CONFIG_FILE);
 192     CREATE_(OB_WM_ACTION_UNDECORATE);
 193     CREATE_(OB_WM_STATE_UNDECORATED);
 194     CREATE_(OB_CONTROL);
 195     CREATE_(OB_VERSION);
 196     CREATE_(OB_APP_ROLE);
 197     CREATE_(OB_APP_TITLE);
 198     CREATE_(OB_APP_NAME);
 199     CREATE_(OB_APP_CLASS);
 200     CREATE_(OB_APP_GROUP_NAME);
 201     CREATE_(OB_APP_GROUP_CLASS);
 202     CREATE_(OB_APP_TYPE);
 203 }
 204
 205 Atom obt_prop_atom(ObtPropAtom a)
 206 {
 207     g_assert(prop_started);
 208     g_assert(a < OBT_PROP_NUM_ATOMS);
 209     return prop_atoms[a];
 210 }
 211
 212 static gboolean get_prealloc(Window win, Atom prop, Atom type, gint size,
 213                              guchar *data, gulong num)
 214 {
 215     gboolean ret = FALSE;
 216     gint res;
 217     guchar *xdata = NULL;
 218     Atom ret_type;
 219     gint ret_size;
 220     gulong ret_items, bytes_left;
 221     glong num32 = 32 / size * num; /* num in 32-bit elements */
 222
 223     res = XGetWindowProperty(obt_display, win, prop, 0l, num32,
 224                              FALSE, type, &ret_type, &ret_size,
 225                              &ret_items, &bytes_left, &xdata);
 226     if (res == Success && ret_items && xdata) {
 227         if (ret_size == size && ret_items >= num) {
 228             guint i;
 229             for (i = 0; i < num; ++i)
 230                 switch (size) {
 231                 case 8:
 232                     data[i] = xdata[i];
 233                     break;
 234                 case 16:
 235                     ((guint16*)data)[i] = ((gushort*)xdata)[i];
 236                     break;
 237                 case 32:
 238                     ((guint32*)data)[i] = ((gulong*)xdata)[i];
 239                     break;
 240                 default:
 241                     g_assert_not_reached(); /* unhandled size */
 242                 }
 243             ret = TRUE;
 244         }
 245         XFree(xdata);
 246     }
 247     return ret;
 248 }
 249
 250 static gboolean get_all(Window win, Atom prop, Atom type, gint size,
 251                         guchar **data, guint *num)
 252 {
 253     gboolean ret = FALSE;
 254     gint res;
 255     guchar *xdata = NULL;
 256     Atom ret_type;
 257     gint ret_size;
 258     gulong ret_items, bytes_left;
 259
 260     res = XGetWindowProperty(obt_display, win, prop, 0l, G_MAXLONG,
 261                              FALSE, type, &ret_type, &ret_size,
 262                              &ret_items, &bytes_left, &xdata);
 263     if (res == Success) {
 264         if (ret_size == size && ret_items > 0) {
 265             guint i;
 266
 267             *data = g_malloc(ret_items * (size / 8));
 268             for (i = 0; i < ret_items; ++i)
 269                 switch (size) {
 270                 case 8:
 271                     (*data)[i] = xdata[i];
 272                     break;
 273                 case 16:
 274                     ((guint16*)*data)[i] = ((gushort*)xdata)[i];
 275                     break;
 276                 case 32:
 277                     ((guint32*)*data)[i] = ((gulong*)xdata)[i];
 278                     break;
 279                 default:
 280                     g_assert_not_reached(); /* unhandled size */
 281                 }
 282             *num = ret_items;
 283             ret = TRUE;
 284         }
 285         XFree(xdata);
 286     }
 287     return ret;
 288 }
 289
 290 /*! Get a text property from a window, and fill out the XTextProperty with it.
 291   @param win The window to read the property from.
 292   @param prop The atom of the property to read off the window.
 293   @param tprop The XTextProperty to fill out.
 294   @param type 0 to get text of any type, or a value from
 295     ObtPropTextType to restrict the value to a specific type.
 296   @return TRUE if the text was read and validated against the @type, and FALSE
 297     otherwise.
 298 */
 299 static gboolean get_text_property(Window win, Atom prop,
 300                                   XTextProperty *tprop, ObtPropTextType type)
 301 {
 302     if (!(XGetTextProperty(obt_display, win, tprop, prop) && tprop->nitems))
 303         return FALSE;
 304     if (!type)
 305         return TRUE; /* no type checking */
 306     switch (type) {
 307     case OBT_PROP_TEXT_STRING:
 308     case OBT_PROP_TEXT_STRING_XPCS:
 309     case OBT_PROP_TEXT_STRING_NO_CC:
 310         return tprop->encoding == OBT_PROP_ATOM(STRING);
 311     case OBT_PROP_TEXT_COMPOUND_TEXT:
 312         return tprop->encoding == OBT_PROP_ATOM(COMPOUND_TEXT);
 313     case OBT_PROP_TEXT_UTF8_STRING:
 314         return tprop->encoding == OBT_PROP_ATOM(UTF8_STRING);
 315     default:
 316         g_assert_not_reached();
 317         return FALSE;
 318     }
 319 }
 320
 321 /*! Returns one or more UTF-8 encoded strings from the text property.
 322   @param tprop The XTextProperty to convert into UTF-8 string(s).
 323   @param type The type which specifies the format that the text must meet, or
 324     0 to allow any valid characters that can be converted to UTF-8 through.
 325   @param max The maximum number of strings to return.  -1 to return them all.
 326   @return If max is 1, then this returns a gchar* with the single string.
 327     Otherwise, this returns a gchar** of no more than max strings (or all
 328     strings read, if max is negative). If an error occurs, NULL is returned.
 329  */
 330 static void* convert_text_property(XTextProperty *tprop,
 331                                    ObtPropTextType type, gint max)
 332 {
 333     enum {
 334         LATIN1,
 335         UTF8,
 336         LOCALE
 337     } encoding;
 338     const gboolean return_single = (max == 1);
 339     gboolean ok = FALSE;
 340     gchar **strlist = NULL;
 341     gchar *single[1] = { NULL };
 342     gchar **retlist = single; /* single is used when max == 1 */
 343     gint i, n_strs;
 344
 345     /* Read each string in the text property and store a pointer to it in
 346        retlist.  These pointers point into the X data structures directly.
 347
 348        Then we will convert them to UTF-8, and replace the retlist pointer with
 349        a new one.
 350     */
 351     if (tprop->encoding == OBT_PROP_ATOM(COMPOUND_TEXT))
 352     {
 353         encoding = LOCALE;
 354         ok = (XmbTextPropertyToTextList(
 355                    obt_display, tprop, &strlist, &n_strs) == Success);
 356         if (ok) {
 357             if (max >= 0)
 358                 n_strs = MIN(max, n_strs);
 359             if (!return_single)
 360                 retlist = g_new0(gchar*, n_strs+1);
 361             if (retlist)
 362                 for (i = 0; i < n_strs; ++i)
 363                     retlist[i] = strlist[i];
 364         }
 365     }
 366     else if (tprop->encoding == OBT_PROP_ATOM(UTF8_STRING) ||
 367              tprop->encoding == OBT_PROP_ATOM(STRING))
 368     {
 369         gchar *p; /* iterator */
 370
 371         if (tprop->encoding == OBT_PROP_ATOM(STRING))
 372             encoding = LATIN1;
 373         else
 374             encoding = UTF8;
 375         ok = TRUE;
 376
 377         /* First, count the number of strings. Then make a structure for them
 378            and copy pointers to them into it. */
 379         p = (gchar*)tprop->value;
 380         n_strs = 0;
 381         while (p < (gchar*)tprop->value + tprop->nitems) {
 382             p += strlen(p) + 1; /* next string */
 383             ++n_strs;
 384         }
 385
 386         if (max >= 0)
 387             n_strs = MIN(max, n_strs);
 388         if (!return_single)
 389             retlist = g_new0(gchar*, n_strs+1);
 390         if (retlist) {
 391             p = (gchar*)tprop->value;
 392             for (i = 0; i < n_strs; ++i) {
 393                 retlist[i] = p;
 394                 p += strlen(p) + 1; /* next string */
 395             }
 396         }
 397     }
 398
 399     if (!(ok && retlist)) {
 400         if (strlist) XFreeStringList(strlist);
 401         return NULL;
 402     }
 403
 404     /* convert each element in retlist to UTF-8, and replace it. */
 405     for (i = 0; i < n_strs; ++i) {
 406         if (encoding == UTF8) {
 407             const gchar *end; /* the first byte past the valid data */
 408
 409             g_utf8_validate(retlist[i], -1, &end);
 410             retlist[i] = g_strndup(retlist[i], end-retlist[i]);
 411         }
 412         else if (encoding == LOCALE) {
 413             gsize nvalid; /* the number of valid bytes at the front of the
 414                              string */
 415             gchar *utf; /* the string converted into utf8 */
 416
 417             utf = g_locale_to_utf8(retlist[i], -1, &nvalid, NULL, NULL);
 418             if (!utf)
 419                 utf = g_locale_to_utf8(retlist[i], nvalid, NULL, NULL, NULL);
 420             g_assert(utf);
 421             retlist[i] = utf;
 422         }
 423         else { /* encoding == LATIN1 */
 424             gsize nvalid; /* the number of valid bytes at the front of the
 425                              string */
 426             gchar *utf; /* the string converted into utf8 */
 427             gchar *p; /* iterator */
 428
 429             /* look for invalid characters */
 430             for (p = retlist[i], nvalid = 0; *p; ++p, ++nvalid) {
 431                 /* The only valid control characters are TAB(HT)=9 and
 432                    NEWLINE(LF)=10.
 433                    This is defined in ICCCM section 2:
 434                      http://tronche.com/gui/x/icccm/sec-2.html.
 435                    See a definition of the latin1 codepage here:
 436                      http://en.wikipedia.org/wiki/ISO/IEC_8859-1.
 437                    The above page includes control characters in the table,
 438                    which we must explicitly exclude, as the g_convert function
 439                    will happily take them.
 440                 */
 441                 const register guchar c = (guchar)*p; /* unsigned value at p */
 442                 if ((c < 32 && c != 9 && c != 10) || (c >= 127 && c <= 160))
 443                     break; /* found a control character that isn't allowed */
 444
 445                 if (type == OBT_PROP_TEXT_STRING_NO_CC && c < 32)
 446                     break; /* absolutely no control characters are allowed */
 447
 448                 if (type == OBT_PROP_TEXT_STRING_XPCS) {
 449                     const gboolean valid = (
 450                         (c >= 32 && c < 128) || c == 9 || c == 10);
 451                     if (!valid)
 452                         break; /* strict whitelisting for XPCS */
 453                 }
 454             }
 455             /* look for invalid latin1 characters */
 456             utf = g_convert(retlist[i], nvalid, "utf-8", "iso-8859-1",
 457                             &nvalid, NULL, NULL);
 458             if (!utf)
 459                 utf = g_convert(retlist[i], nvalid, "utf-8", "iso-8859-1",
 460                                 NULL, NULL, NULL);
 461             g_assert(utf);
 462             retlist[i] = utf;
 463         }
 464     }
 465
 466     if (strlist) XFreeStringList(strlist);
 467     if (return_single)
 468         return retlist[0];
 469     else
 470         return retlist;
 471 }
 472
 473 gboolean obt_prop_get32(Window win, Atom prop, Atom type, guint32 *ret)
 474 {
 475     return get_prealloc(win, prop, type, 32, (guchar*)ret, 1);
 476 }
 477
 478 gboolean obt_prop_get_array32(Window win, Atom prop, Atom type, guint32 **ret,
 479                               guint *nret)
 480 {
 481     return get_all(win, prop, type, 32, (guchar**)ret, nret);
 482 }
 483
 484 gboolean obt_prop_get_text(Window win, Atom prop, ObtPropTextType type,
 485                            gchar **ret_string)
 486 {
 487     XTextProperty tprop;
 488     gchar *str;
 489     gboolean ret = FALSE;
 490
 491     if (get_text_property(win, prop, &tprop, type)) {
 492         str = (gchar*)convert_text_property(&tprop, type, 1);
 493
 494         if (str) {
 495             *ret_string = str;
 496             ret = TRUE;
 497         }
 498     }
 499     XFree(tprop.value);
 500     return ret;
 501 }
 502
 503 gboolean obt_prop_get_array_text(Window win, Atom prop,
 504                                  ObtPropTextType type,
 505                                  gchar ***ret_strings)
 506 {
 507     XTextProperty tprop;
 508     gchar **strs;
 509     gboolean ret = FALSE;
 510
 511     if (get_text_property(win, prop, &tprop, type)) {
 512         strs = (gchar**)convert_text_property(&tprop, type, -1);
 513
 514         if (strs) {
 515             *ret_strings = strs;
 516             ret = TRUE;
 517         }
 518     }
 519     XFree(tprop.value);
 520     return ret;
 521 }
 522
 523 void obt_prop_set32(Window win, Atom prop, Atom type, gulong val)
 524 {
 525     XChangeProperty(obt_display, win, prop, type, 32, PropModeReplace,
 526                     (guchar*)&val, 1);
 527 }
 528
 529 void obt_prop_set_array32(Window win, Atom prop, Atom type, gulong *val,
 530                       guint num)
 531 {
 532     XChangeProperty(obt_display, win, prop, type, 32, PropModeReplace,
 533                     (guchar*)val, num);
 534 }
 535
 536 void obt_prop_set_text(Window win, Atom prop, const gchar *val)
 537 {
 538     XChangeProperty(obt_display, win, prop, OBT_PROP_ATOM(UTF8_STRING), 8,
 539                     PropModeReplace, (const guchar*)val, strlen(val));
 540 }
 541
 542 void obt_prop_set_array_text(Window win, Atom prop, const gchar *const *strs)
 543 {
 544     GString *str;
 545     gchar const *const *s;
 546
 547     str = g_string_sized_new(0);
 548     for (s = strs; *s; ++s) {
 549         str = g_string_append(str, *s);
 550         str = g_string_append_c(str, '\0');
 551     }
 552     XChangeProperty(obt_display, win, prop, OBT_PROP_ATOM(UTF8_STRING), 8,
 553                     PropModeReplace, (guchar*)str->str, str->len);
 554     g_string_free(str, TRUE);
 555 }
 556
 557 void obt_prop_erase(Window win, Atom prop)
 558 {
 559     XDeleteProperty(obt_display, win, prop);
 560 }
 561
 562 void obt_prop_message(gint screen, Window about, Atom messagetype,
 563                       glong data0, glong data1, glong data2, glong data3,
 564                       glong data4, glong mask)
 565 {
 566     obt_prop_message_to(obt_root(screen), about, messagetype,
 567                         data0, data1, data2, data3, data4, mask);
 568 }
 569
 570 void obt_prop_message_to(Window to, Window about,
 571                          Atom messagetype,
 572                          glong data0, glong data1, glong data2, glong data3,
 573                          glong data4, glong mask)
 574 {
 575     XEvent ce;
 576     ce.xclient.type = ClientMessage;
 577     ce.xclient.message_type = messagetype;
 578     ce.xclient.display = obt_display;
 579     ce.xclient.window = about;
 580     ce.xclient.format = 32;
 581     ce.xclient.data.l[0] = data0;
 582     ce.xclient.data.l[1] = data1;
 583     ce.xclient.data.l[2] = data2;
 584     ce.xclient.data.l[3] = data3;
 585     ce.xclient.data.l[4] = data4;
 586     XSendEvent(obt_display, to, FALSE, mask, &ce);
 587 }