vcs.maemo.org Git - monky/blob - src/x11.c

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  10  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  11  *      (see AUTHORS)
  12  * All rights reserved.
  13  *
  14  * This program is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation, either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  *
  26  */
  27
  28 #include "config.h"
  29 #include "conky.h"
  30 #include "logging.h"
  31 #include "common.h"
  32
  33 #include "x11.h"
  34 #include <X11/Xlib.h>
  35 #include <X11/Xatom.h>
  36 #include <X11/Xmd.h>
  37 #include <X11/Xutil.h>
  38 #ifdef IMLIB2
  39 #include "imlib2.h"
  40 #endif /* IMLIB2 */
  41
  42 #ifdef XFT
  43 #include <X11/Xft/Xft.h>
  44 int use_xft = 0;
  45 #endif
  46
  47 #ifdef HAVE_XDBE
  48 int use_xdbe;
  49 #endif
  50
  51 /* some basic X11 stuff */
  52 Display *display = NULL;
  53 int display_width;
  54 int display_height;
  55 int screen;
  56 static int set_transparent;
  57 static int background_colour;
  58
  59 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  60 int workarea[4];
  61
  62 /* Window stuff */
  63 struct conky_window window;
  64
  65 /* local prototypes */
  66 static void update_workarea(void);
  67 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  68 static Window find_subwindow(Window win, int w, int h);
  69
  70 /* X11 initializer */
  71 void init_X11(const char *disp)
  72 {
  73         if (!display) {
  74                 if ((display = XOpenDisplay(disp)) == NULL) {
  75                         CRIT_ERR("can't open display: %s", XDisplayName(0));
  76                 }
  77         }
  78
  79         screen = DefaultScreen(display);
  80         display_width = DisplayWidth(display, screen);
  81         display_height = DisplayHeight(display, screen);
  82
  83         get_x11_desktop_info(display, 0);
  84
  85         update_workarea();
  86 }
  87
  88 static void update_workarea(void)
  89 {
  90         /* default work area is display */
  91         workarea[0] = 0;
  92         workarea[1] = 0;
  93         workarea[2] = display_width;
  94         workarea[3] = display_height;
  95 }
  96
  97 /* Find root window and desktop window.
  98  * Return desktop window on success,
  99  * and set root and desktop byref return values.
 100  * Return 0 on failure. */
 101 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 102 {
 103         Atom type;
 104         int format, i;
 105         unsigned long nitems, bytes;
 106         unsigned int n;
 107         Window root = RootWindow(display, screen);
 108         Window win = root;
 109         Window troot, parent, *children;
 110         unsigned char *buf = NULL;
 111
 112         if (!p_root || !p_desktop) {
 113                 return 0;
 114         }
 115
 116         /* some window managers set __SWM_VROOT to some child of root window */
 117
 118         XQueryTree(display, root, &troot, &parent, &children, &n);
 119         for (i = 0; i < (int) n; i++) {
 120                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 121                                 False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 122                                 == Success && type == XA_WINDOW) {
 123                         win = *(Window *) buf;
 124                         XFree(buf);
 125                         XFree(children);
 126                         fprintf(stderr,
 127                                 PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 128                                 win);
 129                         fflush(stderr);
 130                         *p_root = win;
 131                         *p_desktop = win;
 132                         return win;
 133                 }
 134
 135                 if (buf) {
 136                         XFree(buf);
 137                         buf = 0;
 138                 }
 139         }
 140         XFree(children);
 141
 142         /* get subwindows from root */
 143         win = find_subwindow(root, -1, -1);
 144
 145         update_workarea();
 146
 147         win = find_subwindow(win, workarea[2], workarea[3]);
 148
 149         if (buf) {
 150                 XFree(buf);
 151                 buf = 0;
 152         }
 153
 154         if (win != root) {
 155                 fprintf(stderr,
 156                         PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 157                         win, root);
 158         } else {
 159                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 160         }
 161
 162         fflush(stderr);
 163
 164         *p_root = root;
 165         *p_desktop = win;
 166
 167         return win;
 168 }
 169
 170 /* sets background to ParentRelative for the Window and all parents */
 171 void set_transparent_background(Window win)
 172 {
 173         static int colour_set = -1;
 174
 175         if (set_transparent) {
 176                 Window parent = win;
 177                 unsigned int i;
 178
 179                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 180                         Window r, *children;
 181                         unsigned int n;
 182
 183                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 184
 185                         XQueryTree(display, parent, &r, &parent, &children, &n);
 186                         XFree(children);
 187                 }
 188         } else if (colour_set != background_colour) {
 189                 XSetWindowBackground(display, win, background_colour);
 190                 colour_set = background_colour;
 191         }
 192         // XClearWindow(display, win); not sure why this was here
 193 }
 194
 195 void destroy_window(void)
 196 {
 197         XDestroyWindow(display, window.window);
 198         XFreeGC(display, window.gc);
 199         memset(&window, 0, sizeof(struct conky_window));
 200 }
 201
 202 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 203                 char **argv, int argc)
 204 {
 205         /* There seems to be some problems with setting transparent background
 206          * (on fluxbox this time). It doesn't happen always and I don't know why it
 207          * happens but I bet the bug is somewhere here. */
 208         set_transparent = set_trans;
 209         background_colour = back_colour;
 210
 211 #ifdef OWN_WINDOW
 212         if (own_window) {
 213                 if (!find_desktop_window(&window.root, &window.desktop)) {
 214                         return;
 215                 }
 216
 217                 if (window.type == TYPE_OVERRIDE) {
 218
 219                         /* An override_redirect True window.
 220                          * No WM hints or button processing needed. */
 221                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 222                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 223                                 True, 0, 0 };
 224
 225                         /* Parent is desktop window (which might be a child of root) */
 226                         window.window = XCreateWindow(display, window.desktop, window.x,
 227                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 228                                 CWBackPixel | CWOverrideRedirect, &attrs);
 229
 230                         XLowerWindow(display, window.window);
 231
 232                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 233                         fflush(stderr);
 234                 } else { /* window.type != TYPE_OVERRIDE */
 235
 236                         /* A window managed by the window manager.
 237                          * Process hints and buttons. */
 238                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 239                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 240                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 241
 242                         XClassHint classHint;
 243                         XWMHints wmHint;
 244                         Atom xa;
 245
 246                         if (window.type == TYPE_DOCK) {
 247                                 window.x = window.y = 0;
 248                         }
 249                         /* Parent is root window so WM can take control */
 250                         window.window = XCreateWindow(display, window.root, window.x,
 251                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 252                                 CWBackPixel | CWOverrideRedirect, &attrs);
 253
 254                         classHint.res_name = window.class_name;
 255                         classHint.res_class = classHint.res_name;
 256
 257                         wmHint.flags = InputHint | StateHint;
 258                         /* allow decorated windows to be given input focus by WM */
 259                         wmHint.input =
 260                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 261                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 262                                 wmHint.initial_state = WithdrawnState;
 263                         } else {
 264                                 wmHint.initial_state = NormalState;
 265                         }
 266
 267                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 268                                 argc, NULL, &wmHint, &classHint);
 269
 270                         /* Sets an empty WM_PROTOCOLS property */
 271                         XSetWMProtocols(display, window.window, NULL, 0);
 272
 273                         /* Set window type */
 274                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 275                                 Atom prop;
 276
 277                                 switch (window.type) {
 278                                         case TYPE_DESKTOP:
 279                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 280                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 281                                                 fflush(stderr);
 282                                                 break;
 283                                         case TYPE_DOCK:
 284                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 285                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 286                                                 fflush(stderr);
 287                                                 break;
 288                                         case TYPE_PANEL:
 289                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 290                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 291                                                 fflush(stderr);
 292                                                 break;
 293                                         case TYPE_NORMAL:
 294                                         default:
 295                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 296                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 297                                                 fflush(stderr);
 298                                                 break;
 299                                 }
 300                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 301                                         PropModeReplace, (unsigned char *) &prop, 1);
 302                         }
 303
 304                         /* Set desired hints */
 305
 306                         /* Window decorations */
 307                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 308                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 309                                 fflush(stderr); */
 310
 311                                 xa = ATOM(_MOTIF_WM_HINTS);
 312                                 if (xa != None) {
 313                                         long prop[5] = { 2, 0, 0, 0, 0 };
 314                                         XChangeProperty(display, window.window, xa, xa, 32,
 315                                                 PropModeReplace, (unsigned char *) prop, 5);
 316                                 }
 317                         }
 318
 319                         /* Below other windows */
 320                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 321                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 322                                 fflush(stderr); */
 323
 324                                 xa = ATOM(_WIN_LAYER);
 325                                 if (xa != None) {
 326                                         long prop = 0;
 327
 328                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 329                                                 PropModeAppend, (unsigned char *) &prop, 1);
 330                                 }
 331
 332                                 xa = ATOM(_NET_WM_STATE);
 333                                 if (xa != None) {
 334                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 335
 336                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 337                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 338                                 }
 339                         }
 340
 341                         /* Above other windows */
 342                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 343                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 344                                 fflush(stderr); */
 345
 346                                 xa = ATOM(_WIN_LAYER);
 347                                 if (xa != None) {
 348                                         long prop = 6;
 349
 350                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 351                                                 PropModeAppend, (unsigned char *) &prop, 1);
 352                                 }
 353
 354                                 xa = ATOM(_NET_WM_STATE);
 355                                 if (xa != None) {
 356                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 357
 358                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 359                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 360                                 }
 361                         }
 362
 363                         /* Sticky */
 364                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 365                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 366                                 fflush(stderr); */
 367
 368                                 xa = ATOM(_NET_WM_DESKTOP);
 369                                 if (xa != None) {
 370                                         CARD32 xa_prop = 0xFFFFFFFF;
 371
 372                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 373                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 374                                 }
 375
 376                                 xa = ATOM(_NET_WM_STATE);
 377                                 if (xa != None) {
 378                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 379
 380                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 381                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 382                                 }
 383                         }
 384
 385                         /* Skip taskbar */
 386                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 387                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 388                                 fflush(stderr); */
 389
 390                                 xa = ATOM(_NET_WM_STATE);
 391                                 if (xa != None) {
 392                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 393
 394                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 395                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 396                                 }
 397                         }
 398
 399                         /* Skip pager */
 400                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 401                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 402                                 fflush(stderr); */
 403
 404                                 xa = ATOM(_NET_WM_STATE);
 405                                 if (xa != None) {
 406                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 407
 408                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 409                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 410                                 }
 411                         }
 412                 } /* else { window.type != TYPE_OVERRIDE */
 413
 414                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 415                         window.window);
 416                 fflush(stderr);
 417
 418                 XMapWindow(display, window.window);
 419
 420         } else /* if (own_window) { */
 421 #endif
 422                 /* root / desktop window */
 423         {
 424                 XWindowAttributes attrs;
 425
 426                 if (!window.window) {
 427                         window.window = find_desktop_window(&window.root, &window.desktop);
 428                 }
 429
 430                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 431                         window.width = attrs.width;
 432                         window.height = attrs.height;
 433                 }
 434
 435                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 436         }
 437
 438         /* Drawable is same as window. This may be changed by double buffering. */
 439         window.drawable = window.window;
 440
 441 #ifdef HAVE_XDBE
 442         if (use_xdbe) {
 443                 int major, minor;
 444
 445                 if (!XdbeQueryExtension(display, &major, &minor)) {
 446                         use_xdbe = 0;
 447                 } else {
 448                         window.back_buffer = XdbeAllocateBackBufferName(display,
 449                                 window.window, XdbeBackground);
 450                         if (window.back_buffer != None) {
 451                                 window.drawable = window.back_buffer;
 452                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 453                         } else {
 454                                 use_xdbe = 0;
 455                         }
 456                 }
 457                 if (!use_xdbe) {
 458                         ERR("failed to set up double buffer");
 459                 }
 460         }
 461         if (!use_xdbe) {
 462                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 463         }
 464 #endif
 465         window.visual = DefaultVisual(display, DefaultScreen(display));
 466         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 467 #ifdef IMLIB2
 468         {
 469                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 470         }
 471 #endif /* IMLIB2 */
 472         XFlush(display);
 473
 474         /* set_transparent_background(window.window);
 475          * must be done after double buffer stuff? */
 476 #ifdef OWN_WINDOW
 477         /* if (own_window) {
 478                 set_transparent_background(window.window);
 479                 XClearWindow(display, window.window);
 480         } */
 481 #endif
 482
 483         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 484 #ifdef OWN_WINDOW
 485                 | (own_window ? (StructureNotifyMask |
 486                 ButtonPressMask | ButtonReleaseMask) : 0)
 487 #endif
 488                 );
 489 }
 490
 491 static Window find_subwindow(Window win, int w, int h)
 492 {
 493         unsigned int i, j;
 494         Window troot, parent, *children;
 495         unsigned int n;
 496
 497         /* search subwindows with same size as display or work area */
 498
 499         for (i = 0; i < 10; i++) {
 500                 XQueryTree(display, win, &troot, &parent, &children, &n);
 501
 502                 for (j = 0; j < n; j++) {
 503                         XWindowAttributes attrs;
 504
 505                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 506                                 /* Window must be mapped and same size as display or
 507                                  * work space */
 508                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 509                                                 && attrs.height == display_height)
 510                                                 || (attrs.width == w && attrs.height == h))) {
 511                                         win = children[j];
 512                                         break;
 513                                 }
 514                         }
 515                 }
 516
 517                 XFree(children);
 518                 if (j == n) {
 519                         break;
 520                 }
 521         }
 522
 523         return win;
 524 }
 525
 526 long get_x11_color(const char *name)
 527 {
 528         XColor color;
 529
 530         color.pixel = 0;
 531         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 532                 /* lets check if it's a hex colour with the # missing in front
 533                  * if yes, then do something about it */
 534                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 535
 536                 newname[0] = '#';
 537                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 538                 /* now lets try again */
 539                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 540                                 &color)) {
 541                         ERR("can't parse X color '%s'", name);
 542                         return 0xFF00FF;
 543                 }
 544         }
 545         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 546                 ERR("can't allocate X color '%s'", name);
 547         }
 548
 549         return (long) color.pixel;
 550 }
 551
 552 void create_gc(void)
 553 {
 554         XGCValues values;
 555
 556         values.graphics_exposures = 0;
 557         values.function = GXcopy;
 558         window.gc = XCreateGC(display, window.drawable,
 559                 GCFunction | GCGraphicsExposures, &values);
 560 }
 561
 562 //Get current desktop number
 563 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 564 {
 565         Atom actual_type;
 566         int actual_format;
 567         unsigned long nitems;
 568         unsigned long bytes_after;
 569         unsigned char *prop = NULL;
 570         struct information *current_info = &info;
 571
 572         if ( (XGetWindowProperty( current_display, root, atom,
 573                                   0, 1L, False, XA_CARDINAL,
 574                                   &actual_type, &actual_format, &nitems,
 575                                   &bytes_after, &prop ) == Success ) &&
 576              (actual_type == XA_CARDINAL) &&
 577              (nitems == 1L) && (actual_format == 32) ) {
 578           current_info->x11.desktop.current = prop[0]+1;
 579         }
 580         if(prop) {
 581           XFree(prop);
 582         }
 583 }
 584
 585 //Get total number of available desktops
 586 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 587 {
 588         Atom actual_type;
 589         int actual_format;
 590         unsigned long nitems;
 591         unsigned long bytes_after;
 592         unsigned char *prop = NULL;
 593         struct information *current_info = &info;
 594
 595         if ( (XGetWindowProperty( current_display, root, atom,
 596                                   0, 1L, False, XA_CARDINAL,
 597                                   &actual_type, &actual_format, &nitems,
 598                                   &bytes_after, &prop ) == Success ) &&
 599              (actual_type == XA_CARDINAL) &&
 600              (nitems == 1L) && (actual_format == 32) ) {
 601           current_info->x11.desktop.number = prop[0];
 602         }
 603         if(prop) {
 604           XFree(prop);
 605         }
 606 }
 607
 608 //Get all desktop names
 609 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 610 {
 611         Atom actual_type;
 612         int actual_format;
 613         unsigned long nitems;
 614         unsigned long bytes_after;
 615         unsigned char *prop = NULL;
 616         struct information *current_info = &info;
 617
 618         if ( (XGetWindowProperty( current_display, root, atom,
 619                                   0, (~0L), False, ATOM(UTF8_STRING),
 620                                   &actual_type, &actual_format, &nitems,
 621                                   &bytes_after, &prop ) == Success ) &&
 622              (actual_type == ATOM(UTF8_STRING)) &&
 623              (nitems > 0L) && (actual_format == 8) ) {
 624
 625           if(current_info->x11.desktop.all_names) {
 626             free(current_info->x11.desktop.all_names);
 627             current_info->x11.desktop.all_names = NULL;
 628           }
 629           current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 630           memcpy(current_info->x11.desktop.all_names, prop, nitems);
 631           current_info->x11.desktop.nitems = nitems;
 632         }
 633         if(prop) {
 634           XFree(prop);
 635         }
 636 }
 637
 638 //Get current desktop name
 639 static inline void get_x11_desktop_current_name(char *names)
 640 {
 641         struct information *current_info = &info;
 642         unsigned int i = 0, j = 0;
 643         int k = 0;
 644
 645         while ( i < current_info->x11.desktop.nitems ) {
 646           if ( names[i++] == '\0' ) {
 647             if ( ++k == current_info->x11.desktop.current ) {
 648               if (current_info->x11.desktop.name) {
 649                 free(current_info->x11.desktop.name);
 650                 current_info->x11.desktop.name = NULL;
 651               }
 652               current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 653               //desktop names can be empty but should always be not null
 654               strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 655               break;
 656             }
 657             j = i;
 658           }
 659         }
 660 }
 661
 662 void get_x11_desktop_info(Display *current_display, Atom atom)
 663 {
 664         Window root;
 665         static Atom atom_current, atom_number, atom_names;
 666         struct information *current_info = &info;
 667
 668         root = RootWindow(current_display, current_info->x11.monitor.current);
 669
 670         //Check if we initialise else retrieve changed property
 671         if (atom == 0) {
 672           atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 673           atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 674           atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 675           get_x11_desktop_current(current_display, root, atom_current);
 676           get_x11_desktop_number(current_display, root, atom_number);
 677           get_x11_desktop_names(current_display, root, atom_names);
 678           get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 679         } else {
 680           if (atom == atom_current) {
 681             get_x11_desktop_current(current_display, root, atom_current);
 682             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 683           } else if (atom == atom_number) {
 684             get_x11_desktop_number(current_display, root, atom_number);
 685           } else if (atom == atom_names) {
 686             get_x11_desktop_names(current_display, root, atom_names);
 687             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 688           }
 689         }
 690 }
 691
 692 void update_x11info(void)
 693 {
 694         struct information *current_info = &info;
 695         current_info->x11.monitor.number = XScreenCount(display);
 696         current_info->x11.monitor.current = XDefaultScreen(display);
 697 }
 698
 699 #ifdef OWN_WINDOW
 700 /* reserve window manager space */
 701 void set_struts(int sidenum)
 702 {
 703         Atom strut;
 704         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 705                 /* reserve space at left, right, top, bottom */
 706                 signed long sizes[12] = {0};
 707                 int i;
 708
 709                 /* define strut depth */
 710                 switch (sidenum) {
 711                         case 0:
 712                         {
 713                                 /* left side */
 714                                 sizes[0] = window.x + window.width;
 715                                 break;
 716                         }
 717                         case 1:
 718                         {
 719                                 /* right side */
 720                                 sizes[1] = display_width - window.x;
 721                                 break;
 722                         }
 723                         case 2:
 724                         {
 725                                 /* top side */
 726                                 sizes[2] = window.y + window.height;
 727                                 break;
 728                         }
 729                         case 3:
 730                         {
 731                                 /* bottom side */
 732                                 sizes[3] = display_height - window.y;
 733                                 break;
 734                         }
 735                 }
 736
 737                 /* define partial strut length */
 738                 if (sidenum <= 1) {
 739                         sizes[4 + (sidenum*2)] = window.y;
 740                         sizes[5 + (sidenum*2)] = window.y + window.height;
 741                 } else if (sidenum <= 3) {
 742                         sizes[4 + (sidenum*2)] = window.x;
 743                         sizes[5 + (sidenum*2)] = window.x + window.width;
 744                 }
 745
 746                 /* check constraints */
 747                 for (i = 0; i < 12; i++) {
 748                         if (sizes[i] < 0) {
 749                                 sizes[i] = 0;
 750                         } else {
 751                                 if (i <= 1 || i >= 8) {
 752                                         if (sizes[i] > display_width) {
 753                                                 sizes[i] = display_width;
 754                                         }
 755                                 } else {
 756                                         if (sizes[i] > display_height) {
 757                                                 sizes[i] = display_height;
 758                                         }
 759                                 }
 760                         }
 761                 }
 762
 763                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 764                                 PropModeReplace, (unsigned char *) &sizes, 4);
 765
 766                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 767                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 768                                         PropModeReplace, (unsigned char *) &sizes, 12);
 769                 }
 770         }
 771 }
 772 #endif /* OWN_WINDOW */