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         XFreeGC(display, window.gc);
 198         memset(&window, 0, sizeof(struct conky_window));
 199 }
 200
 201 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 202                 char **argv, int argc)
 203 {
 204         /* There seems to be some problems with setting transparent background
 205          * (on fluxbox this time). It doesn't happen always and I don't know why it
 206          * happens but I bet the bug is somewhere here. */
 207         set_transparent = set_trans;
 208         background_colour = back_colour;
 209
 210 #ifdef OWN_WINDOW
 211         if (own_window) {
 212                 if (!find_desktop_window(&window.root, &window.desktop)) {
 213                         return;
 214                 }
 215
 216                 if (window.type == TYPE_OVERRIDE) {
 217
 218                         /* An override_redirect True window.
 219                          * No WM hints or button processing needed. */
 220                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 221                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 222                                 True, 0, 0 };
 223
 224                         /* Parent is desktop window (which might be a child of root) */
 225                         window.window = XCreateWindow(display, window.desktop, window.x,
 226                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 227                                 CWBackPixel | CWOverrideRedirect, &attrs);
 228
 229                         XLowerWindow(display, window.window);
 230
 231                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 232                         fflush(stderr);
 233                 } else { /* window.type != TYPE_OVERRIDE */
 234
 235                         /* A window managed by the window manager.
 236                          * Process hints and buttons. */
 237                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 238                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 239                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 240
 241                         XClassHint classHint;
 242                         XWMHints wmHint;
 243                         Atom xa;
 244
 245                         if (window.type == TYPE_DOCK) {
 246                                 window.x = window.y = 0;
 247                         }
 248                         /* Parent is root window so WM can take control */
 249                         window.window = XCreateWindow(display, window.root, window.x,
 250                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 251                                 CWBackPixel | CWOverrideRedirect, &attrs);
 252
 253                         classHint.res_name = window.class_name;
 254                         classHint.res_class = classHint.res_name;
 255
 256                         wmHint.flags = InputHint | StateHint;
 257                         /* allow decorated windows to be given input focus by WM */
 258                         wmHint.input =
 259                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 260                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 261                                 wmHint.initial_state = WithdrawnState;
 262                         } else {
 263                                 wmHint.initial_state = NormalState;
 264                         }
 265
 266                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 267                                 argc, NULL, &wmHint, &classHint);
 268
 269                         /* Sets an empty WM_PROTOCOLS property */
 270                         XSetWMProtocols(display, window.window, NULL, 0);
 271
 272                         /* Set window type */
 273                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 274                                 Atom prop;
 275
 276                                 switch (window.type) {
 277                                         case TYPE_DESKTOP:
 278                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 279                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 280                                                 fflush(stderr);
 281                                                 break;
 282                                         case TYPE_DOCK:
 283                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 284                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 285                                                 fflush(stderr);
 286                                                 break;
 287                                         case TYPE_PANEL:
 288                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 289                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 290                                                 fflush(stderr);
 291                                                 break;
 292                                         case TYPE_NORMAL:
 293                                         default:
 294                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 295                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 296                                                 fflush(stderr);
 297                                                 break;
 298                                 }
 299                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 300                                         PropModeReplace, (unsigned char *) &prop, 1);
 301                         }
 302
 303                         /* Set desired hints */
 304
 305                         /* Window decorations */
 306                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 307                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 308                                 fflush(stderr); */
 309
 310                                 xa = ATOM(_MOTIF_WM_HINTS);
 311                                 if (xa != None) {
 312                                         long prop[5] = { 2, 0, 0, 0, 0 };
 313                                         XChangeProperty(display, window.window, xa, xa, 32,
 314                                                 PropModeReplace, (unsigned char *) prop, 5);
 315                                 }
 316                         }
 317
 318                         /* Below other windows */
 319                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 320                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 321                                 fflush(stderr); */
 322
 323                                 xa = ATOM(_WIN_LAYER);
 324                                 if (xa != None) {
 325                                         long prop = 0;
 326
 327                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 328                                                 PropModeAppend, (unsigned char *) &prop, 1);
 329                                 }
 330
 331                                 xa = ATOM(_NET_WM_STATE);
 332                                 if (xa != None) {
 333                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 334
 335                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 336                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 337                                 }
 338                         }
 339
 340                         /* Above other windows */
 341                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 342                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 343                                 fflush(stderr); */
 344
 345                                 xa = ATOM(_WIN_LAYER);
 346                                 if (xa != None) {
 347                                         long prop = 6;
 348
 349                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 350                                                 PropModeAppend, (unsigned char *) &prop, 1);
 351                                 }
 352
 353                                 xa = ATOM(_NET_WM_STATE);
 354                                 if (xa != None) {
 355                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 356
 357                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 358                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 359                                 }
 360                         }
 361
 362                         /* Sticky */
 363                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 364                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 365                                 fflush(stderr); */
 366
 367                                 xa = ATOM(_NET_WM_DESKTOP);
 368                                 if (xa != None) {
 369                                         CARD32 xa_prop = 0xFFFFFFFF;
 370
 371                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 372                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 373                                 }
 374
 375                                 xa = ATOM(_NET_WM_STATE);
 376                                 if (xa != None) {
 377                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 378
 379                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 380                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 381                                 }
 382                         }
 383
 384                         /* Skip taskbar */
 385                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 386                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 387                                 fflush(stderr); */
 388
 389                                 xa = ATOM(_NET_WM_STATE);
 390                                 if (xa != None) {
 391                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 392
 393                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 394                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 395                                 }
 396                         }
 397
 398                         /* Skip pager */
 399                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 400                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 401                                 fflush(stderr); */
 402
 403                                 xa = ATOM(_NET_WM_STATE);
 404                                 if (xa != None) {
 405                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 406
 407                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 408                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 409                                 }
 410                         }
 411                 } /* else { window.type != TYPE_OVERRIDE */
 412
 413                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 414                         window.window);
 415                 fflush(stderr);
 416
 417                 XMapWindow(display, window.window);
 418
 419         } else /* if (own_window) { */
 420 #endif
 421                 /* root / desktop window */
 422         {
 423                 XWindowAttributes attrs;
 424
 425                 if (!window.window) {
 426                         window.window = find_desktop_window(&window.root, &window.desktop);
 427                 }
 428
 429                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 430                         window.width = attrs.width;
 431                         window.height = attrs.height;
 432                 }
 433
 434                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 435         }
 436
 437         /* Drawable is same as window. This may be changed by double buffering. */
 438         window.drawable = window.window;
 439
 440 #ifdef HAVE_XDBE
 441         if (use_xdbe) {
 442                 int major, minor;
 443
 444                 if (!XdbeQueryExtension(display, &major, &minor)) {
 445                         use_xdbe = 0;
 446                 } else {
 447                         window.back_buffer = XdbeAllocateBackBufferName(display,
 448                                 window.window, XdbeBackground);
 449                         if (window.back_buffer != None) {
 450                                 window.drawable = window.back_buffer;
 451                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 452                         } else {
 453                                 use_xdbe = 0;
 454                         }
 455                 }
 456                 if (!use_xdbe) {
 457                         ERR("failed to set up double buffer");
 458                 }
 459         }
 460         if (!use_xdbe) {
 461                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 462         }
 463 #endif
 464         window.visual = DefaultVisual(display, DefaultScreen(display));
 465         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 466 #ifdef IMLIB2
 467         {
 468                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 469         }
 470 #endif /* IMLIB2 */
 471         XFlush(display);
 472
 473         /* set_transparent_background(window.window);
 474          * must be done after double buffer stuff? */
 475 #ifdef OWN_WINDOW
 476         /* if (own_window) {
 477                 set_transparent_background(window.window);
 478                 XClearWindow(display, window.window);
 479         } */
 480 #endif
 481
 482         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 483 #ifdef OWN_WINDOW
 484                 | (own_window ? (StructureNotifyMask |
 485                 ButtonPressMask | ButtonReleaseMask) : 0)
 486 #endif
 487                 );
 488 }
 489
 490 static Window find_subwindow(Window win, int w, int h)
 491 {
 492         unsigned int i, j;
 493         Window troot, parent, *children;
 494         unsigned int n;
 495
 496         /* search subwindows with same size as display or work area */
 497
 498         for (i = 0; i < 10; i++) {
 499                 XQueryTree(display, win, &troot, &parent, &children, &n);
 500
 501                 for (j = 0; j < n; j++) {
 502                         XWindowAttributes attrs;
 503
 504                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 505                                 /* Window must be mapped and same size as display or
 506                                  * work space */
 507                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 508                                                 && attrs.height == display_height)
 509                                                 || (attrs.width == w && attrs.height == h))) {
 510                                         win = children[j];
 511                                         break;
 512                                 }
 513                         }
 514                 }
 515
 516                 XFree(children);
 517                 if (j == n) {
 518                         break;
 519                 }
 520         }
 521
 522         return win;
 523 }
 524
 525 long get_x11_color(const char *name)
 526 {
 527         XColor color;
 528
 529         color.pixel = 0;
 530         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 531                 /* lets check if it's a hex colour with the # missing in front
 532                  * if yes, then do something about it */
 533                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 534
 535                 newname[0] = '#';
 536                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 537                 /* now lets try again */
 538                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 539                                 &color)) {
 540                         ERR("can't parse X color '%s'", name);
 541                         return 0xFF00FF;
 542                 }
 543         }
 544         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 545                 ERR("can't allocate X color '%s'", name);
 546         }
 547
 548         return (long) color.pixel;
 549 }
 550
 551 void create_gc(void)
 552 {
 553         XGCValues values;
 554
 555         values.graphics_exposures = 0;
 556         values.function = GXcopy;
 557         window.gc = XCreateGC(display, window.drawable,
 558                 GCFunction | GCGraphicsExposures, &values);
 559 }
 560
 561 //Get current desktop number
 562 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 563 {
 564         Atom actual_type;
 565         int actual_format;
 566         unsigned long nitems;
 567         unsigned long bytes_after;
 568         unsigned char *prop = NULL;
 569         struct information *current_info = &info;
 570
 571         if ( (XGetWindowProperty( current_display, root, atom,
 572                                   0, 1L, False, XA_CARDINAL,
 573                                   &actual_type, &actual_format, &nitems,
 574                                   &bytes_after, &prop ) == Success ) &&
 575              (actual_type == XA_CARDINAL) &&
 576              (nitems == 1L) && (actual_format == 32) ) {
 577           current_info->x11.desktop.current = prop[0]+1;
 578         }
 579         if(prop) {
 580           XFree(prop);
 581         }
 582 }
 583
 584 //Get total number of available desktops
 585 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 586 {
 587         Atom actual_type;
 588         int actual_format;
 589         unsigned long nitems;
 590         unsigned long bytes_after;
 591         unsigned char *prop = NULL;
 592         struct information *current_info = &info;
 593
 594         if ( (XGetWindowProperty( current_display, root, atom,
 595                                   0, 1L, False, XA_CARDINAL,
 596                                   &actual_type, &actual_format, &nitems,
 597                                   &bytes_after, &prop ) == Success ) &&
 598              (actual_type == XA_CARDINAL) &&
 599              (nitems == 1L) && (actual_format == 32) ) {
 600           current_info->x11.desktop.number = prop[0];
 601         }
 602         if(prop) {
 603           XFree(prop);
 604         }
 605 }
 606
 607 //Get all desktop names
 608 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 609 {
 610         Atom actual_type;
 611         int actual_format;
 612         unsigned long nitems;
 613         unsigned long bytes_after;
 614         unsigned char *prop = NULL;
 615         struct information *current_info = &info;
 616
 617         if ( (XGetWindowProperty( current_display, root, atom,
 618                                   0, (~0L), False, ATOM(UTF8_STRING),
 619                                   &actual_type, &actual_format, &nitems,
 620                                   &bytes_after, &prop ) == Success ) &&
 621              (actual_type == ATOM(UTF8_STRING)) &&
 622              (nitems > 0L) && (actual_format == 8) ) {
 623
 624           if(current_info->x11.desktop.all_names) {
 625             free(current_info->x11.desktop.all_names);
 626             current_info->x11.desktop.all_names = NULL;
 627           }
 628           current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 629           memcpy(current_info->x11.desktop.all_names, prop, nitems);
 630           current_info->x11.desktop.nitems = nitems;
 631         }
 632         if(prop) {
 633           XFree(prop);
 634         }
 635 }
 636
 637 //Get current desktop name
 638 static inline void get_x11_desktop_current_name(char *names)
 639 {
 640         struct information *current_info = &info;
 641         unsigned int i = 0, j = 0;
 642         int k = 0;
 643
 644         while ( i < current_info->x11.desktop.nitems ) {
 645           if ( names[i++] == '\0' ) {
 646             if ( ++k == current_info->x11.desktop.current ) {
 647               if (current_info->x11.desktop.name) {
 648                 free(current_info->x11.desktop.name);
 649                 current_info->x11.desktop.name = NULL;
 650               }
 651               current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 652               //desktop names can be empty but should always be not null
 653               strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 654               break;
 655             }
 656             j = i;
 657           }
 658         }
 659 }
 660
 661 void get_x11_desktop_info(Display *current_display, Atom atom)
 662 {
 663         Window root;
 664         static Atom atom_current, atom_number, atom_names;
 665         struct information *current_info = &info;
 666
 667         root = RootWindow(current_display, current_info->x11.monitor.current);
 668
 669         //Check if we initialise else retrieve changed property
 670         if (atom == 0) {
 671           atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 672           atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 673           atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 674           get_x11_desktop_current(current_display, root, atom_current);
 675           get_x11_desktop_number(current_display, root, atom_number);
 676           get_x11_desktop_names(current_display, root, atom_names);
 677           get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 678         } else {
 679           if (atom == atom_current) {
 680             get_x11_desktop_current(current_display, root, atom_current);
 681             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 682           } else if (atom == atom_number) {
 683             get_x11_desktop_number(current_display, root, atom_number);
 684           } else if (atom == atom_names) {
 685             get_x11_desktop_names(current_display, root, atom_names);
 686             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 687           }
 688         }
 689 }
 690
 691 void update_x11info(void)
 692 {
 693         struct information *current_info = &info;
 694         current_info->x11.monitor.number = XScreenCount(display);
 695         current_info->x11.monitor.current = XDefaultScreen(display);
 696 }
 697
 698 #ifdef OWN_WINDOW
 699 /* reserve window manager space */
 700 void set_struts(int sidenum)
 701 {
 702         Atom strut;
 703         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 704                 /* reserve space at left, right, top, bottom */
 705                 signed long sizes[12] = {0};
 706                 int i;
 707
 708                 /* define strut depth */
 709                 switch (sidenum) {
 710                         case 0:
 711                         {
 712                                 /* left side */
 713                                 sizes[0] = window.x + window.width;
 714                                 break;
 715                         }
 716                         case 1:
 717                         {
 718                                 /* right side */
 719                                 sizes[1] = display_width - window.x;
 720                                 break;
 721                         }
 722                         case 2:
 723                         {
 724                                 /* top side */
 725                                 sizes[2] = window.y + window.height;
 726                                 break;
 727                         }
 728                         case 3:
 729                         {
 730                                 /* bottom side */
 731                                 sizes[3] = display_height - window.y;
 732                                 break;
 733                         }
 734                 }
 735
 736                 /* define partial strut length */
 737                 if (sidenum <= 1) {
 738                         sizes[4 + (sidenum*2)] = window.y;
 739                         sizes[5 + (sidenum*2)] = window.y + window.height;
 740                 } else if (sidenum <= 3) {
 741                         sizes[4 + (sidenum*2)] = window.x;
 742                         sizes[5 + (sidenum*2)] = window.x + window.width;
 743                 }
 744
 745                 /* check constraints */
 746                 for (i = 0; i < 12; i++) {
 747                         if (sizes[i] < 0) {
 748                                 sizes[i] = 0;
 749                         } else {
 750                                 if (i <= 1 || i >= 8) {
 751                                         if (sizes[i] > display_width) {
 752                                                 sizes[i] = display_width;
 753                                         }
 754                                 } else {
 755                                         if (sizes[i] > display_height) {
 756                                                 sizes[i] = display_height;
 757                                         }
 758                                 }
 759                         }
 760                 }
 761
 762                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 763                                 PropModeReplace, (unsigned char *) &sizes, 4);
 764
 765                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 766                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 767                                         PropModeReplace, (unsigned char *) &sizes, 12);
 768                 }
 769         }
 770 }
 771 #endif /* OWN_WINDOW */