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(NULL, NULL, "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         if(window.xftdraw) {
 198                 XftDrawDestroy(window.xftdraw);
 199         }
 200         if(window.gc) {
 201                 XFreeGC(display, window.gc);
 202         }
 203         memset(&window, 0, sizeof(struct conky_window));
 204 }
 205
 206 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 207                 char **argv, int argc)
 208 {
 209         /* There seems to be some problems with setting transparent background
 210          * (on fluxbox this time). It doesn't happen always and I don't know why it
 211          * happens but I bet the bug is somewhere here. */
 212         set_transparent = set_trans;
 213         background_colour = back_colour;
 214
 215 #ifdef OWN_WINDOW
 216         if (own_window) {
 217                 if (!find_desktop_window(&window.root, &window.desktop)) {
 218                         return;
 219                 }
 220
 221                 if (window.type == TYPE_OVERRIDE) {
 222
 223                         /* An override_redirect True window.
 224                          * No WM hints or button processing needed. */
 225                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 226                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 227                                 True, 0, 0 };
 228
 229                         /* Parent is desktop window (which might be a child of root) */
 230                         window.window = XCreateWindow(display, window.desktop, window.x,
 231                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 232                                 CWBackPixel | CWOverrideRedirect, &attrs);
 233
 234                         XLowerWindow(display, window.window);
 235
 236                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 237                         fflush(stderr);
 238                 } else { /* window.type != TYPE_OVERRIDE */
 239
 240                         /* A window managed by the window manager.
 241                          * Process hints and buttons. */
 242                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 243                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 244                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 245
 246                         XClassHint classHint;
 247                         XWMHints wmHint;
 248                         Atom xa;
 249
 250                         if (window.type == TYPE_DOCK) {
 251                                 window.x = window.y = 0;
 252                         }
 253                         /* Parent is root window so WM can take control */
 254                         window.window = XCreateWindow(display, window.root, window.x,
 255                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 256                                 CWBackPixel | CWOverrideRedirect, &attrs);
 257
 258                         classHint.res_name = window.class_name;
 259                         classHint.res_class = classHint.res_name;
 260
 261                         wmHint.flags = InputHint | StateHint;
 262                         /* allow decorated windows to be given input focus by WM */
 263                         wmHint.input =
 264                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 265                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 266                                 wmHint.initial_state = WithdrawnState;
 267                         } else {
 268                                 wmHint.initial_state = NormalState;
 269                         }
 270
 271                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 272                                 argc, NULL, &wmHint, &classHint);
 273
 274                         /* Sets an empty WM_PROTOCOLS property */
 275                         XSetWMProtocols(display, window.window, NULL, 0);
 276
 277                         /* Set window type */
 278                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 279                                 Atom prop;
 280
 281                                 switch (window.type) {
 282                                         case TYPE_DESKTOP:
 283                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 284                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 285                                                 fflush(stderr);
 286                                                 break;
 287                                         case TYPE_DOCK:
 288                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 289                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 290                                                 fflush(stderr);
 291                                                 break;
 292                                         case TYPE_PANEL:
 293                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 294                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 295                                                 fflush(stderr);
 296                                                 break;
 297                                         case TYPE_NORMAL:
 298                                         default:
 299                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 300                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 301                                                 fflush(stderr);
 302                                                 break;
 303                                 }
 304                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 305                                         PropModeReplace, (unsigned char *) &prop, 1);
 306                         }
 307
 308                         /* Set desired hints */
 309
 310                         /* Window decorations */
 311                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 312                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 313                                 fflush(stderr); */
 314
 315                                 xa = ATOM(_MOTIF_WM_HINTS);
 316                                 if (xa != None) {
 317                                         long prop[5] = { 2, 0, 0, 0, 0 };
 318                                         XChangeProperty(display, window.window, xa, xa, 32,
 319                                                 PropModeReplace, (unsigned char *) prop, 5);
 320                                 }
 321                         }
 322
 323                         /* Below other windows */
 324                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 325                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 326                                 fflush(stderr); */
 327
 328                                 xa = ATOM(_WIN_LAYER);
 329                                 if (xa != None) {
 330                                         long prop = 0;
 331
 332                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 333                                                 PropModeAppend, (unsigned char *) &prop, 1);
 334                                 }
 335
 336                                 xa = ATOM(_NET_WM_STATE);
 337                                 if (xa != None) {
 338                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 339
 340                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 341                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 342                                 }
 343                         }
 344
 345                         /* Above other windows */
 346                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 347                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 348                                 fflush(stderr); */
 349
 350                                 xa = ATOM(_WIN_LAYER);
 351                                 if (xa != None) {
 352                                         long prop = 6;
 353
 354                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 355                                                 PropModeAppend, (unsigned char *) &prop, 1);
 356                                 }
 357
 358                                 xa = ATOM(_NET_WM_STATE);
 359                                 if (xa != None) {
 360                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 361
 362                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 363                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 364                                 }
 365                         }
 366
 367                         /* Sticky */
 368                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 369                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 370                                 fflush(stderr); */
 371
 372                                 xa = ATOM(_NET_WM_DESKTOP);
 373                                 if (xa != None) {
 374                                         CARD32 xa_prop = 0xFFFFFFFF;
 375
 376                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 377                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 378                                 }
 379
 380                                 xa = ATOM(_NET_WM_STATE);
 381                                 if (xa != None) {
 382                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 383
 384                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 385                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 386                                 }
 387                         }
 388
 389                         /* Skip taskbar */
 390                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 391                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 392                                 fflush(stderr); */
 393
 394                                 xa = ATOM(_NET_WM_STATE);
 395                                 if (xa != None) {
 396                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 397
 398                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 399                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 400                                 }
 401                         }
 402
 403                         /* Skip pager */
 404                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 405                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 406                                 fflush(stderr); */
 407
 408                                 xa = ATOM(_NET_WM_STATE);
 409                                 if (xa != None) {
 410                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 411
 412                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 413                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 414                                 }
 415                         }
 416                 } /* else { window.type != TYPE_OVERRIDE */
 417
 418                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 419                         window.window);
 420                 fflush(stderr);
 421
 422                 XMapWindow(display, window.window);
 423
 424         } else /* if (own_window) { */
 425 #endif
 426                 /* root / desktop window */
 427         {
 428                 XWindowAttributes attrs;
 429
 430                 if (!window.window) {
 431                         window.window = find_desktop_window(&window.root, &window.desktop);
 432                 }
 433
 434                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 435                         window.width = attrs.width;
 436                         window.height = attrs.height;
 437                 }
 438
 439                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 440         }
 441
 442         /* Drawable is same as window. This may be changed by double buffering. */
 443         window.drawable = window.window;
 444
 445 #ifdef HAVE_XDBE
 446         if (use_xdbe) {
 447                 int major, minor;
 448
 449                 if (!XdbeQueryExtension(display, &major, &minor)) {
 450                         use_xdbe = 0;
 451                 } else {
 452                         window.back_buffer = XdbeAllocateBackBufferName(display,
 453                                 window.window, XdbeBackground);
 454                         if (window.back_buffer != None) {
 455                                 window.drawable = window.back_buffer;
 456                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 457                         } else {
 458                                 use_xdbe = 0;
 459                         }
 460                 }
 461                 if (!use_xdbe) {
 462                         ERR("failed to set up double buffer");
 463                 }
 464         }
 465         if (!use_xdbe) {
 466                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 467         }
 468 #endif
 469         window.visual = DefaultVisual(display, DefaultScreen(display));
 470         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 471 #ifdef IMLIB2
 472         {
 473                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 474         }
 475 #endif /* IMLIB2 */
 476         XFlush(display);
 477
 478         /* set_transparent_background(window.window);
 479          * must be done after double buffer stuff? */
 480 #ifdef OWN_WINDOW
 481         /* if (own_window) {
 482                 set_transparent_background(window.window);
 483                 XClearWindow(display, window.window);
 484         } */
 485 #endif
 486
 487         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 488 #ifdef OWN_WINDOW
 489                 | (own_window ? (StructureNotifyMask |
 490                 ButtonPressMask | ButtonReleaseMask) : 0)
 491 #endif
 492                 );
 493 }
 494
 495 static Window find_subwindow(Window win, int w, int h)
 496 {
 497         unsigned int i, j;
 498         Window troot, parent, *children;
 499         unsigned int n;
 500
 501         /* search subwindows with same size as display or work area */
 502
 503         for (i = 0; i < 10; i++) {
 504                 XQueryTree(display, win, &troot, &parent, &children, &n);
 505
 506                 for (j = 0; j < n; j++) {
 507                         XWindowAttributes attrs;
 508
 509                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 510                                 /* Window must be mapped and same size as display or
 511                                  * work space */
 512                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 513                                                 && attrs.height == display_height)
 514                                                 || (attrs.width == w && attrs.height == h))) {
 515                                         win = children[j];
 516                                         break;
 517                                 }
 518                         }
 519                 }
 520
 521                 XFree(children);
 522                 if (j == n) {
 523                         break;
 524                 }
 525         }
 526
 527         return win;
 528 }
 529
 530 long get_x11_color(const char *name)
 531 {
 532         XColor color;
 533
 534         color.pixel = 0;
 535         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 536                 /* lets check if it's a hex colour with the # missing in front
 537                  * if yes, then do something about it */
 538                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 539
 540                 newname[0] = '#';
 541                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 542                 /* now lets try again */
 543                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 544                                 &color)) {
 545                         ERR("can't parse X color '%s'", name);
 546                         return 0xFF00FF;
 547                 }
 548         }
 549         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 550                 ERR("can't allocate X color '%s'", name);
 551         }
 552
 553         return (long) color.pixel;
 554 }
 555
 556 void create_gc(void)
 557 {
 558         XGCValues values;
 559
 560         values.graphics_exposures = 0;
 561         values.function = GXcopy;
 562         window.gc = XCreateGC(display, window.drawable,
 563                 GCFunction | GCGraphicsExposures, &values);
 564 }
 565
 566 //Get current desktop number
 567 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 568 {
 569         Atom actual_type;
 570         int actual_format;
 571         unsigned long nitems;
 572         unsigned long bytes_after;
 573         unsigned char *prop = NULL;
 574         struct information *current_info = &info;
 575
 576         if ( (XGetWindowProperty( current_display, root, atom,
 577                                   0, 1L, False, XA_CARDINAL,
 578                                   &actual_type, &actual_format, &nitems,
 579                                   &bytes_after, &prop ) == Success ) &&
 580              (actual_type == XA_CARDINAL) &&
 581              (nitems == 1L) && (actual_format == 32) ) {
 582           current_info->x11.desktop.current = prop[0]+1;
 583         }
 584         if(prop) {
 585           XFree(prop);
 586         }
 587 }
 588
 589 //Get total number of available desktops
 590 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 591 {
 592         Atom actual_type;
 593         int actual_format;
 594         unsigned long nitems;
 595         unsigned long bytes_after;
 596         unsigned char *prop = NULL;
 597         struct information *current_info = &info;
 598
 599         if ( (XGetWindowProperty( current_display, root, atom,
 600                                   0, 1L, False, XA_CARDINAL,
 601                                   &actual_type, &actual_format, &nitems,
 602                                   &bytes_after, &prop ) == Success ) &&
 603              (actual_type == XA_CARDINAL) &&
 604              (nitems == 1L) && (actual_format == 32) ) {
 605           current_info->x11.desktop.number = prop[0];
 606         }
 607         if(prop) {
 608           XFree(prop);
 609         }
 610 }
 611
 612 //Get all desktop names
 613 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 614 {
 615         Atom actual_type;
 616         int actual_format;
 617         unsigned long nitems;
 618         unsigned long bytes_after;
 619         unsigned char *prop = NULL;
 620         struct information *current_info = &info;
 621
 622         if ( (XGetWindowProperty( current_display, root, atom,
 623                                   0, (~0L), False, ATOM(UTF8_STRING),
 624                                   &actual_type, &actual_format, &nitems,
 625                                   &bytes_after, &prop ) == Success ) &&
 626              (actual_type == ATOM(UTF8_STRING)) &&
 627              (nitems > 0L) && (actual_format == 8) ) {
 628
 629           if(current_info->x11.desktop.all_names) {
 630             free(current_info->x11.desktop.all_names);
 631             current_info->x11.desktop.all_names = NULL;
 632           }
 633           current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 634           memcpy(current_info->x11.desktop.all_names, prop, nitems);
 635           current_info->x11.desktop.nitems = nitems;
 636         }
 637         if(prop) {
 638           XFree(prop);
 639         }
 640 }
 641
 642 //Get current desktop name
 643 static inline void get_x11_desktop_current_name(char *names)
 644 {
 645         struct information *current_info = &info;
 646         unsigned int i = 0, j = 0;
 647         int k = 0;
 648
 649         while ( i < current_info->x11.desktop.nitems ) {
 650           if ( names[i++] == '\0' ) {
 651             if ( ++k == current_info->x11.desktop.current ) {
 652               if (current_info->x11.desktop.name) {
 653                 free(current_info->x11.desktop.name);
 654                 current_info->x11.desktop.name = NULL;
 655               }
 656               current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 657               //desktop names can be empty but should always be not null
 658               strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 659               break;
 660             }
 661             j = i;
 662           }
 663         }
 664 }
 665
 666 void get_x11_desktop_info(Display *current_display, Atom atom)
 667 {
 668         Window root;
 669         static Atom atom_current, atom_number, atom_names;
 670         struct information *current_info = &info;
 671         XWindowAttributes window_attributes;
 672
 673         root = RootWindow(current_display, current_info->x11.monitor.current);
 674
 675         //Check if we initialise else retrieve changed property
 676         if (atom == 0) {
 677           atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 678           atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 679           atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 680           get_x11_desktop_current(current_display, root, atom_current);
 681           get_x11_desktop_number(current_display, root, atom_number);
 682           get_x11_desktop_names(current_display, root, atom_names);
 683           get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 684
 685           //Set the PropertyChangeMask on the root window, if not set
 686           XGetWindowAttributes(display, root, &window_attributes);
 687           if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 688             XSetWindowAttributes attributes;
 689             attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 690             XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 691             XGetWindowAttributes(display, root, &window_attributes);
 692           }
 693         } else {
 694           if (atom == atom_current) {
 695             get_x11_desktop_current(current_display, root, atom_current);
 696             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 697           } else if (atom == atom_number) {
 698             get_x11_desktop_number(current_display, root, atom_number);
 699           } else if (atom == atom_names) {
 700             get_x11_desktop_names(current_display, root, atom_names);
 701             get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 702           }
 703         }
 704 }
 705
 706 void update_x11info(void)
 707 {
 708         struct information *current_info = &info;
 709         current_info->x11.monitor.number = XScreenCount(display);
 710         current_info->x11.monitor.current = XDefaultScreen(display);
 711 }
 712
 713 #ifdef OWN_WINDOW
 714 /* reserve window manager space */
 715 void set_struts(int sidenum)
 716 {
 717         Atom strut;
 718         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 719                 /* reserve space at left, right, top, bottom */
 720                 signed long sizes[12] = {0};
 721                 int i;
 722
 723                 /* define strut depth */
 724                 switch (sidenum) {
 725                         case 0:
 726                         {
 727                                 /* left side */
 728                                 sizes[0] = window.x + window.width;
 729                                 break;
 730                         }
 731                         case 1:
 732                         {
 733                                 /* right side */
 734                                 sizes[1] = display_width - window.x;
 735                                 break;
 736                         }
 737                         case 2:
 738                         {
 739                                 /* top side */
 740                                 sizes[2] = window.y + window.height;
 741                                 break;
 742                         }
 743                         case 3:
 744                         {
 745                                 /* bottom side */
 746                                 sizes[3] = display_height - window.y;
 747                                 break;
 748                         }
 749                 }
 750
 751                 /* define partial strut length */
 752                 if (sidenum <= 1) {
 753                         sizes[4 + (sidenum*2)] = window.y;
 754                         sizes[5 + (sidenum*2)] = window.y + window.height;
 755                 } else if (sidenum <= 3) {
 756                         sizes[4 + (sidenum*2)] = window.x;
 757                         sizes[5 + (sidenum*2)] = window.x + window.width;
 758                 }
 759
 760                 /* check constraints */
 761                 for (i = 0; i < 12; i++) {
 762                         if (sizes[i] < 0) {
 763                                 sizes[i] = 0;
 764                         } else {
 765                                 if (i <= 1 || i >= 8) {
 766                                         if (sizes[i] > display_width) {
 767                                                 sizes[i] = display_width;
 768                                         }
 769                                 } else {
 770                                         if (sizes[i] > display_height) {
 771                                                 sizes[i] = display_height;
 772                                         }
 773                                 }
 774                         }
 775                 }
 776
 777                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 778                                 PropModeReplace, (unsigned char *) &sizes, 4);
 779
 780                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 781                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 782                                         PropModeReplace, (unsigned char *) &sizes, 12);
 783                 }
 784         }
 785 }
 786 #endif /* OWN_WINDOW */