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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  *
   3  * Conky, a system monitor, based on torsmo
   4  *
   5  * Any original torsmo code is licensed under the BSD license
   6  *
   7  * All code written since the fork of torsmo is licensed under the GPL
   8  *
   9  * Please see COPYING for details
  10  *
  11  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  12  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  13  *      (see AUTHORS)
  14  * All rights reserved.
  15  *
  16  * This program is free software: you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation, either version 3 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  27  *
  28  * vim: ts=4 sw=4 noet ai cindent syntax=c
  29  *
  30  */
  31
  32 #include "config.h"
  33 #include "conky.h"
  34 #include "logging.h"
  35 #include "common.h"
  36
  37 #include "x11.h"
  38 #include <X11/Xlib.h>
  39 #include <X11/Xatom.h>
  40 #include <X11/Xmd.h>
  41 #include <X11/Xutil.h>
  42 #ifdef IMLIB2
  43 #include "imlib2.h"
  44 #endif /* IMLIB2 */
  45
  46 #ifdef XFT
  47 #include <X11/Xft/Xft.h>
  48 int use_xft = 0;
  49 #endif
  50
  51 #ifdef HAVE_XDBE
  52 int use_xdbe;
  53 #endif
  54
  55 /* some basic X11 stuff */
  56 Display *display = NULL;
  57 int display_width;
  58 int display_height;
  59 int screen;
  60 static int set_transparent;
  61 static int background_colour;
  62
  63 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  64 int workarea[4];
  65
  66 /* Window stuff */
  67 struct conky_window window;
  68
  69 /* local prototypes */
  70 static void update_workarea(void);
  71 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  72 static Window find_subwindow(Window win, int w, int h);
  73
  74 /* X11 initializer */
  75 void init_X11(const char *disp)
  76 {
  77         if (!display) {
  78                 if ((display = XOpenDisplay(disp)) == NULL) {
  79                         CRIT_ERR(NULL, NULL, "can't open display: %s", XDisplayName(disp));
  80                 }
  81         }
  82
  83         screen = DefaultScreen(display);
  84         display_width = DisplayWidth(display, screen);
  85         display_height = DisplayHeight(display, screen);
  86
  87         get_x11_desktop_info(display, 0);
  88
  89         update_workarea();
  90 }
  91
  92 static void update_workarea(void)
  93 {
  94         /* default work area is display */
  95         workarea[0] = 0;
  96         workarea[1] = 0;
  97         workarea[2] = display_width;
  98         workarea[3] = display_height;
  99 }
 100
 101 /* Find root window and desktop window.
 102  * Return desktop window on success,
 103  * and set root and desktop byref return values.
 104  * Return 0 on failure. */
 105 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 106 {
 107         Atom type;
 108         int format, i;
 109         unsigned long nitems, bytes;
 110         unsigned int n;
 111         Window root = RootWindow(display, screen);
 112         Window win = root;
 113         Window troot, parent, *children;
 114         unsigned char *buf = NULL;
 115
 116         if (!p_root || !p_desktop) {
 117                 return 0;
 118         }
 119
 120         /* some window managers set __SWM_VROOT to some child of root window */
 121
 122         XQueryTree(display, root, &troot, &parent, &children, &n);
 123         for (i = 0; i < (int) n; i++) {
 124                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 125                                         False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 126                                 == Success && type == XA_WINDOW) {
 127                         win = *(Window *) buf;
 128                         XFree(buf);
 129                         XFree(children);
 130                         fprintf(stderr,
 131                                         PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 132                                         win);
 133                         fflush(stderr);
 134                         *p_root = win;
 135                         *p_desktop = win;
 136                         return win;
 137                 }
 138
 139                 if (buf) {
 140                         XFree(buf);
 141                         buf = 0;
 142                 }
 143         }
 144         XFree(children);
 145
 146         /* get subwindows from root */
 147         win = find_subwindow(root, -1, -1);
 148
 149         update_workarea();
 150
 151         win = find_subwindow(win, workarea[2], workarea[3]);
 152
 153         if (buf) {
 154                 XFree(buf);
 155                 buf = 0;
 156         }
 157
 158         if (win != root) {
 159                 fprintf(stderr,
 160                                 PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 161                                 win, root);
 162         } else {
 163                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 164         }
 165
 166         fflush(stderr);
 167
 168         *p_root = root;
 169         *p_desktop = win;
 170
 171         return win;
 172 }
 173
 174 /* sets background to ParentRelative for the Window and all parents */
 175 void set_transparent_background(Window win)
 176 {
 177         static int colour_set = -1;
 178
 179         if (set_transparent) {
 180                 Window parent = win;
 181                 unsigned int i;
 182
 183                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 184                         Window r, *children;
 185                         unsigned int n;
 186
 187                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 188
 189                         XQueryTree(display, parent, &r, &parent, &children, &n);
 190                         XFree(children);
 191                 }
 192         } else if (colour_set != background_colour) {
 193                 XSetWindowBackground(display, win, background_colour);
 194                 colour_set = background_colour;
 195         }
 196         // XClearWindow(display, win); not sure why this was here
 197 }
 198
 199 void destroy_window(void)
 200 {
 201         if(window.xftdraw) {
 202                 XftDrawDestroy(window.xftdraw);
 203         }
 204         if(window.gc) {
 205                 XFreeGC(display, window.gc);
 206         }
 207         memset(&window, 0, sizeof(struct conky_window));
 208 }
 209
 210 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 211                 char **argv, int argc)
 212 {
 213         /* There seems to be some problems with setting transparent background
 214          * (on fluxbox this time). It doesn't happen always and I don't know why it
 215          * happens but I bet the bug is somewhere here. */
 216         set_transparent = set_trans;
 217         background_colour = back_colour;
 218
 219 #ifdef OWN_WINDOW
 220         if (own_window) {
 221                 if (!find_desktop_window(&window.root, &window.desktop)) {
 222                         return;
 223                 }
 224
 225                 if (window.type == TYPE_OVERRIDE) {
 226
 227                         /* An override_redirect True window.
 228                          * No WM hints or button processing needed. */
 229                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 230                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 231                                 True, 0, 0 };
 232
 233                         /* Parent is desktop window (which might be a child of root) */
 234                         window.window = XCreateWindow(display, window.desktop, window.x,
 235                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 236                                         CWBackPixel | CWOverrideRedirect, &attrs);
 237
 238                         XLowerWindow(display, window.window);
 239
 240                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 241                         fflush(stderr);
 242                 } else { /* window.type != TYPE_OVERRIDE */
 243
 244                         /* A window managed by the window manager.
 245                          * Process hints and buttons. */
 246                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 247                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 248                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 249
 250                         XClassHint classHint;
 251                         XWMHints wmHint;
 252                         Atom xa;
 253
 254                         if (window.type == TYPE_DOCK) {
 255                                 window.x = window.y = 0;
 256                         }
 257                         /* Parent is root window so WM can take control */
 258                         window.window = XCreateWindow(display, window.root, window.x,
 259                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 260                                         CWBackPixel | CWOverrideRedirect, &attrs);
 261
 262                         classHint.res_name = window.class_name;
 263                         classHint.res_class = classHint.res_name;
 264
 265                         wmHint.flags = InputHint | StateHint;
 266                         /* allow decorated windows to be given input focus by WM */
 267                         wmHint.input =
 268                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 269                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 270                                 wmHint.initial_state = WithdrawnState;
 271                         } else {
 272                                 wmHint.initial_state = NormalState;
 273                         }
 274
 275                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 276                                         argc, NULL, &wmHint, &classHint);
 277
 278                         /* Sets an empty WM_PROTOCOLS property */
 279                         XSetWMProtocols(display, window.window, NULL, 0);
 280
 281                         /* Set window type */
 282                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 283                                 Atom prop;
 284
 285                                 switch (window.type) {
 286                                         case TYPE_DESKTOP:
 287                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 288                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 289                                                 fflush(stderr);
 290                                                 break;
 291                                         case TYPE_DOCK:
 292                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 293                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 294                                                 fflush(stderr);
 295                                                 break;
 296                                         case TYPE_PANEL:
 297                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 298                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 299                                                 fflush(stderr);
 300                                                 break;
 301                                         case TYPE_NORMAL:
 302                                         default:
 303                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 304                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 305                                                 fflush(stderr);
 306                                                 break;
 307                                 }
 308                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 309                                                 PropModeReplace, (unsigned char *) &prop, 1);
 310                         }
 311
 312                         /* Set desired hints */
 313
 314                         /* Window decorations */
 315                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 316                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 317                                    fflush(stderr); */
 318
 319                                 xa = ATOM(_MOTIF_WM_HINTS);
 320                                 if (xa != None) {
 321                                         long prop[5] = { 2, 0, 0, 0, 0 };
 322                                         XChangeProperty(display, window.window, xa, xa, 32,
 323                                                         PropModeReplace, (unsigned char *) prop, 5);
 324                                 }
 325                         }
 326
 327                         /* Below other windows */
 328                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 329                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 330                                    fflush(stderr); */
 331
 332                                 xa = ATOM(_WIN_LAYER);
 333                                 if (xa != None) {
 334                                         long prop = 0;
 335
 336                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 337                                                         PropModeAppend, (unsigned char *) &prop, 1);
 338                                 }
 339
 340                                 xa = ATOM(_NET_WM_STATE);
 341                                 if (xa != None) {
 342                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 343
 344                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 345                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 346                                 }
 347                         }
 348
 349                         /* Above other windows */
 350                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 351                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 352                                    fflush(stderr); */
 353
 354                                 xa = ATOM(_WIN_LAYER);
 355                                 if (xa != None) {
 356                                         long prop = 6;
 357
 358                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 359                                                         PropModeAppend, (unsigned char *) &prop, 1);
 360                                 }
 361
 362                                 xa = ATOM(_NET_WM_STATE);
 363                                 if (xa != None) {
 364                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 365
 366                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 367                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 368                                 }
 369                         }
 370
 371                         /* Sticky */
 372                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 373                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 374                                    fflush(stderr); */
 375
 376                                 xa = ATOM(_NET_WM_DESKTOP);
 377                                 if (xa != None) {
 378                                         CARD32 xa_prop = 0xFFFFFFFF;
 379
 380                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 381                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 382                                 }
 383
 384                                 xa = ATOM(_NET_WM_STATE);
 385                                 if (xa != None) {
 386                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 387
 388                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 389                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 390                                 }
 391                         }
 392
 393                         /* Skip taskbar */
 394                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 395                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 396                                    fflush(stderr); */
 397
 398                                 xa = ATOM(_NET_WM_STATE);
 399                                 if (xa != None) {
 400                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 401
 402                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 403                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 404                                 }
 405                         }
 406
 407                         /* Skip pager */
 408                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 409                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 410                                    fflush(stderr); */
 411
 412                                 xa = ATOM(_NET_WM_STATE);
 413                                 if (xa != None) {
 414                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 415
 416                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 417                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 418                                 }
 419                         }
 420                 }
 421
 422                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 423                                 window.window);
 424                 fflush(stderr);
 425
 426                 XMapWindow(display, window.window);
 427
 428         } else
 429 #endif /* OWN_WINDOW */
 430         {
 431                 XWindowAttributes attrs;
 432
 433                 if (!window.window) {
 434                         window.window = find_desktop_window(&window.root, &window.desktop);
 435                 }
 436
 437                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 438                         window.width = attrs.width;
 439                         window.height = attrs.height;
 440                 }
 441
 442                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 443         }
 444
 445         /* Drawable is same as window. This may be changed by double buffering. */
 446         window.drawable = window.window;
 447
 448 #ifdef HAVE_XDBE
 449         if (use_xdbe) {
 450                 int major, minor;
 451
 452                 if (!XdbeQueryExtension(display, &major, &minor)) {
 453                         use_xdbe = 0;
 454                 } else {
 455                         window.back_buffer = XdbeAllocateBackBufferName(display,
 456                                         window.window, XdbeBackground);
 457                         if (window.back_buffer != None) {
 458                                 window.drawable = window.back_buffer;
 459                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 460                         } else {
 461                                 use_xdbe = 0;
 462                         }
 463                 }
 464                 if (!use_xdbe) {
 465                         NORM_ERR("failed to set up double buffer");
 466                 }
 467         }
 468         if (!use_xdbe) {
 469                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 470         }
 471 #endif
 472         window.visual = DefaultVisual(display, DefaultScreen(display));
 473         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 474 #ifdef IMLIB2
 475         {
 476                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 477         }
 478 #endif /* IMLIB2 */
 479         XFlush(display);
 480
 481         /* set_transparent_background(window.window);
 482          * must be done after double buffer stuff? */
 483 #ifdef OWN_WINDOW
 484         /* if (own_window) {
 485            set_transparent_background(window.window);
 486            XClearWindow(display, window.window);
 487            } */
 488 #endif
 489
 490         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 491 #ifdef OWN_WINDOW
 492                         | (own_window ? (StructureNotifyMask |
 493                                         ButtonPressMask | ButtonReleaseMask) : 0)
 494 #endif
 495                         );
 496 }
 497
 498 static Window find_subwindow(Window win, int w, int h)
 499 {
 500         unsigned int i, j;
 501         Window troot, parent, *children;
 502         unsigned int n;
 503
 504         /* search subwindows with same size as display or work area */
 505
 506         for (i = 0; i < 10; i++) {
 507                 XQueryTree(display, win, &troot, &parent, &children, &n);
 508
 509                 for (j = 0; j < n; j++) {
 510                         XWindowAttributes attrs;
 511
 512                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 513                                 /* Window must be mapped and same size as display or
 514                                  * work space */
 515                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 516                                                                 && attrs.height == display_height)
 517                                                         || (attrs.width == w && attrs.height == h))) {
 518                                         win = children[j];
 519                                         break;
 520                                 }
 521                         }
 522                 }
 523
 524                 XFree(children);
 525                 if (j == n) {
 526                         break;
 527                 }
 528         }
 529
 530         return win;
 531 }
 532
 533 long get_x11_color(const char *name)
 534 {
 535         XColor color;
 536
 537         color.pixel = 0;
 538         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 539                 /* lets check if it's a hex colour with the # missing in front
 540                  * if yes, then do something about it */
 541                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 542
 543                 newname[0] = '#';
 544                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 545                 /* now lets try again */
 546                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 547                                         &color)) {
 548                         NORM_ERR("can't parse X color '%s'", name);
 549                         return 0xFF00FF;
 550                 }
 551         }
 552         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 553                 NORM_ERR("can't allocate X color '%s'", name);
 554         }
 555
 556         return (long) color.pixel;
 557 }
 558
 559 void create_gc(void)
 560 {
 561         XGCValues values;
 562
 563         values.graphics_exposures = 0;
 564         values.function = GXcopy;
 565         window.gc = XCreateGC(display, window.drawable,
 566                         GCFunction | GCGraphicsExposures, &values);
 567 }
 568
 569 //Get current desktop number
 570 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 571 {
 572         Atom actual_type;
 573         int actual_format;
 574         unsigned long nitems;
 575         unsigned long bytes_after;
 576         unsigned char *prop = NULL;
 577         struct information *current_info = &info;
 578
 579         if (atom == None) return;
 580
 581         if ( (XGetWindowProperty( current_display, root, atom,
 582                                         0, 1L, False, XA_CARDINAL,
 583                                         &actual_type, &actual_format, &nitems,
 584                                         &bytes_after, &prop ) == Success ) &&
 585                         (actual_type == XA_CARDINAL) &&
 586                         (nitems == 1L) && (actual_format == 32) ) {
 587                 current_info->x11.desktop.current = prop[0]+1;
 588         }
 589         if(prop) {
 590                 XFree(prop);
 591         }
 592 }
 593
 594 //Get total number of available desktops
 595 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 596 {
 597         Atom actual_type;
 598         int actual_format;
 599         unsigned long nitems;
 600         unsigned long bytes_after;
 601         unsigned char *prop = NULL;
 602         struct information *current_info = &info;
 603
 604         if (atom == None) return;
 605
 606         if ( (XGetWindowProperty( current_display, root, atom,
 607                                         0, 1L, False, XA_CARDINAL,
 608                                         &actual_type, &actual_format, &nitems,
 609                                         &bytes_after, &prop ) == Success ) &&
 610                         (actual_type == XA_CARDINAL) &&
 611                         (nitems == 1L) && (actual_format == 32) ) {
 612                 current_info->x11.desktop.number = prop[0];
 613         }
 614         if(prop) {
 615                 XFree(prop);
 616         }
 617 }
 618
 619 //Get all desktop names
 620 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 621 {
 622         Atom actual_type;
 623         int actual_format;
 624         unsigned long nitems;
 625         unsigned long bytes_after;
 626         unsigned char *prop = NULL;
 627         struct information *current_info = &info;
 628
 629         if (atom == None) return;
 630
 631         if ( (XGetWindowProperty( current_display, root, atom,
 632                                         0, (~0L), False, ATOM(UTF8_STRING),
 633                                         &actual_type, &actual_format, &nitems,
 634                                         &bytes_after, &prop ) == Success ) &&
 635                         (actual_type == ATOM(UTF8_STRING)) &&
 636                         (nitems > 0L) && (actual_format == 8) ) {
 637
 638                 if(current_info->x11.desktop.all_names) {
 639                         free(current_info->x11.desktop.all_names);
 640                         current_info->x11.desktop.all_names = NULL;
 641                 }
 642                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 643                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 644                 current_info->x11.desktop.nitems = nitems;
 645         }
 646         if(prop) {
 647                 XFree(prop);
 648         }
 649 }
 650
 651 //Get current desktop name
 652 static inline void get_x11_desktop_current_name(char *names)
 653 {
 654         struct information *current_info = &info;
 655         unsigned int i = 0, j = 0;
 656         int k = 0;
 657
 658         while ( i < current_info->x11.desktop.nitems ) {
 659                 if ( names[i++] == '\0' ) {
 660                         if ( ++k == current_info->x11.desktop.current ) {
 661                                 if (current_info->x11.desktop.name) {
 662                                         free(current_info->x11.desktop.name);
 663                                         current_info->x11.desktop.name = NULL;
 664                                 }
 665                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 666                                 //desktop names can be empty but should always be not null
 667                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 668                                 break;
 669                         }
 670                         j = i;
 671                 }
 672         }
 673 }
 674
 675 void get_x11_desktop_info(Display *current_display, Atom atom)
 676 {
 677         Window root;
 678         static Atom atom_current, atom_number, atom_names;
 679         struct information *current_info = &info;
 680         XWindowAttributes window_attributes;
 681
 682         root = RootWindow(current_display, current_info->x11.monitor.current);
 683
 684         /* Check if we initialise else retrieve changed property */
 685         if (atom == 0) {
 686                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 687                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 688                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 689                 get_x11_desktop_current(current_display, root, atom_current);
 690                 get_x11_desktop_number(current_display, root, atom_number);
 691                 get_x11_desktop_names(current_display, root, atom_names);
 692                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 693
 694                 /* Set the PropertyChangeMask on the root window, if not set */
 695                 XGetWindowAttributes(display, root, &window_attributes);
 696                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 697                         XSetWindowAttributes attributes;
 698                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 699                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 700                         XGetWindowAttributes(display, root, &window_attributes);
 701                 }
 702         } else {
 703                 if (atom == atom_current) {
 704                         get_x11_desktop_current(current_display, root, atom_current);
 705                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 706                 } else if (atom == atom_number) {
 707                         get_x11_desktop_number(current_display, root, atom_number);
 708                 } else if (atom == atom_names) {
 709                         get_x11_desktop_names(current_display, root, atom_names);
 710                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 711                 }
 712         }
 713 }
 714
 715 void update_x11info(void)
 716 {
 717         struct information *current_info = &info;
 718         current_info->x11.monitor.number = XScreenCount(display);
 719         current_info->x11.monitor.current = XDefaultScreen(display);
 720 }
 721
 722 #ifdef OWN_WINDOW
 723 /* reserve window manager space */
 724 void set_struts(int sidenum)
 725 {
 726         Atom strut;
 727         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 728                 /* reserve space at left, right, top, bottom */
 729                 signed long sizes[12] = {0};
 730                 int i;
 731
 732                 /* define strut depth */
 733                 switch (sidenum) {
 734                         case 0:
 735                                 /* left side */
 736                                 sizes[0] = window.x + window.width;
 737                                 break;
 738                         case 1:
 739                                 /* right side */
 740                                 sizes[1] = display_width - window.x;
 741                                 break;
 742                         case 2:
 743                                 /* top side */
 744                                 sizes[2] = window.y + window.height;
 745                                 break;
 746                         case 3:
 747                                 /* bottom side */
 748                                 sizes[3] = display_height - window.y;
 749                                 break;
 750                 }
 751
 752                 /* define partial strut length */
 753                 if (sidenum <= 1) {
 754                         sizes[4 + (sidenum*2)] = window.y;
 755                         sizes[5 + (sidenum*2)] = window.y + window.height;
 756                 } else if (sidenum <= 3) {
 757                         sizes[4 + (sidenum*2)] = window.x;
 758                         sizes[5 + (sidenum*2)] = window.x + window.width;
 759                 }
 760
 761                 /* check constraints */
 762                 for (i = 0; i < 12; i++) {
 763                         if (sizes[i] < 0) {
 764                                 sizes[i] = 0;
 765                         } else {
 766                                 if (i <= 1 || i >= 8) {
 767                                         if (sizes[i] > display_width) {
 768                                                 sizes[i] = display_width;
 769                                         }
 770                                 } else {
 771                                         if (sizes[i] > display_height) {
 772                                                 sizes[i] = display_height;
 773                                         }
 774                                 }
 775                         }
 776                 }
 777
 778                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 779                                 PropModeReplace, (unsigned char *) &sizes, 4);
 780
 781                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 782                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 783                                         PropModeReplace, (unsigned char *) &sizes, 12);
 784                 }
 785         }
 786 }
 787 #endif /* OWN_WINDOW */