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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  14  *      (see AUTHORS)
  15  * All rights reserved.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28  *
  29  */
  30
  31 #include "config.h"
  32 #include "conky.h"
  33 #include "logging.h"
  34 #include "common.h"
  35
  36 #include "x11.h"
  37 #include <X11/Xlib.h>
  38 #include <X11/Xatom.h>
  39 #include <X11/Xmd.h>
  40 #include <X11/Xutil.h>
  41 #ifdef IMLIB2
  42 #include "imlib2.h"
  43 #endif /* IMLIB2 */
  44
  45 #ifdef XFT
  46 #include <X11/Xft/Xft.h>
  47 int use_xft = 0;
  48 #endif
  49
  50 #ifdef HAVE_XDBE
  51 int use_xdbe;
  52 #endif
  53
  54 /* some basic X11 stuff */
  55 Display *display = NULL;
  56 int display_width;
  57 int display_height;
  58 int screen;
  59 static int set_transparent;
  60 static int background_colour;
  61
  62 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  63 int workarea[4];
  64
  65 /* Window stuff */
  66 struct conky_window window;
  67 char window_created = 0;
  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 }
 197
 198 void destroy_window(void)
 199 {
 200 #ifdef XFT
 201         if(window.xftdraw) {
 202                 XftDrawDestroy(window.xftdraw);
 203         }
 204 #endif
 205         if(window.gc) {
 206                 XFreeGC(display, window.gc);
 207         }
 208         memset(&window, 0, sizeof(struct conky_window));
 209 }
 210
 211 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 212                 char **argv, int argc)
 213 {
 214         /* There seems to be some problems with setting transparent background
 215          * (on fluxbox this time). It doesn't happen always and I don't know why it
 216          * happens but I bet the bug is somewhere here. */
 217         set_transparent = set_trans;
 218         background_colour = back_colour;
 219         window_created = 1;
 220
 221 #ifdef OWN_WINDOW
 222         if (own_window) {
 223                 if (!find_desktop_window(&window.root, &window.desktop)) {
 224                         return;
 225                 }
 226
 227                 if (window.type == TYPE_OVERRIDE) {
 228
 229                         /* An override_redirect True window.
 230                          * No WM hints or button processing needed. */
 231                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 232                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 233                                 True, 0, 0 };
 234
 235                         /* Parent is desktop window (which might be a child of root) */
 236                         window.window = XCreateWindow(display, window.desktop, window.x,
 237                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 238                                         CWBackPixel | CWOverrideRedirect, &attrs);
 239
 240                         XLowerWindow(display, window.window);
 241
 242                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 243                         fflush(stderr);
 244                 } else { /* window.type != TYPE_OVERRIDE */
 245
 246                         /* A window managed by the window manager.
 247                          * Process hints and buttons. */
 248                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 249                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 250                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 251
 252                         XClassHint classHint;
 253                         XWMHints wmHint;
 254                         Atom xa;
 255
 256                         if (window.type == TYPE_DOCK) {
 257                                 window.x = window.y = 0;
 258                         }
 259                         /* Parent is root window so WM can take control */
 260                         window.window = XCreateWindow(display, window.root, window.x,
 261                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 262                                         CWBackPixel | CWOverrideRedirect, &attrs);
 263
 264                         classHint.res_name = window.class_name;
 265                         classHint.res_class = classHint.res_name;
 266
 267                         wmHint.flags = InputHint | StateHint;
 268                         /* allow decorated windows to be given input focus by WM */
 269                         wmHint.input =
 270                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 271                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 272                                 wmHint.initial_state = WithdrawnState;
 273                         } else {
 274                                 wmHint.initial_state = NormalState;
 275                         }
 276
 277                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 278                                         argc, NULL, &wmHint, &classHint);
 279
 280                         /* Sets an empty WM_PROTOCOLS property */
 281                         XSetWMProtocols(display, window.window, NULL, 0);
 282
 283                         /* Set window type */
 284                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 285                                 Atom prop;
 286
 287                                 switch (window.type) {
 288                                         case TYPE_DESKTOP:
 289                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 290                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 291                                                 fflush(stderr);
 292                                                 break;
 293                                         case TYPE_DOCK:
 294                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 295                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 296                                                 fflush(stderr);
 297                                                 break;
 298                                         case TYPE_PANEL:
 299                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 300                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 301                                                 fflush(stderr);
 302                                                 break;
 303                                         case TYPE_NORMAL:
 304                                         default:
 305                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 306                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 307                                                 fflush(stderr);
 308                                                 break;
 309                                 }
 310                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 311                                                 PropModeReplace, (unsigned char *) &prop, 1);
 312                         }
 313
 314                         /* Set desired hints */
 315
 316                         /* Window decorations */
 317                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 318                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 319                                    fflush(stderr); */
 320
 321                                 xa = ATOM(_MOTIF_WM_HINTS);
 322                                 if (xa != None) {
 323                                         long prop[5] = { 2, 0, 0, 0, 0 };
 324                                         XChangeProperty(display, window.window, xa, xa, 32,
 325                                                         PropModeReplace, (unsigned char *) prop, 5);
 326                                 }
 327                         }
 328
 329                         /* Below other windows */
 330                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 331                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 332                                    fflush(stderr); */
 333
 334                                 xa = ATOM(_WIN_LAYER);
 335                                 if (xa != None) {
 336                                         long prop = 0;
 337
 338                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 339                                                         PropModeAppend, (unsigned char *) &prop, 1);
 340                                 }
 341
 342                                 xa = ATOM(_NET_WM_STATE);
 343                                 if (xa != None) {
 344                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 345
 346                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 347                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 348                                 }
 349                         }
 350
 351                         /* Above other windows */
 352                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 353                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 354                                    fflush(stderr); */
 355
 356                                 xa = ATOM(_WIN_LAYER);
 357                                 if (xa != None) {
 358                                         long prop = 6;
 359
 360                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 361                                                         PropModeAppend, (unsigned char *) &prop, 1);
 362                                 }
 363
 364                                 xa = ATOM(_NET_WM_STATE);
 365                                 if (xa != None) {
 366                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 367
 368                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 369                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 370                                 }
 371                         }
 372
 373                         /* Sticky */
 374                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 375                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 376                                    fflush(stderr); */
 377
 378                                 xa = ATOM(_NET_WM_DESKTOP);
 379                                 if (xa != None) {
 380                                         CARD32 xa_prop = 0xFFFFFFFF;
 381
 382                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 383                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 384                                 }
 385
 386                                 xa = ATOM(_NET_WM_STATE);
 387                                 if (xa != None) {
 388                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 389
 390                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 391                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 392                                 }
 393                         }
 394
 395                         /* Skip taskbar */
 396                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 397                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 398                                    fflush(stderr); */
 399
 400                                 xa = ATOM(_NET_WM_STATE);
 401                                 if (xa != None) {
 402                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 403
 404                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 405                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 406                                 }
 407                         }
 408
 409                         /* Skip pager */
 410                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 411                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 412                                    fflush(stderr); */
 413
 414                                 xa = ATOM(_NET_WM_STATE);
 415                                 if (xa != None) {
 416                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 417
 418                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 419                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 420                                 }
 421                         }
 422                 }
 423
 424                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 425                                 window.window);
 426                 fflush(stderr);
 427
 428                 XMapWindow(display, window.window);
 429
 430         } else
 431 #endif /* OWN_WINDOW */
 432         {
 433                 XWindowAttributes attrs;
 434
 435                 if (!window.window) {
 436                         window.window = find_desktop_window(&window.root, &window.desktop);
 437                 }
 438
 439                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 440                         window.width = attrs.width;
 441                         window.height = attrs.height;
 442                 }
 443
 444                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 445         }
 446
 447         /* Drawable is same as window. This may be changed by double buffering. */
 448         window.drawable = window.window;
 449
 450 #ifdef HAVE_XDBE
 451         if (use_xdbe) {
 452                 int major, minor;
 453
 454                 if (!XdbeQueryExtension(display, &major, &minor)) {
 455                         use_xdbe = 0;
 456                 } else {
 457                         window.back_buffer = XdbeAllocateBackBufferName(display,
 458                                         window.window, XdbeBackground);
 459                         if (window.back_buffer != None) {
 460                                 window.drawable = window.back_buffer;
 461                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 462                         } else {
 463                                 use_xdbe = 0;
 464                         }
 465                 }
 466                 if (!use_xdbe) {
 467                         NORM_ERR("failed to set up double buffer");
 468                 }
 469         }
 470         if (!use_xdbe) {
 471                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 472         }
 473 #endif
 474         window.visual = DefaultVisual(display, DefaultScreen(display));
 475         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 476 #ifdef IMLIB2
 477         {
 478                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 479         }
 480 #endif /* IMLIB2 */
 481         XFlush(display);
 482
 483         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 484 #ifdef OWN_WINDOW
 485                         | (own_window ? (StructureNotifyMask |
 486                                         ButtonPressMask | ButtonReleaseMask) : 0)
 487 #endif
 488                         );
 489 }
 490
 491 static Window find_subwindow(Window win, int w, int h)
 492 {
 493         unsigned int i, j;
 494         Window troot, parent, *children;
 495         unsigned int n;
 496
 497         /* search subwindows with same size as display or work area */
 498
 499         for (i = 0; i < 10; i++) {
 500                 XQueryTree(display, win, &troot, &parent, &children, &n);
 501
 502                 for (j = 0; j < n; j++) {
 503                         XWindowAttributes attrs;
 504
 505                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 506                                 /* Window must be mapped and same size as display or
 507                                  * work space */
 508                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 509                                                                 && attrs.height == display_height)
 510                                                         || (attrs.width == w && attrs.height == h))) {
 511                                         win = children[j];
 512                                         break;
 513                                 }
 514                         }
 515                 }
 516
 517                 XFree(children);
 518                 if (j == n) {
 519                         break;
 520                 }
 521         }
 522
 523         return win;
 524 }
 525
 526 long get_x11_color(const char *name)
 527 {
 528         XColor color;
 529
 530         color.pixel = 0;
 531         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 532                 /* lets check if it's a hex colour with the # missing in front
 533                  * if yes, then do something about it */
 534                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 535
 536                 newname[0] = '#';
 537                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 538                 /* now lets try again */
 539                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 540                                         &color)) {
 541                         NORM_ERR("can't parse X color '%s'", name);
 542                         return 0xFF00FF;
 543                 }
 544         }
 545         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 546                 NORM_ERR("can't allocate X color '%s'", name);
 547         }
 548
 549         return (long) color.pixel;
 550 }
 551
 552 void create_gc(void)
 553 {
 554         XGCValues values;
 555
 556         values.graphics_exposures = 0;
 557         values.function = GXcopy;
 558         window.gc = XCreateGC(display, window.drawable,
 559                         GCFunction | GCGraphicsExposures, &values);
 560 }
 561
 562 //Get current desktop number
 563 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 564 {
 565         Atom actual_type;
 566         int actual_format;
 567         unsigned long nitems;
 568         unsigned long bytes_after;
 569         unsigned char *prop = NULL;
 570         struct information *current_info = &info;
 571
 572         if (atom == None) return;
 573
 574         if ( (XGetWindowProperty( current_display, root, atom,
 575                                         0, 1L, False, XA_CARDINAL,
 576                                         &actual_type, &actual_format, &nitems,
 577                                         &bytes_after, &prop ) == Success ) &&
 578                         (actual_type == XA_CARDINAL) &&
 579                         (nitems == 1L) && (actual_format == 32) ) {
 580                 current_info->x11.desktop.current = prop[0]+1;
 581         }
 582         if(prop) {
 583                 XFree(prop);
 584         }
 585 }
 586
 587 //Get total number of available desktops
 588 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 589 {
 590         Atom actual_type;
 591         int actual_format;
 592         unsigned long nitems;
 593         unsigned long bytes_after;
 594         unsigned char *prop = NULL;
 595         struct information *current_info = &info;
 596
 597         if (atom == None) return;
 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 (atom == None) return;
 623
 624         if ( (XGetWindowProperty( current_display, root, atom,
 625                                         0, (~0L), False, ATOM(UTF8_STRING),
 626                                         &actual_type, &actual_format, &nitems,
 627                                         &bytes_after, &prop ) == Success ) &&
 628                         (actual_type == ATOM(UTF8_STRING)) &&
 629                         (nitems > 0L) && (actual_format == 8) ) {
 630
 631                 if(current_info->x11.desktop.all_names) {
 632                         free(current_info->x11.desktop.all_names);
 633                         current_info->x11.desktop.all_names = NULL;
 634                 }
 635                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 636                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 637                 current_info->x11.desktop.nitems = nitems;
 638         }
 639         if(prop) {
 640                 XFree(prop);
 641         }
 642 }
 643
 644 //Get current desktop name
 645 static inline void get_x11_desktop_current_name(char *names)
 646 {
 647         struct information *current_info = &info;
 648         unsigned int i = 0, j = 0;
 649         int k = 0;
 650
 651         while ( i < current_info->x11.desktop.nitems ) {
 652                 if ( names[i++] == '\0' ) {
 653                         if ( ++k == current_info->x11.desktop.current ) {
 654                                 if (current_info->x11.desktop.name) {
 655                                         free(current_info->x11.desktop.name);
 656                                         current_info->x11.desktop.name = NULL;
 657                                 }
 658                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 659                                 //desktop names can be empty but should always be not null
 660                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 661                                 break;
 662                         }
 663                         j = i;
 664                 }
 665         }
 666 }
 667
 668 void get_x11_desktop_info(Display *current_display, Atom atom)
 669 {
 670         Window root;
 671         static Atom atom_current, atom_number, atom_names;
 672         struct information *current_info = &info;
 673         XWindowAttributes window_attributes;
 674
 675         root = RootWindow(current_display, current_info->x11.monitor.current);
 676
 677         /* Check if we initialise else retrieve changed property */
 678         if (atom == 0) {
 679                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 680                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 681                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 682                 get_x11_desktop_current(current_display, root, atom_current);
 683                 get_x11_desktop_number(current_display, root, atom_number);
 684                 get_x11_desktop_names(current_display, root, atom_names);
 685                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 686
 687                 /* Set the PropertyChangeMask on the root window, if not set */
 688                 XGetWindowAttributes(display, root, &window_attributes);
 689                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 690                         XSetWindowAttributes attributes;
 691                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 692                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 693                         XGetWindowAttributes(display, root, &window_attributes);
 694                 }
 695         } else {
 696                 if (atom == atom_current) {
 697                         get_x11_desktop_current(current_display, root, atom_current);
 698                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 699                 } else if (atom == atom_number) {
 700                         get_x11_desktop_number(current_display, root, atom_number);
 701                 } else if (atom == atom_names) {
 702                         get_x11_desktop_names(current_display, root, atom_names);
 703                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 704                 }
 705         }
 706 }
 707
 708 void update_x11info(void)
 709 {
 710         struct information *current_info = &info;
 711         if (!x_initialised == YES)
 712                 return;
 713         current_info->x11.monitor.number = XScreenCount(display);
 714         current_info->x11.monitor.current = XDefaultScreen(display);
 715 }
 716
 717 #ifdef OWN_WINDOW
 718 /* reserve window manager space */
 719 void set_struts(int sidenum)
 720 {
 721         Atom strut;
 722         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 723                 /* reserve space at left, right, top, bottom */
 724                 signed long sizes[12] = {0};
 725                 int i;
 726
 727                 /* define strut depth */
 728                 switch (sidenum) {
 729                         case 0:
 730                                 /* left side */
 731                                 sizes[0] = window.x + window.width;
 732                                 break;
 733                         case 1:
 734                                 /* right side */
 735                                 sizes[1] = display_width - window.x;
 736                                 break;
 737                         case 2:
 738                                 /* top side */
 739                                 sizes[2] = window.y + window.height;
 740                                 break;
 741                         case 3:
 742                                 /* bottom side */
 743                                 sizes[3] = display_height - window.y;
 744                                 break;
 745                 }
 746
 747                 /* define partial strut length */
 748                 if (sidenum <= 1) {
 749                         sizes[4 + (sidenum*2)] = window.y;
 750                         sizes[5 + (sidenum*2)] = window.y + window.height;
 751                 } else if (sidenum <= 3) {
 752                         sizes[4 + (sidenum*2)] = window.x;
 753                         sizes[5 + (sidenum*2)] = window.x + window.width;
 754                 }
 755
 756                 /* check constraints */
 757                 for (i = 0; i < 12; i++) {
 758                         if (sizes[i] < 0) {
 759                                 sizes[i] = 0;
 760                         } else {
 761                                 if (i <= 1 || i >= 8) {
 762                                         if (sizes[i] > display_width) {
 763                                                 sizes[i] = display_width;
 764                                         }
 765                                 } else {
 766                                         if (sizes[i] > display_height) {
 767                                                 sizes[i] = display_height;
 768                                         }
 769                                 }
 770                         }
 771                 }
 772
 773                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 774                                 PropModeReplace, (unsigned char *) &sizes, 4);
 775
 776                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 777                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 778                                         PropModeReplace, (unsigned char *) &sizes, 12);
 779                 }
 780         }
 781 }
 782 #endif /* OWN_WINDOW */
 783
 784 #ifdef HAVE_XDBE
 785 void xdbe_swap_buffers(void)
 786 {
 787         if (use_xdbe) {
 788                 XdbeSwapInfo swap;
 789
 790                 swap.swap_window = window.window;
 791                 swap.swap_action = XdbeBackground;
 792                 XdbeSwapBuffers(display, &swap, 1);
 793         }
 794 }
 795 #endif /* HAVE_XDBE */
 796