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 /* local prototypes */
  67 static void update_workarea(void);
  68 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  69 static Window find_subwindow(Window win, int w, int h);
  70
  71 /* X11 initializer */
  72 void init_X11(const char *disp)
  73 {
  74         if (!display) {
  75                 if ((display = XOpenDisplay(disp)) == NULL) {
  76                         CRIT_ERR(NULL, NULL, "can't open display: %s", XDisplayName(disp));
  77                 }
  78         }
  79
  80         screen = DefaultScreen(display);
  81         display_width = DisplayWidth(display, screen);
  82         display_height = DisplayHeight(display, screen);
  83
  84         get_x11_desktop_info(display, 0);
  85
  86         update_workarea();
  87 }
  88
  89 static void update_workarea(void)
  90 {
  91         /* default work area is display */
  92         workarea[0] = 0;
  93         workarea[1] = 0;
  94         workarea[2] = display_width;
  95         workarea[3] = display_height;
  96 }
  97
  98 /* Find root window and desktop window.
  99  * Return desktop window on success,
 100  * and set root and desktop byref return values.
 101  * Return 0 on failure. */
 102 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 103 {
 104         Atom type;
 105         int format, i;
 106         unsigned long nitems, bytes;
 107         unsigned int n;
 108         Window root = RootWindow(display, screen);
 109         Window win = root;
 110         Window troot, parent, *children;
 111         unsigned char *buf = NULL;
 112
 113         if (!p_root || !p_desktop) {
 114                 return 0;
 115         }
 116
 117         /* some window managers set __SWM_VROOT to some child of root window */
 118
 119         XQueryTree(display, root, &troot, &parent, &children, &n);
 120         for (i = 0; i < (int) n; i++) {
 121                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 122                                         False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 123                                 == Success && type == XA_WINDOW) {
 124                         win = *(Window *) buf;
 125                         XFree(buf);
 126                         XFree(children);
 127                         fprintf(stderr,
 128                                         PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 129                                         win);
 130                         fflush(stderr);
 131                         *p_root = win;
 132                         *p_desktop = win;
 133                         return win;
 134                 }
 135
 136                 if (buf) {
 137                         XFree(buf);
 138                         buf = 0;
 139                 }
 140         }
 141         XFree(children);
 142
 143         /* get subwindows from root */
 144         win = find_subwindow(root, -1, -1);
 145
 146         update_workarea();
 147
 148         win = find_subwindow(win, workarea[2], workarea[3]);
 149
 150         if (buf) {
 151                 XFree(buf);
 152                 buf = 0;
 153         }
 154
 155         if (win != root) {
 156                 fprintf(stderr,
 157                                 PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 158                                 win, root);
 159         } else {
 160                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 161         }
 162
 163         fflush(stderr);
 164
 165         *p_root = root;
 166         *p_desktop = win;
 167
 168         return win;
 169 }
 170
 171 /* sets background to ParentRelative for the Window and all parents */
 172 void set_transparent_background(Window win)
 173 {
 174         static int colour_set = -1;
 175
 176         if (set_transparent) {
 177                 Window parent = win;
 178                 unsigned int i;
 179
 180                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 181                         Window r, *children;
 182                         unsigned int n;
 183
 184                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 185
 186                         XQueryTree(display, parent, &r, &parent, &children, &n);
 187                         XFree(children);
 188                 }
 189         } else if (colour_set != background_colour) {
 190                 XSetWindowBackground(display, win, background_colour);
 191                 colour_set = background_colour;
 192         }
 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                 }
 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
 425 #endif /* OWN_WINDOW */
 426         {
 427                 XWindowAttributes attrs;
 428
 429                 if (!window.window) {
 430                         window.window = find_desktop_window(&window.root, &window.desktop);
 431                 }
 432
 433                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 434                         window.width = attrs.width;
 435                         window.height = attrs.height;
 436                 }
 437
 438                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 439         }
 440
 441         /* Drawable is same as window. This may be changed by double buffering. */
 442         window.drawable = window.window;
 443
 444 #ifdef HAVE_XDBE
 445         if (use_xdbe) {
 446                 int major, minor;
 447
 448                 if (!XdbeQueryExtension(display, &major, &minor)) {
 449                         use_xdbe = 0;
 450                 } else {
 451                         window.back_buffer = XdbeAllocateBackBufferName(display,
 452                                         window.window, XdbeBackground);
 453                         if (window.back_buffer != None) {
 454                                 window.drawable = window.back_buffer;
 455                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 456                         } else {
 457                                 use_xdbe = 0;
 458                         }
 459                 }
 460                 if (!use_xdbe) {
 461                         NORM_ERR("failed to set up double buffer");
 462                 }
 463         }
 464         if (!use_xdbe) {
 465                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 466         }
 467 #endif
 468         window.visual = DefaultVisual(display, DefaultScreen(display));
 469         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 470 #ifdef IMLIB2
 471         {
 472                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 473         }
 474 #endif /* IMLIB2 */
 475         XFlush(display);
 476
 477         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 478 #ifdef OWN_WINDOW
 479                         | (own_window ? (StructureNotifyMask |
 480                                         ButtonPressMask | ButtonReleaseMask) : 0)
 481 #endif
 482                         );
 483 }
 484
 485 static Window find_subwindow(Window win, int w, int h)
 486 {
 487         unsigned int i, j;
 488         Window troot, parent, *children;
 489         unsigned int n;
 490
 491         /* search subwindows with same size as display or work area */
 492
 493         for (i = 0; i < 10; i++) {
 494                 XQueryTree(display, win, &troot, &parent, &children, &n);
 495
 496                 for (j = 0; j < n; j++) {
 497                         XWindowAttributes attrs;
 498
 499                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 500                                 /* Window must be mapped and same size as display or
 501                                  * work space */
 502                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 503                                                                 && attrs.height == display_height)
 504                                                         || (attrs.width == w && attrs.height == h))) {
 505                                         win = children[j];
 506                                         break;
 507                                 }
 508                         }
 509                 }
 510
 511                 XFree(children);
 512                 if (j == n) {
 513                         break;
 514                 }
 515         }
 516
 517         return win;
 518 }
 519
 520 long get_x11_color(const char *name)
 521 {
 522         XColor color;
 523
 524         color.pixel = 0;
 525         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 526                 /* lets check if it's a hex colour with the # missing in front
 527                  * if yes, then do something about it */
 528                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 529
 530                 newname[0] = '#';
 531                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 532                 /* now lets try again */
 533                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 534                                         &color)) {
 535                         NORM_ERR("can't parse X color '%s'", name);
 536                         return 0xFF00FF;
 537                 }
 538         }
 539         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 540                 NORM_ERR("can't allocate X color '%s'", name);
 541         }
 542
 543         return (long) color.pixel;
 544 }
 545
 546 void create_gc(void)
 547 {
 548         XGCValues values;
 549
 550         values.graphics_exposures = 0;
 551         values.function = GXcopy;
 552         window.gc = XCreateGC(display, window.drawable,
 553                         GCFunction | GCGraphicsExposures, &values);
 554 }
 555
 556 //Get current desktop number
 557 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 558 {
 559         Atom actual_type;
 560         int actual_format;
 561         unsigned long nitems;
 562         unsigned long bytes_after;
 563         unsigned char *prop = NULL;
 564         struct information *current_info = &info;
 565
 566         if (atom == None) return;
 567
 568         if ( (XGetWindowProperty( current_display, root, atom,
 569                                         0, 1L, False, XA_CARDINAL,
 570                                         &actual_type, &actual_format, &nitems,
 571                                         &bytes_after, &prop ) == Success ) &&
 572                         (actual_type == XA_CARDINAL) &&
 573                         (nitems == 1L) && (actual_format == 32) ) {
 574                 current_info->x11.desktop.current = prop[0]+1;
 575         }
 576         if(prop) {
 577                 XFree(prop);
 578         }
 579 }
 580
 581 //Get total number of available desktops
 582 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 583 {
 584         Atom actual_type;
 585         int actual_format;
 586         unsigned long nitems;
 587         unsigned long bytes_after;
 588         unsigned char *prop = NULL;
 589         struct information *current_info = &info;
 590
 591         if (atom == None) return;
 592
 593         if ( (XGetWindowProperty( current_display, root, atom,
 594                                         0, 1L, False, XA_CARDINAL,
 595                                         &actual_type, &actual_format, &nitems,
 596                                         &bytes_after, &prop ) == Success ) &&
 597                         (actual_type == XA_CARDINAL) &&
 598                         (nitems == 1L) && (actual_format == 32) ) {
 599                 current_info->x11.desktop.number = prop[0];
 600         }
 601         if(prop) {
 602                 XFree(prop);
 603         }
 604 }
 605
 606 //Get all desktop names
 607 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 608 {
 609         Atom actual_type;
 610         int actual_format;
 611         unsigned long nitems;
 612         unsigned long bytes_after;
 613         unsigned char *prop = NULL;
 614         struct information *current_info = &info;
 615
 616         if (atom == None) return;
 617
 618         if ( (XGetWindowProperty( current_display, root, atom,
 619                                         0, (~0L), False, ATOM(UTF8_STRING),
 620                                         &actual_type, &actual_format, &nitems,
 621                                         &bytes_after, &prop ) == Success ) &&
 622                         (actual_type == ATOM(UTF8_STRING)) &&
 623                         (nitems > 0L) && (actual_format == 8) ) {
 624
 625                 if(current_info->x11.desktop.all_names) {
 626                         free(current_info->x11.desktop.all_names);
 627                         current_info->x11.desktop.all_names = NULL;
 628                 }
 629                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 630                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 631                 current_info->x11.desktop.nitems = nitems;
 632         }
 633         if(prop) {
 634                 XFree(prop);
 635         }
 636 }
 637
 638 //Get current desktop name
 639 static inline void get_x11_desktop_current_name(char *names)
 640 {
 641         struct information *current_info = &info;
 642         unsigned int i = 0, j = 0;
 643         int k = 0;
 644
 645         while ( i < current_info->x11.desktop.nitems ) {
 646                 if ( names[i++] == '\0' ) {
 647                         if ( ++k == current_info->x11.desktop.current ) {
 648                                 if (current_info->x11.desktop.name) {
 649                                         free(current_info->x11.desktop.name);
 650                                         current_info->x11.desktop.name = NULL;
 651                                 }
 652                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 653                                 //desktop names can be empty but should always be not null
 654                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 655                                 break;
 656                         }
 657                         j = i;
 658                 }
 659         }
 660 }
 661
 662 void get_x11_desktop_info(Display *current_display, Atom atom)
 663 {
 664         Window root;
 665         static Atom atom_current, atom_number, atom_names;
 666         struct information *current_info = &info;
 667         XWindowAttributes window_attributes;
 668
 669         root = RootWindow(current_display, current_info->x11.monitor.current);
 670
 671         /* Check if we initialise else retrieve changed property */
 672         if (atom == 0) {
 673                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 674                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 675                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 676                 get_x11_desktop_current(current_display, root, atom_current);
 677                 get_x11_desktop_number(current_display, root, atom_number);
 678                 get_x11_desktop_names(current_display, root, atom_names);
 679                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 680
 681                 /* Set the PropertyChangeMask on the root window, if not set */
 682                 XGetWindowAttributes(display, root, &window_attributes);
 683                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 684                         XSetWindowAttributes attributes;
 685                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 686                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 687                         XGetWindowAttributes(display, root, &window_attributes);
 688                 }
 689         } else {
 690                 if (atom == atom_current) {
 691                         get_x11_desktop_current(current_display, root, atom_current);
 692                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 693                 } else if (atom == atom_number) {
 694                         get_x11_desktop_number(current_display, root, atom_number);
 695                 } else if (atom == atom_names) {
 696                         get_x11_desktop_names(current_display, root, atom_names);
 697                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 698                 }
 699         }
 700 }
 701
 702 void update_x11info(void)
 703 {
 704         struct information *current_info = &info;
 705         current_info->x11.monitor.number = XScreenCount(display);
 706         current_info->x11.monitor.current = XDefaultScreen(display);
 707 }
 708
 709 #ifdef OWN_WINDOW
 710 /* reserve window manager space */
 711 void set_struts(int sidenum)
 712 {
 713         Atom strut;
 714         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 715                 /* reserve space at left, right, top, bottom */
 716                 signed long sizes[12] = {0};
 717                 int i;
 718
 719                 /* define strut depth */
 720                 switch (sidenum) {
 721                         case 0:
 722                                 /* left side */
 723                                 sizes[0] = window.x + window.width;
 724                                 break;
 725                         case 1:
 726                                 /* right side */
 727                                 sizes[1] = display_width - window.x;
 728                                 break;
 729                         case 2:
 730                                 /* top side */
 731                                 sizes[2] = window.y + window.height;
 732                                 break;
 733                         case 3:
 734                                 /* bottom side */
 735                                 sizes[3] = display_height - window.y;
 736                                 break;
 737                 }
 738
 739                 /* define partial strut length */
 740                 if (sidenum <= 1) {
 741                         sizes[4 + (sidenum*2)] = window.y;
 742                         sizes[5 + (sidenum*2)] = window.y + window.height;
 743                 } else if (sidenum <= 3) {
 744                         sizes[4 + (sidenum*2)] = window.x;
 745                         sizes[5 + (sidenum*2)] = window.x + window.width;
 746                 }
 747
 748                 /* check constraints */
 749                 for (i = 0; i < 12; i++) {
 750                         if (sizes[i] < 0) {
 751                                 sizes[i] = 0;
 752                         } else {
 753                                 if (i <= 1 || i >= 8) {
 754                                         if (sizes[i] > display_width) {
 755                                                 sizes[i] = display_width;
 756                                         }
 757                                 } else {
 758                                         if (sizes[i] > display_height) {
 759                                                 sizes[i] = display_height;
 760                                         }
 761                                 }
 762                         }
 763                 }
 764
 765                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 766                                 PropModeReplace, (unsigned char *) &sizes, 4);
 767
 768                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 769                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 770                                         PropModeReplace, (unsigned char *) &sizes, 12);
 771                 }
 772         }
 773 }
 774 #endif /* OWN_WINDOW */
 775
 776 #ifdef HAVE_XDBE
 777 void xdbe_swap_buffers(void)
 778 {
 779         if (use_xdbe) {
 780                 XdbeSwapInfo swap;
 781
 782                 swap.swap_window = window.window;
 783                 swap.swap_action = XdbeBackground;
 784                 XdbeSwapBuffers(display, &swap, 1);
 785         }
 786 }
 787 #endif /* HAVE_XDBE */
 788