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, NULL, NULL, argv,
 278                                         argc, NULL, &wmHint, &classHint);
 279                         XStoreName(display, window.window, window.title);
 280
 281                         /* Sets an empty WM_PROTOCOLS property */
 282                         XSetWMProtocols(display, window.window, NULL, 0);
 283
 284                         /* Set window type */
 285                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 286                                 Atom prop;
 287
 288                                 switch (window.type) {
 289                                         case TYPE_DESKTOP:
 290                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 291                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 292                                                 fflush(stderr);
 293                                                 break;
 294                                         case TYPE_DOCK:
 295                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 296                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 297                                                 fflush(stderr);
 298                                                 break;
 299                                         case TYPE_PANEL:
 300                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 301                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 302                                                 fflush(stderr);
 303                                                 break;
 304                                         case TYPE_NORMAL:
 305                                         default:
 306                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 307                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 308                                                 fflush(stderr);
 309                                                 break;
 310                                 }
 311                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 312                                                 PropModeReplace, (unsigned char *) &prop, 1);
 313                         }
 314
 315                         /* Set desired hints */
 316
 317                         /* Window decorations */
 318                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 319                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 320                                    fflush(stderr); */
 321
 322                                 xa = ATOM(_MOTIF_WM_HINTS);
 323                                 if (xa != None) {
 324                                         long prop[5] = { 2, 0, 0, 0, 0 };
 325                                         XChangeProperty(display, window.window, xa, xa, 32,
 326                                                         PropModeReplace, (unsigned char *) prop, 5);
 327                                 }
 328                         }
 329
 330                         /* Below other windows */
 331                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 332                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 333                                    fflush(stderr); */
 334
 335                                 xa = ATOM(_WIN_LAYER);
 336                                 if (xa != None) {
 337                                         long prop = 0;
 338
 339                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 340                                                         PropModeAppend, (unsigned char *) &prop, 1);
 341                                 }
 342
 343                                 xa = ATOM(_NET_WM_STATE);
 344                                 if (xa != None) {
 345                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 346
 347                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 348                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 349                                 }
 350                         }
 351
 352                         /* Above other windows */
 353                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 354                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 355                                    fflush(stderr); */
 356
 357                                 xa = ATOM(_WIN_LAYER);
 358                                 if (xa != None) {
 359                                         long prop = 6;
 360
 361                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 362                                                         PropModeAppend, (unsigned char *) &prop, 1);
 363                                 }
 364
 365                                 xa = ATOM(_NET_WM_STATE);
 366                                 if (xa != None) {
 367                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 368
 369                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 370                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 371                                 }
 372                         }
 373
 374                         /* Sticky */
 375                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 376                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 377                                    fflush(stderr); */
 378
 379                                 xa = ATOM(_NET_WM_DESKTOP);
 380                                 if (xa != None) {
 381                                         CARD32 xa_prop = 0xFFFFFFFF;
 382
 383                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 384                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 385                                 }
 386
 387                                 xa = ATOM(_NET_WM_STATE);
 388                                 if (xa != None) {
 389                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 390
 391                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 392                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 393                                 }
 394                         }
 395
 396                         /* Skip taskbar */
 397                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 398                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 399                                    fflush(stderr); */
 400
 401                                 xa = ATOM(_NET_WM_STATE);
 402                                 if (xa != None) {
 403                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 404
 405                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 406                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 407                                 }
 408                         }
 409
 410                         /* Skip pager */
 411                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 412                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 413                                    fflush(stderr); */
 414
 415                                 xa = ATOM(_NET_WM_STATE);
 416                                 if (xa != None) {
 417                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 418
 419                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 420                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 421                                 }
 422                         }
 423                 }
 424
 425                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 426                                 window.window);
 427                 fflush(stderr);
 428
 429                 XMapWindow(display, window.window);
 430
 431         } else
 432 #endif /* OWN_WINDOW */
 433         {
 434                 XWindowAttributes attrs;
 435
 436                 if (!window.window) {
 437                         window.window = find_desktop_window(&window.root, &window.desktop);
 438                 }
 439
 440                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 441                         window.width = attrs.width;
 442                         window.height = attrs.height;
 443                 }
 444
 445                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 446         }
 447
 448         /* Drawable is same as window. This may be changed by double buffering. */
 449         window.drawable = window.window;
 450
 451 #ifdef HAVE_XDBE
 452         if (use_xdbe) {
 453                 int major, minor;
 454
 455                 if (!XdbeQueryExtension(display, &major, &minor)) {
 456                         use_xdbe = 0;
 457                 } else {
 458                         window.back_buffer = XdbeAllocateBackBufferName(display,
 459                                         window.window, XdbeBackground);
 460                         if (window.back_buffer != None) {
 461                                 window.drawable = window.back_buffer;
 462                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 463                         } else {
 464                                 use_xdbe = 0;
 465                         }
 466                 }
 467                 if (!use_xdbe) {
 468                         NORM_ERR("failed to set up double buffer");
 469                 }
 470         }
 471         if (!use_xdbe) {
 472                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 473         }
 474 #endif
 475         window.visual = DefaultVisual(display, DefaultScreen(display));
 476         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 477 #ifdef IMLIB2
 478         {
 479                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 480         }
 481 #endif /* IMLIB2 */
 482         XFlush(display);
 483
 484         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 485 #ifdef OWN_WINDOW
 486                         | (own_window ? (StructureNotifyMask |
 487                                         ButtonPressMask | ButtonReleaseMask) : 0)
 488 #endif
 489                         );
 490 }
 491
 492 static Window find_subwindow(Window win, int w, int h)
 493 {
 494         unsigned int i, j;
 495         Window troot, parent, *children;
 496         unsigned int n;
 497
 498         /* search subwindows with same size as display or work area */
 499
 500         for (i = 0; i < 10; i++) {
 501                 XQueryTree(display, win, &troot, &parent, &children, &n);
 502
 503                 for (j = 0; j < n; j++) {
 504                         XWindowAttributes attrs;
 505
 506                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 507                                 /* Window must be mapped and same size as display or
 508                                  * work space */
 509                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 510                                                                 && attrs.height == display_height)
 511                                                         || (attrs.width == w && attrs.height == h))) {
 512                                         win = children[j];
 513                                         break;
 514                                 }
 515                         }
 516                 }
 517
 518                 XFree(children);
 519                 if (j == n) {
 520                         break;
 521                 }
 522         }
 523
 524         return win;
 525 }
 526
 527 long get_x11_color(const char *name)
 528 {
 529         XColor color;
 530
 531         color.pixel = 0;
 532         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 533                 /* lets check if it's a hex colour with the # missing in front
 534                  * if yes, then do something about it */
 535                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 536
 537                 newname[0] = '#';
 538                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 539                 /* now lets try again */
 540                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 541                                         &color)) {
 542                         NORM_ERR("can't parse X color '%s'", name);
 543                         return 0xFF00FF;
 544                 }
 545         }
 546         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 547                 NORM_ERR("can't allocate X color '%s'", name);
 548         }
 549
 550         return (long) color.pixel;
 551 }
 552
 553 void create_gc(void)
 554 {
 555         XGCValues values;
 556
 557         values.graphics_exposures = 0;
 558         values.function = GXcopy;
 559         window.gc = XCreateGC(display, window.drawable,
 560                         GCFunction | GCGraphicsExposures, &values);
 561 }
 562
 563 //Get current desktop number
 564 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 565 {
 566         Atom actual_type;
 567         int actual_format;
 568         unsigned long nitems;
 569         unsigned long bytes_after;
 570         unsigned char *prop = NULL;
 571         struct information *current_info = &info;
 572
 573         if (atom == None) return;
 574
 575         if ( (XGetWindowProperty( current_display, root, atom,
 576                                         0, 1L, False, XA_CARDINAL,
 577                                         &actual_type, &actual_format, &nitems,
 578                                         &bytes_after, &prop ) == Success ) &&
 579                         (actual_type == XA_CARDINAL) &&
 580                         (nitems == 1L) && (actual_format == 32) ) {
 581                 current_info->x11.desktop.current = prop[0]+1;
 582         }
 583         if(prop) {
 584                 XFree(prop);
 585         }
 586 }
 587
 588 //Get total number of available desktops
 589 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 590 {
 591         Atom actual_type;
 592         int actual_format;
 593         unsigned long nitems;
 594         unsigned long bytes_after;
 595         unsigned char *prop = NULL;
 596         struct information *current_info = &info;
 597
 598         if (atom == None) return;
 599
 600         if ( (XGetWindowProperty( current_display, root, atom,
 601                                         0, 1L, False, XA_CARDINAL,
 602                                         &actual_type, &actual_format, &nitems,
 603                                         &bytes_after, &prop ) == Success ) &&
 604                         (actual_type == XA_CARDINAL) &&
 605                         (nitems == 1L) && (actual_format == 32) ) {
 606                 current_info->x11.desktop.number = prop[0];
 607         }
 608         if(prop) {
 609                 XFree(prop);
 610         }
 611 }
 612
 613 //Get all desktop names
 614 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 615 {
 616         Atom actual_type;
 617         int actual_format;
 618         unsigned long nitems;
 619         unsigned long bytes_after;
 620         unsigned char *prop = NULL;
 621         struct information *current_info = &info;
 622
 623         if (atom == None) return;
 624
 625         if ( (XGetWindowProperty( current_display, root, atom,
 626                                         0, (~0L), False, ATOM(UTF8_STRING),
 627                                         &actual_type, &actual_format, &nitems,
 628                                         &bytes_after, &prop ) == Success ) &&
 629                         (actual_type == ATOM(UTF8_STRING)) &&
 630                         (nitems > 0L) && (actual_format == 8) ) {
 631
 632                 if(current_info->x11.desktop.all_names) {
 633                         free(current_info->x11.desktop.all_names);
 634                         current_info->x11.desktop.all_names = NULL;
 635                 }
 636                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 637                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 638                 current_info->x11.desktop.nitems = nitems;
 639         }
 640         if(prop) {
 641                 XFree(prop);
 642         }
 643 }
 644
 645 //Get current desktop name
 646 static inline void get_x11_desktop_current_name(char *names)
 647 {
 648         struct information *current_info = &info;
 649         unsigned int i = 0, j = 0;
 650         int k = 0;
 651
 652         while ( i < current_info->x11.desktop.nitems ) {
 653                 if ( names[i++] == '\0' ) {
 654                         if ( ++k == current_info->x11.desktop.current ) {
 655                                 if (current_info->x11.desktop.name) {
 656                                         free(current_info->x11.desktop.name);
 657                                         current_info->x11.desktop.name = NULL;
 658                                 }
 659                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 660                                 //desktop names can be empty but should always be not null
 661                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 662                                 break;
 663                         }
 664                         j = i;
 665                 }
 666         }
 667 }
 668
 669 void get_x11_desktop_info(Display *current_display, Atom atom)
 670 {
 671         Window root;
 672         static Atom atom_current, atom_number, atom_names;
 673         struct information *current_info = &info;
 674         XWindowAttributes window_attributes;
 675
 676         root = RootWindow(current_display, current_info->x11.monitor.current);
 677
 678         /* Check if we initialise else retrieve changed property */
 679         if (atom == 0) {
 680                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 681                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 682                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 683                 get_x11_desktop_current(current_display, root, atom_current);
 684                 get_x11_desktop_number(current_display, root, atom_number);
 685                 get_x11_desktop_names(current_display, root, atom_names);
 686                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 687
 688                 /* Set the PropertyChangeMask on the root window, if not set */
 689                 XGetWindowAttributes(display, root, &window_attributes);
 690                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 691                         XSetWindowAttributes attributes;
 692                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 693                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 694                         XGetWindowAttributes(display, root, &window_attributes);
 695                 }
 696         } else {
 697                 if (atom == atom_current) {
 698                         get_x11_desktop_current(current_display, root, atom_current);
 699                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 700                 } else if (atom == atom_number) {
 701                         get_x11_desktop_number(current_display, root, atom_number);
 702                 } else if (atom == atom_names) {
 703                         get_x11_desktop_names(current_display, root, atom_names);
 704                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 705                 }
 706         }
 707 }
 708
 709 void update_x11info(void)
 710 {
 711         struct information *current_info = &info;
 712         if (!x_initialised == YES)
 713                 return;
 714         current_info->x11.monitor.number = XScreenCount(display);
 715         current_info->x11.monitor.current = XDefaultScreen(display);
 716 }
 717
 718 #ifdef OWN_WINDOW
 719 /* reserve window manager space */
 720 void set_struts(int sidenum)
 721 {
 722         Atom strut;
 723         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 724                 /* reserve space at left, right, top, bottom */
 725                 signed long sizes[12] = {0};
 726                 int i;
 727
 728                 /* define strut depth */
 729                 switch (sidenum) {
 730                         case 0:
 731                                 /* left side */
 732                                 sizes[0] = window.x + window.width;
 733                                 break;
 734                         case 1:
 735                                 /* right side */
 736                                 sizes[1] = display_width - window.x;
 737                                 break;
 738                         case 2:
 739                                 /* top side */
 740                                 sizes[2] = window.y + window.height;
 741                                 break;
 742                         case 3:
 743                                 /* bottom side */
 744                                 sizes[3] = display_height - window.y;
 745                                 break;
 746                 }
 747
 748                 /* define partial strut length */
 749                 if (sidenum <= 1) {
 750                         sizes[4 + (sidenum*2)] = window.y;
 751                         sizes[5 + (sidenum*2)] = window.y + window.height;
 752                 } else if (sidenum <= 3) {
 753                         sizes[4 + (sidenum*2)] = window.x;
 754                         sizes[5 + (sidenum*2)] = window.x + window.width;
 755                 }
 756
 757                 /* check constraints */
 758                 for (i = 0; i < 12; i++) {
 759                         if (sizes[i] < 0) {
 760                                 sizes[i] = 0;
 761                         } else {
 762                                 if (i <= 1 || i >= 8) {
 763                                         if (sizes[i] > display_width) {
 764                                                 sizes[i] = display_width;
 765                                         }
 766                                 } else {
 767                                         if (sizes[i] > display_height) {
 768                                                 sizes[i] = display_height;
 769                                         }
 770                                 }
 771                         }
 772                 }
 773
 774                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 775                                 PropModeReplace, (unsigned char *) &sizes, 4);
 776
 777                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 778                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 779                                         PropModeReplace, (unsigned char *) &sizes, 12);
 780                 }
 781         }
 782 }
 783 #endif /* OWN_WINDOW */
 784
 785 #ifdef HAVE_XDBE
 786 void xdbe_swap_buffers(void)
 787 {
 788         if (use_xdbe) {
 789                 XdbeSwapInfo swap;
 790
 791                 swap.swap_window = window.window;
 792                 swap.swap_action = XdbeBackground;
 793                 XdbeSwapBuffers(display, &swap, 1);
 794         }
 795 }
 796 #endif /* HAVE_XDBE */
 797