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

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