git.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) 2005-2010 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;
  48 #endif
  49
  50 #ifdef HAVE_XDBE
  51 int use_xdbe;
  52 #endif
  53
  54 #ifdef USE_ARGB
  55 int use_argb_visual;
  56 int have_argb_visual;
  57 #endif /* USE_ARGB */
  58 int own_window_argb_value;
  59
  60 /* some basic X11 stuff */
  61 Display *display = NULL;
  62 int display_width;
  63 int display_height;
  64 int screen;
  65 static int set_transparent;
  66 static int background_colour;
  67
  68 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  69 int workarea[4];
  70
  71 /* Window stuff */
  72 struct conky_window window;
  73 char window_created = 0;
  74
  75 /* local prototypes */
  76 static void update_workarea(void);
  77 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  78 static Window find_subwindow(Window win, int w, int h);
  79
  80 /* X11 initializer */
  81 void init_X11(const char *disp)
  82 {
  83         if (!display) {
  84                 if ((display = XOpenDisplay(disp)) == NULL) {
  85                         CRIT_ERR(NULL, NULL, "can't open display: %s", XDisplayName(disp));
  86                 }
  87         }
  88
  89         screen = DefaultScreen(display);
  90         display_width = DisplayWidth(display, screen);
  91         display_height = DisplayHeight(display, screen);
  92
  93         get_x11_desktop_info(display, 0);
  94
  95         update_workarea();
  96 }
  97
  98 static void update_workarea(void)
  99 {
 100         /* default work area is display */
 101         workarea[0] = 0;
 102         workarea[1] = 0;
 103         workarea[2] = display_width;
 104         workarea[3] = display_height;
 105 }
 106
 107 /* Find root window and desktop window.
 108  * Return desktop window on success,
 109  * and set root and desktop byref return values.
 110  * Return 0 on failure. */
 111 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 112 {
 113         Atom type;
 114         int format, i;
 115         unsigned long nitems, bytes;
 116         unsigned int n;
 117         Window root = RootWindow(display, screen);
 118         Window win = root;
 119         Window troot, parent, *children;
 120         unsigned char *buf = NULL;
 121
 122         if (!p_root || !p_desktop) {
 123                 return 0;
 124         }
 125
 126         /* some window managers set __SWM_VROOT to some child of root window */
 127
 128         XQueryTree(display, root, &troot, &parent, &children, &n);
 129         for (i = 0; i < (int) n; i++) {
 130                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 131                                         False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 132                                 == Success && type == XA_WINDOW) {
 133                         win = *(Window *) buf;
 134                         XFree(buf);
 135                         XFree(children);
 136                         fprintf(stderr,
 137                                         PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 138                                         win);
 139                         fflush(stderr);
 140                         *p_root = win;
 141                         *p_desktop = win;
 142                         return win;
 143                 }
 144
 145                 if (buf) {
 146                         XFree(buf);
 147                         buf = 0;
 148                 }
 149         }
 150         XFree(children);
 151
 152         /* get subwindows from root */
 153         win = find_subwindow(root, -1, -1);
 154
 155         update_workarea();
 156
 157         win = find_subwindow(win, workarea[2], workarea[3]);
 158
 159         if (buf) {
 160                 XFree(buf);
 161                 buf = 0;
 162         }
 163
 164         if (win != root) {
 165                 fprintf(stderr,
 166                                 PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 167                                 win, root);
 168         } else {
 169                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 170         }
 171
 172         fflush(stderr);
 173
 174         *p_root = root;
 175         *p_desktop = win;
 176
 177         return win;
 178 }
 179
 180 static int colour_set = -1;
 181 /* if no argb visual is configured sets background to ParentRelative for the Window and all parents,
 182    else real transparency is used */
 183 void set_transparent_background(Window win, int alpha)
 184 {
 185         (void)alpha; /* disable warnings when unused */
 186
 187 #ifdef USE_ARGB
 188         if (have_argb_visual) {
 189                 // real transparency
 190                 if (set_transparent) {
 191                         XSetWindowBackground(display, win, 0x00);
 192                 } else if (colour_set != background_colour) {
 193                         XSetWindowBackground(display, win,
 194                                 background_colour | (alpha << 24));
 195                         colour_set = background_colour;
 196                 }
 197         } else {
 198 #endif /* USE_ARGB */
 199         // pseudo transparency
 200
 201         if (set_transparent) {
 202                 Window parent = win;
 203                 unsigned int i;
 204
 205                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 206                         Window r, *children;
 207                         unsigned int n;
 208
 209                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 210
 211                         XQueryTree(display, parent, &r, &parent, &children, &n);
 212                         XFree(children);
 213                 }
 214         } else if (colour_set != background_colour) {
 215                 XSetWindowBackground(display, win, background_colour);
 216                 colour_set = background_colour;
 217         }
 218 #ifdef USE_ARGB
 219         }
 220 #endif /* USE_ARGB */
 221 }
 222
 223 #ifdef USE_ARGB
 224 static int get_argb_visual(Visual** visual, int *depth) {
 225         /* code from gtk project, gdk_screen_get_rgba_visual */
 226         XVisualInfo visual_template;
 227         XVisualInfo *visual_list;
 228         int nxvisuals = 0, i;
 229
 230         visual_template.screen = screen;
 231         visual_list = XGetVisualInfo (display, VisualScreenMask,
 232                                 &visual_template, &nxvisuals);
 233         for (i = 0; i < nxvisuals; i++) {
 234                 if (visual_list[i].depth == 32 &&
 235                          (visual_list[i].red_mask   == 0xff0000 &&
 236                           visual_list[i].green_mask == 0x00ff00 &&
 237                           visual_list[i].blue_mask  == 0x0000ff)) {
 238                         *visual = visual_list[i].visual;
 239                         *depth = visual_list[i].depth;
 240                         DBGP("Found ARGB Visual");
 241                         XFree(visual_list);
 242                         return 1;
 243                 }
 244         }
 245         // no argb visual available
 246         DBGP("No ARGB Visual found");
 247         XFree(visual_list);
 248         return 0;
 249 }
 250 #endif /* USE_ARGB */
 251
 252 void destroy_window(void)
 253 {
 254 #ifdef XFT
 255         if(window.xftdraw) {
 256                 XftDrawDestroy(window.xftdraw);
 257         }
 258 #endif
 259         if(window.gc) {
 260                 XFreeGC(display, window.gc);
 261         }
 262         if(window.gc_back) {
 263                 XFreeGC(display, window.gc_back);
 264         }
 265         if(window.back_buffer != None) {
 266                 XFreePixmap(display, window.back_buffer);
 267         }
 268         memset(&window, 0, sizeof(struct conky_window));
 269         colour_set = -1;
 270 }
 271
 272 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 273                 char **argv, int argc)
 274 {
 275         /* There seems to be some problems with setting transparent background
 276          * (on fluxbox this time). It doesn't happen always and I don't know why it
 277          * happens but I bet the bug is somewhere here. */
 278         set_transparent = set_trans;
 279         background_colour = back_colour;
 280         window_created = 1;
 281
 282 #ifdef OWN_WINDOW
 283         if (own_window) {
 284                 int depth = 0, flags;
 285                 Visual *visual = NULL;
 286
 287                 if (!find_desktop_window(&window.root, &window.desktop)) {
 288                         return;
 289                 }
 290
 291 #ifdef USE_ARGB
 292                 if (use_argb_visual && get_argb_visual(&visual, &depth)) {
 293                         have_argb_visual = 1;
 294                         window.visual = visual;
 295                         window.colourmap = XCreateColormap(display,
 296                                 DefaultRootWindow(display), window.visual, AllocNone);
 297                 } else {
 298 #endif /* USE_ARGB */
 299                         window.visual = DefaultVisual(display, screen);
 300                         window.colourmap = DefaultColormap(display, screen);
 301                         depth = CopyFromParent;
 302                         visual = CopyFromParent;
 303 #ifdef USE_ARGB
 304                 }
 305 #endif /* USE_ARGB */
 306
 307                 if (window.type == TYPE_OVERRIDE) {
 308
 309                         /* An override_redirect True window.
 310                          * No WM hints or button processing needed. */
 311                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 312                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 313                                 True, 0, 0 };
 314 #ifdef USE_ARGB
 315                         if (have_argb_visual) {
 316                                 attrs.colormap = window.colourmap;
 317                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 318                         } else {
 319 #endif /* USE_ARGB */
 320                                 flags = CWBackPixel | CWOverrideRedirect;
 321 #ifdef USE_ARGB
 322                         }
 323 #endif /* USE_ARGB */
 324
 325                         /* Parent is desktop window (which might be a child of root) */
 326                         window.window = XCreateWindow(display, window.desktop, window.x,
 327                                         window.y, w, h, 0, depth, InputOutput, visual,
 328                                         flags, &attrs);
 329
 330                         XLowerWindow(display, window.window);
 331
 332                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 333                         fflush(stderr);
 334                 } else { /* window.type != TYPE_OVERRIDE */
 335
 336                         /* A window managed by the window manager.
 337                          * Process hints and buttons. */
 338                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 339                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 340                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 341
 342                         XClassHint classHint;
 343                         XWMHints wmHint;
 344                         Atom xa;
 345
 346 #ifdef USE_ARGB
 347                         if (have_argb_visual) {
 348                                 attrs.colormap = window.colourmap;
 349                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 350                         } else {
 351 #endif /* USE_ARGB */
 352                                 flags = CWBackPixel | CWOverrideRedirect;
 353 #ifdef USE_ARGB
 354                         }
 355 #endif /* USE_ARGB */
 356
 357                         if (window.type == TYPE_DOCK) {
 358                                 window.x = window.y = 0;
 359                         }
 360                         /* Parent is root window so WM can take control */
 361
 362                         fprintf(stderr, PACKAGE_NAME": creating window of %d x %d x %d\n",w,h,depth);
 363                         window.window = XCreateWindow(display, window.root, window.x,
 364                                         window.y, w, h, 0, depth, InputOutput, visual,
 365                                         flags, &attrs);
 366
 367                         classHint.res_name = window.class_name;
 368                         classHint.res_class = classHint.res_name;
 369
 370                         wmHint.flags = InputHint | StateHint;
 371                         /* allow decorated windows to be given input focus by WM */
 372                         wmHint.input =
 373                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 374                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 375                                 wmHint.initial_state = WithdrawnState;
 376                         } else {
 377                                 wmHint.initial_state = NormalState;
 378                         }
 379
 380                         XmbSetWMProperties(display, window.window, NULL, NULL, argv,
 381                                         argc, NULL, &wmHint, &classHint);
 382                         XStoreName(display, window.window, window.title);
 383
 384                         /* Sets an empty WM_PROTOCOLS property */
 385                         XSetWMProtocols(display, window.window, NULL, 0);
 386
 387                         /* Set window type */
 388                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 389                                 Atom prop;
 390
 391                                 switch (window.type) {
 392                                         case TYPE_DESKTOP:
 393                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 394                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 395                                                 fflush(stderr);
 396                                                 break;
 397                                         case TYPE_DOCK:
 398                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 399                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 400                                                 fflush(stderr);
 401                                                 break;
 402                                         case TYPE_PANEL:
 403                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 404                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 405                                                 fflush(stderr);
 406                                                 break;
 407                                         case TYPE_NORMAL:
 408                                         default:
 409                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 410                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 411                                                 fflush(stderr);
 412                                                 break;
 413                                 }
 414                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 415                                                 PropModeReplace, (unsigned char *) &prop, 1);
 416                         }
 417
 418                         /* Set desired hints */
 419
 420                         /* Window decorations */
 421                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 422                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 423                                    fflush(stderr); */
 424
 425                                 xa = ATOM(_MOTIF_WM_HINTS);
 426                                 if (xa != None) {
 427                                         long prop[5] = { 2, 0, 0, 0, 0 };
 428                                         XChangeProperty(display, window.window, xa, xa, 32,
 429                                                         PropModeReplace, (unsigned char *) prop, 5);
 430                                 }
 431                         }
 432
 433                         /* Below other windows */
 434                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 435                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 436                                    fflush(stderr); */
 437
 438                                 xa = ATOM(_WIN_LAYER);
 439                                 if (xa != None) {
 440                                         long prop = 0;
 441
 442                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 443                                                         PropModeAppend, (unsigned char *) &prop, 1);
 444                                 }
 445
 446                                 xa = ATOM(_NET_WM_STATE);
 447                                 if (xa != None) {
 448                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 449
 450                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 451                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 452                                 }
 453                         }
 454
 455                         /* Above other windows */
 456                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 457                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 458                                    fflush(stderr); */
 459
 460                                 xa = ATOM(_WIN_LAYER);
 461                                 if (xa != None) {
 462                                         long prop = 6;
 463
 464                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 465                                                         PropModeAppend, (unsigned char *) &prop, 1);
 466                                 }
 467
 468                                 xa = ATOM(_NET_WM_STATE);
 469                                 if (xa != None) {
 470                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 471
 472                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 473                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 474                                 }
 475                         }
 476
 477                         /* Sticky */
 478                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 479                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 480                                    fflush(stderr); */
 481
 482                                 xa = ATOM(_NET_WM_DESKTOP);
 483                                 if (xa != None) {
 484                                         CARD32 xa_prop = 0xFFFFFFFF;
 485
 486                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 487                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 488                                 }
 489
 490                                 xa = ATOM(_NET_WM_STATE);
 491                                 if (xa != None) {
 492                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 493
 494                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 495                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 496                                 }
 497                         }
 498
 499                         /* Skip taskbar */
 500                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 501                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 502                                    fflush(stderr); */
 503
 504                                 xa = ATOM(_NET_WM_STATE);
 505                                 if (xa != None) {
 506                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 507
 508                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 509                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 510                                 }
 511                         }
 512
 513                         /* Skip pager */
 514                         if (TEST_HINT(window.hints, HINT_FULLSCREEN)) {
 515                                 fprintf(stderr, PACKAGE_NAME": hint - fullscreen\n");
 516                                 fflush(stderr);
 517
 518                                 xa = ATOM(_NET_WM_STATE);
 519                                 if (xa != None) {
 520                                         Atom xa_prop = ATOM(_NET_WM_STATE_FULLSCREEN);
 521
 522                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 523                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 524                                 }
 525                         }
 526                 }
 527
 528                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 529                                 window.window);
 530                 fflush(stderr);
 531
 532                 XMapWindow(display, window.window);
 533
 534         } else
 535 #endif /* OWN_WINDOW */
 536         {
 537                 if (!window.window) {
 538                         window.window = find_desktop_window(&window.root, &window.desktop);
 539                 }
 540                 window.visual = DefaultVisual(display, screen);
 541                 window.colourmap = DefaultColormap(display, screen);
 542
 543                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 544         }
 545
 546         {
 547                 fprintf(stderr, PACKAGE_NAME": getting window attrs\n");
 548                 XWindowAttributes attrs;
 549                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 550                         window.width = attrs.width;
 551                         window.height = attrs.height;
 552                         window.depth = attrs.depth;
 553                 }
 554         }
 555
 556         /* Drawable is same as window. This may be changed by double buffering. */
 557         window.drawable = window.window;
 558
 559 #ifdef HAVE_XDBE
 560         if (use_xdbe) {
 561                 {
 562                         window.back_buffer = XCreatePixmap(display, window.window,
 563                                                                                            window.width, window.height, window.depth);
 564                         if (window.back_buffer != None) {
 565                                 window.drawable = window.back_buffer;
 566                                 fprintf(stderr, PACKAGE_NAME": created %d x %d x %d back buffer\n",window.width, window.height, window.depth);
 567                         } else {
 568                                 use_xdbe = 0;
 569                         }
 570                 }
 571                 if (!use_xdbe) {
 572                         NORM_ERR("failed to set up double buffer");
 573                 }
 574         }
 575         if (!use_xdbe) {
 576                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 577         }
 578 #endif
 579 #ifdef IMLIB2
 580         {
 581                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 582         }
 583 #endif /* IMLIB2 */
 584         XFlush(display);
 585
 586         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 587 #ifdef OWN_WINDOW
 588                         | (own_window ? (StructureNotifyMask |
 589                                         ButtonPressMask | ButtonReleaseMask) : 0)
 590 #endif
 591                         );
 592 }
 593
 594 static Window find_subwindow(Window win, int w, int h)
 595 {
 596         unsigned int i, j;
 597         Window troot, parent, *children;
 598         unsigned int n;
 599
 600         /* search subwindows with same size as display or work area */
 601
 602         for (i = 0; i < 10; i++) {
 603                 XQueryTree(display, win, &troot, &parent, &children, &n);
 604
 605                 for (j = 0; j < n; j++) {
 606                         XWindowAttributes attrs;
 607
 608                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 609                                 /* Window must be mapped and same size as display or
 610                                  * work space */
 611                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 612                                                                 && attrs.height == display_height)
 613                                                         || (attrs.width == w && attrs.height == h))) {
 614                                         win = children[j];
 615                                         break;
 616                                 }
 617                         }
 618                 }
 619
 620                 XFree(children);
 621                 if (j == n) {
 622                         break;
 623                 }
 624         }
 625
 626         return win;
 627 }
 628
 629 void create_gc(void)
 630 {
 631         XGCValues values;
 632
 633         values.graphics_exposures = 0;
 634         values.function = GXcopy;
 635         window.gc = XCreateGC(display, window.drawable,
 636                         GCFunction | GCGraphicsExposures, &values);
 637         window.gc_back = XCreateGC(display, window.drawable,
 638                         GCFunction | GCGraphicsExposures, &values);
 639 }
 640
 641 //Get current desktop number
 642 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 643 {
 644         Atom actual_type;
 645         int actual_format;
 646         unsigned long nitems;
 647         unsigned long bytes_after;
 648         unsigned char *prop = NULL;
 649         struct information *current_info = &info;
 650
 651         if (atom == None) return;
 652
 653         if ( (XGetWindowProperty( current_display, root, atom,
 654                                         0, 1L, False, XA_CARDINAL,
 655                                         &actual_type, &actual_format, &nitems,
 656                                         &bytes_after, &prop ) == Success ) &&
 657                         (actual_type == XA_CARDINAL) &&
 658                         (nitems == 1L) && (actual_format == 32) ) {
 659                 current_info->x11.desktop.current = prop[0]+1;
 660         }
 661         if(prop) {
 662                 XFree(prop);
 663         }
 664 }
 665
 666 //Get total number of available desktops
 667 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 668 {
 669         Atom actual_type;
 670         int actual_format;
 671         unsigned long nitems;
 672         unsigned long bytes_after;
 673         unsigned char *prop = NULL;
 674         struct information *current_info = &info;
 675
 676         if (atom == None) return;
 677
 678         if ( (XGetWindowProperty( current_display, root, atom,
 679                                         0, 1L, False, XA_CARDINAL,
 680                                         &actual_type, &actual_format, &nitems,
 681                                         &bytes_after, &prop ) == Success ) &&
 682                         (actual_type == XA_CARDINAL) &&
 683                         (nitems == 1L) && (actual_format == 32) ) {
 684                 current_info->x11.desktop.number = prop[0];
 685         }
 686         if(prop) {
 687                 XFree(prop);
 688         }
 689 }
 690
 691 //Get all desktop names
 692 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 693 {
 694         Atom actual_type;
 695         int actual_format;
 696         unsigned long nitems;
 697         unsigned long bytes_after;
 698         unsigned char *prop = NULL;
 699         struct information *current_info = &info;
 700
 701         if (atom == None) return;
 702
 703         if ( (XGetWindowProperty( current_display, root, atom,
 704                                         0, (~0L), False, ATOM(UTF8_STRING),
 705                                         &actual_type, &actual_format, &nitems,
 706                                         &bytes_after, &prop ) == Success ) &&
 707                         (actual_type == ATOM(UTF8_STRING)) &&
 708                         (nitems > 0L) && (actual_format == 8) ) {
 709
 710                 if(current_info->x11.desktop.all_names) {
 711                         free(current_info->x11.desktop.all_names);
 712                         current_info->x11.desktop.all_names = NULL;
 713                 }
 714                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 715                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 716                 current_info->x11.desktop.nitems = nitems;
 717         }
 718         if(prop) {
 719                 XFree(prop);
 720         }
 721 }
 722
 723 //Get current desktop name
 724 static inline void get_x11_desktop_current_name(char *names)
 725 {
 726         struct information *current_info = &info;
 727         unsigned int i = 0, j = 0;
 728         int k = 0;
 729
 730         while ( i < current_info->x11.desktop.nitems ) {
 731                 if ( names[i++] == '\0' ) {
 732                         if ( ++k == current_info->x11.desktop.current ) {
 733                                 if (current_info->x11.desktop.name) {
 734                                         free(current_info->x11.desktop.name);
 735                                         current_info->x11.desktop.name = NULL;
 736                                 }
 737                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 738                                 //desktop names can be empty but should always be not null
 739                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 740                                 break;
 741                         }
 742                         j = i;
 743                 }
 744         }
 745 }
 746
 747 void get_x11_desktop_info(Display *current_display, Atom atom)
 748 {
 749         Window root;
 750         static Atom atom_current, atom_number, atom_names;
 751         struct information *current_info = &info;
 752         XWindowAttributes window_attributes;
 753
 754         root = RootWindow(current_display, current_info->x11.monitor.current);
 755
 756         /* Check if we initialise else retrieve changed property */
 757         if (atom == 0) {
 758                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 759                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 760                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 761                 get_x11_desktop_current(current_display, root, atom_current);
 762                 get_x11_desktop_number(current_display, root, atom_number);
 763                 get_x11_desktop_names(current_display, root, atom_names);
 764                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 765
 766                 /* Set the PropertyChangeMask on the root window, if not set */
 767                 XGetWindowAttributes(display, root, &window_attributes);
 768                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 769                         XSetWindowAttributes attributes;
 770                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 771                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 772                         XGetWindowAttributes(display, root, &window_attributes);
 773                 }
 774         } else {
 775                 if (atom == atom_current) {
 776                         get_x11_desktop_current(current_display, root, atom_current);
 777                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 778                 } else if (atom == atom_number) {
 779                         get_x11_desktop_number(current_display, root, atom_number);
 780                 } else if (atom == atom_names) {
 781                         get_x11_desktop_names(current_display, root, atom_names);
 782                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 783                 }
 784         }
 785 }
 786
 787 int update_x11info(void)
 788 {
 789         struct information *current_info = &info;
 790         if (x_initialised != YES)
 791                 return 0;
 792         current_info->x11.monitor.number = XScreenCount(display);
 793         current_info->x11.monitor.current = XDefaultScreen(display);
 794         return 0;
 795 }
 796
 797 #ifdef OWN_WINDOW
 798 /* reserve window manager space */
 799 void set_struts(int sidenum)
 800 {
 801         Atom strut;
 802         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 803                 /* reserve space at left, right, top, bottom */
 804                 signed long sizes[12] = {0};
 805                 int i;
 806
 807                 /* define strut depth */
 808                 switch (sidenum) {
 809                         case 0:
 810                                 /* left side */
 811                                 sizes[0] = window.x + window.width;
 812                                 break;
 813                         case 1:
 814                                 /* right side */
 815                                 sizes[1] = display_width - window.x;
 816                                 break;
 817                         case 2:
 818                                 /* top side */
 819                                 sizes[2] = window.y + window.height;
 820                                 break;
 821                         case 3:
 822                                 /* bottom side */
 823                                 sizes[3] = display_height - window.y;
 824                                 break;
 825                 }
 826
 827                 /* define partial strut length */
 828                 if (sidenum <= 1) {
 829                         sizes[4 + (sidenum*2)] = window.y;
 830                         sizes[5 + (sidenum*2)] = window.y + window.height;
 831                 } else if (sidenum <= 3) {
 832                         sizes[4 + (sidenum*2)] = window.x;
 833                         sizes[5 + (sidenum*2)] = window.x + window.width;
 834                 }
 835
 836                 /* check constraints */
 837                 for (i = 0; i < 12; i++) {
 838                         if (sizes[i] < 0) {
 839                                 sizes[i] = 0;
 840                         } else {
 841                                 if (i <= 1 || i >= 8) {
 842                                         if (sizes[i] > display_width) {
 843                                                 sizes[i] = display_width;
 844                                         }
 845                                 } else {
 846                                         if (sizes[i] > display_height) {
 847                                                 sizes[i] = display_height;
 848                                         }
 849                                 }
 850                         }
 851                 }
 852
 853                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 854                                 PropModeReplace, (unsigned char *) &sizes, 4);
 855
 856                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 857                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 858                                         PropModeReplace, (unsigned char *) &sizes, 12);
 859                 }
 860         }
 861 }
 862 #endif /* OWN_WINDOW */
 863
 864 #ifdef HAVE_XDBE
 865 void xdbe_swap_buffers(void)
 866 {
 867         if (use_xdbe) {
 868                 //XWindowAttributes dest;//leaks
 869                 //XGetWindowAttributes(display, window.window, &dest);
 870                 //unsigned int src_height, src_width, src_depth = 0;
 871                 //XGetGeometry(display, window.back_buffer, NULL, NULL, NULL,src_width,src_height, NULL, src_depth);
 872 //              fprintf(stderr, PACKAGE_NAME": copy from %d x %d x %d to %d x %d x %d\n",src_width, src_height, src_depth, dest.width, dest.height, dest.depth);
 873                 XCopyArea(display, window.drawable, window.window,
 874                                   window.gc_back, 0, 0, window.width, window.height, 0, 0);
 875                 /* FIXME should fill w/ window background */
 876                 XSetForeground(display,window.gc_back,background_colour);
 877                 XFillRectangle(display, window.back_buffer, window.gc_back,
 878                                            0, 0, window.width, window.height);
 879         }
 880 }
 881 #endif /* HAVE_XDBE */
 882