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 = 0;
  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 own_window_argb_value;
  57 int have_argb_visual;
  58 #endif /* USE_ARGB */
  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                         return 1;
 242                 }
 243         }
 244         // no argb visual available
 245         DBGP("No ARGB Visual found");
 246         return 0;
 247 }
 248 #endif /* USE_ARGB */
 249
 250 void destroy_window(void)
 251 {
 252 #ifdef XFT
 253         if(window.xftdraw) {
 254                 XftDrawDestroy(window.xftdraw);
 255         }
 256 #endif
 257         if(window.gc) {
 258                 XFreeGC(display, window.gc);
 259         }
 260         memset(&window, 0, sizeof(struct conky_window));
 261         colour_set = -1;
 262 }
 263
 264 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 265                 char **argv, int argc)
 266 {
 267         /* There seems to be some problems with setting transparent background
 268          * (on fluxbox this time). It doesn't happen always and I don't know why it
 269          * happens but I bet the bug is somewhere here. */
 270         set_transparent = set_trans;
 271         background_colour = back_colour;
 272         window_created = 1;
 273
 274 #ifdef OWN_WINDOW
 275         if (own_window) {
 276                 int depth = 0, flags;
 277                 Visual *visual = NULL;
 278
 279                 if (!find_desktop_window(&window.root, &window.desktop)) {
 280                         return;
 281                 }
 282
 283 #ifdef USE_ARGB
 284                 if (use_argb_visual && get_argb_visual(&visual, &depth)) {
 285                         have_argb_visual = 1;
 286                         window.visual = visual;
 287                         window.colourmap = XCreateColormap(display,
 288                                 DefaultRootWindow(display), window.visual, AllocNone);
 289                 } else {
 290 #endif /* USE_ARGB */
 291                         window.visual = DefaultVisual(display, screen);
 292                         window.colourmap = DefaultColormap(display, screen);
 293                         depth = CopyFromParent;
 294                         visual = CopyFromParent;
 295 #ifdef USE_ARGB
 296                 }
 297 #endif /* USE_ARGB */
 298
 299                 if (window.type == TYPE_OVERRIDE) {
 300
 301                         /* An override_redirect True window.
 302                          * No WM hints or button processing needed. */
 303                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 304                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 305                                 True, 0, 0 };
 306 #ifdef USE_ARGB
 307                         if (have_argb_visual) {
 308                                 attrs.colormap = window.colourmap;
 309                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 310                         } else {
 311 #endif /* USE_ARGB */
 312                                 flags = CWBackPixel | CWOverrideRedirect;
 313 #ifdef USE_ARGB
 314                         }
 315 #endif /* USE_ARGB */
 316
 317                         /* Parent is desktop window (which might be a child of root) */
 318                         window.window = XCreateWindow(display, window.desktop, window.x,
 319                                         window.y, w, h, 0, depth, InputOutput, visual,
 320                                         flags, &attrs);
 321
 322                         XLowerWindow(display, window.window);
 323
 324                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 325                         fflush(stderr);
 326                 } else { /* window.type != TYPE_OVERRIDE */
 327
 328                         /* A window managed by the window manager.
 329                          * Process hints and buttons. */
 330                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 331                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 332                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 333
 334                         XClassHint classHint;
 335                         XWMHints wmHint;
 336                         Atom xa;
 337
 338 #ifdef USE_ARGB
 339                         if (have_argb_visual) {
 340                                 attrs.colormap = window.colourmap;
 341                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 342                         } else {
 343 #endif /* USE_ARGB */
 344                                 flags = CWBackPixel | CWOverrideRedirect;
 345 #ifdef USE_ARGB
 346                         }
 347 #endif /* USE_ARGB */
 348
 349                         if (window.type == TYPE_DOCK) {
 350                                 window.x = window.y = 0;
 351                         }
 352                         /* Parent is root window so WM can take control */
 353                         window.window = XCreateWindow(display, window.root, window.x,
 354                                         window.y, w, h, 0, depth, InputOutput, visual,
 355                                         flags, &attrs);
 356
 357                         classHint.res_name = window.class_name;
 358                         classHint.res_class = classHint.res_name;
 359
 360                         wmHint.flags = InputHint | StateHint;
 361                         /* allow decorated windows to be given input focus by WM */
 362                         wmHint.input =
 363                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 364                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 365                                 wmHint.initial_state = WithdrawnState;
 366                         } else {
 367                                 wmHint.initial_state = NormalState;
 368                         }
 369
 370                         XmbSetWMProperties(display, window.window, NULL, NULL, argv,
 371                                         argc, NULL, &wmHint, &classHint);
 372                         XStoreName(display, window.window, window.title);
 373
 374                         /* Sets an empty WM_PROTOCOLS property */
 375                         XSetWMProtocols(display, window.window, NULL, 0);
 376
 377                         /* Set window type */
 378                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 379                                 Atom prop;
 380
 381                                 switch (window.type) {
 382                                         case TYPE_DESKTOP:
 383                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 384                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 385                                                 fflush(stderr);
 386                                                 break;
 387                                         case TYPE_DOCK:
 388                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 389                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 390                                                 fflush(stderr);
 391                                                 break;
 392                                         case TYPE_PANEL:
 393                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 394                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 395                                                 fflush(stderr);
 396                                                 break;
 397                                         case TYPE_NORMAL:
 398                                         default:
 399                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 400                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 401                                                 fflush(stderr);
 402                                                 break;
 403                                 }
 404                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 405                                                 PropModeReplace, (unsigned char *) &prop, 1);
 406                         }
 407
 408                         /* Set desired hints */
 409
 410                         /* Window decorations */
 411                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 412                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 413                                    fflush(stderr); */
 414
 415                                 xa = ATOM(_MOTIF_WM_HINTS);
 416                                 if (xa != None) {
 417                                         long prop[5] = { 2, 0, 0, 0, 0 };
 418                                         XChangeProperty(display, window.window, xa, xa, 32,
 419                                                         PropModeReplace, (unsigned char *) prop, 5);
 420                                 }
 421                         }
 422
 423                         /* Below other windows */
 424                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 425                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 426                                    fflush(stderr); */
 427
 428                                 xa = ATOM(_WIN_LAYER);
 429                                 if (xa != None) {
 430                                         long prop = 0;
 431
 432                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 433                                                         PropModeAppend, (unsigned char *) &prop, 1);
 434                                 }
 435
 436                                 xa = ATOM(_NET_WM_STATE);
 437                                 if (xa != None) {
 438                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 439
 440                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 441                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 442                                 }
 443                         }
 444
 445                         /* Above other windows */
 446                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 447                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 448                                    fflush(stderr); */
 449
 450                                 xa = ATOM(_WIN_LAYER);
 451                                 if (xa != None) {
 452                                         long prop = 6;
 453
 454                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 455                                                         PropModeAppend, (unsigned char *) &prop, 1);
 456                                 }
 457
 458                                 xa = ATOM(_NET_WM_STATE);
 459                                 if (xa != None) {
 460                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 461
 462                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 463                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 464                                 }
 465                         }
 466
 467                         /* Sticky */
 468                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 469                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 470                                    fflush(stderr); */
 471
 472                                 xa = ATOM(_NET_WM_DESKTOP);
 473                                 if (xa != None) {
 474                                         CARD32 xa_prop = 0xFFFFFFFF;
 475
 476                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 477                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 478                                 }
 479
 480                                 xa = ATOM(_NET_WM_STATE);
 481                                 if (xa != None) {
 482                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 483
 484                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 485                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 486                                 }
 487                         }
 488
 489                         /* Skip taskbar */
 490                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 491                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 492                                    fflush(stderr); */
 493
 494                                 xa = ATOM(_NET_WM_STATE);
 495                                 if (xa != None) {
 496                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 497
 498                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 499                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 500                                 }
 501                         }
 502
 503                         /* Skip pager */
 504                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 505                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 506                                    fflush(stderr); */
 507
 508                                 xa = ATOM(_NET_WM_STATE);
 509                                 if (xa != None) {
 510                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 511
 512                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 513                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 514                                 }
 515                         }
 516                 }
 517
 518                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 519                                 window.window);
 520                 fflush(stderr);
 521
 522                 XMapWindow(display, window.window);
 523
 524         } else
 525 #endif /* OWN_WINDOW */
 526         {
 527                 XWindowAttributes attrs;
 528
 529                 if (!window.window) {
 530                         window.window = find_desktop_window(&window.root, &window.desktop);
 531                 }
 532
 533                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 534                         window.width = attrs.width;
 535                         window.height = attrs.height;
 536                 }
 537
 538                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 539         }
 540
 541         /* Drawable is same as window. This may be changed by double buffering. */
 542         window.drawable = window.window;
 543
 544 #ifdef HAVE_XDBE
 545         if (use_xdbe) {
 546                 int major, minor;
 547
 548                 if (!XdbeQueryExtension(display, &major, &minor)) {
 549                         use_xdbe = 0;
 550                 } else {
 551                         window.back_buffer = XdbeAllocateBackBufferName(display,
 552                                         window.window, XdbeBackground);
 553                         if (window.back_buffer != None) {
 554                                 window.drawable = window.back_buffer;
 555                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 556                         } else {
 557                                 use_xdbe = 0;
 558                         }
 559                 }
 560                 if (!use_xdbe) {
 561                         NORM_ERR("failed to set up double buffer");
 562                 }
 563         }
 564         if (!use_xdbe) {
 565                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 566         }
 567 #endif
 568 #ifdef IMLIB2
 569         {
 570                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 571         }
 572 #endif /* IMLIB2 */
 573         XFlush(display);
 574
 575         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 576 #ifdef OWN_WINDOW
 577                         | (own_window ? (StructureNotifyMask |
 578                                         ButtonPressMask | ButtonReleaseMask) : 0)
 579 #endif
 580                         );
 581 }
 582
 583 static Window find_subwindow(Window win, int w, int h)
 584 {
 585         unsigned int i, j;
 586         Window troot, parent, *children;
 587         unsigned int n;
 588
 589         /* search subwindows with same size as display or work area */
 590
 591         for (i = 0; i < 10; i++) {
 592                 XQueryTree(display, win, &troot, &parent, &children, &n);
 593
 594                 for (j = 0; j < n; j++) {
 595                         XWindowAttributes attrs;
 596
 597                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 598                                 /* Window must be mapped and same size as display or
 599                                  * work space */
 600                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 601                                                                 && attrs.height == display_height)
 602                                                         || (attrs.width == w && attrs.height == h))) {
 603                                         win = children[j];
 604                                         break;
 605                                 }
 606                         }
 607                 }
 608
 609                 XFree(children);
 610                 if (j == n) {
 611                         break;
 612                 }
 613         }
 614
 615         return win;
 616 }
 617
 618 void create_gc(void)
 619 {
 620         XGCValues values;
 621
 622         values.graphics_exposures = 0;
 623         values.function = GXcopy;
 624         window.gc = XCreateGC(display, window.drawable,
 625                         GCFunction | GCGraphicsExposures, &values);
 626 }
 627
 628 //Get current desktop number
 629 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 630 {
 631         Atom actual_type;
 632         int actual_format;
 633         unsigned long nitems;
 634         unsigned long bytes_after;
 635         unsigned char *prop = NULL;
 636         struct information *current_info = &info;
 637
 638         if (atom == None) return;
 639
 640         if ( (XGetWindowProperty( current_display, root, atom,
 641                                         0, 1L, False, XA_CARDINAL,
 642                                         &actual_type, &actual_format, &nitems,
 643                                         &bytes_after, &prop ) == Success ) &&
 644                         (actual_type == XA_CARDINAL) &&
 645                         (nitems == 1L) && (actual_format == 32) ) {
 646                 current_info->x11.desktop.current = prop[0]+1;
 647         }
 648         if(prop) {
 649                 XFree(prop);
 650         }
 651 }
 652
 653 //Get total number of available desktops
 654 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 655 {
 656         Atom actual_type;
 657         int actual_format;
 658         unsigned long nitems;
 659         unsigned long bytes_after;
 660         unsigned char *prop = NULL;
 661         struct information *current_info = &info;
 662
 663         if (atom == None) return;
 664
 665         if ( (XGetWindowProperty( current_display, root, atom,
 666                                         0, 1L, False, XA_CARDINAL,
 667                                         &actual_type, &actual_format, &nitems,
 668                                         &bytes_after, &prop ) == Success ) &&
 669                         (actual_type == XA_CARDINAL) &&
 670                         (nitems == 1L) && (actual_format == 32) ) {
 671                 current_info->x11.desktop.number = prop[0];
 672         }
 673         if(prop) {
 674                 XFree(prop);
 675         }
 676 }
 677
 678 //Get all desktop names
 679 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 680 {
 681         Atom actual_type;
 682         int actual_format;
 683         unsigned long nitems;
 684         unsigned long bytes_after;
 685         unsigned char *prop = NULL;
 686         struct information *current_info = &info;
 687
 688         if (atom == None) return;
 689
 690         if ( (XGetWindowProperty( current_display, root, atom,
 691                                         0, (~0L), False, ATOM(UTF8_STRING),
 692                                         &actual_type, &actual_format, &nitems,
 693                                         &bytes_after, &prop ) == Success ) &&
 694                         (actual_type == ATOM(UTF8_STRING)) &&
 695                         (nitems > 0L) && (actual_format == 8) ) {
 696
 697                 if(current_info->x11.desktop.all_names) {
 698                         free(current_info->x11.desktop.all_names);
 699                         current_info->x11.desktop.all_names = NULL;
 700                 }
 701                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 702                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 703                 current_info->x11.desktop.nitems = nitems;
 704         }
 705         if(prop) {
 706                 XFree(prop);
 707         }
 708 }
 709
 710 //Get current desktop name
 711 static inline void get_x11_desktop_current_name(char *names)
 712 {
 713         struct information *current_info = &info;
 714         unsigned int i = 0, j = 0;
 715         int k = 0;
 716
 717         while ( i < current_info->x11.desktop.nitems ) {
 718                 if ( names[i++] == '\0' ) {
 719                         if ( ++k == current_info->x11.desktop.current ) {
 720                                 if (current_info->x11.desktop.name) {
 721                                         free(current_info->x11.desktop.name);
 722                                         current_info->x11.desktop.name = NULL;
 723                                 }
 724                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 725                                 //desktop names can be empty but should always be not null
 726                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 727                                 break;
 728                         }
 729                         j = i;
 730                 }
 731         }
 732 }
 733
 734 void get_x11_desktop_info(Display *current_display, Atom atom)
 735 {
 736         Window root;
 737         static Atom atom_current, atom_number, atom_names;
 738         struct information *current_info = &info;
 739         XWindowAttributes window_attributes;
 740
 741         root = RootWindow(current_display, current_info->x11.monitor.current);
 742
 743         /* Check if we initialise else retrieve changed property */
 744         if (atom == 0) {
 745                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 746                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 747                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 748                 get_x11_desktop_current(current_display, root, atom_current);
 749                 get_x11_desktop_number(current_display, root, atom_number);
 750                 get_x11_desktop_names(current_display, root, atom_names);
 751                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 752
 753                 /* Set the PropertyChangeMask on the root window, if not set */
 754                 XGetWindowAttributes(display, root, &window_attributes);
 755                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 756                         XSetWindowAttributes attributes;
 757                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 758                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 759                         XGetWindowAttributes(display, root, &window_attributes);
 760                 }
 761         } else {
 762                 if (atom == atom_current) {
 763                         get_x11_desktop_current(current_display, root, atom_current);
 764                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 765                 } else if (atom == atom_number) {
 766                         get_x11_desktop_number(current_display, root, atom_number);
 767                 } else if (atom == atom_names) {
 768                         get_x11_desktop_names(current_display, root, atom_names);
 769                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 770                 }
 771         }
 772 }
 773
 774 void update_x11info(void)
 775 {
 776         struct information *current_info = &info;
 777         if (!x_initialised == YES)
 778                 return;
 779         current_info->x11.monitor.number = XScreenCount(display);
 780         current_info->x11.monitor.current = XDefaultScreen(display);
 781 }
 782
 783 #ifdef OWN_WINDOW
 784 /* reserve window manager space */
 785 void set_struts(int sidenum)
 786 {
 787         Atom strut;
 788         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 789                 /* reserve space at left, right, top, bottom */
 790                 signed long sizes[12] = {0};
 791                 int i;
 792
 793                 /* define strut depth */
 794                 switch (sidenum) {
 795                         case 0:
 796                                 /* left side */
 797                                 sizes[0] = window.x + window.width;
 798                                 break;
 799                         case 1:
 800                                 /* right side */
 801                                 sizes[1] = display_width - window.x;
 802                                 break;
 803                         case 2:
 804                                 /* top side */
 805                                 sizes[2] = window.y + window.height;
 806                                 break;
 807                         case 3:
 808                                 /* bottom side */
 809                                 sizes[3] = display_height - window.y;
 810                                 break;
 811                 }
 812
 813                 /* define partial strut length */
 814                 if (sidenum <= 1) {
 815                         sizes[4 + (sidenum*2)] = window.y;
 816                         sizes[5 + (sidenum*2)] = window.y + window.height;
 817                 } else if (sidenum <= 3) {
 818                         sizes[4 + (sidenum*2)] = window.x;
 819                         sizes[5 + (sidenum*2)] = window.x + window.width;
 820                 }
 821
 822                 /* check constraints */
 823                 for (i = 0; i < 12; i++) {
 824                         if (sizes[i] < 0) {
 825                                 sizes[i] = 0;
 826                         } else {
 827                                 if (i <= 1 || i >= 8) {
 828                                         if (sizes[i] > display_width) {
 829                                                 sizes[i] = display_width;
 830                                         }
 831                                 } else {
 832                                         if (sizes[i] > display_height) {
 833                                                 sizes[i] = display_height;
 834                                         }
 835                                 }
 836                         }
 837                 }
 838
 839                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 840                                 PropModeReplace, (unsigned char *) &sizes, 4);
 841
 842                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 843                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 844                                         PropModeReplace, (unsigned char *) &sizes, 12);
 845                 }
 846         }
 847 }
 848 #endif /* OWN_WINDOW */
 849
 850 #ifdef HAVE_XDBE
 851 void xdbe_swap_buffers(void)
 852 {
 853         if (use_xdbe) {
 854                 XdbeSwapInfo swap;
 855
 856                 swap.swap_window = window.window;
 857                 swap.swap_action = XdbeBackground;
 858                 XdbeSwapBuffers(display, &swap, 1);
 859         }
 860 }
 861 #endif /* HAVE_XDBE */
 862