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                         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         memset(&window, 0, sizeof(struct conky_window));
 263         colour_set = -1;
 264 }
 265
 266 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 267                 char **argv, int argc)
 268 {
 269         /* There seems to be some problems with setting transparent background
 270          * (on fluxbox this time). It doesn't happen always and I don't know why it
 271          * happens but I bet the bug is somewhere here. */
 272         set_transparent = set_trans;
 273         background_colour = back_colour;
 274         window_created = 1;
 275
 276 #ifdef OWN_WINDOW
 277         if (own_window) {
 278                 int depth = 0, flags;
 279                 Visual *visual = NULL;
 280
 281                 if (!find_desktop_window(&window.root, &window.desktop)) {
 282                         return;
 283                 }
 284
 285 #ifdef USE_ARGB
 286                 if (use_argb_visual && get_argb_visual(&visual, &depth)) {
 287                         have_argb_visual = 1;
 288                         window.visual = visual;
 289                         window.colourmap = XCreateColormap(display,
 290                                 DefaultRootWindow(display), window.visual, AllocNone);
 291                 } else {
 292 #endif /* USE_ARGB */
 293                         window.visual = DefaultVisual(display, screen);
 294                         window.colourmap = DefaultColormap(display, screen);
 295                         depth = CopyFromParent;
 296                         visual = CopyFromParent;
 297 #ifdef USE_ARGB
 298                 }
 299 #endif /* USE_ARGB */
 300
 301                 if (window.type == TYPE_OVERRIDE) {
 302
 303                         /* An override_redirect True window.
 304                          * No WM hints or button processing needed. */
 305                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 306                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 307                                 True, 0, 0 };
 308 #ifdef USE_ARGB
 309                         if (have_argb_visual) {
 310                                 attrs.colormap = window.colourmap;
 311                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 312                         } else {
 313 #endif /* USE_ARGB */
 314                                 flags = CWBackPixel | CWOverrideRedirect;
 315 #ifdef USE_ARGB
 316                         }
 317 #endif /* USE_ARGB */
 318
 319                         /* Parent is desktop window (which might be a child of root) */
 320                         window.window = XCreateWindow(display, window.desktop, window.x,
 321                                         window.y, w, h, 0, depth, InputOutput, visual,
 322                                         flags, &attrs);
 323
 324                         XLowerWindow(display, window.window);
 325
 326                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 327                         fflush(stderr);
 328                 } else { /* window.type != TYPE_OVERRIDE */
 329
 330                         /* A window managed by the window manager.
 331                          * Process hints and buttons. */
 332                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 333                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 334                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 335
 336                         XClassHint classHint;
 337                         XWMHints wmHint;
 338                         Atom xa;
 339
 340 #ifdef USE_ARGB
 341                         if (have_argb_visual) {
 342                                 attrs.colormap = window.colourmap;
 343                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 344                         } else {
 345 #endif /* USE_ARGB */
 346                                 flags = CWBackPixel | CWOverrideRedirect;
 347 #ifdef USE_ARGB
 348                         }
 349 #endif /* USE_ARGB */
 350
 351                         if (window.type == TYPE_DOCK) {
 352                                 window.x = window.y = 0;
 353                         }
 354                         /* Parent is root window so WM can take control */
 355                         window.window = XCreateWindow(display, window.root, window.x,
 356                                         window.y, w, h, 0, depth, InputOutput, visual,
 357                                         flags, &attrs);
 358
 359                         classHint.res_name = window.class_name;
 360                         classHint.res_class = classHint.res_name;
 361
 362                         wmHint.flags = InputHint | StateHint;
 363                         /* allow decorated windows to be given input focus by WM */
 364                         wmHint.input =
 365                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 366                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 367                                 wmHint.initial_state = WithdrawnState;
 368                         } else {
 369                                 wmHint.initial_state = NormalState;
 370                         }
 371
 372                         XmbSetWMProperties(display, window.window, NULL, NULL, argv,
 373                                         argc, NULL, &wmHint, &classHint);
 374                         XStoreName(display, window.window, window.title);
 375
 376                         /* Sets an empty WM_PROTOCOLS property */
 377                         XSetWMProtocols(display, window.window, NULL, 0);
 378
 379                         /* Set window type */
 380                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 381                                 Atom prop;
 382
 383                                 switch (window.type) {
 384                                         case TYPE_DESKTOP:
 385                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 386                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 387                                                 fflush(stderr);
 388                                                 break;
 389                                         case TYPE_DOCK:
 390                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 391                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 392                                                 fflush(stderr);
 393                                                 break;
 394                                         case TYPE_PANEL:
 395                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 396                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 397                                                 fflush(stderr);
 398                                                 break;
 399                                         case TYPE_NORMAL:
 400                                         default:
 401                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 402                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 403                                                 fflush(stderr);
 404                                                 break;
 405                                 }
 406                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 407                                                 PropModeReplace, (unsigned char *) &prop, 1);
 408                         }
 409
 410                         /* Set desired hints */
 411
 412                         /* Window decorations */
 413                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 414                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 415                                    fflush(stderr); */
 416
 417                                 xa = ATOM(_MOTIF_WM_HINTS);
 418                                 if (xa != None) {
 419                                         long prop[5] = { 2, 0, 0, 0, 0 };
 420                                         XChangeProperty(display, window.window, xa, xa, 32,
 421                                                         PropModeReplace, (unsigned char *) prop, 5);
 422                                 }
 423                         }
 424
 425                         /* Below other windows */
 426                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 427                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 428                                    fflush(stderr); */
 429
 430                                 xa = ATOM(_WIN_LAYER);
 431                                 if (xa != None) {
 432                                         long prop = 0;
 433
 434                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 435                                                         PropModeAppend, (unsigned char *) &prop, 1);
 436                                 }
 437
 438                                 xa = ATOM(_NET_WM_STATE);
 439                                 if (xa != None) {
 440                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 441
 442                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 443                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 444                                 }
 445                         }
 446
 447                         /* Above other windows */
 448                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 449                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 450                                    fflush(stderr); */
 451
 452                                 xa = ATOM(_WIN_LAYER);
 453                                 if (xa != None) {
 454                                         long prop = 6;
 455
 456                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 457                                                         PropModeAppend, (unsigned char *) &prop, 1);
 458                                 }
 459
 460                                 xa = ATOM(_NET_WM_STATE);
 461                                 if (xa != None) {
 462                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 463
 464                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 465                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 466                                 }
 467                         }
 468
 469                         /* Sticky */
 470                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 471                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 472                                    fflush(stderr); */
 473
 474                                 xa = ATOM(_NET_WM_DESKTOP);
 475                                 if (xa != None) {
 476                                         CARD32 xa_prop = 0xFFFFFFFF;
 477
 478                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 479                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 480                                 }
 481
 482                                 xa = ATOM(_NET_WM_STATE);
 483                                 if (xa != None) {
 484                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 485
 486                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 487                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 488                                 }
 489                         }
 490
 491                         /* Skip taskbar */
 492                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 493                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 494                                    fflush(stderr); */
 495
 496                                 xa = ATOM(_NET_WM_STATE);
 497                                 if (xa != None) {
 498                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 499
 500                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 501                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 502                                 }
 503                         }
 504
 505                         /* Skip pager */
 506                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 507                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 508                                    fflush(stderr); */
 509
 510                                 xa = ATOM(_NET_WM_STATE);
 511                                 if (xa != None) {
 512                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 513
 514                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 515                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 516                                 }
 517                         }
 518                 }
 519
 520                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 521                                 window.window);
 522                 fflush(stderr);
 523
 524                 XMapWindow(display, window.window);
 525
 526         } else
 527 #endif /* OWN_WINDOW */
 528         {
 529                 XWindowAttributes attrs;
 530
 531                 if (!window.window) {
 532                         window.window = find_desktop_window(&window.root, &window.desktop);
 533                 }
 534
 535                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 536                         window.width = attrs.width;
 537                         window.height = attrs.height;
 538                 }
 539
 540                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 541         }
 542
 543         /* Drawable is same as window. This may be changed by double buffering. */
 544         window.drawable = window.window;
 545
 546 #ifdef HAVE_XDBE
 547         if (use_xdbe) {
 548                 int major, minor;
 549
 550                 if (!XdbeQueryExtension(display, &major, &minor)) {
 551                         use_xdbe = 0;
 552                 } else {
 553                         window.back_buffer = XdbeAllocateBackBufferName(display,
 554                                         window.window, XdbeBackground);
 555                         if (window.back_buffer != None) {
 556                                 window.drawable = window.back_buffer;
 557                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 558                         } else {
 559                                 use_xdbe = 0;
 560                         }
 561                 }
 562                 if (!use_xdbe) {
 563                         NORM_ERR("failed to set up double buffer");
 564                 }
 565         }
 566         if (!use_xdbe) {
 567                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 568         }
 569 #endif
 570 #ifdef IMLIB2
 571         {
 572                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 573         }
 574 #endif /* IMLIB2 */
 575         XFlush(display);
 576
 577         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 578 #ifdef OWN_WINDOW
 579                         | (own_window ? (StructureNotifyMask |
 580                                         ButtonPressMask | ButtonReleaseMask) : 0)
 581 #endif
 582                         );
 583 }
 584
 585 static Window find_subwindow(Window win, int w, int h)
 586 {
 587         unsigned int i, j;
 588         Window troot, parent, *children;
 589         unsigned int n;
 590
 591         /* search subwindows with same size as display or work area */
 592
 593         for (i = 0; i < 10; i++) {
 594                 XQueryTree(display, win, &troot, &parent, &children, &n);
 595
 596                 for (j = 0; j < n; j++) {
 597                         XWindowAttributes attrs;
 598
 599                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 600                                 /* Window must be mapped and same size as display or
 601                                  * work space */
 602                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 603                                                                 && attrs.height == display_height)
 604                                                         || (attrs.width == w && attrs.height == h))) {
 605                                         win = children[j];
 606                                         break;
 607                                 }
 608                         }
 609                 }
 610
 611                 XFree(children);
 612                 if (j == n) {
 613                         break;
 614                 }
 615         }
 616
 617         return win;
 618 }
 619
 620 void create_gc(void)
 621 {
 622         XGCValues values;
 623
 624         values.graphics_exposures = 0;
 625         values.function = GXcopy;
 626         window.gc = XCreateGC(display, window.drawable,
 627                         GCFunction | GCGraphicsExposures, &values);
 628 }
 629
 630 //Get current desktop number
 631 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 632 {
 633         Atom actual_type;
 634         int actual_format;
 635         unsigned long nitems;
 636         unsigned long bytes_after;
 637         unsigned char *prop = NULL;
 638         struct information *current_info = &info;
 639
 640         if (atom == None) return;
 641
 642         if ( (XGetWindowProperty( current_display, root, atom,
 643                                         0, 1L, False, XA_CARDINAL,
 644                                         &actual_type, &actual_format, &nitems,
 645                                         &bytes_after, &prop ) == Success ) &&
 646                         (actual_type == XA_CARDINAL) &&
 647                         (nitems == 1L) && (actual_format == 32) ) {
 648                 current_info->x11.desktop.current = prop[0]+1;
 649         }
 650         if(prop) {
 651                 XFree(prop);
 652         }
 653 }
 654
 655 //Get total number of available desktops
 656 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 657 {
 658         Atom actual_type;
 659         int actual_format;
 660         unsigned long nitems;
 661         unsigned long bytes_after;
 662         unsigned char *prop = NULL;
 663         struct information *current_info = &info;
 664
 665         if (atom == None) return;
 666
 667         if ( (XGetWindowProperty( current_display, root, atom,
 668                                         0, 1L, False, XA_CARDINAL,
 669                                         &actual_type, &actual_format, &nitems,
 670                                         &bytes_after, &prop ) == Success ) &&
 671                         (actual_type == XA_CARDINAL) &&
 672                         (nitems == 1L) && (actual_format == 32) ) {
 673                 current_info->x11.desktop.number = prop[0];
 674         }
 675         if(prop) {
 676                 XFree(prop);
 677         }
 678 }
 679
 680 //Get all desktop names
 681 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 682 {
 683         Atom actual_type;
 684         int actual_format;
 685         unsigned long nitems;
 686         unsigned long bytes_after;
 687         unsigned char *prop = NULL;
 688         struct information *current_info = &info;
 689
 690         if (atom == None) return;
 691
 692         if ( (XGetWindowProperty( current_display, root, atom,
 693                                         0, (~0L), False, ATOM(UTF8_STRING),
 694                                         &actual_type, &actual_format, &nitems,
 695                                         &bytes_after, &prop ) == Success ) &&
 696                         (actual_type == ATOM(UTF8_STRING)) &&
 697                         (nitems > 0L) && (actual_format == 8) ) {
 698
 699                 if(current_info->x11.desktop.all_names) {
 700                         free(current_info->x11.desktop.all_names);
 701                         current_info->x11.desktop.all_names = NULL;
 702                 }
 703                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 704                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 705                 current_info->x11.desktop.nitems = nitems;
 706         }
 707         if(prop) {
 708                 XFree(prop);
 709         }
 710 }
 711
 712 //Get current desktop name
 713 static inline void get_x11_desktop_current_name(char *names)
 714 {
 715         struct information *current_info = &info;
 716         unsigned int i = 0, j = 0;
 717         int k = 0;
 718
 719         while ( i < current_info->x11.desktop.nitems ) {
 720                 if ( names[i++] == '\0' ) {
 721                         if ( ++k == current_info->x11.desktop.current ) {
 722                                 if (current_info->x11.desktop.name) {
 723                                         free(current_info->x11.desktop.name);
 724                                         current_info->x11.desktop.name = NULL;
 725                                 }
 726                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 727                                 //desktop names can be empty but should always be not null
 728                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 729                                 break;
 730                         }
 731                         j = i;
 732                 }
 733         }
 734 }
 735
 736 void get_x11_desktop_info(Display *current_display, Atom atom)
 737 {
 738         Window root;
 739         static Atom atom_current, atom_number, atom_names;
 740         struct information *current_info = &info;
 741         XWindowAttributes window_attributes;
 742
 743         root = RootWindow(current_display, current_info->x11.monitor.current);
 744
 745         /* Check if we initialise else retrieve changed property */
 746         if (atom == 0) {
 747                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 748                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 749                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 750                 get_x11_desktop_current(current_display, root, atom_current);
 751                 get_x11_desktop_number(current_display, root, atom_number);
 752                 get_x11_desktop_names(current_display, root, atom_names);
 753                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 754
 755                 /* Set the PropertyChangeMask on the root window, if not set */
 756                 XGetWindowAttributes(display, root, &window_attributes);
 757                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 758                         XSetWindowAttributes attributes;
 759                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 760                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 761                         XGetWindowAttributes(display, root, &window_attributes);
 762                 }
 763         } else {
 764                 if (atom == atom_current) {
 765                         get_x11_desktop_current(current_display, root, atom_current);
 766                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 767                 } else if (atom == atom_number) {
 768                         get_x11_desktop_number(current_display, root, atom_number);
 769                 } else if (atom == atom_names) {
 770                         get_x11_desktop_names(current_display, root, atom_names);
 771                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 772                 }
 773         }
 774 }
 775
 776 void update_x11info(void)
 777 {
 778         struct information *current_info = &info;
 779         if (!x_initialised == YES)
 780                 return;
 781         current_info->x11.monitor.number = XScreenCount(display);
 782         current_info->x11.monitor.current = XDefaultScreen(display);
 783 }
 784
 785 #ifdef OWN_WINDOW
 786 /* reserve window manager space */
 787 void set_struts(int sidenum)
 788 {
 789         Atom strut;
 790         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 791                 /* reserve space at left, right, top, bottom */
 792                 signed long sizes[12] = {0};
 793                 int i;
 794
 795                 /* define strut depth */
 796                 switch (sidenum) {
 797                         case 0:
 798                                 /* left side */
 799                                 sizes[0] = window.x + window.width;
 800                                 break;
 801                         case 1:
 802                                 /* right side */
 803                                 sizes[1] = display_width - window.x;
 804                                 break;
 805                         case 2:
 806                                 /* top side */
 807                                 sizes[2] = window.y + window.height;
 808                                 break;
 809                         case 3:
 810                                 /* bottom side */
 811                                 sizes[3] = display_height - window.y;
 812                                 break;
 813                 }
 814
 815                 /* define partial strut length */
 816                 if (sidenum <= 1) {
 817                         sizes[4 + (sidenum*2)] = window.y;
 818                         sizes[5 + (sidenum*2)] = window.y + window.height;
 819                 } else if (sidenum <= 3) {
 820                         sizes[4 + (sidenum*2)] = window.x;
 821                         sizes[5 + (sidenum*2)] = window.x + window.width;
 822                 }
 823
 824                 /* check constraints */
 825                 for (i = 0; i < 12; i++) {
 826                         if (sizes[i] < 0) {
 827                                 sizes[i] = 0;
 828                         } else {
 829                                 if (i <= 1 || i >= 8) {
 830                                         if (sizes[i] > display_width) {
 831                                                 sizes[i] = display_width;
 832                                         }
 833                                 } else {
 834                                         if (sizes[i] > display_height) {
 835                                                 sizes[i] = display_height;
 836                                         }
 837                                 }
 838                         }
 839                 }
 840
 841                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 842                                 PropModeReplace, (unsigned char *) &sizes, 4);
 843
 844                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 845                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 846                                         PropModeReplace, (unsigned char *) &sizes, 12);
 847                 }
 848         }
 849 }
 850 #endif /* OWN_WINDOW */
 851
 852 #ifdef HAVE_XDBE
 853 void xdbe_swap_buffers(void)
 854 {
 855         if (use_xdbe) {
 856                 XdbeSwapInfo swap;
 857
 858                 swap.swap_window = window.window;
 859                 swap.swap_action = XdbeBackground;
 860                 XdbeSwapBuffers(display, &swap, 1);
 861         }
 862 }
 863 #endif /* HAVE_XDBE */
 864