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 /* if no argb visual is configured sets background to ParentRelative for the Window and all parents,
 181    else real transparency is used */
 182 void set_transparent_background(Window win, int alpha)
 183 {
 184         static int colour_set = -1;
 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 }
 262
 263 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 264                 char **argv, int argc)
 265 {
 266         /* There seems to be some problems with setting transparent background
 267          * (on fluxbox this time). It doesn't happen always and I don't know why it
 268          * happens but I bet the bug is somewhere here. */
 269         set_transparent = set_trans;
 270         background_colour = back_colour;
 271         window_created = 1;
 272
 273 #ifdef OWN_WINDOW
 274         if (own_window) {
 275                 int depth = 0, flags;
 276                 Visual *visual = NULL;
 277
 278                 if (!find_desktop_window(&window.root, &window.desktop)) {
 279                         return;
 280                 }
 281
 282 #ifdef USE_ARGB
 283                 if (use_argb_visual && get_argb_visual(&visual, &depth)) {
 284                         have_argb_visual = 1;
 285                         window.visual = visual;
 286                         window.colourmap = XCreateColormap(display,
 287                                 DefaultRootWindow(display), window.visual, AllocNone);
 288                 } else {
 289 #endif /* USE_ARGB */
 290                         window.visual = DefaultVisual(display, screen);
 291                         window.colourmap = DefaultColormap(display, screen);
 292                         depth = CopyFromParent;
 293                         visual = CopyFromParent;
 294 #ifdef USE_ARGB
 295                 }
 296 #endif /* USE_ARGB */
 297
 298                 if (window.type == TYPE_OVERRIDE) {
 299
 300                         /* An override_redirect True window.
 301                          * No WM hints or button processing needed. */
 302                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 303                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 304                                 True, 0, 0 };
 305 #ifdef USE_ARGB
 306                         if (have_argb_visual) {
 307                                 attrs.colormap = window.colourmap;
 308                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 309                         } else {
 310 #endif /* USE_ARGB */
 311                                 flags = CWBackPixel | CWOverrideRedirect;
 312 #ifdef USE_ARGB
 313                         }
 314 #endif /* USE_ARGB */
 315
 316                         /* Parent is desktop window (which might be a child of root) */
 317                         window.window = XCreateWindow(display, window.desktop, window.x,
 318                                         window.y, w, h, 0, depth, InputOutput, visual,
 319                                         flags, &attrs);
 320
 321                         XLowerWindow(display, window.window);
 322
 323                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 324                         fflush(stderr);
 325                 } else { /* window.type != TYPE_OVERRIDE */
 326
 327                         /* A window managed by the window manager.
 328                          * Process hints and buttons. */
 329                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 330                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 331                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 332
 333                         XClassHint classHint;
 334                         XWMHints wmHint;
 335                         Atom xa;
 336
 337 #ifdef USE_ARGB
 338                         if (have_argb_visual) {
 339                                 attrs.colormap = window.colourmap;
 340                                 flags = CWBorderPixel | CWColormap | CWOverrideRedirect;
 341                         } else {
 342 #endif /* USE_ARGB */
 343                                 flags = CWBackPixel | CWOverrideRedirect;
 344 #ifdef USE_ARGB
 345                         }
 346 #endif /* USE_ARGB */
 347
 348                         if (window.type == TYPE_DOCK) {
 349                                 window.x = window.y = 0;
 350                         }
 351                         /* Parent is root window so WM can take control */
 352                         window.window = XCreateWindow(display, window.root, window.x,
 353                                         window.y, w, h, 0, depth, InputOutput, visual,
 354                                         flags, &attrs);
 355
 356                         classHint.res_name = window.class_name;
 357                         classHint.res_class = classHint.res_name;
 358
 359                         wmHint.flags = InputHint | StateHint;
 360                         /* allow decorated windows to be given input focus by WM */
 361                         wmHint.input =
 362                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 363                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 364                                 wmHint.initial_state = WithdrawnState;
 365                         } else {
 366                                 wmHint.initial_state = NormalState;
 367                         }
 368
 369                         XmbSetWMProperties(display, window.window, NULL, NULL, argv,
 370                                         argc, NULL, &wmHint, &classHint);
 371                         XStoreName(display, window.window, window.title);
 372
 373                         /* Sets an empty WM_PROTOCOLS property */
 374                         XSetWMProtocols(display, window.window, NULL, 0);
 375
 376                         /* Set window type */
 377                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 378                                 Atom prop;
 379
 380                                 switch (window.type) {
 381                                         case TYPE_DESKTOP:
 382                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 383                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 384                                                 fflush(stderr);
 385                                                 break;
 386                                         case TYPE_DOCK:
 387                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 388                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 389                                                 fflush(stderr);
 390                                                 break;
 391                                         case TYPE_PANEL:
 392                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 393                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 394                                                 fflush(stderr);
 395                                                 break;
 396                                         case TYPE_NORMAL:
 397                                         default:
 398                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 399                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 400                                                 fflush(stderr);
 401                                                 break;
 402                                 }
 403                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 404                                                 PropModeReplace, (unsigned char *) &prop, 1);
 405                         }
 406
 407                         /* Set desired hints */
 408
 409                         /* Window decorations */
 410                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 411                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 412                                    fflush(stderr); */
 413
 414                                 xa = ATOM(_MOTIF_WM_HINTS);
 415                                 if (xa != None) {
 416                                         long prop[5] = { 2, 0, 0, 0, 0 };
 417                                         XChangeProperty(display, window.window, xa, xa, 32,
 418                                                         PropModeReplace, (unsigned char *) prop, 5);
 419                                 }
 420                         }
 421
 422                         /* Below other windows */
 423                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 424                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 425                                    fflush(stderr); */
 426
 427                                 xa = ATOM(_WIN_LAYER);
 428                                 if (xa != None) {
 429                                         long prop = 0;
 430
 431                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 432                                                         PropModeAppend, (unsigned char *) &prop, 1);
 433                                 }
 434
 435                                 xa = ATOM(_NET_WM_STATE);
 436                                 if (xa != None) {
 437                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 438
 439                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 440                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 441                                 }
 442                         }
 443
 444                         /* Above other windows */
 445                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 446                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 447                                    fflush(stderr); */
 448
 449                                 xa = ATOM(_WIN_LAYER);
 450                                 if (xa != None) {
 451                                         long prop = 6;
 452
 453                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 454                                                         PropModeAppend, (unsigned char *) &prop, 1);
 455                                 }
 456
 457                                 xa = ATOM(_NET_WM_STATE);
 458                                 if (xa != None) {
 459                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 460
 461                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 462                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 463                                 }
 464                         }
 465
 466                         /* Sticky */
 467                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 468                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 469                                    fflush(stderr); */
 470
 471                                 xa = ATOM(_NET_WM_DESKTOP);
 472                                 if (xa != None) {
 473                                         CARD32 xa_prop = 0xFFFFFFFF;
 474
 475                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 476                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 477                                 }
 478
 479                                 xa = ATOM(_NET_WM_STATE);
 480                                 if (xa != None) {
 481                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 482
 483                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 484                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 485                                 }
 486                         }
 487
 488                         /* Skip taskbar */
 489                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 490                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 491                                    fflush(stderr); */
 492
 493                                 xa = ATOM(_NET_WM_STATE);
 494                                 if (xa != None) {
 495                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 496
 497                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 498                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 499                                 }
 500                         }
 501
 502                         /* Skip pager */
 503                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 504                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 505                                    fflush(stderr); */
 506
 507                                 xa = ATOM(_NET_WM_STATE);
 508                                 if (xa != None) {
 509                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 510
 511                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 512                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 513                                 }
 514                         }
 515                 }
 516
 517                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 518                                 window.window);
 519                 fflush(stderr);
 520
 521                 XMapWindow(display, window.window);
 522
 523         } else
 524 #endif /* OWN_WINDOW */
 525         {
 526                 XWindowAttributes attrs;
 527
 528                 if (!window.window) {
 529                         window.window = find_desktop_window(&window.root, &window.desktop);
 530                 }
 531
 532                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 533                         window.width = attrs.width;
 534                         window.height = attrs.height;
 535                 }
 536
 537                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 538         }
 539
 540         /* Drawable is same as window. This may be changed by double buffering. */
 541         window.drawable = window.window;
 542
 543 #ifdef HAVE_XDBE
 544         if (use_xdbe) {
 545                 int major, minor;
 546
 547                 if (!XdbeQueryExtension(display, &major, &minor)) {
 548                         use_xdbe = 0;
 549                 } else {
 550                         window.back_buffer = XdbeAllocateBackBufferName(display,
 551                                         window.window, XdbeBackground);
 552                         if (window.back_buffer != None) {
 553                                 window.drawable = window.back_buffer;
 554                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 555                         } else {
 556                                 use_xdbe = 0;
 557                         }
 558                 }
 559                 if (!use_xdbe) {
 560                         NORM_ERR("failed to set up double buffer");
 561                 }
 562         }
 563         if (!use_xdbe) {
 564                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 565         }
 566 #endif
 567 #ifdef IMLIB2
 568         {
 569                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 570         }
 571 #endif /* IMLIB2 */
 572         XFlush(display);
 573
 574         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 575 #ifdef OWN_WINDOW
 576                         | (own_window ? (StructureNotifyMask |
 577                                         ButtonPressMask | ButtonReleaseMask) : 0)
 578 #endif
 579                         );
 580 }
 581
 582 static Window find_subwindow(Window win, int w, int h)
 583 {
 584         unsigned int i, j;
 585         Window troot, parent, *children;
 586         unsigned int n;
 587
 588         /* search subwindows with same size as display or work area */
 589
 590         for (i = 0; i < 10; i++) {
 591                 XQueryTree(display, win, &troot, &parent, &children, &n);
 592
 593                 for (j = 0; j < n; j++) {
 594                         XWindowAttributes attrs;
 595
 596                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 597                                 /* Window must be mapped and same size as display or
 598                                  * work space */
 599                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 600                                                                 && attrs.height == display_height)
 601                                                         || (attrs.width == w && attrs.height == h))) {
 602                                         win = children[j];
 603                                         break;
 604                                 }
 605                         }
 606                 }
 607
 608                 XFree(children);
 609                 if (j == n) {
 610                         break;
 611                 }
 612         }
 613
 614         return win;
 615 }
 616
 617 void create_gc(void)
 618 {
 619         XGCValues values;
 620
 621         values.graphics_exposures = 0;
 622         values.function = GXcopy;
 623         window.gc = XCreateGC(display, window.drawable,
 624                         GCFunction | GCGraphicsExposures, &values);
 625 }
 626
 627 //Get current desktop number
 628 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 629 {
 630         Atom actual_type;
 631         int actual_format;
 632         unsigned long nitems;
 633         unsigned long bytes_after;
 634         unsigned char *prop = NULL;
 635         struct information *current_info = &info;
 636
 637         if (atom == None) return;
 638
 639         if ( (XGetWindowProperty( current_display, root, atom,
 640                                         0, 1L, False, XA_CARDINAL,
 641                                         &actual_type, &actual_format, &nitems,
 642                                         &bytes_after, &prop ) == Success ) &&
 643                         (actual_type == XA_CARDINAL) &&
 644                         (nitems == 1L) && (actual_format == 32) ) {
 645                 current_info->x11.desktop.current = prop[0]+1;
 646         }
 647         if(prop) {
 648                 XFree(prop);
 649         }
 650 }
 651
 652 //Get total number of available desktops
 653 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 654 {
 655         Atom actual_type;
 656         int actual_format;
 657         unsigned long nitems;
 658         unsigned long bytes_after;
 659         unsigned char *prop = NULL;
 660         struct information *current_info = &info;
 661
 662         if (atom == None) return;
 663
 664         if ( (XGetWindowProperty( current_display, root, atom,
 665                                         0, 1L, False, XA_CARDINAL,
 666                                         &actual_type, &actual_format, &nitems,
 667                                         &bytes_after, &prop ) == Success ) &&
 668                         (actual_type == XA_CARDINAL) &&
 669                         (nitems == 1L) && (actual_format == 32) ) {
 670                 current_info->x11.desktop.number = prop[0];
 671         }
 672         if(prop) {
 673                 XFree(prop);
 674         }
 675 }
 676
 677 //Get all desktop names
 678 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 679 {
 680         Atom actual_type;
 681         int actual_format;
 682         unsigned long nitems;
 683         unsigned long bytes_after;
 684         unsigned char *prop = NULL;
 685         struct information *current_info = &info;
 686
 687         if (atom == None) return;
 688
 689         if ( (XGetWindowProperty( current_display, root, atom,
 690                                         0, (~0L), False, ATOM(UTF8_STRING),
 691                                         &actual_type, &actual_format, &nitems,
 692                                         &bytes_after, &prop ) == Success ) &&
 693                         (actual_type == ATOM(UTF8_STRING)) &&
 694                         (nitems > 0L) && (actual_format == 8) ) {
 695
 696                 if(current_info->x11.desktop.all_names) {
 697                         free(current_info->x11.desktop.all_names);
 698                         current_info->x11.desktop.all_names = NULL;
 699                 }
 700                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 701                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 702                 current_info->x11.desktop.nitems = nitems;
 703         }
 704         if(prop) {
 705                 XFree(prop);
 706         }
 707 }
 708
 709 //Get current desktop name
 710 static inline void get_x11_desktop_current_name(char *names)
 711 {
 712         struct information *current_info = &info;
 713         unsigned int i = 0, j = 0;
 714         int k = 0;
 715
 716         while ( i < current_info->x11.desktop.nitems ) {
 717                 if ( names[i++] == '\0' ) {
 718                         if ( ++k == current_info->x11.desktop.current ) {
 719                                 if (current_info->x11.desktop.name) {
 720                                         free(current_info->x11.desktop.name);
 721                                         current_info->x11.desktop.name = NULL;
 722                                 }
 723                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 724                                 //desktop names can be empty but should always be not null
 725                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 726                                 break;
 727                         }
 728                         j = i;
 729                 }
 730         }
 731 }
 732
 733 void get_x11_desktop_info(Display *current_display, Atom atom)
 734 {
 735         Window root;
 736         static Atom atom_current, atom_number, atom_names;
 737         struct information *current_info = &info;
 738         XWindowAttributes window_attributes;
 739
 740         root = RootWindow(current_display, current_info->x11.monitor.current);
 741
 742         /* Check if we initialise else retrieve changed property */
 743         if (atom == 0) {
 744                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 745                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 746                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 747                 get_x11_desktop_current(current_display, root, atom_current);
 748                 get_x11_desktop_number(current_display, root, atom_number);
 749                 get_x11_desktop_names(current_display, root, atom_names);
 750                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 751
 752                 /* Set the PropertyChangeMask on the root window, if not set */
 753                 XGetWindowAttributes(display, root, &window_attributes);
 754                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 755                         XSetWindowAttributes attributes;
 756                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 757                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 758                         XGetWindowAttributes(display, root, &window_attributes);
 759                 }
 760         } else {
 761                 if (atom == atom_current) {
 762                         get_x11_desktop_current(current_display, root, atom_current);
 763                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 764                 } else if (atom == atom_number) {
 765                         get_x11_desktop_number(current_display, root, atom_number);
 766                 } else if (atom == atom_names) {
 767                         get_x11_desktop_names(current_display, root, atom_names);
 768                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 769                 }
 770         }
 771 }
 772
 773 void update_x11info(void)
 774 {
 775         struct information *current_info = &info;
 776         if (!x_initialised == YES)
 777                 return;
 778         current_info->x11.monitor.number = XScreenCount(display);
 779         current_info->x11.monitor.current = XDefaultScreen(display);
 780 }
 781
 782 #ifdef OWN_WINDOW
 783 /* reserve window manager space */
 784 void set_struts(int sidenum)
 785 {
 786         Atom strut;
 787         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 788                 /* reserve space at left, right, top, bottom */
 789                 signed long sizes[12] = {0};
 790                 int i;
 791
 792                 /* define strut depth */
 793                 switch (sidenum) {
 794                         case 0:
 795                                 /* left side */
 796                                 sizes[0] = window.x + window.width;
 797                                 break;
 798                         case 1:
 799                                 /* right side */
 800                                 sizes[1] = display_width - window.x;
 801                                 break;
 802                         case 2:
 803                                 /* top side */
 804                                 sizes[2] = window.y + window.height;
 805                                 break;
 806                         case 3:
 807                                 /* bottom side */
 808                                 sizes[3] = display_height - window.y;
 809                                 break;
 810                 }
 811
 812                 /* define partial strut length */
 813                 if (sidenum <= 1) {
 814                         sizes[4 + (sidenum*2)] = window.y;
 815                         sizes[5 + (sidenum*2)] = window.y + window.height;
 816                 } else if (sidenum <= 3) {
 817                         sizes[4 + (sidenum*2)] = window.x;
 818                         sizes[5 + (sidenum*2)] = window.x + window.width;
 819                 }
 820
 821                 /* check constraints */
 822                 for (i = 0; i < 12; i++) {
 823                         if (sizes[i] < 0) {
 824                                 sizes[i] = 0;
 825                         } else {
 826                                 if (i <= 1 || i >= 8) {
 827                                         if (sizes[i] > display_width) {
 828                                                 sizes[i] = display_width;
 829                                         }
 830                                 } else {
 831                                         if (sizes[i] > display_height) {
 832                                                 sizes[i] = display_height;
 833                                         }
 834                                 }
 835                         }
 836                 }
 837
 838                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 839                                 PropModeReplace, (unsigned char *) &sizes, 4);
 840
 841                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 842                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 843                                         PropModeReplace, (unsigned char *) &sizes, 12);
 844                 }
 845         }
 846 }
 847 #endif /* OWN_WINDOW */
 848
 849 #ifdef HAVE_XDBE
 850 void xdbe_swap_buffers(void)
 851 {
 852         if (use_xdbe) {
 853                 XdbeSwapInfo swap;
 854
 855                 swap.swap_window = window.window;
 856                 swap.swap_action = XdbeBackground;
 857                 XdbeSwapBuffers(display, &swap, 1);
 858         }
 859 }
 860 #endif /* HAVE_XDBE */
 861