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

   1 /*
   2  * Conky, a system monitor, based on torsmo
   3  *
   4  * This program is licensed under BSD license, read COPYING
   5  *
   6  *  $Id$
   7  */
   8
   9
  10 #include "conky.h"
  11
  12 #ifdef X11
  13 #include <X11/Xlib.h>
  14 #include <X11/Xatom.h>
  15 #include <X11/Xmd.h>
  16 #include <X11/Xutil.h>
  17 #ifdef XFT
  18 #include <X11/Xft/Xft.h>
  19 #endif
  20
  21 #include <stdio.h>
  22
  23 #ifdef XDBE
  24 int use_xdbe;
  25 #endif
  26
  27 #ifdef XFT
  28 int use_xft = 0;
  29 #endif
  30
  31 #define WINDOW_NAME_FMT "%s - conky"
  32
  33 /* some basic X11 stuff */
  34 Display *display;
  35 int display_width;
  36 int display_height;
  37 int screen;
  38 static int set_transparent;
  39 static int background_colour;
  40
  41 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  42 int workarea[4];
  43
  44 /* Window stuff */
  45 struct conky_window window;
  46
  47 /* local prototypes */
  48 static void update_workarea();
  49 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  50 static Window find_subwindow(Window win, int w, int h);
  51
  52 /* X11 initializer */
  53 void init_X11()
  54 {
  55         if ((display = XOpenDisplay(0)) == NULL)
  56                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  57
  58         screen = DefaultScreen(display);
  59         display_width = DisplayWidth(display, screen);
  60         display_height = DisplayHeight(display, screen);
  61
  62         update_workarea();
  63 }
  64
  65 static void update_workarea()
  66 {
  67         Window root = RootWindow(display, screen);
  68         unsigned long nitems, bytes;
  69         unsigned char *buf = NULL;
  70         Atom type;
  71         int format;
  72
  73         /* default work area is display */
  74         workarea[0] = 0;
  75         workarea[1] = 0;
  76         workarea[2] = display_width;
  77         workarea[3] = display_height;
  78
  79         /* get current desktop */
  80         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP),
  81                                0, 1, False, XA_CARDINAL, &type, &format,
  82                                &nitems, &bytes, &buf) == Success
  83             && type == XA_CARDINAL && nitems > 0) {
  84
  85                 //Currently unused
  86                 /*  long desktop = * (long *) buf; */
  87
  88                 XFree(buf);
  89                 buf = 0;
  90
  91         }
  92
  93         if (buf) {
  94                 XFree(buf);
  95                 buf = 0;
  96         }
  97 }
  98
  99 /* Find root window and desktop window.  Return desktop window on success,
 100  * and set root and desktop byref return values.  Return 0 on failure. */
 101 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 102 {
 103         Atom type;
 104         int format, i;
 105         unsigned long nitems, bytes;
 106         unsigned int n;
 107         Window root = RootWindow(display, screen);
 108         Window win = root;
 109         Window troot, parent, *children;
 110         unsigned char *buf = NULL;
 111
 112         if (!p_root || !p_desktop)
 113             return(0);
 114
 115         /* some window managers set __SWM_VROOT to some child of root window */
 116
 117         XQueryTree(display, root, &troot, &parent, &children, &n);
 118         for (i = 0; i < (int) n; i++) {
 119                 if (XGetWindowProperty
 120                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 121                      XA_WINDOW, &type, &format, &nitems, &bytes,
 122                      &buf) == Success && type == XA_WINDOW) {
 123                         win = *(Window *) buf;
 124                         XFree(buf);
 125                         XFree(children);
 126                         fprintf(stderr,
 127                                 "Conky: desktop window (%lx) found from __SWM_VROOT property\n", win);
 128                         fflush(stderr);
 129                         *p_root=win;
 130                         *p_desktop=win;
 131                         return win;
 132                 }
 133
 134                 if (buf) {
 135                         XFree(buf);
 136                         buf = 0;
 137                 }
 138         }
 139         XFree(children);
 140
 141         /* get subwindows from root */
 142         win = find_subwindow(root, -1, -1);
 143
 144         update_workarea();
 145
 146         win = find_subwindow(win, workarea[2], workarea[3]);
 147
 148         if (buf) {
 149                 XFree(buf);
 150                 buf = 0;
 151         }
 152
 153         if (win != root)
 154                 fprintf(stderr,
 155                         "Conky: desktop window (%lx) is subwindow of root window (%lx)\n",win,root);
 156         else
 157                 fprintf(stderr, "Conky: desktop window (%lx) is root window\n",win);
 158
 159         fflush(stderr);
 160
 161         *p_root=root;
 162         *p_desktop=win;
 163
 164         return win;
 165 }
 166
 167 /* sets background to ParentRelative for the Window and all parents */
 168 inline void set_transparent_background(Window win)
 169 {
 170         static int colour_set = -1;
 171         if (set_transparent) {
 172                 Window parent = win;
 173                 unsigned int i;
 174                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 175                         Window r, *children;
 176                         unsigned int n;
 177
 178                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 179
 180                         XQueryTree(display, parent, &r, &parent, &children, &n);
 181                         XFree(children);
 182                         }
 183         } else if (colour_set != background_colour) {
 184                 XSetWindowBackground(display, win, background_colour);
 185                 colour_set = background_colour;
 186 }
 187         //XClearWindow(display, win); not sure why this was here
 188 }
 189
 190 void init_window(int own_window, int w, int h, int set_trans, int back_colour, char * nodename,
 191                  char **argv, int argc)
 192 {
 193         /* There seems to be some problems with setting transparent background (on
 194          * fluxbox this time). It doesn't happen always and I don't know why it
 195          * happens but I bet the bug is somewhere here. */
 196         set_transparent = set_trans;
 197         background_colour = back_colour;
 198
 199         nodename = (char *)nodename;
 200
 201 #ifdef OWN_WINDOW
 202         if (own_window) {
 203                 {
 204                         /* Allow WM control of conky again.  Shielding conky from the WM
 205                          * via override redirect creates more problems than it's worth and
 206                          * makes it impossible to use tools like devilspie to manage the
 207                          * conky windows beyond the parameters we offer.  ButtonPress
 208                          * events are now explicitly forwarded to the desktop window. */
 209                         XSetWindowAttributes attrs = {
 210                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 211                                 StructureNotifyMask|ExposureMask|ButtonPressMask,
 212                                 0L,False,0,0 };
 213
 214                         XClassHint classHint;
 215                         XWMHints wmHint;
 216                         Atom xa;
 217                         char window_title[256];
 218
 219                         /* We want to parent the window to the root so it's under WM control,
 220                          * but we want to forward button clicks to the desktop window for menus.
 221                          * On some desktop systems, the desktop window != root window. */
 222                         if ( !find_desktop_window( &window.root, &window.desktop ) )
 223                             return;
 224
 225                         window.window = XCreateWindow(display, window.root,
 226                                                       window.x, window.y, w, h, 0,
 227                                                       CopyFromParent,
 228                                                       InputOutput,
 229                                                       CopyFromParent,
 230                                                       CWBackPixel|CWOverrideRedirect,
 231                                                       &attrs);
 232
 233                         fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 234                         fflush(stderr);
 235
 236                         classHint.res_name = window.wm_class_name;
 237                         classHint.res_class = classHint.res_name;
 238
 239                         wmHint.flags = InputHint | StateHint;
 240                         wmHint.input = False;
 241                         wmHint.initial_state = NormalState;
 242
 243                         sprintf(window_title,WINDOW_NAME_FMT,nodename);
 244
 245                         XmbSetWMProperties (display, window.window, window_title, NULL,
 246                                             argv, argc,
 247                                             NULL, &wmHint, &classHint);
 248
 249                         /* Sets an empty WM_PROTOCOLS property */
 250                         XSetWMProtocols(display,window.window,NULL,0);
 251
 252
 253                         /* Set NORMAL window type for _NET_WM_WINDOW_TYPE. */
 254                         xa = ATOM(_NET_WM_WINDOW_TYPE);
 255                         if (xa != None) {
 256                                 Atom prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 257                                 XChangeProperty(display, window.window, xa,
 258                                                 XA_ATOM, 32,
 259                                                 PropModeReplace,
 260                                                 (unsigned char *) &prop,
 261                                                 1);
 262                         }
 263
 264                         /* Set desired hints */
 265
 266                         /* Window decorations */
 267                         if (TEST_HINT(window.hints,HINT_UNDECORATED)) {
 268                             fprintf(stderr, "Conky: hint - undecorated\n"); fflush(stderr);
 269
 270                             xa = ATOM(_MOTIF_WM_HINTS);
 271                             if (xa != None) {
 272                                 long prop[5] = { 2, 0, 0, 0, 0 };
 273                                 XChangeProperty(display, window.window, xa,
 274                                                 xa, 32, PropModeReplace,
 275                                                 (unsigned char *) prop, 5);
 276                             }
 277                         }
 278
 279                         /* Below other windows */
 280                         if (TEST_HINT(window.hints,HINT_BELOW)) {
 281                             fprintf(stderr, "Conky: hint - below\n"); fflush(stderr);
 282
 283                             xa = ATOM(_WIN_LAYER);
 284                             if (xa != None) {
 285                                 long prop = 0;
 286                                 XChangeProperty(display, window.window, xa,
 287                                                 XA_CARDINAL, 32,
 288                                                 PropModeAppend,
 289                                                 (unsigned char *) &prop, 1);
 290                             }
 291
 292                             xa = ATOM(_NET_WM_STATE);
 293                             if (xa != None) {
 294                                 Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 295                                 XChangeProperty(display, window.window, xa,
 296                                         XA_ATOM, 32,
 297                                         PropModeAppend,
 298                                         (unsigned char *) &xa_prop,
 299                                         1);
 300                             }
 301                         }
 302
 303                         /* Above other windows */
 304                         if (TEST_HINT(window.hints,HINT_ABOVE)) {
 305                             fprintf(stderr, "Conky: hint - above\n"); fflush(stderr);
 306
 307                             xa = ATOM(_WIN_LAYER);
 308                             if (xa != None) {
 309                                 long prop = 6;
 310                                 XChangeProperty(display, window.window, xa,
 311                                                 XA_CARDINAL, 32,
 312                                                 PropModeAppend,
 313                                                 (unsigned char *) &prop, 1);
 314                             }
 315
 316                             xa = ATOM(_NET_WM_STATE);
 317                             if (xa != None) {
 318                                 Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 319                                 XChangeProperty(display, window.window, xa,
 320                                         XA_ATOM, 32,
 321                                         PropModeAppend,
 322                                         (unsigned char *) &xa_prop,
 323                                         1);
 324                             }
 325                         }
 326
 327                         /* Sticky */
 328                         if (TEST_HINT(window.hints,HINT_STICKY)) {
 329                             fprintf(stderr, "Conky: hint - sticky\n"); fflush(stderr);
 330
 331                             xa = ATOM(_NET_WM_DESKTOP);
 332                             if (xa != None) {
 333                                 CARD32 xa_prop = 0xFFFFFFFF;
 334                                 XChangeProperty(display, window.window, xa,
 335                                         XA_CARDINAL, 32,
 336                                         PropModeAppend,
 337                                         (unsigned char *) &xa_prop,
 338                                         1);
 339                             }
 340
 341                             xa = ATOM(_NET_WM_STATE);
 342                             if (xa != None) {
 343                                 Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 344                                 XChangeProperty(display, window.window, xa,
 345                                         XA_ATOM, 32,
 346                                         PropModeAppend,
 347                                         (unsigned char *) &xa_prop,
 348                                         1);
 349                             }
 350                         }
 351
 352                         /* Skip taskbar */
 353                         if (TEST_HINT(window.hints,HINT_SKIP_TASKBAR)) {
 354                             fprintf(stderr, "Conky: hint - skip_taskbar\n"); fflush(stderr);
 355
 356                             xa = ATOM(_NET_WM_STATE);
 357                             if (xa != None) {
 358                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 359                                 XChangeProperty(display, window.window, xa,
 360                                         XA_ATOM, 32,
 361                                         PropModeAppend,
 362                                         (unsigned char *) &xa_prop,
 363                                         1);
 364                             }
 365                         }
 366
 367                         /* Skip pager */
 368                         if (TEST_HINT(window.hints,HINT_SKIP_PAGER)) {
 369                             fprintf(stderr, "Conky: hint - skip_pager\n"); fflush(stderr);
 370
 371                             xa = ATOM(_NET_WM_STATE);
 372                             if (xa != None) {
 373                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 374                                 XChangeProperty(display, window.window, xa,
 375                                         XA_ATOM, 32,
 376                                         PropModeAppend,
 377                                         (unsigned char *) &xa_prop,
 378                                         1);
 379                             }
 380                         }
 381
 382                         XMapWindow(display, window.window);
 383
 384                 }
 385         } else
 386 #endif
 387                 /* root / desktop window */
 388         {
 389                 XWindowAttributes attrs;
 390
 391                 if (!window.window)
 392                         window.window = find_desktop_window( &window.root, &window.desktop );
 393
 394                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 395                         window.width = attrs.width;
 396                         window.height = attrs.height;
 397                 }
 398
 399                 fprintf(stderr, "Conky: drawing to desktop window\n");
 400         }
 401
 402         /* Drawable is same as window. This may be changed by double buffering. */
 403         window.drawable = window.window;
 404
 405 #ifdef XDBE
 406         if (use_xdbe) {
 407                 int major, minor;
 408                 if (!XdbeQueryExtension(display, &major, &minor)) {
 409                         use_xdbe = 0;
 410                 } else {
 411                         window.back_buffer =
 412                             XdbeAllocateBackBufferName(display,
 413                                                        window.window,
 414                                                        XdbeBackground);
 415                         if (window.back_buffer != None) {
 416                                 window.drawable = window.back_buffer;
 417                                 fprintf(stderr,
 418                                         "Conky: drawing to double buffer\n");
 419                         } else
 420                                 use_xdbe = 0;
 421                 }
 422                 if (!use_xdbe)
 423                         ERR("failed to set up double buffer");
 424         }
 425         if (!use_xdbe)
 426                 fprintf(stderr, "Conky: drawing to single buffer\n");
 427 #endif
 428
 429         XFlush(display);
 430
 431         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 432 #ifdef OWN_WINDOW
 433         /*if (own_window) {
 434         set_transparent_background(window.window);
 435                 XClearWindow(display, window.window);
 436 }*/
 437 #endif
 438
 439         XSelectInput(display, window.window, ExposureMask
 440 #ifdef OWN_WINDOW
 441                      | (own_window
 442                         ? (StructureNotifyMask | PropertyChangeMask | ButtonPressMask) : 0)
 443 #endif
 444             );
 445 }
 446
 447 static Window find_subwindow(Window win, int w, int h)
 448 {
 449         unsigned int i, j;
 450         Window troot, parent, *children;
 451         unsigned int n;
 452
 453         /* search subwindows with same size as display or work area */
 454
 455         for (i = 0; i < 10; i++) {
 456                 XQueryTree(display, win, &troot, &parent, &children, &n);
 457
 458                 for (j = 0; j < n; j++) {
 459                         XWindowAttributes attrs;
 460
 461                         if (XGetWindowAttributes
 462                             (display, children[j], &attrs)) {
 463                                 /* Window must be mapped and same size as display or work space */
 464                                 if (attrs.map_state != 0 &&
 465                                     ((attrs.width == display_width
 466                                       && attrs.height == display_height)
 467                                      || (attrs.width == w
 468                                          && attrs.height == h))) {
 469                                         win = children[j];
 470                                         break;
 471                                 }
 472                         }
 473                 }
 474
 475                 XFree(children);
 476                 if (j == n)
 477                         break;
 478         }
 479
 480         return win;
 481 }
 482
 483 long get_x11_color(const char *name)
 484 {
 485         XColor color;
 486         color.pixel = 0;
 487         if (!XParseColor
 488             (display, DefaultColormap(display, screen), name, &color)) {
 489                 /* lets check if it's a hex colour with the # missing in front
 490                  * if yes, then do something about it
 491                  */
 492                 char newname[64];
 493                 newname[0] = '#';
 494                 strncpy(&newname[1], name, 62);
 495                 /* now lets try again */
 496                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 497                         ERR("can't parse X color '%s'", name);
 498                         return 0xFF00FF;
 499                 }
 500         }
 501         if (!XAllocColor
 502             (display, DefaultColormap(display, screen), &color))
 503                 ERR("can't allocate X color '%s'", name);
 504
 505         return (long) color.pixel;
 506 }
 507
 508 void create_gc()
 509 {
 510         XGCValues values;
 511         values.graphics_exposures = 0;
 512         values.function = GXcopy;
 513         window.gc = XCreateGC(display, window.drawable,
 514                               GCFunction | GCGraphicsExposures, &values);
 515 }
 516
 517 #endif /* X11 */