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