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/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(Window *p_root, Window *p_desktop);
  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 /* Find root window and desktop window.  Return desktop window on success,
  99  * and set root and desktop byref return values.  Return 0 on failure. */
 100 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 101 {
 102         Atom type;
 103         int format, i;
 104         unsigned long nitems, bytes;
 105         unsigned int n;
 106         Window root = RootWindow(display, screen);
 107         Window win = root;
 108         Window troot, parent, *children;
 109         unsigned char *buf = NULL;
 110
 111         if (!p_root || !p_desktop)
 112             return(0);
 113
 114         /* some window managers set __SWM_VROOT to some child of root window */
 115
 116         XQueryTree(display, root, &troot, &parent, &children, &n);
 117         for (i = 0; i < (int) n; i++) {
 118                 if (XGetWindowProperty
 119                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 120                      XA_WINDOW, &type, &format, &nitems, &bytes,
 121                      &buf) == Success && type == XA_WINDOW) {
 122                         win = *(Window *) buf;
 123                         XFree(buf);
 124                         XFree(children);
 125                         fprintf(stderr,
 126                                 "Conky: desktop window (%lx) found from __SWM_VROOT property\n", win);
 127                         fflush(stderr);
 128                         *p_root=win;
 129                         *p_desktop=win;
 130                         return win;
 131                 }
 132
 133                 if (buf) {
 134                         XFree(buf);
 135                         buf = 0;
 136                 }
 137         }
 138         XFree(children);
 139
 140         /* get subwindows from root */
 141         win = find_subwindow(root, -1, -1);
 142
 143         update_workarea();
 144
 145         win = find_subwindow(win, workarea[2], workarea[3]);
 146
 147         if (buf) {
 148                 XFree(buf);
 149                 buf = 0;
 150         }
 151
 152         if (win != root)
 153                 fprintf(stderr,
 154                         "Conky: desktop window (%lx) is subwindow of root window (%lx)\n",win,root);
 155         else
 156                 fprintf(stderr, "Conky: desktop window (%lx) is root window\n",win);
 157
 158         fflush(stderr);
 159
 160         *p_root=root;
 161         *p_desktop=win;
 162
 163         return win;
 164 }
 165
 166 /* sets background to ParentRelative for the Window and all parents */
 167 inline void set_transparent_background(Window win)
 168 {
 169         static int colour_set = -1;
 170         if (set_transparent) {
 171                 Window parent = win;
 172                 unsigned int i;
 173                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 174                         Window r, *children;
 175                         unsigned int n;
 176
 177                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 178
 179                         XQueryTree(display, parent, &r, &parent, &children, &n);
 180                         XFree(children);
 181                         }
 182         } else if (colour_set != background_colour) {
 183                 XSetWindowBackground(display, win, background_colour);
 184                 colour_set = background_colour;
 185 }
 186         //XClearWindow(display, win); not sure why this was here
 187 }
 188
 189 void init_window(int own_window, int w, int h, int set_trans, int back_colour, char * nodename,
 190                  char **argv, int argc)
 191 {
 192         /* There seems to be some problems with setting transparent background (on
 193          * fluxbox this time). It doesn't happen always and I don't know why it
 194          * happens but I bet the bug is somewhere here. */
 195         set_transparent = set_trans;
 196         background_colour = back_colour;
 197
 198         nodename = (char *)nodename;
 199
 200 #ifdef OWN_WINDOW
 201         if (own_window) {
 202                 {
 203                         /* Allow WM control of conky again.  Shielding conky from the WM
 204                          * via override redirect creates more problems than it's worth and
 205                          * makes it impossible to use tools like devilspie to manage the
 206                          * conky windows beyond the parametsrs we offer.  Also, button
 207                          * press events are now explicitly forwarded to the root window. */
 208                         XSetWindowAttributes attrs = {
 209                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 210                                 StructureNotifyMask|ExposureMask|ButtonPressMask,
 211                                 0L,False,0,0 };
 212
 213                         XClassHint classHint;
 214                         XWMHints wmHint;
 215                         Atom xa;
 216                         char window_title[256];
 217
 218                         /* We want to parent the window to the root so it's under WM control,
 219                          * but we want to forward button clicks to the desktop window for menus.
 220                          * On some desktop systems, the desktop window != root window. */
 221                         if ( !find_desktop_window( &window.root, &window.desktop ) )
 222                             return;
 223
 224                         window.window = XCreateWindow(display, window.root,
 225                                                       window.x, window.y, w, h, 0,
 226                                                       CopyFromParent,
 227                                                       InputOutput,
 228                                                       CopyFromParent,
 229                                                       CWBackPixel|CWOverrideRedirect,
 230                                                       &attrs);
 231
 232                         fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 233                         fflush(stderr);
 234
 235                         classHint.res_name = window.wm_class_name;
 236                         classHint.res_class = classHint.res_name;
 237
 238                         wmHint.flags = InputHint | StateHint;
 239                         wmHint.input = False;
 240                         wmHint.initial_state = NormalState;
 241
 242                         sprintf(window_title,WINDOW_NAME_FMT,nodename);
 243
 244                         XmbSetWMProperties (display, window.window, window_title, NULL,
 245                                             argv, argc,
 246                                             NULL, &wmHint, &classHint);
 247
 248                         /* Sets an empty WM_PROTOCOLS property */
 249                         XSetWMProtocols(display,window.window,NULL,0);
 250
 251
 252                         /* Set NORMAL window type for _NET_WM_WINDOW_TYPE. */
 253                         xa = ATOM(_NET_WM_WINDOW_TYPE);
 254                         if (xa != None) {
 255                                 Atom prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 256                                 XChangeProperty(display, window.window, xa,
 257                                                 XA_ATOM, 32,
 258                                                 PropModeReplace,
 259                                                 (unsigned char *) &prop,
 260                                                 1);
 261                         }
 262
 263                         /* Set desired hints */
 264
 265                         /* Window decorations */
 266                         if (TEST_HINT(window.hints,HINT_UNDECORATED)) {
 267                             fprintf(stderr, "Conky: hint - undecorated\n"); fflush(stderr);
 268
 269                             xa = ATOM(_MOTIF_WM_HINTS);
 270                             if (xa != None) {
 271                                 long prop[5] = { 2, 0, 0, 0, 0 };
 272                                 XChangeProperty(display, window.window, xa,
 273                                                 xa, 32, PropModeReplace,
 274                                                 (unsigned char *) prop, 5);
 275                             }
 276                         }
 277
 278                         /* Below other windows */
 279                         if (TEST_HINT(window.hints,HINT_BELOW)) {
 280                             fprintf(stderr, "Conky: hint - below\n"); fflush(stderr);
 281
 282                             xa = ATOM(_WIN_LAYER);
 283                             if (xa != None) {
 284                                 long prop = 0;
 285                                 XChangeProperty(display, window.window, xa,
 286                                                 XA_CARDINAL, 32,
 287                                                 PropModeAppend,
 288                                                 (unsigned char *) &prop, 1);
 289                             }
 290
 291                             xa = ATOM(_NET_WM_STATE);
 292                             if (xa != None) {
 293                                 Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 294                                 XChangeProperty(display, window.window, xa,
 295                                         XA_ATOM, 32,
 296                                         PropModeAppend,
 297                                         (unsigned char *) &xa_prop,
 298                                         1);
 299                             }
 300                         }
 301
 302                         /* Above other windows */
 303                         if (TEST_HINT(window.hints,HINT_ABOVE)) {
 304                             fprintf(stderr, "Conky: hint - above\n"); fflush(stderr);
 305
 306                             xa = ATOM(_WIN_LAYER);
 307                             if (xa != None) {
 308                                 long prop = 6;
 309                                 XChangeProperty(display, window.window, xa,
 310                                                 XA_CARDINAL, 32,
 311                                                 PropModeAppend,
 312                                                 (unsigned char *) &prop, 1);
 313                             }
 314
 315                             xa = ATOM(_NET_WM_STATE);
 316                             if (xa != None) {
 317                                 Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 318                                 XChangeProperty(display, window.window, xa,
 319                                         XA_ATOM, 32,
 320                                         PropModeAppend,
 321                                         (unsigned char *) &xa_prop,
 322                                         1);
 323                             }
 324                         }
 325
 326                         /* Sticky */
 327                         if (TEST_HINT(window.hints,HINT_STICKY)) {
 328                             fprintf(stderr, "Conky: hint - sticky\n"); fflush(stderr);
 329
 330                             xa = ATOM(_NET_WM_DESKTOP);
 331                             if (xa != None) {
 332                                 uint32_t xa_prop = UINT32_MAX;
 333                                 XChangeProperty(display, window.window, xa,
 334                                         XA_CARDINAL, 32,
 335                                         PropModeAppend,
 336                                         (unsigned char *) &xa_prop,
 337                                         1);
 338                             }
 339
 340                             xa = ATOM(_NET_WM_STATE);
 341                             if (xa != None) {
 342                                 Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 343                                 XChangeProperty(display, window.window, xa,
 344                                         XA_ATOM, 32,
 345                                         PropModeAppend,
 346                                         (unsigned char *) &xa_prop,
 347                                         1);
 348                             }
 349                         }
 350
 351                         /* Skip taskbar */
 352                         if (TEST_HINT(window.hints,HINT_SKIP_TASKBAR)) {
 353                             fprintf(stderr, "Conky: hint - skip_taskbar\n"); fflush(stderr);
 354
 355                             xa = ATOM(_NET_WM_STATE);
 356                             if (xa != None) {
 357                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 358                                 XChangeProperty(display, window.window, xa,
 359                                         XA_ATOM, 32,
 360                                         PropModeAppend,
 361                                         (unsigned char *) &xa_prop,
 362                                         1);
 363                             }
 364                         }
 365
 366                         /* Skip pager */
 367                         if (TEST_HINT(window.hints,HINT_SKIP_PAGER)) {
 368                             fprintf(stderr, "Conky: hint - skip_pager\n"); fflush(stderr);
 369
 370                             xa = ATOM(_NET_WM_STATE);
 371                             if (xa != None) {
 372                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 373                                 XChangeProperty(display, window.window, xa,
 374                                         XA_ATOM, 32,
 375                                         PropModeAppend,
 376                                         (unsigned char *) &xa_prop,
 377                                         1);
 378                             }
 379                         }
 380
 381                         XMapWindow(display, window.window);
 382
 383                 }
 384         } else
 385 #endif
 386                 /* root / desktop window */
 387         {
 388                 XWindowAttributes attrs;
 389
 390                 if (!window.window)
 391                         window.window = find_desktop_window( &window.root, &window.desktop );
 392
 393                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 394                         window.width = attrs.width;
 395                         window.height = attrs.height;
 396                 }
 397
 398                 fprintf(stderr, "Conky: drawing to desktop window\n");
 399         }
 400
 401         /* Drawable is same as window. This may be changed by double buffering. */
 402         window.drawable = window.window;
 403
 404 #ifdef XDBE
 405         if (use_xdbe) {
 406                 int major, minor;
 407                 if (!XdbeQueryExtension(display, &major, &minor)) {
 408                         use_xdbe = 0;
 409                 } else {
 410                         window.back_buffer =
 411                             XdbeAllocateBackBufferName(display,
 412                                                        window.window,
 413                                                        XdbeBackground);
 414                         if (window.back_buffer != None) {
 415                                 window.drawable = window.back_buffer;
 416                                 fprintf(stderr,
 417                                         "Conky: drawing to double buffer\n");
 418                         } else
 419                                 use_xdbe = 0;
 420                 }
 421                 if (!use_xdbe)
 422                         ERR("failed to set up double buffer");
 423         }
 424         if (!use_xdbe)
 425                 fprintf(stderr, "Conky: drawing to single buffer\n");
 426 #endif
 427
 428         XFlush(display);
 429
 430         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 431 #ifdef OWN_WINDOW
 432         /*if (own_window) {
 433         set_transparent_background(window.window);
 434                 XClearWindow(display, window.window);
 435 }*/
 436 #endif
 437
 438         XSelectInput(display, window.window, ExposureMask
 439 #ifdef OWN_WINDOW
 440                      | (own_window
 441                         ? (StructureNotifyMask | PropertyChangeMask | ButtonPressMask) : 0)
 442 #endif
 443             );
 444 }
 445
 446 static Window find_subwindow(Window win, int w, int h)
 447 {
 448         unsigned int i, j;
 449         Window troot, parent, *children;
 450         unsigned int n;
 451
 452         /* search subwindows with same size as display or work area */
 453
 454         for (i = 0; i < 10; i++) {
 455                 XQueryTree(display, win, &troot, &parent, &children, &n);
 456
 457                 for (j = 0; j < n; j++) {
 458                         XWindowAttributes attrs;
 459
 460                         if (XGetWindowAttributes
 461                             (display, children[j], &attrs)) {
 462                                 /* Window must be mapped and same size as display or work space */
 463                                 if (attrs.map_state != 0 &&
 464                                     ((attrs.width == display_width
 465                                       && attrs.height == display_height)
 466                                      || (attrs.width == w
 467                                          && attrs.height == h))) {
 468                                         win = children[j];
 469                                         break;
 470                                 }
 471                         }
 472                 }
 473
 474                 XFree(children);
 475                 if (j == n)
 476                         break;
 477         }
 478
 479         return win;
 480 }
 481
 482 long get_x11_color(const char *name)
 483 {
 484         XColor color;
 485         color.pixel = 0;
 486         if (!XParseColor
 487             (display, DefaultColormap(display, screen), name, &color)) {
 488                 /* lets check if it's a hex colour with the # missing in front
 489                  * if yes, then do something about it
 490                  */
 491                 char newname[64];
 492                 newname[0] = '#';
 493                 strncpy(&newname[1], name, 62);
 494                 /* now lets try again */
 495                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 496                         ERR("can't parse X color '%s'", name);
 497                         return 0xFF00FF;
 498                 }
 499         }
 500         if (!XAllocColor
 501             (display, DefaultColormap(display, screen), &color))
 502                 ERR("can't allocate X color '%s'", name);
 503
 504         return (long) color.pixel;
 505 }
 506
 507 void create_gc()
 508 {
 509         XGCValues values;
 510         values.graphics_exposures = 0;
 511         values.function = GXcopy;
 512         window.gc = XCreateGC(display, window.drawable,
 513                               GCFunction | GCGraphicsExposures, &values);
 514 }
 515
 516 #endif /* X11 */