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/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 HAVE_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                 if ( !find_desktop_window( &window.root, &window.desktop ) )
 205                         return;
 206
 207                 if (window.type == TYPE_OVERRIDE) {
 208
 209                         /*
 210                            An override_redirect True window.  No WM hints or button processing needed.
 211                         */
 212                         XSetWindowAttributes attrs = {
 213                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 214                                 StructureNotifyMask|ExposureMask,
 215                                 0L,
 216                                 True,
 217                                 0,0 };
 218
 219                         /* Parent is desktop window (which might be a child of root) */
 220                         window.window = XCreateWindow(display,
 221                                                    window.desktop,
 222                                                    window.x, window.y, w, h, 0,
 223                                                    CopyFromParent,
 224                                                    InputOutput,
 225                                                    CopyFromParent,
 226                                                    CWBackPixel|CWOverrideRedirect,
 227                                                    &attrs);
 228
 229                         XLowerWindow(display, window.window);
 230
 231                         fprintf(stderr, "Conky: window type - override\n"); fflush(stderr);
 232
 233                 }
 234
 235                 else { /* window.type != TYPE_OVERRIDE */
 236
 237                         /*
 238                            A window managed by the window manager.  Process hints and buttons.
 239                         */
 240                         XSetWindowAttributes attrs = {
 241                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 242                                 StructureNotifyMask|ExposureMask|ButtonPressMask|ButtonReleaseMask,
 243                                 0L,
 244                                 False,
 245                                 0,0 };
 246
 247                         XClassHint classHint;
 248                         XWMHints wmHint;
 249                         Atom xa;
 250                         char window_title[256];
 251
 252                         /* Parent is root window so WM can take control */
 253                         window.window = XCreateWindow(display,
 254                                                    window.root,
 255                                                    window.x, window.y, w, h, 0,
 256                                                    CopyFromParent,
 257                                                    InputOutput,
 258                                                    CopyFromParent,
 259                                                    CWBackPixel|CWOverrideRedirect,
 260                                                    &attrs);
 261
 262                         classHint.res_name = window.wm_class_name;
 263                         classHint.res_class = classHint.res_name;
 264
 265                         wmHint.flags = InputHint | StateHint;
 266                         wmHint.input = False;
 267                         wmHint.initial_state = NormalState;
 268
 269                         sprintf(window_title,WINDOW_NAME_FMT,nodename);
 270
 271                         XmbSetWMProperties (display, window.window, window_title, NULL,
 272                                             argv, argc,
 273                                             NULL, &wmHint, &classHint);
 274
 275                         /* Sets an empty WM_PROTOCOLS property */
 276                         XSetWMProtocols(display,window.window,NULL,0);
 277
 278
 279                         /* Set window type */
 280                         if ( (xa = ATOM(_NET_WM_WINDOW_TYPE)) != None )
 281                         {
 282                                 Atom prop;
 283                                 switch(window.type) {
 284                                 case TYPE_DESKTOP:
 285                                         {
 286                                         prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 287                                         fprintf(stderr, "Conky: window type - desktop\n"); fflush(stderr);
 288                                         }
 289                                         break;
 290                                 case TYPE_NORMAL:
 291                                 default:
 292                                         {
 293                                         prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 294                                         fprintf(stderr, "Conky: window type - normal\n"); fflush(stderr);
 295                                         }
 296                                         break;
 297                                 }
 298                                 XChangeProperty(display, window.window, xa,
 299                                                 XA_ATOM, 32,
 300                                                 PropModeReplace,
 301                                                 (unsigned char *) &prop, 1);
 302                         }
 303
 304                         /* Set desired hints */
 305
 306                         /* Window decorations */
 307                         if (TEST_HINT(window.hints,HINT_UNDECORATED)) {
 308                             fprintf(stderr, "Conky: hint - undecorated\n"); fflush(stderr);
 309
 310                             xa = ATOM(_MOTIF_WM_HINTS);
 311                             if (xa != None) {
 312                                 long prop[5] = { 2, 0, 0, 0, 0 };
 313                                 XChangeProperty(display, window.window, xa,
 314                                                 xa, 32, PropModeReplace,
 315                                                 (unsigned char *) prop, 5);
 316                             }
 317                         }
 318
 319                         /* Below other windows */
 320                         if (TEST_HINT(window.hints,HINT_BELOW)) {
 321                             fprintf(stderr, "Conky: hint - below\n"); fflush(stderr);
 322
 323                             xa = ATOM(_WIN_LAYER);
 324                             if (xa != None) {
 325                                 long prop = 0;
 326                                 XChangeProperty(display, window.window, xa,
 327                                                 XA_CARDINAL, 32,
 328                                                 PropModeAppend,
 329                                                 (unsigned char *) &prop, 1);
 330                             }
 331
 332                             xa = ATOM(_NET_WM_STATE);
 333                             if (xa != None) {
 334                                 Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 335                                 XChangeProperty(display, window.window, xa,
 336                                         XA_ATOM, 32,
 337                                         PropModeAppend,
 338                                         (unsigned char *) &xa_prop,
 339                                         1);
 340                             }
 341                         }
 342
 343                         /* Above other windows */
 344                         if (TEST_HINT(window.hints,HINT_ABOVE)) {
 345                             fprintf(stderr, "Conky: hint - above\n"); fflush(stderr);
 346
 347                             xa = ATOM(_WIN_LAYER);
 348                             if (xa != None) {
 349                                 long prop = 6;
 350                                 XChangeProperty(display, window.window, xa,
 351                                                 XA_CARDINAL, 32,
 352                                                 PropModeAppend,
 353                                                 (unsigned char *) &prop, 1);
 354                             }
 355
 356                             xa = ATOM(_NET_WM_STATE);
 357                             if (xa != None) {
 358                                 Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 359                                 XChangeProperty(display, window.window, xa,
 360                                         XA_ATOM, 32,
 361                                         PropModeAppend,
 362                                         (unsigned char *) &xa_prop,
 363                                         1);
 364                             }
 365                         }
 366
 367                         /* Sticky */
 368                         if (TEST_HINT(window.hints,HINT_STICKY)) {
 369                             fprintf(stderr, "Conky: hint - sticky\n"); fflush(stderr);
 370
 371                             xa = ATOM(_NET_WM_DESKTOP);
 372                             if (xa != None) {
 373                                 CARD32 xa_prop = 0xFFFFFFFF;
 374                                 XChangeProperty(display, window.window, xa,
 375                                         XA_CARDINAL, 32,
 376                                         PropModeAppend,
 377                                         (unsigned char *) &xa_prop,
 378                                         1);
 379                             }
 380
 381                             xa = ATOM(_NET_WM_STATE);
 382                             if (xa != None) {
 383                                 Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 384                                 XChangeProperty(display, window.window, xa,
 385                                         XA_ATOM, 32,
 386                                         PropModeAppend,
 387                                         (unsigned char *) &xa_prop,
 388                                         1);
 389                             }
 390                         }
 391
 392                         /* Skip taskbar */
 393                         if (TEST_HINT(window.hints,HINT_SKIP_TASKBAR)) {
 394                             fprintf(stderr, "Conky: hint - skip_taskbar\n"); fflush(stderr);
 395
 396                             xa = ATOM(_NET_WM_STATE);
 397                             if (xa != None) {
 398                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 399                                 XChangeProperty(display, window.window, xa,
 400                                         XA_ATOM, 32,
 401                                         PropModeAppend,
 402                                         (unsigned char *) &xa_prop,
 403                                         1);
 404                             }
 405                         }
 406
 407                         /* Skip pager */
 408                         if (TEST_HINT(window.hints,HINT_SKIP_PAGER)) {
 409                             fprintf(stderr, "Conky: hint - skip_pager\n"); fflush(stderr);
 410
 411                             xa = ATOM(_NET_WM_STATE);
 412                             if (xa != None) {
 413                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 414                                 XChangeProperty(display, window.window, xa,
 415                                         XA_ATOM, 32,
 416                                         PropModeAppend,
 417                                         (unsigned char *) &xa_prop,
 418                                         1);
 419                             }
 420                         }
 421
 422                 } /* else { window.type != TYPE_OVERRIDE */
 423
 424                 fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 425                 fflush(stderr);
 426
 427                 XMapWindow(display, window.window);
 428
 429         } else /* if (own_window) { */
 430 #endif
 431                 /* root / desktop window */
 432         {
 433                 XWindowAttributes attrs;
 434
 435                 if (!window.window)
 436                         window.window = find_desktop_window( &window.root, &window.desktop );
 437
 438                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 439                         window.width = attrs.width;
 440                         window.height = attrs.height;
 441                 }
 442
 443                 fprintf(stderr, "Conky: drawing to desktop window\n");
 444         }
 445
 446         /* Drawable is same as window. This may be changed by double buffering. */
 447         window.drawable = window.window;
 448
 449 #ifdef HAVE_XDBE
 450         if (use_xdbe) {
 451                 int major, minor;
 452                 if (!XdbeQueryExtension(display, &major, &minor)) {
 453                         use_xdbe = 0;
 454                 } else {
 455                         window.back_buffer =
 456                             XdbeAllocateBackBufferName(display,
 457                                                        window.window,
 458                                                        XdbeBackground);
 459                         if (window.back_buffer != None) {
 460                                 window.drawable = window.back_buffer;
 461                                 fprintf(stderr,
 462                                         "Conky: drawing to double buffer\n");
 463                         } else
 464                                 use_xdbe = 0;
 465                 }
 466                 if (!use_xdbe)
 467                         ERR("failed to set up double buffer");
 468         }
 469         if (!use_xdbe)
 470                 fprintf(stderr, "Conky: drawing to single buffer\n");
 471 #endif
 472
 473         XFlush(display);
 474
 475         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 476 #ifdef OWN_WINDOW
 477         /*if (own_window) {
 478         set_transparent_background(window.window);
 479                 XClearWindow(display, window.window);
 480 }*/
 481 #endif
 482
 483         XSelectInput(display, window.window, ExposureMask
 484 #ifdef OWN_WINDOW
 485                      | (own_window
 486                         ? (StructureNotifyMask | PropertyChangeMask |
 487                            ButtonPressMask | ButtonReleaseMask) : 0)
 488 #endif
 489             );
 490 }
 491
 492 static Window find_subwindow(Window win, int w, int h)
 493 {
 494         unsigned int i, j;
 495         Window troot, parent, *children;
 496         unsigned int n;
 497
 498         /* search subwindows with same size as display or work area */
 499
 500         for (i = 0; i < 10; i++) {
 501                 XQueryTree(display, win, &troot, &parent, &children, &n);
 502
 503                 for (j = 0; j < n; j++) {
 504                         XWindowAttributes attrs;
 505
 506                         if (XGetWindowAttributes
 507                             (display, children[j], &attrs)) {
 508                                 /* Window must be mapped and same size as display or work space */
 509                                 if (attrs.map_state != 0 &&
 510                                     ((attrs.width == display_width
 511                                       && attrs.height == display_height)
 512                                      || (attrs.width == w
 513                                          && attrs.height == h))) {
 514                                         win = children[j];
 515                                         break;
 516                                 }
 517                         }
 518                 }
 519
 520                 XFree(children);
 521                 if (j == n)
 522                         break;
 523         }
 524
 525         return win;
 526 }
 527
 528 long get_x11_color(const char *name)
 529 {
 530         XColor color;
 531         color.pixel = 0;
 532         if (!XParseColor
 533             (display, DefaultColormap(display, screen), name, &color)) {
 534                 /* lets check if it's a hex colour with the # missing in front
 535                  * if yes, then do something about it
 536                  */
 537                 char newname[64];
 538                 newname[0] = '#';
 539                 strncpy(&newname[1], name, 62);
 540                 /* now lets try again */
 541                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 542                         ERR("can't parse X color '%s'", name);
 543                         return 0xFF00FF;
 544                 }
 545         }
 546         if (!XAllocColor
 547             (display, DefaultColormap(display, screen), &color))
 548                 ERR("can't allocate X color '%s'", name);
 549
 550         return (long) color.pixel;
 551 }
 552
 553 void create_gc()
 554 {
 555         XGCValues values;
 556         values.graphics_exposures = 0;
 557         values.function = GXcopy;
 558         window.gc = XCreateGC(display, window.drawable,
 559                               GCFunction | GCGraphicsExposures, &values);
 560 }
 561
 562 #endif /* X11 */