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 #ifdef HAVE_XDBE
  22 int use_xdbe;
  23 #endif
  24
  25 #ifdef XFT
  26 int use_xft = 0;
  27 #endif
  28
  29 #define WINDOW_NAME_FMT "%s - conky"
  30
  31 /* some basic X11 stuff */
  32 Display *display;
  33 int display_width;
  34 int display_height;
  35 int screen;
  36 static int set_transparent;
  37 static int background_colour;
  38
  39 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  40 int workarea[4];
  41
  42 /* Window stuff */
  43 struct conky_window window;
  44
  45 /* local prototypes */
  46 static void update_workarea();
  47 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  48 static Window find_subwindow(Window win, int w, int h);
  49
  50 /* X11 initializer */
  51 void init_X11()
  52 {
  53         if ((display = XOpenDisplay(0)) == NULL)
  54                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  55
  56         screen = DefaultScreen(display);
  57         display_width = DisplayWidth(display, screen);
  58         display_height = DisplayHeight(display, screen);
  59
  60         update_workarea();
  61 }
  62
  63 static void update_workarea()
  64 {
  65         Window root = RootWindow(display, screen);
  66         unsigned long nitems, bytes;
  67         unsigned char *buf = NULL;
  68         Atom type;
  69         int format;
  70
  71         /* default work area is display */
  72         workarea[0] = 0;
  73         workarea[1] = 0;
  74         workarea[2] = display_width;
  75         workarea[3] = display_height;
  76
  77         /* get current desktop */
  78         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP),
  79                                0, 1, False, XA_CARDINAL, &type, &format,
  80                                &nitems, &bytes, &buf) == Success
  81             && type == XA_CARDINAL && nitems > 0) {
  82
  83                 //Currently unused
  84                 /*  long desktop = * (long *) buf; */
  85
  86                 XFree(buf);
  87                 buf = 0;
  88
  89         }
  90
  91         if (buf) {
  92                 XFree(buf);
  93                 buf = 0;
  94         }
  95 }
  96
  97 /* Find root window and desktop window.  Return desktop window on success,
  98  * and set root and desktop byref return values.  Return 0 on failure. */
  99 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 100 {
 101         Atom type;
 102         int format, i;
 103         unsigned long nitems, bytes;
 104         unsigned int n;
 105         Window root = RootWindow(display, screen);
 106         Window win = root;
 107         Window troot, parent, *children;
 108         unsigned char *buf = NULL;
 109
 110         if (!p_root || !p_desktop)
 111             return(0);
 112
 113         /* some window managers set __SWM_VROOT to some child of root window */
 114
 115         XQueryTree(display, root, &troot, &parent, &children, &n);
 116         for (i = 0; i < (int) n; i++) {
 117                 if (XGetWindowProperty
 118                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 119                      XA_WINDOW, &type, &format, &nitems, &bytes,
 120                      &buf) == Success && type == XA_WINDOW) {
 121                         win = *(Window *) buf;
 122                         XFree(buf);
 123                         XFree(children);
 124                         fprintf(stderr,
 125                                 "Conky: desktop window (%lx) found from __SWM_VROOT property\n", win);
 126                         fflush(stderr);
 127                         *p_root=win;
 128                         *p_desktop=win;
 129                         return win;
 130                 }
 131
 132                 if (buf) {
 133                         XFree(buf);
 134                         buf = 0;
 135                 }
 136         }
 137         XFree(children);
 138
 139         /* get subwindows from root */
 140         win = find_subwindow(root, -1, -1);
 141
 142         update_workarea();
 143
 144         win = find_subwindow(win, workarea[2], workarea[3]);
 145
 146         if (buf) {
 147                 XFree(buf);
 148                 buf = 0;
 149         }
 150
 151         if (win != root)
 152                 fprintf(stderr,
 153                         "Conky: desktop window (%lx) is subwindow of root window (%lx)\n",win,root);
 154         else
 155                 fprintf(stderr, "Conky: desktop window (%lx) is root window\n",win);
 156
 157         fflush(stderr);
 158
 159         *p_root=root;
 160         *p_desktop=win;
 161
 162         return win;
 163 }
 164
 165 /* sets background to ParentRelative for the Window and all parents */
 166 inline void set_transparent_background(Window win)
 167 {
 168         static int colour_set = -1;
 169         if (set_transparent) {
 170                 Window parent = win;
 171                 unsigned int i;
 172                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 173                         Window r, *children;
 174                         unsigned int n;
 175
 176                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 177
 178                         XQueryTree(display, parent, &r, &parent, &children, &n);
 179                         XFree(children);
 180                         }
 181         } else if (colour_set != background_colour) {
 182                 XSetWindowBackground(display, win, background_colour);
 183                 colour_set = background_colour;
 184 }
 185         //XClearWindow(display, win); not sure why this was here
 186 }
 187
 188 void init_window(int own_window, int w, int h, int set_trans, int back_colour, char * nodename,
 189                  char **argv, int argc)
 190 {
 191         /* There seems to be some problems with setting transparent background (on
 192          * fluxbox this time). It doesn't happen always and I don't know why it
 193          * happens but I bet the bug is somewhere here. */
 194         set_transparent = set_trans;
 195         background_colour = back_colour;
 196
 197         nodename = (char *)nodename;
 198
 199 #ifdef OWN_WINDOW
 200         if (own_window) {
 201
 202                 if ( !find_desktop_window( &window.root, &window.desktop ) )
 203                         return;
 204
 205                 if (window.type == TYPE_OVERRIDE) {
 206
 207                         /*
 208                            An override_redirect True window.  No WM hints or button processing needed.
 209                         */
 210                         XSetWindowAttributes attrs = {
 211                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 212                                 StructureNotifyMask|ExposureMask,
 213                                 0L,
 214                                 True,
 215                                 0,0 };
 216
 217                         /* Parent is desktop window (which might be a child of root) */
 218                         window.window = XCreateWindow(display,
 219                                                    window.desktop,
 220                                                    window.x, window.y, w, h, 0,
 221                                                    CopyFromParent,
 222                                                    InputOutput,
 223                                                    CopyFromParent,
 224                                                    CWBackPixel|CWOverrideRedirect,
 225                                                    &attrs);
 226
 227                         XLowerWindow(display, window.window);
 228
 229                         fprintf(stderr, "Conky: window type - override\n"); fflush(stderr);
 230
 231                 }
 232
 233                 else { /* window.type != TYPE_OVERRIDE */
 234
 235                         /*
 236                            A window managed by the window manager.  Process hints and buttons.
 237                         */
 238                         XSetWindowAttributes attrs = {
 239                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 240                                 StructureNotifyMask|ExposureMask|ButtonPressMask|ButtonReleaseMask,
 241                                 0L,
 242                                 False,
 243                                 0,0 };
 244
 245                         XClassHint classHint;
 246                         XWMHints wmHint;
 247                         Atom xa;
 248                         char window_title[256];
 249
 250                         /* Parent is root window so WM can take control */
 251                         window.window = XCreateWindow(display,
 252                                                    window.root,
 253                                                    window.x, window.y, w, h, 0,
 254                                                    CopyFromParent,
 255                                                    InputOutput,
 256                                                    CopyFromParent,
 257                                                    CWBackPixel|CWOverrideRedirect,
 258                                                    &attrs);
 259
 260                         classHint.res_name = window.wm_class_name;
 261                         classHint.res_class = classHint.res_name;
 262
 263                         wmHint.flags = InputHint | StateHint;
 264                         wmHint.input = False;
 265                         wmHint.initial_state = NormalState;
 266
 267                         sprintf(window_title,WINDOW_NAME_FMT,nodename);
 268
 269                         XmbSetWMProperties (display, window.window, window_title, NULL,
 270                                             argv, argc,
 271                                             NULL, &wmHint, &classHint);
 272
 273                         /* Sets an empty WM_PROTOCOLS property */
 274                         XSetWMProtocols(display,window.window,NULL,0);
 275
 276
 277                         /* Set window type */
 278                         if ( (xa = ATOM(_NET_WM_WINDOW_TYPE)) != None )
 279                         {
 280                                 Atom prop;
 281                                 switch(window.type) {
 282                                 case TYPE_DESKTOP:
 283                                         {
 284                                         prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 285                                         fprintf(stderr, "Conky: window type - desktop\n"); fflush(stderr);
 286                                         }
 287                                         break;
 288                                 case TYPE_NORMAL:
 289                                 default:
 290                                         {
 291                                         prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 292                                         fprintf(stderr, "Conky: window type - normal\n"); fflush(stderr);
 293                                         }
 294                                         break;
 295                                 }
 296                                 XChangeProperty(display, window.window, xa,
 297                                                 XA_ATOM, 32,
 298                                                 PropModeReplace,
 299                                                 (unsigned char *) &prop, 1);
 300                         }
 301
 302                         /* Set desired hints */
 303
 304                         /* Window decorations */
 305                         if (TEST_HINT(window.hints,HINT_UNDECORATED)) {
 306                             fprintf(stderr, "Conky: hint - undecorated\n"); fflush(stderr);
 307
 308                             xa = ATOM(_MOTIF_WM_HINTS);
 309                             if (xa != None) {
 310                                 long prop[5] = { 2, 0, 0, 0, 0 };
 311                                 XChangeProperty(display, window.window, xa,
 312                                                 xa, 32, PropModeReplace,
 313                                                 (unsigned char *) prop, 5);
 314                             }
 315                         }
 316
 317                         /* Below other windows */
 318                         if (TEST_HINT(window.hints,HINT_BELOW)) {
 319                             fprintf(stderr, "Conky: hint - below\n"); fflush(stderr);
 320
 321                             xa = ATOM(_WIN_LAYER);
 322                             if (xa != None) {
 323                                 long prop = 0;
 324                                 XChangeProperty(display, window.window, xa,
 325                                                 XA_CARDINAL, 32,
 326                                                 PropModeAppend,
 327                                                 (unsigned char *) &prop, 1);
 328                             }
 329
 330                             xa = ATOM(_NET_WM_STATE);
 331                             if (xa != None) {
 332                                 Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 333                                 XChangeProperty(display, window.window, xa,
 334                                         XA_ATOM, 32,
 335                                         PropModeAppend,
 336                                         (unsigned char *) &xa_prop,
 337                                         1);
 338                             }
 339                         }
 340
 341                         /* Above other windows */
 342                         if (TEST_HINT(window.hints,HINT_ABOVE)) {
 343                             fprintf(stderr, "Conky: hint - above\n"); fflush(stderr);
 344
 345                             xa = ATOM(_WIN_LAYER);
 346                             if (xa != None) {
 347                                 long prop = 6;
 348                                 XChangeProperty(display, window.window, xa,
 349                                                 XA_CARDINAL, 32,
 350                                                 PropModeAppend,
 351                                                 (unsigned char *) &prop, 1);
 352                             }
 353
 354                             xa = ATOM(_NET_WM_STATE);
 355                             if (xa != None) {
 356                                 Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 357                                 XChangeProperty(display, window.window, xa,
 358                                         XA_ATOM, 32,
 359                                         PropModeAppend,
 360                                         (unsigned char *) &xa_prop,
 361                                         1);
 362                             }
 363                         }
 364
 365                         /* Sticky */
 366                         if (TEST_HINT(window.hints,HINT_STICKY)) {
 367                             fprintf(stderr, "Conky: hint - sticky\n"); fflush(stderr);
 368
 369                             xa = ATOM(_NET_WM_DESKTOP);
 370                             if (xa != None) {
 371                                 CARD32 xa_prop = 0xFFFFFFFF;
 372                                 XChangeProperty(display, window.window, xa,
 373                                         XA_CARDINAL, 32,
 374                                         PropModeAppend,
 375                                         (unsigned char *) &xa_prop,
 376                                         1);
 377                             }
 378
 379                             xa = ATOM(_NET_WM_STATE);
 380                             if (xa != None) {
 381                                 Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 382                                 XChangeProperty(display, window.window, xa,
 383                                         XA_ATOM, 32,
 384                                         PropModeAppend,
 385                                         (unsigned char *) &xa_prop,
 386                                         1);
 387                             }
 388                         }
 389
 390                         /* Skip taskbar */
 391                         if (TEST_HINT(window.hints,HINT_SKIP_TASKBAR)) {
 392                             fprintf(stderr, "Conky: hint - skip_taskbar\n"); fflush(stderr);
 393
 394                             xa = ATOM(_NET_WM_STATE);
 395                             if (xa != None) {
 396                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 397                                 XChangeProperty(display, window.window, xa,
 398                                         XA_ATOM, 32,
 399                                         PropModeAppend,
 400                                         (unsigned char *) &xa_prop,
 401                                         1);
 402                             }
 403                         }
 404
 405                         /* Skip pager */
 406                         if (TEST_HINT(window.hints,HINT_SKIP_PAGER)) {
 407                             fprintf(stderr, "Conky: hint - skip_pager\n"); fflush(stderr);
 408
 409                             xa = ATOM(_NET_WM_STATE);
 410                             if (xa != None) {
 411                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 412                                 XChangeProperty(display, window.window, xa,
 413                                         XA_ATOM, 32,
 414                                         PropModeAppend,
 415                                         (unsigned char *) &xa_prop,
 416                                         1);
 417                             }
 418                         }
 419
 420                 } /* else { window.type != TYPE_OVERRIDE */
 421
 422                 fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 423                 fflush(stderr);
 424
 425                 XMapWindow(display, window.window);
 426
 427         } else /* if (own_window) { */
 428 #endif
 429                 /* root / desktop window */
 430         {
 431                 XWindowAttributes attrs;
 432
 433                 if (!window.window)
 434                         window.window = find_desktop_window( &window.root, &window.desktop );
 435
 436                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 437                         window.width = attrs.width;
 438                         window.height = attrs.height;
 439                 }
 440
 441                 fprintf(stderr, "Conky: drawing to desktop window\n");
 442         }
 443
 444         /* Drawable is same as window. This may be changed by double buffering. */
 445         window.drawable = window.window;
 446
 447 #ifdef HAVE_XDBE
 448         if (use_xdbe) {
 449                 int major, minor;
 450                 if (!XdbeQueryExtension(display, &major, &minor)) {
 451                         use_xdbe = 0;
 452                 } else {
 453                         window.back_buffer =
 454                             XdbeAllocateBackBufferName(display,
 455                                                        window.window,
 456                                                        XdbeBackground);
 457                         if (window.back_buffer != None) {
 458                                 window.drawable = window.back_buffer;
 459                                 fprintf(stderr,
 460                                         "Conky: drawing to double buffer\n");
 461                         } else
 462                                 use_xdbe = 0;
 463                 }
 464                 if (!use_xdbe)
 465                         ERR("failed to set up double buffer");
 466         }
 467         if (!use_xdbe)
 468                 fprintf(stderr, "Conky: drawing to single buffer\n");
 469 #endif
 470
 471         XFlush(display);
 472
 473         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 474 #ifdef OWN_WINDOW
 475         /*if (own_window) {
 476         set_transparent_background(window.window);
 477                 XClearWindow(display, window.window);
 478 }*/
 479 #endif
 480
 481         XSelectInput(display, window.window, ExposureMask
 482 #ifdef OWN_WINDOW
 483                      | (own_window
 484                         ? (StructureNotifyMask | PropertyChangeMask |
 485                            ButtonPressMask | ButtonReleaseMask) : 0)
 486 #endif
 487             );
 488 }
 489
 490 static Window find_subwindow(Window win, int w, int h)
 491 {
 492         unsigned int i, j;
 493         Window troot, parent, *children;
 494         unsigned int n;
 495
 496         /* search subwindows with same size as display or work area */
 497
 498         for (i = 0; i < 10; i++) {
 499                 XQueryTree(display, win, &troot, &parent, &children, &n);
 500
 501                 for (j = 0; j < n; j++) {
 502                         XWindowAttributes attrs;
 503
 504                         if (XGetWindowAttributes
 505                             (display, children[j], &attrs)) {
 506                                 /* Window must be mapped and same size as display or work space */
 507                                 if (attrs.map_state != 0 &&
 508                                     ((attrs.width == display_width
 509                                       && attrs.height == display_height)
 510                                      || (attrs.width == w
 511                                          && attrs.height == h))) {
 512                                         win = children[j];
 513                                         break;
 514                                 }
 515                         }
 516                 }
 517
 518                 XFree(children);
 519                 if (j == n)
 520                         break;
 521         }
 522
 523         return win;
 524 }
 525
 526 long get_x11_color(const char *name)
 527 {
 528         XColor color;
 529         color.pixel = 0;
 530         if (!XParseColor
 531             (display, DefaultColormap(display, screen), name, &color)) {
 532                 /* lets check if it's a hex colour with the # missing in front
 533                  * if yes, then do something about it
 534                  */
 535                 char newname[64];
 536                 newname[0] = '#';
 537                 strncpy(&newname[1], name, 62);
 538                 /* now lets try again */
 539                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 540                         ERR("can't parse X color '%s'", name);
 541                         return 0xFF00FF;
 542                 }
 543         }
 544         if (!XAllocColor
 545             (display, DefaultColormap(display, screen), &color))
 546                 ERR("can't allocate X color '%s'", name);
 547
 548         return (long) color.pixel;
 549 }
 550
 551 void create_gc()
 552 {
 553         XGCValues values;
 554         values.graphics_exposures = 0;
 555         values.function = GXcopy;
 556         window.gc = XCreateGC(display, window.drawable,
 557                               GCFunction | GCGraphicsExposures, &values);
 558 }
 559
 560 #endif /* X11 */