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

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  10  * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
  11  *      (see AUTHORS)
  12  * All rights reserved.
  13  *
  14  * This program is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation, either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  *
  26  */
  27
  28 #include "conky.h"
  29
  30 #ifdef X11
  31 #include <X11/Xlib.h>
  32 #include <X11/Xatom.h>
  33 #include <X11/Xmd.h>
  34 #include <X11/Xutil.h>
  35 #ifdef XFT
  36 #include <X11/Xft/Xft.h>
  37 #endif
  38
  39 #ifdef HAVE_XDBE
  40 int use_xdbe;
  41 #endif
  42
  43 #ifdef XFT
  44 int use_xft = 0;
  45 #endif
  46
  47 /* some basic X11 stuff */
  48 Display *display;
  49 int display_width;
  50 int display_height;
  51 int screen;
  52 static int set_transparent;
  53 static int background_colour;
  54
  55 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  56 int workarea[4];
  57
  58 /* Window stuff */
  59 struct conky_window window;
  60
  61 /* local prototypes */
  62 static void update_workarea(void);
  63 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  64 static Window find_subwindow(Window win, int w, int h);
  65
  66 /* X11 initializer */
  67 void init_X11(void)
  68 {
  69         if ((display = XOpenDisplay(0)) == NULL) {
  70                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  71         }
  72
  73         screen = DefaultScreen(display);
  74         display_width = DisplayWidth(display, screen);
  75         display_height = DisplayHeight(display, screen);
  76
  77         update_workarea();
  78 }
  79
  80 static void update_workarea(void)
  81 {
  82         Window root = RootWindow(display, screen);
  83         unsigned long nitems, bytes;
  84         unsigned char *buf = NULL;
  85         Atom type;
  86         int format;
  87
  88         /* default work area is display */
  89         workarea[0] = 0;
  90         workarea[1] = 0;
  91         workarea[2] = display_width;
  92         workarea[3] = display_height;
  93
  94         /* get current desktop */
  95         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP), 0, 1,
  96                         False, XA_CARDINAL, &type, &format, &nitems, &bytes, &buf)
  97                         == Success && type == XA_CARDINAL && nitems > 0) {
  98
  99                 // Currently unused
 100                 /* long desktop = *(long *) buf; */
 101
 102                 XFree(buf);
 103                 buf = 0;
 104         }
 105
 106         if (buf) {
 107                 XFree(buf);
 108                 buf = 0;
 109         }
 110 }
 111
 112 /* Find root window and desktop window.
 113  * Return desktop window on success,
 114  * and set root and desktop byref return values.
 115  * Return 0 on failure. */
 116 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 117 {
 118         Atom type;
 119         int format, i;
 120         unsigned long nitems, bytes;
 121         unsigned int n;
 122         Window root = RootWindow(display, screen);
 123         Window win = root;
 124         Window troot, parent, *children;
 125         unsigned char *buf = NULL;
 126
 127         if (!p_root || !p_desktop) {
 128                 return 0;
 129         }
 130
 131         /* some window managers set __SWM_VROOT to some child of root window */
 132
 133         XQueryTree(display, root, &troot, &parent, &children, &n);
 134         for (i = 0; i < (int) n; i++) {
 135                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 136                                 False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 137                                 == Success && type == XA_WINDOW) {
 138                         win = *(Window *) buf;
 139                         XFree(buf);
 140                         XFree(children);
 141                         fprintf(stderr,
 142                                 PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 143                                 win);
 144                         fflush(stderr);
 145                         *p_root = win;
 146                         *p_desktop = win;
 147                         return win;
 148                 }
 149
 150                 if (buf) {
 151                         XFree(buf);
 152                         buf = 0;
 153                 }
 154         }
 155         XFree(children);
 156
 157         /* get subwindows from root */
 158         win = find_subwindow(root, -1, -1);
 159
 160         update_workarea();
 161
 162         win = find_subwindow(win, workarea[2], workarea[3]);
 163
 164         if (buf) {
 165                 XFree(buf);
 166                 buf = 0;
 167         }
 168
 169         if (win != root) {
 170                 fprintf(stderr,
 171                         PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 172                         win, root);
 173         } else {
 174                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 175         }
 176
 177         fflush(stderr);
 178
 179         *p_root = root;
 180         *p_desktop = win;
 181
 182         return win;
 183 }
 184
 185 /* sets background to ParentRelative for the Window and all parents */
 186 void set_transparent_background(Window win)
 187 {
 188         static int colour_set = -1;
 189
 190         if (set_transparent) {
 191                 Window parent = win;
 192                 unsigned int i;
 193
 194                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 195                         Window r, *children;
 196                         unsigned int n;
 197
 198                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 199
 200                         XQueryTree(display, parent, &r, &parent, &children, &n);
 201                         XFree(children);
 202                 }
 203         } else if (colour_set != background_colour) {
 204                 XSetWindowBackground(display, win, background_colour);
 205                 colour_set = background_colour;
 206         }
 207         // XClearWindow(display, win); not sure why this was here
 208 }
 209
 210 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 211                 char **argv, int argc)
 212 {
 213         /* There seems to be some problems with setting transparent background
 214          * (on fluxbox this time). It doesn't happen always and I don't know why it
 215          * happens but I bet the bug is somewhere here. */
 216         set_transparent = set_trans;
 217         background_colour = back_colour;
 218
 219 #ifdef OWN_WINDOW
 220         if (own_window) {
 221
 222                 if (!find_desktop_window(&window.root, &window.desktop)) {
 223                         return;
 224                 }
 225
 226                 if (window.type == TYPE_OVERRIDE) {
 227
 228                         /* An override_redirect True window.
 229                          * No WM hints or button processing needed. */
 230                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 231                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 232                                 True, 0, 0 };
 233
 234                         /* Parent is desktop window (which might be a child of root) */
 235                         window.window = XCreateWindow(display, window.desktop, window.x,
 236                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 237                                 CWBackPixel | CWOverrideRedirect, &attrs);
 238
 239                         XLowerWindow(display, window.window);
 240
 241                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 242                         fflush(stderr);
 243                 } else { /* window.type != TYPE_OVERRIDE */
 244
 245                         /* A window managed by the window manager.
 246                          * Process hints and buttons. */
 247                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 248                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 249                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 250
 251                         XClassHint classHint;
 252                         XWMHints wmHint;
 253                         Atom xa;
 254
 255                         if (window.type == TYPE_DOCK) {
 256                                 window.x = window.y = 0;
 257                         }
 258                         /* Parent is root window so WM can take control */
 259                         window.window = XCreateWindow(display, window.root, window.x,
 260                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 261                                 CWBackPixel | CWOverrideRedirect, &attrs);
 262
 263                         classHint.res_name = window.class_name;
 264                         classHint.res_class = classHint.res_name;
 265
 266                         wmHint.flags = InputHint | StateHint;
 267                         /* allow decorated windows to be given input focus by WM */
 268                         wmHint.input =
 269                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 270                         wmHint.initial_state = ((window.type == TYPE_DOCK) ?
 271                                                 WithdrawnState : NormalState);
 272
 273                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 274                                 argc, NULL, &wmHint, &classHint);
 275
 276                         /* Sets an empty WM_PROTOCOLS property */
 277                         XSetWMProtocols(display, window.window, NULL, 0);
 278
 279                         /* Set window type */
 280                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 281                                 Atom prop;
 282
 283                                 switch (window.type) {
 284                                         case TYPE_DESKTOP:
 285                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 286                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 287                                                 fflush(stderr);
 288                                                 break;
 289                                         case TYPE_DOCK:
 290                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 291                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 292                                                 fflush(stderr);
 293                                                 break;
 294                                         case TYPE_NORMAL:
 295                                         default:
 296                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 297                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 298                                                 fflush(stderr);
 299                                                 break;
 300                                 }
 301                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 302                                         PropModeReplace, (unsigned char *) &prop, 1);
 303                         }
 304
 305                         /* Set desired hints */
 306
 307                         /* Window decorations */
 308                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 309                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 310                                 fflush(stderr); */
 311
 312                                 xa = ATOM(_MOTIF_WM_HINTS);
 313                                 if (xa != None) {
 314                                         long prop[5] = { 2, 0, 0, 0, 0 };
 315                                         XChangeProperty(display, window.window, xa, xa, 32,
 316                                                 PropModeReplace, (unsigned char *) prop, 5);
 317                                 }
 318                         }
 319
 320                         /* Below other windows */
 321                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 322                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 323                                 fflush(stderr); */
 324
 325                                 xa = ATOM(_WIN_LAYER);
 326                                 if (xa != None) {
 327                                         long prop = 0;
 328
 329                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 330                                                 PropModeAppend, (unsigned char *) &prop, 1);
 331                                 }
 332
 333                                 xa = ATOM(_NET_WM_STATE);
 334                                 if (xa != None) {
 335                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 336
 337                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 338                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 339                                 }
 340                         }
 341
 342                         /* Above other windows */
 343                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 344                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 345                                 fflush(stderr); */
 346
 347                                 xa = ATOM(_WIN_LAYER);
 348                                 if (xa != None) {
 349                                         long prop = 6;
 350
 351                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 352                                                 PropModeAppend, (unsigned char *) &prop, 1);
 353                                 }
 354
 355                                 xa = ATOM(_NET_WM_STATE);
 356                                 if (xa != None) {
 357                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 358
 359                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 360                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 361                                 }
 362                         }
 363
 364                         /* Sticky */
 365                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 366                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 367                                 fflush(stderr); */
 368
 369                                 xa = ATOM(_NET_WM_DESKTOP);
 370                                 if (xa != None) {
 371                                         CARD32 xa_prop = 0xFFFFFFFF;
 372
 373                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 374                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 375                                 }
 376
 377                                 xa = ATOM(_NET_WM_STATE);
 378                                 if (xa != None) {
 379                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 380
 381                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 382                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 383                                 }
 384                         }
 385
 386                         /* Skip taskbar */
 387                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 388                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 389                                 fflush(stderr); */
 390
 391                                 xa = ATOM(_NET_WM_STATE);
 392                                 if (xa != None) {
 393                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 394
 395                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 396                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 397                                 }
 398                         }
 399
 400                         /* Skip pager */
 401                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 402                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 403                                 fflush(stderr); */
 404
 405                                 xa = ATOM(_NET_WM_STATE);
 406                                 if (xa != None) {
 407                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 408
 409                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 410                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 411                                 }
 412                         }
 413                 } /* else { window.type != TYPE_OVERRIDE */
 414
 415                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 416                         window.window);
 417                 fflush(stderr);
 418
 419                 XMapWindow(display, window.window);
 420         } else /* if (own_window) { */
 421 #endif
 422         /* root / desktop window */
 423         {
 424                 XWindowAttributes attrs;
 425
 426                 if (!window.window) {
 427                         window.window = find_desktop_window(&window.root, &window.desktop);
 428                 }
 429
 430                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 431                         window.width = attrs.width;
 432                         window.height = attrs.height;
 433                 }
 434
 435                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 436         }
 437
 438         /* Drawable is same as window. This may be changed by double buffering. */
 439         window.drawable = window.window;
 440
 441 #ifdef HAVE_XDBE
 442         if (use_xdbe) {
 443                 int major, minor;
 444
 445                 if (!XdbeQueryExtension(display, &major, &minor)) {
 446                         use_xdbe = 0;
 447                 } else {
 448                         window.back_buffer = XdbeAllocateBackBufferName(display,
 449                                 window.window, XdbeBackground);
 450                         if (window.back_buffer != None) {
 451                                 window.drawable = window.back_buffer;
 452                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 453                         } else {
 454                                 use_xdbe = 0;
 455                         }
 456                 }
 457                 if (!use_xdbe) {
 458                         ERR("failed to set up double buffer");
 459                 }
 460         }
 461         if (!use_xdbe) {
 462                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 463         }
 464 #endif
 465
 466         XFlush(display);
 467
 468         /* set_transparent_background(window.window);
 469          * must be done after double buffer stuff? */
 470 #ifdef OWN_WINDOW
 471         /* if (own_window) {
 472                 set_transparent_background(window.window);
 473                 XClearWindow(display, window.window);
 474         } */
 475 #endif
 476
 477 #ifdef OWN_WINDOW
 478         XSelectInput(display, window.window, ExposureMask |
 479                 (own_window ? (StructureNotifyMask | PropertyChangeMask |
 480                 ButtonPressMask | ButtonReleaseMask) : 0));
 481 #else
 482         XSelectInput(display, window.window, ExposureMask);
 483 #endif
 484 }
 485
 486 static Window find_subwindow(Window win, int w, int h)
 487 {
 488         unsigned int i, j;
 489         Window troot, parent, *children;
 490         unsigned int n;
 491
 492         /* search subwindows with same size as display or work area */
 493
 494         for (i = 0; i < 10; i++) {
 495                 XQueryTree(display, win, &troot, &parent, &children, &n);
 496
 497                 for (j = 0; j < n; j++) {
 498                         XWindowAttributes attrs;
 499
 500                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 501                                 /* Window must be mapped and same size as display or
 502                                  * work space */
 503                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 504                                                 && attrs.height == display_height)
 505                                                 || (attrs.width == w && attrs.height == h))) {
 506                                         win = children[j];
 507                                         break;
 508                                 }
 509                         }
 510                 }
 511
 512                 XFree(children);
 513                 if (j == n) {
 514                         break;
 515                 }
 516         }
 517
 518         return win;
 519 }
 520
 521 long get_x11_color(const char *name)
 522 {
 523         XColor color;
 524
 525         color.pixel = 0;
 526         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 527                 /* lets check if it's a hex colour with the # missing in front
 528                  * if yes, then do something about it */
 529                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 530
 531                 newname[0] = '#';
 532                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 533                 /* now lets try again */
 534                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 535                                 &color)) {
 536                         ERR("can't parse X color '%s'", name);
 537                         return 0xFF00FF;
 538                 }
 539         }
 540         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 541                 ERR("can't allocate X color '%s'", name);
 542         }
 543
 544         return (long) color.pixel;
 545 }
 546
 547 void create_gc(void)
 548 {
 549         XGCValues values;
 550
 551         values.graphics_exposures = 0;
 552         values.function = GXcopy;
 553         window.gc = XCreateGC(display, window.drawable,
 554                 GCFunction | GCGraphicsExposures, &values);
 555 }
 556
 557 void update_x11info(void)
 558 {
 559         struct information *current_info = &info;
 560         current_info->x11.monitor.number = XScreenCount(display);
 561         current_info->x11.monitor.current = XDefaultScreen(display);
 562 }
 563 #endif /* X11 */