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