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