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

   1 /*
   2  * Conky, a system monitor, based on torsmo
   3  *
   4  * Any original torsmo code is licensed under the BSD license
   5  *
   6  * All code written since the fork of torsmo is licensed under the GPL
   7  *
   8  * Please see COPYING for details
   9  *
  10  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  11  * Copyright (c) 2005-2007 Brenden Matthews, Philip Kovacs, et. al. (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
  29 #include "conky.h"
  30
  31 #ifdef X11
  32 #include <X11/Xlib.h>
  33 #include <X11/Xatom.h>
  34 #include <X11/Xmd.h>
  35 #include <X11/Xutil.h>
  36 #ifdef XFT
  37 #include <X11/Xft/Xft.h>
  38 #endif
  39
  40 #ifdef HAVE_XDBE
  41 int use_xdbe;
  42 #endif
  43
  44 #ifdef XFT
  45 int use_xft = 0;
  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();
  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()
  69 {
  70         if ((display = XOpenDisplay(0)) == NULL)
  71                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  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()
  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),
  96                                0, 1, False, XA_CARDINAL, &type, &format,
  97                                &nitems, &bytes, &buf) == Success
  98             && type == XA_CARDINAL && nitems > 0) {
  99
 100                 //Currently unused
 101                 /*  long desktop = * (long *) buf; */
 102
 103                 XFree(buf);
 104                 buf = 0;
 105
 106         }
 107
 108         if (buf) {
 109                 XFree(buf);
 110                 buf = 0;
 111         }
 112 }
 113
 114 /* Find root window and desktop window.  Return desktop window on success,
 115  * and set root and desktop byref return values.  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         /* some window managers set __SWM_VROOT to some child of root window */
 131
 132         XQueryTree(display, root, &troot, &parent, &children, &n);
 133         for (i = 0; i < (int) n; i++) {
 134                 if (XGetWindowProperty
 135                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 136                      XA_WINDOW, &type, &format, &nitems, &bytes,
 137                      &buf) == 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", win);
 143                         fflush(stderr);
 144                         *p_root=win;
 145                         *p_desktop=win;
 146                         return win;
 147                 }
 148
 149                 if (buf) {
 150                         XFree(buf);
 151                         buf = 0;
 152                 }
 153         }
 154         XFree(children);
 155
 156         /* get subwindows from root */
 157         win = find_subwindow(root, -1, -1);
 158
 159         update_workarea();
 160
 161         win = find_subwindow(win, workarea[2], workarea[3]);
 162
 163         if (buf) {
 164                 XFree(buf);
 165                 buf = 0;
 166         }
 167
 168         if (win != root)
 169                 fprintf(stderr,
 170                         "Conky: desktop window (%lx) is subwindow of root window (%lx)\n",win,root);
 171         else
 172                 fprintf(stderr, "Conky: desktop window (%lx) is root window\n",win);
 173
 174         fflush(stderr);
 175
 176         *p_root=root;
 177         *p_desktop=win;
 178
 179         return win;
 180 }
 181
 182 /* sets background to ParentRelative for the Window and all parents */
 183 inline void set_transparent_background(Window win)
 184 {
 185         static int colour_set = -1;
 186         if (set_transparent) {
 187                 Window parent = win;
 188                 unsigned int i;
 189                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 190                         Window r, *children;
 191                         unsigned int n;
 192
 193                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 194
 195                         XQueryTree(display, parent, &r, &parent, &children, &n);
 196                         XFree(children);
 197                         }
 198         } else if (colour_set != background_colour) {
 199                 XSetWindowBackground(display, win, background_colour);
 200                 colour_set = background_colour;
 201 }
 202         //XClearWindow(display, win); not sure why this was here
 203 }
 204
 205 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 206                              char **argv, int argc)
 207 {
 208         /* There seems to be some problems with setting transparent background (on
 209          * fluxbox this time). It doesn't happen always and I don't know why it
 210          * happens but I bet the bug is somewhere here. */
 211         set_transparent = set_trans;
 212         background_colour = back_colour;
 213
 214 #ifdef OWN_WINDOW
 215         if (own_window) {
 216
 217                 if ( !find_desktop_window( &window.root, &window.desktop ) )
 218                         return;
 219
 220                 if (window.type == TYPE_OVERRIDE) {
 221
 222                         /*
 223                            An override_redirect True window.  No WM hints or button processing needed.
 224                         */
 225                         XSetWindowAttributes attrs = {
 226                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 227                                 StructureNotifyMask|ExposureMask,
 228                                 0L,
 229                                 True,
 230                                 0,0 };
 231
 232                         /* Parent is desktop window (which might be a child of root) */
 233                         window.window = XCreateWindow(display,
 234                                                    window.desktop,
 235                                                    window.x, window.y, w, h, 0,
 236                                                    CopyFromParent,
 237                                                    InputOutput,
 238                                                    CopyFromParent,
 239                                                    CWBackPixel|CWOverrideRedirect,
 240                                                    &attrs);
 241
 242                         XLowerWindow(display, window.window);
 243
 244                         fprintf(stderr, "Conky: window type - override\n"); fflush(stderr);
 245
 246                 }
 247
 248                 else { /* window.type != TYPE_OVERRIDE */
 249
 250                         /*
 251                            A window managed by the window manager.  Process hints and buttons.
 252                         */
 253                         XSetWindowAttributes attrs = {
 254                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 255                                 StructureNotifyMask|ExposureMask|ButtonPressMask|ButtonReleaseMask,
 256                                 0L,
 257                                 False,
 258                                 0,0 };
 259
 260                         XClassHint classHint;
 261                         XWMHints wmHint;
 262                         Atom xa;
 263
 264                         /* Parent is root window so WM can take control */
 265                         window.window = XCreateWindow(display,
 266                                                    window.root,
 267                                              window.x, window.y, w, h, 0,
 268                                                    CopyFromParent,
 269                                                    InputOutput,
 270                                                    CopyFromParent,
 271                                                    CWBackPixel|CWOverrideRedirect,
 272                                                    &attrs);
 273
 274                         classHint.res_name = window.class_name;
 275                         classHint.res_class = classHint.res_name;
 276
 277                         wmHint.flags = InputHint | StateHint;
 278       /* allow decorated windows to be given input focus by WM */
 279                         wmHint.input = TEST_HINT(window.hints,HINT_UNDECORATED) ? False : True;
 280                         wmHint.initial_state = NormalState;
 281
 282                         XmbSetWMProperties (display, window.window, window.title, NULL,
 283                                             argv, argc,
 284                                             NULL, &wmHint, &classHint);
 285
 286                         /* Sets an empty WM_PROTOCOLS property */
 287                         XSetWMProtocols(display,window.window,NULL,0);
 288
 289
 290                         /* Set window type */
 291                         if ( (xa = ATOM(_NET_WM_WINDOW_TYPE)) != None )
 292                         {
 293                                 Atom prop;
 294                                 switch(window.type) {
 295                                 case TYPE_DESKTOP:
 296                                         {
 297                                         prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 298                                         fprintf(stderr, "Conky: window type - desktop\n"); fflush(stderr);
 299                                         }
 300                                         break;
 301                                 case TYPE_NORMAL:
 302                                 default:
 303                                         {
 304                                         prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 305                                         fprintf(stderr, "Conky: window type - normal\n"); fflush(stderr);
 306                                         }
 307                                         break;
 308                                 }
 309                                 XChangeProperty(display, window.window, xa,
 310                                                 XA_ATOM, 32,
 311                                                 PropModeReplace,
 312                                                 (unsigned char *) &prop, 1);
 313                         }
 314
 315                         /* Set desired hints */
 316
 317                         /* Window decorations */
 318                         if (TEST_HINT(window.hints,HINT_UNDECORATED)) {
 319                             /*fprintf(stderr, "Conky: hint - undecorated\n"); fflush(stderr);*/
 320
 321                             xa = ATOM(_MOTIF_WM_HINTS);
 322                             if (xa != None) {
 323                                 long prop[5] = { 2, 0, 0, 0, 0 };
 324                                 XChangeProperty(display, window.window, xa,
 325                                                 xa, 32, PropModeReplace,
 326                                                 (unsigned char *) prop, 5);
 327                             }
 328                         }
 329
 330                         /* Below other windows */
 331                         if (TEST_HINT(window.hints,HINT_BELOW)) {
 332                             /*fprintf(stderr, "Conky: hint - below\n"); fflush(stderr); */
 333
 334                             xa = ATOM(_WIN_LAYER);
 335                             if (xa != None) {
 336                                 long prop = 0;
 337                                 XChangeProperty(display, window.window, xa,
 338                                                 XA_CARDINAL, 32,
 339                                                 PropModeAppend,
 340                                                 (unsigned char *) &prop, 1);
 341                             }
 342
 343                             xa = ATOM(_NET_WM_STATE);
 344                             if (xa != None) {
 345                                 Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 346                                 XChangeProperty(display, window.window, xa,
 347                                         XA_ATOM, 32,
 348                                         PropModeAppend,
 349                                         (unsigned char *) &xa_prop,
 350                                         1);
 351                             }
 352                         }
 353
 354                         /* Above other windows */
 355                         if (TEST_HINT(window.hints,HINT_ABOVE)) {
 356                             /*fprintf(stderr, "Conky: hint - above\n"); fflush(stderr);*/
 357
 358                             xa = ATOM(_WIN_LAYER);
 359                             if (xa != None) {
 360                                 long prop = 6;
 361                                 XChangeProperty(display, window.window, xa,
 362                                                 XA_CARDINAL, 32,
 363                                                 PropModeAppend,
 364                                                 (unsigned char *) &prop, 1);
 365                             }
 366
 367                             xa = ATOM(_NET_WM_STATE);
 368                             if (xa != None) {
 369                                 Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 370                                 XChangeProperty(display, window.window, xa,
 371                                         XA_ATOM, 32,
 372                                         PropModeAppend,
 373                                         (unsigned char *) &xa_prop,
 374                                         1);
 375                             }
 376                         }
 377
 378                         /* Sticky */
 379                         if (TEST_HINT(window.hints,HINT_STICKY)) {
 380                             /*fprintf(stderr, "Conky: hint - sticky\n"); fflush(stderr); */
 381
 382                             xa = ATOM(_NET_WM_DESKTOP);
 383                             if (xa != None) {
 384                                 CARD32 xa_prop = 0xFFFFFFFF;
 385                                 XChangeProperty(display, window.window, xa,
 386                                         XA_CARDINAL, 32,
 387                                         PropModeAppend,
 388                                         (unsigned char *) &xa_prop,
 389                                         1);
 390                             }
 391
 392                             xa = ATOM(_NET_WM_STATE);
 393                             if (xa != None) {
 394                                 Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 395                                 XChangeProperty(display, window.window, xa,
 396                                         XA_ATOM, 32,
 397                                         PropModeAppend,
 398                                         (unsigned char *) &xa_prop,
 399                                         1);
 400                             }
 401                         }
 402
 403                         /* Skip taskbar */
 404                         if (TEST_HINT(window.hints,HINT_SKIP_TASKBAR)) {
 405                             /*fprintf(stderr, "Conky: hint - skip_taskbar\n"); fflush(stderr);*/
 406
 407                             xa = ATOM(_NET_WM_STATE);
 408                             if (xa != None) {
 409                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 410                                 XChangeProperty(display, window.window, xa,
 411                                         XA_ATOM, 32,
 412                                         PropModeAppend,
 413                                         (unsigned char *) &xa_prop,
 414                                         1);
 415                             }
 416                         }
 417
 418                         /* Skip pager */
 419                         if (TEST_HINT(window.hints,HINT_SKIP_PAGER)) {
 420                             /*fprintf(stderr, "Conky: hint - skip_pager\n"); fflush(stderr);*/
 421
 422                             xa = ATOM(_NET_WM_STATE);
 423                             if (xa != None) {
 424                                 Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 425                                 XChangeProperty(display, window.window, xa,
 426                                         XA_ATOM, 32,
 427                                         PropModeAppend,
 428                                         (unsigned char *) &xa_prop,
 429                                         1);
 430                             }
 431                         }
 432
 433                 } /* else { window.type != TYPE_OVERRIDE */
 434
 435                 fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 436                 fflush(stderr);
 437
 438                 XMapWindow(display, window.window);
 439
 440         } else /* if (own_window) { */
 441 #endif
 442                 /* root / desktop window */
 443         {
 444                 XWindowAttributes attrs;
 445
 446                 if (!window.window)
 447                         window.window = find_desktop_window( &window.root, &window.desktop );
 448
 449                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 450                         window.width = attrs.width;
 451                         window.height = attrs.height;
 452                 }
 453
 454                 fprintf(stderr, "Conky: drawing to desktop window\n");
 455         }
 456
 457         /* Drawable is same as window. This may be changed by double buffering. */
 458         window.drawable = window.window;
 459
 460 #ifdef HAVE_XDBE
 461         if (use_xdbe) {
 462                 int major, minor;
 463                 if (!XdbeQueryExtension(display, &major, &minor)) {
 464                         use_xdbe = 0;
 465                 } else {
 466                         window.back_buffer =
 467                             XdbeAllocateBackBufferName(display,
 468                                                        window.window,
 469                                                        XdbeBackground);
 470                         if (window.back_buffer != None) {
 471                                 window.drawable = window.back_buffer;
 472                                 fprintf(stderr,
 473                                         "Conky: drawing to double buffer\n");
 474                         } else
 475                                 use_xdbe = 0;
 476                 }
 477                 if (!use_xdbe)
 478                         ERR("failed to set up double buffer");
 479         }
 480         if (!use_xdbe)
 481                 fprintf(stderr, "Conky: drawing to single buffer\n");
 482 #endif
 483
 484         XFlush(display);
 485
 486         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 487 #ifdef OWN_WINDOW
 488         /*if (own_window) {
 489         set_transparent_background(window.window);
 490                 XClearWindow(display, window.window);
 491 }*/
 492 #endif
 493
 494         XSelectInput(display, window.window, ExposureMask
 495 #ifdef OWN_WINDOW
 496                      | (own_window
 497                         ? (StructureNotifyMask | PropertyChangeMask |
 498                            ButtonPressMask | ButtonReleaseMask) : 0)
 499 #endif
 500             );
 501 }
 502
 503 static Window find_subwindow(Window win, int w, int h)
 504 {
 505         unsigned int i, j;
 506         Window troot, parent, *children;
 507         unsigned int n;
 508
 509         /* search subwindows with same size as display or work area */
 510
 511         for (i = 0; i < 10; i++) {
 512                 XQueryTree(display, win, &troot, &parent, &children, &n);
 513
 514                 for (j = 0; j < n; j++) {
 515                         XWindowAttributes attrs;
 516
 517                         if (XGetWindowAttributes
 518                             (display, children[j], &attrs)) {
 519                                 /* Window must be mapped and same size as display or work space */
 520                                 if (attrs.map_state != 0 &&
 521                                     ((attrs.width == display_width
 522                                       && attrs.height == display_height)
 523                                      || (attrs.width == w
 524                                          && attrs.height == h))) {
 525                                         win = children[j];
 526                                         break;
 527                                 }
 528                         }
 529                 }
 530
 531                 XFree(children);
 532                 if (j == n)
 533                         break;
 534         }
 535
 536         return win;
 537 }
 538
 539 long get_x11_color(const char *name)
 540 {
 541         XColor color;
 542         color.pixel = 0;
 543         if (!XParseColor
 544             (display, DefaultColormap(display, screen), name, &color)) {
 545                 /* lets check if it's a hex colour with the # missing in front
 546                  * if yes, then do something about it
 547                  */
 548                 char newname[64];
 549                 newname[0] = '#';
 550                 strncpy(&newname[1], name, 62);
 551                 /* now lets try again */
 552                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 553                         ERR("can't parse X color '%s'", name);
 554                         return 0xFF00FF;
 555                 }
 556         }
 557         if (!XAllocColor
 558             (display, DefaultColormap(display, screen), &color))
 559                 ERR("can't allocate X color '%s'", name);
 560
 561         return (long) color.pixel;
 562 }
 563
 564 void create_gc()
 565 {
 566         XGCValues values;
 567         values.graphics_exposures = 0;
 568         values.function = GXcopy;
 569         window.gc = XCreateGC(display, window.drawable,
 570                               GCFunction | GCGraphicsExposures, &values);
 571 }
 572
 573 #endif /* X11 */