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) 2005-2009 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 #ifdef IMLIB2
  39 #include "imlib2.h"
  40 #endif /* IMLIB2 */
  41
  42 #ifdef XFT
  43 #include <X11/Xft/Xft.h>
  44 int use_xft = 0;
  45 #endif
  46
  47 #ifdef HAVE_XDBE
  48 int use_xdbe;
  49 #endif
  50
  51 /* some basic X11 stuff */
  52 Display *display;
  53 int display_width;
  54 int display_height;
  55 int screen;
  56 static int set_transparent;
  57 static int background_colour;
  58
  59 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  60 int workarea[4];
  61
  62 /* Window stuff */
  63 struct conky_window window;
  64
  65 /* local prototypes */
  66 static void update_workarea(void);
  67 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  68 static Window find_subwindow(Window win, int w, int h);
  69
  70 /* X11 initializer */
  71 void init_X11(const char *disp)
  72 {
  73         if ((display = XOpenDisplay(disp)) == NULL) {
  74                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  75         }
  76
  77         screen = DefaultScreen(display);
  78         display_width = DisplayWidth(display, screen);
  79         display_height = DisplayHeight(display, screen);
  80
  81         update_workarea();
  82 }
  83
  84 static void update_workarea(void)
  85 {
  86         Window root = RootWindow(display, screen);
  87         unsigned long nitems, bytes;
  88         unsigned char *buf = NULL;
  89         Atom type;
  90         int format;
  91
  92         /* default work area is display */
  93         workarea[0] = 0;
  94         workarea[1] = 0;
  95         workarea[2] = display_width;
  96         workarea[3] = display_height;
  97
  98         /* get current desktop */
  99         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP), 0, 1,
 100                         False, XA_CARDINAL, &type, &format, &nitems, &bytes, &buf)
 101                         == Success && type == XA_CARDINAL && nitems > 0) {
 102
 103                 // Currently unused
 104                 /* long desktop = *(long *) buf; */
 105
 106                 XFree(buf);
 107                 buf = 0;
 108         }
 109
 110         if (buf) {
 111                 XFree(buf);
 112                 buf = 0;
 113         }
 114 }
 115
 116 /* Find root window and desktop window.
 117  * Return desktop window on success,
 118  * and set root and desktop byref return values.
 119  * Return 0 on failure. */
 120 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 121 {
 122         Atom type;
 123         int format, i;
 124         unsigned long nitems, bytes;
 125         unsigned int n;
 126         Window root = RootWindow(display, screen);
 127         Window win = root;
 128         Window troot, parent, *children;
 129         unsigned char *buf = NULL;
 130
 131         if (!p_root || !p_desktop) {
 132                 return 0;
 133         }
 134
 135         /* some window managers set __SWM_VROOT to some child of root window */
 136
 137         XQueryTree(display, root, &troot, &parent, &children, &n);
 138         for (i = 0; i < (int) n; i++) {
 139                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 140                                 False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 141                                 == Success && type == XA_WINDOW) {
 142                         win = *(Window *) buf;
 143                         XFree(buf);
 144                         XFree(children);
 145                         fprintf(stderr,
 146                                 PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 147                                 win);
 148                         fflush(stderr);
 149                         *p_root = win;
 150                         *p_desktop = win;
 151                         return win;
 152                 }
 153
 154                 if (buf) {
 155                         XFree(buf);
 156                         buf = 0;
 157                 }
 158         }
 159         XFree(children);
 160
 161         /* get subwindows from root */
 162         win = find_subwindow(root, -1, -1);
 163
 164         update_workarea();
 165
 166         win = find_subwindow(win, workarea[2], workarea[3]);
 167
 168         if (buf) {
 169                 XFree(buf);
 170                 buf = 0;
 171         }
 172
 173         if (win != root) {
 174                 fprintf(stderr,
 175                         PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 176                         win, root);
 177         } else {
 178                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 179         }
 180
 181         fflush(stderr);
 182
 183         *p_root = root;
 184         *p_desktop = win;
 185
 186         return win;
 187 }
 188
 189 /* sets background to ParentRelative for the Window and all parents */
 190 void set_transparent_background(Window win)
 191 {
 192         static int colour_set = -1;
 193
 194         if (set_transparent) {
 195                 Window parent = win;
 196                 unsigned int i;
 197
 198                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 199                         Window r, *children;
 200                         unsigned int n;
 201
 202                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 203
 204                         XQueryTree(display, parent, &r, &parent, &children, &n);
 205                         XFree(children);
 206                 }
 207         } else if (colour_set != background_colour) {
 208                 XSetWindowBackground(display, win, background_colour);
 209                 colour_set = background_colour;
 210         }
 211         // XClearWindow(display, win); not sure why this was here
 212 }
 213
 214 void destroy_window(void)
 215 {
 216         XDestroyWindow(display, window.window);
 217         memset(&window, 0, sizeof(struct conky_window));
 218 }
 219
 220 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 221                 char **argv, int argc)
 222 {
 223         /* There seems to be some problems with setting transparent background
 224          * (on fluxbox this time). It doesn't happen always and I don't know why it
 225          * happens but I bet the bug is somewhere here. */
 226         set_transparent = set_trans;
 227         background_colour = back_colour;
 228
 229 #ifdef OWN_WINDOW
 230         if (own_window) {
 231
 232                 if (!find_desktop_window(&window.root, &window.desktop)) {
 233                         return;
 234                 }
 235
 236                 if (window.type == TYPE_OVERRIDE) {
 237
 238                         /* An override_redirect True window.
 239                          * No WM hints or button processing needed. */
 240                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 241                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 242                                 True, 0, 0 };
 243
 244                         /* Parent is desktop window (which might be a child of root) */
 245                         window.window = XCreateWindow(display, window.desktop, window.x,
 246                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 247                                 CWBackPixel | CWOverrideRedirect, &attrs);
 248
 249                         XLowerWindow(display, window.window);
 250
 251                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 252                         fflush(stderr);
 253                 } else { /* window.type != TYPE_OVERRIDE */
 254
 255                         /* A window managed by the window manager.
 256                          * Process hints and buttons. */
 257                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 258                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 259                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 260
 261                         XClassHint classHint;
 262                         XWMHints wmHint;
 263                         Atom xa;
 264
 265                         if (window.type == TYPE_DOCK) {
 266                                 window.x = window.y = 0;
 267                         }
 268                         /* Parent is root window so WM can take control */
 269                         window.window = XCreateWindow(display, window.root, window.x,
 270                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 271                                 CWBackPixel | CWOverrideRedirect, &attrs);
 272
 273                         classHint.res_name = window.class_name;
 274                         classHint.res_class = classHint.res_name;
 275
 276                         wmHint.flags = InputHint | StateHint;
 277                         /* allow decorated windows to be given input focus by WM */
 278                         wmHint.input =
 279                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 280                         wmHint.initial_state = ((window.type == TYPE_DOCK) ?
 281                                                 WithdrawnState : NormalState);
 282
 283                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 284                                 argc, NULL, &wmHint, &classHint);
 285
 286                         /* Sets an empty WM_PROTOCOLS property */
 287                         XSetWMProtocols(display, window.window, NULL, 0);
 288
 289                         /* Set window type */
 290                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 291                                 Atom prop;
 292
 293                                 switch (window.type) {
 294                                         case TYPE_DESKTOP:
 295                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 296                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 297                                                 fflush(stderr);
 298                                                 break;
 299                                         case TYPE_DOCK:
 300                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 301                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 302                                                 fflush(stderr);
 303                                                 break;
 304                                         case TYPE_NORMAL:
 305                                         default:
 306                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 307                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 308                                                 fflush(stderr);
 309                                                 break;
 310                                 }
 311                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 312                                         PropModeReplace, (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, PACKAGE_NAME": hint - undecorated\n");
 320                                 fflush(stderr); */
 321
 322                                 xa = ATOM(_MOTIF_WM_HINTS);
 323                                 if (xa != None) {
 324                                         long prop[5] = { 2, 0, 0, 0, 0 };
 325                                         XChangeProperty(display, window.window, xa, xa, 32,
 326                                                 PropModeReplace, (unsigned char *) prop, 5);
 327                                 }
 328                         }
 329
 330                         /* Below other windows */
 331                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 332                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 333                                 fflush(stderr); */
 334
 335                                 xa = ATOM(_WIN_LAYER);
 336                                 if (xa != None) {
 337                                         long prop = 0;
 338
 339                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 340                                                 PropModeAppend, (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
 347                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 348                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 349                                 }
 350                         }
 351
 352                         /* Above other windows */
 353                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 354                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 355                                 fflush(stderr); */
 356
 357                                 xa = ATOM(_WIN_LAYER);
 358                                 if (xa != None) {
 359                                         long prop = 6;
 360
 361                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 362                                                 PropModeAppend, (unsigned char *) &prop, 1);
 363                                 }
 364
 365                                 xa = ATOM(_NET_WM_STATE);
 366                                 if (xa != None) {
 367                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 368
 369                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 370                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 371                                 }
 372                         }
 373
 374                         /* Sticky */
 375                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 376                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 377                                 fflush(stderr); */
 378
 379                                 xa = ATOM(_NET_WM_DESKTOP);
 380                                 if (xa != None) {
 381                                         CARD32 xa_prop = 0xFFFFFFFF;
 382
 383                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 384                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 385                                 }
 386
 387                                 xa = ATOM(_NET_WM_STATE);
 388                                 if (xa != None) {
 389                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 390
 391                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 392                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 393                                 }
 394                         }
 395
 396                         /* Skip taskbar */
 397                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 398                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 399                                 fflush(stderr); */
 400
 401                                 xa = ATOM(_NET_WM_STATE);
 402                                 if (xa != None) {
 403                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 404
 405                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 406                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 407                                 }
 408                         }
 409
 410                         /* Skip pager */
 411                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 412                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 413                                 fflush(stderr); */
 414
 415                                 xa = ATOM(_NET_WM_STATE);
 416                                 if (xa != None) {
 417                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 418
 419                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 420                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 421                                 }
 422                         }
 423                 } /* else { window.type != TYPE_OVERRIDE */
 424
 425                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 426                         window.window);
 427                 fflush(stderr);
 428
 429                 XMapWindow(display, window.window);
 430
 431         } else /* if (own_window) { */
 432 #endif
 433                 /* root / desktop window */
 434         {
 435                 XWindowAttributes attrs;
 436
 437                 if (!window.window) {
 438                         window.window = find_desktop_window(&window.root, &window.desktop);
 439                 }
 440
 441                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 442                         window.width = attrs.width;
 443                         window.height = attrs.height;
 444                 }
 445
 446                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 447         }
 448
 449         /* Drawable is same as window. This may be changed by double buffering. */
 450         window.drawable = window.window;
 451
 452 #ifdef HAVE_XDBE
 453         if (use_xdbe) {
 454                 int major, minor;
 455
 456                 if (!XdbeQueryExtension(display, &major, &minor)) {
 457                         use_xdbe = 0;
 458                 } else {
 459                         window.back_buffer = XdbeAllocateBackBufferName(display,
 460                                 window.window, XdbeBackground);
 461                         if (window.back_buffer != None) {
 462                                 window.drawable = window.back_buffer;
 463                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 464                         } else {
 465                                 use_xdbe = 0;
 466                         }
 467                 }
 468                 if (!use_xdbe) {
 469                         ERR("failed to set up double buffer");
 470                 }
 471         }
 472         if (!use_xdbe) {
 473                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 474         }
 475 #endif
 476 #ifdef IMLIB2
 477         {
 478                 Visual *visual;
 479                 Colormap colourmap;
 480                 visual = DefaultVisual(display, DefaultScreen(display));
 481                 colourmap = DefaultColormap(display, DefaultScreen(display));
 482                 cimlib_init(display, window.drawable, visual, colourmap);
 483         }
 484 #endif /* IMLIB2 */
 485         XFlush(display);
 486
 487         /* set_transparent_background(window.window);
 488          * must be done after double buffer stuff? */
 489 #ifdef OWN_WINDOW
 490         /* if (own_window) {
 491                 set_transparent_background(window.window);
 492                 XClearWindow(display, window.window);
 493         } */
 494 #endif
 495
 496 #ifdef OWN_WINDOW
 497         XSelectInput(display, window.window, ExposureMask |
 498                 (own_window ? (StructureNotifyMask | PropertyChangeMask |
 499                 ButtonPressMask | ButtonReleaseMask) : 0));
 500 #else
 501         XSelectInput(display, window.window, ExposureMask);
 502 #endif
 503 }
 504
 505 static Window find_subwindow(Window win, int w, int h)
 506 {
 507         unsigned int i, j;
 508         Window troot, parent, *children;
 509         unsigned int n;
 510
 511         /* search subwindows with same size as display or work area */
 512
 513         for (i = 0; i < 10; i++) {
 514                 XQueryTree(display, win, &troot, &parent, &children, &n);
 515
 516                 for (j = 0; j < n; j++) {
 517                         XWindowAttributes attrs;
 518
 519                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 520                                 /* Window must be mapped and same size as display or
 521                                  * work space */
 522                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 523                                                 && attrs.height == display_height)
 524                                                 || (attrs.width == w && 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
 537         return win;
 538 }
 539
 540 long get_x11_color(const char *name)
 541 {
 542         XColor color;
 543
 544         color.pixel = 0;
 545         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 546                 /* lets check if it's a hex colour with the # missing in front
 547                  * if yes, then do something about it */
 548                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 549
 550                 newname[0] = '#';
 551                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 552                 /* now lets try again */
 553                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 554                                 &color)) {
 555                         ERR("can't parse X color '%s'", name);
 556                         return 0xFF00FF;
 557                 }
 558         }
 559         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 560                 ERR("can't allocate X color '%s'", name);
 561         }
 562
 563         return (long) color.pixel;
 564 }
 565
 566 void create_gc(void)
 567 {
 568         XGCValues values;
 569
 570         values.graphics_exposures = 0;
 571         values.function = GXcopy;
 572         window.gc = XCreateGC(display, window.drawable,
 573                 GCFunction | GCGraphicsExposures, &values);
 574 }
 575
 576 void update_x11info(void)
 577 {
 578         struct information *current_info = &info;
 579         current_info->x11.monitor.number = XScreenCount(display);
 580         current_info->x11.monitor.current = XDefaultScreen(display);
 581 }