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 #ifdef IMLIB2
  54 Visual  *visual;
  55 Colormap colourmap;
  56 int depth;
  57 #endif /* IMLIB2 */
  58 int display_width;
  59 int display_height;
  60 int screen;
  61 static int set_transparent;
  62 static int background_colour;
  63
  64 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  65 int workarea[4];
  66
  67 /* Window stuff */
  68 struct conky_window window;
  69
  70 /* local prototypes */
  71 static void update_workarea(void);
  72 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  73 static Window find_subwindow(Window win, int w, int h);
  74
  75 /* X11 initializer */
  76 void init_X11(const char *disp)
  77 {
  78         if ((display = XOpenDisplay(disp)) == NULL) {
  79                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  80         }
  81
  82         screen = DefaultScreen(display);
  83         display_width = DisplayWidth(display, screen);
  84         display_height = DisplayHeight(display, screen);
  85
  86         update_workarea();
  87 }
  88
  89 static void update_workarea(void)
  90 {
  91         Window root = RootWindow(display, screen);
  92         unsigned long nitems, bytes;
  93         unsigned char *buf = NULL;
  94         Atom type;
  95         int format;
  96
  97         /* default work area is display */
  98         workarea[0] = 0;
  99         workarea[1] = 0;
 100         workarea[2] = display_width;
 101         workarea[3] = display_height;
 102
 103         /* get current desktop */
 104         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP), 0, 1,
 105                         False, XA_CARDINAL, &type, &format, &nitems, &bytes, &buf)
 106                         == Success && type == XA_CARDINAL && nitems > 0) {
 107
 108                 // Currently unused
 109                 /* long desktop = *(long *) buf; */
 110
 111                 XFree(buf);
 112                 buf = 0;
 113         }
 114
 115         if (buf) {
 116                 XFree(buf);
 117                 buf = 0;
 118         }
 119 }
 120
 121 /* Find root window and desktop window.
 122  * Return desktop window on success,
 123  * and set root and desktop byref return values.
 124  * Return 0 on failure. */
 125 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 126 {
 127         Atom type;
 128         int format, i;
 129         unsigned long nitems, bytes;
 130         unsigned int n;
 131         Window root = RootWindow(display, screen);
 132         Window win = root;
 133         Window troot, parent, *children;
 134         unsigned char *buf = NULL;
 135
 136         if (!p_root || !p_desktop) {
 137                 return 0;
 138         }
 139
 140         /* some window managers set __SWM_VROOT to some child of root window */
 141
 142         XQueryTree(display, root, &troot, &parent, &children, &n);
 143         for (i = 0; i < (int) n; i++) {
 144                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 145                                 False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 146                                 == Success && type == XA_WINDOW) {
 147                         win = *(Window *) buf;
 148                         XFree(buf);
 149                         XFree(children);
 150                         fprintf(stderr,
 151                                 PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 152                                 win);
 153                         fflush(stderr);
 154                         *p_root = win;
 155                         *p_desktop = win;
 156                         return win;
 157                 }
 158
 159                 if (buf) {
 160                         XFree(buf);
 161                         buf = 0;
 162                 }
 163         }
 164         XFree(children);
 165
 166         /* get subwindows from root */
 167         win = find_subwindow(root, -1, -1);
 168
 169         update_workarea();
 170
 171         win = find_subwindow(win, workarea[2], workarea[3]);
 172
 173         if (buf) {
 174                 XFree(buf);
 175                 buf = 0;
 176         }
 177
 178         if (win != root) {
 179                 fprintf(stderr,
 180                         PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 181                         win, root);
 182         } else {
 183                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 184         }
 185
 186         fflush(stderr);
 187
 188         *p_root = root;
 189         *p_desktop = win;
 190
 191         return win;
 192 }
 193
 194 /* sets background to ParentRelative for the Window and all parents */
 195 void set_transparent_background(Window win)
 196 {
 197         static int colour_set = -1;
 198
 199         if (set_transparent) {
 200                 Window parent = win;
 201                 unsigned int i;
 202
 203                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 204                         Window r, *children;
 205                         unsigned int n;
 206
 207                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 208
 209                         XQueryTree(display, parent, &r, &parent, &children, &n);
 210                         XFree(children);
 211                 }
 212         } else if (colour_set != background_colour) {
 213                 XSetWindowBackground(display, win, background_colour);
 214                 colour_set = background_colour;
 215         }
 216         // XClearWindow(display, win); not sure why this was here
 217 }
 218
 219 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 220                 char **argv, int argc)
 221 {
 222         /* There seems to be some problems with setting transparent background
 223          * (on fluxbox this time). It doesn't happen always and I don't know why it
 224          * happens but I bet the bug is somewhere here. */
 225         set_transparent = set_trans;
 226         background_colour = back_colour;
 227
 228 #ifdef OWN_WINDOW
 229         if (own_window) {
 230
 231                 if (!find_desktop_window(&window.root, &window.desktop)) {
 232                         return;
 233                 }
 234
 235                 if (window.type == TYPE_OVERRIDE) {
 236
 237                         /* An override_redirect True window.
 238                          * No WM hints or button processing needed. */
 239                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 240                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 241                                 True, 0, 0 };
 242
 243                         /* Parent is desktop window (which might be a child of root) */
 244                         window.window = XCreateWindow(display, window.desktop, window.x,
 245                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 246                                 CWBackPixel | CWOverrideRedirect, &attrs);
 247
 248                         XLowerWindow(display, window.window);
 249
 250                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 251                         fflush(stderr);
 252                 } else { /* window.type != TYPE_OVERRIDE */
 253
 254                         /* A window managed by the window manager.
 255                          * Process hints and buttons. */
 256                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 257                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 258                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 259
 260                         XClassHint classHint;
 261                         XWMHints wmHint;
 262                         Atom xa;
 263
 264                         if (window.type == TYPE_DOCK) {
 265                                 window.x = window.y = 0;
 266                         }
 267                         /* Parent is root window so WM can take control */
 268                         window.window = XCreateWindow(display, window.root, window.x,
 269                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 270                                 CWBackPixel | CWOverrideRedirect, &attrs);
 271
 272                         classHint.res_name = window.class_name;
 273                         classHint.res_class = classHint.res_name;
 274
 275                         wmHint.flags = InputHint | StateHint;
 276                         /* allow decorated windows to be given input focus by WM */
 277                         wmHint.input =
 278                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 279                         wmHint.initial_state = ((window.type == TYPE_DOCK) ?
 280                                                 WithdrawnState : NormalState);
 281
 282                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 283                                 argc, NULL, &wmHint, &classHint);
 284
 285                         /* Sets an empty WM_PROTOCOLS property */
 286                         XSetWMProtocols(display, window.window, NULL, 0);
 287
 288                         /* Set window type */
 289                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 290                                 Atom prop;
 291
 292                                 switch (window.type) {
 293                                         case TYPE_DESKTOP:
 294                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 295                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 296                                                 fflush(stderr);
 297                                                 break;
 298                                         case TYPE_DOCK:
 299                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 300                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 301                                                 fflush(stderr);
 302                                                 break;
 303                                         case TYPE_NORMAL:
 304                                         default:
 305                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 306                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 307                                                 fflush(stderr);
 308                                                 break;
 309                                 }
 310                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 311                                         PropModeReplace, (unsigned char *) &prop, 1);
 312                         }
 313
 314                         /* Set desired hints */
 315
 316                         /* Window decorations */
 317                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 318                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 319                                 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, xa, 32,
 325                                                 PropModeReplace, (unsigned char *) prop, 5);
 326                                 }
 327                         }
 328
 329                         /* Below other windows */
 330                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 331                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 332                                 fflush(stderr); */
 333
 334                                 xa = ATOM(_WIN_LAYER);
 335                                 if (xa != None) {
 336                                         long prop = 0;
 337
 338                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 339                                                 PropModeAppend, (unsigned char *) &prop, 1);
 340                                 }
 341
 342                                 xa = ATOM(_NET_WM_STATE);
 343                                 if (xa != None) {
 344                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 345
 346                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 347                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 348                                 }
 349                         }
 350
 351                         /* Above other windows */
 352                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 353                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 354                                 fflush(stderr); */
 355
 356                                 xa = ATOM(_WIN_LAYER);
 357                                 if (xa != None) {
 358                                         long prop = 6;
 359
 360                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 361                                                 PropModeAppend, (unsigned char *) &prop, 1);
 362                                 }
 363
 364                                 xa = ATOM(_NET_WM_STATE);
 365                                 if (xa != None) {
 366                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 367
 368                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 369                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 370                                 }
 371                         }
 372
 373                         /* Sticky */
 374                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 375                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 376                                 fflush(stderr); */
 377
 378                                 xa = ATOM(_NET_WM_DESKTOP);
 379                                 if (xa != None) {
 380                                         CARD32 xa_prop = 0xFFFFFFFF;
 381
 382                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 383                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 384                                 }
 385
 386                                 xa = ATOM(_NET_WM_STATE);
 387                                 if (xa != None) {
 388                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 389
 390                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 391                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 392                                 }
 393                         }
 394
 395                         /* Skip taskbar */
 396                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 397                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 398                                 fflush(stderr); */
 399
 400                                 xa = ATOM(_NET_WM_STATE);
 401                                 if (xa != None) {
 402                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 403
 404                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 405                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 406                                 }
 407                         }
 408
 409                         /* Skip pager */
 410                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 411                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 412                                 fflush(stderr); */
 413
 414                                 xa = ATOM(_NET_WM_STATE);
 415                                 if (xa != None) {
 416                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 417
 418                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 419                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 420                                 }
 421                         }
 422                 } /* else { window.type != TYPE_OVERRIDE */
 423
 424                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 425                         window.window);
 426                 fflush(stderr);
 427
 428                 XMapWindow(display, window.window);
 429
 430         } else /* if (own_window) { */
 431 #endif
 432                 /* root / desktop window */
 433         {
 434                 XWindowAttributes attrs;
 435
 436                 if (!window.window) {
 437                         window.window = find_desktop_window(&window.root, &window.desktop);
 438                 }
 439
 440                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 441                         window.width = attrs.width;
 442                         window.height = attrs.height;
 443                 }
 444
 445                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 446         }
 447
 448         /* Drawable is same as window. This may be changed by double buffering. */
 449         window.drawable = window.window;
 450
 451 #ifdef HAVE_XDBE
 452         if (use_xdbe) {
 453                 int major, minor;
 454
 455                 if (!XdbeQueryExtension(display, &major, &minor)) {
 456                         use_xdbe = 0;
 457                 } else {
 458                         window.back_buffer = XdbeAllocateBackBufferName(display,
 459                                 window.window, XdbeBackground);
 460                         if (window.back_buffer != None) {
 461                                 window.drawable = window.back_buffer;
 462                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 463                         } else {
 464                                 use_xdbe = 0;
 465                         }
 466                 }
 467                 if (!use_xdbe) {
 468                         ERR("failed to set up double buffer");
 469                 }
 470         }
 471         if (!use_xdbe) {
 472                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 473         }
 474 #endif
 475 #ifdef IMLIB2
 476         visual = DefaultVisual(display, DefaultScreen(display));
 477         depth = DefaultDepth(display, DefaultScreen(display));
 478         colourmap = DefaultColormap(display, DefaultScreen(display));
 479         /* set our cache to 4MiB so it doesn't have to go hit the disk as long as */
 480         /* the images we use use less than 4MiB of RAM (that is uncompressed) */
 481         imlib_set_cache_size(4092 * 1024);
 482         /* set the font cache to 512KiB - again to avoid re-loading */
 483         imlib_set_font_cache_size(512 * 1024);
 484         /* set the maximum number of colors to allocate for 8bpp and less to 128 */
 485         imlib_set_color_usage(128);
 486         /* dither for depths < 24bpp */
 487         imlib_context_set_dither(1);
 488         /* set the display , visual, colormap and drawable we are using */
 489         imlib_context_set_display(display);
 490         imlib_context_set_visual(visual);
 491         imlib_context_set_colormap(colourmap);
 492         imlib_context_set_drawable(window.drawable);
 493 #endif /* IMLIB2 */
 494         XFlush(display);
 495
 496         /* set_transparent_background(window.window);
 497          * must be done after double buffer stuff? */
 498 #ifdef OWN_WINDOW
 499         /* if (own_window) {
 500                 set_transparent_background(window.window);
 501                 XClearWindow(display, window.window);
 502         } */
 503 #endif
 504
 505 #ifdef OWN_WINDOW
 506         XSelectInput(display, window.window, ExposureMask |
 507                 (own_window ? (StructureNotifyMask | PropertyChangeMask |
 508                 ButtonPressMask | ButtonReleaseMask) : 0));
 509 #else
 510         XSelectInput(display, window.window, ExposureMask);
 511 #endif
 512 }
 513
 514 static Window find_subwindow(Window win, int w, int h)
 515 {
 516         unsigned int i, j;
 517         Window troot, parent, *children;
 518         unsigned int n;
 519
 520         /* search subwindows with same size as display or work area */
 521
 522         for (i = 0; i < 10; i++) {
 523                 XQueryTree(display, win, &troot, &parent, &children, &n);
 524
 525                 for (j = 0; j < n; j++) {
 526                         XWindowAttributes attrs;
 527
 528                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 529                                 /* Window must be mapped and same size as display or
 530                                  * work space */
 531                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 532                                                 && attrs.height == display_height)
 533                                                 || (attrs.width == w && attrs.height == h))) {
 534                                         win = children[j];
 535                                         break;
 536                                 }
 537                         }
 538                 }
 539
 540                 XFree(children);
 541                 if (j == n) {
 542                         break;
 543                 }
 544         }
 545
 546         return win;
 547 }
 548
 549 long get_x11_color(const char *name)
 550 {
 551         XColor color;
 552
 553         color.pixel = 0;
 554         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 555                 /* lets check if it's a hex colour with the # missing in front
 556                  * if yes, then do something about it */
 557                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 558
 559                 newname[0] = '#';
 560                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 561                 /* now lets try again */
 562                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 563                                 &color)) {
 564                         ERR("can't parse X color '%s'", name);
 565                         return 0xFF00FF;
 566                 }
 567         }
 568         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 569                 ERR("can't allocate X color '%s'", name);
 570         }
 571
 572         return (long) color.pixel;
 573 }
 574
 575 void create_gc(void)
 576 {
 577         XGCValues values;
 578
 579         values.graphics_exposures = 0;
 580         values.function = GXcopy;
 581         window.gc = XCreateGC(display, window.drawable,
 582                 GCFunction | GCGraphicsExposures, &values);
 583 }
 584
 585 void update_x11info(void)
 586 {
 587         struct information *current_info = &info;
 588         current_info->x11.monitor.number = XScreenCount(display);
 589         current_info->x11.monitor.current = XDefaultScreen(display);
 590 }