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 = NULL;
  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) {
  74                 if ((display = XOpenDisplay(disp)) == NULL) {
  75                         CRIT_ERR("can't open display: %s", XDisplayName(0));
  76                 }
  77         }
  78
  79         screen = DefaultScreen(display);
  80         display_width = DisplayWidth(display, screen);
  81         display_height = DisplayHeight(display, screen);
  82
  83         update_workarea();
  84 }
  85
  86 static void update_workarea(void)
  87 {
  88         Window root = RootWindow(display, screen);
  89         unsigned long nitems, bytes;
  90         unsigned char *buf = NULL;
  91         Atom type;
  92         int format;
  93
  94         /* default work area is display */
  95         workarea[0] = 0;
  96         workarea[1] = 0;
  97         workarea[2] = display_width;
  98         workarea[3] = display_height;
  99
 100         /* get current desktop */
 101         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP), 0, 1,
 102                         False, XA_CARDINAL, &type, &format, &nitems, &bytes, &buf)
 103                         == Success && type == XA_CARDINAL && nitems > 0) {
 104
 105                 // Currently unused
 106                 /* long desktop = *(long *) buf; */
 107
 108                 XFree(buf);
 109                 buf = 0;
 110         }
 111
 112         if (buf) {
 113                 XFree(buf);
 114                 buf = 0;
 115         }
 116 }
 117
 118 /* Find root window and desktop window.
 119  * Return desktop window on success,
 120  * and set root and desktop byref return values.
 121  * Return 0 on failure. */
 122 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 123 {
 124         Atom type;
 125         int format, i;
 126         unsigned long nitems, bytes;
 127         unsigned int n;
 128         Window root = RootWindow(display, screen);
 129         Window win = root;
 130         Window troot, parent, *children;
 131         unsigned char *buf = NULL;
 132
 133         if (!p_root || !p_desktop) {
 134                 return 0;
 135         }
 136
 137         /* some window managers set __SWM_VROOT to some child of root window */
 138
 139         XQueryTree(display, root, &troot, &parent, &children, &n);
 140         for (i = 0; i < (int) n; i++) {
 141                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 142                                 False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 143                                 == Success && type == XA_WINDOW) {
 144                         win = *(Window *) buf;
 145                         XFree(buf);
 146                         XFree(children);
 147                         fprintf(stderr,
 148                                 PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 149                                 win);
 150                         fflush(stderr);
 151                         *p_root = win;
 152                         *p_desktop = win;
 153                         return win;
 154                 }
 155
 156                 if (buf) {
 157                         XFree(buf);
 158                         buf = 0;
 159                 }
 160         }
 161         XFree(children);
 162
 163         /* get subwindows from root */
 164         win = find_subwindow(root, -1, -1);
 165
 166         update_workarea();
 167
 168         win = find_subwindow(win, workarea[2], workarea[3]);
 169
 170         if (buf) {
 171                 XFree(buf);
 172                 buf = 0;
 173         }
 174
 175         if (win != root) {
 176                 fprintf(stderr,
 177                         PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 178                         win, root);
 179         } else {
 180                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 181         }
 182
 183         fflush(stderr);
 184
 185         *p_root = root;
 186         *p_desktop = win;
 187
 188         return win;
 189 }
 190
 191 /* sets background to ParentRelative for the Window and all parents */
 192 void set_transparent_background(Window win)
 193 {
 194         static int colour_set = -1;
 195
 196         if (set_transparent) {
 197                 Window parent = win;
 198                 unsigned int i;
 199
 200                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 201                         Window r, *children;
 202                         unsigned int n;
 203
 204                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 205
 206                         XQueryTree(display, parent, &r, &parent, &children, &n);
 207                         XFree(children);
 208                 }
 209         } else if (colour_set != background_colour) {
 210                 XSetWindowBackground(display, win, background_colour);
 211                 colour_set = background_colour;
 212         }
 213         // XClearWindow(display, win); not sure why this was here
 214 }
 215
 216 void destroy_window(void)
 217 {
 218         XDestroyWindow(display, window.window);
 219         memset(&window, 0, sizeof(struct conky_window));
 220 }
 221
 222 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 223                 char **argv, int argc)
 224 {
 225         /* There seems to be some problems with setting transparent background
 226          * (on fluxbox this time). It doesn't happen always and I don't know why it
 227          * happens but I bet the bug is somewhere here. */
 228         set_transparent = set_trans;
 229         background_colour = back_colour;
 230
 231 #ifdef OWN_WINDOW
 232         if (own_window) {
 233                 if (!find_desktop_window(&window.root, &window.desktop)) {
 234                         return;
 235                 }
 236
 237                 if (window.type == TYPE_OVERRIDE) {
 238
 239                         /* An override_redirect True window.
 240                          * No WM hints or button processing needed. */
 241                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 242                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 243                                 True, 0, 0 };
 244
 245                         /* Parent is desktop window (which might be a child of root) */
 246                         window.window = XCreateWindow(display, window.desktop, window.x,
 247                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 248                                 CWBackPixel | CWOverrideRedirect, &attrs);
 249
 250                         XLowerWindow(display, window.window);
 251
 252                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 253                         fflush(stderr);
 254                 } else { /* window.type != TYPE_OVERRIDE */
 255
 256                         /* A window managed by the window manager.
 257                          * Process hints and buttons. */
 258                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 259                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 260                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 261
 262                         XClassHint classHint;
 263                         XWMHints wmHint;
 264                         Atom xa;
 265
 266                         if (window.type == TYPE_DOCK) {
 267                                 window.x = window.y = 0;
 268                         }
 269                         /* Parent is root window so WM can take control */
 270                         window.window = XCreateWindow(display, window.root, window.x,
 271                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 272                                 CWBackPixel | CWOverrideRedirect, &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 =
 280                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 281                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 282                                 wmHint.initial_state = WithdrawnState;
 283                         } else {
 284                                 wmHint.initial_state = NormalState;
 285                         }
 286
 287                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 288                                 argc, NULL, &wmHint, &classHint);
 289
 290                         /* Sets an empty WM_PROTOCOLS property */
 291                         XSetWMProtocols(display, window.window, NULL, 0);
 292
 293                         /* Set window type */
 294                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 295                                 Atom prop;
 296
 297                                 switch (window.type) {
 298                                         case TYPE_DESKTOP:
 299                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 300                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 301                                                 fflush(stderr);
 302                                                 break;
 303                                         case TYPE_DOCK:
 304                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 305                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 306                                                 fflush(stderr);
 307                                                 break;
 308                                         case TYPE_PANEL:
 309                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 310                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 311                                                 fflush(stderr);
 312                                                 break;
 313                                         case TYPE_NORMAL:
 314                                         default:
 315                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 316                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 317                                                 fflush(stderr);
 318                                                 break;
 319                                 }
 320                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 321                                         PropModeReplace, (unsigned char *) &prop, 1);
 322                         }
 323
 324                         /* Set desired hints */
 325
 326                         /* Window decorations */
 327                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 328                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 329                                 fflush(stderr); */
 330
 331                                 xa = ATOM(_MOTIF_WM_HINTS);
 332                                 if (xa != None) {
 333                                         long prop[5] = { 2, 0, 0, 0, 0 };
 334                                         XChangeProperty(display, window.window, xa, xa, 32,
 335                                                 PropModeReplace, (unsigned char *) prop, 5);
 336                                 }
 337                         }
 338
 339                         /* Below other windows */
 340                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 341                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 342                                 fflush(stderr); */
 343
 344                                 xa = ATOM(_WIN_LAYER);
 345                                 if (xa != None) {
 346                                         long prop = 0;
 347
 348                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 349                                                 PropModeAppend, (unsigned char *) &prop, 1);
 350                                 }
 351
 352                                 xa = ATOM(_NET_WM_STATE);
 353                                 if (xa != None) {
 354                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 355
 356                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 357                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 358                                 }
 359                         }
 360
 361                         /* Above other windows */
 362                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 363                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 364                                 fflush(stderr); */
 365
 366                                 xa = ATOM(_WIN_LAYER);
 367                                 if (xa != None) {
 368                                         long prop = 6;
 369
 370                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 371                                                 PropModeAppend, (unsigned char *) &prop, 1);
 372                                 }
 373
 374                                 xa = ATOM(_NET_WM_STATE);
 375                                 if (xa != None) {
 376                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 377
 378                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 379                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 380                                 }
 381                         }
 382
 383                         /* Sticky */
 384                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 385                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 386                                 fflush(stderr); */
 387
 388                                 xa = ATOM(_NET_WM_DESKTOP);
 389                                 if (xa != None) {
 390                                         CARD32 xa_prop = 0xFFFFFFFF;
 391
 392                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 393                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 394                                 }
 395
 396                                 xa = ATOM(_NET_WM_STATE);
 397                                 if (xa != None) {
 398                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 399
 400                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 401                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 402                                 }
 403                         }
 404
 405                         /* Skip taskbar */
 406                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 407                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 408                                 fflush(stderr); */
 409
 410                                 xa = ATOM(_NET_WM_STATE);
 411                                 if (xa != None) {
 412                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 413
 414                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 415                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 416                                 }
 417                         }
 418
 419                         /* Skip pager */
 420                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 421                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 422                                 fflush(stderr); */
 423
 424                                 xa = ATOM(_NET_WM_STATE);
 425                                 if (xa != None) {
 426                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 427
 428                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 429                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 430                                 }
 431                         }
 432                 } /* else { window.type != TYPE_OVERRIDE */
 433
 434                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 435                         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
 450                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 451                         window.width = attrs.width;
 452                         window.height = attrs.height;
 453                 }
 454
 455                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 456         }
 457
 458         /* Drawable is same as window. This may be changed by double buffering. */
 459         window.drawable = window.window;
 460
 461 #ifdef HAVE_XDBE
 462         if (use_xdbe) {
 463                 int major, minor;
 464
 465                 if (!XdbeQueryExtension(display, &major, &minor)) {
 466                         use_xdbe = 0;
 467                 } else {
 468                         window.back_buffer = XdbeAllocateBackBufferName(display,
 469                                 window.window, XdbeBackground);
 470                         if (window.back_buffer != None) {
 471                                 window.drawable = window.back_buffer;
 472                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 473                         } else {
 474                                 use_xdbe = 0;
 475                         }
 476                 }
 477                 if (!use_xdbe) {
 478                         ERR("failed to set up double buffer");
 479                 }
 480         }
 481         if (!use_xdbe) {
 482                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 483         }
 484 #endif
 485 #ifdef IMLIB2
 486         {
 487                 Visual *visual;
 488                 Colormap colourmap;
 489                 visual = DefaultVisual(display, DefaultScreen(display));
 490                 colourmap = DefaultColormap(display, DefaultScreen(display));
 491                 cimlib_init(display, window.drawable, visual, colourmap);
 492         }
 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         XSelectInput(display, window.window, ExposureMask
 506 #ifdef OWN_WINDOW
 507                 | (own_window ? (StructureNotifyMask | PropertyChangeMask |
 508                 ButtonPressMask | ButtonReleaseMask) : 0)
 509 #endif
 510                 );
 511 }
 512
 513 static Window find_subwindow(Window win, int w, int h)
 514 {
 515         unsigned int i, j;
 516         Window troot, parent, *children;
 517         unsigned int n;
 518
 519         /* search subwindows with same size as display or work area */
 520
 521         for (i = 0; i < 10; i++) {
 522                 XQueryTree(display, win, &troot, &parent, &children, &n);
 523
 524                 for (j = 0; j < n; j++) {
 525                         XWindowAttributes attrs;
 526
 527                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 528                                 /* Window must be mapped and same size as display or
 529                                  * work space */
 530                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 531                                                 && attrs.height == display_height)
 532                                                 || (attrs.width == w && attrs.height == h))) {
 533                                         win = children[j];
 534                                         break;
 535                                 }
 536                         }
 537                 }
 538
 539                 XFree(children);
 540                 if (j == n) {
 541                         break;
 542                 }
 543         }
 544
 545         return win;
 546 }
 547
 548 long get_x11_color(const char *name)
 549 {
 550         XColor color;
 551
 552         color.pixel = 0;
 553         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 554                 /* lets check if it's a hex colour with the # missing in front
 555                  * if yes, then do something about it */
 556                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 557
 558                 newname[0] = '#';
 559                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 560                 /* now lets try again */
 561                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 562                                 &color)) {
 563                         ERR("can't parse X color '%s'", name);
 564                         return 0xFF00FF;
 565                 }
 566         }
 567         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 568                 ERR("can't allocate X color '%s'", name);
 569         }
 570
 571         return (long) color.pixel;
 572 }
 573
 574 void create_gc(void)
 575 {
 576         XGCValues values;
 577
 578         values.graphics_exposures = 0;
 579         values.function = GXcopy;
 580         window.gc = XCreateGC(display, window.drawable,
 581                 GCFunction | GCGraphicsExposures, &values);
 582 }
 583
 584 void update_x11info(void)
 585 {
 586         struct information *current_info = &info;
 587         current_info->x11.monitor.number = XScreenCount(display);
 588         current_info->x11.monitor.current = XDefaultScreen(display);
 589 }
 590
 591 /* reserve window manager space */
 592 void set_struts(int sidenum)
 593 {
 594         Atom strut;
 595         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 596                 /* reserve space at left, right, top, bottom */
 597                 signed long sizes[12] = {0};
 598                 int i;
 599
 600                 /* define strut depth */
 601                 switch (sidenum) {
 602                         case 0:
 603                         {
 604                                 /* left side */
 605                                 sizes[0] = window.x + window.width;
 606                                 break;
 607                         }
 608                         case 1:
 609                         {
 610                                 /* right side */
 611                                 sizes[1] = display_width - window.x;
 612                                 break;
 613                         }
 614                         case 2:
 615                         {
 616                                 /* top side */
 617                                 sizes[2] = window.y + window.height;
 618                                 break;
 619                         }
 620                         case 3:
 621                         {
 622                                 /* bottom side */
 623                                 sizes[3] = display_height - window.y;
 624                                 break;
 625                         }
 626                 }
 627
 628                 /* define partial strut length */
 629                 if (sidenum <= 1) {
 630                         sizes[4 + (sidenum*2)] = window.y;
 631                         sizes[5 + (sidenum*2)] = window.y + window.height;
 632                 } else if (sidenum <= 3) {
 633                         sizes[4 + (sidenum*2)] = window.x;
 634                         sizes[5 + (sidenum*2)] = window.x + window.width;
 635                 }
 636
 637                 /* check constraints */
 638                 for (i = 0; i < 12; i++) {
 639                         if (sizes[i] < 0) {
 640                                 sizes[i] = 0;
 641                         } else {
 642                                 if (i <= 1 || i >= 8) {
 643                                         if (sizes[i] > display_width) {
 644                                                 sizes[i] = display_width;
 645                                         }
 646                                 } else {
 647                                         if (sizes[i] > display_height) {
 648                                                 sizes[i] = display_height;
 649                                         }
 650                                 }
 651                         }
 652                 }
 653
 654                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 655                                 PropModeReplace, (unsigned char *) &sizes, 4);
 656
 657                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 658                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 659                                         PropModeReplace, (unsigned char *) &sizes, 12);
 660                 }
 661         }
 662 }