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         XFreeGC(display, window.gc);
 220         memset(&window, 0, sizeof(struct conky_window));
 221 }
 222
 223 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 224                 char **argv, int argc)
 225 {
 226         /* There seems to be some problems with setting transparent background
 227          * (on fluxbox this time). It doesn't happen always and I don't know why it
 228          * happens but I bet the bug is somewhere here. */
 229         set_transparent = set_trans;
 230         background_colour = back_colour;
 231
 232 #ifdef OWN_WINDOW
 233         if (own_window) {
 234                 if (!find_desktop_window(&window.root, &window.desktop)) {
 235                         return;
 236                 }
 237
 238                 if (window.type == TYPE_OVERRIDE) {
 239
 240                         /* An override_redirect True window.
 241                          * No WM hints or button processing needed. */
 242                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 243                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 244                                 True, 0, 0 };
 245
 246                         /* Parent is desktop window (which might be a child of root) */
 247                         window.window = XCreateWindow(display, window.desktop, window.x,
 248                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 249                                 CWBackPixel | CWOverrideRedirect, &attrs);
 250
 251                         XLowerWindow(display, window.window);
 252
 253                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 254                         fflush(stderr);
 255                 } else { /* window.type != TYPE_OVERRIDE */
 256
 257                         /* A window managed by the window manager.
 258                          * Process hints and buttons. */
 259                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 260                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 261                                 ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 262
 263                         XClassHint classHint;
 264                         XWMHints wmHint;
 265                         Atom xa;
 266
 267                         if (window.type == TYPE_DOCK) {
 268                                 window.x = window.y = 0;
 269                         }
 270                         /* Parent is root window so WM can take control */
 271                         window.window = XCreateWindow(display, window.root, window.x,
 272                                 window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 273                                 CWBackPixel | CWOverrideRedirect, &attrs);
 274
 275                         classHint.res_name = window.class_name;
 276                         classHint.res_class = classHint.res_name;
 277
 278                         wmHint.flags = InputHint | StateHint;
 279                         /* allow decorated windows to be given input focus by WM */
 280                         wmHint.input =
 281                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 282                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 283                                 wmHint.initial_state = WithdrawnState;
 284                         } else {
 285                                 wmHint.initial_state = NormalState;
 286                         }
 287
 288                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 289                                 argc, NULL, &wmHint, &classHint);
 290
 291                         /* Sets an empty WM_PROTOCOLS property */
 292                         XSetWMProtocols(display, window.window, NULL, 0);
 293
 294                         /* Set window type */
 295                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 296                                 Atom prop;
 297
 298                                 switch (window.type) {
 299                                         case TYPE_DESKTOP:
 300                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 301                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 302                                                 fflush(stderr);
 303                                                 break;
 304                                         case TYPE_DOCK:
 305                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 306                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 307                                                 fflush(stderr);
 308                                                 break;
 309                                         case TYPE_PANEL:
 310                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 311                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 312                                                 fflush(stderr);
 313                                                 break;
 314                                         case TYPE_NORMAL:
 315                                         default:
 316                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 317                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 318                                                 fflush(stderr);
 319                                                 break;
 320                                 }
 321                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 322                                         PropModeReplace, (unsigned char *) &prop, 1);
 323                         }
 324
 325                         /* Set desired hints */
 326
 327                         /* Window decorations */
 328                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 329                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 330                                 fflush(stderr); */
 331
 332                                 xa = ATOM(_MOTIF_WM_HINTS);
 333                                 if (xa != None) {
 334                                         long prop[5] = { 2, 0, 0, 0, 0 };
 335                                         XChangeProperty(display, window.window, xa, xa, 32,
 336                                                 PropModeReplace, (unsigned char *) prop, 5);
 337                                 }
 338                         }
 339
 340                         /* Below other windows */
 341                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 342                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 343                                 fflush(stderr); */
 344
 345                                 xa = ATOM(_WIN_LAYER);
 346                                 if (xa != None) {
 347                                         long prop = 0;
 348
 349                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 350                                                 PropModeAppend, (unsigned char *) &prop, 1);
 351                                 }
 352
 353                                 xa = ATOM(_NET_WM_STATE);
 354                                 if (xa != None) {
 355                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 356
 357                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 358                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 359                                 }
 360                         }
 361
 362                         /* Above other windows */
 363                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 364                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 365                                 fflush(stderr); */
 366
 367                                 xa = ATOM(_WIN_LAYER);
 368                                 if (xa != None) {
 369                                         long prop = 6;
 370
 371                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 372                                                 PropModeAppend, (unsigned char *) &prop, 1);
 373                                 }
 374
 375                                 xa = ATOM(_NET_WM_STATE);
 376                                 if (xa != None) {
 377                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 378
 379                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 380                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 381                                 }
 382                         }
 383
 384                         /* Sticky */
 385                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 386                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 387                                 fflush(stderr); */
 388
 389                                 xa = ATOM(_NET_WM_DESKTOP);
 390                                 if (xa != None) {
 391                                         CARD32 xa_prop = 0xFFFFFFFF;
 392
 393                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 394                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 395                                 }
 396
 397                                 xa = ATOM(_NET_WM_STATE);
 398                                 if (xa != None) {
 399                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 400
 401                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 402                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 403                                 }
 404                         }
 405
 406                         /* Skip taskbar */
 407                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 408                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 409                                 fflush(stderr); */
 410
 411                                 xa = ATOM(_NET_WM_STATE);
 412                                 if (xa != None) {
 413                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 414
 415                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 416                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 417                                 }
 418                         }
 419
 420                         /* Skip pager */
 421                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 422                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 423                                 fflush(stderr); */
 424
 425                                 xa = ATOM(_NET_WM_STATE);
 426                                 if (xa != None) {
 427                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 428
 429                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 430                                                 PropModeAppend, (unsigned char *) &xa_prop, 1);
 431                                 }
 432                         }
 433                 } /* else { window.type != TYPE_OVERRIDE */
 434
 435                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 436                         window.window);
 437                 fflush(stderr);
 438
 439                 XMapWindow(display, window.window);
 440
 441         } else /* if (own_window) { */
 442 #endif
 443                 /* root / desktop window */
 444         {
 445                 XWindowAttributes attrs;
 446
 447                 if (!window.window) {
 448                         window.window = find_desktop_window(&window.root, &window.desktop);
 449                 }
 450
 451                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 452                         window.width = attrs.width;
 453                         window.height = attrs.height;
 454                 }
 455
 456                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 457         }
 458
 459         /* Drawable is same as window. This may be changed by double buffering. */
 460         window.drawable = window.window;
 461
 462 #ifdef HAVE_XDBE
 463         if (use_xdbe) {
 464                 int major, minor;
 465
 466                 if (!XdbeQueryExtension(display, &major, &minor)) {
 467                         use_xdbe = 0;
 468                 } else {
 469                         window.back_buffer = XdbeAllocateBackBufferName(display,
 470                                 window.window, XdbeBackground);
 471                         if (window.back_buffer != None) {
 472                                 window.drawable = window.back_buffer;
 473                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 474                         } else {
 475                                 use_xdbe = 0;
 476                         }
 477                 }
 478                 if (!use_xdbe) {
 479                         ERR("failed to set up double buffer");
 480                 }
 481         }
 482         if (!use_xdbe) {
 483                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 484         }
 485 #endif
 486         window.visual = DefaultVisual(display, DefaultScreen(display));
 487         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 488 #ifdef IMLIB2
 489         {
 490                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 491         }
 492 #endif /* IMLIB2 */
 493         XFlush(display);
 494
 495         /* set_transparent_background(window.window);
 496          * must be done after double buffer stuff? */
 497 #ifdef OWN_WINDOW
 498         /* if (own_window) {
 499                 set_transparent_background(window.window);
 500                 XClearWindow(display, window.window);
 501         } */
 502 #endif
 503
 504         XSelectInput(display, window.window, ExposureMask
 505 #ifdef OWN_WINDOW
 506                 | (own_window ? (StructureNotifyMask | PropertyChangeMask |
 507                 ButtonPressMask | ButtonReleaseMask) : 0)
 508 #endif
 509                 );
 510 }
 511
 512 static Window find_subwindow(Window win, int w, int h)
 513 {
 514         unsigned int i, j;
 515         Window troot, parent, *children;
 516         unsigned int n;
 517
 518         /* search subwindows with same size as display or work area */
 519
 520         for (i = 0; i < 10; i++) {
 521                 XQueryTree(display, win, &troot, &parent, &children, &n);
 522
 523                 for (j = 0; j < n; j++) {
 524                         XWindowAttributes attrs;
 525
 526                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 527                                 /* Window must be mapped and same size as display or
 528                                  * work space */
 529                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 530                                                 && attrs.height == display_height)
 531                                                 || (attrs.width == w && attrs.height == h))) {
 532                                         win = children[j];
 533                                         break;
 534                                 }
 535                         }
 536                 }
 537
 538                 XFree(children);
 539                 if (j == n) {
 540                         break;
 541                 }
 542         }
 543
 544         return win;
 545 }
 546
 547 long get_x11_color(const char *name)
 548 {
 549         XColor color;
 550
 551         color.pixel = 0;
 552         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 553                 /* lets check if it's a hex colour with the # missing in front
 554                  * if yes, then do something about it */
 555                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 556
 557                 newname[0] = '#';
 558                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 559                 /* now lets try again */
 560                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 561                                 &color)) {
 562                         ERR("can't parse X color '%s'", name);
 563                         return 0xFF00FF;
 564                 }
 565         }
 566         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 567                 ERR("can't allocate X color '%s'", name);
 568         }
 569
 570         return (long) color.pixel;
 571 }
 572
 573 void create_gc(void)
 574 {
 575         XGCValues values;
 576
 577         values.graphics_exposures = 0;
 578         values.function = GXcopy;
 579         window.gc = XCreateGC(display, window.drawable,
 580                 GCFunction | GCGraphicsExposures, &values);
 581 }
 582
 583 void update_x11info(void)
 584 {
 585         struct information *current_info = &info;
 586         current_info->x11.monitor.number = XScreenCount(display);
 587         current_info->x11.monitor.current = XDefaultScreen(display);
 588 }
 589
 590 /* reserve window manager space */
 591 void set_struts(int sidenum)
 592 {
 593         Atom strut;
 594         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 595                 /* reserve space at left, right, top, bottom */
 596                 signed long sizes[12] = {0};
 597                 int i;
 598
 599                 /* define strut depth */
 600                 switch (sidenum) {
 601                         case 0:
 602                         {
 603                                 /* left side */
 604                                 sizes[0] = window.x + window.width;
 605                                 break;
 606                         }
 607                         case 1:
 608                         {
 609                                 /* right side */
 610                                 sizes[1] = display_width - window.x;
 611                                 break;
 612                         }
 613                         case 2:
 614                         {
 615                                 /* top side */
 616                                 sizes[2] = window.y + window.height;
 617                                 break;
 618                         }
 619                         case 3:
 620                         {
 621                                 /* bottom side */
 622                                 sizes[3] = display_height - window.y;
 623                                 break;
 624                         }
 625                 }
 626
 627                 /* define partial strut length */
 628                 if (sidenum <= 1) {
 629                         sizes[4 + (sidenum*2)] = window.y;
 630                         sizes[5 + (sidenum*2)] = window.y + window.height;
 631                 } else if (sidenum <= 3) {
 632                         sizes[4 + (sidenum*2)] = window.x;
 633                         sizes[5 + (sidenum*2)] = window.x + window.width;
 634                 }
 635
 636                 /* check constraints */
 637                 for (i = 0; i < 12; i++) {
 638                         if (sizes[i] < 0) {
 639                                 sizes[i] = 0;
 640                         } else {
 641                                 if (i <= 1 || i >= 8) {
 642                                         if (sizes[i] > display_width) {
 643                                                 sizes[i] = display_width;
 644                                         }
 645                                 } else {
 646                                         if (sizes[i] > display_height) {
 647                                                 sizes[i] = display_height;
 648                                         }
 649                                 }
 650                         }
 651                 }
 652
 653                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 654                                 PropModeReplace, (unsigned char *) &sizes, 4);
 655
 656                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 657                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 658                                         PropModeReplace, (unsigned char *) &sizes, 12);
 659                 }
 660         }
 661 }