dcompmgr.c

   1 #include "efence.h"
   2
   3 #include "screen.h"
   4 #include "window.h"
   5 #include "list.h"
   6 #include "display.h"
   7 #include "gettext.h"
   8 #include "time.h"
   9 #include "render.h"
  10
  11 #include <glib.h>
  12 #include <stdio.h>
  13 #include <sys/select.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <signal.h>
  17 #include <xcb/xcb.h>
  18 #include <xcb/damage.h>
  19 #include <xcb/shape.h>
  20
  21 typedef struct {
  22     int foo;
  23 } d_options_t;
  24
  25 static gboolean quit = FALSE;
  26
  27 static void
  28 read_options(int argc, char **argv, d_options_t *opts)
  29 {
  30     opts->foo = argc && argv;
  31 }
  32
  33 static void
  34 signal_quit_handler(int sig)
  35 {
  36     printf("caught signal %d, quitting\n", sig);
  37     quit = TRUE;
  38 }
  39
  40 static void
  41 event(d_display_t *dpy)
  42 {
  43     xcb_generic_event_t *ev;
  44
  45     while ((ev = xcb_poll_for_event(dpy->conn)) && !quit) {
  46         //printf("event %d\n", ev->response_type);
  47
  48         if (!ev->response_type) {
  49             display_error(dpy, (xcb_generic_error_t*)ev);
  50             free(ev);
  51             continue;
  52         }
  53
  54         switch (ev->response_type) {
  55         case XCB_CREATE_NOTIFY:
  56         {
  57             xcb_create_notify_event_t *cev;
  58             d_screen_t *sc;
  59             d_window_t *w;
  60
  61             cev = (xcb_create_notify_event_t*)ev;
  62             sc = display_screen_from_root(dpy, cev->parent);
  63             if (!sc) break;
  64             w = screen_add_window(sc, cev->window);
  65             break;
  66         }
  67         case XCB_DESTROY_NOTIFY:
  68         {
  69             xcb_destroy_notify_event_t *dev;
  70             d_screen_t *sc;
  71             d_window_t *w;
  72             gboolean vis;
  73
  74             dev = (xcb_destroy_notify_event_t*)ev;
  75             sc = display_screen_from_root(dpy, dev->event);
  76             if (!sc) break;
  77             w = screen_find_window(sc, dev->window);
  78             vis = window_is_mapped(w);
  79             if (vis)
  80                 sc->window_hide(w);
  81             screen_remove_window(sc, w);
  82             if (vis) screen_refresh(sc);
  83             break;
  84         }
  85         case XCB_REPARENT_NOTIFY:
  86         {
  87             xcb_reparent_notify_event_t *rev;
  88             d_screen_t *sc;
  89             d_window_t *w;
  90
  91             rev = (xcb_reparent_notify_event_t*)ev;
  92             sc = display_screen_from_root(dpy, rev->event);
  93             if (!sc) break;
  94             w = screen_find_window(sc, rev->window);
  95             if (rev->parent == sc->super.root)
  96                 screen_add_window(sc, rev->window);
  97             else {
  98                 if (window_is_mapped(w))
  99                     sc->window_hide(w);
 100                 screen_remove_window(sc, w);
 101             }
 102             screen_refresh(sc);
 103             break;
 104         }
 105         case XCB_MAP_NOTIFY:
 106         {
 107             xcb_map_notify_event_t *mev;
 108             d_screen_t *sc;
 109             d_window_t *w;
 110
 111             mev = (xcb_map_notify_event_t*)ev;
 112             sc = display_screen_from_root(dpy, mev->event);
 113             if (!sc) break;
 114             w = screen_find_window(sc, mev->window);
 115             sc->window_show(w);
 116             screen_refresh(w->sc);
 117             break;
 118         }
 119         case XCB_UNMAP_NOTIFY:
 120         {
 121             xcb_unmap_notify_event_t *mev;
 122             d_screen_t *sc;
 123             d_window_t *w;
 124
 125             mev = (xcb_unmap_notify_event_t*)ev;
 126             sc = display_screen_from_root(dpy, mev->event);
 127             if (!sc) break;
 128             w = screen_find_window(sc, mev->window);
 129             sc->window_hide(w);
 130             screen_refresh(w->sc);
 131             break;
 132         }
 133         case XCB_CIRCULATE_NOTIFY:
 134         {
 135             xcb_circulate_notify_event_t *cev;
 136             d_screen_t *sc;
 137             d_window_t *w;
 138
 139             cev = (xcb_circulate_notify_event_t*)ev;
 140             sc = display_screen_from_root(dpy, cev->event);
 141             if (!sc) break;
 142             w = screen_find_window(sc, cev->window);
 143             if (cev->place == XCB_PLACE_ON_TOP)
 144                 screen_stacking_move_to_top(sc, w);
 145             else
 146                 screen_stacking_move_to_bottom(sc, w);
 147             screen_refresh(w->sc);
 148         }
 149         case XCB_CONFIGURE_NOTIFY:
 150         {
 151             xcb_configure_notify_event_t *cev;
 152             d_screen_t *sc;
 153             d_window_t *w, *above;
 154             int x, y, width, height, bwidth;
 155
 156             cev = (xcb_configure_notify_event_t*)ev;
 157             sc = display_screen_from_root(dpy, cev->event);
 158             if (!sc) break;
 159             //printf("configure 0x%x", cev->window);
 160             w = screen_find_window(sc, cev->window);
 161             window_get_area(w, &x, &y, &width, &height, &bwidth);
 162             if (x != cev->x || y != cev->y || width != cev->width ||
 163                 height != cev->height || bwidth != cev->border_width)
 164             {
 165                 window_configure(w, cev->x, cev->y,
 166                                  cev->width, cev->height,
 167                                  cev->border_width);
 168                 if (window_is_mapped(w)) {
 169                     if (x != cev->x || y != cev->y)
 170                         sc->window_move(w);
 171                     if (width != cev->width ||
 172                         height != cev->height || bwidth != cev->border_width)
 173                         sc->window_resize(w);
 174                 }
 175             }
 176             above = screen_find_window(sc, cev->above_sibling);
 177             screen_stacking_move_above(sc, w, above);
 178             screen_refresh(w->sc);
 179             break;
 180         }
 181         case XCB_PROPERTY_NOTIFY:
 182         {
 183             xcb_property_notify_event_t *pev;
 184             d_screen_t *sc;
 185
 186             pev = (xcb_property_notify_event_t*)ev;
 187             sc = display_screen_from_root(dpy, pev->window);
 188             if (!sc) break;
 189             if (pev->atom == dpy->a.xrootpmap_id ||
 190                 pev->atom == dpy->a.esetroot_pmap_id ||
 191                 pev->atom == dpy->a.xsetroot_id)
 192             {
 193                 sc->screen_root_pixmap_changed(sc);
 194             }
 195             break;
 196         }
 197         default:
 198             if (ev->response_type - dpy->damage.event == XCB_DAMAGE_NOTIFY) {
 199                 xcb_damage_notify_event_t *dev;
 200                 d_list_it_t *it;
 201
 202                 dev = (xcb_damage_notify_event_t*)ev;
 203                 for (it = list_top(dpy->screens); it; it = it->next) {
 204                     d_screen_t *sc = it->data;
 205                     d_window_t *w;
 206
 207                     w = screen_find_window(sc, dev->drawable);
 208                     if (w) {
 209                         screen_refresh(w->sc);
 210                         break;
 211                     }
 212                 }
 213                 xcb_damage_subtract(dpy->conn, dev->damage,
 214                                     XCB_NONE, XCB_NONE);
 215             }
 216             else if (dpy->shape.present &&
 217                      ev->response_type - dpy->shape.event == XCB_SHAPE_NOTIFY)
 218             {
 219                 xcb_shape_notify_event_t *sev;
 220                 d_list_it_t *it;
 221
 222                 sev = (xcb_shape_notify_event_t*)ev;
 223                 for (it = list_top(dpy->screens); it; it = it->next) {
 224                     d_screen_t *sc = it->data;
 225                     d_window_t *w;
 226
 227                     w = screen_find_window(sc, sev->affected_window);
 228                     if (w) {
 229                         sc->window_reshape(w);
 230                         screen_refresh(w->sc);
 231                         break;
 232                     }
 233                 }
 234             }
 235             break;
 236         }
 237         free(ev);
 238         xcb_flush(dpy->conn);
 239     }
 240 }
 241
 242 static void
 243 paint(d_display_t *dpy)
 244 {
 245     d_list_it_t *it;
 246     struct timeval now;
 247
 248     gettimeofday(&now, NULL);
 249
 250     for (it = list_top(dpy->screens); it; it = it->next) {
 251         d_screen_t *sc = it->data;
 252
 253         if (time_compare(&sc->next_repaint, &now) <= 0)
 254             sc->screen_paint(sc);
 255     }
 256 }
 257
 258 static void
 259 run(d_display_t *dpy)
 260 {
 261     while (!quit) {
 262         struct timeval next, now, *wait;
 263         int            r, npaint;
 264         d_list_it_t   *it;
 265         fd_set         fds;
 266
 267         event(dpy);
 268
 269         npaint = 0;
 270         for (it = list_top(dpy->screens); it; it = it->next) {
 271             d_screen_t *sc = it->data;
 272             if (sc->need_repaint &&
 273                 (!npaint || time_compare(&sc->next_repaint, &next) < 0))
 274             {
 275                 next = sc->next_repaint;
 276                 ++npaint;
 277             }
 278         }
 279
 280         gettimeofday(&now, 0);
 281
 282         if (!npaint)
 283             /* wait forever, there is nothing that needs drawing */
 284             wait = NULL;
 285         else if (time_compare(&next, &now) > 0) {
 286             /* wait until the next allowed redraw time */
 287             time_difference(&next, &now, &next);
 288             wait = &next;
 289         }
 290         else {
 291             /* don't wait cuz a redraw is due now already */
 292             next.tv_sec = 0;
 293             next.tv_usec = 100;
 294             wait = &next;
 295         }
 296
 297         FD_ZERO(&fds);
 298         FD_SET(dpy->fd, &fds);
 299
 300         //printf("select %d\n", npaint);
 301
 302         r = select(dpy->fd+1, &fds, NULL, NULL, wait);
 303         if (r == 0) {
 304             //printf("select timeout\n");
 305             paint(dpy);
 306             xcb_flush(dpy->conn);
 307         }
 308
 309         if (xcb_connection_has_error(dpy->conn))
 310             quit = TRUE;
 311     }
 312 }
 313
 314 static void
 315 setup_functions(d_display_t *dpy)
 316 {
 317     d_list_it_t *it;
 318
 319     for (it = list_top(dpy->screens); it; it = it->next) {
 320         d_screen_t *sc = it->data;
 321         int id;
 322         screen_setup_default_functions(sc);
 323
 324         /* these can be plugins.. */
 325         id = 1;
 326         render_init(sc, id++);
 327     }
 328 }
 329
 330 static void
 331 cleanup_functions(d_display_t *dpy)
 332 {
 333     d_list_it_t *it;
 334
 335     for (it = list_top(dpy->screens); it; it = it->next) {
 336         d_screen_t *sc = it->data;
 337
 338         /* these can be plugins.. */
 339         render_free(sc);
 340     }
 341 }
 342
 343 int
 344 main(int argc, char **argv)
 345 {
 346     d_display_t         *dpy;
 347     d_options_t          opts;
 348
 349     read_options(argc, argv, &opts);
 350
 351     dpy = display_open(NULL);
 352     if (!dpy) {
 353         printf(_("Unable to connect to display\n"));
 354         return 1;
 355     }
 356
 357     if (!dpy->composite.present) {
 358         printf(_("no composite extension present on the display\n"));
 359         display_unref(dpy);
 360         return 1;
 361     }
 362     if (!dpy->xfixes.present) {
 363         printf(_("no xfixes extension present on the display\n"));
 364         display_unref(dpy);
 365         return 1;
 366     }
 367     if (!dpy->damage.present) {
 368         printf(_("no damage extension present on the display\n"));
 369         display_unref(dpy);
 370         return 1;
 371     }
 372     if (!dpy->render.present) {
 373         printf(_("no render extension present on the display\n"));
 374         display_unref(dpy);
 375         return 1;
 376     }
 377     if (dpy->composite.major_version <= 0 && dpy->composite.minor_version < 3)
 378     {
 379         printf(_("composite extension does not support the overlay window"));
 380         display_unref(dpy);
 381         return 1;
 382     }
 383
 384     if (!display_claim_screens(dpy)) {
 385         printf(_("found no screens to run on\n"));
 386         display_unref(dpy);
 387         return 0;
 388     }
 389
 390     signal(SIGINT, signal_quit_handler);
 391     signal(SIGHUP, signal_quit_handler);
 392     signal(SIGTERM, signal_quit_handler);
 393     signal(SIGQUIT, signal_quit_handler);
 394
 395     setup_functions(dpy);
 396
 397     {
 398         /* some of the windows may already be visible */
 399         d_list_it_t *sc_it;
 400
 401         for (sc_it = list_top(dpy->screens); sc_it; sc_it = sc_it->next) {
 402             d_screen_t *sc = sc_it->data;
 403             d_list_it_t *it;
 404             for (it = list_bottom(sc->stacking); it; it = it->prev)
 405                 if (window_is_attr_mapped(it->data))
 406                     sc->window_show(it->data);
 407         }
 408     }
 409
 410     run(dpy);
 411
 412     {
 413         /* make everything hidden */
 414         d_list_it_t *sc_it;
 415
 416         for (sc_it = list_top(dpy->screens); sc_it; sc_it = sc_it->next) {
 417             d_screen_t *sc = sc_it->data;
 418             d_list_it_t *it;
 419             for (it = list_top(sc->stacking); it; it = it->next) {
 420                 if (window_is_mapped(it->data))
 421                     sc->window_hide(it->data);
 422             }
 423         }
 424     }
 425
 426     cleanup_functions(dpy);
 427
 428     display_unref(dpy);
 429     return 0;
 430 }