bspwm.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include <signal.h>
   6 #include <fcntl.h>
   7 #include <sys/socket.h>
   8 #include <sys/un.h>
   9 #include <sys/select.h>
  10 #include <sys/stat.h>
  11 #include <sys/wait.h>
  12 #include <xcb/xcb.h>
  13 #include <xcb/xcb_event.h>
  14 #include <xcb/xcb_ewmh.h>
  15 #include <xcb/randr.h>
  16 #include "types.h"
  17 #include "settings.h"
  18 #include "messages.h"
  19 #include "rules.h"
  20 #include "events.h"
  21 #include "common.h"
  22 #include "helpers.h"
  23 #include "window.h"
  24 #include "bspwm.h"
  25 #include "tree.h"
  26 #include "ewmh.h"
  27
  28 void quit(void)
  29 {
  30     running = false;
  31 }
  32
  33 void cleanup(void)
  34 {
  35     while (mon_head != NULL)
  36         remove_monitor(mon_head);
  37     while (rule_head != NULL)
  38         remove_rule(rule_head);
  39     free(frozen_pointer);
  40 }
  41
  42 void register_events(void)
  43 {
  44     uint32_t values[] = {ROOT_EVENT_MASK};
  45     xcb_generic_error_t *e = xcb_request_check(dpy, xcb_change_window_attributes_checked(dpy, root, XCB_CW_EVENT_MASK, values));
  46     if (e != NULL) {
  47         xcb_disconnect(dpy);
  48         err("Another window manager is already running.\n");
  49     }
  50 }
  51
  52 bool import_monitors(void)
  53 {
  54     PUTS("import monitors");
  55     xcb_randr_get_screen_resources_current_reply_t *sres = xcb_randr_get_screen_resources_current_reply(dpy, xcb_randr_get_screen_resources_current(dpy, root), NULL);
  56     if (sres == NULL)
  57         return false;
  58
  59     int len = xcb_randr_get_screen_resources_current_outputs_length(sres);
  60     xcb_randr_output_t *outputs = xcb_randr_get_screen_resources_current_outputs(sres);
  61
  62     xcb_randr_get_output_info_cookie_t cookies[len];
  63     for (int i = 0; i < len; i++)
  64         cookies[i] = xcb_randr_get_output_info(dpy, outputs[i], XCB_CURRENT_TIME);
  65
  66     for (monitor_t *m = mon_head; m != NULL; m = m->next)
  67         m->wired = false;
  68
  69     monitor_t *mm = NULL;
  70     unsigned int num = 0;
  71
  72     for (int i = 0; i < len; i++) {
  73         xcb_randr_get_output_info_reply_t *info = xcb_randr_get_output_info_reply(dpy, cookies[i], NULL);
  74         if (info != NULL && info->crtc != XCB_NONE) {
  75
  76             xcb_randr_get_crtc_info_reply_t *cir = xcb_randr_get_crtc_info_reply(dpy, xcb_randr_get_crtc_info(dpy, info->crtc, XCB_CURRENT_TIME), NULL);
  77             if (cir != NULL) {
  78                 xcb_rectangle_t rect = (xcb_rectangle_t) {cir->x, cir->y, cir->width, cir->height};
  79                 mm = get_monitor_by_id(outputs[i]);
  80                 if (mm != NULL) {
  81                     mm->rectangle = rect;
  82                     arrange(mm, mm->desk);
  83                     mm->wired = true;
  84                     PRINTF("update monitor %s (0x%X)\n", mm->name, mm->id);
  85                 } else {
  86                     mm = add_monitor(&rect);
  87                     char *name = (char *)xcb_randr_get_output_info_name(info);
  88                     size_t name_len = MIN(sizeof(mm->name), (size_t)xcb_randr_get_output_info_name_length(info));
  89                     strncpy(mm->name, name, name_len);
  90                     mm->name[name_len] = '\0';
  91                     mm->id = outputs[i];
  92                     add_desktop(mm, NULL);
  93                     PRINTF("add monitor %s (0x%X)\n", mm->name, mm->id);
  94                 }
  95                 num++;
  96             }
  97             free(cir);
  98         }
  99         free(info);
 100     }
 101
 102     monitor_t *m = mon_head;
 103     while (m != NULL) {
 104         monitor_t *next = m->next;
 105         if (!m->wired) {
 106             PRINTF("remove monitor %s (0x%X)\n", m->name, m->id);
 107             transfer_desktops(mm, m);
 108         }
 109         m = next;
 110     }
 111
 112     free(sres);
 113     put_status();
 114     return (num_monitors > 0);
 115 }
 116
 117 void init(void)
 118 {
 119     num_monitors = num_desktops = num_clients = 0;
 120     monitor_uid = desktop_uid = client_uid = rule_uid = 0;
 121     mon = last_mon = mon_head = mon_tail = NULL;
 122     rule_head = rule_tail = NULL;
 123     randr_base = 0;
 124     split_mode = MODE_AUTOMATIC;
 125     visible = true;
 126     exit_status = 0;
 127 }
 128
 129 void setup(void)
 130 {
 131     init();
 132     ewmh_init();
 133     screen = xcb_setup_roots_iterator(xcb_get_setup(dpy)).data;
 134     if (screen == NULL)
 135         err("Can't acquire the default screen.\n");
 136     root = screen->root;
 137     register_events();
 138
 139     screen_width = screen->width_in_pixels;
 140     screen_height = screen->height_in_pixels;
 141     root_depth = screen->root_depth;
 142
 143     uint32_t mask = XCB_CW_EVENT_MASK;
 144     uint32_t values[] = {XCB_EVENT_MASK_POINTER_MOTION};
 145     motion_recorder = xcb_generate_id(dpy);
 146     xcb_create_window(dpy, XCB_COPY_FROM_PARENT, motion_recorder, root, 0, 0, screen_width, screen_height, 0, XCB_WINDOW_CLASS_INPUT_ONLY, XCB_COPY_FROM_PARENT, mask, values);
 147
 148     xcb_atom_t net_atoms[] = {ewmh->_NET_SUPPORTED,
 149                               ewmh->_NET_DESKTOP_NAMES,
 150                               ewmh->_NET_NUMBER_OF_DESKTOPS,
 151                               ewmh->_NET_CURRENT_DESKTOP,
 152                               ewmh->_NET_CLIENT_LIST,
 153                               ewmh->_NET_ACTIVE_WINDOW,
 154                               ewmh->_NET_WM_DESKTOP,
 155                               ewmh->_NET_WM_STATE,
 156                               ewmh->_NET_WM_STATE_FULLSCREEN,
 157                               ewmh->_NET_WM_STATE_DEMANDS_ATTENTION,
 158                               ewmh->_NET_WM_WINDOW_TYPE,
 159                               ewmh->_NET_WM_WINDOW_TYPE_DOCK,
 160                               ewmh->_NET_WM_WINDOW_TYPE_NOTIFICATION,
 161                               ewmh->_NET_WM_WINDOW_TYPE_DIALOG,
 162                               ewmh->_NET_WM_WINDOW_TYPE_UTILITY,
 163                               ewmh->_NET_WM_WINDOW_TYPE_TOOLBAR};
 164
 165     xcb_ewmh_set_supported(ewmh, default_screen, LENGTH(net_atoms), net_atoms);
 166
 167     xcb_intern_atom_reply_t *iar = xcb_intern_atom_reply(dpy, xcb_intern_atom(dpy, 0, strlen("_COMPTON_SHADOW"), "_COMPTON_SHADOW"), NULL);
 168
 169     if (iar != NULL) {
 170         compton_shadow = iar->atom;
 171         free(iar);
 172     }
 173
 174     const xcb_query_extension_reply_t *qep = xcb_get_extension_data(dpy, &xcb_randr_id);
 175     if (qep->present && import_monitors()) {
 176         randr_base = qep->first_event;
 177         xcb_randr_select_input(dpy, root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
 178     } else {
 179         warn("Couldn't retrieve monitors via RandR.\n");
 180         xcb_rectangle_t rect = (xcb_rectangle_t) {0, 0, screen_width, screen_height};
 181         monitor_t *m = add_monitor(&rect);
 182         add_desktop(m, NULL);
 183     }
 184
 185     ewmh_update_number_of_desktops();
 186     ewmh_update_desktop_names();
 187     ewmh_update_current_desktop();
 188     frozen_pointer = make_pointer_state();
 189 }
 190
 191 int main(int argc, char *argv[])
 192 {
 193     fd_set descriptors;
 194     char socket_path[MAXLEN];
 195     char *fifo_path = NULL;
 196     status_prefix = NULL;
 197     int sock_fd, ret_fd, dpy_fd, sel, n;
 198     struct sockaddr_un sock_address;
 199     size_t rsplen = 0;
 200     char msg[BUFSIZ] = {0};
 201     char rsp[BUFSIZ] = {0};
 202     xcb_generic_event_t *event;
 203     char opt;
 204
 205     while ((opt = getopt(argc, argv, "hvs:p:")) != -1) {
 206         switch (opt) {
 207             case 'h':
 208                 printf("bspwm [-h|-v|-s PANEL_FIFO|-p PANEL_PREFIX]\n");
 209                 exit(EXIT_SUCCESS);
 210                 break;
 211             case 'v':
 212                 printf("%s\n", VERSION);
 213                 exit(EXIT_SUCCESS);
 214                 break;
 215             case 's':
 216                 fifo_path = optarg;
 217                 break;
 218             case 'p':
 219                 status_prefix = optarg;
 220                 break;
 221         }
 222     }
 223
 224     running = true;
 225     dpy = xcb_connect(NULL, &default_screen);
 226
 227     if (xcb_connection_has_error(dpy))
 228         err("Can't open the default display.\n");
 229
 230     setup();
 231
 232     dpy_fd = xcb_get_file_descriptor(dpy);
 233
 234     char *sp = getenv(SOCKET_ENV_VAR);
 235     strncpy(socket_path, (sp == NULL ? DEFAULT_SOCKET_PATH : sp), sizeof(socket_path));
 236
 237     sock_address.sun_family = AF_UNIX;
 238     strncpy(sock_address.sun_path, socket_path, sizeof(sock_address.sun_path));
 239     unlink(socket_path);
 240
 241     sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
 242
 243     if (sock_fd == -1)
 244         err("Couldn't create the socket.\n");
 245
 246     if (bind(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1)
 247         err("Couldn't bind a name to the socket.\n");
 248
 249     if (listen(sock_fd, SOMAXCONN) == -1)
 250         err("Couldn't listen to the socket.\n");
 251
 252     sel = MAX(sock_fd, dpy_fd) + 1;
 253
 254     if (fifo_path != NULL) {
 255         int fifo_fd = open(fifo_path, O_RDWR | O_NONBLOCK);
 256         if (fifo_fd != -1)
 257             status_fifo = fdopen(fifo_fd, "w");
 258         else
 259             warn("Couldn't open status fifo.\n");
 260     }
 261
 262     load_settings();
 263     run_autostart();
 264     ewmh_update_wm_name();
 265
 266     while (running) {
 267
 268         xcb_flush(dpy);
 269
 270         FD_ZERO(&descriptors);
 271         FD_SET(sock_fd, &descriptors);
 272         FD_SET(dpy_fd, &descriptors);
 273
 274         if (select(sel, &descriptors, NULL, NULL, NULL) > 0) {
 275
 276             if (FD_ISSET(sock_fd, &descriptors)) {
 277                 ret_fd = accept(sock_fd, NULL, 0);
 278                 if (ret_fd > 0 && (n = recv(ret_fd, msg, sizeof(msg), 0)) > 0) {
 279                     msg[n] = '\0';
 280                     process_message(msg, rsp);
 281                     rsplen = strlen(rsp);
 282                     if (rsp[rsplen - 1] == '\n')
 283                         rsp[--rsplen] = '\0';
 284                     send(ret_fd, rsp, rsplen, 0);
 285                     close(ret_fd);
 286                     rsp[0] = '\0';
 287                 }
 288             }
 289
 290             if (FD_ISSET(dpy_fd, &descriptors)) {
 291                 while ((event = xcb_poll_for_event(dpy)) != NULL) {
 292                     handle_event(event);
 293                     free(event);
 294                 }
 295             }
 296
 297         }
 298
 299         if (xcb_connection_has_error(dpy))
 300             err("The server has closed the connection.\n");
 301     }
 302
 303     cleanup();
 304     close(sock_fd);
 305     if (status_fifo != NULL)
 306         fclose(status_fifo);
 307     xcb_ewmh_connection_wipe(ewmh);
 308     xcb_destroy_window(dpy, motion_recorder);
 309     free(ewmh);
 310     xcb_flush(dpy);
 311     xcb_disconnect(dpy);
 312     return exit_status;
 313 }