git.sur5r.net Git - i3/i3/blob - src/config.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <sys/stat.h>
  14 #include <stdlib.h>
  15 #include <glob.h>
  16
  17 /* We need Xlib for XStringToKeysym */
  18 #include <X11/Xlib.h>
  19
  20 #include <xcb/xcb_keysyms.h>
  21
  22 #include "i3.h"
  23 #include "util.h"
  24 #include "config.h"
  25 #include "xcb.h"
  26 #include "table.h"
  27 #include "workspace.h"
  28
  29 Config config;
  30
  31 /*
  32  * This function resolves ~ in pathnames.
  33  *
  34  */
  35 static char *glob_path(const char *path) {
  36         static glob_t globbuf;
  37         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
  38                 die("glob() failed");
  39         char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
  40         globfree(&globbuf);
  41         return result;
  42 }
  43
  44 /*
  45  * This function does a very simple replacement of each instance of key with value.
  46  *
  47  */
  48 static void replace_variable(char *buffer, const char *key, const char *value) {
  49         char *pos;
  50         /* To prevent endless recursions when the user makes an error configuring,
  51          * we stop after 100 replacements. That should be vastly more than enough. */
  52         int c = 0;
  53         while ((pos = strcasestr(buffer, key)) != NULL && c++ < 100) {
  54                 char *rest = pos + strlen(key);
  55                 *pos = '\0';
  56                 char *replaced;
  57                 asprintf(&replaced, "%s%s%s", buffer, value, rest);
  58                 /* Hm, this is a bit ugly, but sizeof(buffer) = 4, as it’s just a pointer.
  59                  * So we need to hard-code the dimensions here. */
  60                 strncpy(buffer, replaced, 1026);
  61                 free(replaced);
  62         }
  63 }
  64
  65 /**
  66  * Ungrabs all keys, to be called before re-grabbing the keys because of a
  67  * mapping_notify event or a configuration file reload
  68  *
  69  */
  70 void ungrab_all_keys(xcb_connection_t *conn) {
  71         LOG("Ungrabbing all keys\n");
  72         xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY);
  73 }
  74
  75 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) {
  76         LOG("Grabbing %d\n", keycode);
  77         if ((bind->mods & BIND_MODE_SWITCH) != 0)
  78                 xcb_grab_key(conn, 0, root, 0, keycode,
  79                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_SYNC);
  80         else {
  81                 /* Grab the key in all combinations */
  82                 #define GRAB_KEY(modifier) xcb_grab_key(conn, 0, root, modifier, keycode, \
  83                                                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC)
  84                 GRAB_KEY(bind->mods);
  85                 GRAB_KEY(bind->mods | xcb_numlock_mask);
  86                 GRAB_KEY(bind->mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK);
  87         }
  88 }
  89
  90 /*
  91  * Grab the bound keys (tell X to send us keypress events for those keycodes)
  92  *
  93  */
  94 void grab_all_keys(xcb_connection_t *conn) {
  95         Binding *bind;
  96         TAILQ_FOREACH(bind, &bindings, bindings) {
  97                 /* The easy case: the user specified a keycode directly. */
  98                 if (bind->keycode > 0) {
  99                         grab_keycode_for_binding(conn, bind, bind->keycode);
 100                         continue;
 101                 }
 102
 103                 /* We need to translate the symbol to a keycode */
 104                 xcb_keysym_t keysym = XStringToKeysym(bind->symbol);
 105                 if (keysym == NoSymbol) {
 106                         LOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol);
 107                         continue;
 108                 }
 109
 110                 xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym);
 111                 if (keycodes == NULL) {
 112                         LOG("Could not translate symbol \"%s\"\n", bind->symbol);
 113                         continue;
 114                 }
 115
 116                 uint32_t last_keycode = 0;
 117                 bind->number_keycodes = 0;
 118                 for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) {
 119                         /* We hope duplicate keycodes will be returned in order
 120                          * and skip them */
 121                         if (last_keycode == *walk)
 122                                 continue;
 123                         grab_keycode_for_binding(conn, bind, *walk);
 124                         last_keycode = *walk;
 125                         bind->number_keycodes++;
 126                 }
 127                 LOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes);
 128                 bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t));
 129                 memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t));
 130                 free(keycodes);
 131         }
 132 }
 133
 134 /*
 135  * Reads the configuration from ~/.i3/config or /etc/i3/config if not found.
 136  *
 137  * If you specify override_configpath, only this path is used to look for a
 138  * configuration file.
 139  *
 140  */
 141 void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) {
 142         if (reload) {
 143                 /* First ungrab the keys */
 144                 ungrab_all_keys(conn);
 145
 146                 /* Clear the old binding and assignment lists */
 147                 Binding *bind;
 148                 while (!TAILQ_EMPTY(&bindings)) {
 149                         bind = TAILQ_FIRST(&bindings);
 150                         TAILQ_REMOVE(&bindings, bind, bindings);
 151                         FREE(bind->command);
 152                         FREE(bind);
 153                 }
 154
 155                 struct Assignment *assign;
 156                 while (!TAILQ_EMPTY(&assignments)) {
 157                         assign = TAILQ_FIRST(&assignments);
 158                         FREE(assign->windowclass_title);
 159                         TAILQ_REMOVE(&assignments, assign, assignments);
 160                         FREE(assign);
 161                 }
 162         }
 163
 164         SLIST_HEAD(variables_head, Variable) variables;
 165
 166 #define OPTION_STRING(name) \
 167         if (strcasecmp(key, #name) == 0) { \
 168                 config.name = sstrdup(value); \
 169                 continue; \
 170         }
 171
 172 #define REQUIRED_OPTION(name) \
 173         if (config.name == NULL) \
 174                 die("You did not specify required configuration option " #name "\n");
 175
 176 #define OPTION_COLORTRIPLE(opt, name) \
 177         if (strcasecmp(key, opt) == 0) { \
 178                 char border[8], background[8], text[8]; \
 179                 memset(border, 0, sizeof(border)); \
 180                 memset(background, 0, sizeof(background)); \
 181                 memset(text, 0, sizeof(text)); \
 182                 border[0] = background[0] = text[0] = '#'; \
 183                 if (sscanf(value, "#%06[0-9a-fA-F] #%06[0-9a-fA-F] #%06[0-9a-fA-F]", \
 184                     border + 1, background + 1, text + 1) != 3 || \
 185                     strlen(border) != 7 || \
 186                     strlen(background) != 7 || \
 187                     strlen(text) != 7) \
 188                         die("invalid color code line: %s\n", value); \
 189                 config.name.border = get_colorpixel(conn, border); \
 190                 config.name.background = get_colorpixel(conn, background); \
 191                 config.name.text = get_colorpixel(conn, text); \
 192                 continue; \
 193         }
 194
 195         /* Clear the old config or initialize the data structure */
 196         memset(&config, 0, sizeof(config));
 197
 198         SLIST_INIT(&variables);
 199
 200         /* Initialize default colors */
 201         config.client.focused.border = get_colorpixel(conn, "#4c7899");
 202         config.client.focused.background = get_colorpixel(conn, "#285577");
 203         config.client.focused.text = get_colorpixel(conn, "#ffffff");
 204
 205         config.client.focused_inactive.border = get_colorpixel(conn, "#4c7899");
 206         config.client.focused_inactive.background = get_colorpixel(conn, "#555555");
 207         config.client.focused_inactive.text = get_colorpixel(conn, "#ffffff");
 208
 209         config.client.unfocused.border = get_colorpixel(conn, "#333333");
 210         config.client.unfocused.background = get_colorpixel(conn, "#222222");
 211         config.client.unfocused.text = get_colorpixel(conn, "#888888");
 212
 213         config.client.urgent.border = get_colorpixel(conn, "#2f343a");
 214         config.client.urgent.background = get_colorpixel(conn, "#900000");
 215         config.client.urgent.text = get_colorpixel(conn, "#ffffff");
 216
 217         config.bar.focused.border = get_colorpixel(conn, "#4c7899");
 218         config.bar.focused.background = get_colorpixel(conn, "#285577");
 219         config.bar.focused.text = get_colorpixel(conn, "#ffffff");
 220
 221         config.bar.unfocused.border = get_colorpixel(conn, "#333333");
 222         config.bar.unfocused.background = get_colorpixel(conn, "#222222");
 223         config.bar.unfocused.text = get_colorpixel(conn, "#888888");
 224
 225         config.bar.urgent.border = get_colorpixel(conn, "#2f343a");
 226         config.bar.urgent.background = get_colorpixel(conn, "#900000");
 227         config.bar.urgent.text = get_colorpixel(conn, "#ffffff");
 228
 229         FILE *handle;
 230         if (override_configpath != NULL) {
 231                 if ((handle = fopen(override_configpath, "r")) == NULL)
 232                         die("Could not open configfile \"%s\".\n", override_configpath);
 233         } else {
 234                 /* We first check for ~/.i3/config, then for /etc/i3/config */
 235                 char *globbed = glob_path("~/.i3/config");
 236                 if ((handle = fopen(globbed, "r")) == NULL)
 237                         if ((handle = fopen("/etc/i3/config", "r")) == NULL)
 238                                 die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 239                 free(globbed);
 240         }
 241         char key[512], value[512], buffer[1026];
 242
 243         while (!feof(handle)) {
 244                 if (fgets(buffer, 1024, handle) == NULL) {
 245                         /* fgets returns NULL on EOF and on error, so see which one it is. */
 246                         if (feof(handle))
 247                                 break;
 248                         die("Could not read configuration file\n");
 249                 }
 250
 251                 if (config.terminal != NULL)
 252                         replace_variable(buffer, "$terminal", config.terminal);
 253
 254                 /* Replace all custom variables */
 255                 struct Variable *current;
 256                 SLIST_FOREACH(current, &variables, variables)
 257                         replace_variable(buffer, current->key, current->value);
 258
 259                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
 260                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
 261                     key[0] == '#' || strlen(key) < 3)
 262                         continue;
 263
 264                 OPTION_STRING(terminal);
 265                 OPTION_STRING(font);
 266
 267                 /* Colors */
 268                 OPTION_COLORTRIPLE("client.focused", client.focused);
 269                 OPTION_COLORTRIPLE("client.focused_inactive", client.focused_inactive);
 270                 OPTION_COLORTRIPLE("client.unfocused", client.unfocused);
 271                 OPTION_COLORTRIPLE("client.urgent", client.urgent);
 272                 OPTION_COLORTRIPLE("bar.focused", bar.focused);
 273                 OPTION_COLORTRIPLE("bar.unfocused", bar.unfocused);
 274                 OPTION_COLORTRIPLE("bar.urgent", bar.urgent);
 275
 276                 /* exec-lines (autostart) */
 277                 if (strcasecmp(key, "exec") == 0) {
 278                         struct Autostart *new = smalloc(sizeof(struct Autostart));
 279                         new->command = sstrdup(value);
 280                         TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 281                         continue;
 282                 }
 283
 284                 /* key bindings */
 285                 if (strcasecmp(key, "bind") == 0 || strcasecmp(key, "bindsym") == 0) {
 286                         #define CHECK_MODIFIER(name) \
 287                                 if (strncasecmp(walk, #name, strlen(#name)) == 0) { \
 288                                         modifiers |= BIND_##name; \
 289                                         walk += strlen(#name) + 1; \
 290                                         continue; \
 291                                 }
 292                         char *walk = value, *rest;
 293                         uint32_t modifiers = 0;
 294
 295                         while (*walk != '\0') {
 296                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 297                                 CHECK_MODIFIER(SHIFT);
 298                                 CHECK_MODIFIER(CONTROL);
 299                                 CHECK_MODIFIER(MODE_SWITCH);
 300                                 CHECK_MODIFIER(MOD1);
 301                                 CHECK_MODIFIER(MOD2);
 302                                 CHECK_MODIFIER(MOD3);
 303                                 CHECK_MODIFIER(MOD4);
 304                                 CHECK_MODIFIER(MOD5);
 305
 306                                 /* No modifier found? Then we’re done with this step */
 307                                 break;
 308                         }
 309
 310                         Binding *new = scalloc(sizeof(Binding));
 311
 312                         /* Now check for the keycode or copy the symbol */
 313                         if (strcasecmp(key, "bind") == 0) {
 314                                 int keycode = strtol(walk, &rest, 10);
 315                                 if (!rest || *rest != ' ')
 316                                         die("Invalid binding (keycode)\n");
 317                                 new->keycode = keycode;
 318                         } else {
 319                                 rest = walk;
 320                                 char *sym = rest;
 321                                 while (*rest != '\0' && *rest != ' ')
 322                                         rest++;
 323                                 if (*rest != ' ')
 324                                         die("Invalid binding (keysym)\n");
 325 #if defined(__OpenBSD__)
 326                                 size_t len = strlen(sym);
 327                                 if (len > (rest - sym))
 328                                         len = (rest - sym);
 329                                 new->symbol = smalloc(len + 1);
 330                                 memcpy(new->symbol, sym, len+1);
 331                                 new->symbol[len]='\0';
 332 #else
 333                                 new->symbol = strndup(sym, (rest - sym));
 334 #endif
 335                         }
 336                         rest++;
 337                         LOG("keycode = %d, symbol = %s, modifiers = %d, command = *%s*\n", new->keycode, new->symbol, modifiers, rest);
 338                         new->mods = modifiers;
 339                         new->command = sstrdup(rest);
 340                         TAILQ_INSERT_TAIL(&bindings, new, bindings);
 341                         continue;
 342                 }
 343
 344                 if (strcasecmp(key, "floating_modifier") == 0) {
 345                         char *walk = value;
 346                         uint32_t modifiers = 0;
 347
 348                         while (*walk != '\0') {
 349                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 350                                 CHECK_MODIFIER(SHIFT);
 351                                 CHECK_MODIFIER(CONTROL);
 352                                 CHECK_MODIFIER(MODE_SWITCH);
 353                                 CHECK_MODIFIER(MOD1);
 354                                 CHECK_MODIFIER(MOD2);
 355                                 CHECK_MODIFIER(MOD3);
 356                                 CHECK_MODIFIER(MOD4);
 357                                 CHECK_MODIFIER(MOD5);
 358
 359                                 /* No modifier found? Then we’re done with this step */
 360                                 break;
 361                         }
 362
 363                         LOG("Floating modifiers = %d\n", modifiers);
 364                         config.floating_modifier = modifiers;
 365                         continue;
 366                 }
 367
 368                 /* workspace "workspace number" [screen <screen>] ["name of the workspace"]
 369                  * with screen := <number> | <position>, e.g. screen 1280 or screen 1 */
 370                 if (strcasecmp(key, "name") == 0 || strcasecmp(key, "workspace") == 0) {
 371                         LOG("workspace: %s\n",value);
 372                         char *ws_str = sstrdup(value);
 373                         char *end = strchr(ws_str, ' ');
 374                         if (end == NULL)
 375                                 die("Malformed name, couln't find terminating space\n");
 376                         *end = '\0';
 377
 378                         /* Strip trailing whitespace */
 379                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 380                                 value[strlen(value)-1] = '\0';
 381
 382                         int ws_num = atoi(ws_str);
 383
 384                         if (ws_num < 1 || ws_num > 10)
 385                                 die("Malformed name, invalid workspace number\n");
 386
 387                         /* find the name */
 388                         char *name = value;
 389                         name += strlen(ws_str) + 1;
 390
 391                         if (strncasecmp(name, "screen ", strlen("screen ")) == 0) {
 392                                 char *screen = strdup(name + strlen("screen "));
 393                                 if ((end = strchr(screen, ' ')) != NULL)
 394                                         *end = '\0';
 395                                 LOG("Setting preferred screen for workspace %d to \"%s\"\n", ws_num, screen);
 396                                 workspaces[ws_num - 1].preferred_screen = screen;
 397
 398                                 name += strlen("screen ") + strlen(screen);
 399                         }
 400
 401                         /* Strip leading whitespace */
 402                         while (*name != '\0' && *name == ' ')
 403                                 name++;
 404
 405                         LOG("rest to parse = %s\n", name);
 406
 407                         if (name == '\0') {
 408                                 free(ws_str);
 409                                 continue;
 410                         }
 411
 412                         LOG("setting name to \"%s\"\n", name);
 413
 414                         if (*name != '\0')
 415                                 workspace_set_name(&(workspaces[ws_num - 1]), name);
 416                         free(ws_str);
 417                         continue;
 418                 }
 419
 420                 /* assign window class[/window title] → workspace */
 421                 if (strcasecmp(key, "assign") == 0) {
 422                         LOG("assign: \"%s\"\n", value);
 423                         char *class_title;
 424                         char *target;
 425                         char *end;
 426
 427                         /* If the window class/title is quoted we skip quotes */
 428                         if (value[0] == '"') {
 429                                 class_title = sstrdup(value+1);
 430                                 end = strchr(class_title, '"');
 431                         } else {
 432                                 class_title = sstrdup(value);
 433                                 /* If it is not quoted, we terminate it at the first space */
 434                                 end = strchr(class_title, ' ');
 435                         }
 436                         if (end == NULL)
 437                                 die("Malformed assignment, couldn't find terminating quote\n");
 438                         *end = '\0';
 439
 440                         /* Strip trailing whitespace */
 441                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 442                                 value[strlen(value)-1] = '\0';
 443
 444                         /* The target is the last argument separated by a space */
 445                         if ((target = strrchr(value, ' ')) == NULL)
 446                                 die("Malformed assignment, couldn't find target (\"%s\")\n", value);
 447                         target++;
 448
 449                         if (strchr(target, '~') == NULL && (atoi(target) < 1 || atoi(target) > 10))
 450                                 die("Malformed assignment, invalid workspace number\n");
 451
 452                         LOG("assignment parsed: \"%s\" to \"%s\"\n", class_title, target);
 453
 454                         struct Assignment *new = scalloc(sizeof(struct Assignment));
 455                         new->windowclass_title = class_title;
 456                         if (strchr(target, '~') != NULL)
 457                                 new->floating = ASSIGN_FLOATING_ONLY;
 458
 459                         while (*target == '~')
 460                                 target++;
 461
 462                         if (atoi(target) >= 1 && atoi(target) <= 10) {
 463                                 if (new->floating == ASSIGN_FLOATING_ONLY)
 464                                         new->floating = ASSIGN_FLOATING;
 465                                 new->workspace = atoi(target);
 466                         }
 467                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 468
 469                         LOG("Assignment loaded: \"%s\":\n", class_title);
 470                         if (new->floating != ASSIGN_FLOATING_ONLY)
 471                                 LOG(" to workspace %d\n", new->workspace);
 472
 473                         if (new->floating != ASSIGN_FLOATING_NO)
 474                                 LOG(" will be floating\n");
 475
 476                         continue;
 477                 }
 478
 479                 /* set a custom variable */
 480                 if (strcasecmp(key, "set") == 0) {
 481                         if (value[0] != '$')
 482                                 die("Malformed variable assignment, name has to start with $\n");
 483
 484                         /* get key/value for this variable */
 485                         char *v_key = value, *v_value;
 486                         if ((v_value = strstr(value, " ")) == NULL)
 487                                 die("Malformed variable assignment, need a value\n");
 488
 489                         *(v_value++) = '\0';
 490
 491                         struct Variable *new = scalloc(sizeof(struct Variable));
 492                         new->key = sstrdup(v_key);
 493                         new->value = sstrdup(v_value);
 494                         SLIST_INSERT_HEAD(&variables, new, variables);
 495                         LOG("Got new variable %s = %s\n", v_key, v_value);
 496                         continue;
 497                 }
 498
 499                 if (strcasecmp(key, "ipc-socket") == 0) {
 500                         config.ipc_socket_path = sstrdup(value);
 501                         continue;
 502                 }
 503
 504                 die("Unknown configfile option: %s\n", key);
 505         }
 506         /* now grab all keys again */
 507         if (reload)
 508                 grab_all_keys(conn);
 509         fclose(handle);
 510
 511         REQUIRED_OPTION(terminal);
 512         REQUIRED_OPTION(font);
 513
 514         while (!SLIST_EMPTY(&variables)) {
 515                 struct Variable *v = SLIST_FIRST(&variables);
 516                 SLIST_REMOVE_HEAD(&variables, variables);
 517                 free(v->key);
 518                 free(v->value);
 519                 free(v);
 520         }
 521
 522         /* Set an empty name for every workspace which got no name */
 523         for (int i = 0; i < 10; i++) {
 524                 Workspace *ws = &(workspaces[i]);
 525                 if (ws->name != NULL) {
 526                         /* If the font was not specified when the workspace name
 527                          * was loaded, we need to predict the text width now */
 528                         if (ws->text_width == 0)
 529                                 ws->text_width = predict_text_width(global_conn,
 530                                                 config.font, ws->name, ws->name_len);
 531                         continue;
 532                 }
 533
 534                 workspace_set_name(&(workspaces[i]), NULL);
 535         }
 536
 537         return;
 538 }