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 /* prototype for src/cfgparse.y, will be cleaned up as soon as we completely
  30  * switched to the new scanner/parser. */
  31 void parse_file(const char *f);
  32
  33 Config config;
  34
  35 bool config_use_lexer = false;
  36
  37 /*
  38  * This function resolves ~ in pathnames.
  39  *
  40  */
  41 static char *glob_path(const char *path) {
  42         static glob_t globbuf;
  43         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
  44                 die("glob() failed");
  45         char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
  46         globfree(&globbuf);
  47         return result;
  48 }
  49
  50 /*
  51  * This function does a very simple replacement of each instance of key with value.
  52  *
  53  */
  54 static void replace_variable(char *buffer, const char *key, const char *value) {
  55         char *pos;
  56         /* To prevent endless recursions when the user makes an error configuring,
  57          * we stop after 100 replacements. That should be vastly more than enough. */
  58         int c = 0;
  59         while ((pos = strcasestr(buffer, key)) != NULL && c++ < 100) {
  60                 char *rest = pos + strlen(key);
  61                 *pos = '\0';
  62                 char *replaced;
  63                 asprintf(&replaced, "%s%s%s", buffer, value, rest);
  64                 /* Hm, this is a bit ugly, but sizeof(buffer) = 4, as it’s just a pointer.
  65                  * So we need to hard-code the dimensions here. */
  66                 strncpy(buffer, replaced, 1026);
  67                 free(replaced);
  68         }
  69 }
  70
  71 /**
  72  * Ungrabs all keys, to be called before re-grabbing the keys because of a
  73  * mapping_notify event or a configuration file reload
  74  *
  75  */
  76 void ungrab_all_keys(xcb_connection_t *conn) {
  77         LOG("Ungrabbing all keys\n");
  78         xcb_ungrab_key(conn, XCB_GRAB_ANY, root, XCB_BUTTON_MASK_ANY);
  79 }
  80
  81 static void grab_keycode_for_binding(xcb_connection_t *conn, Binding *bind, uint32_t keycode) {
  82         LOG("Grabbing %d\n", keycode);
  83         if ((bind->mods & BIND_MODE_SWITCH) != 0)
  84                 xcb_grab_key(conn, 0, root, 0, keycode,
  85                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_SYNC);
  86         else {
  87                 /* Grab the key in all combinations */
  88                 #define GRAB_KEY(modifier) xcb_grab_key(conn, 0, root, modifier, keycode, \
  89                                                         XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC)
  90                 GRAB_KEY(bind->mods);
  91                 GRAB_KEY(bind->mods | xcb_numlock_mask);
  92                 GRAB_KEY(bind->mods | xcb_numlock_mask | XCB_MOD_MASK_LOCK);
  93         }
  94 }
  95
  96 /*
  97  * Grab the bound keys (tell X to send us keypress events for those keycodes)
  98  *
  99  */
 100 void grab_all_keys(xcb_connection_t *conn) {
 101         Binding *bind;
 102         TAILQ_FOREACH(bind, &bindings, bindings) {
 103                 /* The easy case: the user specified a keycode directly. */
 104                 if (bind->keycode > 0) {
 105                         grab_keycode_for_binding(conn, bind, bind->keycode);
 106                         continue;
 107                 }
 108
 109                 /* We need to translate the symbol to a keycode */
 110                 xcb_keysym_t keysym = XStringToKeysym(bind->symbol);
 111                 if (keysym == NoSymbol) {
 112                         LOG("Could not translate string to key symbol: \"%s\"\n", bind->symbol);
 113                         continue;
 114                 }
 115
 116                 xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(keysyms, keysym);
 117                 if (keycodes == NULL) {
 118                         LOG("Could not translate symbol \"%s\"\n", bind->symbol);
 119                         continue;
 120                 }
 121
 122                 uint32_t last_keycode = 0;
 123                 bind->number_keycodes = 0;
 124                 for (xcb_keycode_t *walk = keycodes; *walk != 0; walk++) {
 125                         /* We hope duplicate keycodes will be returned in order
 126                          * and skip them */
 127                         if (last_keycode == *walk)
 128                                 continue;
 129                         grab_keycode_for_binding(conn, bind, *walk);
 130                         last_keycode = *walk;
 131                         bind->number_keycodes++;
 132                 }
 133                 LOG("Translated symbol \"%s\" to %d keycode\n", bind->symbol, bind->number_keycodes);
 134                 bind->translated_to = smalloc(bind->number_keycodes * sizeof(xcb_keycode_t));
 135                 memcpy(bind->translated_to, keycodes, bind->number_keycodes * sizeof(xcb_keycode_t));
 136                 free(keycodes);
 137         }
 138 }
 139
 140 /*
 141  * Reads the configuration from ~/.i3/config or /etc/i3/config if not found.
 142  *
 143  * If you specify override_configpath, only this path is used to look for a
 144  * configuration file.
 145  *
 146  */
 147 void load_configuration(xcb_connection_t *conn, const char *override_configpath, bool reload) {
 148         if (reload) {
 149                 /* First ungrab the keys */
 150                 ungrab_all_keys(conn);
 151
 152                 /* Clear the old binding and assignment lists */
 153                 Binding *bind;
 154                 while (!TAILQ_EMPTY(&bindings)) {
 155                         bind = TAILQ_FIRST(&bindings);
 156                         TAILQ_REMOVE(&bindings, bind, bindings);
 157                         FREE(bind->command);
 158                         FREE(bind);
 159                 }
 160
 161                 struct Assignment *assign;
 162                 while (!TAILQ_EMPTY(&assignments)) {
 163                         assign = TAILQ_FIRST(&assignments);
 164                         FREE(assign->windowclass_title);
 165                         TAILQ_REMOVE(&assignments, assign, assignments);
 166                         FREE(assign);
 167                 }
 168         }
 169
 170         SLIST_HEAD(variables_head, Variable) variables;
 171
 172 #define OPTION_STRING(name) \
 173         if (strcasecmp(key, #name) == 0) { \
 174                 config.name = sstrdup(value); \
 175                 continue; \
 176         }
 177
 178 #define REQUIRED_OPTION(name) \
 179         if (config.name == NULL) \
 180                 die("You did not specify required configuration option " #name "\n");
 181
 182 #define OPTION_COLORTRIPLE(opt, name) \
 183         if (strcasecmp(key, opt) == 0) { \
 184                 char border[8], background[8], text[8]; \
 185                 memset(border, 0, sizeof(border)); \
 186                 memset(background, 0, sizeof(background)); \
 187                 memset(text, 0, sizeof(text)); \
 188                 border[0] = background[0] = text[0] = '#'; \
 189                 if (sscanf(value, "#%06[0-9a-fA-F] #%06[0-9a-fA-F] #%06[0-9a-fA-F]", \
 190                     border + 1, background + 1, text + 1) != 3 || \
 191                     strlen(border) != 7 || \
 192                     strlen(background) != 7 || \
 193                     strlen(text) != 7) \
 194                         die("invalid color code line: %s\n", value); \
 195                 config.name.border = get_colorpixel(conn, border); \
 196                 config.name.background = get_colorpixel(conn, background); \
 197                 config.name.text = get_colorpixel(conn, text); \
 198                 continue; \
 199         }
 200
 201         /* Clear the old config or initialize the data structure */
 202         memset(&config, 0, sizeof(config));
 203
 204         SLIST_INIT(&variables);
 205
 206         /* Initialize default colors */
 207         config.client.focused.border = get_colorpixel(conn, "#4c7899");
 208         config.client.focused.background = get_colorpixel(conn, "#285577");
 209         config.client.focused.text = get_colorpixel(conn, "#ffffff");
 210
 211         config.client.focused_inactive.border = get_colorpixel(conn, "#4c7899");
 212         config.client.focused_inactive.background = get_colorpixel(conn, "#555555");
 213         config.client.focused_inactive.text = get_colorpixel(conn, "#ffffff");
 214
 215         config.client.unfocused.border = get_colorpixel(conn, "#333333");
 216         config.client.unfocused.background = get_colorpixel(conn, "#222222");
 217         config.client.unfocused.text = get_colorpixel(conn, "#888888");
 218
 219         config.client.urgent.border = get_colorpixel(conn, "#2f343a");
 220         config.client.urgent.background = get_colorpixel(conn, "#900000");
 221         config.client.urgent.text = get_colorpixel(conn, "#ffffff");
 222
 223         config.bar.focused.border = get_colorpixel(conn, "#4c7899");
 224         config.bar.focused.background = get_colorpixel(conn, "#285577");
 225         config.bar.focused.text = get_colorpixel(conn, "#ffffff");
 226
 227         config.bar.unfocused.border = get_colorpixel(conn, "#333333");
 228         config.bar.unfocused.background = get_colorpixel(conn, "#222222");
 229         config.bar.unfocused.text = get_colorpixel(conn, "#888888");
 230
 231         config.bar.urgent.border = get_colorpixel(conn, "#2f343a");
 232         config.bar.urgent.background = get_colorpixel(conn, "#900000");
 233         config.bar.urgent.text = get_colorpixel(conn, "#ffffff");
 234
 235         if (config_use_lexer) {
 236                 /* Yes, this will be cleaned up soon. */
 237                 if (override_configpath != NULL) {
 238                         parse_file(override_configpath);
 239                 } else {
 240                         FILE *handle;
 241                         char *globbed = glob_path("~/.i3/config");
 242                         if ((handle = fopen(globbed, "r")) == NULL) {
 243                                 if ((handle = fopen("/etc/i3/config", "r")) == NULL) {
 244                                         die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 245                                 } else {
 246                                         parse_file("/etc/i3/config");
 247                                 }
 248                         } else {
 249                                 parse_file(globbed);
 250                         }
 251                 }
 252         } else {
 253
 254         FILE *handle;
 255         if (override_configpath != NULL) {
 256                 if ((handle = fopen(override_configpath, "r")) == NULL)
 257                         die("Could not open configfile \"%s\".\n", override_configpath);
 258         } else {
 259                 /* We first check for ~/.i3/config, then for /etc/i3/config */
 260                 char *globbed = glob_path("~/.i3/config");
 261                 if ((handle = fopen(globbed, "r")) == NULL)
 262                         if ((handle = fopen("/etc/i3/config", "r")) == NULL)
 263                                 die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 264                 free(globbed);
 265         }
 266         char key[512], value[512], buffer[1026];
 267
 268         while (!feof(handle)) {
 269                 if (fgets(buffer, 1024, handle) == NULL) {
 270                         /* fgets returns NULL on EOF and on error, so see which one it is. */
 271                         if (feof(handle))
 272                                 break;
 273                         die("Could not read configuration file\n");
 274                 }
 275
 276                 if (config.terminal != NULL)
 277                         replace_variable(buffer, "$terminal", config.terminal);
 278
 279                 /* Replace all custom variables */
 280                 struct Variable *current;
 281                 SLIST_FOREACH(current, &variables, variables)
 282                         replace_variable(buffer, current->key, current->value);
 283
 284                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
 285                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
 286                     key[0] == '#' || strlen(key) < 3)
 287                         continue;
 288
 289                 OPTION_STRING(terminal);
 290                 OPTION_STRING(font);
 291
 292                 /* Colors */
 293                 OPTION_COLORTRIPLE("client.focused", client.focused);
 294                 OPTION_COLORTRIPLE("client.focused_inactive", client.focused_inactive);
 295                 OPTION_COLORTRIPLE("client.unfocused", client.unfocused);
 296                 OPTION_COLORTRIPLE("client.urgent", client.urgent);
 297                 OPTION_COLORTRIPLE("bar.focused", bar.focused);
 298                 OPTION_COLORTRIPLE("bar.unfocused", bar.unfocused);
 299                 OPTION_COLORTRIPLE("bar.urgent", bar.urgent);
 300
 301                 /* exec-lines (autostart) */
 302                 if (strcasecmp(key, "exec") == 0) {
 303                         struct Autostart *new = smalloc(sizeof(struct Autostart));
 304                         new->command = sstrdup(value);
 305                         TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 306                         continue;
 307                 }
 308
 309                 /* key bindings */
 310                 if (strcasecmp(key, "bind") == 0 || strcasecmp(key, "bindsym") == 0) {
 311                         #define CHECK_MODIFIER(name) \
 312                                 if (strncasecmp(walk, #name, strlen(#name)) == 0) { \
 313                                         modifiers |= BIND_##name; \
 314                                         walk += strlen(#name) + 1; \
 315                                         continue; \
 316                                 }
 317                         char *walk = value, *rest;
 318                         uint32_t modifiers = 0;
 319
 320                         while (*walk != '\0') {
 321                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 322                                 CHECK_MODIFIER(SHIFT);
 323                                 CHECK_MODIFIER(CONTROL);
 324                                 CHECK_MODIFIER(MODE_SWITCH);
 325                                 CHECK_MODIFIER(MOD1);
 326                                 CHECK_MODIFIER(MOD2);
 327                                 CHECK_MODIFIER(MOD3);
 328                                 CHECK_MODIFIER(MOD4);
 329                                 CHECK_MODIFIER(MOD5);
 330
 331                                 /* No modifier found? Then we’re done with this step */
 332                                 break;
 333                         }
 334
 335                         Binding *new = scalloc(sizeof(Binding));
 336
 337                         /* Now check for the keycode or copy the symbol */
 338                         if (strcasecmp(key, "bind") == 0) {
 339                                 int keycode = strtol(walk, &rest, 10);
 340                                 if (!rest || *rest != ' ')
 341                                         die("Invalid binding (keycode)\n");
 342                                 new->keycode = keycode;
 343                         } else {
 344                                 rest = walk;
 345                                 char *sym = rest;
 346                                 while (*rest != '\0' && *rest != ' ')
 347                                         rest++;
 348                                 if (*rest != ' ')
 349                                         die("Invalid binding (keysym)\n");
 350 #if defined(__OpenBSD__)
 351                                 size_t len = strlen(sym);
 352                                 if (len > (rest - sym))
 353                                         len = (rest - sym);
 354                                 new->symbol = smalloc(len + 1);
 355                                 memcpy(new->symbol, sym, len+1);
 356                                 new->symbol[len]='\0';
 357 #else
 358                                 new->symbol = strndup(sym, (rest - sym));
 359 #endif
 360                         }
 361                         rest++;
 362                         LOG("keycode = %d, symbol = %s, modifiers = %d, command = *%s*\n", new->keycode, new->symbol, modifiers, rest);
 363                         new->mods = modifiers;
 364                         new->command = sstrdup(rest);
 365                         TAILQ_INSERT_TAIL(&bindings, new, bindings);
 366                         continue;
 367                 }
 368
 369                 if (strcasecmp(key, "floating_modifier") == 0) {
 370                         char *walk = value;
 371                         uint32_t modifiers = 0;
 372
 373                         while (*walk != '\0') {
 374                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 375                                 CHECK_MODIFIER(SHIFT);
 376                                 CHECK_MODIFIER(CONTROL);
 377                                 CHECK_MODIFIER(MODE_SWITCH);
 378                                 CHECK_MODIFIER(MOD1);
 379                                 CHECK_MODIFIER(MOD2);
 380                                 CHECK_MODIFIER(MOD3);
 381                                 CHECK_MODIFIER(MOD4);
 382                                 CHECK_MODIFIER(MOD5);
 383
 384                                 /* No modifier found? Then we’re done with this step */
 385                                 break;
 386                         }
 387
 388                         LOG("Floating modifiers = %d\n", modifiers);
 389                         config.floating_modifier = modifiers;
 390                         continue;
 391                 }
 392
 393                 /* workspace "workspace number" [screen <screen>] ["name of the workspace"]
 394                  * with screen := <number> | <position>, e.g. screen 1280 or screen 1 */
 395                 if (strcasecmp(key, "name") == 0 || strcasecmp(key, "workspace") == 0) {
 396                         LOG("workspace: %s\n",value);
 397                         char *ws_str = sstrdup(value);
 398                         char *end = strchr(ws_str, ' ');
 399                         if (end == NULL)
 400                                 die("Malformed name, couln't find terminating space\n");
 401                         *end = '\0';
 402
 403                         /* Strip trailing whitespace */
 404                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 405                                 value[strlen(value)-1] = '\0';
 406
 407                         int ws_num = atoi(ws_str);
 408
 409                         if (ws_num < 1 || ws_num > 10)
 410                                 die("Malformed name, invalid workspace number\n");
 411
 412                         /* find the name */
 413                         char *name = value;
 414                         name += strlen(ws_str) + 1;
 415
 416                         if (strncasecmp(name, "screen ", strlen("screen ")) == 0) {
 417                                 char *screen = strdup(name + strlen("screen "));
 418                                 if ((end = strchr(screen, ' ')) != NULL)
 419                                         *end = '\0';
 420                                 LOG("Setting preferred screen for workspace %d to \"%s\"\n", ws_num, screen);
 421                                 workspaces[ws_num - 1].preferred_screen = screen;
 422
 423                                 name += strlen("screen ") + strlen(screen);
 424                         }
 425
 426                         /* Strip leading whitespace */
 427                         while (*name != '\0' && *name == ' ')
 428                                 name++;
 429
 430                         LOG("rest to parse = %s\n", name);
 431
 432                         if (name == '\0') {
 433                                 free(ws_str);
 434                                 continue;
 435                         }
 436
 437                         LOG("setting name to \"%s\"\n", name);
 438
 439                         if (*name != '\0')
 440                                 workspace_set_name(&(workspaces[ws_num - 1]), name);
 441                         free(ws_str);
 442                         continue;
 443                 }
 444
 445                 /* assign window class[/window title] → workspace */
 446                 if (strcasecmp(key, "assign") == 0) {
 447                         LOG("assign: \"%s\"\n", value);
 448                         char *class_title;
 449                         char *target;
 450                         char *end;
 451
 452                         /* If the window class/title is quoted we skip quotes */
 453                         if (value[0] == '"') {
 454                                 class_title = sstrdup(value+1);
 455                                 end = strchr(class_title, '"');
 456                         } else {
 457                                 class_title = sstrdup(value);
 458                                 /* If it is not quoted, we terminate it at the first space */
 459                                 end = strchr(class_title, ' ');
 460                         }
 461                         if (end == NULL)
 462                                 die("Malformed assignment, couldn't find terminating quote\n");
 463                         *end = '\0';
 464
 465                         /* Strip trailing whitespace */
 466                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 467                                 value[strlen(value)-1] = '\0';
 468
 469                         /* The target is the last argument separated by a space */
 470                         if ((target = strrchr(value, ' ')) == NULL)
 471                                 die("Malformed assignment, couldn't find target (\"%s\")\n", value);
 472                         target++;
 473
 474                         if (strchr(target, '~') == NULL && (atoi(target) < 1 || atoi(target) > 10))
 475                                 die("Malformed assignment, invalid workspace number\n");
 476
 477                         LOG("assignment parsed: \"%s\" to \"%s\"\n", class_title, target);
 478
 479                         struct Assignment *new = scalloc(sizeof(struct Assignment));
 480                         new->windowclass_title = class_title;
 481                         if (strchr(target, '~') != NULL)
 482                                 new->floating = ASSIGN_FLOATING_ONLY;
 483
 484                         while (*target == '~')
 485                                 target++;
 486
 487                         if (atoi(target) >= 1 && atoi(target) <= 10) {
 488                                 if (new->floating == ASSIGN_FLOATING_ONLY)
 489                                         new->floating = ASSIGN_FLOATING;
 490                                 new->workspace = atoi(target);
 491                         }
 492                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 493
 494                         LOG("Assignment loaded: \"%s\":\n", class_title);
 495                         if (new->floating != ASSIGN_FLOATING_ONLY)
 496                                 LOG(" to workspace %d\n", new->workspace);
 497
 498                         if (new->floating != ASSIGN_FLOATING_NO)
 499                                 LOG(" will be floating\n");
 500
 501                         continue;
 502                 }
 503
 504                 /* set a custom variable */
 505                 if (strcasecmp(key, "set") == 0) {
 506                         if (value[0] != '$')
 507                                 die("Malformed variable assignment, name has to start with $\n");
 508
 509                         /* get key/value for this variable */
 510                         char *v_key = value, *v_value;
 511                         if ((v_value = strstr(value, " ")) == NULL)
 512                                 die("Malformed variable assignment, need a value\n");
 513
 514                         *(v_value++) = '\0';
 515
 516                         struct Variable *new = scalloc(sizeof(struct Variable));
 517                         new->key = sstrdup(v_key);
 518                         new->value = sstrdup(v_value);
 519                         SLIST_INSERT_HEAD(&variables, new, variables);
 520                         LOG("Got new variable %s = %s\n", v_key, v_value);
 521                         continue;
 522                 }
 523
 524                 if (strcasecmp(key, "ipc-socket") == 0) {
 525                         config.ipc_socket_path = sstrdup(value);
 526                         continue;
 527                 }
 528
 529                 die("Unknown configfile option: %s\n", key);
 530         }
 531         /* now grab all keys again */
 532         if (reload)
 533                 grab_all_keys(conn);
 534         fclose(handle);
 535
 536         while (!SLIST_EMPTY(&variables)) {
 537                 struct Variable *v = SLIST_FIRST(&variables);
 538                 SLIST_REMOVE_HEAD(&variables, variables);
 539                 free(v->key);
 540                 free(v->value);
 541                 free(v);
 542         }
 543         }
 544
 545         REQUIRED_OPTION(terminal);
 546         REQUIRED_OPTION(font);
 547
 548         /* Set an empty name for every workspace which got no name */
 549         for (int i = 0; i < 10; i++) {
 550                 Workspace *ws = &(workspaces[i]);
 551                 if (ws->name != NULL) {
 552                         /* If the font was not specified when the workspace name
 553                          * was loaded, we need to predict the text width now */
 554                         if (ws->text_width == 0)
 555                                 ws->text_width = predict_text_width(global_conn,
 556                                                 config.font, ws->name, ws->name_len);
 557                         continue;
 558                 }
 559
 560                 workspace_set_name(&(workspaces[i]), NULL);
 561         }
 562
 563         return;
 564 }