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.bar.focused.border = get_colorpixel(conn, "#4c7899");
 214         config.bar.focused.background = get_colorpixel(conn, "#285577");
 215         config.bar.focused.text = get_colorpixel(conn, "#ffffff");
 216
 217         config.bar.unfocused.border = get_colorpixel(conn, "#333333");
 218         config.bar.unfocused.background = get_colorpixel(conn, "#222222");
 219         config.bar.unfocused.text = get_colorpixel(conn, "#888888");
 220
 221         FILE *handle;
 222         if (override_configpath != NULL) {
 223                 if ((handle = fopen(override_configpath, "r")) == NULL)
 224                         die("Could not open configfile \"%s\".\n", override_configpath);
 225         } else {
 226                 /* We first check for ~/.i3/config, then for /etc/i3/config */
 227                 char *globbed = glob_path("~/.i3/config");
 228                 if ((handle = fopen(globbed, "r")) == NULL)
 229                         if ((handle = fopen("/etc/i3/config", "r")) == NULL)
 230                                 die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 231                 free(globbed);
 232         }
 233         char key[512], value[512], buffer[1026];
 234
 235         while (!feof(handle)) {
 236                 if (fgets(buffer, 1024, handle) == NULL) {
 237                         /* fgets returns NULL on EOF and on error, so see which one it is. */
 238                         if (feof(handle))
 239                                 break;
 240                         die("Could not read configuration file\n");
 241                 }
 242
 243                 if (config.terminal != NULL)
 244                         replace_variable(buffer, "$terminal", config.terminal);
 245
 246                 /* Replace all custom variables */
 247                 struct Variable *current;
 248                 SLIST_FOREACH(current, &variables, variables)
 249                         replace_variable(buffer, current->key, current->value);
 250
 251                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
 252                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
 253                     key[0] == '#' || strlen(key) < 3)
 254                         continue;
 255
 256                 OPTION_STRING(terminal);
 257                 OPTION_STRING(font);
 258
 259                 /* Colors */
 260                 OPTION_COLORTRIPLE("client.focused", client.focused);
 261                 OPTION_COLORTRIPLE("client.focused_inactive", client.focused_inactive);
 262                 OPTION_COLORTRIPLE("client.unfocused", client.unfocused);
 263                 OPTION_COLORTRIPLE("bar.focused", bar.focused);
 264                 OPTION_COLORTRIPLE("bar.unfocused", bar.unfocused);
 265
 266                 /* exec-lines (autostart) */
 267                 if (strcasecmp(key, "exec") == 0) {
 268                         struct Autostart *new = smalloc(sizeof(struct Autostart));
 269                         new->command = sstrdup(value);
 270                         TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 271                         continue;
 272                 }
 273
 274                 /* key bindings */
 275                 if (strcasecmp(key, "bind") == 0 || strcasecmp(key, "bindsym") == 0) {
 276                         #define CHECK_MODIFIER(name) \
 277                                 if (strncasecmp(walk, #name, strlen(#name)) == 0) { \
 278                                         modifiers |= BIND_##name; \
 279                                         walk += strlen(#name) + 1; \
 280                                         continue; \
 281                                 }
 282                         char *walk = value, *rest;
 283                         uint32_t modifiers = 0;
 284
 285                         while (*walk != '\0') {
 286                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 287                                 CHECK_MODIFIER(SHIFT);
 288                                 CHECK_MODIFIER(CONTROL);
 289                                 CHECK_MODIFIER(MODE_SWITCH);
 290                                 CHECK_MODIFIER(MOD1);
 291                                 CHECK_MODIFIER(MOD2);
 292                                 CHECK_MODIFIER(MOD3);
 293                                 CHECK_MODIFIER(MOD4);
 294                                 CHECK_MODIFIER(MOD5);
 295
 296                                 /* No modifier found? Then we’re done with this step */
 297                                 break;
 298                         }
 299
 300                         Binding *new = scalloc(sizeof(Binding));
 301
 302                         /* Now check for the keycode or copy the symbol */
 303                         if (strcasecmp(key, "bind") == 0) {
 304                                 int keycode = strtol(walk, &rest, 10);
 305                                 if (!rest || *rest != ' ')
 306                                         die("Invalid binding (keycode)\n");
 307                                 new->keycode = keycode;
 308                         } else {
 309                                 rest = walk;
 310                                 char *sym = rest;
 311                                 while (*rest != '\0' && *rest != ' ')
 312                                         rest++;
 313                                 if (*rest != ' ')
 314                                         die("Invalid binding (keysym)\n");
 315 #if defined(__OpenBSD__)
 316                                 size_t len = strlen(sym);
 317                                 if (len > (rest - sym))
 318                                         len = (rest - sym);
 319                                 new->symbol = smalloc(len + 1);
 320                                 memcpy(new->symbol, sym, len+1);
 321                                 new->symbol[len]='\0';
 322 #else
 323                                 new->symbol = strndup(sym, (rest - sym));
 324 #endif
 325                         }
 326                         rest++;
 327                         LOG("keycode = %d, symbol = %s, modifiers = %d, command = *%s*\n", new->keycode, new->symbol, modifiers, rest);
 328                         new->mods = modifiers;
 329                         new->command = sstrdup(rest);
 330                         TAILQ_INSERT_TAIL(&bindings, new, bindings);
 331                         continue;
 332                 }
 333
 334                 if (strcasecmp(key, "floating_modifier") == 0) {
 335                         char *walk = value;
 336                         uint32_t modifiers = 0;
 337
 338                         while (*walk != '\0') {
 339                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 340                                 CHECK_MODIFIER(SHIFT);
 341                                 CHECK_MODIFIER(CONTROL);
 342                                 CHECK_MODIFIER(MODE_SWITCH);
 343                                 CHECK_MODIFIER(MOD1);
 344                                 CHECK_MODIFIER(MOD2);
 345                                 CHECK_MODIFIER(MOD3);
 346                                 CHECK_MODIFIER(MOD4);
 347                                 CHECK_MODIFIER(MOD5);
 348
 349                                 /* No modifier found? Then we’re done with this step */
 350                                 break;
 351                         }
 352
 353                         LOG("Floating modifiers = %d\n", modifiers);
 354                         config.floating_modifier = modifiers;
 355                         continue;
 356                 }
 357
 358                 /* workspace "workspace number" [screen <screen>] ["name of the workspace"]
 359                  * with screen := <number> | <position>, e.g. screen 1280 or screen 1 */
 360                 if (strcasecmp(key, "name") == 0 || strcasecmp(key, "workspace") == 0) {
 361                         LOG("workspace: %s\n",value);
 362                         char *ws_str = sstrdup(value);
 363                         char *end = strchr(ws_str, ' ');
 364                         if (end == NULL)
 365                                 die("Malformed name, couln't find terminating space\n");
 366                         *end = '\0';
 367
 368                         /* Strip trailing whitespace */
 369                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 370                                 value[strlen(value)-1] = '\0';
 371
 372                         int ws_num = atoi(ws_str);
 373
 374                         if (ws_num < 1 || ws_num > 10)
 375                                 die("Malformed name, invalid workspace number\n");
 376
 377                         /* find the name */
 378                         char *name = value;
 379                         name += strlen(ws_str) + 1;
 380
 381                         if (strncasecmp(name, "screen ", strlen("screen ")) == 0) {
 382                                 char *screen = strdup(name + strlen("screen "));
 383                                 if ((end = strchr(screen, ' ')) != NULL)
 384                                         *end = '\0';
 385                                 LOG("Setting preferred screen for workspace %d to \"%s\"\n", ws_num, screen);
 386                                 workspaces[ws_num - 1].preferred_screen = screen;
 387
 388                                 name += strlen("screen ") + strlen(screen);
 389                         }
 390
 391                         /* Strip leading whitespace */
 392                         while (*name != '\0' && *name == ' ')
 393                                 name++;
 394
 395                         LOG("rest to parse = %s\n", name);
 396
 397                         if (name == '\0') {
 398                                 free(ws_str);
 399                                 continue;
 400                         }
 401
 402                         LOG("setting name to \"%s\"\n", name);
 403
 404                         if (*name != '\0')
 405                                 workspace_set_name(&(workspaces[ws_num - 1]), name);
 406                         free(ws_str);
 407                         continue;
 408                 }
 409
 410                 /* assign window class[/window title] → workspace */
 411                 if (strcasecmp(key, "assign") == 0) {
 412                         LOG("assign: \"%s\"\n", value);
 413                         char *class_title;
 414                         char *target;
 415                         char *end;
 416
 417                         /* If the window class/title is quoted we skip quotes */
 418                         if (value[0] == '"') {
 419                                 class_title = sstrdup(value+1);
 420                                 end = strchr(class_title, '"');
 421                         } else {
 422                                 class_title = sstrdup(value);
 423                                 /* If it is not quoted, we terminate it at the first space */
 424                                 end = strchr(class_title, ' ');
 425                         }
 426                         if (end == NULL)
 427                                 die("Malformed assignment, couldn't find terminating quote\n");
 428                         *end = '\0';
 429
 430                         /* Strip trailing whitespace */
 431                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 432                                 value[strlen(value)-1] = '\0';
 433
 434                         /* The target is the last argument separated by a space */
 435                         if ((target = strrchr(value, ' ')) == NULL)
 436                                 die("Malformed assignment, couldn't find target (\"%s\")\n", value);
 437                         target++;
 438
 439                         if (strchr(target, '~') == NULL && (atoi(target) < 1 || atoi(target) > 10))
 440                                 die("Malformed assignment, invalid workspace number\n");
 441
 442                         LOG("assignment parsed: \"%s\" to \"%s\"\n", class_title, target);
 443
 444                         struct Assignment *new = scalloc(sizeof(struct Assignment));
 445                         new->windowclass_title = class_title;
 446                         if (strchr(target, '~') != NULL)
 447                                 new->floating = ASSIGN_FLOATING_ONLY;
 448
 449                         while (*target == '~')
 450                                 target++;
 451
 452                         if (atoi(target) >= 1 && atoi(target) <= 10) {
 453                                 if (new->floating == ASSIGN_FLOATING_ONLY)
 454                                         new->floating = ASSIGN_FLOATING;
 455                                 new->workspace = atoi(target);
 456                         }
 457                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 458
 459                         LOG("Assignment loaded: \"%s\":\n", class_title);
 460                         if (new->floating != ASSIGN_FLOATING_ONLY)
 461                                 LOG(" to workspace %d\n", new->workspace);
 462
 463                         if (new->floating != ASSIGN_FLOATING_NO)
 464                                 LOG(" will be floating\n");
 465
 466                         continue;
 467                 }
 468
 469                 /* set a custom variable */
 470                 if (strcasecmp(key, "set") == 0) {
 471                         if (value[0] != '$')
 472                                 die("Malformed variable assignment, name has to start with $\n");
 473
 474                         /* get key/value for this variable */
 475                         char *v_key = value, *v_value;
 476                         if ((v_value = strstr(value, " ")) == NULL)
 477                                 die("Malformed variable assignment, need a value\n");
 478
 479                         *(v_value++) = '\0';
 480
 481                         struct Variable *new = scalloc(sizeof(struct Variable));
 482                         new->key = sstrdup(v_key);
 483                         new->value = sstrdup(v_value);
 484                         SLIST_INSERT_HEAD(&variables, new, variables);
 485                         LOG("Got new variable %s = %s\n", v_key, v_value);
 486                         continue;
 487                 }
 488
 489                 if (strcasecmp(key, "ipc-socket") == 0) {
 490                         config.ipc_socket_path = sstrdup(value);
 491                         continue;
 492                 }
 493
 494                 die("Unknown configfile option: %s\n", key);
 495         }
 496         /* now grab all keys again */
 497         if (reload)
 498                 grab_all_keys(conn);
 499         fclose(handle);
 500
 501         REQUIRED_OPTION(terminal);
 502         REQUIRED_OPTION(font);
 503
 504         while (!SLIST_EMPTY(&variables)) {
 505                 struct Variable *v = SLIST_FIRST(&variables);
 506                 SLIST_REMOVE_HEAD(&variables, variables);
 507                 free(v->key);
 508                 free(v->value);
 509                 free(v);
 510         }
 511
 512         /* Set an empty name for every workspace which got no name */
 513         for (int i = 0; i < 10; i++) {
 514                 Workspace *ws = &(workspaces[i]);
 515                 if (ws->name != NULL) {
 516                         /* If the font was not specified when the workspace name
 517                          * was loaded, we need to predict the text width now */
 518                         if (ws->text_width == 0)
 519                                 ws->text_width = predict_text_width(global_conn,
 520                                                 config.font, ws->name, ws->name_len);
 521                         continue;
 522                 }
 523
 524                 workspace_set_name(&(workspaces[i]), NULL);
 525         }
 526
 527         return;
 528 }