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