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