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