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