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