git.sur5r.net Git - i3/i3/blob - src/cfgparse.y

   1 %{
   2 /*
   3  * vim:ts=8:expandtab
   4  *
   5  */
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <xcb/xcb.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <unistd.h>
  12 #include <fcntl.h>
  13 #include <stdlib.h>
  14 #include <errno.h>
  15
  16 #include "data.h"
  17 #include "config.h"
  18 #include "i3.h"
  19 #include "util.h"
  20 #include "queue.h"
  21 #include "table.h"
  22 #include "workspace.h"
  23 #include "xcb.h"
  24
  25
  26 typedef struct yy_buffer_state *YY_BUFFER_STATE;
  27 extern int yylex(void);
  28 extern int yyparse(void);
  29 extern FILE *yyin;
  30 YY_BUFFER_STATE yy_scan_string(const char *);
  31
  32 static struct bindings_head *current_bindings;
  33
  34 int yydebug = 1;
  35
  36 void yyerror(const char *str) {
  37         fprintf(stderr,"error: %s\n",str);
  38 }
  39
  40 int yywrap() {
  41         return 1;
  42 }
  43
  44 void parse_file(const char *f) {
  45         SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
  46         int fd, ret, read_bytes = 0;
  47         struct stat stbuf;
  48         char *buf;
  49         FILE *fstr;
  50         char buffer[1026], key[512], value[512];
  51
  52         if ((fd = open(f, O_RDONLY)) == -1)
  53                 die("Could not open configuration file: %s\n", strerror(errno));
  54
  55         if (fstat(fd, &stbuf) == -1)
  56                 die("Could not fstat file: %s\n", strerror(errno));
  57
  58         buf = smalloc(stbuf.st_size * sizeof(char));
  59         while (read_bytes < stbuf.st_size) {
  60                 if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
  61                         die("Could not read(): %s\n", strerror(errno));
  62                 read_bytes += ret;
  63         }
  64
  65         if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
  66                 die("Could not lseek: %s\n", strerror(errno));
  67
  68         if ((fstr = fdopen(fd, "r")) == NULL)
  69                 die("Could not fdopen: %s\n", strerror(errno));
  70
  71         while (!feof(fstr)) {
  72                 if (fgets(buffer, 1024, fstr) == NULL) {
  73                         if (feof(fstr))
  74                                 break;
  75                         die("Could not read configuration file\n");
  76                 }
  77
  78                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
  79                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
  80                     key[0] == '#' || strlen(key) < 3)
  81                         continue;
  82
  83                 if (strcasecmp(key, "set") == 0) {
  84                         if (value[0] != '$')
  85                                 die("Malformed variable assignment, name has to start with $\n");
  86
  87                         /* get key/value for this variable */
  88                         char *v_key = value, *v_value;
  89                         if ((v_value = strstr(value, " ")) == NULL)
  90                                 die("Malformed variable assignment, need a value\n");
  91
  92                         *(v_value++) = '\0';
  93
  94                         struct Variable *new = scalloc(sizeof(struct Variable));
  95                         new->key = sstrdup(v_key);
  96                         new->value = sstrdup(v_value);
  97                         SLIST_INSERT_HEAD(&variables, new, variables);
  98                         LOG("Got new variable %s = %s\n", v_key, v_value);
  99                         continue;
 100                 }
 101         }
 102
 103         /* For every custom variable, see how often it occurs in the file and
 104          * how much extra bytes it requires when replaced. */
 105         struct Variable *current, *nearest;
 106         int extra_bytes = 0;
 107         SLIST_FOREACH(current, &variables, variables) {
 108                 int extra = (strlen(current->value) - strlen(current->key));
 109                 char *next;
 110                 for (next = buf;
 111                      (next = strcasestr(buf + (next - buf), current->key)) != NULL;
 112                      next += strlen(current->key))
 113                         extra_bytes += extra;
 114         }
 115
 116         /* Then, allocate a new buffer and copy the file over to the new one,
 117          * but replace occurences of our variables */
 118         char *walk = buf, *destwalk;
 119         char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
 120         destwalk = new;
 121         while (walk < (buf + stbuf.st_size)) {
 122                 /* Find the next variable */
 123                 SLIST_FOREACH(current, &variables, variables)
 124                         current->next_match = strcasestr(walk, current->key);
 125                 nearest = NULL;
 126                 int distance = stbuf.st_size;
 127                 SLIST_FOREACH(current, &variables, variables) {
 128                         if (current->next_match == NULL)
 129                                 continue;
 130                         if ((current->next_match - walk) < distance) {
 131                                 distance = (current->next_match - walk);
 132                                 nearest = current;
 133                         }
 134                 }
 135                 if (nearest == NULL) {
 136                         /* If there are no more variables, we just copy the rest */
 137                         strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
 138                         destwalk += (buf + stbuf.st_size) - walk;
 139                         *destwalk = '\0';
 140                         break;
 141                 } else {
 142                         /* Copy until the next variable, then copy its value */
 143                         strncpy(destwalk, walk, distance);
 144                         strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
 145                         walk += distance + strlen(nearest->key);
 146                         destwalk += distance + strlen(nearest->value);
 147                 }
 148         }
 149
 150         yy_scan_string(new);
 151
 152         if (yyparse() != 0) {
 153                 fprintf(stderr, "Could not parse configfile\n");
 154                 exit(1);
 155         }
 156
 157         free(new);
 158         free(buf);
 159 }
 160
 161 %}
 162
 163 %union {
 164         int number;
 165         char *string;
 166         struct Colortriple *color;
 167         struct Assignment *assignment;
 168         struct Binding *binding;
 169 }
 170
 171 %token <number>NUMBER
 172 %token <string>WORD
 173 %token <string>STR
 174 %token <string>STR_NG
 175 %token <string>HEX
 176 %token TOKBIND
 177 %token TOKTERMINAL
 178 %token TOKCOMMENT
 179 %token TOKFONT
 180 %token TOKBINDSYM
 181 %token MODIFIER
 182 %token TOKCONTROL
 183 %token TOKSHIFT
 184 %token WHITESPACE
 185 %token TOKFLOATING_MODIFIER
 186 %token QUOTEDSTRING
 187 %token TOKWORKSPACE
 188 %token TOKSCREEN
 189 %token TOKASSIGN
 190 %token TOKSET
 191 %token TOKIPCSOCKET
 192 %token TOKEXEC
 193 %token TOKCOLOR
 194 %token TOKARROW
 195 %token TOKMODE
 196 %token TOKNEWCONTAINER
 197 %token TOKNEWWINDOW
 198 %token TOKCONTAINERMODE
 199 %token TOKSTACKLIMIT
 200
 201 %%
 202
 203 lines: /* empty */
 204         | lines WHITESPACE line
 205         | lines line
 206         ;
 207
 208 line:
 209         bindline
 210         | mode
 211         | floating_modifier
 212         | new_container
 213         | new_window
 214         | workspace
 215         | assign
 216         | ipcsocket
 217         | exec
 218         | color
 219         | terminal
 220         | font
 221         | comment
 222         ;
 223
 224 comment:
 225         TOKCOMMENT
 226         ;
 227
 228 command:
 229         STR
 230         ;
 231
 232 bindline:
 233         binding
 234         {
 235                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 236         }
 237         ;
 238
 239 binding:
 240         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 241         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 242         ;
 243
 244 bind:
 245         binding_modifiers NUMBER WHITESPACE command
 246         {
 247                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 248                 Binding *new = scalloc(sizeof(Binding));
 249
 250                 new->keycode = $<number>2;
 251                 new->mods = $<number>1;
 252                 new->command = sstrdup($<string>4);
 253
 254                 $<binding>$ = new;
 255         }
 256         ;
 257
 258 bindsym:
 259         binding_modifiers word_or_number WHITESPACE command
 260         {
 261                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 262                 Binding *new = scalloc(sizeof(Binding));
 263
 264                 new->symbol = sstrdup($<string>2);
 265                 new->mods = $<number>1;
 266                 new->command = sstrdup($<string>4);
 267
 268                 $<binding>$ = new;
 269         }
 270         ;
 271
 272 word_or_number:
 273         WORD
 274         | NUMBER
 275         {
 276                 asprintf(&$<string>$, "%d", $1);
 277         }
 278         ;
 279
 280 mode:
 281         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 282         {
 283                 if (strcasecmp($<string>3, "default") == 0) {
 284                         printf("You cannot use the name \"default\" for your mode\n");
 285                         exit(1);
 286                 }
 287                 printf("\t now in mode %s\n", $<string>3);
 288                 printf("\t current bindings = %p\n", current_bindings);
 289                 Binding *binding;
 290                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 291                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 292                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 293                 }
 294
 295                 struct Mode *mode = scalloc(sizeof(struct Mode));
 296                 mode->name = strdup($<string>3);
 297                 mode->bindings = current_bindings;
 298                 current_bindings = NULL;
 299                 SLIST_INSERT_HEAD(&modes, mode, modes);
 300         }
 301         ;
 302
 303
 304 modelines:
 305         /* empty */
 306         | modelines modeline
 307         ;
 308
 309 modeline:
 310         WHITESPACE
 311         | comment
 312         | binding
 313         {
 314                 if (current_bindings == NULL) {
 315                         current_bindings = scalloc(sizeof(struct bindings_head));
 316                         TAILQ_INIT(current_bindings);
 317                 }
 318
 319                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 320         }
 321         ;
 322
 323 floating_modifier:
 324         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 325         {
 326                 LOG("floating modifier = %d\n", $<number>3);
 327                 config.floating_modifier = $<number>3;
 328         }
 329         ;
 330
 331 new_container:
 332         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 333         {
 334                 LOG("new containers will be in mode %d\n", $<number>3);
 335                 config.container_mode = $<number>3;
 336
 337                 /* We also need to change the layout of the already existing
 338                  * workspaces here. Workspaces may exist at this point because
 339                  * of the other directives which are modifying workspaces
 340                  * (setting the preferred screen or name). While the workspace
 341                  * objects are already created, they have never been used.
 342                  * Thus, the user very likely awaits the default container mode
 343                  * to trigger in this case, regardless of where it is inside
 344                  * his configuration file. */
 345                 Workspace *ws;
 346                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 347                         if (ws->table == NULL)
 348                                 continue;
 349                         switch_layout_mode(global_conn,
 350                                            ws->table[0][0],
 351                                            config.container_mode);
 352                 }
 353         }
 354         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 355         {
 356                 LOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 357                 config.container_stack_limit = $<number>5;
 358                 config.container_stack_limit_value = $<number>7;
 359
 360                 /* See the comment above */
 361                 Workspace *ws;
 362                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 363                         if (ws->table == NULL)
 364                                 continue;
 365                         Container *con = ws->table[0][0];
 366                         con->stack_limit = config.container_stack_limit;
 367                         con->stack_limit_value = config.container_stack_limit_value;
 368                 }
 369         }
 370         ;
 371
 372 new_window:
 373         TOKNEWWINDOW WHITESPACE WORD
 374         {
 375                 LOG("new windows should start in mode %s\n", $<string>3);
 376                 config.default_border = strdup($<string>3);
 377         }
 378         ;
 379
 380 workspace:
 381         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKSCREEN WHITESPACE screen optional_workspace_name
 382         {
 383                 int ws_num = $<number>3;
 384                 if (ws_num < 1) {
 385                         LOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 386                 } else {
 387                         Workspace *ws = workspace_get(ws_num - 1);
 388                         ws->preferred_screen = sstrdup($<string>7);
 389                         if ($<string>8 != NULL)
 390                                 workspace_set_name(ws, $<string>8);
 391                 }
 392         }
 393         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 394         {
 395                 int ws_num = $<number>3;
 396                 if (ws_num < 1) {
 397                         LOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 398                 } else {
 399                         if ($<string>5 != NULL)
 400                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 401                 }
 402         }
 403         ;
 404
 405 optional_workspace_name:
 406         /* empty */                     { $<string>$ = NULL; }
 407         | WHITESPACE workspace_name     { $<string>$ = $<string>1; }
 408         ;
 409
 410 workspace_name:
 411         QUOTEDSTRING         { $<string>$ = $<string>1; }
 412         | STR                { $<string>$ = $<string>1; }
 413         ;
 414
 415 screen:
 416         NUMBER              { asprintf(&$<string>$, "%d", $<number>1); }
 417         | NUMBER 'x'        { asprintf(&$<string>$, "%d", $<number>1); }
 418         | NUMBER 'x' NUMBER { asprintf(&$<string>$, "%dx%d", $<number>1, $<number>3); }
 419         | 'x' NUMBER        { asprintf(&$<string>$, "x%d", $<number>2); }
 420         ;
 421
 422 assign:
 423         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 424         {
 425                 printf("assignment of %s\n", $<string>3);
 426
 427                 struct Assignment *new = $<assignment>6;
 428                 printf("  to %d\n", new->workspace);
 429                 printf("  floating = %d\n", new->floating);
 430                 new->windowclass_title = strdup($<string>3);
 431                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 432         }
 433         ;
 434
 435 assign_target:
 436         NUMBER
 437         {
 438                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 439                 new->workspace = $<number>1;
 440                 new->floating = ASSIGN_FLOATING_NO;
 441                 $<assignment>$ = new;
 442         }
 443         | '~'
 444         {
 445                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 446                 new->floating = ASSIGN_FLOATING_ONLY;
 447                 $<assignment>$ = new;
 448         }
 449         | '~' NUMBER
 450         {
 451                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 452                 new->workspace = $<number>2;
 453                 new->floating = ASSIGN_FLOATING;
 454                 $<assignment>$ = new;
 455         }
 456         ;
 457
 458 window_class:
 459         QUOTEDSTRING
 460         | STR_NG
 461         ;
 462
 463 optional_arrow:
 464         /* NULL */
 465         | TOKARROW WHITESPACE
 466         ;
 467
 468 ipcsocket:
 469         TOKIPCSOCKET WHITESPACE STR
 470         {
 471                 config.ipc_socket_path = sstrdup($<string>3);
 472         }
 473         ;
 474
 475 exec:
 476         TOKEXEC WHITESPACE STR
 477         {
 478                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 479                 new->command = sstrdup($<string>3);
 480                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 481         }
 482         ;
 483
 484 terminal:
 485         TOKTERMINAL WHITESPACE STR
 486         {
 487                 config.terminal = sstrdup($<string>3);
 488                 printf("terminal %s\n", config.terminal);
 489         }
 490         ;
 491
 492 font:
 493         TOKFONT WHITESPACE STR
 494         {
 495                 config.font = sstrdup($<string>3);
 496                 printf("font %s\n", config.font);
 497         }
 498         ;
 499
 500
 501 color:
 502         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 503         {
 504                 struct Colortriple *dest = $<color>1;
 505
 506                 dest->border = $<number>3;
 507                 dest->background = $<number>5;
 508                 dest->text = $<number>7;
 509         }
 510         ;
 511
 512 colorpixel:
 513         '#' HEX
 514         {
 515                 char *hex;
 516                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 517                         die("asprintf()");
 518                 $<number>$ = get_colorpixel(global_conn, hex);
 519                 free(hex);
 520         }
 521         ;
 522
 523
 524 binding_modifiers:
 525         /* NULL */                               { $<number>$ = 0; }
 526         | binding_modifier
 527         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 528         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 529         ;
 530
 531 binding_modifier:
 532         MODIFIER        { $<number>$ = $<number>1; }
 533         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 534         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 535         ;