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

   1 %{
   2 /*
   3  * vim:ts=8:expandtab
   4  *
   5  */
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <unistd.h>
   9 #include <fcntl.h>
  10
  11 #include "all.h"
  12
  13 typedef struct yy_buffer_state *YY_BUFFER_STATE;
  14 extern int yylex(struct context *context);
  15 extern int yyparse(void);
  16 extern FILE *yyin;
  17 YY_BUFFER_STATE yy_scan_string(const char *);
  18
  19 static struct bindings_head *current_bindings;
  20 static struct context *context;
  21
  22 /* We don’t need yydebug for now, as we got decent error messages using
  23  * yyerror(). Should you ever want to extend the parser, it might be handy
  24  * to just comment it in again, so it stays here. */
  25 //int yydebug = 1;
  26
  27 void yyerror(const char *error_message) {
  28         ELOG("\n");
  29         ELOG("CONFIG: %s\n", error_message);
  30         ELOG("CONFIG: in file \"%s\", line %d:\n",
  31                 context->filename, context->line_number);
  32         ELOG("CONFIG:   %s\n", context->line_copy);
  33         ELOG("CONFIG:   ");
  34         for (int c = 1; c <= context->last_column; c++)
  35                 if (c >= context->first_column)
  36                         printf("^");
  37                 else printf(" ");
  38         printf("\n");
  39         ELOG("\n");
  40 }
  41
  42 int yywrap() {
  43         return 1;
  44 }
  45
  46 void parse_file(const char *f) {
  47         SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
  48         int fd, ret, read_bytes = 0;
  49         struct stat stbuf;
  50         char *buf;
  51         FILE *fstr;
  52         char buffer[1026], key[512], value[512];
  53
  54         if ((fd = open(f, O_RDONLY)) == -1)
  55                 die("Could not open configuration file: %s\n", strerror(errno));
  56
  57         if (fstat(fd, &stbuf) == -1)
  58                 die("Could not fstat file: %s\n", strerror(errno));
  59
  60         buf = scalloc((stbuf.st_size + 1) * sizeof(char));
  61         while (read_bytes < stbuf.st_size) {
  62                 if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
  63                         die("Could not read(): %s\n", strerror(errno));
  64                 read_bytes += ret;
  65         }
  66
  67         if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
  68                 die("Could not lseek: %s\n", strerror(errno));
  69
  70         if ((fstr = fdopen(fd, "r")) == NULL)
  71                 die("Could not fdopen: %s\n", strerror(errno));
  72
  73         while (!feof(fstr)) {
  74                 if (fgets(buffer, 1024, fstr) == NULL) {
  75                         if (feof(fstr))
  76                                 break;
  77                         die("Could not read configuration file\n");
  78                 }
  79
  80                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
  81                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
  82                     key[0] == '#' || strlen(key) < 3)
  83                         continue;
  84
  85                 if (strcasecmp(key, "set") == 0) {
  86                         if (value[0] != '$')
  87                                 die("Malformed variable assignment, name has to start with $\n");
  88
  89                         /* get key/value for this variable */
  90                         char *v_key = value, *v_value;
  91                         if ((v_value = strstr(value, " ")) == NULL)
  92                                 die("Malformed variable assignment, need a value\n");
  93
  94                         *(v_value++) = '\0';
  95
  96                         struct Variable *new = scalloc(sizeof(struct Variable));
  97                         new->key = sstrdup(v_key);
  98                         new->value = sstrdup(v_value);
  99                         SLIST_INSERT_HEAD(&variables, new, variables);
 100                         DLOG("Got new variable %s = %s\n", v_key, v_value);
 101                         continue;
 102                 }
 103         }
 104
 105         /* For every custom variable, see how often it occurs in the file and
 106          * how much extra bytes it requires when replaced. */
 107         struct Variable *current, *nearest;
 108         int extra_bytes = 0;
 109         /* We need to copy the buffer because we need to invalidate the
 110          * variables (otherwise we will count them twice, which is bad when
 111          * 'extra' is negative) */
 112         char *bufcopy = sstrdup(buf);
 113         SLIST_FOREACH(current, &variables, variables) {
 114                 int extra = (strlen(current->value) - strlen(current->key));
 115                 char *next;
 116                 for (next = bufcopy;
 117                      (next = strcasestr(bufcopy + (next - bufcopy), current->key)) != NULL;
 118                      next += strlen(current->key)) {
 119                         *next = '_';
 120                         extra_bytes += extra;
 121                 }
 122         }
 123         FREE(bufcopy);
 124
 125         /* Then, allocate a new buffer and copy the file over to the new one,
 126          * but replace occurences of our variables */
 127         char *walk = buf, *destwalk;
 128         char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
 129         destwalk = new;
 130         while (walk < (buf + stbuf.st_size)) {
 131                 /* Find the next variable */
 132                 SLIST_FOREACH(current, &variables, variables)
 133                         current->next_match = strcasestr(walk, current->key);
 134                 nearest = NULL;
 135                 int distance = stbuf.st_size;
 136                 SLIST_FOREACH(current, &variables, variables) {
 137                         if (current->next_match == NULL)
 138                                 continue;
 139                         if ((current->next_match - walk) < distance) {
 140                                 distance = (current->next_match - walk);
 141                                 nearest = current;
 142                         }
 143                 }
 144                 if (nearest == NULL) {
 145                         /* If there are no more variables, we just copy the rest */
 146                         strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
 147                         destwalk += (buf + stbuf.st_size) - walk;
 148                         *destwalk = '\0';
 149                         break;
 150                 } else {
 151                         /* Copy until the next variable, then copy its value */
 152                         strncpy(destwalk, walk, distance);
 153                         strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
 154                         walk += distance + strlen(nearest->key);
 155                         destwalk += distance + strlen(nearest->value);
 156                 }
 157         }
 158
 159         yy_scan_string(new);
 160
 161         context = scalloc(sizeof(struct context));
 162         context->filename = f;
 163
 164         if (yyparse() != 0) {
 165                 fprintf(stderr, "Could not parse configfile\n");
 166                 exit(1);
 167         }
 168
 169         FREE(context->line_copy);
 170         free(context);
 171         free(new);
 172         free(buf);
 173
 174         while (!SLIST_EMPTY(&variables)) {
 175                 current = SLIST_FIRST(&variables);
 176                 FREE(current->key);
 177                 FREE(current->value);
 178                 SLIST_REMOVE_HEAD(&variables, variables);
 179                 FREE(current);
 180         }
 181 }
 182
 183 %}
 184
 185 %expect 1
 186 %error-verbose
 187 %lex-param { struct context *context }
 188
 189 %union {
 190         int number;
 191         char *string;
 192         uint32_t *single_color;
 193         struct Colortriple *color;
 194         struct Assignment *assignment;
 195         struct Binding *binding;
 196 }
 197
 198 %token <number>NUMBER "<number>"
 199 %token <string>WORD "<word>"
 200 %token <string>STR "<string>"
 201 %token <string>STR_NG "<string (non-greedy)>"
 202 %token <string>HEX "<hex>"
 203 %token <string>OUTPUT "<RandR output>"
 204 %token TOKBIND
 205 %token TOKTERMINAL
 206 %token TOKCOMMENT "<comment>"
 207 %token TOKFONT "font"
 208 %token TOKBINDSYM "bindsym"
 209 %token MODIFIER "<modifier>"
 210 %token TOKCONTROL "control"
 211 %token TOKSHIFT "shift"
 212 %token WHITESPACE "<whitespace>"
 213 %token TOKFLOATING_MODIFIER "floating_modifier"
 214 %token QUOTEDSTRING "<quoted string>"
 215 %token TOKWORKSPACE "workspace"
 216 %token TOKOUTPUT "output"
 217 %token TOKASSIGN "assign"
 218 %token TOKSET
 219 %token TOKIPCSOCKET "ipc_socket"
 220 %token TOKRESTARTSTATE "restart_state"
 221 %token TOKEXEC "exec"
 222 %token TOKSINGLECOLOR
 223 %token TOKCOLOR
 224 %token TOKARROW "→"
 225 %token TOKMODE "mode"
 226 %token TOKNEWCONTAINER "new_container"
 227 %token TOKNEWWINDOW "new_window"
 228 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 229 %token TOKWORKSPACEBAR "workspace_bar"
 230 %token TOKCONTAINERMODE "default/stacking/tabbed"
 231 %token TOKSTACKLIMIT "stack-limit"
 232
 233 %%
 234
 235 lines: /* empty */
 236         | lines WHITESPACE line
 237         | lines error
 238         | lines line
 239         ;
 240
 241 line:
 242         bindline
 243         | mode
 244         | floating_modifier
 245         | new_container
 246         | new_window
 247         | focus_follows_mouse
 248         | workspace_bar
 249         | workspace
 250         | assign
 251         | ipcsocket
 252         | restart_state
 253         | exec
 254         | single_color
 255         | color
 256         | terminal
 257         | font
 258         | comment
 259         ;
 260
 261 comment:
 262         TOKCOMMENT
 263         ;
 264
 265 command:
 266         STR
 267         ;
 268
 269 bindline:
 270         binding
 271         {
 272                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 273         }
 274         ;
 275
 276 binding:
 277         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 278         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 279         ;
 280
 281 bind:
 282         binding_modifiers NUMBER WHITESPACE command
 283         {
 284                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 285                 Binding *new = scalloc(sizeof(Binding));
 286
 287                 new->keycode = $<number>2;
 288                 new->mods = $<number>1;
 289                 new->command = $<string>4;
 290
 291                 $<binding>$ = new;
 292         }
 293         ;
 294
 295 bindsym:
 296         binding_modifiers word_or_number WHITESPACE command
 297         {
 298                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 299                 Binding *new = scalloc(sizeof(Binding));
 300
 301                 new->symbol = $<string>2;
 302                 new->mods = $<number>1;
 303                 new->command = $<string>4;
 304
 305                 $<binding>$ = new;
 306         }
 307         ;
 308
 309 word_or_number:
 310         WORD
 311         | NUMBER
 312         {
 313                 asprintf(&$<string>$, "%d", $1);
 314         }
 315         ;
 316
 317 mode:
 318         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 319         {
 320                 if (strcasecmp($<string>3, "default") == 0) {
 321                         printf("You cannot use the name \"default\" for your mode\n");
 322                         exit(1);
 323                 }
 324                 printf("\t now in mode %s\n", $<string>3);
 325                 printf("\t current bindings = %p\n", current_bindings);
 326                 Binding *binding;
 327                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 328                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 329                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 330                 }
 331
 332                 struct Mode *mode = scalloc(sizeof(struct Mode));
 333                 mode->name = $<string>3;
 334                 mode->bindings = current_bindings;
 335                 current_bindings = NULL;
 336                 SLIST_INSERT_HEAD(&modes, mode, modes);
 337         }
 338         ;
 339
 340
 341 modelines:
 342         /* empty */
 343         | modelines modeline
 344         ;
 345
 346 modeline:
 347         WHITESPACE
 348         | comment
 349         | binding
 350         {
 351                 if (current_bindings == NULL) {
 352                         current_bindings = scalloc(sizeof(struct bindings_head));
 353                         TAILQ_INIT(current_bindings);
 354                 }
 355
 356                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 357         }
 358         ;
 359
 360 floating_modifier:
 361         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 362         {
 363                 DLOG("floating modifier = %d\n", $<number>3);
 364                 config.floating_modifier = $<number>3;
 365         }
 366         ;
 367
 368 new_container:
 369         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 370         {
 371                 DLOG("new containers will be in mode %d\n", $<number>3);
 372                 config.container_mode = $<number>3;
 373
 374 #if 0
 375                 /* We also need to change the layout of the already existing
 376                  * workspaces here. Workspaces may exist at this point because
 377                  * of the other directives which are modifying workspaces
 378                  * (setting the preferred screen or name). While the workspace
 379                  * objects are already created, they have never been used.
 380                  * Thus, the user very likely awaits the default container mode
 381                  * to trigger in this case, regardless of where it is inside
 382                  * his configuration file. */
 383                 Workspace *ws;
 384                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 385                         if (ws->table == NULL)
 386                                 continue;
 387                         switch_layout_mode(global_conn,
 388                                            ws->table[0][0],
 389                                            config.container_mode);
 390                 }
 391 #endif
 392         }
 393         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 394         {
 395                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 396                 config.container_stack_limit = $<number>5;
 397                 config.container_stack_limit_value = $<number>7;
 398
 399 #if 0
 400                 /* See the comment above */
 401                 Workspace *ws;
 402                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 403                         if (ws->table == NULL)
 404                                 continue;
 405                         Container *con = ws->table[0][0];
 406                         con->stack_limit = config.container_stack_limit;
 407                         con->stack_limit_value = config.container_stack_limit_value;
 408                 }
 409 #endif
 410         }
 411         ;
 412
 413 new_window:
 414         TOKNEWWINDOW WHITESPACE WORD
 415         {
 416                 DLOG("new windows should start in mode %s\n", $<string>3);
 417                 config.default_border = sstrdup($<string>3);
 418         }
 419         ;
 420
 421 bool:
 422         NUMBER
 423         {
 424                 $<number>$ = ($<number>1 == 1);
 425         }
 426         | WORD
 427         {
 428                 DLOG("checking word \"%s\"\n", $<string>1);
 429                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 430                               strcasecmp($<string>1, "true") == 0 ||
 431                               strcasecmp($<string>1, "on") == 0 ||
 432                               strcasecmp($<string>1, "enable") == 0 ||
 433                               strcasecmp($<string>1, "active") == 0);
 434         }
 435         ;
 436
 437 focus_follows_mouse:
 438         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 439         {
 440                 DLOG("focus follows mouse = %d\n", $<number>3);
 441                 config.disable_focus_follows_mouse = !($<number>3);
 442         }
 443         ;
 444
 445 workspace_bar:
 446         TOKWORKSPACEBAR WHITESPACE bool
 447         {
 448                 DLOG("workspace bar = %d\n", $<number>3);
 449                 config.disable_workspace_bar = !($<number>3);
 450         }
 451         ;
 452
 453 workspace:
 454         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 455         {
 456                 int ws_num = $<number>3;
 457                 if (ws_num < 1) {
 458                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 459                 } else {
 460 #if 0
 461                         Workspace *ws = workspace_get(ws_num - 1);
 462                         ws->preferred_output = $<string>7;
 463                         if ($<string>8 != NULL) {
 464                                 workspace_set_name(ws, $<string>8);
 465                                 free($<string>8);
 466                         }
 467 #endif
 468                 }
 469         }
 470         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 471         {
 472                 int ws_num = $<number>3;
 473                 if (ws_num < 1) {
 474                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 475                 } else {
 476                         DLOG("workspace name to: %s\n", $<string>5);
 477 #if 0
 478                         if ($<string>5 != NULL) {
 479                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 480                                 free($<string>5);
 481                         }
 482 #endif
 483                 }
 484         }
 485         ;
 486
 487 optional_workspace_name:
 488         /* empty */                     { $<string>$ = NULL; }
 489         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 490         ;
 491
 492 workspace_name:
 493         QUOTEDSTRING         { $<string>$ = $<string>1; }
 494         | STR                { $<string>$ = $<string>1; }
 495         | WORD               { $<string>$ = $<string>1; }
 496         ;
 497
 498 assign:
 499         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 500         {
 501 #if 0
 502                 printf("assignment of %s\n", $<string>3);
 503
 504                 struct Assignment *new = $<assignment>6;
 505                 printf("  to %d\n", new->workspace);
 506                 printf("  floating = %d\n", new->floating);
 507                 new->windowclass_title = $<string>3;
 508                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 509 #endif
 510         }
 511         ;
 512
 513 assign_target:
 514         NUMBER
 515         {
 516 #if 0
 517                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 518                 new->workspace = $<number>1;
 519                 new->floating = ASSIGN_FLOATING_NO;
 520                 $<assignment>$ = new;
 521 #endif
 522         }
 523         | '~'
 524         {
 525 #if 0
 526                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 527                 new->floating = ASSIGN_FLOATING_ONLY;
 528                 $<assignment>$ = new;
 529 #endif
 530         }
 531         | '~' NUMBER
 532         {
 533 #if 0
 534                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 535                 new->workspace = $<number>2;
 536                 new->floating = ASSIGN_FLOATING;
 537                 $<assignment>$ = new;
 538 #endif
 539         }
 540         ;
 541
 542 window_class:
 543         QUOTEDSTRING
 544         | STR_NG
 545         ;
 546
 547 optional_arrow:
 548         /* NULL */
 549         | TOKARROW WHITESPACE
 550         ;
 551
 552 ipcsocket:
 553         TOKIPCSOCKET WHITESPACE STR
 554         {
 555                 config.ipc_socket_path = $<string>3;
 556         }
 557         ;
 558
 559 restart_state:
 560         TOKRESTARTSTATE WHITESPACE STR
 561         {
 562                 config.restart_state_path = $<string>3;
 563         }
 564         ;
 565
 566 exec:
 567         TOKEXEC WHITESPACE STR
 568         {
 569                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 570                 new->command = $<string>3;
 571                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 572         }
 573         ;
 574
 575 terminal:
 576         TOKTERMINAL WHITESPACE STR
 577         {
 578                 ELOG("The terminal option is DEPRECATED and has no effect. "
 579                     "Please remove it from your configuration file.\n");
 580         }
 581         ;
 582
 583 font:
 584         TOKFONT WHITESPACE STR
 585         {
 586                 config.font = $<string>3;
 587                 printf("font %s\n", config.font);
 588         }
 589         ;
 590
 591 single_color:
 592         TOKSINGLECOLOR WHITESPACE colorpixel
 593         {
 594                 uint32_t *dest = $<single_color>1;
 595                 *dest = $<number>3;
 596         }
 597         ;
 598
 599 color:
 600         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 601         {
 602                 struct Colortriple *dest = $<color>1;
 603
 604                 dest->border = $<number>3;
 605                 dest->background = $<number>5;
 606                 dest->text = $<number>7;
 607         }
 608         ;
 609
 610 colorpixel:
 611         '#' HEX
 612         {
 613                 char *hex;
 614                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 615                         die("asprintf()");
 616                 $<number>$ = get_colorpixel(hex);
 617                 free(hex);
 618         }
 619         ;
 620
 621
 622 binding_modifiers:
 623         /* NULL */                               { $<number>$ = 0; }
 624         | binding_modifier
 625         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 626         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 627         ;
 628
 629 binding_modifier:
 630         MODIFIER        { $<number>$ = $<number>1; }
 631         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 632         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 633         ;