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 TOK_NORMAL "normal"
 229 %token TOK_NONE "none"
 230 %token TOK_1PIXEL "1pixel"
 231 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 232 %token TOKWORKSPACEBAR "workspace_bar"
 233 %token TOKCONTAINERMODE "default/stacking/tabbed"
 234 %token TOKSTACKLIMIT "stack-limit"
 235
 236 %%
 237
 238 lines: /* empty */
 239         | lines WHITESPACE line
 240         | lines error
 241         | lines line
 242         ;
 243
 244 line:
 245         bindline
 246         | mode
 247         | floating_modifier
 248         | new_container
 249         | new_window
 250         | focus_follows_mouse
 251         | workspace_bar
 252         | workspace
 253         | assign
 254         | ipcsocket
 255         | restart_state
 256         | exec
 257         | single_color
 258         | color
 259         | terminal
 260         | font
 261         | comment
 262         ;
 263
 264 comment:
 265         TOKCOMMENT
 266         ;
 267
 268 command:
 269         STR
 270         ;
 271
 272 bindline:
 273         binding
 274         {
 275                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 276         }
 277         ;
 278
 279 binding:
 280         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 281         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 282         ;
 283
 284 bind:
 285         binding_modifiers NUMBER WHITESPACE command
 286         {
 287                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 288                 Binding *new = scalloc(sizeof(Binding));
 289
 290                 new->keycode = $<number>2;
 291                 new->mods = $<number>1;
 292                 new->command = $<string>4;
 293
 294                 $<binding>$ = new;
 295         }
 296         ;
 297
 298 bindsym:
 299         binding_modifiers word_or_number WHITESPACE command
 300         {
 301                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 302                 Binding *new = scalloc(sizeof(Binding));
 303
 304                 new->symbol = $<string>2;
 305                 new->mods = $<number>1;
 306                 new->command = $<string>4;
 307
 308                 $<binding>$ = new;
 309         }
 310         ;
 311
 312 word_or_number:
 313         WORD
 314         | NUMBER
 315         {
 316                 asprintf(&$<string>$, "%d", $1);
 317         }
 318         ;
 319
 320 mode:
 321         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 322         {
 323                 if (strcasecmp($<string>3, "default") == 0) {
 324                         printf("You cannot use the name \"default\" for your mode\n");
 325                         exit(1);
 326                 }
 327                 printf("\t now in mode %s\n", $<string>3);
 328                 printf("\t current bindings = %p\n", current_bindings);
 329                 Binding *binding;
 330                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 331                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 332                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 333                 }
 334
 335                 struct Mode *mode = scalloc(sizeof(struct Mode));
 336                 mode->name = $<string>3;
 337                 mode->bindings = current_bindings;
 338                 current_bindings = NULL;
 339                 SLIST_INSERT_HEAD(&modes, mode, modes);
 340         }
 341         ;
 342
 343
 344 modelines:
 345         /* empty */
 346         | modelines modeline
 347         ;
 348
 349 modeline:
 350         WHITESPACE
 351         | comment
 352         | binding
 353         {
 354                 if (current_bindings == NULL) {
 355                         current_bindings = scalloc(sizeof(struct bindings_head));
 356                         TAILQ_INIT(current_bindings);
 357                 }
 358
 359                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 360         }
 361         ;
 362
 363 floating_modifier:
 364         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 365         {
 366                 DLOG("floating modifier = %d\n", $<number>3);
 367                 config.floating_modifier = $<number>3;
 368         }
 369         ;
 370
 371 new_container:
 372         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 373         {
 374                 DLOG("new containers will be in mode %d\n", $<number>3);
 375                 config.container_mode = $<number>3;
 376
 377 #if 0
 378                 /* We also need to change the layout of the already existing
 379                  * workspaces here. Workspaces may exist at this point because
 380                  * of the other directives which are modifying workspaces
 381                  * (setting the preferred screen or name). While the workspace
 382                  * objects are already created, they have never been used.
 383                  * Thus, the user very likely awaits the default container mode
 384                  * to trigger in this case, regardless of where it is inside
 385                  * his configuration file. */
 386                 Workspace *ws;
 387                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 388                         if (ws->table == NULL)
 389                                 continue;
 390                         switch_layout_mode(global_conn,
 391                                            ws->table[0][0],
 392                                            config.container_mode);
 393                 }
 394 #endif
 395         }
 396         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 397         {
 398                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 399                 config.container_stack_limit = $<number>5;
 400                 config.container_stack_limit_value = $<number>7;
 401
 402 #if 0
 403                 /* See the comment above */
 404                 Workspace *ws;
 405                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 406                         if (ws->table == NULL)
 407                                 continue;
 408                         Container *con = ws->table[0][0];
 409                         con->stack_limit = config.container_stack_limit;
 410                         con->stack_limit_value = config.container_stack_limit_value;
 411                 }
 412 #endif
 413         }
 414         ;
 415
 416 new_window:
 417         TOKNEWWINDOW WHITESPACE border_style
 418         {
 419                 DLOG("new windows should start with border style %d\n", $<number>3);
 420                 config.default_border = $<number>3;
 421         }
 422         ;
 423
 424 border_style:
 425         TOK_NORMAL      { $<number>$ = BS_NORMAL; }
 426         | TOK_NONE      { $<number>$ = BS_NONE; }
 427         | TOK_1PIXEL    { $<number>$ = BS_1PIXEL; }
 428         ;
 429
 430 bool:
 431         NUMBER
 432         {
 433                 $<number>$ = ($<number>1 == 1);
 434         }
 435         | WORD
 436         {
 437                 DLOG("checking word \"%s\"\n", $<string>1);
 438                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 439                               strcasecmp($<string>1, "true") == 0 ||
 440                               strcasecmp($<string>1, "on") == 0 ||
 441                               strcasecmp($<string>1, "enable") == 0 ||
 442                               strcasecmp($<string>1, "active") == 0);
 443         }
 444         ;
 445
 446 focus_follows_mouse:
 447         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 448         {
 449                 DLOG("focus follows mouse = %d\n", $<number>3);
 450                 config.disable_focus_follows_mouse = !($<number>3);
 451         }
 452         ;
 453
 454 workspace_bar:
 455         TOKWORKSPACEBAR WHITESPACE bool
 456         {
 457                 DLOG("workspace bar = %d\n", $<number>3);
 458                 config.disable_workspace_bar = !($<number>3);
 459         }
 460         ;
 461
 462 workspace:
 463         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 464         {
 465                 int ws_num = $<number>3;
 466                 if (ws_num < 1) {
 467                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 468                 } else {
 469 #if 0
 470                         Workspace *ws = workspace_get(ws_num - 1);
 471                         ws->preferred_output = $<string>7;
 472                         if ($<string>8 != NULL) {
 473                                 workspace_set_name(ws, $<string>8);
 474                                 free($<string>8);
 475                         }
 476 #endif
 477                 }
 478         }
 479         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 480         {
 481                 int ws_num = $<number>3;
 482                 if (ws_num < 1) {
 483                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 484                 } else {
 485                         DLOG("workspace name to: %s\n", $<string>5);
 486 #if 0
 487                         if ($<string>5 != NULL) {
 488                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 489                                 free($<string>5);
 490                         }
 491 #endif
 492                 }
 493         }
 494         ;
 495
 496 optional_workspace_name:
 497         /* empty */                     { $<string>$ = NULL; }
 498         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 499         ;
 500
 501 workspace_name:
 502         QUOTEDSTRING         { $<string>$ = $<string>1; }
 503         | STR                { $<string>$ = $<string>1; }
 504         | WORD               { $<string>$ = $<string>1; }
 505         ;
 506
 507 assign:
 508         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 509         {
 510 #if 0
 511                 printf("assignment of %s\n", $<string>3);
 512
 513                 struct Assignment *new = $<assignment>6;
 514                 printf("  to %d\n", new->workspace);
 515                 printf("  floating = %d\n", new->floating);
 516                 new->windowclass_title = $<string>3;
 517                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 518 #endif
 519         }
 520         ;
 521
 522 assign_target:
 523         NUMBER
 524         {
 525 #if 0
 526                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 527                 new->workspace = $<number>1;
 528                 new->floating = ASSIGN_FLOATING_NO;
 529                 $<assignment>$ = new;
 530 #endif
 531         }
 532         | '~'
 533         {
 534 #if 0
 535                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 536                 new->floating = ASSIGN_FLOATING_ONLY;
 537                 $<assignment>$ = new;
 538 #endif
 539         }
 540         | '~' NUMBER
 541         {
 542 #if 0
 543                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 544                 new->workspace = $<number>2;
 545                 new->floating = ASSIGN_FLOATING;
 546                 $<assignment>$ = new;
 547 #endif
 548         }
 549         ;
 550
 551 window_class:
 552         QUOTEDSTRING
 553         | STR_NG
 554         ;
 555
 556 optional_arrow:
 557         /* NULL */
 558         | TOKARROW WHITESPACE
 559         ;
 560
 561 ipcsocket:
 562         TOKIPCSOCKET WHITESPACE STR
 563         {
 564                 config.ipc_socket_path = $<string>3;
 565         }
 566         ;
 567
 568 restart_state:
 569         TOKRESTARTSTATE WHITESPACE STR
 570         {
 571                 config.restart_state_path = $<string>3;
 572         }
 573         ;
 574
 575 exec:
 576         TOKEXEC WHITESPACE STR
 577         {
 578                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 579                 new->command = $<string>3;
 580                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 581         }
 582         ;
 583
 584 terminal:
 585         TOKTERMINAL WHITESPACE STR
 586         {
 587                 ELOG("The terminal option is DEPRECATED and has no effect. "
 588                     "Please remove it from your configuration file.\n");
 589         }
 590         ;
 591
 592 font:
 593         TOKFONT WHITESPACE STR
 594         {
 595                 config.font = $<string>3;
 596                 printf("font %s\n", config.font);
 597         }
 598         ;
 599
 600 single_color:
 601         TOKSINGLECOLOR WHITESPACE colorpixel
 602         {
 603                 uint32_t *dest = $<single_color>1;
 604                 *dest = $<number>3;
 605         }
 606         ;
 607
 608 color:
 609         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 610         {
 611                 struct Colortriple *dest = $<color>1;
 612
 613                 dest->border = $<number>3;
 614                 dest->background = $<number>5;
 615                 dest->text = $<number>7;
 616         }
 617         ;
 618
 619 colorpixel:
 620         '#' HEX
 621         {
 622                 char *hex;
 623                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 624                         die("asprintf()");
 625                 $<number>$ = get_colorpixel(hex);
 626                 free(hex);
 627         }
 628         ;
 629
 630
 631 binding_modifiers:
 632         /* NULL */                               { $<number>$ = 0; }
 633         | binding_modifier
 634         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 635         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 636         ;
 637
 638 binding_modifier:
 639         MODIFIER        { $<number>$ = $<number>1; }
 640         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 641         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 642         ;