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 TOKEXEC "exec"
 221 %token TOKSINGLECOLOR
 222 %token TOKCOLOR
 223 %token TOKARROW "→"
 224 %token TOKMODE "mode"
 225 %token TOKNEWCONTAINER "new_container"
 226 %token TOKNEWWINDOW "new_window"
 227 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 228 %token TOKWORKSPACEBAR "workspace_bar"
 229 %token TOKCONTAINERMODE "default/stacking/tabbed"
 230 %token TOKSTACKLIMIT "stack-limit"
 231
 232 %%
 233
 234 lines: /* empty */
 235         | lines WHITESPACE line
 236         | lines error
 237         | lines line
 238         ;
 239
 240 line:
 241         bindline
 242         | mode
 243         | floating_modifier
 244         | new_container
 245         | new_window
 246         | focus_follows_mouse
 247         | workspace_bar
 248         | workspace
 249         | assign
 250         | ipcsocket
 251         | exec
 252         | single_color
 253         | color
 254         | terminal
 255         | font
 256         | comment
 257         ;
 258
 259 comment:
 260         TOKCOMMENT
 261         ;
 262
 263 command:
 264         STR
 265         ;
 266
 267 bindline:
 268         binding
 269         {
 270                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 271         }
 272         ;
 273
 274 binding:
 275         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 276         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 277         ;
 278
 279 bind:
 280         binding_modifiers NUMBER WHITESPACE command
 281         {
 282                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 283                 Binding *new = scalloc(sizeof(Binding));
 284
 285                 new->keycode = $<number>2;
 286                 new->mods = $<number>1;
 287                 new->command = $<string>4;
 288
 289                 $<binding>$ = new;
 290         }
 291         ;
 292
 293 bindsym:
 294         binding_modifiers word_or_number WHITESPACE command
 295         {
 296                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 297                 Binding *new = scalloc(sizeof(Binding));
 298
 299                 new->symbol = $<string>2;
 300                 new->mods = $<number>1;
 301                 new->command = $<string>4;
 302
 303                 $<binding>$ = new;
 304         }
 305         ;
 306
 307 word_or_number:
 308         WORD
 309         | NUMBER
 310         {
 311                 asprintf(&$<string>$, "%d", $1);
 312         }
 313         ;
 314
 315 mode:
 316         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 317         {
 318                 if (strcasecmp($<string>3, "default") == 0) {
 319                         printf("You cannot use the name \"default\" for your mode\n");
 320                         exit(1);
 321                 }
 322                 printf("\t now in mode %s\n", $<string>3);
 323                 printf("\t current bindings = %p\n", current_bindings);
 324                 Binding *binding;
 325                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 326                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 327                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 328                 }
 329
 330                 struct Mode *mode = scalloc(sizeof(struct Mode));
 331                 mode->name = $<string>3;
 332                 mode->bindings = current_bindings;
 333                 current_bindings = NULL;
 334                 SLIST_INSERT_HEAD(&modes, mode, modes);
 335         }
 336         ;
 337
 338
 339 modelines:
 340         /* empty */
 341         | modelines modeline
 342         ;
 343
 344 modeline:
 345         WHITESPACE
 346         | comment
 347         | binding
 348         {
 349                 if (current_bindings == NULL) {
 350                         current_bindings = scalloc(sizeof(struct bindings_head));
 351                         TAILQ_INIT(current_bindings);
 352                 }
 353
 354                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 355         }
 356         ;
 357
 358 floating_modifier:
 359         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 360         {
 361                 DLOG("floating modifier = %d\n", $<number>3);
 362                 config.floating_modifier = $<number>3;
 363         }
 364         ;
 365
 366 new_container:
 367         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 368         {
 369                 DLOG("new containers will be in mode %d\n", $<number>3);
 370                 config.container_mode = $<number>3;
 371
 372 #if 0
 373                 /* We also need to change the layout of the already existing
 374                  * workspaces here. Workspaces may exist at this point because
 375                  * of the other directives which are modifying workspaces
 376                  * (setting the preferred screen or name). While the workspace
 377                  * objects are already created, they have never been used.
 378                  * Thus, the user very likely awaits the default container mode
 379                  * to trigger in this case, regardless of where it is inside
 380                  * his configuration file. */
 381                 Workspace *ws;
 382                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 383                         if (ws->table == NULL)
 384                                 continue;
 385                         switch_layout_mode(global_conn,
 386                                            ws->table[0][0],
 387                                            config.container_mode);
 388                 }
 389 #endif
 390         }
 391         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 392         {
 393                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 394                 config.container_stack_limit = $<number>5;
 395                 config.container_stack_limit_value = $<number>7;
 396
 397 #if 0
 398                 /* See the comment above */
 399                 Workspace *ws;
 400                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 401                         if (ws->table == NULL)
 402                                 continue;
 403                         Container *con = ws->table[0][0];
 404                         con->stack_limit = config.container_stack_limit;
 405                         con->stack_limit_value = config.container_stack_limit_value;
 406                 }
 407 #endif
 408         }
 409         ;
 410
 411 new_window:
 412         TOKNEWWINDOW WHITESPACE WORD
 413         {
 414                 DLOG("new windows should start in mode %s\n", $<string>3);
 415                 config.default_border = sstrdup($<string>3);
 416         }
 417         ;
 418
 419 bool:
 420         NUMBER
 421         {
 422                 $<number>$ = ($<number>1 == 1);
 423         }
 424         | WORD
 425         {
 426                 DLOG("checking word \"%s\"\n", $<string>1);
 427                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 428                               strcasecmp($<string>1, "true") == 0 ||
 429                               strcasecmp($<string>1, "on") == 0 ||
 430                               strcasecmp($<string>1, "enable") == 0 ||
 431                               strcasecmp($<string>1, "active") == 0);
 432         }
 433         ;
 434
 435 focus_follows_mouse:
 436         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 437         {
 438                 DLOG("focus follows mouse = %d\n", $<number>3);
 439                 config.disable_focus_follows_mouse = !($<number>3);
 440         }
 441         ;
 442
 443 workspace_bar:
 444         TOKWORKSPACEBAR WHITESPACE bool
 445         {
 446                 DLOG("workspace bar = %d\n", $<number>3);
 447                 config.disable_workspace_bar = !($<number>3);
 448         }
 449         ;
 450
 451 workspace:
 452         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 453         {
 454                 int ws_num = $<number>3;
 455                 if (ws_num < 1) {
 456                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 457                 } else {
 458 #if 0
 459                         Workspace *ws = workspace_get(ws_num - 1);
 460                         ws->preferred_output = $<string>7;
 461                         if ($<string>8 != NULL) {
 462                                 workspace_set_name(ws, $<string>8);
 463                                 free($<string>8);
 464                         }
 465 #endif
 466                 }
 467         }
 468         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 469         {
 470                 int ws_num = $<number>3;
 471                 if (ws_num < 1) {
 472                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 473                 } else {
 474                         DLOG("workspace name to: %s\n", $<string>5);
 475 #if 0
 476                         if ($<string>5 != NULL) {
 477                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 478                                 free($<string>5);
 479                         }
 480 #endif
 481                 }
 482         }
 483         ;
 484
 485 optional_workspace_name:
 486         /* empty */                     { $<string>$ = NULL; }
 487         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 488         ;
 489
 490 workspace_name:
 491         QUOTEDSTRING         { $<string>$ = $<string>1; }
 492         | STR                { $<string>$ = $<string>1; }
 493         | WORD               { $<string>$ = $<string>1; }
 494         ;
 495
 496 assign:
 497         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 498         {
 499 #if 0
 500                 printf("assignment of %s\n", $<string>3);
 501
 502                 struct Assignment *new = $<assignment>6;
 503                 printf("  to %d\n", new->workspace);
 504                 printf("  floating = %d\n", new->floating);
 505                 new->windowclass_title = $<string>3;
 506                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 507 #endif
 508         }
 509         ;
 510
 511 assign_target:
 512         NUMBER
 513         {
 514 #if 0
 515                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 516                 new->workspace = $<number>1;
 517                 new->floating = ASSIGN_FLOATING_NO;
 518                 $<assignment>$ = new;
 519 #endif
 520         }
 521         | '~'
 522         {
 523 #if 0
 524                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 525                 new->floating = ASSIGN_FLOATING_ONLY;
 526                 $<assignment>$ = new;
 527 #endif
 528         }
 529         | '~' NUMBER
 530         {
 531 #if 0
 532                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 533                 new->workspace = $<number>2;
 534                 new->floating = ASSIGN_FLOATING;
 535                 $<assignment>$ = new;
 536 #endif
 537         }
 538         ;
 539
 540 window_class:
 541         QUOTEDSTRING
 542         | STR_NG
 543         ;
 544
 545 optional_arrow:
 546         /* NULL */
 547         | TOKARROW WHITESPACE
 548         ;
 549
 550 ipcsocket:
 551         TOKIPCSOCKET WHITESPACE STR
 552         {
 553                 config.ipc_socket_path = $<string>3;
 554         }
 555         ;
 556
 557 exec:
 558         TOKEXEC WHITESPACE STR
 559         {
 560                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 561                 new->command = $<string>3;
 562                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 563         }
 564         ;
 565
 566 terminal:
 567         TOKTERMINAL WHITESPACE STR
 568         {
 569                 ELOG("The terminal option is DEPRECATED and has no effect. "
 570                     "Please remove it from your configuration file.\n");
 571         }
 572         ;
 573
 574 font:
 575         TOKFONT WHITESPACE STR
 576         {
 577                 config.font = $<string>3;
 578                 printf("font %s\n", config.font);
 579         }
 580         ;
 581
 582 single_color:
 583         TOKSINGLECOLOR WHITESPACE colorpixel
 584         {
 585                 uint32_t *dest = $<single_color>1;
 586                 *dest = $<number>3;
 587         }
 588         ;
 589
 590 color:
 591         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 592         {
 593                 struct Colortriple *dest = $<color>1;
 594
 595                 dest->border = $<number>3;
 596                 dest->background = $<number>5;
 597                 dest->text = $<number>7;
 598         }
 599         ;
 600
 601 colorpixel:
 602         '#' HEX
 603         {
 604                 char *hex;
 605                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 606                         die("asprintf()");
 607                 $<number>$ = get_colorpixel(hex);
 608                 free(hex);
 609         }
 610         ;
 611
 612
 613 binding_modifiers:
 614         /* NULL */                               { $<number>$ = 0; }
 615         | binding_modifier
 616         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 617         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 618         ;
 619
 620 binding_modifier:
 621         MODIFIER        { $<number>$ = $<number>1; }
 622         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 623         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 624         ;