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         SLIST_FOREACH(current, &variables, variables) {
 110                 int extra = (strlen(current->value) - strlen(current->key));
 111                 char *next;
 112                 for (next = buf;
 113                      (next = strcasestr(buf + (next - buf), current->key)) != NULL;
 114                      next += strlen(current->key))
 115                         extra_bytes += extra;
 116         }
 117
 118         /* Then, allocate a new buffer and copy the file over to the new one,
 119          * but replace occurences of our variables */
 120         char *walk = buf, *destwalk;
 121         char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
 122         destwalk = new;
 123         while (walk < (buf + stbuf.st_size)) {
 124                 /* Find the next variable */
 125                 SLIST_FOREACH(current, &variables, variables)
 126                         current->next_match = strcasestr(walk, current->key);
 127                 nearest = NULL;
 128                 int distance = stbuf.st_size;
 129                 SLIST_FOREACH(current, &variables, variables) {
 130                         if (current->next_match == NULL)
 131                                 continue;
 132                         if ((current->next_match - walk) < distance) {
 133                                 distance = (current->next_match - walk);
 134                                 nearest = current;
 135                         }
 136                 }
 137                 if (nearest == NULL) {
 138                         /* If there are no more variables, we just copy the rest */
 139                         strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
 140                         destwalk += (buf + stbuf.st_size) - walk;
 141                         *destwalk = '\0';
 142                         break;
 143                 } else {
 144                         /* Copy until the next variable, then copy its value */
 145                         strncpy(destwalk, walk, distance);
 146                         strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
 147                         walk += distance + strlen(nearest->key);
 148                         destwalk += distance + strlen(nearest->value);
 149                 }
 150         }
 151
 152         yy_scan_string(new);
 153
 154         context = scalloc(sizeof(struct context));
 155         context->filename = f;
 156
 157         if (yyparse() != 0) {
 158                 fprintf(stderr, "Could not parse configfile\n");
 159                 exit(1);
 160         }
 161
 162         FREE(context->line_copy);
 163         free(context);
 164         free(new);
 165         free(buf);
 166
 167         while (!SLIST_EMPTY(&variables)) {
 168                 current = SLIST_FIRST(&variables);
 169                 FREE(current->key);
 170                 FREE(current->value);
 171                 SLIST_REMOVE_HEAD(&variables, variables);
 172                 FREE(current);
 173         }
 174 }
 175
 176 %}
 177
 178 %expect 1
 179 %error-verbose
 180 %lex-param { struct context *context }
 181
 182 %union {
 183         int number;
 184         char *string;
 185         struct Colortriple *color;
 186         struct Assignment *assignment;
 187         struct Binding *binding;
 188 }
 189
 190 %token <number>NUMBER "<number>"
 191 %token <string>WORD "<word>"
 192 %token <string>STR "<string>"
 193 %token <string>STR_NG "<string (non-greedy)>"
 194 %token <string>HEX "<hex>"
 195 %token <string>OUTPUT "<RandR output>"
 196 %token TOKBIND
 197 %token TOKTERMINAL
 198 %token TOKCOMMENT "<comment>"
 199 %token TOKFONT "font"
 200 %token TOKBINDSYM "bindsym"
 201 %token MODIFIER "<modifier>"
 202 %token TOKCONTROL "control"
 203 %token TOKSHIFT "shift"
 204 %token WHITESPACE "<whitespace>"
 205 %token TOKFLOATING_MODIFIER "floating_modifier"
 206 %token QUOTEDSTRING "<quoted string>"
 207 %token TOKWORKSPACE "workspace"
 208 %token TOKOUTPUT "output"
 209 %token TOKASSIGN "assign"
 210 %token TOKSET
 211 %token TOKIPCSOCKET "ipc_socket"
 212 %token TOKEXEC "exec"
 213 %token TOKCOLOR
 214 %token TOKARROW "→"
 215 %token TOKMODE "mode"
 216 %token TOKNEWCONTAINER "new_container"
 217 %token TOKNEWWINDOW "new_window"
 218 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 219 %token TOKWORKSPACEBAR "workspace_bar"
 220 %token TOKCONTAINERMODE "default/stacking/tabbed"
 221 %token TOKSTACKLIMIT "stack-limit"
 222
 223 %%
 224
 225 lines: /* empty */
 226         | lines WHITESPACE line
 227         | lines error
 228         | lines line
 229         ;
 230
 231 line:
 232         bindline
 233         | mode
 234         | floating_modifier
 235         | new_container
 236         | new_window
 237         | focus_follows_mouse
 238         | workspace_bar
 239         | workspace
 240         | assign
 241         | ipcsocket
 242         | exec
 243         | color
 244         | terminal
 245         | font
 246         | comment
 247         ;
 248
 249 comment:
 250         TOKCOMMENT
 251         ;
 252
 253 command:
 254         STR
 255         ;
 256
 257 bindline:
 258         binding
 259         {
 260                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 261         }
 262         ;
 263
 264 binding:
 265         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 266         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 267         ;
 268
 269 bind:
 270         binding_modifiers NUMBER WHITESPACE command
 271         {
 272                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 273                 Binding *new = scalloc(sizeof(Binding));
 274
 275                 new->keycode = $<number>2;
 276                 new->mods = $<number>1;
 277                 new->command = $<string>4;
 278
 279                 $<binding>$ = new;
 280         }
 281         ;
 282
 283 bindsym:
 284         binding_modifiers word_or_number WHITESPACE command
 285         {
 286                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 287                 Binding *new = scalloc(sizeof(Binding));
 288
 289                 new->symbol = $<string>2;
 290                 new->mods = $<number>1;
 291                 new->command = $<string>4;
 292
 293                 $<binding>$ = new;
 294         }
 295         ;
 296
 297 word_or_number:
 298         WORD
 299         | NUMBER
 300         {
 301                 asprintf(&$<string>$, "%d", $1);
 302         }
 303         ;
 304
 305 mode:
 306         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 307         {
 308                 if (strcasecmp($<string>3, "default") == 0) {
 309                         printf("You cannot use the name \"default\" for your mode\n");
 310                         exit(1);
 311                 }
 312                 printf("\t now in mode %s\n", $<string>3);
 313                 printf("\t current bindings = %p\n", current_bindings);
 314                 Binding *binding;
 315                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 316                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 317                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 318                 }
 319
 320                 struct Mode *mode = scalloc(sizeof(struct Mode));
 321                 mode->name = $<string>3;
 322                 mode->bindings = current_bindings;
 323                 current_bindings = NULL;
 324                 SLIST_INSERT_HEAD(&modes, mode, modes);
 325         }
 326         ;
 327
 328
 329 modelines:
 330         /* empty */
 331         | modelines modeline
 332         ;
 333
 334 modeline:
 335         WHITESPACE
 336         | comment
 337         | binding
 338         {
 339                 if (current_bindings == NULL) {
 340                         current_bindings = scalloc(sizeof(struct bindings_head));
 341                         TAILQ_INIT(current_bindings);
 342                 }
 343
 344                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 345         }
 346         ;
 347
 348 floating_modifier:
 349         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 350         {
 351                 DLOG("floating modifier = %d\n", $<number>3);
 352                 config.floating_modifier = $<number>3;
 353         }
 354         ;
 355
 356 new_container:
 357         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 358         {
 359                 DLOG("new containers will be in mode %d\n", $<number>3);
 360                 config.container_mode = $<number>3;
 361
 362 #if 0
 363                 /* We also need to change the layout of the already existing
 364                  * workspaces here. Workspaces may exist at this point because
 365                  * of the other directives which are modifying workspaces
 366                  * (setting the preferred screen or name). While the workspace
 367                  * objects are already created, they have never been used.
 368                  * Thus, the user very likely awaits the default container mode
 369                  * to trigger in this case, regardless of where it is inside
 370                  * his configuration file. */
 371                 Workspace *ws;
 372                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 373                         if (ws->table == NULL)
 374                                 continue;
 375                         switch_layout_mode(global_conn,
 376                                            ws->table[0][0],
 377                                            config.container_mode);
 378                 }
 379 #endif
 380         }
 381         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 382         {
 383                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 384                 config.container_stack_limit = $<number>5;
 385                 config.container_stack_limit_value = $<number>7;
 386
 387 #if 0
 388                 /* See the comment above */
 389                 Workspace *ws;
 390                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 391                         if (ws->table == NULL)
 392                                 continue;
 393                         Container *con = ws->table[0][0];
 394                         con->stack_limit = config.container_stack_limit;
 395                         con->stack_limit_value = config.container_stack_limit_value;
 396                 }
 397 #endif
 398         }
 399         ;
 400
 401 new_window:
 402         TOKNEWWINDOW WHITESPACE WORD
 403         {
 404                 DLOG("new windows should start in mode %s\n", $<string>3);
 405                 config.default_border = sstrdup($<string>3);
 406         }
 407         ;
 408
 409 bool:
 410         NUMBER
 411         {
 412                 $<number>$ = ($<number>1 == 1);
 413         }
 414         | WORD
 415         {
 416                 DLOG("checking word \"%s\"\n", $<string>1);
 417                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 418                               strcasecmp($<string>1, "true") == 0 ||
 419                               strcasecmp($<string>1, "on") == 0 ||
 420                               strcasecmp($<string>1, "enable") == 0 ||
 421                               strcasecmp($<string>1, "active") == 0);
 422         }
 423         ;
 424
 425 focus_follows_mouse:
 426         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 427         {
 428                 DLOG("focus follows mouse = %d\n", $<number>3);
 429                 config.disable_focus_follows_mouse = !($<number>3);
 430         }
 431         ;
 432
 433 workspace_bar:
 434         TOKWORKSPACEBAR WHITESPACE bool
 435         {
 436                 DLOG("workspace bar = %d\n", $<number>3);
 437                 config.disable_workspace_bar = !($<number>3);
 438         }
 439         ;
 440
 441 workspace:
 442         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 443         {
 444                 int ws_num = $<number>3;
 445                 if (ws_num < 1) {
 446                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 447                 } else {
 448 #if 0
 449                         Workspace *ws = workspace_get(ws_num - 1);
 450                         ws->preferred_output = $<string>7;
 451                         if ($<string>8 != NULL) {
 452                                 workspace_set_name(ws, $<string>8);
 453                                 free($<string>8);
 454                         }
 455 #endif
 456                 }
 457         }
 458         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 459         {
 460                 int ws_num = $<number>3;
 461                 if (ws_num < 1) {
 462                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 463                 } else {
 464                         DLOG("workspace name to: %s\n", $<string>5);
 465 #if 0
 466                         if ($<string>5 != NULL) {
 467                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 468                                 free($<string>5);
 469                         }
 470 #endif
 471                 }
 472         }
 473         ;
 474
 475 optional_workspace_name:
 476         /* empty */                     { $<string>$ = NULL; }
 477         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 478         ;
 479
 480 workspace_name:
 481         QUOTEDSTRING         { $<string>$ = $<string>1; }
 482         | STR                { $<string>$ = $<string>1; }
 483         | WORD               { $<string>$ = $<string>1; }
 484         ;
 485
 486 assign:
 487         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 488         {
 489                 printf("assignment of %s\n", $<string>3);
 490
 491                 struct Assignment *new = $<assignment>6;
 492                 printf("  to %d\n", new->workspace);
 493                 printf("  floating = %d\n", new->floating);
 494                 new->windowclass_title = $<string>3;
 495                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 496         }
 497         ;
 498
 499 assign_target:
 500         NUMBER
 501         {
 502                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 503                 new->workspace = $<number>1;
 504                 new->floating = ASSIGN_FLOATING_NO;
 505                 $<assignment>$ = new;
 506         }
 507         | '~'
 508         {
 509                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 510                 new->floating = ASSIGN_FLOATING_ONLY;
 511                 $<assignment>$ = new;
 512         }
 513         | '~' NUMBER
 514         {
 515                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 516                 new->workspace = $<number>2;
 517                 new->floating = ASSIGN_FLOATING;
 518                 $<assignment>$ = new;
 519         }
 520         ;
 521
 522 window_class:
 523         QUOTEDSTRING
 524         | STR_NG
 525         ;
 526
 527 optional_arrow:
 528         /* NULL */
 529         | TOKARROW WHITESPACE
 530         ;
 531
 532 ipcsocket:
 533         TOKIPCSOCKET WHITESPACE STR
 534         {
 535                 config.ipc_socket_path = $<string>3;
 536         }
 537         ;
 538
 539 exec:
 540         TOKEXEC WHITESPACE STR
 541         {
 542                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 543                 new->command = $<string>3;
 544                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 545         }
 546         ;
 547
 548 terminal:
 549         TOKTERMINAL WHITESPACE STR
 550         {
 551                 ELOG("The terminal option is DEPRECATED and has no effect. "
 552                     "Please remove it from your configuration file.\n");
 553         }
 554         ;
 555
 556 font:
 557         TOKFONT WHITESPACE STR
 558         {
 559                 config.font = $<string>3;
 560                 printf("font %s\n", config.font);
 561         }
 562         ;
 563
 564
 565 color:
 566         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 567         {
 568                 struct Colortriple *dest = $<color>1;
 569
 570                 dest->border = $<number>3;
 571                 dest->background = $<number>5;
 572                 dest->text = $<number>7;
 573         }
 574         ;
 575
 576 colorpixel:
 577         '#' HEX
 578         {
 579                 char *hex;
 580                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 581                         die("asprintf()");
 582                 $<number>$ = get_colorpixel(hex);
 583                 free(hex);
 584         }
 585         ;
 586
 587
 588 binding_modifiers:
 589         /* NULL */                               { $<number>$ = 0; }
 590         | binding_modifier
 591         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 592         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 593         ;
 594
 595 binding_modifier:
 596         MODIFIER        { $<number>$ = $<number>1; }
 597         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 598         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 599         ;