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 #include "log.h"
  25
  26 typedef struct yy_buffer_state *YY_BUFFER_STATE;
  27 extern int yylex(struct context *context);
  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 static struct context *context;
  34
  35 /* We don’t need yydebug for now, as we got decent error messages using
  36  * yyerror(). Should you ever want to extend the parser, it might be handy
  37  * to just comment it in again, so it stays here. */
  38 //int yydebug = 1;
  39
  40 void yyerror(const char *error_message) {
  41         ELOG("\n");
  42         ELOG("CONFIG: %s\n", error_message);
  43         ELOG("CONFIG: in file \"%s\", line %d:\n",
  44                 context->filename, context->line_number);
  45         ELOG("CONFIG:   %s\n", context->line_copy);
  46         ELOG("CONFIG:   ");
  47         for (int c = 1; c <= context->last_column; c++)
  48                 if (c >= context->first_column)
  49                         printf("^");
  50                 else printf(" ");
  51         printf("\n");
  52         ELOG("\n");
  53 }
  54
  55 int yywrap() {
  56         return 1;
  57 }
  58
  59 void parse_file(const char *f) {
  60         SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
  61         int fd, ret, read_bytes = 0;
  62         struct stat stbuf;
  63         char *buf;
  64         FILE *fstr;
  65         char buffer[1026], key[512], value[512];
  66
  67         if ((fd = open(f, O_RDONLY)) == -1)
  68                 die("Could not open configuration file: %s\n", strerror(errno));
  69
  70         if (fstat(fd, &stbuf) == -1)
  71                 die("Could not fstat file: %s\n", strerror(errno));
  72
  73         buf = scalloc((stbuf.st_size + 1) * sizeof(char));
  74         while (read_bytes < stbuf.st_size) {
  75                 if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
  76                         die("Could not read(): %s\n", strerror(errno));
  77                 read_bytes += ret;
  78         }
  79
  80         if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
  81                 die("Could not lseek: %s\n", strerror(errno));
  82
  83         if ((fstr = fdopen(fd, "r")) == NULL)
  84                 die("Could not fdopen: %s\n", strerror(errno));
  85
  86         while (!feof(fstr)) {
  87                 if (fgets(buffer, 1024, fstr) == NULL) {
  88                         if (feof(fstr))
  89                                 break;
  90                         die("Could not read configuration file\n");
  91                 }
  92
  93                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
  94                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
  95                     key[0] == '#' || strlen(key) < 3)
  96                         continue;
  97
  98                 if (strcasecmp(key, "set") == 0) {
  99                         if (value[0] != '$')
 100                                 die("Malformed variable assignment, name has to start with $\n");
 101
 102                         /* get key/value for this variable */
 103                         char *v_key = value, *v_value;
 104                         if ((v_value = strstr(value, " ")) == NULL)
 105                                 die("Malformed variable assignment, need a value\n");
 106
 107                         *(v_value++) = '\0';
 108
 109                         struct Variable *new = scalloc(sizeof(struct Variable));
 110                         new->key = sstrdup(v_key);
 111                         new->value = sstrdup(v_value);
 112                         SLIST_INSERT_HEAD(&variables, new, variables);
 113                         DLOG("Got new variable %s = %s\n", v_key, v_value);
 114                         continue;
 115                 }
 116         }
 117
 118         /* For every custom variable, see how often it occurs in the file and
 119          * how much extra bytes it requires when replaced. */
 120         struct Variable *current, *nearest;
 121         int extra_bytes = 0;
 122         SLIST_FOREACH(current, &variables, variables) {
 123                 int extra = (strlen(current->value) - strlen(current->key));
 124                 char *next;
 125                 for (next = buf;
 126                      (next = strcasestr(buf + (next - buf), current->key)) != NULL;
 127                      next += strlen(current->key))
 128                         extra_bytes += extra;
 129         }
 130
 131         /* Then, allocate a new buffer and copy the file over to the new one,
 132          * but replace occurences of our variables */
 133         char *walk = buf, *destwalk;
 134         char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
 135         destwalk = new;
 136         while (walk < (buf + stbuf.st_size)) {
 137                 /* Find the next variable */
 138                 SLIST_FOREACH(current, &variables, variables)
 139                         current->next_match = strcasestr(walk, current->key);
 140                 nearest = NULL;
 141                 int distance = stbuf.st_size;
 142                 SLIST_FOREACH(current, &variables, variables) {
 143                         if (current->next_match == NULL)
 144                                 continue;
 145                         if ((current->next_match - walk) < distance) {
 146                                 distance = (current->next_match - walk);
 147                                 nearest = current;
 148                         }
 149                 }
 150                 if (nearest == NULL) {
 151                         /* If there are no more variables, we just copy the rest */
 152                         strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
 153                         destwalk += (buf + stbuf.st_size) - walk;
 154                         *destwalk = '\0';
 155                         break;
 156                 } else {
 157                         /* Copy until the next variable, then copy its value */
 158                         strncpy(destwalk, walk, distance);
 159                         strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
 160                         walk += distance + strlen(nearest->key);
 161                         destwalk += distance + strlen(nearest->value);
 162                 }
 163         }
 164
 165         yy_scan_string(new);
 166
 167         context = scalloc(sizeof(struct context));
 168         context->filename = f;
 169
 170         if (yyparse() != 0) {
 171                 fprintf(stderr, "Could not parse configfile\n");
 172                 exit(1);
 173         }
 174
 175         FREE(context->line_copy);
 176         free(context);
 177         free(new);
 178         free(buf);
 179
 180         while (!SLIST_EMPTY(&variables)) {
 181                 current = SLIST_FIRST(&variables);
 182                 FREE(current->key);
 183                 FREE(current->value);
 184                 SLIST_REMOVE_HEAD(&variables, variables);
 185                 FREE(current);
 186         }
 187         fclose(fstr);
 188         close(fd);
 189 }
 190
 191 %}
 192
 193 %expect 1
 194 %error-verbose
 195 %lex-param { struct context *context }
 196
 197 %union {
 198         int number;
 199         char *string;
 200         struct Colortriple *color;
 201         struct Assignment *assignment;
 202         struct Binding *binding;
 203 }
 204
 205 %token <number>NUMBER "<number>"
 206 %token <string>WORD "<word>"
 207 %token <string>STR "<string>"
 208 %token <string>STR_NG "<string (non-greedy)>"
 209 %token <string>HEX "<hex>"
 210 %token <string>OUTPUT "<RandR output>"
 211 %token TOKBIND
 212 %token TOKTERMINAL
 213 %token TOKCOMMENT "<comment>"
 214 %token TOKFONT "font"
 215 %token TOKBINDSYM "bindsym"
 216 %token MODIFIER "<modifier>"
 217 %token TOKCONTROL "control"
 218 %token TOKSHIFT "shift"
 219 %token WHITESPACE "<whitespace>"
 220 %token TOKFLOATING_MODIFIER "floating_modifier"
 221 %token QUOTEDSTRING "<quoted string>"
 222 %token TOKWORKSPACE "workspace"
 223 %token TOKOUTPUT "output"
 224 %token TOKASSIGN "assign"
 225 %token TOKSET
 226 %token TOKIPCSOCKET "ipc_socket"
 227 %token TOKEXEC "exec"
 228 %token TOKCOLOR
 229 %token TOKARROW "→"
 230 %token TOKMODE "mode"
 231 %token TOKNEWCONTAINER "new_container"
 232 %token TOKNEWWINDOW "new_window"
 233 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 234 %token TOKWORKSPACEBAR "workspace_bar"
 235 %token TOKCONTAINERMODE "default/stacking/tabbed"
 236 %token TOKSTACKLIMIT "stack-limit"
 237
 238 %%
 239
 240 lines: /* empty */
 241         | lines WHITESPACE line
 242         | lines error
 243         | lines line
 244         ;
 245
 246 line:
 247         bindline
 248         | mode
 249         | floating_modifier
 250         | new_container
 251         | new_window
 252         | focus_follows_mouse
 253         | workspace_bar
 254         | workspace
 255         | assign
 256         | ipcsocket
 257         | exec
 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                 /* We also need to change the layout of the already existing
 378                  * workspaces here. Workspaces may exist at this point because
 379                  * of the other directives which are modifying workspaces
 380                  * (setting the preferred screen or name). While the workspace
 381                  * objects are already created, they have never been used.
 382                  * Thus, the user very likely awaits the default container mode
 383                  * to trigger in this case, regardless of where it is inside
 384                  * his configuration file. */
 385                 Workspace *ws;
 386                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 387                         if (ws->table == NULL)
 388                                 continue;
 389                         switch_layout_mode(global_conn,
 390                                            ws->table[0][0],
 391                                            config.container_mode);
 392                 }
 393         }
 394         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 395         {
 396                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 397                 config.container_stack_limit = $<number>5;
 398                 config.container_stack_limit_value = $<number>7;
 399
 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         }
 410         ;
 411
 412 new_window:
 413         TOKNEWWINDOW WHITESPACE WORD
 414         {
 415                 DLOG("new windows should start in mode %s\n", $<string>3);
 416                 config.default_border = sstrdup($<string>3);
 417         }
 418         ;
 419
 420 bool:
 421         NUMBER
 422         {
 423                 $<number>$ = ($<number>1 == 1);
 424         }
 425         | WORD
 426         {
 427                 DLOG("checking word \"%s\"\n", $<string>1);
 428                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 429                               strcasecmp($<string>1, "true") == 0 ||
 430                               strcasecmp($<string>1, "on") == 0 ||
 431                               strcasecmp($<string>1, "enable") == 0 ||
 432                               strcasecmp($<string>1, "active") == 0);
 433         }
 434         ;
 435
 436 focus_follows_mouse:
 437         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 438         {
 439                 DLOG("focus follows mouse = %d\n", $<number>3);
 440                 config.disable_focus_follows_mouse = !($<number>3);
 441         }
 442         ;
 443
 444 workspace_bar:
 445         TOKWORKSPACEBAR WHITESPACE bool
 446         {
 447                 DLOG("workspace bar = %d\n", $<number>3);
 448                 config.disable_workspace_bar = !($<number>3);
 449         }
 450         ;
 451
 452 workspace:
 453         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 454         {
 455                 int ws_num = $<number>3;
 456                 if (ws_num < 1) {
 457                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 458                 } else {
 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                 }
 466         }
 467         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 468         {
 469                 int ws_num = $<number>3;
 470                 if (ws_num < 1) {
 471                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 472                 } else {
 473                         DLOG("workspace name to: %s\n", $<string>5);
 474                         if ($<string>5 != NULL) {
 475                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 476                                 free($<string>5);
 477                         }
 478                 }
 479         }
 480         ;
 481
 482 optional_workspace_name:
 483         /* empty */                     { $<string>$ = NULL; }
 484         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 485         ;
 486
 487 workspace_name:
 488         QUOTEDSTRING         { $<string>$ = $<string>1; }
 489         | STR                { $<string>$ = $<string>1; }
 490         | WORD               { $<string>$ = $<string>1; }
 491         ;
 492
 493 assign:
 494         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 495         {
 496                 printf("assignment of %s\n", $<string>3);
 497
 498                 struct Assignment *new = $<assignment>6;
 499                 printf("  to %d\n", new->workspace);
 500                 printf("  floating = %d\n", new->floating);
 501                 new->windowclass_title = $<string>3;
 502                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 503         }
 504         ;
 505
 506 assign_target:
 507         NUMBER
 508         {
 509                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 510                 new->workspace = $<number>1;
 511                 new->floating = ASSIGN_FLOATING_NO;
 512                 $<assignment>$ = new;
 513         }
 514         | '~'
 515         {
 516                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 517                 new->floating = ASSIGN_FLOATING_ONLY;
 518                 $<assignment>$ = new;
 519         }
 520         | '~' NUMBER
 521         {
 522                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 523                 new->workspace = $<number>2;
 524                 new->floating = ASSIGN_FLOATING;
 525                 $<assignment>$ = new;
 526         }
 527         ;
 528
 529 window_class:
 530         QUOTEDSTRING
 531         | STR_NG
 532         ;
 533
 534 optional_arrow:
 535         /* NULL */
 536         | TOKARROW WHITESPACE
 537         ;
 538
 539 ipcsocket:
 540         TOKIPCSOCKET WHITESPACE STR
 541         {
 542                 config.ipc_socket_path = $<string>3;
 543         }
 544         ;
 545
 546 exec:
 547         TOKEXEC WHITESPACE STR
 548         {
 549                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 550                 new->command = $<string>3;
 551                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 552         }
 553         ;
 554
 555 terminal:
 556         TOKTERMINAL WHITESPACE STR
 557         {
 558                 ELOG("The terminal option is DEPRECATED and has no effect. "
 559                     "Please remove it from your configuration file.\n");
 560         }
 561         ;
 562
 563 font:
 564         TOKFONT WHITESPACE STR
 565         {
 566                 config.font = $<string>3;
 567                 printf("font %s\n", config.font);
 568         }
 569         ;
 570
 571
 572 color:
 573         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 574         {
 575                 struct Colortriple *dest = $<color>1;
 576
 577                 dest->border = $<number>3;
 578                 dest->background = $<number>5;
 579                 dest->text = $<number>7;
 580         }
 581         ;
 582
 583 colorpixel:
 584         '#' HEX
 585         {
 586                 char *hex;
 587                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 588                         die("asprintf()");
 589                 $<number>$ = get_colorpixel(global_conn, hex);
 590                 free(hex);
 591         }
 592         ;
 593
 594
 595 binding_modifiers:
 596         /* NULL */                               { $<number>$ = 0; }
 597         | binding_modifier
 598         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 599         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 600         ;
 601
 602 binding_modifier:
 603         MODIFIER        { $<number>$ = $<number>1; }
 604         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 605         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 606         ;