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         uint32_t *single_color;
 201         struct Colortriple *color;
 202         struct Assignment *assignment;
 203         struct Binding *binding;
 204 }
 205
 206 %token <number>NUMBER "<number>"
 207 %token <string>WORD "<word>"
 208 %token <string>STR "<string>"
 209 %token <string>STR_NG "<string (non-greedy)>"
 210 %token <string>HEX "<hex>"
 211 %token <string>OUTPUT "<RandR output>"
 212 %token TOKBIND
 213 %token TOKTERMINAL
 214 %token TOKCOMMENT "<comment>"
 215 %token TOKFONT "font"
 216 %token TOKBINDSYM "bindsym"
 217 %token MODIFIER "<modifier>"
 218 %token TOKCONTROL "control"
 219 %token TOKSHIFT "shift"
 220 %token WHITESPACE "<whitespace>"
 221 %token TOKFLOATING_MODIFIER "floating_modifier"
 222 %token QUOTEDSTRING "<quoted string>"
 223 %token TOKWORKSPACE "workspace"
 224 %token TOKOUTPUT "output"
 225 %token TOKASSIGN "assign"
 226 %token TOKSET
 227 %token TOKIPCSOCKET "ipc_socket"
 228 %token TOKEXEC "exec"
 229 %token TOKSINGLECOLOR
 230 %token TOKCOLOR
 231 %token TOKARROW "→"
 232 %token TOKMODE "mode"
 233 %token TOKNEWCONTAINER "new_container"
 234 %token TOKNEWWINDOW "new_window"
 235 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 236 %token TOKWORKSPACEBAR "workspace_bar"
 237 %token TOKCONTAINERMODE "default/stacking/tabbed"
 238 %token TOKSTACKLIMIT "stack-limit"
 239
 240 %%
 241
 242 lines: /* empty */
 243         | lines WHITESPACE line
 244         | lines error
 245         | lines line
 246         ;
 247
 248 line:
 249         bindline
 250         | mode
 251         | floating_modifier
 252         | new_container
 253         | new_window
 254         | focus_follows_mouse
 255         | workspace_bar
 256         | workspace
 257         | assign
 258         | ipcsocket
 259         | exec
 260         | single_color
 261         | color
 262         | terminal
 263         | font
 264         | comment
 265         ;
 266
 267 comment:
 268         TOKCOMMENT
 269         ;
 270
 271 command:
 272         STR
 273         ;
 274
 275 bindline:
 276         binding
 277         {
 278                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 279         }
 280         ;
 281
 282 binding:
 283         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 284         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 285         ;
 286
 287 bind:
 288         binding_modifiers NUMBER WHITESPACE command
 289         {
 290                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 291                 Binding *new = scalloc(sizeof(Binding));
 292
 293                 new->keycode = $<number>2;
 294                 new->mods = $<number>1;
 295                 new->command = $<string>4;
 296
 297                 $<binding>$ = new;
 298         }
 299         ;
 300
 301 bindsym:
 302         binding_modifiers word_or_number WHITESPACE command
 303         {
 304                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 305                 Binding *new = scalloc(sizeof(Binding));
 306
 307                 new->symbol = $<string>2;
 308                 new->mods = $<number>1;
 309                 new->command = $<string>4;
 310
 311                 $<binding>$ = new;
 312         }
 313         ;
 314
 315 word_or_number:
 316         WORD
 317         | NUMBER
 318         {
 319                 asprintf(&$<string>$, "%d", $1);
 320         }
 321         ;
 322
 323 mode:
 324         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 325         {
 326                 if (strcasecmp($<string>3, "default") == 0) {
 327                         printf("You cannot use the name \"default\" for your mode\n");
 328                         exit(1);
 329                 }
 330                 printf("\t now in mode %s\n", $<string>3);
 331                 printf("\t current bindings = %p\n", current_bindings);
 332                 Binding *binding;
 333                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 334                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 335                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 336                 }
 337
 338                 struct Mode *mode = scalloc(sizeof(struct Mode));
 339                 mode->name = $<string>3;
 340                 mode->bindings = current_bindings;
 341                 current_bindings = NULL;
 342                 SLIST_INSERT_HEAD(&modes, mode, modes);
 343         }
 344         ;
 345
 346
 347 modelines:
 348         /* empty */
 349         | modelines modeline
 350         ;
 351
 352 modeline:
 353         WHITESPACE
 354         | comment
 355         | binding
 356         {
 357                 if (current_bindings == NULL) {
 358                         current_bindings = scalloc(sizeof(struct bindings_head));
 359                         TAILQ_INIT(current_bindings);
 360                 }
 361
 362                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 363         }
 364         ;
 365
 366 floating_modifier:
 367         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 368         {
 369                 DLOG("floating modifier = %d\n", $<number>3);
 370                 config.floating_modifier = $<number>3;
 371         }
 372         ;
 373
 374 new_container:
 375         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 376         {
 377                 DLOG("new containers will be in mode %d\n", $<number>3);
 378                 config.container_mode = $<number>3;
 379
 380                 /* We also need to change the layout of the already existing
 381                  * workspaces here. Workspaces may exist at this point because
 382                  * of the other directives which are modifying workspaces
 383                  * (setting the preferred screen or name). While the workspace
 384                  * objects are already created, they have never been used.
 385                  * Thus, the user very likely awaits the default container mode
 386                  * to trigger in this case, regardless of where it is inside
 387                  * his configuration file. */
 388                 Workspace *ws;
 389                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 390                         if (ws->table == NULL)
 391                                 continue;
 392                         switch_layout_mode(global_conn,
 393                                            ws->table[0][0],
 394                                            config.container_mode);
 395                 }
 396         }
 397         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 398         {
 399                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 400                 config.container_stack_limit = $<number>5;
 401                 config.container_stack_limit_value = $<number>7;
 402
 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         }
 413         ;
 414
 415 new_window:
 416         TOKNEWWINDOW WHITESPACE WORD
 417         {
 418                 DLOG("new windows should start in mode %s\n", $<string>3);
 419                 config.default_border = sstrdup($<string>3);
 420         }
 421         ;
 422
 423 bool:
 424         NUMBER
 425         {
 426                 $<number>$ = ($<number>1 == 1);
 427         }
 428         | WORD
 429         {
 430                 DLOG("checking word \"%s\"\n", $<string>1);
 431                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 432                               strcasecmp($<string>1, "true") == 0 ||
 433                               strcasecmp($<string>1, "on") == 0 ||
 434                               strcasecmp($<string>1, "enable") == 0 ||
 435                               strcasecmp($<string>1, "active") == 0);
 436         }
 437         ;
 438
 439 focus_follows_mouse:
 440         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 441         {
 442                 DLOG("focus follows mouse = %d\n", $<number>3);
 443                 config.disable_focus_follows_mouse = !($<number>3);
 444         }
 445         ;
 446
 447 workspace_bar:
 448         TOKWORKSPACEBAR WHITESPACE bool
 449         {
 450                 DLOG("workspace bar = %d\n", $<number>3);
 451                 config.disable_workspace_bar = !($<number>3);
 452         }
 453         ;
 454
 455 workspace:
 456         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 457         {
 458                 int ws_num = $<number>3;
 459                 if (ws_num < 1) {
 460                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 461                 } else {
 462                         Workspace *ws = workspace_get(ws_num - 1);
 463                         ws->preferred_output = $<string>7;
 464                         if ($<string>8 != NULL) {
 465                                 workspace_set_name(ws, $<string>8);
 466                                 free($<string>8);
 467                         }
 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", $<string>5);
 477                         if ($<string>5 != NULL) {
 478                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 479                                 free($<string>5);
 480                         }
 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                 DLOG("assignment of %s\n", $<string>3);
 500
 501                 struct Assignment *new = $<assignment>6;
 502                 if (new->floating != ASSIGN_FLOATING_ONLY && new->workspace < 1) {
 503                         DLOG("Invalid client assignment, workspace number %d out of range\n", new->workspace);
 504                         free(new);
 505                 } else {
 506                         DLOG("  to %d\n", new->workspace);
 507                         DLOG("  floating = %d\n", new->floating);
 508                         new->windowclass_title = $<string>3;
 509                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 510                 }
 511         }
 512         ;
 513
 514 assign_target:
 515         NUMBER
 516         {
 517                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 518                 new->workspace = $<number>1;
 519                 new->floating = ASSIGN_FLOATING_NO;
 520                 $<assignment>$ = new;
 521         }
 522         | '~'
 523         {
 524                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 525                 new->floating = ASSIGN_FLOATING_ONLY;
 526                 $<assignment>$ = new;
 527         }
 528         | '~' NUMBER
 529         {
 530                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 531                 new->workspace = $<number>2;
 532                 new->floating = ASSIGN_FLOATING;
 533                 $<assignment>$ = new;
 534         }
 535         ;
 536
 537 window_class:
 538         QUOTEDSTRING
 539         | STR_NG
 540         ;
 541
 542 optional_arrow:
 543         /* NULL */
 544         | TOKARROW WHITESPACE
 545         ;
 546
 547 ipcsocket:
 548         TOKIPCSOCKET WHITESPACE STR
 549         {
 550                 config.ipc_socket_path = $<string>3;
 551         }
 552         ;
 553
 554 exec:
 555         TOKEXEC WHITESPACE STR
 556         {
 557                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 558                 new->command = $<string>3;
 559                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 560         }
 561         ;
 562
 563 terminal:
 564         TOKTERMINAL WHITESPACE STR
 565         {
 566                 ELOG("The terminal option is DEPRECATED and has no effect. "
 567                     "Please remove it from your configuration file.\n");
 568         }
 569         ;
 570
 571 font:
 572         TOKFONT WHITESPACE STR
 573         {
 574                 config.font = $<string>3;
 575                 printf("font %s\n", config.font);
 576         }
 577         ;
 578
 579 single_color:
 580         TOKSINGLECOLOR WHITESPACE colorpixel
 581         {
 582                 uint32_t *dest = $<single_color>1;
 583                 *dest = $<number>3;
 584         }
 585         ;
 586
 587 color:
 588         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 589         {
 590                 struct Colortriple *dest = $<color>1;
 591
 592                 dest->border = $<number>3;
 593                 dest->background = $<number>5;
 594                 dest->text = $<number>7;
 595         }
 596         ;
 597
 598 colorpixel:
 599         '#' HEX
 600         {
 601                 char *hex;
 602                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 603                         die("asprintf()");
 604                 $<number>$ = get_colorpixel(global_conn, hex);
 605                 free(hex);
 606         }
 607         ;
 608
 609
 610 binding_modifiers:
 611         /* NULL */                               { $<number>$ = 0; }
 612         | binding_modifier
 613         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 614         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 615         ;
 616
 617 binding_modifier:
 618         MODIFIER        { $<number>$ = $<number>1; }
 619         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 620         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 621         ;