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