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 }
 188
 189 %}
 190
 191 %expect 1
 192 %error-verbose
 193 %lex-param { struct context *context }
 194
 195 %union {
 196         int number;
 197         char *string;
 198         struct Colortriple *color;
 199         struct Assignment *assignment;
 200         struct Binding *binding;
 201 }
 202
 203 %token <number>NUMBER "<number>"
 204 %token <string>WORD "<word>"
 205 %token <string>STR "<string>"
 206 %token <string>STR_NG "<string (non-greedy)>"
 207 %token <string>HEX "<hex>"
 208 %token <string>OUTPUT "<RandR output>"
 209 %token TOKBIND
 210 %token TOKTERMINAL
 211 %token TOKCOMMENT "<comment>"
 212 %token TOKFONT "font"
 213 %token TOKBINDSYM "bindsym"
 214 %token MODIFIER "<modifier>"
 215 %token TOKCONTROL "control"
 216 %token TOKSHIFT "shift"
 217 %token WHITESPACE "<whitespace>"
 218 %token TOKFLOATING_MODIFIER "floating_modifier"
 219 %token QUOTEDSTRING "<quoted string>"
 220 %token TOKWORKSPACE "workspace"
 221 %token TOKOUTPUT "output"
 222 %token TOKASSIGN "assign"
 223 %token TOKSET
 224 %token TOKIPCSOCKET "ipc_socket"
 225 %token TOKEXEC "exec"
 226 %token TOKCOLOR
 227 %token TOKARROW "→"
 228 %token TOKMODE "mode"
 229 %token TOKNEWCONTAINER "new_container"
 230 %token TOKNEWWINDOW "new_window"
 231 %token TOKFOCUSFOLLOWSMOUSE "focus_follows_mouse"
 232 %token TOKWORKSPACEBAR "workspace_bar"
 233 %token TOKCONTAINERMODE "default/stacking/tabbed"
 234 %token TOKSTACKLIMIT "stack-limit"
 235
 236 %%
 237
 238 lines: /* empty */
 239         | lines WHITESPACE line
 240         | lines error
 241         | lines line
 242         ;
 243
 244 line:
 245         bindline
 246         | mode
 247         | floating_modifier
 248         | new_container
 249         | new_window
 250         | focus_follows_mouse
 251         | workspace_bar
 252         | workspace
 253         | assign
 254         | ipcsocket
 255         | exec
 256         | color
 257         | terminal
 258         | font
 259         | comment
 260         ;
 261
 262 comment:
 263         TOKCOMMENT
 264         ;
 265
 266 command:
 267         STR
 268         ;
 269
 270 bindline:
 271         binding
 272         {
 273                 TAILQ_INSERT_TAIL(bindings, $<binding>1, bindings);
 274         }
 275         ;
 276
 277 binding:
 278         TOKBIND WHITESPACE bind                 { $<binding>$ = $<binding>3; }
 279         | TOKBINDSYM WHITESPACE bindsym         { $<binding>$ = $<binding>3; }
 280         ;
 281
 282 bind:
 283         binding_modifiers NUMBER WHITESPACE command
 284         {
 285                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>1, $2, $<string>4);
 286                 Binding *new = scalloc(sizeof(Binding));
 287
 288                 new->keycode = $<number>2;
 289                 new->mods = $<number>1;
 290                 new->command = $<string>4;
 291
 292                 $<binding>$ = new;
 293         }
 294         ;
 295
 296 bindsym:
 297         binding_modifiers word_or_number WHITESPACE command
 298         {
 299                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>1, $<string>2, $<string>4);
 300                 Binding *new = scalloc(sizeof(Binding));
 301
 302                 new->symbol = $<string>2;
 303                 new->mods = $<number>1;
 304                 new->command = $<string>4;
 305
 306                 $<binding>$ = new;
 307         }
 308         ;
 309
 310 word_or_number:
 311         WORD
 312         | NUMBER
 313         {
 314                 asprintf(&$<string>$, "%d", $1);
 315         }
 316         ;
 317
 318 mode:
 319         TOKMODE WHITESPACE QUOTEDSTRING WHITESPACE '{' modelines '}'
 320         {
 321                 if (strcasecmp($<string>3, "default") == 0) {
 322                         printf("You cannot use the name \"default\" for your mode\n");
 323                         exit(1);
 324                 }
 325                 printf("\t now in mode %s\n", $<string>3);
 326                 printf("\t current bindings = %p\n", current_bindings);
 327                 Binding *binding;
 328                 TAILQ_FOREACH(binding, current_bindings, bindings) {
 329                         printf("got binding on mods %d, keycode %d, symbol %s, command %s\n",
 330                                         binding->mods, binding->keycode, binding->symbol, binding->command);
 331                 }
 332
 333                 struct Mode *mode = scalloc(sizeof(struct Mode));
 334                 mode->name = $<string>3;
 335                 mode->bindings = current_bindings;
 336                 current_bindings = NULL;
 337                 SLIST_INSERT_HEAD(&modes, mode, modes);
 338         }
 339         ;
 340
 341
 342 modelines:
 343         /* empty */
 344         | modelines modeline
 345         ;
 346
 347 modeline:
 348         WHITESPACE
 349         | comment
 350         | binding
 351         {
 352                 if (current_bindings == NULL) {
 353                         current_bindings = scalloc(sizeof(struct bindings_head));
 354                         TAILQ_INIT(current_bindings);
 355                 }
 356
 357                 TAILQ_INSERT_TAIL(current_bindings, $<binding>1, bindings);
 358         }
 359         ;
 360
 361 floating_modifier:
 362         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 363         {
 364                 DLOG("floating modifier = %d\n", $<number>3);
 365                 config.floating_modifier = $<number>3;
 366         }
 367         ;
 368
 369 new_container:
 370         TOKNEWCONTAINER WHITESPACE TOKCONTAINERMODE
 371         {
 372                 DLOG("new containers will be in mode %d\n", $<number>3);
 373                 config.container_mode = $<number>3;
 374
 375                 /* We also need to change the layout of the already existing
 376                  * workspaces here. Workspaces may exist at this point because
 377                  * of the other directives which are modifying workspaces
 378                  * (setting the preferred screen or name). While the workspace
 379                  * objects are already created, they have never been used.
 380                  * Thus, the user very likely awaits the default container mode
 381                  * to trigger in this case, regardless of where it is inside
 382                  * his configuration file. */
 383                 Workspace *ws;
 384                 TAILQ_FOREACH(ws, workspaces, workspaces) {
 385                         if (ws->table == NULL)
 386                                 continue;
 387                         switch_layout_mode(global_conn,
 388                                            ws->table[0][0],
 389                                            config.container_mode);
 390                 }
 391         }
 392         | TOKNEWCONTAINER WHITESPACE TOKSTACKLIMIT WHITESPACE TOKSTACKLIMIT WHITESPACE NUMBER
 393         {
 394                 DLOG("stack-limit %d with val %d\n", $<number>5, $<number>7);
 395                 config.container_stack_limit = $<number>5;
 396                 config.container_stack_limit_value = $<number>7;
 397
 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         }
 408         ;
 409
 410 new_window:
 411         TOKNEWWINDOW WHITESPACE WORD
 412         {
 413                 DLOG("new windows should start in mode %s\n", $<string>3);
 414                 config.default_border = sstrdup($<string>3);
 415         }
 416         ;
 417
 418 bool:
 419         NUMBER
 420         {
 421                 $<number>$ = ($<number>1 == 1);
 422         }
 423         | WORD
 424         {
 425                 DLOG("checking word \"%s\"\n", $<string>1);
 426                 $<number>$ = (strcasecmp($<string>1, "yes") == 0 ||
 427                               strcasecmp($<string>1, "true") == 0 ||
 428                               strcasecmp($<string>1, "on") == 0 ||
 429                               strcasecmp($<string>1, "enable") == 0 ||
 430                               strcasecmp($<string>1, "active") == 0);
 431         }
 432         ;
 433
 434 focus_follows_mouse:
 435         TOKFOCUSFOLLOWSMOUSE WHITESPACE bool
 436         {
 437                 DLOG("focus follows mouse = %d\n", $<number>3);
 438                 config.disable_focus_follows_mouse = !($<number>3);
 439         }
 440         ;
 441
 442 workspace_bar:
 443         TOKWORKSPACEBAR WHITESPACE bool
 444         {
 445                 DLOG("workspace bar = %d\n", $<number>3);
 446                 config.disable_workspace_bar = !($<number>3);
 447         }
 448         ;
 449
 450 workspace:
 451         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKOUTPUT WHITESPACE OUTPUT optional_workspace_name
 452         {
 453                 int ws_num = $<number>3;
 454                 if (ws_num < 1) {
 455                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 456                 } else {
 457                         Workspace *ws = workspace_get(ws_num - 1);
 458                         ws->preferred_output = $<string>7;
 459                         if ($<string>8 != NULL) {
 460                                 workspace_set_name(ws, $<string>8);
 461                                 free($<string>8);
 462                         }
 463                 }
 464         }
 465         | TOKWORKSPACE WHITESPACE NUMBER WHITESPACE workspace_name
 466         {
 467                 int ws_num = $<number>3;
 468                 if (ws_num < 1) {
 469                         DLOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 470                 } else {
 471                         DLOG("workspace name to: %s\n", $<string>5);
 472                         if ($<string>5 != NULL) {
 473                                 workspace_set_name(workspace_get(ws_num - 1), $<string>5);
 474                                 free($<string>5);
 475                         }
 476                 }
 477         }
 478         ;
 479
 480 optional_workspace_name:
 481         /* empty */                     { $<string>$ = NULL; }
 482         | WHITESPACE workspace_name     { $<string>$ = $<string>2; }
 483         ;
 484
 485 workspace_name:
 486         QUOTEDSTRING         { $<string>$ = $<string>1; }
 487         | STR                { $<string>$ = $<string>1; }
 488         | WORD               { $<string>$ = $<string>1; }
 489         ;
 490
 491 assign:
 492         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow assign_target
 493         {
 494                 printf("assignment of %s\n", $<string>3);
 495
 496                 struct Assignment *new = $<assignment>6;
 497                 printf("  to %d\n", new->workspace);
 498                 printf("  floating = %d\n", new->floating);
 499                 new->windowclass_title = $<string>3;
 500                 TAILQ_INSERT_TAIL(&assignments, new, assignments);
 501         }
 502         ;
 503
 504 assign_target:
 505         NUMBER
 506         {
 507                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 508                 new->workspace = $<number>1;
 509                 new->floating = ASSIGN_FLOATING_NO;
 510                 $<assignment>$ = new;
 511         }
 512         | '~'
 513         {
 514                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 515                 new->floating = ASSIGN_FLOATING_ONLY;
 516                 $<assignment>$ = new;
 517         }
 518         | '~' NUMBER
 519         {
 520                 struct Assignment *new = scalloc(sizeof(struct Assignment));
 521                 new->workspace = $<number>2;
 522                 new->floating = ASSIGN_FLOATING;
 523                 $<assignment>$ = new;
 524         }
 525         ;
 526
 527 window_class:
 528         QUOTEDSTRING
 529         | STR_NG
 530         ;
 531
 532 optional_arrow:
 533         /* NULL */
 534         | TOKARROW WHITESPACE
 535         ;
 536
 537 ipcsocket:
 538         TOKIPCSOCKET WHITESPACE STR
 539         {
 540                 config.ipc_socket_path = $<string>3;
 541         }
 542         ;
 543
 544 exec:
 545         TOKEXEC WHITESPACE STR
 546         {
 547                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 548                 new->command = $<string>3;
 549                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 550         }
 551         ;
 552
 553 terminal:
 554         TOKTERMINAL WHITESPACE STR
 555         {
 556                 ELOG("The terminal option is DEPRECATED and has no effect. "
 557                     "Please remove it from your configuration file.\n");
 558         }
 559         ;
 560
 561 font:
 562         TOKFONT WHITESPACE STR
 563         {
 564                 config.font = $<string>3;
 565                 printf("font %s\n", config.font);
 566         }
 567         ;
 568
 569
 570 color:
 571         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 572         {
 573                 struct Colortriple *dest = $<color>1;
 574
 575                 dest->border = $<number>3;
 576                 dest->background = $<number>5;
 577                 dest->text = $<number>7;
 578         }
 579         ;
 580
 581 colorpixel:
 582         '#' HEX
 583         {
 584                 char *hex;
 585                 if (asprintf(&hex, "#%s", $<string>2) == -1)
 586                         die("asprintf()");
 587                 $<number>$ = get_colorpixel(global_conn, hex);
 588                 free(hex);
 589         }
 590         ;
 591
 592
 593 binding_modifiers:
 594         /* NULL */                               { $<number>$ = 0; }
 595         | binding_modifier
 596         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 597         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 598         ;
 599
 600 binding_modifier:
 601         MODIFIER        { $<number>$ = $<number>1; }
 602         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 603         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 604         ;