git.sur5r.net Git - i3/i3/blob - src/cmdparse.y

   1 %{
   2 /*
   3  * vim:ts=4:sw=4:expandtab
   4  *
   5  * i3 - an improved dynamic tiling window manager
   6  * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
   7  *
   8  * cmdparse.y: the parser for commands you send to i3 (or bind on keys)
   9  *
  10
  11  */
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include <fcntl.h>
  16 #include <limits.h>
  17
  18 #include "all.h"
  19
  20 typedef struct yy_buffer_state *YY_BUFFER_STATE;
  21 extern int cmdyylex(struct context *context);
  22 extern int cmdyyparse(void);
  23 extern FILE *cmdyyin;
  24 YY_BUFFER_STATE cmdyy_scan_string(const char *);
  25
  26 static struct context *context;
  27 static Match current_match;
  28
  29 /*
  30  * Helper data structure for an operation window (window on which the operation
  31  * will be performed). Used to build the TAILQ owindows.
  32  *
  33  */
  34 typedef struct owindow {
  35     Con *con;
  36     TAILQ_ENTRY(owindow) owindows;
  37 } owindow;
  38 static TAILQ_HEAD(owindows_head, owindow) owindows;
  39
  40 /* Holds the JSON which will be returned via IPC or NULL for the default return
  41  * message */
  42 static char *json_output;
  43
  44 /* We don’t need yydebug for now, as we got decent error messages using
  45  * yyerror(). Should you ever want to extend the parser, it might be handy
  46  * to just comment it in again, so it stays here. */
  47 //int cmdyydebug = 1;
  48
  49 void cmdyyerror(const char *error_message) {
  50     ELOG("\n");
  51     ELOG("CMD: %s\n", error_message);
  52     ELOG("CMD: in command:\n");
  53     ELOG("CMD:   %s\n", context->line_copy);
  54     ELOG("CMD:   ");
  55     for (int c = 1; c <= context->last_column; c++)
  56         if (c >= context->first_column)
  57                 printf("^");
  58         else printf(" ");
  59     printf("\n");
  60     ELOG("\n");
  61     context->compact_error = sstrdup(error_message);
  62 }
  63
  64 int cmdyywrap() {
  65     return 1;
  66 }
  67
  68 char *parse_cmd(const char *new) {
  69     cmdyy_scan_string(new);
  70
  71     match_init(&current_match);
  72     context = scalloc(sizeof(struct context));
  73     context->filename = "cmd";
  74     FREE(json_output);
  75     if (cmdyyparse() != 0) {
  76         fprintf(stderr, "Could not parse command\n");
  77         asprintf(&json_output, "{\"success\":false, \"error\":\"%s at position %d\"}",
  78                  context->compact_error, context->first_column);
  79         FREE(context->line_copy);
  80         FREE(context->compact_error);
  81         free(context);
  82         return json_output;
  83     }
  84     printf("done, json output = %s\n", json_output);
  85
  86     FREE(context->line_copy);
  87     FREE(context->compact_error);
  88     free(context);
  89     return json_output;
  90 }
  91
  92 %}
  93
  94 %expect 4
  95 %error-verbose
  96 %lex-param { struct context *context }
  97
  98 %union {
  99     char *string;
 100     char chr;
 101     int number;
 102 }
 103
 104 %token TOK_ATTACH "attach"
 105 %token TOK_EXEC "exec"
 106 %token TOK_EXIT "exit"
 107 %token TOK_RELOAD "reload"
 108 %token TOK_RESTART "restart"
 109 %token TOK_KILL "kill"
 110 %token TOK_FULLSCREEN "fullscreen"
 111 %token TOK_GLOBAL "global"
 112 %token TOK_LAYOUT "layout"
 113 %token TOK_DEFAULT "default"
 114 %token TOK_STACKED "stacked"
 115 %token TOK_TABBED "tabbed"
 116 %token TOK_BORDER "border"
 117 %token TOK_NORMAL "normal"
 118 %token TOK_NONE "none"
 119 %token TOK_1PIXEL "1pixel"
 120 %token TOK_MODE "mode"
 121 %token TOK_TILING "tiling"
 122 %token TOK_FLOATING "floating"
 123 %token TOK_WORKSPACE "workspace"
 124 %token TOK_TOGGLE "toggle"
 125 %token TOK_FOCUS "focus"
 126 %token TOK_MOVE "move"
 127 %token TOK_OPEN "open"
 128 %token TOK_NEXT "next"
 129 %token TOK_PREV "prev"
 130 %token TOK_SPLIT "split"
 131 %token TOK_HORIZONTAL "horizontal"
 132 %token TOK_VERTICAL "vertical"
 133 %token TOK_LEVEL "level"
 134 %token TOK_UP "up"
 135 %token TOK_DOWN "down"
 136 %token TOK_LEFT "left"
 137 %token TOK_RIGHT "right"
 138 %token TOK_RESTORE "restore"
 139 %token TOK_MARK "mark"
 140 %token TOK_RESIZE "resize"
 141 %token TOK_GROW "grow"
 142 %token TOK_SHRINK "shrink"
 143 %token TOK_PX "px"
 144 %token TOK_OR "or"
 145 %token TOK_PPT "ppt"
 146 %token TOK_NOP "nop"
 147
 148 %token TOK_CLASS "class"
 149 %token TOK_ID "id"
 150 %token TOK_CON_ID "con_id"
 151
 152 %token WHITESPACE "<whitespace>"
 153 %token STR "<string>"
 154 %token NUMBER "<number>"
 155
 156 %%
 157
 158 commands:
 159     commands optwhitespace ';' optwhitespace command
 160     | command
 161     {
 162         owindow *current;
 163
 164         printf("single command completely parsed, dropping state...\n");
 165         while (!TAILQ_EMPTY(&owindows)) {
 166             current = TAILQ_FIRST(&owindows);
 167             TAILQ_REMOVE(&owindows, current, owindows);
 168             free(current);
 169         }
 170         match_init(&current_match);
 171     }
 172     ;
 173
 174 optwhitespace:
 175     | WHITESPACE
 176     ;
 177
 178 command:
 179     match optwhitespace operations
 180     ;
 181
 182 match:
 183     | matchstart optwhitespace criteria optwhitespace matchend
 184     {
 185         printf("match parsed\n");
 186     }
 187     ;
 188
 189 matchstart:
 190     '['
 191     {
 192         printf("start\n");
 193         match_init(&current_match);
 194         TAILQ_INIT(&owindows);
 195         /* copy all_cons */
 196         Con *con;
 197         TAILQ_FOREACH(con, &all_cons, all_cons) {
 198             owindow *ow = smalloc(sizeof(owindow));
 199             ow->con = con;
 200             TAILQ_INSERT_TAIL(&owindows, ow, owindows);
 201         }
 202     }
 203     ;
 204
 205 matchend:
 206     ']'
 207     {
 208         owindow *next, *current;
 209
 210         printf("match specification finished, matching...\n");
 211         /* copy the old list head to iterate through it and start with a fresh
 212          * list which will contain only matching windows */
 213         struct owindows_head old = owindows;
 214         TAILQ_INIT(&owindows);
 215         for (next = TAILQ_FIRST(&old); next != TAILQ_END(&old);) {
 216             /* make a copy of the next pointer and advance the pointer to the
 217              * next element as we are going to invalidate the element’s
 218              * next/prev pointers by calling TAILQ_INSERT_TAIL later */
 219             current = next;
 220             next = TAILQ_NEXT(next, owindows);
 221
 222             printf("checking if con %p / %s matches\n", current->con, current->con->name);
 223             if (current_match.con_id != NULL) {
 224                 if (current_match.con_id == current->con) {
 225                     printf("matches container!\n");
 226                     TAILQ_INSERT_TAIL(&owindows, current, owindows);
 227
 228                 }
 229             } else if (current_match.mark != NULL && current->con->mark != NULL &&
 230                     strcasecmp(current_match.mark, current->con->mark) == 0) {
 231                 printf("match by mark\n");
 232                     TAILQ_INSERT_TAIL(&owindows, current, owindows);
 233
 234             } else {
 235                 if (current->con->window == NULL)
 236                     continue;
 237                 if (match_matches_window(&current_match, current->con->window)) {
 238                     printf("matches window!\n");
 239                     TAILQ_INSERT_TAIL(&owindows, current, owindows);
 240                 } else {
 241                     printf("doesnt match\n");
 242                     free(current);
 243                 }
 244             }
 245         }
 246
 247         TAILQ_FOREACH(current, &owindows, owindows) {
 248             printf("matching: %p / %s\n", current->con, current->con->name);
 249         }
 250
 251     }
 252     ;
 253
 254 criteria:
 255     TOK_CLASS '=' STR
 256     {
 257         printf("criteria: class = %s\n", $<string>3);
 258         current_match.class = $<string>3;
 259     }
 260     | TOK_CON_ID '=' STR
 261     {
 262         printf("criteria: id = %s\n", $<string>3);
 263         char *end;
 264         long parsed = strtol($<string>3, &end, 10);
 265         if (parsed == LONG_MIN ||
 266             parsed == LONG_MAX ||
 267             parsed < 0 ||
 268             (end && *end != '\0')) {
 269             ELOG("Could not parse con id \"%s\"\n", $<string>3);
 270         } else {
 271             current_match.con_id = (Con*)parsed;
 272             printf("id as int = %p\n", current_match.con_id);
 273         }
 274     }
 275     | TOK_ID '=' STR
 276     {
 277         printf("criteria: window id = %s\n", $<string>3);
 278         char *end;
 279         long parsed = strtol($<string>3, &end, 10);
 280         if (parsed == LONG_MIN ||
 281             parsed == LONG_MAX ||
 282             parsed < 0 ||
 283             (end && *end != '\0')) {
 284             ELOG("Could not parse window id \"%s\"\n", $<string>3);
 285         } else {
 286             current_match.id = parsed;
 287             printf("window id as int = %d\n", current_match.id);
 288         }
 289     }
 290     | TOK_MARK '=' STR
 291     {
 292         printf("criteria: mark = %s\n", $<string>3);
 293         current_match.mark = $<string>3;
 294     }
 295     ;
 296
 297 operations:
 298     operation optwhitespace
 299     | operations ',' optwhitespace operation
 300     ;
 301
 302 operation:
 303     exec
 304     | exit
 305     | restart
 306     | reload
 307     | border
 308     | layout
 309     | restore
 310     | move
 311     | workspace
 312     | attach
 313     | focus
 314     | kill
 315     | open
 316     | fullscreen
 317     | next
 318     | prev
 319     | split
 320     | mode
 321     | level
 322     | mark
 323     | resize
 324     | nop
 325     ;
 326
 327 exec:
 328     TOK_EXEC WHITESPACE STR
 329     {
 330         printf("should execute %s\n", $<string>3);
 331         start_application($<string>3);
 332         free($<string>3);
 333     }
 334     ;
 335
 336 exit:
 337     TOK_EXIT
 338     {
 339         printf("exit, bye bye\n");
 340         exit(0);
 341     }
 342     ;
 343
 344 reload:
 345     TOK_RELOAD
 346     {
 347         printf("reloading\n");
 348         load_configuration(conn, NULL, true);
 349         /* Send an IPC event just in case the ws names have changed */
 350         ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"reload\"}");
 351     }
 352     ;
 353
 354 restart:
 355     TOK_RESTART
 356     {
 357         printf("restarting i3\n");
 358         i3_restart(false);
 359     }
 360     ;
 361
 362 attach:
 363     TOK_ATTACH
 364     {
 365         printf("should attach\n");
 366     }
 367     ;
 368
 369 focus:
 370     TOK_FOCUS
 371     {
 372         owindow *current;
 373
 374         printf("should focus\n");
 375         if (match_is_empty(&current_match)) {
 376             /* TODO: better error message */
 377             LOG("Error: The focus command requires you to use some criteria.\n");
 378             break;
 379         }
 380
 381         /* TODO: warning if the match contains more than one entry. does not
 382          * make so much sense when focusing */
 383         TAILQ_FOREACH(current, &owindows, owindows) {
 384             LOG("focusing %p / %s\n", current->con, current->con->name);
 385             con_focus(current->con);
 386         }
 387     }
 388     ;
 389
 390 kill:
 391     TOK_KILL
 392     {
 393         owindow *current;
 394
 395         printf("killing!\n");
 396         /* check if the match is empty, not if the result is empty */
 397         if (match_is_empty(&current_match))
 398             tree_close_con();
 399         else {
 400             TAILQ_FOREACH(current, &owindows, owindows) {
 401                 printf("matching: %p / %s\n", current->con, current->con->name);
 402                 tree_close(current->con, true, false);
 403             }
 404         }
 405
 406     }
 407     ;
 408
 409 workspace:
 410     TOK_WORKSPACE WHITESPACE STR
 411     {
 412         printf("should switch to workspace %s\n", $<string>3);
 413         workspace_show($<string>3);
 414         free($<string>3);
 415     }
 416     ;
 417
 418 open:
 419     TOK_OPEN
 420     {
 421         printf("opening new container\n");
 422         Con *con = tree_open_con(NULL);
 423         con_focus(con);
 424         asprintf(&json_output, "{\"success\":true, \"id\":%ld}", (long int)con);
 425     }
 426     ;
 427
 428 fullscreen:
 429     TOK_FULLSCREEN
 430     {
 431         printf("toggling fullscreen\n");
 432         owindow *current;
 433
 434         /* check if the match is empty, not if the result is empty */
 435         if (match_is_empty(&current_match))
 436             con_toggle_fullscreen(focused);
 437         else {
 438             TAILQ_FOREACH(current, &owindows, owindows) {
 439                 printf("matching: %p / %s\n", current->con, current->con->name);
 440                 con_toggle_fullscreen(current->con);
 441             }
 442         }
 443
 444     }
 445     ;
 446
 447 next:
 448     TOK_NEXT WHITESPACE direction
 449     {
 450         /* TODO: use matches */
 451         printf("should select next window in direction %c\n", $<chr>3);
 452         tree_next('n', ($<chr>3 == 'v' ? VERT : HORIZ));
 453     }
 454     ;
 455
 456 prev:
 457     TOK_PREV WHITESPACE direction
 458     {
 459         /* TODO: use matches */
 460         printf("should select prev window in direction %c\n", $<chr>3);
 461         tree_next('p', ($<chr>3 == 'v' ? VERT : HORIZ));
 462     }
 463     ;
 464
 465 split:
 466     TOK_SPLIT WHITESPACE direction
 467     {
 468         /* TODO: use matches */
 469         printf("splitting in direction %c\n", $<chr>3);
 470         tree_split(focused, ($<chr>3 == 'v' ? VERT : HORIZ));
 471     }
 472     ;
 473
 474 direction:
 475     TOK_HORIZONTAL  { $<chr>$ = 'h'; }
 476     | 'h'           { $<chr>$ = 'h'; }
 477     | TOK_VERTICAL  { $<chr>$ = 'v'; }
 478     | 'v'           { $<chr>$ = 'v'; }
 479     ;
 480
 481 mode:
 482     TOK_MODE WHITESPACE window_mode
 483     {
 484         if ($<number>3 == TOK_TOGGLE) {
 485             printf("should toggle mode\n");
 486             toggle_floating_mode(focused, false);
 487         } else {
 488             printf("should switch mode to %s\n", ($<number>3 == TOK_FLOATING ? "floating" : "tiling"));
 489             if ($<number>3 == TOK_FLOATING) {
 490                 floating_enable(focused, false);
 491             } else {
 492                 floating_disable(focused, false);
 493             }
 494         }
 495     }
 496     ;
 497
 498 window_mode:
 499     TOK_FLOATING    { $<number>$ = TOK_FLOATING; }
 500     | TOK_TILING    { $<number>$ = TOK_TILING; }
 501     | TOK_TOGGLE    { $<number>$ = TOK_TOGGLE; }
 502     ;
 503
 504 border:
 505     TOK_BORDER WHITESPACE border_style
 506     {
 507         printf("border style should be changed to %d\n", $<number>3);
 508         owindow *current;
 509
 510         /* check if the match is empty, not if the result is empty */
 511         if (match_is_empty(&current_match))
 512             focused->border_style = $<number>3;
 513         else {
 514             TAILQ_FOREACH(current, &owindows, owindows) {
 515                 printf("matching: %p / %s\n", current->con, current->con->name);
 516                 current->con->border_style = $<number>3;
 517             }
 518         }
 519     }
 520     ;
 521
 522 border_style:
 523     TOK_NORMAL      { $<number>$ = BS_NORMAL; }
 524     | TOK_NONE      { $<number>$ = BS_NONE; }
 525     | TOK_1PIXEL    { $<number>$ = BS_1PIXEL; }
 526     ;
 527
 528
 529 level:
 530     TOK_LEVEL WHITESPACE level_direction
 531     {
 532         printf("level %c\n", $<chr>3);
 533         if ($<chr>3 == 'u')
 534             level_up();
 535         else level_down();
 536     }
 537     ;
 538
 539 level_direction:
 540     TOK_UP     { $<chr>$ = 'u'; }
 541     | TOK_DOWN { $<chr>$ = 'd'; }
 542     ;
 543
 544 move:
 545     TOK_MOVE WHITESPACE direction
 546     {
 547         printf("moving in direction %d\n", $<number>3);
 548         tree_move($<number>3);
 549     }
 550     | TOK_MOVE WHITESPACE TOK_WORKSPACE WHITESPACE STR
 551     {
 552         owindow *current;
 553
 554         printf("should move window to workspace %s\n", $<string>5);
 555         /* get the workspace */
 556         Con *ws = workspace_get($<string>5, NULL);
 557         free($<string>5);
 558
 559         /* check if the match is empty, not if the result is empty */
 560         if (match_is_empty(&current_match))
 561             con_move_to_workspace(focused, ws);
 562         else {
 563             TAILQ_FOREACH(current, &owindows, owindows) {
 564                 printf("matching: %p / %s\n", current->con, current->con->name);
 565                 con_move_to_workspace(current->con, ws);
 566             }
 567         }
 568     }
 569     ;
 570
 571 restore:
 572     TOK_RESTORE WHITESPACE STR
 573     {
 574         printf("restoring \"%s\"\n", $<string>3);
 575         tree_append_json($<string>3);
 576         free($<string>3);
 577     }
 578     ;
 579
 580 layout:
 581     TOK_LAYOUT WHITESPACE layout_mode
 582     {
 583         printf("changing layout to %d\n", $<number>3);
 584         owindow *current;
 585
 586         /* check if the match is empty, not if the result is empty */
 587         if (match_is_empty(&current_match))
 588             con_set_layout(focused->parent, $<number>3);
 589         else {
 590             TAILQ_FOREACH(current, &owindows, owindows) {
 591                 printf("matching: %p / %s\n", current->con, current->con->name);
 592                 con_set_layout(current->con, $<number>3);
 593             }
 594         }
 595
 596     }
 597     ;
 598
 599 layout_mode:
 600     TOK_DEFAULT   { $<number>$ = L_DEFAULT; }
 601     | TOK_STACKED { $<number>$ = L_STACKED; }
 602     | TOK_TABBED  { $<number>$ = L_TABBED; }
 603     ;
 604
 605 mark:
 606     TOK_MARK WHITESPACE STR
 607     {
 608         printf("marking window with str %s\n", $<string>3);
 609         owindow *current;
 610
 611         /* check if the match is empty, not if the result is empty */
 612         if (match_is_empty(&current_match))
 613             focused->mark = sstrdup($<string>3);
 614         else {
 615             TAILQ_FOREACH(current, &owindows, owindows) {
 616                 printf("matching: %p / %s\n", current->con, current->con->name);
 617                 current->con->mark = sstrdup($<string>3);
 618             }
 619         }
 620
 621         free($<string>3);
 622     }
 623     ;
 624
 625 nop:
 626     TOK_NOP WHITESPACE STR
 627     {
 628         printf("-------------------------------------------------\n");
 629         printf("  NOP: %s\n", $<string>3);
 630         printf("-------------------------------------------------\n");
 631         free($<string>3);
 632     }
 633     ;
 634
 635 resize:
 636     TOK_RESIZE WHITESPACE resize_way WHITESPACE direction resize_px resize_tiling
 637     {
 638         /* resize <grow|shrink> <direction> [<px> px] [or <ppt> ppt] */
 639         printf("resizing in way %d, direction %d, px %d or ppt %d\n", $<number>3, $<number>5, $<number>6, $<number>7);
 640         int direction = $<number>5;
 641         int px = $<number>6;
 642         int ppt = $<number>7;
 643         if ($<number>3 == TOK_SHRINK) {
 644             px *= -1;
 645             ppt *= -1;
 646         }
 647
 648         if (con_is_floating(focused)) {
 649             printf("floating resize\n");
 650             if (direction == TOK_UP) {
 651                 focused->parent->rect.y -= px;
 652                 focused->parent->rect.height += px;
 653             } else if (direction == TOK_DOWN) {
 654                 focused->rect.height += px;
 655             } else if (direction == TOK_LEFT) {
 656                 focused->rect.x -= px;
 657                 focused->rect.width += px;
 658             } else {
 659                 focused->rect.width += px;
 660             }
 661         } else {
 662             LOG("tiling resize\n");
 663             /* get the default percentage */
 664             int children = con_num_children(focused->parent);
 665             Con *other;
 666             LOG("ins. %d children\n", children);
 667             double percentage = 1.0 / children;
 668             LOG("default percentage = %f\n", percentage);
 669
 670             if (direction == TOK_UP || direction == TOK_LEFT) {
 671                 other = TAILQ_PREV(focused, nodes_head, nodes);
 672             } else {
 673                 other = TAILQ_NEXT(focused, nodes);
 674             }
 675             if (other == TAILQ_END(workspaces)) {
 676                 LOG("No other container in this direction found, cannot resize.\n");
 677                 return 0;
 678             }
 679             LOG("other->percent = %f\n", other->percent);
 680             LOG("focused->percent before = %f\n", focused->percent);
 681             if (focused->percent == 0.0)
 682                 focused->percent = percentage;
 683             if (other->percent == 0.0)
 684                 other->percent = percentage;
 685             focused->percent += ((double)ppt / 100.0);
 686             other->percent -= ((double)ppt / 100.0);
 687             LOG("focused->percent after = %f\n", focused->percent);
 688             LOG("other->percent after = %f\n", other->percent);
 689         }
 690     }
 691     ;
 692
 693 resize_px:
 694     /* empty */
 695     {
 696         $<number>$ = 10;
 697     }
 698     | WHITESPACE NUMBER WHITESPACE TOK_PX
 699     {
 700         $<number>$ = $<number>2;
 701     }
 702     ;
 703
 704 resize_tiling:
 705     /* empty */
 706     {
 707         $<number>$ = 10;
 708     }
 709     | WHITESPACE TOK_OR WHITESPACE NUMBER WHITESPACE TOK_PPT
 710     {
 711         $<number>$ = $<number>4;
 712     }
 713     ;
 714
 715 resize_way:
 716     TOK_GROW        { $<number>$ = TOK_GROW; }
 717     | TOK_SHRINK    { $<number>$ = TOK_SHRINK; }
 718     ;
 719
 720 direction:
 721     TOK_UP          { $<number>$ = TOK_UP; }
 722     | TOK_DOWN      { $<number>$ = TOK_DOWN; }
 723     | TOK_LEFT      { $<number>$ = TOK_LEFT; }
 724     | TOK_RIGHT     { $<number>$ = TOK_RIGHT; }
 725     ;