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

   1 %{
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <xcb/xcb.h>
   5 #include <sys/types.h>
   6 #include <sys/stat.h>
   7 #include <unistd.h>
   8 #include <fcntl.h>
   9 #include <stdlib.h>
  10 #include <errno.h>
  11
  12 #include "data.h"
  13 #include "config.h"
  14 #include "i3.h"
  15 #include "util.h"
  16 #include "queue.h"
  17 #include "table.h"
  18
  19 extern int yylex(void);
  20 extern FILE *yyin;
  21
  22 int yydebug = 1;
  23
  24 void yyerror(const char *str) {
  25         fprintf(stderr,"error: %s\n",str);
  26 }
  27
  28 int yywrap() {
  29         return 1;
  30 }
  31
  32 void parse_file(const char *f) {
  33         SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
  34         int fd, ret, read_bytes = 0;
  35         struct stat stbuf;
  36         char *buf;
  37         FILE *fstr;
  38         char buffer[1026], key[512], value[512];
  39
  40         if ((fd = open(f, O_RDONLY)) == -1)
  41                 die("Could not open configuration file: %s\n", strerror(errno));
  42
  43         if (fstat(fd, &stbuf) == -1)
  44                 die("Could not fstat file: %s\n", strerror(errno));
  45
  46         buf = smalloc(stbuf.st_size * sizeof(char));
  47         while (read_bytes < stbuf.st_size) {
  48                 if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
  49                         die("Could not read(): %s\n", strerror(errno));
  50                 read_bytes += ret;
  51         }
  52
  53         if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
  54                 die("Could not lseek: %s\n", strerror(errno));
  55
  56         if ((fstr = fdopen(fd, "r")) == NULL)
  57                 die("Could not fdopen: %s\n", strerror(errno));
  58
  59         while (!feof(fstr)) {
  60                 if (fgets(buffer, 1024, fstr) == NULL) {
  61                         if (feof(fstr))
  62                                 break;
  63                         die("Could not read configuration file\n");
  64                 }
  65
  66                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
  67                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
  68                     key[0] == '#' || strlen(key) < 3)
  69                         continue;
  70
  71                 if (strcasecmp(key, "set") == 0) {
  72                         if (value[0] != '$')
  73                                 die("Malformed variable assignment, name has to start with $\n");
  74
  75                         /* get key/value for this variable */
  76                         char *v_key = value, *v_value;
  77                         if ((v_value = strstr(value, " ")) == NULL)
  78                                 die("Malformed variable assignment, need a value\n");
  79
  80                         *(v_value++) = '\0';
  81
  82                         struct Variable *new = scalloc(sizeof(struct Variable));
  83                         new->key = sstrdup(v_key);
  84                         new->value = sstrdup(v_value);
  85                         SLIST_INSERT_HEAD(&variables, new, variables);
  86                         LOG("Got new variable %s = %s\n", v_key, v_value);
  87                         continue;
  88                 }
  89         }
  90
  91         /* For every custom variable, see how often it occurs in the file and
  92          * how much extra bytes it requires when replaced. */
  93         struct Variable *current, *nearest;
  94         int extra_bytes = 0;
  95         SLIST_FOREACH(current, &variables, variables) {
  96                 int extra = (strlen(current->value) - strlen(current->key));
  97                 char *next;
  98                 for (next = buf;
  99                      (next = strcasestr(buf + (next - buf), current->key)) != NULL;
 100                      next += strlen(current->key))
 101                         extra_bytes += extra;
 102         }
 103
 104         /* Then, allocate a new buffer and copy the file over to the new one,
 105          * but replace occurences of our variables */
 106         char *walk = buf, *destwalk;
 107         char *new = smalloc((stbuf.st_size + extra_bytes) * sizeof(char));
 108         destwalk = new;
 109         while (walk < (buf + stbuf.st_size)) {
 110                 /* Find the next variable */
 111                 SLIST_FOREACH(current, &variables, variables)
 112                         current->next_match = strcasestr(walk, current->key);
 113                 nearest = NULL;
 114                 int distance = stbuf.st_size;
 115                 SLIST_FOREACH(current, &variables, variables) {
 116                         if (current->next_match == NULL)
 117                                 continue;
 118                         if ((current->next_match - walk) < distance) {
 119                                 distance = (current->next_match - walk);
 120                                 nearest = current;
 121                         }
 122                 }
 123                 if (nearest == NULL) {
 124                         /* If there are no more variables, we just copy the rest */
 125                         strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
 126                         destwalk += (buf + stbuf.st_size) - walk;
 127                         *destwalk = '\0';
 128                         break;
 129                 } else {
 130                         /* Copy until the next variable, then copy its value */
 131                         strncpy(destwalk, walk, distance);
 132                         strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
 133                         walk += distance + strlen(nearest->key);
 134                         destwalk += distance + strlen(nearest->value);
 135                 }
 136         }
 137
 138         yy_scan_string(new);
 139
 140         if (yyparse() != 0) {
 141                 fprintf(stderr, "Could not parse configfile\n");
 142                 exit(1);
 143         }
 144
 145         free(new);
 146         free(buf);
 147 }
 148
 149 %}
 150
 151 %union {
 152         int number;
 153         char *string;
 154         struct Colortriple *color;
 155 }
 156
 157 %token <number>NUMBER
 158 %token <string>WORD
 159 %token <string>STR
 160 %token <string>STR_NG
 161 %token <string>HEX
 162 %token TOKBIND
 163 %token TOKTERMINAL
 164 %token TOKCOMMENT
 165 %token TOKFONT
 166 %token TOKBINDSYM
 167 %token MODIFIER
 168 %token TOKCONTROL
 169 %token TOKSHIFT
 170 %token WHITESPACE
 171 %token TOKFLOATING_MODIFIER
 172 %token QUOTEDSTRING
 173 %token TOKWORKSPACE
 174 %token TOKSCREEN
 175 %token TOKASSIGN
 176 %token TOKSET
 177 %token TOKIPCSOCKET
 178 %token TOKEXEC
 179 %token TOKCOLOR
 180 %token TOKARROW
 181
 182 %%
 183
 184 lines: /* empty */
 185         | lines WHITESPACE line
 186         | lines line
 187         ;
 188
 189 line:
 190         bind
 191         | bindsym
 192         | floating_modifier
 193         | workspace
 194         | assign
 195         | ipcsocket
 196         | exec
 197         | color
 198         | terminal
 199         | font
 200         | comment
 201         ;
 202
 203 comment:
 204         TOKCOMMENT
 205         ;
 206
 207 command:
 208         STR
 209         ;
 210
 211 bind:
 212         TOKBIND WHITESPACE binding_modifiers NUMBER WHITESPACE command
 213         {
 214                 printf("\tFound binding mod%d with key %d and command %s\n", $<number>3, $4, $<string>6);
 215                 Binding *new = scalloc(sizeof(Binding));
 216
 217                 new->keycode = $<number>4;
 218                 new->mods = $<number>3;
 219                 new->command = sstrdup($<string>6);
 220
 221                 TAILQ_INSERT_TAIL(&bindings, new, bindings);
 222         }
 223         ;
 224
 225 bindsym:
 226         TOKBINDSYM WHITESPACE binding_modifiers WORD WHITESPACE command
 227         {
 228                 printf("\tFound symbolic mod%d with key %s and command %s\n", $<number>3, $4, $<string>6);
 229                 Binding *new = scalloc(sizeof(Binding));
 230
 231                 new->symbol = sstrdup($4);
 232                 new->mods = $<number>3;
 233                 new->command = sstrdup($<string>6);
 234
 235                 TAILQ_INSERT_TAIL(&bindings, new, bindings);
 236         }
 237         ;
 238
 239 floating_modifier:
 240         TOKFLOATING_MODIFIER WHITESPACE binding_modifiers
 241         {
 242                 LOG("floating modifier = %d\n", $<number>3);
 243                 config.floating_modifier = $<number>3;
 244         }
 245         ;
 246
 247 workspace:
 248         TOKWORKSPACE WHITESPACE NUMBER WHITESPACE TOKSCREEN WHITESPACE screen workspace_name
 249         {
 250                 int ws_num = $<number>3;
 251                 if (ws_num < 1 || ws_num > 10) {
 252                         LOG("Invalid workspace assignment, workspace number %d out of range\n", ws_num);
 253                 } else {
 254                         workspaces[ws_num - 1].preferred_screen = sstrdup($<string>7);
 255                         if ($<string>8 != NULL)
 256                                 workspace_set_name(&(workspaces[ws_num - 1]), $<string>8);
 257                 }
 258         }
 259         ;
 260
 261 workspace_name:
 262         /* NULL */                      { $<string>$ = NULL; }
 263         | WHITESPACE QUOTEDSTRING       { $<string>$ = $<string>2; }
 264         | WHITESPACE STR                { $<string>$ = $<string>2; }
 265         ;
 266
 267 screen:
 268         NUMBER              { asprintf(&$<string>$, "%d", $<number>1); }
 269         | NUMBER 'x'        { asprintf(&$<string>$, "%d", $<number>1); }
 270         | NUMBER 'x' NUMBER { asprintf(&$<string>$, "%dx%d", $<number>1, $<number>3); }
 271         | 'x' NUMBER        { asprintf(&$<string>$, "x%d", $<number>2); }
 272         ;
 273
 274 assign:
 275         TOKASSIGN WHITESPACE window_class WHITESPACE optional_arrow NUMBER
 276         {
 277                 /* TODO */
 278                 printf("assignment of %s to %d\n", $<string>3, $<number>6);
 279         }
 280         ;
 281
 282 window_class:
 283         QUOTEDSTRING
 284         | STR_NG
 285         ;
 286
 287 optional_arrow:
 288         /* NULL */
 289         | TOKARROW WHITESPACE
 290         ;
 291
 292 ipcsocket:
 293         TOKIPCSOCKET WHITESPACE STR
 294         {
 295                 config.ipc_socket_path = sstrdup($<string>3);
 296         }
 297         ;
 298
 299 exec:
 300         TOKEXEC WHITESPACE STR
 301         {
 302                 struct Autostart *new = smalloc(sizeof(struct Autostart));
 303                 new->command = sstrdup($<string>3);
 304                 TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 305         }
 306         ;
 307
 308 terminal:
 309         TOKTERMINAL WHITESPACE STR
 310         {
 311                 config.terminal = sstrdup($<string>3);
 312                 printf("terminal %s\n", config.terminal);
 313         }
 314         ;
 315
 316 font:
 317         TOKFONT WHITESPACE STR
 318         {
 319                 config.font = sstrdup($<string>3);
 320                 printf("font %s\n", config.font);
 321         }
 322         ;
 323
 324
 325 color:
 326         TOKCOLOR WHITESPACE colorpixel WHITESPACE colorpixel WHITESPACE colorpixel
 327         {
 328                 struct Colortriple *dest = $<color>1;
 329
 330                 dest->border = $<number>3;
 331                 dest->background = $<number>5;
 332                 dest->text = $<number>7;
 333         }
 334         ;
 335
 336 colorpixel:
 337         '#' HEX         { $<number>$ = get_colorpixel(global_conn, $<string>2); }
 338         ;
 339
 340
 341 binding_modifiers:
 342         /* NULL */                               { $<number>$ = 0; }
 343         | binding_modifier
 344         | binding_modifiers '+' binding_modifier { $<number>$ = $<number>1 | $<number>3; }
 345         | binding_modifiers '+'                  { $<number>$ = $<number>1; }
 346         ;
 347
 348 binding_modifier:
 349         MODIFIER        { $<number>$ = $<number>1; }
 350         | TOKCONTROL    { $<number>$ = BIND_CONTROL; }
 351         | TOKSHIFT      { $<number>$ = BIND_SHIFT; }
 352         ;