parser/parse.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    parse.c for the Openbox window manager
   4    Copyright (c) 2003-2007   Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "parse.h"
  20 #include <glib.h>
  21 #include <string.h>
  22 #include <errno.h>
  23 #include <sys/stat.h>
  24 #include <sys/types.h>
  25 #include <unistd.h>
  26
  27 static gboolean xdg_start;
  28 static gchar   *xdg_config_home_path;
  29 static gchar   *xdg_data_home_path;
  30 static GSList  *xdg_config_dir_paths;
  31 static GSList  *xdg_data_dir_paths;
  32
  33 struct Callback {
  34     gchar *tag;
  35     ParseCallback func;
  36     gpointer data;
  37 };
  38
  39 struct _ObParseInst {
  40     GHashTable *callbacks;
  41 };
  42
  43 static void destfunc(struct Callback *c)
  44 {
  45     g_free(c->tag);
  46     g_free(c);
  47 }
  48
  49 ObParseInst* parse_startup(void)
  50 {
  51     ObParseInst *i = g_new(ObParseInst, 1);
  52     i->callbacks = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
  53                                          (GDestroyNotify)destfunc);
  54     return i;
  55 }
  56
  57 void parse_shutdown(ObParseInst *i)
  58 {
  59     if (i) {
  60         g_hash_table_destroy(i->callbacks);
  61         g_free(i);
  62     }
  63 }
  64
  65 void parse_register(ObParseInst *i, const gchar *tag,
  66                     ParseCallback func, gpointer data)
  67 {
  68     struct Callback *c;
  69
  70     if ((c = g_hash_table_lookup(i->callbacks, tag))) {
  71         g_error("Tag '%s' already registered", tag);
  72         return;
  73     }
  74
  75     c = g_new(struct Callback, 1);
  76     c->tag = g_strdup(tag);
  77     c->func = func;
  78     c->data = data;
  79     g_hash_table_insert(i->callbacks, c->tag, c);
  80 }
  81
  82 gboolean parse_load_rc(const gchar *file, xmlDocPtr *doc, xmlNodePtr *root)
  83 {
  84     GSList *it;
  85     gboolean r = FALSE;
  86
  87     if (file && parse_load(file, "openbox_config", doc, root))
  88         return TRUE;
  89
  90     for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
  91         gchar *path;
  92
  93         path = g_build_filename(it->data, "openbox", "rc.xml", NULL);
  94         r = parse_load(path, "openbox_config", doc, root);
  95         g_free(path);
  96     }
  97
  98     return r;
  99 }
 100
 101 gboolean parse_load_theme(const gchar *name, xmlDocPtr *doc, xmlNodePtr *root,
 102                           gchar **retpath)
 103 {
 104     GSList *it;
 105     gchar *path;
 106     gboolean r = FALSE;
 107     gchar *eng;
 108
 109     /* backward compatibility.. */
 110     path = g_build_filename(g_get_home_dir(), ".themes", name,
 111                             "openbox-3", "themerc.xml", NULL);
 112     if (parse_load(path, "openbox_theme", doc, root) &&
 113         parse_attr_string("engine", *root, &eng))
 114     {
 115         if (!strcmp(eng, "box")) {
 116             *retpath = g_path_get_dirname(path);
 117             r = TRUE;
 118         }
 119         g_free(eng);
 120     }
 121     g_free(path);
 122
 123     if (!r) {
 124         for (it = xdg_data_dir_paths; !r && it; it = g_slist_next(it)) {
 125             path = g_build_filename(it->data, "themes", name, "openbox-3",
 126                                     "themerc.xml", NULL);
 127             if (parse_load(path, "openbox_theme", doc, root) &&
 128                 parse_attr_string("engine", *root, &eng))
 129             {
 130                 if (!strcmp(eng, "box")) {
 131                     *retpath = g_path_get_dirname(path);
 132                     r = TRUE;
 133                 }
 134                 g_free(eng);
 135             }
 136             g_free(path);
 137         }
 138     }
 139     return r;
 140 }
 141
 142 gboolean parse_load_menu(const gchar *file, xmlDocPtr *doc, xmlNodePtr *root)
 143 {
 144     GSList *it;
 145     gchar *path;
 146     gboolean r = FALSE;
 147
 148     if (file[0] == '/') {
 149         r = parse_load(file, "openbox_menu", doc, root);
 150     } else {
 151         for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
 152             path = g_build_filename(it->data, "openbox", file, NULL);
 153             r = parse_load(path, "openbox_menu", doc, root);
 154             g_free(path);
 155         }
 156     }
 157     return r;
 158 }
 159
 160 gboolean parse_load(const gchar *path, const gchar *rootname,
 161                     xmlDocPtr *doc, xmlNodePtr *root)
 162 {
 163     struct stat s;
 164
 165     if (stat(path, &s) < 0)
 166         return FALSE;
 167
 168     /* XML_PARSE_BLANKS is needed apparently. When it loads a theme file,
 169        without this option, the tree is weird and has extra nodes in it. */
 170     if ((*doc = xmlReadFile(path, NULL,
 171                             XML_PARSE_NOBLANKS | XML_PARSE_RECOVER))) {
 172         *root = xmlDocGetRootElement(*doc);
 173         if (!*root) {
 174             xmlFreeDoc(*doc);
 175             *doc = NULL;
 176             g_message("%s is an empty document", path);
 177         } else {
 178             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 179                 xmlFreeDoc(*doc);
 180                 *doc = NULL;
 181                 g_message("XML Document %s is of wrong type. Root "
 182                           "node is not '%s'", path, rootname);
 183             }
 184         }
 185     }
 186     if (!*doc)
 187         return FALSE;
 188     return TRUE;
 189 }
 190
 191 gboolean parse_load_mem(gpointer data, guint len, const gchar *rootname,
 192                         xmlDocPtr *doc, xmlNodePtr *root)
 193 {
 194     if ((*doc = xmlParseMemory(data, len))) {
 195         *root = xmlDocGetRootElement(*doc);
 196         if (!*root) {
 197             xmlFreeDoc(*doc);
 198             *doc = NULL;
 199             g_message("Given memory is an empty document");
 200         } else {
 201             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 202                 xmlFreeDoc(*doc);
 203                 *doc = NULL;
 204                 g_message("XML Document in given memory is of wrong "
 205                           "type. Root node is not '%s'\n", rootname);
 206             }
 207         }
 208     }
 209     if (!*doc)
 210         return FALSE;
 211     return TRUE;
 212 }
 213
 214 void parse_close(xmlDocPtr doc)
 215 {
 216     xmlFreeDoc(doc);
 217 }
 218
 219 void parse_tree(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node)
 220 {
 221     while (node) {
 222         struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
 223
 224         if (c)
 225             c->func(i, doc, node, c->data);
 226
 227         node = node->next;
 228     }
 229 }
 230
 231 gchar *parse_string(xmlDocPtr doc, xmlNodePtr node)
 232 {
 233     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 234     gchar *s = g_strdup(c ? (gchar*)c : "");
 235     xmlFree(c);
 236     return s;
 237 }
 238
 239 gint parse_int(xmlDocPtr doc, xmlNodePtr node)
 240 {
 241     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 242     gint i = c ? atoi((gchar*)c) : 0;
 243     xmlFree(c);
 244     return i;
 245 }
 246
 247 gboolean parse_bool(xmlDocPtr doc, xmlNodePtr node)
 248 {
 249     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 250     gboolean b = FALSE;
 251     if (c && !xmlStrcasecmp(c, (const xmlChar*) "true"))
 252         b = TRUE;
 253     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "yes"))
 254         b = TRUE;
 255     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "on"))
 256         b = TRUE;
 257     xmlFree(c);
 258     return b;
 259 }
 260
 261 gboolean parse_contains(const gchar *val, xmlDocPtr doc, xmlNodePtr node)
 262 {
 263     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 264     gboolean r;
 265     r = !xmlStrcasecmp(c, (const xmlChar*) val);
 266     xmlFree(c);
 267     return r;
 268 }
 269
 270 xmlNodePtr parse_find_node(const gchar *tag, xmlNodePtr node)
 271 {
 272     while (node) {
 273         if (!xmlStrcmp(node->name, (const xmlChar*) tag))
 274             return node;
 275         node = node->next;
 276     }
 277     return NULL;
 278 }
 279
 280 gboolean parse_attr_bool(const gchar *name, xmlNodePtr node, gboolean *value)
 281 {
 282     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 283     gboolean r = FALSE;
 284     if (c) {
 285         if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 286             *value = TRUE, r = TRUE;
 287         else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 288             *value = TRUE, r = TRUE;
 289         else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 290             *value = TRUE, r = TRUE;
 291         else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
 292             *value = FALSE, r = TRUE;
 293         else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
 294             *value = FALSE, r = TRUE;
 295         else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
 296             *value = FALSE, r = TRUE;
 297     }
 298     xmlFree(c);
 299     return r;
 300 }
 301
 302 gboolean parse_attr_int(const gchar *name, xmlNodePtr node, gint *value)
 303 {
 304     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 305     gboolean r = FALSE;
 306     if (c) {
 307         *value = atoi((gchar*)c);
 308         r = TRUE;
 309     }
 310     xmlFree(c);
 311     return r;
 312 }
 313
 314 gboolean parse_attr_string(const gchar *name, xmlNodePtr node, gchar **value)
 315 {
 316     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 317     gboolean r = FALSE;
 318     if (c) {
 319         *value = g_strdup((gchar*)c);
 320         r = TRUE;
 321     }
 322     xmlFree(c);
 323     return r;
 324 }
 325
 326 gboolean parse_attr_contains(const gchar *val, xmlNodePtr node,
 327                              const gchar *name)
 328 {
 329     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 330     gboolean r = FALSE;
 331     if (c)
 332         r = !xmlStrcasecmp(c, (const xmlChar*) val);
 333     xmlFree(c);
 334     return r;
 335 }
 336
 337 static gint slist_path_cmp(const gchar *a, const gchar *b)
 338 {
 339     return strcmp(a, b);
 340 }
 341
 342 typedef GSList* (*GSListFunc) (gpointer list, gconstpointer data);
 343
 344 static GSList* slist_path_add(GSList *list, gpointer data, GSListFunc func)
 345 {
 346     g_assert(func);
 347
 348     if (!data)
 349         return list;
 350
 351     if (!g_slist_find_custom(list, data, (GCompareFunc) slist_path_cmp))
 352         list = func(list, data);
 353     else
 354         g_free(data);
 355
 356     return list;
 357 }
 358
 359 static GSList* split_paths(const gchar *paths)
 360 {
 361     GSList *list = NULL;
 362     gchar **spl, **it;
 363
 364     if (!paths)
 365         return NULL;
 366     spl = g_strsplit(paths, ":", -1);
 367     for (it = spl; *it; ++it)
 368         list = slist_path_add(list, *it, (GSListFunc) g_slist_append);
 369     g_free(spl);
 370     return list;
 371 }
 372
 373 void parse_paths_startup(void)
 374 {
 375     const gchar *path;
 376
 377     if (xdg_start)
 378         return;
 379     xdg_start = TRUE;
 380
 381     path = g_getenv("XDG_CONFIG_HOME");
 382     if (path && path[0] != '\0') /* not unset or empty */
 383         xdg_config_home_path = g_build_filename(path, NULL);
 384     else
 385         xdg_config_home_path = g_build_filename(g_get_home_dir(), ".config",
 386                                                 NULL);
 387
 388     path = g_getenv("XDG_DATA_HOME");
 389     if (path && path[0] != '\0') /* not unset or empty */
 390         xdg_data_home_path = g_build_filename(path, NULL);
 391     else
 392         xdg_data_home_path = g_build_filename(g_get_home_dir(), ".local",
 393                                               "share", NULL);
 394
 395     path = g_getenv("XDG_CONFIG_DIRS");
 396     if (path && path[0] != '\0') /* not unset or empty */
 397         xdg_config_dir_paths = split_paths(path);
 398     else {
 399         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 400                                               g_strdup(CONFIGDIR),
 401                                               (GSListFunc) g_slist_append);
 402         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 403                                               g_build_filename
 404                                               (G_DIR_SEPARATOR_S,
 405                                                "etc", "xdg", NULL),
 406                                               (GSListFunc) g_slist_append);
 407     }
 408     xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 409                                           g_strdup(xdg_config_home_path),
 410                                           (GSListFunc) g_slist_prepend);
 411
 412     path = g_getenv("XDG_DATA_DIRS");
 413     if (path && path[0] != '\0') /* not unset or empty */
 414         xdg_data_dir_paths = split_paths(path);
 415     else {
 416         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 417                                             g_strdup(DATADIR),
 418                                             (GSListFunc) g_slist_append);
 419         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 420                                             g_build_filename
 421                                             (G_DIR_SEPARATOR_S,
 422                                              "usr", "local", "share", NULL),
 423                                             (GSListFunc) g_slist_append);
 424         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 425                                             g_build_filename
 426                                             (G_DIR_SEPARATOR_S,
 427                                              "usr", "share", NULL),
 428                                             (GSListFunc) g_slist_append);
 429     }
 430     xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 431                                         g_strdup(xdg_data_home_path),
 432                                         (GSListFunc) g_slist_prepend);
 433 }
 434
 435 void parse_paths_shutdown(void)
 436 {
 437     GSList *it;
 438
 439     if (!xdg_start)
 440         return;
 441     xdg_start = FALSE;
 442
 443     for (it = xdg_config_dir_paths; it; it = g_slist_next(it))
 444         g_free(it->data);
 445     g_slist_free(xdg_config_dir_paths);
 446     xdg_config_dir_paths = NULL;
 447     for (it = xdg_data_dir_paths; it; it = g_slist_next(it))
 448         g_free(it->data);
 449     g_slist_free(xdg_data_dir_paths);
 450     xdg_data_dir_paths = NULL;
 451     g_free(xdg_config_home_path);
 452     xdg_config_home_path = NULL;
 453     g_free(xdg_data_home_path);
 454     xdg_data_home_path = NULL;
 455 }
 456
 457 gchar *parse_expand_tilde(const gchar *f)
 458 {
 459     gchar **spl;
 460     gchar *ret;
 461
 462     if (!f)
 463         return NULL;
 464     spl = g_strsplit(f, "~", 0);
 465     ret = g_strjoinv(g_get_home_dir(), spl);
 466     g_strfreev(spl);
 467     return ret;
 468 }
 469
 470 gboolean parse_mkdir(const gchar *path, gint mode)
 471 {
 472     gboolean ret = TRUE;
 473
 474     g_return_val_if_fail(path != NULL, FALSE);
 475     g_return_val_if_fail(path[0] != '\0', FALSE);
 476
 477     if (!g_file_test(path, G_FILE_TEST_IS_DIR))
 478         if (mkdir(path, mode) == -1)
 479             ret = FALSE;
 480
 481     return ret;
 482 }
 483
 484 gboolean parse_mkdir_path(const gchar *path, gint mode)
 485 {
 486     gboolean ret = TRUE;
 487
 488     g_return_val_if_fail(path != NULL, FALSE);
 489     g_return_val_if_fail(path[0] == '/', FALSE);
 490
 491     if (!g_file_test(path, G_FILE_TEST_IS_DIR)) {
 492         gchar *c, *e;
 493
 494         c = g_strdup(path);
 495         e = c;
 496         while ((e = strchr(e + 1, '/'))) {
 497             *e = '\0';
 498             if (!(ret = parse_mkdir(c, mode)))
 499                 goto parse_mkdir_path_end;
 500             *e = '/';
 501         }
 502         ret = parse_mkdir(c, mode);
 503
 504     parse_mkdir_path_end:
 505         g_free(c);
 506     }
 507
 508     return ret;
 509 }
 510
 511 const gchar* parse_xdg_config_home_path(void)
 512 {
 513     return xdg_config_home_path;
 514 }
 515
 516 const gchar* parse_xdg_data_home_path(void)
 517 {
 518     return xdg_data_home_path;
 519 }
 520
 521 GSList* parse_xdg_config_dir_paths(void)
 522 {
 523     return xdg_config_dir_paths;
 524 }
 525
 526 GSList* parse_xdg_data_dir_paths(void)
 527 {
 528     return xdg_data_dir_paths;
 529 }