Dogcows Code - chaz/openbox/blob - 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()
  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                        gchar **fileused)
  84 {
  85     GSList *it;
  86     gboolean r = FALSE;
  87
  88     *fileused = NULL;
  89
  90     if (file) {
  91         if ((r = parse_load(file, "openbox_config", doc, root)))
  92             *fileused = g_strdup(file);
  93     } else {
  94         /* this won't run if the above code loaded a config */
  95         for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
  96             gchar *path;
  97
  98             path = g_build_filename(it->data, "openbox", "rc.xml", NULL);
  99             if ((r = parse_load(path, "openbox_config", doc, root)))
 100                 *fileused = path;
 101             else
 102                 g_free(path);
 103         }
 104     }
 105     return r;
 106 }
 107
 108 gboolean parse_load_theme(const gchar *name, xmlDocPtr *doc, xmlNodePtr *root,
 109                           gchar **retpath)
 110 {
 111     GSList *it;
 112     gchar *path;
 113     gboolean r = FALSE;
 114
 115     /* backward compatibility.. */
 116     path = g_build_filename(g_get_home_dir(), ".themes", name,
 117                             "openbox-3", "themerc.xml", NULL);
 118     if ((r = parse_load(path, "openbox_theme", doc, root)))
 119         *retpath = g_path_get_dirname(path);
 120     g_free(path);
 121
 122     if (!r) {
 123         for (it = xdg_data_dir_paths; !r && it; it = g_slist_next(it)) {
 124             path = g_build_filename(it->data, "themes", name, "openbox-3",
 125                                     "themerc.xml", NULL);
 126             if ((r = parse_load(path, "openbox_theme", doc, root)))
 127                 *retpath = g_path_get_dirname(path);
 128             g_free(path);
 129         }
 130     }
 131     return r;
 132 }
 133
 134 gboolean parse_load_menu(const gchar *file, xmlDocPtr *doc, xmlNodePtr *root)
 135 {
 136     GSList *it;
 137     gchar *path;
 138     gboolean r = FALSE;
 139
 140     if (file[0] == '/') {
 141         r = parse_load(file, "openbox_menu", doc, root);
 142     } else {
 143         for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
 144             path = g_build_filename(it->data, "openbox", file, NULL);
 145             r = parse_load(path, "openbox_menu", doc, root);
 146             g_free(path);
 147         }
 148     }
 149     return r;
 150 }
 151
 152 gboolean parse_load(const gchar *path, const gchar *rootname,
 153                     xmlDocPtr *doc, xmlNodePtr *root)
 154 {
 155     struct stat s;
 156     if (stat(path, &s) < 0)
 157         return FALSE;
 158
 159     /* XML_PARSE_BLANKS is needed apparently. When it loads a theme file,
 160        without this option, the tree is weird and has extra nodes in it. */
 161     if ((*doc = xmlReadFile(path, NULL,
 162                             XML_PARSE_NOBLANKS | XML_PARSE_RECOVER))) {
 163         *root = xmlDocGetRootElement(*doc);
 164         if (!*root) {
 165             xmlFreeDoc(*doc);
 166             *doc = NULL;
 167             g_message("%s is an empty document", path);
 168         } else {
 169             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 170                 xmlFreeDoc(*doc);
 171                 *doc = NULL;
 172                 g_message("XML Document %s is of wrong type. Root "
 173                           "node is not '%s'", path, rootname);
 174             }
 175         }
 176     }
 177     if (!*doc)
 178         return FALSE;
 179     return TRUE;
 180 }
 181
 182 gboolean parse_load_mem(gpointer data, guint len, const gchar *rootname,
 183                         xmlDocPtr *doc, xmlNodePtr *root)
 184 {
 185     if ((*doc = xmlParseMemory(data, len))) {
 186         *root = xmlDocGetRootElement(*doc);
 187         if (!*root) {
 188             xmlFreeDoc(*doc);
 189             *doc = NULL;
 190             g_message("Given memory is an empty document");
 191         } else {
 192             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 193                 xmlFreeDoc(*doc);
 194                 *doc = NULL;
 195                 g_message("XML Document in given memory is of wrong "
 196                           "type. Root node is not '%s'\n", rootname);
 197             }
 198         }
 199     }
 200     if (!*doc)
 201         return FALSE;
 202     return TRUE;
 203 }
 204
 205 void parse_close(xmlDocPtr doc)
 206 {
 207     xmlFreeDoc(doc);
 208 }
 209
 210 void parse_tree(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node)
 211 {
 212     while (node) {
 213         struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
 214
 215         if (c)
 216             c->func(i, doc, node, c->data);
 217
 218         node = node->next;
 219     }
 220 }
 221
 222 gchar *parse_string(xmlDocPtr doc, xmlNodePtr node)
 223 {
 224     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 225     gchar *s = g_strdup(c ? (gchar*)c : "");
 226     xmlFree(c);
 227     return s;
 228 }
 229
 230 gint parse_int(xmlDocPtr doc, xmlNodePtr node)
 231 {
 232     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 233     gint i = atoi((gchar*)c);
 234     xmlFree(c);
 235     return i;
 236 }
 237
 238 gboolean parse_bool(xmlDocPtr doc, xmlNodePtr node)
 239 {
 240     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 241     gboolean b = FALSE;
 242     if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 243         b = TRUE;
 244     else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 245         b = TRUE;
 246     else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 247         b = TRUE;
 248     xmlFree(c);
 249     return b;
 250 }
 251
 252 gboolean parse_contains(const gchar *val, xmlDocPtr doc, xmlNodePtr node)
 253 {
 254     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 255     gboolean r;
 256     r = !xmlStrcasecmp(c, (const xmlChar*) val);
 257     xmlFree(c);
 258     return r;
 259 }
 260
 261 xmlNodePtr parse_find_node(const gchar *tag, xmlNodePtr node)
 262 {
 263     while (node) {
 264         if (!xmlStrcmp(node->name, (const xmlChar*) tag))
 265             return node;
 266         node = node->next;
 267     }
 268     return NULL;
 269 }
 270
 271 gboolean parse_attr_bool(const gchar *name, xmlNodePtr node, gboolean *value)
 272 {
 273     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 274     gboolean r = FALSE;
 275     if (c) {
 276         if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 277             *value = TRUE, r = TRUE;
 278         else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 279             *value = TRUE, r = TRUE;
 280         else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 281             *value = TRUE, r = TRUE;
 282         else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
 283             *value = FALSE, r = TRUE;
 284         else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
 285             *value = FALSE, r = TRUE;
 286         else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
 287             *value = FALSE, r = TRUE;
 288     }
 289     xmlFree(c);
 290     return r;
 291 }
 292
 293 gboolean parse_attr_int(const gchar *name, xmlNodePtr node, gint *value)
 294 {
 295     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 296     gboolean r = FALSE;
 297     if (c) {
 298         *value = atoi((gchar*)c);
 299         r = TRUE;
 300     }
 301     xmlFree(c);
 302     return r;
 303 }
 304
 305 gboolean parse_attr_string(const gchar *name, xmlNodePtr node, gchar **value)
 306 {
 307     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 308     gboolean r = FALSE;
 309     if (c) {
 310         *value = g_strdup((gchar*)c);
 311         r = TRUE;
 312     }
 313     xmlFree(c);
 314     return r;
 315 }
 316
 317 gboolean parse_attr_contains(const gchar *val, xmlNodePtr node,
 318                              const gchar *name)
 319 {
 320     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 321     gboolean r = FALSE;
 322     if (c)
 323         r = !xmlStrcasecmp(c, (const xmlChar*) val);
 324     xmlFree(c);
 325     return r;
 326 }
 327
 328 static gint slist_path_cmp(const gchar *a, const gchar *b)
 329 {
 330     return strcmp(a, b);
 331 }
 332
 333 typedef GSList* (*GSListFunc) (gpointer list, gconstpointer data);
 334
 335 static GSList* slist_path_add(GSList *list, gpointer data, GSListFunc func)
 336 {
 337     g_assert(func);
 338
 339     if (!data)
 340         return list;
 341
 342     if (!g_slist_find_custom(list, data, (GCompareFunc) slist_path_cmp))
 343         list = func(list, data);
 344     else
 345         g_free(data);
 346
 347     return list;
 348 }
 349
 350 static GSList* split_paths(const gchar *paths)
 351 {
 352     GSList *list = NULL;
 353     gchar **spl, **it;
 354
 355     if (!paths)
 356         return NULL;
 357     spl = g_strsplit(paths, ":", -1);
 358     for (it = spl; *it; ++it)
 359         list = slist_path_add(list, *it, (GSListFunc) g_slist_append);
 360     g_free(spl);
 361     return list;
 362 }
 363
 364 void parse_paths_startup()
 365 {
 366     const gchar *path;
 367
 368     if (xdg_start)
 369         return;
 370     xdg_start = TRUE;
 371
 372     path = g_getenv("XDG_CONFIG_HOME");
 373     if (path && path[0] != '\0') /* not unset or empty */
 374         xdg_config_home_path = g_build_filename(path, NULL);
 375     else
 376         xdg_config_home_path = g_build_filename(g_get_home_dir(), ".config",
 377                                                 NULL);
 378
 379     path = g_getenv("XDG_DATA_HOME");
 380     if (path && path[0] != '\0') /* not unset or empty */
 381         xdg_data_home_path = g_build_filename(path, NULL);
 382     else
 383         xdg_data_home_path = g_build_filename(g_get_home_dir(), ".local",
 384                                               "share", NULL);
 385
 386     path = g_getenv("XDG_CONFIG_DIRS");
 387     if (path && path[0] != '\0') /* not unset or empty */
 388         xdg_config_dir_paths = split_paths(path);
 389     else {
 390         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 391                                               g_strdup(CONFIGDIR),
 392                                               (GSListFunc) g_slist_append);
 393         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 394                                               g_build_filename
 395                                               (G_DIR_SEPARATOR_S,
 396                                                "etc", "xdg", NULL),
 397                                               (GSListFunc) g_slist_append);
 398     }
 399     xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 400                                           g_strdup(xdg_config_home_path),
 401                                           (GSListFunc) g_slist_prepend);
 402
 403     path = g_getenv("XDG_DATA_DIRS");
 404     if (path && path[0] != '\0') /* not unset or empty */
 405         xdg_data_dir_paths = split_paths(path);
 406     else {
 407         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 408                                             g_build_filename
 409                                             (G_DIR_SEPARATOR_S,
 410                                              "usr", "local", "share", NULL),
 411                                             (GSListFunc) g_slist_append);
 412         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 413                                             g_build_filename
 414                                             (G_DIR_SEPARATOR_S,
 415                                              "usr", "share", NULL),
 416                                             (GSListFunc) g_slist_append);
 417         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 418                                             g_strdup(DATADIR),
 419                                             (GSListFunc) g_slist_append);
 420     }
 421     xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 422                                         g_strdup(xdg_data_home_path),
 423                                         (GSListFunc) g_slist_prepend);
 424 }
 425
 426 void parse_paths_shutdown()
 427 {
 428     GSList *it;
 429
 430     if (!xdg_start)
 431         return;
 432     xdg_start = FALSE;
 433
 434     for (it = xdg_config_dir_paths; it; it = g_slist_next(it))
 435         g_free(it->data);
 436     g_slist_free(xdg_config_dir_paths);
 437     xdg_config_dir_paths = NULL;
 438     for (it = xdg_data_dir_paths; it; it = g_slist_next(it))
 439         g_free(it->data);
 440     g_slist_free(xdg_data_dir_paths);
 441     xdg_data_dir_paths = NULL;
 442     g_free(xdg_config_home_path);
 443     xdg_config_home_path = NULL;
 444     g_free(xdg_data_home_path);
 445     xdg_data_home_path = NULL;
 446 }
 447
 448 gchar *parse_expand_tilde(const gchar *f)
 449 {
 450     gchar **spl;
 451     gchar *ret;
 452
 453     if (!f)
 454         return NULL;
 455     spl = g_strsplit(f, "~", 0);
 456     ret = g_strjoinv(g_get_home_dir(), spl);
 457     g_strfreev(spl);
 458     return ret;
 459 }
 460
 461 gboolean parse_mkdir(const gchar *path, gint mode)
 462 {
 463     gboolean ret = TRUE;
 464
 465     g_return_val_if_fail(path != NULL, FALSE);
 466     g_return_val_if_fail(path[0] != '\0', FALSE);
 467
 468     if (!g_file_test(path, G_FILE_TEST_IS_DIR))
 469         if (mkdir(path, mode) == -1)
 470             ret = FALSE;
 471
 472     return ret;
 473 }
 474
 475 gboolean parse_mkdir_path(const gchar *path, gint mode)
 476 {
 477     gboolean ret = TRUE;
 478
 479     g_return_val_if_fail(path != NULL, FALSE);
 480     g_return_val_if_fail(path[0] == '/', FALSE);
 481
 482     if (!g_file_test(path, G_FILE_TEST_IS_DIR)) {
 483         gchar *c, *e;
 484
 485         c = g_strdup(path);
 486         e = c;
 487         while ((e = strchr(e + 1, '/'))) {
 488             *e = '\0';
 489             if (!(ret = parse_mkdir(c, mode)))
 490                 goto parse_mkdir_path_end;
 491             *e = '/';
 492         }
 493         ret = parse_mkdir(c, mode);
 494
 495     parse_mkdir_path_end:
 496         g_free(c);
 497     }
 498
 499     return ret;
 500 }
 501
 502 const gchar* parse_xdg_config_home_path()
 503 {
 504     return xdg_config_home_path;
 505 }
 506
 507 const gchar* parse_xdg_data_home_path()
 508 {
 509     return xdg_data_home_path;
 510 }
 511
 512 GSList* parse_xdg_config_dir_paths()
 513 {
 514     return xdg_config_dir_paths;
 515 }
 516
 517 GSList* parse_xdg_data_dir_paths()
 518 {
 519     return xdg_data_dir_paths;
 520 }