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 *type, xmlDocPtr *doc, xmlNodePtr *root)
  83 {
  84     GSList *it;
  85     gboolean r = FALSE;
  86     gchar *fname;
  87
  88     if (type == NULL)
  89         fname = g_strdup("rc.xml");
  90     else
  91         fname = g_strdup_printf("rc-%s.xml", type);
  92
  93     for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
  94         gchar *path;
  95
  96         path = g_build_filename(it->data, "openbox", fname, NULL);
  97         r = parse_load(path, "openbox_config", doc, root);
  98         g_free(path);
  99     }
 100     g_free(fname);
 101
 102     return r;
 103 }
 104
 105 gboolean parse_load_theme(const gchar *name, xmlDocPtr *doc, xmlNodePtr *root,
 106                           gchar **retpath)
 107 {
 108     GSList *it;
 109     gchar *path;
 110     gboolean r = FALSE;
 111     gchar *eng;
 112
 113     /* backward compatibility.. */
 114     path = g_build_filename(g_get_home_dir(), ".themes", name,
 115                             "openbox-3", "themerc.xml", NULL);
 116     if (parse_load(path, "openbox_theme", doc, root) &&
 117         parse_attr_string("engine", *root, &eng))
 118     {
 119         if (!strcmp(eng, "box")) {
 120             *retpath = g_path_get_dirname(path);
 121             r = TRUE;
 122         }
 123         g_free(eng);
 124     }
 125     g_free(path);
 126
 127     if (!r) {
 128         for (it = xdg_data_dir_paths; !r && it; it = g_slist_next(it)) {
 129             path = g_build_filename(it->data, "themes", name, "openbox-3",
 130                                     "themerc.xml", NULL);
 131             if (parse_load(path, "openbox_theme", doc, root) &&
 132                 parse_attr_string("engine", *root, &eng))
 133             {
 134                 if (!strcmp(eng, "box")) {
 135                     *retpath = g_path_get_dirname(path);
 136                     r = TRUE;
 137                 }
 138                 g_free(eng);
 139             }
 140             g_free(path);
 141         }
 142     }
 143     return r;
 144 }
 145
 146 gboolean parse_load_menu(const gchar *file, xmlDocPtr *doc, xmlNodePtr *root)
 147 {
 148     GSList *it;
 149     gchar *path;
 150     gboolean r = FALSE;
 151
 152     if (file[0] == '/') {
 153         r = parse_load(file, "openbox_menu", doc, root);
 154     } else {
 155         for (it = xdg_config_dir_paths; !r && it; it = g_slist_next(it)) {
 156             path = g_build_filename(it->data, "openbox", file, NULL);
 157             r = parse_load(path, "openbox_menu", doc, root);
 158             g_free(path);
 159         }
 160     }
 161     return r;
 162 }
 163
 164 gboolean parse_load(const gchar *path, const gchar *rootname,
 165                     xmlDocPtr *doc, xmlNodePtr *root)
 166 {
 167     struct stat s;
 168     if (stat(path, &s) < 0)
 169         return FALSE;
 170
 171     /* XML_PARSE_BLANKS is needed apparently. When it loads a theme file,
 172        without this option, the tree is weird and has extra nodes in it. */
 173     if ((*doc = xmlReadFile(path, NULL,
 174                             XML_PARSE_NOBLANKS | XML_PARSE_RECOVER))) {
 175         *root = xmlDocGetRootElement(*doc);
 176         if (!*root) {
 177             xmlFreeDoc(*doc);
 178             *doc = NULL;
 179             g_message("%s is an empty document", path);
 180         } else {
 181             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 182                 xmlFreeDoc(*doc);
 183                 *doc = NULL;
 184                 g_message("XML Document %s is of wrong type. Root "
 185                           "node is not '%s'", path, rootname);
 186             }
 187         }
 188     }
 189     if (!*doc)
 190         return FALSE;
 191     return TRUE;
 192 }
 193
 194 gboolean parse_load_mem(gpointer data, guint len, const gchar *rootname,
 195                         xmlDocPtr *doc, xmlNodePtr *root)
 196 {
 197     if ((*doc = xmlParseMemory(data, len))) {
 198         *root = xmlDocGetRootElement(*doc);
 199         if (!*root) {
 200             xmlFreeDoc(*doc);
 201             *doc = NULL;
 202             g_message("Given memory is an empty document");
 203         } else {
 204             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 205                 xmlFreeDoc(*doc);
 206                 *doc = NULL;
 207                 g_message("XML Document in given memory is of wrong "
 208                           "type. Root node is not '%s'\n", rootname);
 209             }
 210         }
 211     }
 212     if (!*doc)
 213         return FALSE;
 214     return TRUE;
 215 }
 216
 217 void parse_close(xmlDocPtr doc)
 218 {
 219     xmlFreeDoc(doc);
 220 }
 221
 222 void parse_tree(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node)
 223 {
 224     while (node) {
 225         struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
 226
 227         if (c)
 228             c->func(i, doc, node, c->data);
 229
 230         node = node->next;
 231     }
 232 }
 233
 234 gchar *parse_string(xmlDocPtr doc, xmlNodePtr node)
 235 {
 236     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 237     gchar *s = g_strdup(c ? (gchar*)c : "");
 238     xmlFree(c);
 239     return s;
 240 }
 241
 242 gint parse_int(xmlDocPtr doc, xmlNodePtr node)
 243 {
 244     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 245     gint i = c ? atoi((gchar*)c) : 0;
 246     xmlFree(c);
 247     return i;
 248 }
 249
 250 gboolean parse_bool(xmlDocPtr doc, xmlNodePtr node)
 251 {
 252     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 253     gboolean b = FALSE;
 254     if (c && !xmlStrcasecmp(c, (const xmlChar*) "true"))
 255         b = TRUE;
 256     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "yes"))
 257         b = TRUE;
 258     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "on"))
 259         b = TRUE;
 260     xmlFree(c);
 261     return b;
 262 }
 263
 264 gboolean parse_contains(const gchar *val, xmlDocPtr doc, xmlNodePtr node)
 265 {
 266     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 267     gboolean r;
 268     r = !xmlStrcasecmp(c, (const xmlChar*) val);
 269     xmlFree(c);
 270     return r;
 271 }
 272
 273 xmlNodePtr parse_find_node(const gchar *tag, xmlNodePtr node)
 274 {
 275     while (node) {
 276         if (!xmlStrcmp(node->name, (const xmlChar*) tag))
 277             return node;
 278         node = node->next;
 279     }
 280     return NULL;
 281 }
 282
 283 gboolean parse_attr_bool(const gchar *name, xmlNodePtr node, gboolean *value)
 284 {
 285     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 286     gboolean r = FALSE;
 287     if (c) {
 288         if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 289             *value = TRUE, r = TRUE;
 290         else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 291             *value = TRUE, r = TRUE;
 292         else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 293             *value = TRUE, r = TRUE;
 294         else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
 295             *value = FALSE, r = TRUE;
 296         else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
 297             *value = FALSE, r = TRUE;
 298         else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
 299             *value = FALSE, r = TRUE;
 300     }
 301     xmlFree(c);
 302     return r;
 303 }
 304
 305 gboolean parse_attr_int(const gchar *name, xmlNodePtr node, gint *value)
 306 {
 307     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 308     gboolean r = FALSE;
 309     if (c) {
 310         *value = atoi((gchar*)c);
 311         r = TRUE;
 312     }
 313     xmlFree(c);
 314     return r;
 315 }
 316
 317 gboolean parse_attr_string(const gchar *name, xmlNodePtr node, gchar **value)
 318 {
 319     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 320     gboolean r = FALSE;
 321     if (c) {
 322         *value = g_strdup((gchar*)c);
 323         r = TRUE;
 324     }
 325     xmlFree(c);
 326     return r;
 327 }
 328
 329 gboolean parse_attr_contains(const gchar *val, xmlNodePtr node,
 330                              const gchar *name)
 331 {
 332     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 333     gboolean r = FALSE;
 334     if (c)
 335         r = !xmlStrcasecmp(c, (const xmlChar*) val);
 336     xmlFree(c);
 337     return r;
 338 }
 339
 340 static gint slist_path_cmp(const gchar *a, const gchar *b)
 341 {
 342     return strcmp(a, b);
 343 }
 344
 345 typedef GSList* (*GSListFunc) (gpointer list, gconstpointer data);
 346
 347 static GSList* slist_path_add(GSList *list, gpointer data, GSListFunc func)
 348 {
 349     g_assert(func);
 350
 351     if (!data)
 352         return list;
 353
 354     if (!g_slist_find_custom(list, data, (GCompareFunc) slist_path_cmp))
 355         list = func(list, data);
 356     else
 357         g_free(data);
 358
 359     return list;
 360 }
 361
 362 static GSList* split_paths(const gchar *paths)
 363 {
 364     GSList *list = NULL;
 365     gchar **spl, **it;
 366
 367     if (!paths)
 368         return NULL;
 369     spl = g_strsplit(paths, ":", -1);
 370     for (it = spl; *it; ++it)
 371         list = slist_path_add(list, *it, (GSListFunc) g_slist_append);
 372     g_free(spl);
 373     return list;
 374 }
 375
 376 void parse_paths_startup()
 377 {
 378     const gchar *path;
 379
 380     if (xdg_start)
 381         return;
 382     xdg_start = TRUE;
 383
 384     path = g_getenv("XDG_CONFIG_HOME");
 385     if (path && path[0] != '\0') /* not unset or empty */
 386         xdg_config_home_path = g_build_filename(path, NULL);
 387     else
 388         xdg_config_home_path = g_build_filename(g_get_home_dir(), ".config",
 389                                                 NULL);
 390
 391     path = g_getenv("XDG_DATA_HOME");
 392     if (path && path[0] != '\0') /* not unset or empty */
 393         xdg_data_home_path = g_build_filename(path, NULL);
 394     else
 395         xdg_data_home_path = g_build_filename(g_get_home_dir(), ".local",
 396                                               "share", NULL);
 397
 398     path = g_getenv("XDG_CONFIG_DIRS");
 399     if (path && path[0] != '\0') /* not unset or empty */
 400         xdg_config_dir_paths = split_paths(path);
 401     else {
 402         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 403                                               g_strdup(CONFIGDIR),
 404                                               (GSListFunc) g_slist_append);
 405         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 406                                               g_build_filename
 407                                               (G_DIR_SEPARATOR_S,
 408                                                "etc", "xdg", NULL),
 409                                               (GSListFunc) g_slist_append);
 410     }
 411     xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 412                                           g_strdup(xdg_config_home_path),
 413                                           (GSListFunc) g_slist_prepend);
 414
 415     path = g_getenv("XDG_DATA_DIRS");
 416     if (path && path[0] != '\0') /* not unset or empty */
 417         xdg_data_dir_paths = split_paths(path);
 418     else {
 419         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 420                                             g_strdup(DATADIR),
 421                                             (GSListFunc) g_slist_append);
 422         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 423                                             g_build_filename
 424                                             (G_DIR_SEPARATOR_S,
 425                                              "usr", "local", "share", NULL),
 426                                             (GSListFunc) g_slist_append);
 427         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 428                                             g_build_filename
 429                                             (G_DIR_SEPARATOR_S,
 430                                              "usr", "share", NULL),
 431                                             (GSListFunc) g_slist_append);
 432     }
 433     xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 434                                         g_strdup(xdg_data_home_path),
 435                                         (GSListFunc) g_slist_prepend);
 436 }
 437
 438 void parse_paths_shutdown()
 439 {
 440     GSList *it;
 441
 442     if (!xdg_start)
 443         return;
 444     xdg_start = FALSE;
 445
 446     for (it = xdg_config_dir_paths; it; it = g_slist_next(it))
 447         g_free(it->data);
 448     g_slist_free(xdg_config_dir_paths);
 449     xdg_config_dir_paths = NULL;
 450     for (it = xdg_data_dir_paths; it; it = g_slist_next(it))
 451         g_free(it->data);
 452     g_slist_free(xdg_data_dir_paths);
 453     xdg_data_dir_paths = NULL;
 454     g_free(xdg_config_home_path);
 455     xdg_config_home_path = NULL;
 456     g_free(xdg_data_home_path);
 457     xdg_data_home_path = NULL;
 458 }
 459
 460 gchar *parse_expand_tilde(const gchar *f)
 461 {
 462     gchar **spl;
 463     gchar *ret;
 464
 465     if (!f)
 466         return NULL;
 467     spl = g_strsplit(f, "~", 0);
 468     ret = g_strjoinv(g_get_home_dir(), spl);
 469     g_strfreev(spl);
 470     return ret;
 471 }
 472
 473 gboolean parse_mkdir(const gchar *path, gint mode)
 474 {
 475     gboolean ret = TRUE;
 476
 477     g_return_val_if_fail(path != NULL, FALSE);
 478     g_return_val_if_fail(path[0] != '\0', FALSE);
 479
 480     if (!g_file_test(path, G_FILE_TEST_IS_DIR))
 481         if (mkdir(path, mode) == -1)
 482             ret = FALSE;
 483
 484     return ret;
 485 }
 486
 487 gboolean parse_mkdir_path(const gchar *path, gint mode)
 488 {
 489     gboolean ret = TRUE;
 490
 491     g_return_val_if_fail(path != NULL, FALSE);
 492     g_return_val_if_fail(path[0] == '/', FALSE);
 493
 494     if (!g_file_test(path, G_FILE_TEST_IS_DIR)) {
 495         gchar *c, *e;
 496
 497         c = g_strdup(path);
 498         e = c;
 499         while ((e = strchr(e + 1, '/'))) {
 500             *e = '\0';
 501             if (!(ret = parse_mkdir(c, mode)))
 502                 goto parse_mkdir_path_end;
 503             *e = '/';
 504         }
 505         ret = parse_mkdir(c, mode);
 506
 507     parse_mkdir_path_end:
 508         g_free(c);
 509     }
 510
 511     return ret;
 512 }
 513
 514 const gchar* parse_xdg_config_home_path()
 515 {
 516     return xdg_config_home_path;
 517 }
 518
 519 const gchar* parse_xdg_data_home_path()
 520 {
 521     return xdg_data_home_path;
 522 }
 523
 524 GSList* parse_xdg_config_dir_paths()
 525 {
 526     return xdg_config_dir_paths;
 527 }
 528
 529 GSList* parse_xdg_data_dir_paths()
 530 {
 531     return xdg_data_dir_paths;
 532 }