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