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