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(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 *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
 169     if (stat(path, &s) < 0)
 170         return FALSE;
 171
 172     /* XML_PARSE_BLANKS is needed apparently. When it loads a theme file,
 173        without this option, the tree is weird and has extra nodes in it. */
 174     if ((*doc = xmlReadFile(path, NULL,
 175                             XML_PARSE_NOBLANKS | XML_PARSE_RECOVER))) {
 176         *root = xmlDocGetRootElement(*doc);
 177         if (!*root) {
 178             xmlFreeDoc(*doc);
 179             *doc = NULL;
 180             g_message("%s is an empty document", path);
 181         } else {
 182             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 183                 xmlFreeDoc(*doc);
 184                 *doc = NULL;
 185                 g_message("XML Document %s is of wrong type. Root "
 186                           "node is not '%s'", path, rootname);
 187             }
 188         }
 189     }
 190     if (!*doc)
 191         return FALSE;
 192     return TRUE;
 193 }
 194
 195 gboolean parse_load_mem(gpointer data, guint len, const gchar *rootname,
 196                         xmlDocPtr *doc, xmlNodePtr *root)
 197 {
 198     if ((*doc = xmlParseMemory(data, len))) {
 199         *root = xmlDocGetRootElement(*doc);
 200         if (!*root) {
 201             xmlFreeDoc(*doc);
 202             *doc = NULL;
 203             g_message("Given memory is an empty document");
 204         } else {
 205             if (xmlStrcmp((*root)->name, (const xmlChar*)rootname)) {
 206                 xmlFreeDoc(*doc);
 207                 *doc = NULL;
 208                 g_message("XML Document in given memory is of wrong "
 209                           "type. Root node is not '%s'\n", rootname);
 210             }
 211         }
 212     }
 213     if (!*doc)
 214         return FALSE;
 215     return TRUE;
 216 }
 217
 218 void parse_close(xmlDocPtr doc)
 219 {
 220     xmlFreeDoc(doc);
 221 }
 222
 223 void parse_tree(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node)
 224 {
 225     while (node) {
 226         struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
 227
 228         if (c)
 229             c->func(i, doc, node, c->data);
 230
 231         node = node->next;
 232     }
 233 }
 234
 235 gchar *parse_string(xmlDocPtr doc, xmlNodePtr node)
 236 {
 237     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 238     gchar *s = g_strdup(c ? (gchar*)c : "");
 239     xmlFree(c);
 240     return s;
 241 }
 242
 243 gint parse_int(xmlDocPtr doc, xmlNodePtr node)
 244 {
 245     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 246     gint i = c ? atoi((gchar*)c) : 0;
 247     xmlFree(c);
 248     return i;
 249 }
 250
 251 gboolean parse_bool(xmlDocPtr doc, xmlNodePtr node)
 252 {
 253     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 254     gboolean b = FALSE;
 255     if (c && !xmlStrcasecmp(c, (const xmlChar*) "true"))
 256         b = TRUE;
 257     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "yes"))
 258         b = TRUE;
 259     else if (c && !xmlStrcasecmp(c, (const xmlChar*) "on"))
 260         b = TRUE;
 261     xmlFree(c);
 262     return b;
 263 }
 264
 265 gboolean parse_contains(const gchar *val, xmlDocPtr doc, xmlNodePtr node)
 266 {
 267     xmlChar *c = xmlNodeListGetString(doc, node->children, TRUE);
 268     gboolean r;
 269     r = !xmlStrcasecmp(c, (const xmlChar*) val);
 270     xmlFree(c);
 271     return r;
 272 }
 273
 274 xmlNodePtr parse_find_node(const gchar *tag, xmlNodePtr node)
 275 {
 276     while (node) {
 277         if (!xmlStrcmp(node->name, (const xmlChar*) tag))
 278             return node;
 279         node = node->next;
 280     }
 281     return NULL;
 282 }
 283
 284 gboolean parse_attr_bool(const gchar *name, xmlNodePtr node, gboolean *value)
 285 {
 286     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 287     gboolean r = FALSE;
 288     if (c) {
 289         if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
 290             *value = TRUE, r = TRUE;
 291         else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
 292             *value = TRUE, r = TRUE;
 293         else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
 294             *value = TRUE, r = TRUE;
 295         else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
 296             *value = FALSE, r = TRUE;
 297         else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
 298             *value = FALSE, r = TRUE;
 299         else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
 300             *value = FALSE, r = TRUE;
 301     }
 302     xmlFree(c);
 303     return r;
 304 }
 305
 306 gboolean parse_attr_int(const gchar *name, xmlNodePtr node, gint *value)
 307 {
 308     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 309     gboolean r = FALSE;
 310     if (c) {
 311         *value = atoi((gchar*)c);
 312         r = TRUE;
 313     }
 314     xmlFree(c);
 315     return r;
 316 }
 317
 318 gboolean parse_attr_string(const gchar *name, xmlNodePtr node, gchar **value)
 319 {
 320     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 321     gboolean r = FALSE;
 322     if (c) {
 323         *value = g_strdup((gchar*)c);
 324         r = TRUE;
 325     }
 326     xmlFree(c);
 327     return r;
 328 }
 329
 330 gboolean parse_attr_contains(const gchar *val, xmlNodePtr node,
 331                              const gchar *name)
 332 {
 333     xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
 334     gboolean r = FALSE;
 335     if (c)
 336         r = !xmlStrcasecmp(c, (const xmlChar*) val);
 337     xmlFree(c);
 338     return r;
 339 }
 340
 341 static gint slist_path_cmp(const gchar *a, const gchar *b)
 342 {
 343     return strcmp(a, b);
 344 }
 345
 346 typedef GSList* (*GSListFunc) (gpointer list, gconstpointer data);
 347
 348 static GSList* slist_path_add(GSList *list, gpointer data, GSListFunc func)
 349 {
 350     g_assert(func);
 351
 352     if (!data)
 353         return list;
 354
 355     if (!g_slist_find_custom(list, data, (GCompareFunc) slist_path_cmp))
 356         list = func(list, data);
 357     else
 358         g_free(data);
 359
 360     return list;
 361 }
 362
 363 static GSList* split_paths(const gchar *paths)
 364 {
 365     GSList *list = NULL;
 366     gchar **spl, **it;
 367
 368     if (!paths)
 369         return NULL;
 370     spl = g_strsplit(paths, ":", -1);
 371     for (it = spl; *it; ++it)
 372         list = slist_path_add(list, *it, (GSListFunc) g_slist_append);
 373     g_free(spl);
 374     return list;
 375 }
 376
 377 void parse_paths_startup(void)
 378 {
 379     const gchar *path;
 380
 381     if (xdg_start)
 382         return;
 383     xdg_start = TRUE;
 384
 385     path = g_getenv("XDG_CONFIG_HOME");
 386     if (path && path[0] != '\0') /* not unset or empty */
 387         xdg_config_home_path = g_build_filename(path, NULL);
 388     else
 389         xdg_config_home_path = g_build_filename(g_get_home_dir(), ".config",
 390                                                 NULL);
 391
 392     path = g_getenv("XDG_DATA_HOME");
 393     if (path && path[0] != '\0') /* not unset or empty */
 394         xdg_data_home_path = g_build_filename(path, NULL);
 395     else
 396         xdg_data_home_path = g_build_filename(g_get_home_dir(), ".local",
 397                                               "share", NULL);
 398
 399     path = g_getenv("XDG_CONFIG_DIRS");
 400     if (path && path[0] != '\0') /* not unset or empty */
 401         xdg_config_dir_paths = split_paths(path);
 402     else {
 403         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 404                                               g_strdup(CONFIGDIR),
 405                                               (GSListFunc) g_slist_append);
 406         xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 407                                               g_build_filename
 408                                               (G_DIR_SEPARATOR_S,
 409                                                "etc", "xdg", NULL),
 410                                               (GSListFunc) g_slist_append);
 411     }
 412     xdg_config_dir_paths = slist_path_add(xdg_config_dir_paths,
 413                                           g_strdup(xdg_config_home_path),
 414                                           (GSListFunc) g_slist_prepend);
 415
 416     path = g_getenv("XDG_DATA_DIRS");
 417     if (path && path[0] != '\0') /* not unset or empty */
 418         xdg_data_dir_paths = split_paths(path);
 419     else {
 420         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 421                                             g_strdup(DATADIR),
 422                                             (GSListFunc) g_slist_append);
 423         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 424                                             g_build_filename
 425                                             (G_DIR_SEPARATOR_S,
 426                                              "usr", "local", "share", NULL),
 427                                             (GSListFunc) g_slist_append);
 428         xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 429                                             g_build_filename
 430                                             (G_DIR_SEPARATOR_S,
 431                                              "usr", "share", NULL),
 432                                             (GSListFunc) g_slist_append);
 433     }
 434     xdg_data_dir_paths = slist_path_add(xdg_data_dir_paths,
 435                                         g_strdup(xdg_data_home_path),
 436                                         (GSListFunc) g_slist_prepend);
 437 }
 438
 439 void parse_paths_shutdown(void)
 440 {
 441     GSList *it;
 442
 443     if (!xdg_start)
 444         return;
 445     xdg_start = FALSE;
 446
 447     for (it = xdg_config_dir_paths; it; it = g_slist_next(it))
 448         g_free(it->data);
 449     g_slist_free(xdg_config_dir_paths);
 450     xdg_config_dir_paths = NULL;
 451     for (it = xdg_data_dir_paths; it; it = g_slist_next(it))
 452         g_free(it->data);
 453     g_slist_free(xdg_data_dir_paths);
 454     xdg_data_dir_paths = NULL;
 455     g_free(xdg_config_home_path);
 456     xdg_config_home_path = NULL;
 457     g_free(xdg_data_home_path);
 458     xdg_data_home_path = NULL;
 459 }
 460
 461 gchar *parse_expand_tilde(const gchar *f)
 462 {
 463     gchar **spl;
 464     gchar *ret;
 465
 466     if (!f)
 467         return NULL;
 468     spl = g_strsplit(f, "~", 0);
 469     ret = g_strjoinv(g_get_home_dir(), spl);
 470     g_strfreev(spl);
 471     return ret;
 472 }
 473
 474 gboolean parse_mkdir(const gchar *path, gint mode)
 475 {
 476     gboolean ret = TRUE;
 477
 478     g_return_val_if_fail(path != NULL, FALSE);
 479     g_return_val_if_fail(path[0] != '\0', FALSE);
 480
 481     if (!g_file_test(path, G_FILE_TEST_IS_DIR))
 482         if (mkdir(path, mode) == -1)
 483             ret = FALSE;
 484
 485     return ret;
 486 }
 487
 488 gboolean parse_mkdir_path(const gchar *path, gint mode)
 489 {
 490     gboolean ret = TRUE;
 491
 492     g_return_val_if_fail(path != NULL, FALSE);
 493     g_return_val_if_fail(path[0] == '/', FALSE);
 494
 495     if (!g_file_test(path, G_FILE_TEST_IS_DIR)) {
 496         gchar *c, *e;
 497
 498         c = g_strdup(path);
 499         e = c;
 500         while ((e = strchr(e + 1, '/'))) {
 501             *e = '\0';
 502             if (!(ret = parse_mkdir(c, mode)))
 503                 goto parse_mkdir_path_end;
 504             *e = '/';
 505         }
 506         ret = parse_mkdir(c, mode);
 507
 508     parse_mkdir_path_end:
 509         g_free(c);
 510     }
 511
 512     return ret;
 513 }
 514
 515 const gchar* parse_xdg_config_home_path(void)
 516 {
 517     return xdg_config_home_path;
 518 }
 519
 520 const gchar* parse_xdg_data_home_path(void)
 521 {
 522     return xdg_data_home_path;
 523 }
 524
 525 GSList* parse_xdg_config_dir_paths(void)
 526 {
 527     return xdg_config_dir_paths;
 528 }
 529
 530 GSList* parse_xdg_data_dir_paths(void)
 531 {
 532     return xdg_data_dir_paths;
 533 }