2 * Navit, a modular navigation system.
3 * Copyright (C) 2005-2008 Navit Team
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
22 * @brief Contains code that makes navit able to load maps
24 * This file contains the code that makes navit able to load maps. Because
25 * navit is able to open maps in different formats, this code does not handle
26 * any map format itself. This is done by map plugins which register to this
27 * code by calling plugin_register_map_type().
29 * When opening a new map, the map plugin will return a pointer to a map_priv
30 * struct, which can be defined by the map plugin and contains whatever private
31 * data the map plugin needs to access the map. This pointer will also be used
32 * as a "handle" to access the map opened.
34 * A common task is to create a "map rect". A map rect is a rectangular part of
35 * the map, that one can for example retrieve items from. It is not possible to
36 * retrieve items directly from the complete map. Creating a map rect returns a
37 * pointer to a map_rect_priv, which contains private data for the map rect and
38 * will be used as "handle" for this map rect.
45 #include "projection.h"
49 #include "transform.h"
55 * @brief Holds information about a map
57 * This structure holds information about a map.
60 struct map_methods meth; /**< Structure with pointers to the map plugin's functions */
61 struct map_priv *priv; /**< Private data of the map, only known to the map plugin */
62 struct attr **attrs; /**< Attributes of this map */
63 struct callback_list *attr_cbl; /**< List of callbacks that are called when attributes change */
68 * @brief Describes a rectangular extract of a map
70 * This structure describes a rectangular extract of a map.
73 struct map *m; /**< The map this extract is from */
74 struct map_rect_priv *priv; /**< Private data of this map rect, only known to the map plugin */
78 * @brief Opens a new map
80 * This function opens a new map based on the attributes passed. This function
81 * takes the attribute "attr_type" to determine which type of map to open and passes
82 * all attributes to the map plugin's function that was specified in the
83 * plugin_register_new_map_type()-call.
85 * Note that every plugin should accept an attribute of type "attr_data" to be passed
86 * with the filename of the map to be opened as value.
88 * @param attrs Attributes specifying which map to open, see description
89 * @return The opened map or NULL on failure
92 map_new(struct attr *parent, struct attr **attrs)
95 struct map_priv *(*maptype_new)(struct map_methods *meth, struct attr **attrs, struct callback_list *cbl);
96 struct attr *type=attr_search(attrs, NULL, attr_type);
99 dbg(0,"missing type\n");
102 maptype_new=plugin_get_map_type(type->u.str);
104 dbg(0,"invalid type '%s'\n", type->u.str);
108 m=g_new0(struct map, 1);
109 m->attrs=attr_list_dup(attrs);
110 m->attr_cbl=callback_list_new();
111 m->priv=maptype_new(&m->meth, attrs, m->attr_cbl);
124 map_ref(struct map* m)
131 * @brief Gets an attribute from a map
133 * @param this_ The map the attribute should be read from
134 * @param type The type of the attribute to be read
135 * @param attr Pointer to an attrib-structure where the attribute should be written to
136 * @param iter (NOT IMPLEMENTED) Used to iterate through all attributes of a type. Set this to NULL to get the first attribute, set this to an attr_iter to get the next attribute
137 * @return True if the attribute type was found, false if not
140 map_get_attr(struct map *this_, enum attr_type type, struct attr *attr, struct attr_iter *iter)
143 if (this_->meth.map_get_attr)
144 ret=this_->meth.map_get_attr(this_->priv, type, attr);
146 ret=attr_generic_get_attr(this_->attrs, NULL, type, attr, iter);
151 * @brief Sets an attribute of a map
153 * This sets an attribute of a map, overwriting an attribute of the same type if it
154 * already exists. This function also calls all the callbacks that are registred
155 * to be called when attributes change.
157 * @param this_ The map to set the attribute of
158 * @param attr The attribute to set
159 * @return True if the attr could be set, false otherwise
162 map_set_attr(struct map *this_, struct attr *attr)
164 this_->attrs=attr_generic_set_attr(this_->attrs, attr);
165 if (this_->meth.map_set_attr)
166 this_->meth.map_set_attr(this_->priv, attr);
167 callback_list_call_attr_2(this_->attr_cbl, attr->type, this_, attr);
172 * @brief Registers a new callback for attribute-change
174 * This function registers a new callback function that should be called if the attributes
177 * @param this_ The map to associate the callback with
178 * @param cb The callback to add
181 map_add_callback(struct map *this_, struct callback *cb)
183 callback_list_add(this_->attr_cbl, cb);
187 * @brief Removes a callback from the list of attribute-change callbacks
189 * This function removes one callback from the list of callbacks functions that should be called
190 * when attributes of the map change.
192 * @param this_ The map to remove the callback from
193 * @param cb The callback to remove
196 map_remove_callback(struct map *this_, struct callback *cb)
198 callback_list_remove(this_->attr_cbl, cb);
203 * @brief Checks if strings from a map have to be converted
205 * @param this_ Map to be checked for the need to convert strings
206 * @return True if strings from the map have to be converted, false otherwise
209 map_requires_conversion(struct map *this_)
211 return (this_->meth.charset != NULL && strcmp(this_->meth.charset, "utf-8"));
215 * @brief Converts a string from a map
217 * @param this_ The map the string to be converted is from
218 * @param str The string to be converted
219 * @return The converted string. It has to be map_convert_free()d after use.
222 map_convert_string(struct map *this_, char *str)
224 return g_convert(str, -1,"utf-8",this_->meth.charset,NULL,NULL,NULL);
228 * @brief Frees the memory allocated for a converted string
230 * @param str The string to be freed
233 map_convert_free(char *str)
239 * @brief Returns the projection of a map
241 * @param this_ The map to return the projection of
242 * @return The projection of the map
245 map_projection(struct map *this_)
247 return this_->meth.pro;
251 * @brief Sets the projection of a map
253 * @param this_ The map to set the projection of
254 * @param pro The projection to be set
257 map_set_projection(struct map *this_, enum projection pro)
263 map_destroy_do(struct map *m)
266 m->meth.map_destroy(m->priv);
267 attr_list_free(m->attrs);
268 callback_list_destroy(m->attr_cbl);
273 * @brief Destroys an opened map
275 * @param m The map to be destroyed
278 map_destroy(struct map *m)
286 if(0 == m->refcount) {
292 * @brief Creates a new map rect
294 * This creates a new map rect, which can be used to retrieve items from a map. If
295 * sel is a linked-list of selections, all of them will be used. If you pass NULL as
296 * sel, this means "get me the whole map".
298 * @param m The map to build the rect on
299 * @param sel Map selection to choose the rectangle - may be NULL, see description
300 * @return A new map rect
303 map_rect_new(struct map *m, struct map_selection *sel)
308 printf("map_rect_new 0x%x,0x%x-0x%x,0x%x\n", r->lu.x, r->lu.y, r->rl.x, r->rl.y);
310 mr=g_new0(struct map_rect, 1);
312 mr->priv=m->meth.map_rect_new(m->priv, sel);
322 * @brief Gets the next item from a map rect
324 * Returns an item from a map rect and advances the "item pointer" one step further,
325 * so that at the next call the next item is returned. Returns NULL if there are no more items.
327 * @param mr The map rect to return an item from
328 * @return An item from the map rect
331 map_rect_get_item(struct map_rect *mr)
334 dbg_assert(mr != NULL);
335 dbg_assert(mr->m != NULL);
336 dbg_assert(mr->m->meth.map_rect_get_item != NULL);
337 ret=mr->m->meth.map_rect_get_item(mr->priv);
344 * @brief Returns the item specified by the ID
346 * @param mr The map rect to search for the item
347 * @param id_hi High part of the ID to be found
348 * @param id_lo Low part of the ID to be found
349 * @return The item with the specified ID or NULL if not found
352 map_rect_get_item_byid(struct map_rect *mr, int id_hi, int id_lo)
354 struct item *ret=NULL;
355 dbg_assert(mr != NULL);
356 dbg_assert(mr->m != NULL);
357 if (mr->m->meth.map_rect_get_item_byid)
358 ret=mr->m->meth.map_rect_get_item_byid(mr->priv, id_hi, id_lo);
365 * @brief Destroys a map rect
367 * @param mr The map rect to be destroyed
370 map_rect_destroy(struct map_rect *mr)
373 mr->m->meth.map_rect_destroy(mr->priv);
379 * @brief Holds information about a search on a map
381 * This structure holds information about a search performed on a map. This can be
382 * used as "handle" to retrieve items from a search.
386 struct attr search_attr;
391 * @brief Starts a search on a map
393 * This function starts a search on a map. What attributes one can search for depends on the
396 * The OSM/binfile plugin currently supports: attr_town_name, attr_street_name
397 * The MG plugin currently supports: ttr_town_postal, attr_town_name, attr_street_name
399 * If you enable partial matches bear in mind that the search matches only the begin of the
400 * strings - a search for a street named "street" would match to "streetfoo", but not to
401 * "somestreet". Search is case insensitive.
403 * The item passed to this function specifies a "superior item" to "search within" - e.g. a town
404 * in which we want to search for a street, or a country in which to search for a town.
406 * Please also note that the search for countries is not handled by map plugins but by navit internally -
407 * have a look into country.c for details. Because of that every map plugin has to accept a country item
408 * to be passed as "superior item".
410 * Note: If you change something here, please make sure to also update the documentation of mapset_search_new()
413 * @param m The map that should be searched
414 * @param item Specifies a superior item to "search within" (see description)
415 * @param search_attr Attribute specifying what to search for. See description.
416 * @param partial Set this to true to also have partial matches. See description.
417 * @return A new map search struct for this search
420 map_search_new(struct map *m, struct item *item, struct attr *search_attr, int partial)
422 struct map_search *this_;
423 dbg(1,"enter(%p,%p,%p,%d)\n", m, item, search_attr, partial);
424 dbg(1,"0x%x 0x%x 0x%x\n", attr_country_all, search_attr->type, attr_country_name);
425 this_=g_new0(struct map_search,1);
427 this_->search_attr=*search_attr;
428 if ((search_attr->type >= attr_country_all && search_attr->type <= attr_country_name) || search_attr->type == attr_country_id)
429 this_->priv=country_search_new(&this_->search_attr, partial);
431 if (m->meth.map_search_new) {
433 this_->search_attr.u.str=g_convert(this_->search_attr.u.str, -1,m->meth.charset,"utf-8",NULL,NULL,NULL);
434 this_->priv=m->meth.map_search_new(m->priv, item, &this_->search_attr, partial);
448 * @brief Returns an item from a map search
450 * This returns an item of the result of a search on a map and advances the "item pointer" one step,
451 * so that at the next call the next item will be returned. If there are no more items in the result
454 * @param this_ Map search struct of the search
455 * @return One item of the result
458 map_search_get_item(struct map_search *this_)
464 if ((this_->search_attr.type >= attr_country_all && this_->search_attr.type <= attr_country_name) || this_->search_attr.type == attr_country_id)
465 return country_search_get_item(this_->priv);
466 ret=this_->m->meth.map_search_get_item(this_->priv);
473 * @brief Destroys a map search struct
475 * @param this_ The map search struct to be destroyed
478 map_search_destroy(struct map_search *this_)
482 if (this_->search_attr.type >= attr_country_all && this_->search_attr.type <= attr_country_name)
483 country_search_destroy(this_->priv);
485 if (this_->m->meth.charset)
486 g_free(this_->search_attr.u.str);
487 this_->m->meth.map_search_destroy(this_->priv);
493 * @brief Creates a new rectangular map selection
495 * @param center Coordinates of the center of the new rectangle
496 * @param distance Distance of the rectangle's borders from the center
497 * @param order Desired order of the new selection
498 * @return The new map selection
500 struct map_selection *
501 map_selection_rect_new(struct pcoord *center, int distance, int order)
503 struct map_selection *ret=g_new0(struct map_selection, 1);
505 ret->range=item_range_all;
506 ret->u.c_rect.lu.x=center->x-distance;
507 ret->u.c_rect.lu.y=center->y+distance;
508 ret->u.c_rect.rl.x=center->x+distance;
509 ret->u.c_rect.rl.y=center->y-distance;
514 * @brief Duplicates a map selection, transforming coordinates
516 * This duplicates a map selection and at the same time transforms the internal
517 * coordinates of the selection from one projection to another.
519 * @param sel The map selection to be duplicated
520 * @param from The projection used for the selection at the moment
521 * @param to The projection that should be used for the duplicated selection
522 * @return A duplicated, transformed map selection
524 struct map_selection *
525 map_selection_dup_pro(struct map_selection *sel, enum projection from, enum projection to)
527 struct map_selection *next,**last;
528 struct map_selection *ret=NULL;
531 next = g_new(struct map_selection, 1);
533 if (from != projection_none || to != projection_none) {
534 transform_from_to(&sel->u.c_rect.lu, from, &next->u.c_rect.lu, to);
535 transform_from_to(&sel->u.c_rect.rl, from, &next->u.c_rect.rl, to);
545 * @brief Duplicates a map selection
547 * @param sel The map selection to duplicate
548 * @return The duplicated map selection
550 struct map_selection *
551 map_selection_dup(struct map_selection *sel)
553 return map_selection_dup_pro(sel, projection_none, projection_none);
557 * @brief Destroys a map selection
559 * @param sel The map selection to be destroyed
562 map_selection_destroy(struct map_selection *sel)
564 struct map_selection *next;
573 * @brief Checks if a selection contains a rectangle containing an item
575 * This function checks if a selection contains a rectangle which exactly contains
576 * an item. The rectangle is automatically built around the given item.
578 * @param sel The selection to be checked
579 * @param item The item that the rectangle should be built around
580 * @return True if the rectangle is within the selection, false otherwise
583 map_selection_contains_item_rect(struct map_selection *sel, struct item *item)
588 while (item_coord_get(item, &c, 1)) {
593 coord_rect_extend(&r, &c);
598 return map_selection_contains_rect(sel, &r);
604 * @brief Checks if a selection contains a item range
606 * This function checks if a selection contains at least one of the items in range
608 * @param sel The selection to be checked
609 * @param follow Whether the next pointer of the selection should be followed
610 * @param ranges The item ranges to be checked
611 * @count the number of elements in ranges
612 * @return True if there is a match, false otherwise
616 map_selection_contains_item_range(struct map_selection *sel, int follow, struct item_range *range, int count)
622 for (i = 0 ; i < count ; i++) {
623 if (item_range_intersects_range(&sel->range, &range[i]))
633 * @brief Checks if a selection contains a item
635 * This function checks if a selection contains a item type
637 * @param sel The selection to be checked
638 * @param follow Whether the next pointer of the selection should be followed
639 * @param item The item type to be checked
640 * @return True if there is a match, false otherwise
644 map_selection_contains_item(struct map_selection *sel, int follow, enum item_type type)
649 if (item_range_contains_item(&sel->range, type))
661 * @brief Checks if a pointer points to the private data of a map
663 * @param map The map whose private data should be checked.
664 * @param priv The private data that should be checked.
665 * @return True if priv is the private data of map
668 map_priv_is(struct map *map, struct map_priv *priv)
670 return (map->priv == priv);
674 map_dump_filedesc(struct map *map, FILE *out)
676 struct map_rect *mr=map_rect_new(map, NULL);
679 while ((item = map_rect_get_item(mr)))
680 item_dump_filedesc(item, map, out);
681 map_rect_destroy(mr);
685 map_dump_file(struct map *map, const char *file)
690 map_dump_filedesc(map, f);
693 dbg(0,"failed to open file '%s'\n",file);
697 map_dump(struct map *map)
699 map_dump_filedesc(map, stdout);
703 map_rect_create_item(struct map_rect *mr, enum item_type type_)
705 if(mr && mr->priv && mr->m) {
706 return mr->m->meth.map_rect_create_item(mr->priv, type_) ;