/* Go through the given tags and determine the union of flags. Also remove
* any tags from the list that we don't know about */
unsigned int tagtransform::c_filter_basic_tags(OsmType type, const taglist_t &tags, int *polygon,
int *roads, const export_list &exlist,
taglist_t &out_tags, bool strict)
{
//assume we dont like this set of tags
int filter = 1;
int flags = 0;
int add_area_tag = 0;
OsmType export_type;
if (type == OSMTYPE_RELATION) {
export_type = OSMTYPE_WAY;
} else {
export_type = type;
}
const std::vector<taginfo> &infos = exlist.get(export_type);
/* We used to only go far enough to determine if it's a polygon or not,
but now we go through and filter stuff we don't need
pop each tag off and keep it in the temp list if we like it */
for (taglist_t::const_iterator item = tags.begin(); item != tags.end(); ++item) {
//if we want to do more than the export list says
if(!strict) {
if (type == OSMTYPE_RELATION && "type" == item->key) {
out_tags.push_back(*item);
filter = 0;
continue;
}
/* Allow named islands to appear as polygons */
if ("natural" == item->key && "coastline" == item->value) {
add_area_tag = 1;
/* Discard natural=coastline tags (we render these from a shapefile instead) */
if (!options->keep_coastlines) {
continue;
}
}
}
//go through the actual tags found on the item and keep the ones in the export list
size_t i = 0;
for (; i < infos.size(); i++) {
const taginfo &info = infos[i];
if (wildMatch(info.name.c_str(), item->key.c_str())) {
if (info.flags & FLAG_DELETE) {
break;
}
filter = 0;
flags |= info.flags;
out_tags.push_back(*item);
break;
}
}
// if we didn't find any tags that we wanted to export
// and we aren't strictly adhering to the list
if (i == infos.size() && !strict) {
if (options->hstore_mode != HSTORE_NONE) {
/* with hstore, copy all tags... */
out_tags.push_back(*item);
/* ... but if hstore_match_only is set then don't take this
as a reason for keeping the object */
if (!options->hstore_match_only && "osm_uid" != item->key
&& "osm_user" != item->key
&& "osm_timestamp" != item->key
&& "osm_version" != item->key
&& "osm_changeset" != item->key)
filter = 0;
} else if (options->hstore_columns.size() > 0) {
/* does this column match any of the hstore column prefixes? */
size_t j = 0;
for(; j < options->hstore_columns.size(); ++j) {
size_t pos = item->key.find(options->hstore_columns[j]);
if (pos == 0) {
out_tags.push_back(*item);
/* ... but if hstore_match_only is set then don't take this
as a reason for keeping the object */
if (!options->hstore_match_only
&& "osm_uid" != item->key
&& "osm_user" != item->key
&& "osm_timestamp" != item->key
&& "osm_version" != item->key
&& "osm_changeset" != item->key)
filter = 0;
break;
}
}
}
}
}
if (polygon) {
if (add_area_tag) {
/* If we need to force this as a polygon, append an area tag */
out_tags.push_dedupe(tag("area", "yes"));
*polygon = 1;
} else {
*polygon = tags.get_bool("area", flags & FLAG_POLYGON);
}
}
if (roads && !filter && (type == OSMTYPE_WAY)) {
add_z_order(out_tags, roads);
}
return filter;
}
