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#pragma once
#include "indexer/index.hpp"
#include "geometry/point2d.hpp"
#include "geometry/rect2d.hpp"
#include "geometry/tree4d.hpp"
#include "std/set.hpp"
class Index;
namespace search
{
struct LocalityItem
{
m2::RectD m_rect;
string m_name;
uint32_t m_population;
typedef uint32_t ID;
ID m_id;
LocalityItem(m2::RectD const & rect, uint32_t population, ID id, string const & name);
m2::RectD const & GetLimitRect() const { return m_rect; }
};
class LocalityFinder
{
struct Cache
{
m4::Tree<LocalityItem> m_tree;
set<LocalityItem::ID> m_loaded;
mutable uint32_t m_usage;
m2::RectD m_rect;
Cache() : m_usage(0) {}
void Clear();
void GetLocality(m2::PointD const & pt, string & name) const;
};
public:
LocalityFinder(Index const * pIndex);
void SetLanguage(int8_t lang)
{
if (m_lang != lang)
{
ClearCacheAll();
m_lang = lang;
}
}
void SetViewportByIndex(m2::RectD const & viewport, size_t idx);
/// Set new viewport for the reserved slot only if it's no a part of the previous one.
void SetReservedViewportIfNeeded(m2::RectD const & viewport);
/// Check for localities in pre-cached viewports only.
void GetLocalityInViewport(m2::PointD const & pt, string & name) const;
/// Check for localities in all Index and make new cache if needed.
void GetLocalityCreateCache(m2::PointD const & pt, string & name);
void ClearCacheAll();
void ClearCache(size_t idx);
protected:
void CorrectMinimalRect(m2::RectD & rect) const;
void RecreateCache(Cache & cache, m2::RectD rect) const;
private:
friend class DoLoader;
Index const * m_pIndex;
enum { MAX_VIEWPORT_COUNT = 3 };
Cache m_cache[MAX_VIEWPORT_COUNT];
int8_t m_lang;
};
} // namespace search
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