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/* $Id$ */

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#ifndef SIGNS_H

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#define SIGNS_H

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#include "pool.h"

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typedef struct SignStruct {

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	StringID     str;

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	ViewportSign sign;

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	int32        x;

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	int32        y;

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	byte         z;

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							// OWNER_NONE for gray signs from old games.

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	uint16       index;

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} SignStruct;

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extern MemoryPool _sign_pool;

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/**

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 * Check if a Sign really exists.

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 */

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static inline bool IsValidSign(const SignStruct* ss)

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{

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	return ss->str != 0;

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}

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/**

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 * Get the pointer to the sign with index 'index'

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 */

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static inline SignStruct *GetSign(uint index)

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{

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	return (SignStruct*)GetItemFromPool(&_sign_pool, index);

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}

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/**

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 * Get the current size of the SignPool

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 */

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static inline uint16 GetSignPoolSize(void)

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{

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	return _sign_pool.total_items;

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}

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static inline bool IsSignIndex(uint index)

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{

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	return index < GetSignPoolSize();

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}

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#define FOR_ALL_SIGNS_FROM(ss, start) for (ss = GetSign(start); ss != NULL; ss = (ss->index + 1 < GetSignPoolSize()) ? GetSign(ss->index + 1) : NULL)

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#define FOR_ALL_SIGNS(ss) FOR_ALL_SIGNS_FROM(ss, 0)

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VARDEF SignStruct *_new_sign_struct;

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VARDEF bool _sign_sort_dirty;

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VARDEF uint16 *_sign_sort;

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void UpdateAllSignVirtCoords(void);

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void PlaceProc_Sign(TileIndex tile);

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/* misc.c */

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void ShowRenameSignWindow(const SignStruct *ss);

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#endif /* SIGNS_H */