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// LuaChunkStay.h
// Declares the cLuaChunkStay class representing a cChunkStay binding for plugins, used by cWorld:ChunkStay() Lua API
#pragma once
#include "LuaState.h"
#include "../ChunkStay.h"
// fwd:
class cPluginLua;
class cChunkMap;
class cLuaChunkStay
: public cChunkStay
{
typedef cChunkStay super;
public:
cLuaChunkStay(cPluginLua & a_Plugin);
~cLuaChunkStay() { }
/** Adds chunks in the specified on-stack Lua table.
Returns true if any chunk added, false (plus log warning) if none. */
bool AddChunks(int a_ChunkCoordTableStackPos);
/** Enables the ChunkStay for the specified chunkmap, with the specified Lua callbacks. */
void Enable(cChunkMap & a_ChunkMap, int a_OnChunkAvailableStackPos, int a_OnAllChunksAvailableStackPos);
protected:
/** The plugin which has created the ChunkStay, via cWorld:ChunkStay() binding method. */
cPluginLua & m_Plugin;
/** The Lua state associated with the callbacks. Only valid when enabled. */
cLuaState * m_LuaState;
/** The Lua function to call in OnChunkAvailable. Only valid when enabled. */
cLuaState::cRef m_OnChunkAvailable;
/** The Lua function to call in OnAllChunksAvailable. Only valid when enabled. */
cLuaState::cRef m_OnAllChunksAvailable;
// cChunkStay overrides:
virtual void OnChunkAvailable(int a_ChunkX, int a_ChunkZ) override;
virtual bool OnAllChunksAvailable(void) override;
virtual void OnDisabled(void) override;
/** Adds a single chunk coord from the table at the top of the Lua stack.
Expects the top element to be a table, checks that it contains two numbers.
Uses those two numbers as chunk coords appended to m_Chunks.
If the coords are already present, gives a warning and ignores the pair.
The a_Index parameter is only for the error messages. */
void AddChunkCoord(cLuaState & a_LuaState, int a_Index);
} ;
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