174 lines
3.6 KiB
C++
174 lines
3.6 KiB
C++
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// LuaChunkStay.cpp
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// Implements the cLuaChunkStay class representing a cChunkStay binding for plugins, used by cWorld:ChunkStay() Lua API
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#include "Globals.h"
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#include "LuaChunkStay.h"
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#include "PluginLua.h"
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cLuaChunkStay::cLuaChunkStay(cPluginLua & a_Plugin) :
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m_Plugin(a_Plugin),
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m_LuaState(nullptr)
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{
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}
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bool cLuaChunkStay::AddChunks(int a_ChunkCoordTableStackPos)
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{
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// This function is expected to be called just once, with all the coords in a table
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ASSERT(m_Chunks.empty());
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cPluginLua::cOperation Op(m_Plugin);
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cLuaState & L = Op();
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// Check that we got a table:
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if (!lua_istable(L, a_ChunkCoordTableStackPos))
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{
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LOGWARNING("%s: The parameter is not a table of coords (got %s). Ignoring the call.",
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__FUNCTION__, lua_typename(L, lua_type(L, a_ChunkCoordTableStackPos))
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);
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L.LogStackTrace();
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return false;
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}
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// Add each set of coords:
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int NumChunks = luaL_getn(L, a_ChunkCoordTableStackPos);
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m_Chunks.reserve(static_cast<size_t>(NumChunks));
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for (int idx = 1; idx <= NumChunks; idx++)
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{
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// Push the idx-th element of the array onto stack top, check that it's a table:
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lua_rawgeti(L, a_ChunkCoordTableStackPos, idx);
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if (!lua_istable(L, -1))
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{
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LOGWARNING("%s: Element #%d is not a table (got %s). Ignoring the element.",
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__FUNCTION__, idx, lua_typename(L, -1)
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);
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L.LogStackTrace();
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lua_pop(L, 1);
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continue;
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}
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AddChunkCoord(L, idx);
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lua_pop(L, 1);
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}
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// If there are no chunks, log a warning and return failure:
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if (m_Chunks.empty())
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{
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LOGWARNING("%s: Zero chunks to stay.", __FUNCTION__);
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L.LogStackTrace();
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return false;
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}
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// All ok
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return true;
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}
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void cLuaChunkStay::AddChunkCoord(cLuaState & L, int a_Index)
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{
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// Check that the element has 2 coords:
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int NumCoords = luaL_getn(L, -1);
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if (NumCoords != 2)
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{
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LOGWARNING("%s: Element #%d doesn't contain 2 coords (got %d). Ignoring the element.",
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__FUNCTION__, a_Index, NumCoords
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);
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return;
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}
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// Read the two coords from the element:
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lua_rawgeti(L, -1, 1);
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lua_rawgeti(L, -2, 2);
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int ChunkX = luaL_checkint(L, -2);
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int ChunkZ = luaL_checkint(L, -1);
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lua_pop(L, 2);
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// Check that a coord is not yet present:
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for (cChunkCoordsVector::iterator itr = m_Chunks.begin(), end = m_Chunks.end(); itr != end; ++itr)
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{
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if ((itr->m_ChunkX == ChunkX) && (itr->m_ChunkZ == ChunkZ))
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{
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LOGWARNING("%s: Element #%d is a duplicate, ignoring it.",
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__FUNCTION__, a_Index
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);
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return;
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}
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} // for itr - m_Chunks[]
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m_Chunks.push_back(cChunkCoords(ChunkX, ChunkZ));
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}
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void cLuaChunkStay::Enable(cChunkMap & a_ChunkMap, int a_OnChunkAvailableStackPos, int a_OnAllChunksAvailableStackPos)
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{
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// Get the references to the callback functions:
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m_LuaState = &m_Plugin.GetLuaState();
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m_OnChunkAvailable.RefStack(*m_LuaState, a_OnChunkAvailableStackPos);
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m_OnAllChunksAvailable.RefStack(*m_LuaState, a_OnAllChunksAvailableStackPos);
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// Enable the ChunkStay:
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super::Enable(a_ChunkMap);
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}
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void cLuaChunkStay::OnChunkAvailable(int a_ChunkX, int a_ChunkZ)
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{
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if (m_OnChunkAvailable.IsValid())
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{
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cPluginLua::cOperation Op(m_Plugin);
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Op().Call(static_cast<int>(m_OnChunkAvailable), a_ChunkX, a_ChunkZ);
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}
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}
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bool cLuaChunkStay::OnAllChunksAvailable(void)
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{
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if (m_OnAllChunksAvailable.IsValid())
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{
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// Call the callback:
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cPluginLua::cOperation Op(m_Plugin);
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Op().Call(static_cast<int>(m_OnAllChunksAvailable));
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// Remove the callback references - they won't be needed anymore
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m_OnChunkAvailable.UnRef();
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m_OnAllChunksAvailable.UnRef();
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}
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// Disable the ChunkStay by returning true
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return true;
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}
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void cLuaChunkStay::OnDisabled(void)
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{
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// This object is no longer needed, delete it
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delete this;
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}
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