From c52f299e724bf893944553ac3aeedf7bf0a58241 Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@outlook.com>
Date: Sun, 2 Jan 2022 11:56:36 +0000
Subject: Handlers: update item and block handlers (#5371)

+ Resend blocks when server rejects placement because in a block

* Fix chest handler not invoked, fixes #5367
* Fix comparator handler not invoked
* Update some naming
---
 src/Blocks/BlockSugarCane.h | 140 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 src/Blocks/BlockSugarCane.h

(limited to 'src/Blocks/BlockSugarCane.h')

diff --git a/src/Blocks/BlockSugarCane.h b/src/Blocks/BlockSugarCane.h
new file mode 100644
index 000000000..cffe667e5
--- /dev/null
+++ b/src/Blocks/BlockSugarCane.h
@@ -0,0 +1,140 @@
+
+#pragma once
+
+#include "BlockPlant.h"
+
+
+
+
+
+class cBlockSugarCaneHandler final :
+	public cBlockPlant<false>
+{
+	using Super = cBlockPlant<false>;
+
+public:
+
+	using Super::Super;
+
+private:
+
+	virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
+	{
+		return cItem(E_ITEM_SUGARCANE, 1, 0);
+	}
+
+
+
+
+
+	virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
+	{
+		if (a_Position.y <= 0)
+		{
+			return false;
+		}
+
+		switch (a_Chunk.GetBlock(a_Position.addedY(-1)))
+		{
+			case E_BLOCK_DIRT:
+			case E_BLOCK_GRASS:
+			case E_BLOCK_FARMLAND:
+			case E_BLOCK_SAND:
+			{
+				static const Vector3i Coords[] =
+				{
+					{-1, -1,  0},
+					{ 1, -1,  0},
+					{ 0, -1, -1},
+					{ 0, -1,  1},
+				} ;
+				for (size_t i = 0; i < ARRAYCOUNT(Coords); i++)
+				{
+					BLOCKTYPE BlockType;
+					NIBBLETYPE BlockMeta;
+					if (!a_Chunk.UnboundedRelGetBlock(a_Position + Coords[i], BlockType, BlockMeta))
+					{
+						// Too close to the edge, cannot simulate
+						return true;
+					}
+					if (IsBlockWater(BlockType) || (BlockType == E_BLOCK_FROSTED_ICE))
+					{
+						return true;
+					}
+				}  // for i - Coords[]
+				// Not directly neighboring a water block
+				return false;
+			}
+			case E_BLOCK_SUGARCANE:
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+
+
+
+
+	virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
+	{
+		UNUSED(a_Meta);
+		return 7;
+	}
+
+
+
+
+
+	virtual int Grow(cChunk & a_Chunk, Vector3i a_RelPos, int a_NumStages = 1) const override
+	{
+		// Check the total height of the sugarcane blocks here:
+		int top = a_RelPos.y + 1;
+		while (
+			(top < cChunkDef::Height) &&
+			(a_Chunk.GetBlock({a_RelPos.x, top, a_RelPos.z}) == E_BLOCK_SUGARCANE)
+		)
+		{
+			++top;
+		}
+		int bottom = a_RelPos.y - 1;
+		while (
+			(bottom > 0) &&
+			(a_Chunk.GetBlock({a_RelPos.x, bottom, a_RelPos.z}) == E_BLOCK_SUGARCANE)
+		)
+		{
+			--bottom;
+		}
+
+		// Grow by at most a_NumStages, but no more than max height:
+		auto toGrow = std::min(a_NumStages, a_Chunk.GetWorld()->GetMaxSugarcaneHeight() + 1 - (top - bottom));
+		Vector3i topPos(a_RelPos.x, top, a_RelPos.z);
+		for (int i = 0; i < toGrow; i++)
+		{
+			if (a_Chunk.GetBlock(topPos.addedY(i)) == E_BLOCK_AIR)
+			{
+				a_Chunk.SetBlock(topPos.addedY(i), E_BLOCK_SUGARCANE, 0);
+			}
+			else
+			{
+				return i;
+			}
+		}  // for i
+		return toGrow;
+	}
+
+	virtual PlantAction CanGrow(cChunk & a_Chunk, Vector3i a_RelPos) const override
+	{
+		// Only allow growing if there's an air block above:
+		if (((a_RelPos.y + 1) < cChunkDef::Height) && (a_Chunk.GetBlock(a_RelPos.addedY(1)) == E_BLOCK_AIR))
+		{
+			return Super::CanGrow(a_Chunk, a_RelPos);
+		}
+		return paStay;
+	}
+} ;
+
+
+
+
-- 
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