4 files changed, 20 insertions, 14 deletions
diff --git a/src/BlockArea.cpp b/src/BlockArea.cpp
index 910661f60..c33d2712b 100644
--- a/src/BlockArea.cpp
+++ b/src/BlockArea.cpp
@@ -6,7 +6,6 @@
 
 #include "Globals.h"
 #include "BlockArea.h"
-#include "World.h"
 #include "OSSupport/GZipFile.h"
 #include "WorldStorage/FastNBT.h"
 #include "Blocks/BlockHandler.h"
@@ -266,7 +265,7 @@ void cBlockArea::SetOrigin(int a_OriginX, int a_OriginY, int a_OriginZ)
 
 
 
-bool cBlockArea::Read(cWorld * a_World, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes)
+bool cBlockArea::Read(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes)
 {
 	// Normalize the coords:
 	if (a_MinBlockX > a_MaxBlockX)
@@ -327,7 +326,7 @@ bool cBlockArea::Read(cWorld * a_World, int a_MinBlockX, int a_MaxBlockX, int a_
 	cChunkDef::AbsoluteToRelative(a_MaxBlockX, a_MaxBlockY, a_MaxBlockZ, MaxChunkX, MaxChunkZ);
 	
 	// Query block data:
-	if (!a_World->ForEachChunkInRect(MinChunkX, MaxChunkX, MinChunkZ, MaxChunkZ, Reader))
+	if (!a_ForEachChunkProvider->ForEachChunkInRect(MinChunkX, MaxChunkX, MinChunkZ, MaxChunkZ, Reader))
 	{
 		Clear();
 		return false;
@@ -340,7 +339,7 @@ bool cBlockArea::Read(cWorld * a_World, int a_MinBlockX, int a_MaxBlockX, int a_
 
 
 
-bool cBlockArea::Write(cWorld * a_World, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes)
+bool cBlockArea::Write(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes)
 {
 	ASSERT((a_DataTypes & GetDataTypes()) == a_DataTypes);  // Are you requesting only the data that I have?
 	a_DataTypes = a_DataTypes & GetDataTypes();  // For release builds, silently cut off the datatypes that I don't have
@@ -357,7 +356,7 @@ bool cBlockArea::Write(cWorld * a_World, int a_MinBlockX, int a_MinBlockY, int a
 		a_MinBlockY = cChunkDef::Height - m_SizeY;
 	}
 
-	return a_World->WriteBlockArea(*this, a_MinBlockX, a_MinBlockY, a_MinBlockZ, a_DataTypes);
+	return a_ForEachChunkProvider->WriteBlockArea(*this, a_MinBlockX, a_MinBlockY, a_MinBlockZ, a_DataTypes);
 }
 
 
diff --git a/src/BlockArea.h b/src/BlockArea.h
index 075cc99ec..ae23c76c6 100644
--- a/src/BlockArea.h
+++ b/src/BlockArea.h
@@ -12,13 +12,10 @@
 
 #pragma once
 
+#include "ForEachChunkProvider.h"
 
 
 
-
-// fwd: World.h
-class cWorld;
-
 // fwd: FastNBT.h
 class cParsedNBT;
 
@@ -68,13 +65,13 @@ public:
 	void SetOrigin(int a_OriginX, int a_OriginY, int a_OriginZ);
 	
 	/// Reads an area of blocks specified. Returns true if successful. All coords are inclusive.
-	bool Read(cWorld * a_World, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes = baTypes | baMetas);
+	bool Read(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ, int a_DataTypes = baTypes | baMetas);
 	
 	// TODO: Write() is not too good an interface: if it fails, there's no way to repeat only for the parts that didn't write
 	// A better way may be to return a list of cBlockAreas for each part that didn't succeed writing, so that the caller may try again
 	
 	/// Writes the area back into cWorld at the coords specified. Returns true if successful in all chunks, false if only partially / not at all
-	bool Write(cWorld * a_World, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes = baTypes | baMetas);
+	bool Write(cForEachChunkProvider * a_ForEachChunkProvider, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes = baTypes | baMetas);
 	
 	/// Copies this object's contents into the specified BlockArea.
 	void CopyTo(cBlockArea & a_Into) const;
diff --git a/src/ForEachChunkProvider.h b/src/ForEachChunkProvider.h
new file mode 100644
index 000000000..9092fcb0a
--- /dev/null
+++ b/src/ForEachChunkProvider.h
@@ -0,0 +1,10 @@
+
+class cBlockArea;
+
+class cForEachChunkProvider
+{
+public:
+	virtual bool ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ, cChunkDataCallback & a_Callback) = 0;
+	
+	virtual bool WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes) = 0;
+};
diff --git a/src/World.h b/src/World.h
index ef74a65c7..f5134c223 100644
--- a/src/World.h
+++ b/src/World.h
@@ -59,7 +59,7 @@ typedef cItemCallback<cNoteEntity>      cNoteBlockCallback;
 
 
 // tolua_begin
-class cWorld
+class cWorld : public cForEachChunkProvider
 {
 public:
 
@@ -315,7 +315,7 @@ public:
 	bool IsChunkLighted(int a_ChunkX, int a_ChunkZ);
 	
 	/// Calls the callback for each chunk in the coords specified (all cords are inclusive). Returns true if all chunks have been processed successfully
-	bool ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ, cChunkDataCallback & a_Callback);
+	virtual bool ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ, cChunkDataCallback & a_Callback);
 
 	// tolua_begin
 	
@@ -361,7 +361,7 @@ public:
 	Prefer cBlockArea::Write() instead, this is the internal implementation; cBlockArea does error checking, too.
 	a_DataTypes is a bitmask of cBlockArea::baXXX constants ORed together.
 	*/
-	bool WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes);
+	virtual bool WriteBlockArea(cBlockArea & a_Area, int a_MinBlockX, int a_MinBlockY, int a_MinBlockZ, int a_DataTypes);
 	
 	// tolua_begin