create a ChunkBase class with attrs common to FakeChunk, InfdevChunk, and PocketChunk

infiniteworld.py

@@ -585,11 +585,11 @@ def ZeroChunk(height=512):
     if z is None:
         z = _zeros[height] = _ZeroChunk(height)
     return z
-    
-class _ZeroChunk(object):
+
+from level import ChunkBase
+
+class _ZeroChunk(ChunkBase):
     " a placebo for neighboring-chunk routines "
-    def compress(self): pass
-    def load(self): pass
     def __init__(self, height=512):
         zeroChunk = zeros((16, 16, height), uint8)
         whiteLight = zeroChunk + 15;
@@ -598,7 +598,8 @@ class _ZeroChunk(object):
         self.SkyLight = whiteLight
         self.Data = zeroChunk
 
-class InfdevChunk(EntityLevel):
+
+class InfdevChunk(ChunkBase):
     """ This is a 16x16xH chunk in an (infinite) world.
     The properties Blocks, Data, SkyLight, BlockLight, and Heightmap 
     are ndarrays containing the respective blocks in the chunk file.

java.py

@@ -5,6 +5,7 @@ Created on Jul 22, 2011
 '''
 __all__ = ["MCJavaLevel"]
 from mclevelbase import *
+from level import MCLevel
 
 import re
 

level.py

@@ -772,13 +772,14 @@ class EntityLevel(MCLevel):
 
         return self._fakeEntities[cx, cz]
 
-class FakeChunk(EntityLevel):
+class ChunkBase(EntityLevel):
     def load(self):pass
     def compress(self):pass
-    def __init__(self):pass
     def chunkChanged(self):pass
     @property
     def materials(self): return self.world.materials
+
+class FakeChunk(ChunkBase):
     @property
     def HeightMap(self):
         if hasattr(self, "_heightMap"):

pocket.py

@@ -297,7 +297,7 @@ class PocketChunksFile(object):
         coords = ((i % 32, i // 32) for i in indexes)
         return coords
         
-from infiniteworld import InfdevChunk, ChunkedLevelMixin
+from infiniteworld import ChunkBase, ChunkedLevelMixin
 from level import MCLevel
 
 class PocketWorld(ChunkedLevelMixin, MCLevel):
@@ -350,7 +350,7 @@ class PocketWorld(ChunkedLevelMixin, MCLevel):
         if cx>31 or cz>31 or cx < 0 or cz < 0: return False
         return self.chunkFile.getOffset(cx,cz) != 0
         
-class PocketChunk(InfdevChunk):
+class PocketChunk(ChunkBase):
     Blocks = Data = SkyLight = BlockLight = None
     
     HeightMap = FakeChunk.HeightMap