Implement parts of clientchunkpool and fix softlock in the process

chunks.py

@@ -1,6 +1,6 @@
 import threading
 import time
-from utils import CHUNK_WIDTH, CHUNK_HEIGHT
+from utils import CHUNK_WIDTH, CHUNK_HEIGHT, Position
 
 class ChunkDiff():
 	"""
@@ -134,14 +134,28 @@ class ChunkPool():
 	def __exit__(self, type, value, tb):
 		self._lock.release()
 	
+	def set(self, pos, chunk):
+		self._chunks[pos] = chunk
+	
 	def get(self, pos):
 		return self._chunks.get(pos)
 	
 	def create(self, pos):
 		chunk = Chunk()
-		self._chunks[pos] = chunk
+		self.set(pos, chunk)
 		return chunk
 	
+	def apply_changes(self, changes):
+		for change in changes:
+			pos = Position(change[0][0], change[0][1])
+			diff = change[1]
+			
+			chunk = self.get(pos)
+			if not chunk:
+				chunk = self.create(pos)
+			
+			chunk.commit_diff(diff)
+	
 	def commit_changes(self):
 		changes = []
 		
@@ -174,6 +188,8 @@ class ChunkPool():
 		# old list comprehension which became too long:
 		#coords = [pos for pos, chunk in self._chunks.items() if not pos in except_for and condition(chunk)]
 		
+		self.save_changes()
+		
 		coords = []
 		
 		for pos, chunk in self._chunks.items():

client.py

@@ -1,20 +1,20 @@
 import curses
+import os
 import string
 import sys
 import threading
 from maps import Map, ChunkMap
+from chunks import ChunkDiff
 from clientchunkpool import ClientChunkPool
 
-# import fron chunks, maps, clientchunkpool
-
 class Client():
 	def __init__(self, address):
 		self.stopping = False
 		self.chunkmap_active = False
 		
 		self.address = address
-		self.drawevent = threading.Event()
-		self.pool = ClientChunkPool()
+		self._drawevent = threading.Event()
+		self.pool = ClientChunkPool(self)
 		#self.map_ = Map(sizex, sizey, self.pool)
 		#self.chunkmap = Chunkmap(sizex, sizey, self.pool) # size changeable by +/-?
 		
@@ -22,7 +22,7 @@ class Client():
 	
 	def launch(self, stdscr):
 		sizey, sizex = stdscr.getmaxyx()
-		self.map_ = Map(sizex, sizey, self.pool, self.drawevent)
+		self.map_ = Map(sizex, sizey, self.pool, self)
 		self.chunkmap = ChunkMap(self.map_)
 		
 		# start input thread
@@ -35,7 +35,8 @@ class Client():
 		self.inputthread.start()
 		
 		while not self.stopping:
-			self.drawevent.wait()
+			self._drawevent.wait()
+			self._drawevent.clear()
 			stdscr.noutrefresh()
 			with self.map_ as m:
 				m.draw()
@@ -50,7 +51,9 @@ class Client():
 			#m.noutrefresh()
 			
 			curses.doupdate()
-			self.drawevent.clear()
+	
+	def redraw(self):
+		self._drawevent.set()
 	
 	def input_thread(self, scr):
 		while True:
@@ -59,7 +62,7 @@ class Client():
 			if   i == "\x1b": self.stop()
 			elif i == "KEY_F(2)":
 				self.chunkmap_active = not self.chunkmap_active
-				self.drawevent.set()
+				self.redraw()
 			elif i == "KEY_F(5)": self.map_.redraw()
 			# scrolling the map (10 vertical, 20 horizontal)
 			elif i == "kUP5":  self.map_.scroll(0, -10)
@@ -86,11 +89,23 @@ class Client():
 			elif i == "\x7f": self.map_.delete()
 			elif i == "\n":   self.map_.newline()
 			
-			else: sys.stdout.write(repr(i) + "\n")
+			else: sys.stderr.write(repr(i) + "\n")
 	
 	def stop(self):
 		self.stopping = True
-		self.drawevent.set()
+		self.redraw()
+	
+	def request_chunks(self, coords):
+		def execute():
+			changes = [(pos, ChunkDiff()) for pos in coords]
+			with self.pool as pool:
+				pool.apply_changes(changes)
+		
+		tx = threading.Timer(1, execute)
+		tx.start()
+	
+	def send_changes(self, changes):
+		pass
 
 def main(argv):
 	if len(argv) != 2:
@@ -98,6 +113,8 @@ def main(argv):
 		print("  {} address".format(argv[0]))
 		return
 	
+	os.environ.setdefault('ESCDELAY', '25') # only a 25 millisecond delay
+	
 	client = Client(argv[1])
 	curses.wrapper(client.launch)
 

clientchunkpool.py

@@ -5,8 +5,31 @@ class ClientChunkPool(ChunkPool):
 	A ChunkPool that requests/loads chunks from a client.
 	"""
 	
-	def __init__(self):
+	def __init__(self, client):
 		super().__init__()
-		self.max_age = 10 #s
 		
-	pass
+		self._client = client
+	
+	#def commit_changes(self):
+		#changes = []
+		
+		#for pos, chunk in self._chunks.items():
+			#changes.append((pos, chunk.get_changes()))
+			#chunk.commit_changes()
+		
+		#return changes
+	
+	def apply_changes(self, changes):
+		super().apply_changes(changes)
+		
+		self._client.redraw()
+	
+	def save_changes(self):
+		changes = self.commit_changes()
+		self._client.send_changes(changes)
+	
+	def load(self, pos):
+		raise Exception
+	
+	def load_list(self, coords):
+		self._client.request_chunks(coords)

maps.py

@@ -4,15 +4,13 @@ import math
 import threading
 from utils import CHUNK_HEIGHT, CHUNK_WIDTH, chunkx, chunky, inchunkx, inchunky, Position
 
-import sys
-
 class Map():
 	"""
 	A map which displays chunks and a cursor on the screen.
 	Allows for user to modify chunks in an intuitive way.
 	"""
 	
-	def __init__(self, width, height, chunkpool, drawevent):
+	def __init__(self, width, height, chunkpool, client):
 		self._lock = threading.RLock()
 		
 		self.chunkpreload = 0 # preload chunks in this radius (they will count as "visible")
@@ -26,7 +24,7 @@ class Map():
 		self.lastcury = self.cursory
 		
 		self.chunkpool = chunkpool
-		self.drawevent = drawevent
+		self.client = client
 		
 		self._pad = curses.newpad(5, 5)
 		self.resize(width, height)
@@ -44,7 +42,7 @@ class Map():
 	def redraw(self):
 		self._pad.redrawwin()
 		
-		self.drawevent.set()
+		self.client.redraw()
 	
 	def draw(self):
 		with self.chunkpool as pool:
@@ -93,7 +91,7 @@ class Map():
 			pool.load_list(coords)
 			pool.clean_up(except_for=coords, condition=self._unload_condition)
 		
-		self.drawevent.set()
+		self.client.redraw()
 	
 	def resize(self, width, height):
 		self.width = width
@@ -208,7 +206,7 @@ class ChunkMap():
 	styles = {
 		"empty": ChunkStyle("()", 2),
 		"normal": ChunkStyle("[]", 3),
-		"old": ChunkStyle("{}", 4),
+		"unload": ChunkStyle("{}", 4),
 		"visible": ChunkStyle("##", 5),
 		"modified": ChunkStyle("!!", 6),
 	}
@@ -225,7 +223,7 @@ class ChunkMap():
 		if curses.has_colors():
 			curses.init_pair(2, curses.COLOR_BLACK, curses.COLOR_BLUE) # empty chunk
 			curses.init_pair(3, curses.COLOR_BLACK, curses.COLOR_WHITE) # chunk
-			curses.init_pair(4, curses.COLOR_BLACK, curses.COLOR_YELLOW) # old chunk
+			curses.init_pair(4, curses.COLOR_BLACK, curses.COLOR_YELLOW) # chunk to be unloaded
 			curses.init_pair(5, curses.COLOR_BLACK, curses.COLOR_GREEN) # visible chunk
 			curses.init_pair(6, curses.COLOR_BLACK, curses.COLOR_RED) # modified chunk
 	
@@ -236,7 +234,10 @@ class ChunkMap():
 	
 	def draw(self):
 		with self.chunkpool as pool:
+			if pool._chunks:
 				minx, maxx, miny, maxy = self.get_min_max(pool)
+			else:
+				minx, maxx, miny, maxy = 0, 0, 0, 0
 			sizex = maxx - minx
 			sizey = maxy - miny
 			self.update_size(sizex, sizey)
@@ -281,8 +282,8 @@ class ChunkMap():
 		if pos in self.map_.visible_chunk_coords():
 			return "visible"
 		
-		if chunk.age() > self.chunkpool.max_age:
-			return "old"
+		if self.map_._unload_condition(pos, chunk):
+			return "unload"
 		
 		if chunk.empty():
 			return "empty"

utils.py

@@ -2,8 +2,10 @@ from collections import namedtuple
 
 Position = namedtuple("Position", "x y")
 
-CHUNK_WIDTH = 64
-CHUNK_HEIGHT = 32
+#CHUNK_WIDTH = 64
+#CHUNK_HEIGHT = 32
+CHUNK_WIDTH = 32
+CHUNK_HEIGHT = 16
 
 def chunkx(value):
 	return value//CHUNK_WIDTH