Intra-chapter refactoring

components/ai.py

@@ -6,14 +6,12 @@ import numpy as np  # type: ignore
 import tcod
 
 from actions import Action, MeleeAction, MovementAction, WaitAction
-from components.base_component import BaseComponent
 
 if TYPE_CHECKING:
     from entity import Actor
 
 
-class BaseAI(Action, BaseComponent):
-    entity: Actor
+class BaseAI(Action):
 
     def get_path_to(self, dest_x: int, dest_y: int) -> List[Tuple[int, int]]:
         """Compute and return a path to the target position.

components/base_component.py

@@ -5,11 +5,16 @@ from typing import TYPE_CHECKING
 if TYPE_CHECKING:
     from engine import Engine
     from entity import Entity
+    from game_map import GameMap
 
 
 class BaseComponent:
-    entity: Entity  # Owning entity instance
+    parent: Entity  # Owning entity instance
+
+    @property
+    def gamemap(self) -> GameMap:
+        return self.parent.gamemap
 
     @property
     def engine(self) -> Engine:
-        return self.entity.gamemap.engine
+        return self.gamemap.engine

components/fighter.py

@@ -12,7 +12,7 @@ if TYPE_CHECKING:
 
 
 class Fighter(BaseComponent):
-    entity: Actor
+    parent: Actor
 
     def __init__(self, hp: int, defense: int, power: int):
         self.max_hp = hp
@@ -27,23 +27,23 @@ class Fighter(BaseComponent):
     @hp.setter
     def hp(self, value: int) -> None:
         self._hp = max(0, min(value, self.max_hp))
-        if self._hp == 0 and self.entity.ai:
+        if self._hp == 0 and self.parent.ai:
             self.die()
 
     def die(self) -> None:
-        if self.engine.player is self.entity:
+        if self.engine.player is self.parent:
             death_message = "You died!"
             death_message_color = color.player_die
             self.engine.event_handler = GameOverEventHandler(self.engine)
         else:
-            death_message = f"{self.entity.name} is dead!"
+            death_message = f"{self.parent.name} is dead!"
             death_message_color = color.enemy_die
 
-        self.entity.char = "%"
-        self.entity.color = (191, 0, 0)
-        self.entity.blocks_movement = False
-        self.entity.ai = None
-        self.entity.name = f"remains of {self.entity.name}"
-        self.entity.render_order = RenderOrder.CORPSE
+        self.parent.char = "%"
+        self.parent.color = (191, 0, 0)
+        self.parent.blocks_movement = False
+        self.parent.ai = None
+        self.parent.name = f"remains of {self.parent.name}"
+        self.parent.render_order = RenderOrder.CORPSE
 
         self.engine.message_log.add_message(death_message, death_message_color)

entity.py

@@ -18,11 +18,11 @@ class Entity:
     A generic object to represent players, enemies, items, etc.
     """
 
-    gamemap: GameMap
+    parent: GameMap
 
     def __init__(
             self,
-            gamemap: Optional[GameMap] = None,
+            parent: Optional[GameMap] = None,
             x: int = 0,
             y: int = 0,
             char: str = "?",
@@ -38,17 +38,21 @@ class Entity:
         self.name = name
         self.blocks_movement = blocks_movement
         self.render_order = render_order
-        if gamemap:
+        if parent:
             # If gamemap isn't provided now, it will be later.
-            self.gamemap = gamemap
-            gamemap.entities.add(self)
+            self.parent = parent
+            parent.entities.add(self)
+
+    @property
+    def gamemap(self) -> GameMap:
+        return self.parent.gamemap
 
     def spawn(self: T, gamemap: GameMap, x: int, y: int) -> T:
         """Spawn a copy of this instance at the given location."""
         clone = copy.deepcopy(self)
         clone.x = x
         clone.y = y
-        clone.gamemap = gamemap
+        clone.parent = gamemap
         gamemap.entities.add(clone)
         return clone
 
@@ -57,10 +61,11 @@ class Entity:
         self.x = x
         self.y = y
         if gamemap:
-            if hasattr(self, "gamemap"):  # Possibly uninitialized
-                self.gamemap.entities.remove(self)
+            if hasattr(self, "parent"):  # Possibly uninitialized
+                if self.parent is self.gamemap:
+                    self.gamemap.entities.remove(self)
 
-            self.gamemap = gamemap
+            self.parent = gamemap
             gamemap.entities.add(self)
 
     def move(self, dx: int, dy: int):
@@ -94,7 +99,7 @@ class Actor(Entity):
         self.ai: Optional[BaseAI] = ai_cls(self)
 
         self.fighter = fighter
-        self.fighter.entity = self
+        self.fighter.parent = self
 
     @property
     def is_alive(self) -> bool:

game_map.py

@@ -37,6 +37,10 @@ class GameMap:
             order="F"
         )  # Tiles the player has seen before
 
+    @property
+    def gamemap(self) -> GameMap:
+        return self
+
     @property
     def actors(self) -> Iterator[Actor]:
         """Iterate over this map's living actors."""

message_log.py

@@ -1,4 +1,4 @@
-from typing import List, Reversible, Tuple
+from typing import Iterable, List, Reversible, Tuple
 import textwrap
 
 import tcod
@@ -57,7 +57,18 @@ class MessageLog:
         self.render_messages(console, x, y, width, height, self.messages)
 
     @staticmethod
+    def wrap(string: str, width: int) -> Iterable[str]:
+        """Return a wrapped text message."""
+        for line in string.splitlines():  # Handle newlines in messages.
+            yield from textwrap.wrap(
+                line,
+                width,
+                expand_tabs=True
+            )
+
+    @classmethod
     def render_messages(
+            cls,
             console: tcod.Console,
             x: int,
             y: int,
@@ -72,7 +83,7 @@ class MessageLog:
         y_offset = height - 1
 
         for message in reversed(messages):
-            for line in reversed(textwrap.wrap(message.full_text, width)):
+            for line in reversed(list(cls.wrap(message.full_text, width))):
                 console.print(x=x, y=y + y_offset, string=line, fg=message.fg)
                 y_offset -= 1
                 if y_offset < 0: