player movements

entities/player.py

@@ -178,6 +178,28 @@ class BrSimPlayer():
       return False
     self.inventory.append(item)
 
+  def _move(self, delta_x, delta_y):
+    # XXX maps limits:
+    # probably this isn't player's business
+    # game orchestror should manage it
+    # to avoid that the player can go out from the map
+    # or can reach unaccessible points
+    # also because the player doens't know the Map (entities/gamemap.py)
+    self.coord_x += x
+    self.coord_y += y
+
+  def move_right(self):
+    self._move(1, 0)
+
+  def move_left(self):
+    self._move(-1, 0)
+
+  def move_top(self):
+    self._move(0, 1)
+
+  def move_bottom(self):
+    self._move(0, -1)
+
   def escape(self):
     # TODO It can run away from the fighting
     return