Add white room browsing mode

world.lua

@@ -663,6 +663,7 @@ function World:playerJoinCheck(room, previousPositions, newPositions)
 end
 
 function World:movePlayer(room, key)
+	self.roomBrowseMode = false
 	local directions = {
 		up = {x = 0, y = -1, axis = "y"}, down = {x = 0, y = 1, axis = "y"},
 		left = {x = -1, y = 0, axis = "x"}, right = {x = 1, y = 0, axis = "x"},
@@ -714,6 +715,7 @@ function World:movePlayer(room, key)
 end
 
 function World:switchPlayerColor(room, color)
+	self.roomBrowseMode = false
 	local player = room.player[color]
 	if not player then
 		-- A colour copy can be parked in another world room.  Number keys are a
@@ -771,6 +773,19 @@ function World:switchPlayerColor(room, color)
 	return canSwitch
 end
 
+-- Developer room browser. It changes only the displayed room; players,
+-- collision, and runtime save state remain untouched.
+function World:browseRoom(room, key)
+	local exits = {a = "left", d = "right", w = "top", s = "bottom"}
+	local destinationName = exits[key] and self:getNeighbor(room.name, exits[key])
+	local destination = destinationName and self.levels[destinationName]
+	if not destination then return false end
+	currentRoom = destination
+	self.roomBrowseMode = true
+	if setEditorRoomName then setEditorRoomName(destination.name) end
+	return true
+end
+
 function World:tick(room)
 	room:tickLocal()
 	self:rebuildCollision()