Clean up jump exhaustion code a bit

mods/PLAYER/mcl_hunger/init.lua

@@ -267,17 +267,6 @@ minetest.register_globalstep(function(dtime)
 				end
 			end
 
-			local controls = player:get_player_control()
-			-- Determine if the player is moving
-			if controls.up or controls.down or controls.left or controls.right then
-				-- TODO: Add exhaustion for moving in water
-			end
-			-- Jumping
-			-- FIXME: This is quite hacky and doesn't check if the player is actually jumping
-			if controls.jump then
-				mcl_hunger.exhaust(name, mcl_hunger.EXHAUST_JUMP)
-			end
-
 		end
 		end
 	end

mods/PLAYER/playerplus/init.lua

@@ -143,8 +143,11 @@ minetest.register_globalstep(function(dtime)
 			end
 		end
 
-		-- Swimming: Cause exhaustion
+		--[[ Swimming: Cause exhaustion.
-		if minetest.get_item_group(playerplus[name].nod_head, "liquid") ~= 0 or minetest.get_item_group(playerplus[name].nod_feet, "liquid") ~= 0 or minetest.get_item_group(playerplus[name].nod_stand, "liquid") ~= 0 then
+		NOTE: As of 0.4.15, it only counts as swimming when you are with the feet inside the liquid!
+		Head alone does not count. We respect that for now. ]]
+		if minetest.get_item_group(playerplus[name].nod_feet, "liquid") ~= 0 and
+				minetest.get_item_group(playerplus[name].nod_stand, "liquid") ~= 0 then
 			local lastPos = playerplus_internal[name].lastPos
 			if lastPos then
 				local dist = vector.distance(lastPos, pos)
@@ -155,6 +158,20 @@ minetest.register_globalstep(function(dtime)
 					playerplus_internal[name].swimDistance = playerplus_internal[name].swimDistance - superficial
 				end
 			end
+
+		-- Cause buggy exhaustion for jumping
+		elseif not minetest.registered_nodes[playerplus[name].nod_feet].climbable and
+				not minetest.registered_nodes[playerplus[name].nod_stand].climbable then
+			--[[ No exhaustion for “jumping” in a liquid or at a climbable node since those
+			treat the jump key differently. ]]
+
+			-- Cause exhaustion for jumping
+			local controls = player:get_player_control()
+			-- FIXME: This is quite hacky and doesn't check if the player is actually jumping
+			-- FIXME: Sometimes this exhaustion is caused for holding down the jump key on the top of water
+			if controls.jump then
+				mcl_hunger.exhaust(name, mcl_hunger.EXHAUST_JUMP)
+			end
 		end
 
 		-- Underwater: Spawn bubble particles