Add luacheck, update translations, replace ABMs, bug fixes (#1)

* luacheck, mt 5 translation, german translation, maintenance

* fix luacheck warnings

* Fix digital clock nodebox and texture

* Fix luacheck usage

* Add comment why fonts are not split into several lines

2 files changed, 9 insertions, 44 deletions

diff --git a/display_api/deprecation.lua b/display_api/deprecation.lua
index b041f6f..36e1ecd 100644
--- a/display_api/deprecation.lua
+++ b/display_api/deprecation.lua
@@ -19,17 +19,17 @@
 
 -- Deprecation
 
-function deprecated_group(deprecated_group, replacement_group)
+local function deprecated_group(old_group, replacement_group)
 	for name, ndef in pairs(minetest.registered_nodes) do
-		if ndef.groups and ndef.groups[deprecated_group] then
+		if ndef.groups and ndef.groups[old_group] then
 			minetest.log("warning", string.format(
 				'Node %s belongs to deprecated "%s" group which should be replaced with new "%s" group.',
-				name, deprecated_group, replacement_group))
+				name, old_group, replacement_group))
 		end
 	end
 end
 
-function deprecated_global_table(deprecated_global_name, replacement_global_name)
+local function deprecated_global_table(deprecated_global_name, replacement_global_name)
 	assert(type(deprecated_global_name) == 'string', "deprecated_global_name should be a string.")
 	assert(type(replacement_global_name) == 'string', "replacement_global_name should be a string.")
 	assert(deprecated_global_name ~= '', "deprecated_global_name should not be empty.")
diff --git a/display_api/display.lua b/display_api/display.lua
index fa7c854..2baef11 100644
--- a/display_api/display.lua
+++ b/display_api/display.lua
@@ -65,9 +65,7 @@ local function compute_values(r)
 	for _ = 1, r.x do d, w, h = rx(d), rx(w), rx(h) end
 	for _ = 1, r.y do d, w, h = ry(d), ry(w), ry(h) end
 
-	return {
-		rotation=r, depth=d, width=w, height=h,
-		restricted=(r.x==0 and r.z==0) }
+	return {rotation=r, depth=d, width=w, height=h}
 end
 
 for i, r in pairs(facedir_rotations) do
@@ -78,25 +76,6 @@ for i, r in pairs(wallmounted_rotations) do
 	wallmounted_values[i] = compute_values(r)
 end
 
--- Detect rotation restriction
-local rotation_restricted = nil
-minetest.register_entity('display_api:dummy_entity', {
-	collisionbox = { 0, 0, 0, 0, 0, 0 },
-	visual = "upright_sprite",
-	textures = {} })
-
-function display_api.is_rotation_restricted()
-	if rotation_restricted == nil then
-		local objref = minetest.add_entity(
-			{x=0, y=0, z=0}, 'display_api:dummy_entity')
-		if objref then
-			rotation_restricted = objref.set_rotation == nil
-			objref:remove()
-		end
-	end
-	return rotation_restricted
-end
-
 -- Clip position property to maximum entity position
 
 local function clip_pos_prop(posprop)
@@ -243,16 +222,6 @@ function display_api.on_place(itemstack, placer, pointed_thing, override_param2)
 		z = pointed_thing.under.z - pointed_thing.above.z,
 	}
 
-	local rotation_restriction = display_api.is_rotation_restricted()
-
-	if rotation_restriction then
-		-- If item is not placed on a wall, use the player's view direction instead
-		if dir.x == 0 and dir.z == 0 then
-			dir = placer:get_look_dir()
-		end
-		dir.y = 0
-	end
-
 	local param2 = 0
 	if ndef then
 		if ndef.paramtype2 == "wallmounted" or
@@ -261,7 +230,7 @@ function display_api.on_place(itemstack, placer, pointed_thing, override_param2)
 
 		elseif ndef.paramtype2 == "facedir" or
 			ndef.paramtype2 == "colorfacedir"  then
-			param2 = minetest.dir_to_facedir(dir, not rotation_restriction)
+			param2 = minetest.dir_to_facedir(dir, true)
 		end
 	end
 	return minetest.item_place(itemstack, placer, pointed_thing,
@@ -291,13 +260,9 @@ function display_api.on_rotate(pos, node, user, _, new_param2)
 		return
 	end
 
-	if ov.restricted or not display_api.is_rotation_restricted() then
-		minetest.swap_node(pos, node)
-		display_api.update_entities(pos)
-		return true
-	else
-		return false
-	end
+	minetest.swap_node(pos, node)
+	display_api.update_entities(pos)
+	return true
 end
 
 --- Creates display entity with some fields and the on_activate callback