minetest-mods/smart_inventory-cd2025
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filter: use metatables for filter definition interface

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This commit is contained in:
Alexander Weber 2017-04-15 16:18:55 +02:00
parent 586dbf52dd
commit 4b062deb08
1 changed files with 37 additions and 30 deletions
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67
libs/filter.lua
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@ -1,6 +1,40 @@
local txt = smart_inventory.txt
local txt_usage = minetest.setting_get("smart_inventory_friendly_group_names") or false
--------------------------------------------------------------
-- Filter class
--------------------------------------------------------------
local filter_class = {}
filter_class.__index = filter_class
function filter_class:check_item_by_name(itemname)
if minetest.registered_items[itemname] then
return self.filter_func(minetest.registered_items[itemname])
end
end
function filter_class:check_item_by_def(def)
return self.filter_func(def)
end
function filter_class:get_description(group)
local ret_desc
if self.shortdesc_func then
ret_desc = self:shortdesc_func(group)
elseif txt[group.name] then
ret_desc = txt[group.name].label
elseif group.parent and group.parent.childs[group.name] and txt[group.parent.name] then
ret_desc = txt[group.parent.name].label.." "..group.parent.childs[group.name]
else
ret_desc = group.name
end
if not txt_usage or ret_desc == false then
return ret_desc
else
return group.name
end
end
local filter = {}
filter.registered_filter = {}
@ -12,36 +46,9 @@ function filter.register_filter(def)
assert(def.name, "filter needs a name")
assert(def.filter_func, "filter function required")
assert(not filter.registered_filter[def.name], "filter already exists")
local self = def
function self:check_item_by_name(itemname)
if minetest.registered_items[itemname] then
return self.filteget_group_descriptionr_func(minetest.registered_items[itemname])
end
end
function self:check_item_by_def(def)
return self.filter_func(def)
end
function self:get_description(group)
local ret_desc
if self.shortdesc_func then
ret_desc = self:shortdesc_func(group)
elseif txt[group.name] then
ret_desc = txt[group.name].label
elseif group.parent and group.parent.childs[group.name] and txt[group.parent.name] then
ret_desc = txt[group.parent.name].label.." "..group.parent.childs[group.name]
else
ret_desc = group.name
end
if not txt_usage or ret_desc == false then
return ret_desc
else
return group.name
end
end
filter.registered_filter[self.name] = self
setmetatable(def, filter_class)
def.__index = filter_class
filter.registered_filter[def.name] = def
end
filter.register_filter({