diff options
Diffstat (limited to 'register.lua')
| -rw-r--r-- | register.lua | 99 |
1 files changed, 86 insertions, 13 deletions
diff --git a/register.lua b/register.lua index cf9c923..82a7834 100644 --- a/register.lua +++ b/register.lua @@ -134,6 +134,74 @@ unified_inventory.register_page("craft", { end, }) +-- group_representative_item(): select representative item for a group +-- +-- This is used when displaying craft recipes, where an ingredient is +-- specified by group rather than as a specific item. A single-item group +-- is represented by that item, with the single-item status signalled +-- so that stack_image_button() can treat it as just the item. If the +-- group contains no items at all, it will be treated as containing a +-- single unknown item. +-- +-- Within a multiple-item group, we prefer to use an item that has the +-- same specific name as the group, and if there are more than one of +-- those items we prefer the one specified by the default mod if there +-- is one. If this produces a bad result, the mod defining a group can +-- register its preference for which item should represent the group, +-- and we'll use that instead if possible. Also, for a handful of groups +-- (predating this registration system) we have built-in preferences +-- that are used like registered preferences. Among equally-preferred +-- items, we just pick the one with the lexicographically earliest name, +-- for determinism. +local builtin_group_representative_items = { + mesecon_conductor_craftable = "mesecons:wire_00000000_off", + stone = "default:cobble", + wool = "wool:white", +} +local function compute_group_representative_item(groupspec) + local groupname = string.sub(groupspec, 7) + local candidate_items = {} + for itemname, itemdef in pairs(minetest.registered_items) do + if itemdef.groups[groupname] and itemdef.groups[groupname] ~= 0 then + table.insert(candidate_items, itemname) + end + end + print("group spec "..groupspec.." has "..#candidate_items.." candidates") + for _, i in ipairs(candidate_items) do + print(" ", i) + end + if #candidate_items == 0 then return { item = "unobtainium!", sole = true } end + if #candidate_items == 1 then return { item = candidate_items[1], sole = true } end + local bestitem = "" + local bestpref = 0 + for _, item in ipairs(candidate_items) do + local pref + if item == unified_inventory.registered_group_representative_items[groupname] then + pref = 5 + elseif item == builtin_group_representative_items[groupname] then + pref = 4 + elseif item == "default:"..groupname then + pref = 3 + elseif item:gsub("^[^:]*:", "") == groupname then + pref = 2 + else + pref = 1 + end + if pref > bestpref or (pref == bestpref and item < bestitem) then + bestitem = item + bestpref = pref + end + end + return { item = bestitem, sole = false } +end +local group_representative_item_cache = {} +local function group_representative_item(groupspec) + if not group_representative_item_cache[groupspec] then + group_representative_item_cache[groupspec] = compute_group_representative_item(groupspec) + end + return group_representative_item_cache[groupspec] +end + -- stack_image_button(): generate a form button displaying a stack of items -- -- Normally a simple item_image_button[] is used. If the stack contains @@ -147,24 +215,29 @@ unified_inventory.register_page("craft", { -- replaced as soon as the engine adds support for a proper item count, -- or at least label placement control, on buttons. -- --- The specified item may be a group. In that case, an image_button[] --- is used, displaying an image that just indicates grouping, with a --- label giving the name of the specific group. It very often happens --- that the group name doesn't fit within the confines of the button and --- gets cropped. Group names are also not brilliantly readable against --- the background of the group image. +-- The specified item may be a group. In that case, the group will be +-- represented by some item in the group, along with a flag indicating +-- that it's a group. If the group contains only one item, it will be +-- treated as if that item had been specified directly. local function stack_image_button(x, y, w, h, buttonname_prefix, stackstring) local st = ItemStack(stackstring) - local n = st:get_name() + local specitem = st:get_name() local c = st:get_count() - local clab = c == 1 and "" or string.format("%9d", c) - local buttonname = buttonname_prefix..n - local xywh = x..","..y..";"..w..","..h - if string.sub(n, 1, 6) == "group:" then - return "image_button["..xywh..";".."ui_group.png;"..minetest.formspec_escape(buttonname)..";"..minetest.formspec_escape(string.sub(n, 7)).."\n\n"..clab.."]" + local clab = c == 1 and " " or string.format("%7d", c) + local gflag, displayitem, selectitem + if string.sub(specitem, 1, 6) == "group:" then + local gri = group_representative_item(specitem) + gflag = not gri.sole + displayitem = gri.item + selectitem = gri.sole and gri.item or specitem else - return "item_image_button["..xywh..";"..minetest.formspec_escape(n)..";"..minetest.formspec_escape(buttonname_prefix..n)..";\n\n"..clab.."]" + gflag = false + displayitem = specitem + selectitem = specitem end + local label = string.format("\n\n%s%7d", gflag and "G" or " ", c):gsub(" 1$", " .") + if label == "\n\n ." then label = "" end + return "item_image_button["..x..","..y..";"..w..","..h..";"..minetest.formspec_escape(displayitem)..";"..minetest.formspec_escape(buttonname_prefix..selectitem)..";"..label.."]" end unified_inventory.register_page("craftguide", { |