first commit

README.txt

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+i3_extrabuttons
+
+Dieses Mod erlaubt es beliebig viele "Zusatzbuttons" für das i3-Inventar anzulegen. 
+Andere Mods registrieren ihre Extra Buttons über
+
+    i3_extrabuttons.new_tab("name", {...})
+
+Die Syntax ist identisch zu i3.new_tab, nur dass sie unter "Extras" gelistet werden.
+
+Beispiel:
+
+    if minetest.global_exists("i3_extrabuttons") then
+        i3_extrabuttons.new_tab("pubinv", {
+            description = "Public Inventory",
+            image = "ui_icon_pubinv.png",
+            fields = function(player, data, fields)
+                -- Deins...
+                pubinv.open(player:get_player_name())
+            end,
+        })
+    end

init.lua

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+local S = minetest.get_translator(minetest.get_current_modname())
+
+local extrabuttons = {}
+i3_extrabuttons = {}
+
+-- API-kompatibel: optionale priv/privs
+function i3_extrabuttons.new_tab(name, def)
+    extrabuttons[#extrabuttons+1] = {
+        name = name,
+        def = def,
+    }
+end
+
+local function has_required_priv(player, def)
+    -- Einzelnes Privileg
+    if def.priv then
+        return minetest.check_player_privs(player, { [def.priv] = true })
+    end
+    -- Liste von Privs (alle müssen erfüllt sein)
+    if def.privs then
+        for _, priv in ipairs(def.privs) do
+            if not minetest.check_player_privs(player, { [priv] = true }) then
+                return false
+            end
+        end
+        return true
+    end
+    -- Kein Priv, immer anzeigen
+    return true
+end
+
+local function extras_formspec(player, data, fs)
+    -- Alphabetisch sortiert nach sichtbarer Beschriftung ("description" oder "name")
+    table.sort(extrabuttons, function(a, b)
+        local ad = a.def.description or a.name
+        local bd = b.def.description or b.name
+        return ad:lower() < bd:lower()
+    end)
+
+    local max_per_col = 10
+    local btn_width = 4
+    local btn_height = 0.8
+    local col_space = 7
+    local x_left = 1
+    local x_right = x_left + col_space
+
+    local btn_idx = 0
+    for _, tab in ipairs(extrabuttons) do
+        -- PRÜFUNG auf Rechte für diese Button-Definition:
+        if has_required_priv(player, tab.def) then
+            btn_idx = btn_idx + 1
+            local desc = tab.def.description or tab.name
+            local col = math.floor((btn_idx-1) / max_per_col)
+            local row = (btn_idx-1) % max_per_col
+            local x = (col == 0) and x_left or x_right
+            local y = 1 + row * (btn_height + 0.3)
+            fs(string.format(
+                'image_button[%.1f,%.1f;%.1f,%.1f;i3_extrabuttons_blank.png;extrabtn_%s;%s;;i3_extrabuttons_button_hover.png]',
+                x, y, btn_width, btn_height,
+                tab.name, minetest.formspec_escape(desc)
+            ))
+        end
+    end
+end
+
+local function extras_fields(player, data, fields)
+    for _, tab in ipairs(extrabuttons) do
+        if fields["extrabtn_"..tab.name] and tab.def.fields then
+            return tab.def.fields(player, data, fields)
+        elseif fields["extrabtn_"..tab.name] and tab.def.formspec then
+            i3.set_tab(player, "inventory")
+            tab.def.formspec(player, data, function(...) end)
+            return
+        end
+    end
+end
+
+-- Tabs registrieren (wie gehabt)
+if i3 then
+    i3.new_tab("i3_extrabuttons", {
+        description = S("Extras"),
+        formspec = extras_formspec,
+        fields = extras_fields,
+    })
+end
+
+_G.i3_extrabuttons = i3_extrabuttons

mod.conf

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+name = i3_extrabuttons
+description = Mehr Tab-Buttons für i3, ohne das i3-Limit
+depends = i3
+author= Rage87