Implement invtab ordering

mods/rp_formspec/API.md

@@ -140,6 +140,24 @@ In that case, it can only be reached by a function call.
 
 
 
+### `rp_formspec.set_invtab_order(order)`
+
+Overrides the order in which the invtabs are shown, starting
+with the top tab.
+
+* `order`: List of invtab IDs to order.
+
+`order` can contain unknown invtab IDs, they will be ignored.
+Any invtab not listed in `order` will be added at the end
+in a non-predictable order.
+
+If this function is called multiple times, the last
+time this function is called is the one that actually
+takes effect. If you want to override the order set
+by another mod, depend on this mod first.
+
+
+
 ### `rp_formspec.registered_invpages`
 
 Table which lists all registered invpages.

mods/rp_formspec/init.lua

@@ -291,13 +291,27 @@ local function get_invtabs()
    for o=1, #registered_invtabs_order do
       local tabname = registered_invtabs_order[o]
       local def = rp_formspec.registered_invtabs[tabname]
-      form = form .. rp_formspec.tab(tabx, taby, "_rp_formspec_tab_"..tabname, def.icon, def.tooltip)
-      taby = taby + tabplus
+      if def then
+         form = form .. rp_formspec.tab(tabx, taby, "_rp_formspec_tab_"..tabname, def.icon, def.tooltip)
+         taby = taby + tabplus
+      end
    end
    invtabs_cached = form
    return form
 end
 
+function rp_formspec.set_invtab_order(order)
+  registered_invtabs_order = table.copy(order)
+  local already_ordered = {}
+  for o=1, #order do
+    already_ordered[order[o]] = true
+  end
+  for k,v in pairs(rp_formspec.registered_invtabs) do
+    if not already_ordered[k] then
+       table.insert(registered_invtabs_order, k)
+    end
+  end
+end
 
 -- Pages
 

mods/rp_formspec_config/init.lua

@@ -0,0 +1,11 @@
+-- Set the order of inventory menu tabs
+rp_formspec.set_invtab_order({
+	"rp_crafting:crafting", 
+	"rp_armor:armor",
+	"rp_achievements:achievements",
+	"rp_player_skins:player_skins",
+	"rp_creative:creative",
+})
+
+-- Note: If you want to override this order, depend
+-- on this mod and call this function again.

mods/rp_formspec_config/mod.conf

@@ -0,0 +1,3 @@
+name = rp_formspec_config
+description = Some configuration tweaks for rp_formspec
+depends = rp_formspec, rp_crafting, rp_creative, rp_player_skins, rp_armor, rp_achievements