Tweak main inventory display, have not solved space leak

src/Dodge/DisplayInventory.hs

@@ -1,6 +1,7 @@
 -- {-# OPTIONS_GHC -fno-full-laziness #-}
 --{-# LANGUAGE TupleSections #-}
 {-# LANGUAGE LambdaCase #-}
+--{-# LANGUAGE BangPatterns #-}
 
 module Dodge.DisplayInventory (
     updateInventoryPositioning,
@@ -8,6 +9,7 @@ module Dodge.DisplayInventory (
     toggleCombineInv,
 ) where
 
+--import StrictHelp
 import qualified Data.Strict.Tuple as STup
 import Control.Applicative
 import Control.Lens
@@ -272,6 +274,7 @@ updateSectionsPositioning f h mselpos allavailablelines lsss sss =
     IM.intersectionWithKey (\k -> updateSection (h k) (m k)) ls ssizes `g` offsets
   where
     offsets = fmap _ssOffset sss
+    --offsets = mempty
     m k = do
         (k', i, _) <- mselpos
         guard $ k == k'
@@ -296,23 +299,26 @@ updateSection indent mcsel sis availablelines oldoffset =
         , _ssShownItems =
             tweakfirst . tweaklast . map (^. _2) $
                 take availablelines shownstrings
+        , _ssShownLength = length shownitems
         , _ssIndent = indent
         }
   where
-    oldoffsetbounded = max 0 . min oldoffset $ length allstrings - availablelines
+    shownitems = 
+            tweakfirst . tweaklast . map (^. _2) $
+                take availablelines shownstrings
+    oldoffsetbounded = max 0 . min oldoffset $ aslength - availablelines
     offset = fromMaybe oldoffsetbounded $ do
         csel <- mcsel
         maxcsel <- fst <$> IM.lookupMax sis
         xselsize <- fmap length $ sis ^? ix csel . siPictures
         return $ case sum $ fmap (length . _siPictures) . fst . IM.split csel $ sis of
-            pos | pos == 0 || length allstrings <= availablelines -> 0
+            pos | pos == 0 || aslength <= availablelines -> 0
             pos | pos - 1 < oldoffset -> pos - 1
             pos | maxcsel == csel -> pos - availablelines + xselsize
             pos | pos + 1 + xselsize - availablelines > oldoffset ->
                     pos - availablelines + 1 + xselsize
---            _   | length allstrings - oldoffset < availablelines ->
-            _   | length allstrings - availablelines < oldoffset ->
-                    length allstrings - availablelines
+            _   | aslength - availablelines < oldoffset ->
+                    aslength - availablelines
             _ -> oldoffsetbounded
     tweakfirst
         | offset > 0 = ix 0 .~ color moreupcolor (text (replicate 15 (toEnum 30)))
@@ -324,12 +330,11 @@ updateSection indent mcsel sis availablelines oldoffset =
                 .~ color moredowncolor (text . replicate 15 $ toEnum 31)
         | otherwise = id
     moredowncolor = fromMaybe white $ allstrings ^? ix (offset + availablelines - 1) . _1
-    allstrings = foldMap listSelectionColorPicture sis
+    (allstrings,Sum aslength) = foldMap listSelectionColorPicture sis
     shownstrings = drop offset allstrings
 
-listSelectionColorPicture :: SelectionItem a -> [STup.Pair Color Picture]
---listSelectionColorPicture si = []
-listSelectionColorPicture si = g <$> _siPictures si
+listSelectionColorPicture :: SelectionItem a -> ([STup.Pair Color Picture], Sum Int)
+listSelectionColorPicture si = (g <$> _siPictures si, Sum $ _siHeight si)
   where
     g str = 
         _siColor si STup.:!: 
@@ -370,6 +375,7 @@ enterCombineInv cfig w =
             { _ssItems = mempty
             , _ssOffset = 0
             , _ssShownItems = mempty
+            , _ssShownLength = 0
             , _ssIndent = 0
             }
     combsection =