Revert "Docx reader and writer: support row heads."

This reverts commit cbe67b9.

Word sets `w:firstColumn="1"` by default for tables.  You have to find
the Table Design tab and explicitly uncheck "First Column" to make this
go away.  In most cases, I don't think writers intend to designate
the first column as a row head, so this commit is going to produce
unexpected results.  In addition, because of the table normalization
done by pandoc-type's `tableWith`, any table containing a colspanned
cell in the left-hand column will get broken if the first column is
designated a row head.  For these reasons it seems best to revert this
change, which was made in response to #9495.

Closes #10627.

src/Text/Pandoc/Readers/Docx.hs

@@ -816,8 +816,6 @@ bodyPartToBlocks (Tbl mbsty cap grid look parts) = do
       cap' = caption shortCaption fullCaption
       (hdr, rows) = splitHeaderRows (firstRowFormatting look) parts
 
-  let rowHeadCols = if firstColumnFormatting look then 1 else 0
-
   let width = maybe 0 maximum $ nonEmpty $ map rowLength parts
       rowLength :: Docx.Row -> Int
       rowLength (Docx.Row _ c) = sum (fmap (\(Docx.Cell _ gridSpan _ _) -> fromIntegral gridSpan) c)
@@ -841,7 +839,7 @@ bodyPartToBlocks (Tbl mbsty cap grid look parts) = do
   return $ tableWith attr cap'
                  (zip alignments widths)
                  (TableHead nullAttr headerCells)
-                 [TableBody nullAttr (RowHeadColumns rowHeadCols) [] bodyCells]
+                 [TableBody nullAttr 0 [] bodyCells]
                  (TableFoot nullAttr [])
 bodyPartToBlocks HRule = pure Pandoc.horizontalRule
 

src/Text/Pandoc/Readers/Docx/Parse.hs

@@ -294,15 +294,11 @@ data BodyPart = Paragraph ParagraphStyle [ParPart]
 
 type TblGrid = [Integer]
 
-data TblLook = TblLook { firstRowFormatting ::Bool
-                       , firstColumnFormatting :: Bool
-                       }
+newtype TblLook = TblLook {firstRowFormatting::Bool}
               deriving Show
 
 defaultTblLook :: TblLook
-defaultTblLook = TblLook{ firstRowFormatting = False
-                        , firstColumnFormatting = False
-                        }
+defaultTblLook = TblLook{firstRowFormatting = False}
 
 data Row = Row TblHeader [Cell] deriving Show
 
@@ -695,25 +691,17 @@ elemToTblGrid _ _ = throwError WrongElem
 
 elemToTblLook :: NameSpaces -> Element -> D TblLook
 elemToTblLook ns element | isElem ns "w" "tblLook" element =
-  let val = findAttrByName ns "w" "val" element
+  let firstRow = findAttrByName ns "w" "firstRow" element
+      val = findAttrByName ns "w" "val" element
       firstRowFmt =
-        case findAttrByName ns "w" "firstRow" element of
+        case firstRow of
           Just "1" -> True
           Just  _  -> False
           Nothing -> case val of
             Just bitMask -> testBitMask bitMask 0x020
             Nothing      -> False
-      firstColFmt =
-        case findAttrByName ns "w" "firstColumn" element of
-          Just "1" -> True
-          Just  _  -> False
-          Nothing -> case val of
-            Just bitMask -> testBitMask bitMask 0x080
-            Nothing      -> False
   in
-   return TblLook{ firstRowFormatting = firstRowFmt
-                 , firstColumnFormatting = firstColFmt
-                 }
+   return TblLook{firstRowFormatting = firstRowFmt}
 elemToTblLook _ _ = throwError WrongElem
 
 elemToRow :: NameSpaces -> Element -> D Row

src/Text/Pandoc/Writers/Docx/Table.hs

@@ -63,7 +63,6 @@ import Text.Pandoc.XML.Light.Types
 import qualified Data.Text as T
 import qualified Text.Pandoc.Translations as Term
 import qualified Text.Pandoc.Writers.GridTable as Grid
-import Data.Bits ((.|.))
 
 tableToOpenXML :: PandocMonad m
                => WriterOptions
@@ -72,7 +71,7 @@ tableToOpenXML :: PandocMonad m
                -> WS m [Content]
 tableToOpenXML opts blocksToOpenXML gridTable = do
   setFirstPara
-  let (Grid.Table (ident,_,tableAttr) caption colspecs rowheads thead tbodies tfoot) =
+  let (Grid.Table (ident,_,tableAttr) caption colspecs _rowheads thead tbodies tfoot) =
         gridTable
   let (Caption _maybeShortCaption captionBlocks) = caption
   tablenum <- gets stNextTableNum
@@ -107,8 +106,7 @@ tableToOpenXML opts blocksToOpenXML gridTable = do
   -- 0×0100  Apply last column conditional formatting
   -- 0×0200  Do not apply row banding conditional formatting
   -- 0×0400  Do not apply column banding conditional formattin
-  let tblLookVal = (if hasHeader then (0x20 :: Int) else 0) .|.
-                   (if rowheads > 0 then (0x80 :: Int) else 0)
+  let tblLookVal = if hasHeader then (0x20 :: Int) else 0
   let (gridCols, tblWattr) = tableLayout (elems colspecs)
   listLevel <- asks envListLevel
   let tblStyle =  fromMaybe "Table" (lookup "custom-style" tableAttr)
@@ -124,7 +122,7 @@ tableToOpenXML opts blocksToOpenXML gridTable = do
             [ mknode "w:tblLayout" [("w:type", "fixed")] () | hasWidths ] ++
             [ mknode "w:tblLook" [("w:firstRow",if hasHeader then "1" else "0")
                                  ,("w:lastRow",if hasFooter then "1" else "0")
-                                 ,("w:firstColumn",if rowheads > 0 then "1" else "0")
+                                 ,("w:firstColumn","0")
                                  ,("w:lastColumn","0")
                                  ,("w:noHBand","0")
                                  ,("w:noVBand","0")