module Codec.Xlsx.Writer (
writeXlsx,
writeXlsxStyles
) where
import qualified Codec.Archive.Zip as Zip
import Control.Monad.Trans.State
import Data.ByteString.Lazy.Char8()
import qualified Data.ByteString.Lazy as L
import Data.List
import qualified Data.Map as M
import Data.Maybe
import Data.Text (Text)
import qualified Data.Text as T
import Data.Text.Lazy (toStrict)
import Data.Text.Lazy.Builder (toLazyText)
import Data.Text.Lazy.Builder.Int
import Data.Text.Lazy.Builder.RealFloat
import Data.Time.Calendar
import Data.Time.LocalTime
import System.Locale
import System.Time
import Text.XML
import Codec.Xlsx
writeXlsx :: FilePath -> [Worksheet] -> IO ()
writeXlsx p = writeXlsxStyles p emptyStylesXml
writeXlsxStyles :: FilePath -> L.ByteString -> [Worksheet] -> IO ()
writeXlsxStyles p s d = constructXlsx s d >>= L.writeFile p
data FileData = FileData { fdName :: Text
, fdContentType :: Text
, fdContents :: L.ByteString}
constructXlsx :: L.ByteString -> [Worksheet] -> IO L.ByteString
constructXlsx s ws = do
ct <- getClockTime
let
TOD t _ = ct
utct = toUTCTime ct
(sheetCells, shared) = runState (mapM collectSharedTransform ws) []
sheetNumber = length ws
sheetFiles = [FileData (T.concat ["xl/worksheets/sheet", txti n, ".xml"]) "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml" $
sheetXml (wsColumns w) (wsRowHeights w) cells | (n, cells, w) <- zip3 [1..] sheetCells ws]
files = sheetFiles ++
[ FileData "docProps/core.xml" "application/vnd.openxmlformats-package.core-properties+xml" $ coreXml utct "xlsxwriter"
, FileData "docProps/app.xml" "application/vnd.openxmlformats-officedocument.extended-properties+xml" appXml
, FileData "xl/workbook.xml" "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml" $ bookXml ws
, FileData "xl/styles.xml" "application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml" s
, FileData "xl/sharedStrings.xml" "application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml" $ ssXml shared
, FileData "xl/_rels/workbook.xml.rels" "application/vnd.openxmlformats-package.relationships+xml" $ bookRelXml sheetNumber
, FileData "_rels/.rels" "application/vnd.openxmlformats-package.relationships+xml" rootRelXml ]
entries = Zip.toEntry "[Content_Types].xml" t (contentTypesXml files) :
map (\fd -> Zip.toEntry (T.unpack $ fdName fd) t (fdContents fd)) files
ar = foldr Zip.addEntryToArchive Zip.emptyArchive entries
return $ Zip.fromArchive ar
coreXml :: CalendarTime -> Text -> L.ByteString
coreXml created creator =
renderLBS def $ Document (Prologue [] Nothing []) root []
where
date = T.pack $ formatCalendarTime defaultTimeLocale "%Y-%m-%dT%H:%M:%SZ" created
nsAttrs = [("xmlns:dcterms", "http://purl.org/dc/terms/")]
root = Element (nm "http://schemas.openxmlformats.org/package/2006/metadata/core-properties" "coreProperties") nsAttrs
[nEl (nm "http://purl.org/dc/terms/" "created")
[(nm "http://www.w3.org/2001/XMLSchema-instance" "type", "dcterms:W3CDTF")] [NodeContent date],
nEl (nm "http://purl.org/dc/elements/1.1/" "creator") [] [NodeContent creator],
nEl (nm "http://schemas.openxmlformats.org/package/2006/metadata/core-properties" "version") [] [NodeContent "0"]]
appXml :: L.ByteString
appXml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\
\<Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\" xmlns:vt=\"http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes\"><TotalTime>0</TotalTime></Properties>"
data XlsxCellData = XlsxSS Int | XlsxDouble Double
data XlsxCell = XlsxCell{ xlsxCellStyle :: Maybe Int
, xlsxCellValue :: Maybe XlsxCellData
}
xlsxCellType :: XlsxCell -> Text
xlsxCellType XlsxCell{xlsxCellValue=Just(XlsxSS _)} = "s"
xlsxCellType _ = "n"
value :: XlsxCell -> Text
value XlsxCell{xlsxCellValue=Just(XlsxSS i)} = txti i
value XlsxCell{xlsxCellValue=Just(XlsxDouble d)} = txtd d
value _ = error "value undefined"
collectSharedTransform :: Worksheet -> State [Text] [[XlsxCell]]
collectSharedTransform d = transformed
where
transformed = mapM (mapM transform) $ toList d
transform Nothing = return $ XlsxCell Nothing Nothing
transform (Just CellData{cdValue=v, cdStyle=s}) =
case v of
Just(CellText t) -> do
shared <- get
case t `elemIndex` shared of
Just i ->
return $ XlsxCell s (Just $ XlsxSS i)
Nothing -> do
put $ shared ++ [t]
return $ XlsxCell s (Just $ XlsxSS (length shared))
Just(CellDouble dbl) ->
return $ XlsxCell s (Just $ XlsxDouble dbl)
Just(CellLocalTime t) ->
return $ XlsxCell s (Just $ XlsxDouble (xlsxDoubleTime t))
Nothing ->
return $ XlsxCell s Nothing
xlsxDoubleTime :: LocalTime -> Double
xlsxDoubleTime LocalTime{localDay=day,localTimeOfDay=time} =
fromIntegral (diffDays day xlsxEpochStart) + timeFraction time
where
xlsxEpochStart = fromGregorian 1899 12 30
timeFraction = fromRational . timeOfDayToDayFraction
sheetXml :: [ColumnsWidth] -> RowHeights -> [[XlsxCell]] -> L.ByteString
sheetXml cws rh d = renderLBS def $ Document (Prologue [] Nothing []) root []
where
rows = zip [1..] d
numCols = zip [int2col n | n <- [1..]]
cType = xlsxCellType
root = addNS "http://schemas.openxmlformats.org/spreadsheetml/2006/main" $
Element "worksheet" []
[nEl "cols" [] $ map cwEl cws,
nEl "sheetData" [] $ map rowEl rows]
cwEl cw = NodeElement $! Element "col"
[("min", txti $ cwMin cw), ("max", txti $ cwMax cw), ("width", txtd $ cwWidth cw)] []
rowEl (r, cells) = nEl "row"
(ht ++ [("r", txti r), ("hidden", "false"), ("outlineLevel", "0"),
("collapsed", "false"), ("customFormat", "false"),
("customHeight", txtb hasHeight)])
$ map (cellEl r) (numCols cells)
where
(ht, hasHeight) = case M.lookup r rh of
Just h -> ([("ht", txtd h)], True)
Nothing -> ([], False)
cellEl r (col, cell) =
nEl "c" (cellAttrs r col cell) [nEl "v" [] [NodeContent $ value cell] | isJust $ xlsxCellValue cell]
cellAttrs r col cell = cellStyleAttr cell ++ [("r", T.concat [col, txti r]), ("t", cType cell)]
cellStyleAttr XlsxCell{xlsxCellStyle=Nothing} = []
cellStyleAttr XlsxCell{xlsxCellStyle=Just s} = [("s", txti s)]
bookXml :: [Worksheet] -> L.ByteString
bookXml wss = renderLBS def $ Document (Prologue [] Nothing []) root []
where
numNames = [(txti i, wsName ws) | (i, ws) <- zip [1..] wss]
root = addNS "http://schemas.openxmlformats.org/spreadsheetml/2006/main" $ Element "workbook" []
[nEl "sheets" [] $
map (\(n, name) -> nEl "sheet"
[("name", name), ("sheetId", n), ("state", "visible"),
(rId, T.concat ["rId", n])] []) numNames]
rId = nm "http://schemas.openxmlformats.org/officeDocument/2006/relationships" "id"
emptyStylesXml :: L.ByteString
emptyStylesXml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\
\<styleSheet xmlns=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\"></styleSheet>"
ssXml :: [Text] -> L.ByteString
ssXml ss =
renderLBS def $ Document (Prologue [] Nothing []) root []
where
root = addNS "http://schemas.openxmlformats.org/spreadsheetml/2006/main" $ Element "sst" [] $
map (\s -> nEl "si" [] [nEl "t" [] [NodeContent s]]) ss
bookRelXml :: Int -> L.ByteString
bookRelXml n = renderLBS def $ Document (Prologue [] Nothing []) root []
where
root = addNS "http://schemas.openxmlformats.org/package/2006/relationships" $
Element "Relationships" [] $
map (\sn -> relEl sn (T.concat ["worksheets/sheet", txti sn, ".xml"]) "worksheet") [1..n]
++
[relEl (n + 1) "styles.xml" "styles", relEl (n + 2) "sharedStrings.xml" "sharedStrings"]
relEl i target typ =
nEl "Relationship"
[("Id", T.concat ["rId", txti i]), ("Target", target),
("Type", T.concat ["http://schemas.openxmlformats.org/officeDocument/2006/relationships/", typ])] []
rootRelXml :: L.ByteString
rootRelXml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\
\<Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\"><Relationship Id=\"rId1\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument\" Target=\"xl/workbook.xml\"/><Relationship Id=\"rId2\" Type=\"http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties\" Target=\"docProps/core.xml\"/><Relationship Id=\"rId3\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties\" Target=\"docProps/app.xml\"/></Relationships>"
contentTypesXml :: [FileData] -> L.ByteString
contentTypesXml fds = renderLBS def $ Document (Prologue [] Nothing []) root []
where
root = addNS "http://schemas.openxmlformats.org/package/2006/content-types" $
Element "Types" [] $
map (\fd -> nEl "Override" [("PartName", T.concat ["/", fdName fd]),
("ContentType", fdContentType fd)] []) fds
nm :: Text -> Text -> Name
nm ns n = Name
{ nameLocalName = n
, nameNamespace = Just ns
, namePrefix = Nothing}
addNS :: Text -> Element -> Element
addNS namespace (Element (Name ln _ _) as ns) = Element (Name ln (Just namespace) Nothing) as (map addNS' ns)
where
addNS' (NodeElement e) = NodeElement $ addNS namespace e
addNS' n = n
nEl :: Name -> [(Name, Text)] -> [Node] -> Node
nEl name attrs nodes = NodeElement $ Element name attrs nodes
txti :: Int -> Text
txti = toStrict . toLazyText . decimal
txtd :: Double -> Text
txtd = toStrict . toLazyText . realFloat
txtb :: Bool -> Text
txtb = T.toLower . T.pack . show