docbook2txt: clean up some code
- Introduce pattern synonym `TextLeaf` for `TagLeaf (TagText)` - Convert `replaceTagColor` to use "case-of" pattern matching
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@ -9,6 +9,8 @@
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-- consumed by pandoc anyway. So instead, I am just planning on keeping
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-- my own module parsing raw xml tags (for now).
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{-# LANGUAGE PatternSynonyms #-}
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import Data.List (find, intersperse)
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import Data.List.Split (splitOn)
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import qualified System.Console.ANSI as AN
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@ -67,120 +69,121 @@ wrapTxt delimiter string = concat [delimiter, string, delimiter]
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bold :: AN.SGR
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bold = AN.SetConsoleIntensity AN.BoldIntensity
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pattern TextLeaf a = TS.TagLeaf (TS.TagText a)
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-- Replace tags with their PCS string equivalent.
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replaceTagColor :: TS.TagTree String -> PotentiallyColorizedString
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replaceTagColor (TS.TagLeaf (TS.TagText s)) =
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PCS
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{ colorized = putStr s,
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nonColorized = s
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}
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replaceTagColor (TS.TagBranch "para" _ inner) =
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PCS
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{ colorized = mapM_ (colorized . replaceTagColor) inner,
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nonColorized = concatMap (nonColorized . replaceTagColor) inner
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}
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replaceTagColor (TS.TagBranch "code" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "command" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "filename" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapColor AN.Yellow content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "emphasis" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapSGR bold content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "literal" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapColor AN.Red content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "varname" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapColor AN.Red content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "link" [("xlink:href", link)] []) =
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PCS
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{ colorized = wrapColor AN.Blue link,
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nonColorized = concat ["`", link, "`"]
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}
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replaceTagColor (TS.TagBranch "link" [("xlink:href", link)] [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapColor AN.Blue $ concat [content, " (", link, ")"],
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nonColorized = concat ["`", content, " (", link, ")`"]
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}
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replaceTagColor (TS.TagBranch "option" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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replaceTagColor (TS.TagBranch "envar" _ [TS.TagLeaf (TS.TagText content)]) =
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PCS
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{ colorized = wrapSGR bold $ concat ["`$", content, "`"],
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nonColorized = concat ["`$", content, "`"]
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}
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replaceTagColor (TS.TagBranch "quote" _ inner) =
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PCS
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{ colorized = sequence_ [putStr "\"", mapM_ (colorized . replaceTagColor) inner, putStr "\""],
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nonColorized = wrapTxt "\"" $ concatMap (nonColorized . replaceTagColor) inner
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}
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replaceTagColor (TS.TagBranch "warning" _ inner) =
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PCS
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{ colorized = sequence_ [wrapColor AN.Red "WARNING: ", mapM_ (colorized . replaceTagColor) inner],
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nonColorized = "WARNING: " ++ concatMap (nonColorized . replaceTagColor) inner
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}
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replaceTagColor (TS.TagBranch "xref" [("linkend", link)] []) =
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PCS
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{ colorized = sequence_ $ [putStr "`"] ++ formattedLink ++ [putStr "`"],
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nonColorized = wrapTxt "`" link
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}
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where
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removeOptPrefix :: String -> String
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removeOptPrefix ('o' : 'p' : 't' : '-' : rest) = rest
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removeOptPrefix x = x
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replaceTagColor tagtree = case tagtree of
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TS.TagLeaf (TS.TagText s) ->
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PCS
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{ colorized = putStr s,
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nonColorized = s
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}
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TS.TagBranch "para" _ inner ->
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PCS
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{ colorized = mapM_ (colorized . replaceTagColor) inner,
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nonColorized = concatMap (nonColorized . replaceTagColor) inner
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}
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TS.TagBranch "code" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "command" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "filename" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapColor AN.Yellow content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "emphasis" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapSGR bold content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "literal" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapColor AN.Red content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "varname" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapColor AN.Red content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "link" [("xlink:href", link)] [] ->
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PCS
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{ colorized = wrapColor AN.Blue link,
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nonColorized = concat ["`", link, "`"]
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}
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TS.TagBranch "link" [("xlink:href", link)] [TextLeaf content] ->
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PCS
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{ colorized = wrapColor AN.Blue $ concat [content, " (", link, ")"],
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nonColorized = concat ["`", content, " (", link, ")`"]
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}
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TS.TagBranch "option" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapSGR bold $ wrapTxt "`" content,
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nonColorized = wrapTxt "`" content
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}
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TS.TagBranch "envar" _ [TextLeaf content] ->
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PCS
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{ colorized = wrapSGR bold $ concat ["`$", content, "`"],
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nonColorized = concat ["`$", content, "`"]
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}
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TS.TagBranch "quote" _ inner ->
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PCS
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{ colorized = sequence_ [putStr "\"", mapM_ (colorized . replaceTagColor) inner, putStr "\""],
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nonColorized = wrapTxt "\"" $ concatMap (nonColorized . replaceTagColor) inner
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}
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TS.TagBranch "warning" _ inner ->
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PCS
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{ colorized = sequence_ [wrapColor AN.Red "WARNING: ", mapM_ (colorized . replaceTagColor) inner],
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nonColorized = "WARNING: " ++ concatMap (nonColorized . replaceTagColor) inner
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}
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TS.TagBranch "xref" [("linkend", link)] [] ->
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let removeOptPrefix :: String -> String
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removeOptPrefix ('o' : 'p' : 't' : '-' : rest) = rest
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removeOptPrefix x = x
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replaceName :: String -> IO ()
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replaceName x = if x == "_name_" then wrapColor AN.Red "<name>" else wrapSGR bold x
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replaceName :: String -> IO ()
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replaceName x = if x == "_name_" then wrapColor AN.Red "<name>" else wrapSGR bold x
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formattedLink :: [IO ()]
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formattedLink = intersperse (wrapSGR bold ".") $ map replaceName $ splitOn "." $ removeOptPrefix link
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replaceTagColor (TS.TagBranch "citerefentry" _ content) =
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PCS
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{ colorized = wrapColor AN.Blue combinedLink,
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nonColorized = combinedLink
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}
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where
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tagBranchTagMatches :: String -> TS.TagTree String -> Bool
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tagBranchTagMatches x (TS.TagBranch tag _ _) = tag == x
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tagBranchTagMatches _ _ = False
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formattedLink :: [IO ()]
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formattedLink = intersperse (wrapSGR bold ".") $ map replaceName $ splitOn "." $ removeOptPrefix link
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in PCS
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{ colorized = sequence_ $ [putStr "`"] ++ formattedLink ++ [putStr "`"],
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nonColorized = wrapTxt "`" link
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}
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TS.TagBranch "citerefentry" _ content ->
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let tagBranchTagMatches :: String -> TS.TagTree String -> Bool
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tagBranchTagMatches x (TS.TagBranch tag _ _) = tag == x
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tagBranchTagMatches _ _ = False
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title :: Maybe String
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title = case find (tagBranchTagMatches "refentrytitle") content of
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Just (TS.TagBranch _ _ [TS.TagLeaf (TS.TagText str)]) -> Just str
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_ -> Nothing
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title :: Maybe String
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title = case find (tagBranchTagMatches "refentrytitle") content of
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Just (TS.TagBranch _ _ [TextLeaf str]) -> Just str
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_ -> Nothing
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volumNum :: Maybe String
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volumNum = case find (tagBranchTagMatches "manvolnum") content of
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Just (TS.TagBranch _ _ [TS.TagLeaf (TS.TagText str)]) -> Just str
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_ -> Nothing
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volumNum :: Maybe String
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volumNum = case find (tagBranchTagMatches "manvolnum") content of
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Just (TS.TagBranch _ _ [TextLeaf str]) -> Just str
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_ -> Nothing
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combinedLink :: String
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combinedLink = case (title, volumNum) of
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(Just t, Just vn) -> concat [t, "(", vn, ")"]
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(Just t, Nothing) -> t
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_ -> "???"
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replaceTagColor unknown =
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PCS
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{ colorized = wrapColor AN.Red $ TS.renderTree [unknown],
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nonColorized = TS.renderTree [unknown]
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}
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combinedLink :: String
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combinedLink = case (title, volumNum) of
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(Just t, Just vn) -> concat [t, "(", vn, ")"]
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(Just t, Nothing) -> t
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_ -> "???"
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in PCS
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{ colorized = wrapColor AN.Blue combinedLink,
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nonColorized = combinedLink
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}
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unknown ->
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PCS
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{ colorized = wrapColor AN.Red $ TS.renderTree [unknown],
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nonColorized = TS.renderTree [unknown]
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}
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