-- | Formats Haskell source code as HTML with inline CSS.
module Language.Haskell.HsColour.InlineCSS (hscolour,top'n'tail) where
import Language.Haskell.HsColour.Anchors
import Language.Haskell.HsColour.Classify as Classify
import Language.Haskell.HsColour.Colourise
import Language.Haskell.HsColour.HTML (renderAnchors, renderComment,
renderNewLinesAnchors, escape)
import Text.Printf
-- | Formats Haskell source code as a complete HTML document with inline styling
hscolour :: ColourPrefs -- ^ Preferences for styling.
-> Bool -- ^ Whether to include anchors.
-> String -- ^ Haskell source code.
-> String -- ^ An HTML document containing the coloured
-- Haskell source code.
hscolour prefs anchor =
pre
. (if anchor
then renderNewLinesAnchors
. concatMap (renderAnchors (renderToken prefs))
. insertAnchors
else concatMap (renderToken prefs))
. tokenise
top'n'tail :: String -> String -> String
top'n'tail title = (cssPrefix title ++) . (++cssSuffix)
pre :: String -> String
pre = (""++)
. (++"")
renderToken :: ColourPrefs -> (TokenType,String) -> String
renderToken prefs (cls,text) =
stylise (colourise prefs cls) $
if cls == Comment then renderComment text else escape text
stylise :: [Highlight] -> String -> String
stylise hs s = "" ++s++ ""
cssPrefix title = unlines
[""
,""
,""
,""
,""
,""++title++""
,""
,""
]
cssSuffix = unlines
[""
,""
]
style :: Highlight -> String
style Normal = ""
style Bold = "font-weight: bold;"
style Dim = "font-weight: lighter;"
style Underscore = "text-decoration: underline;"
style Blink = "text-decoration: blink;"
style ReverseVideo = ""
style Concealed = "text-decoration: line-through;"
style (Foreground c) = "color: "++csscolour c++";"
style (Background c) = "background-color: "++csscolour c++";"
style Italic = "font-style: italic;"
csscolour :: Colour -> String
csscolour Black = "#000000"
csscolour Red = "#ff0000"
csscolour Green = "#00ff00"
csscolour Yellow = "#ffff00"
csscolour Blue = "#0000ff"
csscolour Magenta = "#ff00ff"
csscolour Cyan = "#00ffff"
csscolour White = "#ffffff"
csscolour (Rgb r g b) = printf "#%02x%02x%02x" r g b