diff options
Diffstat (limited to 'src/Haddock/Backends')
| -rw-r--r-- | src/Haddock/Backends/Xhtml/Themes.hs | 92 |
1 files changed, 51 insertions, 41 deletions
diff --git a/src/Haddock/Backends/Xhtml/Themes.hs b/src/Haddock/Backends/Xhtml/Themes.hs index 3274b842..39f698fc 100644 --- a/src/Haddock/Backends/Xhtml/Themes.hs +++ b/src/Haddock/Backends/Xhtml/Themes.hs @@ -35,18 +35,23 @@ import qualified Text.XHtml as XHtml -- * CSS Themes -------------------------------------------------------------------------------- -data CssTheme = CssTheme { +data Theme = Theme { themeName :: String, themeHref :: String, themeFiles :: [FilePath] } +type Themes = [Theme] -type Themes = [CssTheme] +type PossibleTheme = Either String Theme +type PossibleThemes = Either String Themes -type PossibleTheme = Either String CssTheme -type PossibleThemes = Either String Themes +-- | Find a theme by name (case insensitive match) +findTheme :: String -> Themes -> Maybe Theme +findTheme s = listToMaybe . filter ((== ls).lower.themeName) + where lower = map toLower + ls = lower s -- | Standard theme used by default @@ -55,6 +60,8 @@ standardTheme libDir = liftM (liftEither (take 1)) (defaultThemes libDir) -- | Default themes that are part of Haddock; added with --default-themes +-- First default theme is the standard theme. At present, hard coded to "Ocean" +-- if present. defaultThemes :: FilePath -> IO PossibleThemes defaultThemes libDir = do themeDirs <- getDirectoryItems (libDir </> "html" </> "themes") @@ -65,19 +72,45 @@ defaultThemes libDir = do isStd c = themeName c == "Ocean" -findTheme :: String -> Themes -> Maybe CssTheme -findTheme s = listToMaybe . filter ((== ls).lower.themeName) - where lower = map toLower - ls = lower s +-- | Build a theme from a single .css file +singleFileTheme :: FilePath -> IO PossibleTheme +singleFileTheme path = + if isCssFilePath path + then retRight $ Theme name file [path] + else errMessage "File extension isn't .css" path + where + name = takeBaseName path + file = takeFileName path + + +-- | Build a theme from a directory +directoryTheme :: FilePath -> IO PossibleTheme +directoryTheme path = do + items <- getDirectoryItems path + case filter isCssFilePath items of + [cf] -> retRight $ Theme (takeBaseName path) (takeFileName cf) items + [] -> errMessage "No .css file in theme directory" path + _ -> errMessage "More than one .css file in theme directory" path + + +-- | Check if we have a built in theme +doesBuiltInExist :: IO PossibleThemes -> String -> IO Bool +doesBuiltInExist pts s = pts >>= return . either (const False) test + where test = isJust . findTheme s + + +-- | Find a built in theme +builtInTheme :: IO PossibleThemes -> String -> IO PossibleTheme +builtInTheme pts s = pts >>= return . either Left fetch + where fetch = maybe (Left ("Unknown theme: " ++ s)) Right . findTheme s -------------------------------------------------------------------------------- -- * CSS Theme Arguments -------------------------------------------------------------------------------- - -- | Process input flags for CSS Theme arguments -getThemes :: FilePath -> [Flag] -> IO (Either String Themes) +getThemes :: FilePath -> [Flag] -> IO PossibleThemes getThemes libDir flags = liftM concatEither (mapM themeFlag flags) >>= someTheme where @@ -88,9 +121,9 @@ getThemes libDir flags = theme :: FilePath -> IO PossibleTheme theme path = pick path - [(doesFileExist, singleFileTheme), - (doesDirectoryExist, directoryTheme), - (doesBuiltInExist builtIns, builtInTheme builtIns)] + [(doesFileExist, singleFileTheme), + (doesDirectoryExist, directoryTheme), + (doesBuiltInExist builtIns, builtInTheme builtIns)] "Theme not found" pick :: FilePath @@ -118,34 +151,9 @@ retRight :: a -> IO (Either String a) retRight = return . Right -singleFileTheme :: FilePath -> IO PossibleTheme -singleFileTheme path = - if isCssFilePath path - then retRight $ CssTheme name file [path] - else errMessage "File extension isn't .css" path - where - name = takeBaseName path - file = takeFileName path - - -directoryTheme :: FilePath -> IO PossibleTheme -directoryTheme path = do - items <- getDirectoryItems path - case filter isCssFilePath items of - [cf] -> retRight $ CssTheme (takeBaseName path) (takeFileName cf) items - [] -> errMessage "No .css file in theme directory" path - _ -> errMessage "More than one .css file in theme directory" path - - -doesBuiltInExist :: IO PossibleThemes -> String -> IO Bool -doesBuiltInExist pts s = pts >>= return . either (const False) test - where test = isJust . findTheme s - - -builtInTheme :: IO PossibleThemes -> String -> IO PossibleTheme -builtInTheme pts s = pts >>= return . either Left fetch - where fetch = maybe (Left ("Unknown theme: " ++ s)) Right . findTheme s - +-------------------------------------------------------------------------------- +-- * File Utilities +-------------------------------------------------------------------------------- getDirectoryItems :: FilePath -> IO [FilePath] getDirectoryItems path = @@ -207,9 +215,11 @@ styleMenu ts = thediv ! [identifier "style-menu-holder"] << [ sequenceEither :: [Either a b] -> Either a [b] sequenceEither es = maybe (Right $ rights es) Left (listToMaybe (lefts es)) + liftEither :: (b -> c) -> Either a b -> Either a c liftEither f = either Left (Right . f) + concatEither :: [Either a [b]] -> Either a [b] concatEither = liftEither concat . sequenceEither |