diff options
Diffstat (limited to 'src/Hakyll/Web')
-rw-r--r-- | src/Hakyll/Web/Tags.hs | 80 |
1 files changed, 52 insertions, 28 deletions
diff --git a/src/Hakyll/Web/Tags.hs b/src/Hakyll/Web/Tags.hs index 328ae8b..c971b0f 100644 --- a/src/Hakyll/Web/Tags.hs +++ b/src/Hakyll/Web/Tags.hs @@ -32,6 +32,7 @@ module Hakyll.Web.Tags , readTags , readCategory , renderTagCloud + , renderTagList , renderTagsField , renderCategoryField ) where @@ -41,7 +42,7 @@ import Control.Category (id) import Control.Applicative ((<$>)) import Data.Map (Map) import qualified Data.Map as M -import Data.List (intersperse) +import Data.List (intersperse, intercalate) import Control.Arrow (arr, (&&&), (>>>), (***), (<<^), returnA) import Data.Maybe (catMaybes, fromMaybe) import Data.Monoid (mconcat) @@ -108,13 +109,17 @@ readTags = readTagsWith getTags readCategory :: [Page a] -> Tags a readCategory = readTagsWith getCategory --- | Render a tag cloud in HTML +-- | Render tags in HTML -- -renderTagCloud :: (String -> Identifier) -- ^ Produce a link for a tag - -> Double -- ^ Smallest font size, in percent - -> Double -- ^ Biggest font size, in percent - -> Compiler (Tags a) String -- ^ Tag cloud renderer -renderTagCloud makeUrl minSize maxSize = proc (Tags tags) -> do +renderTags :: (String -> Identifier) + -- ^ Produce a link + -> (String -> String -> Int -> Int -> Int -> String) + -- ^ Produce a tag item: tag, url, count, min count, max count + -> ([String] -> String) + -- ^ Join items + -> Compiler (Tags a) String + -- ^ Tag cloud renderer +renderTags makeUrl makeItem concatItems = proc (Tags tags) -> do -- In tags' we create a list: [((tag, route), count)] tags' <- mapCompiler ((id &&& (getRouteFor <<^ makeUrl)) *** arr length) -< M.toList tags @@ -122,27 +127,46 @@ renderTagCloud makeUrl minSize maxSize = proc (Tags tags) -> do let -- Absolute frequencies of the pages freqs = map snd tags' - -- Find out the relative count of a tag: on a scale from 0 to 1 - relative count = (fromIntegral count - min') / (1 + max' - min') - - -- Show the relative size of one 'count' in percent - size count = - let size' = floor $ minSize + relative count * (maxSize - minSize) - in show (size' :: Int) ++ "%" - - -- The minimum and maximum count found, as doubles + -- The minimum and maximum count found (min', max') | null freqs = (0, 1) - | otherwise = (minimum &&& maximum) $ map fromIntegral freqs + | otherwise = (minimum &&& maximum) freqs -- Create a link for one item - makeLink ((tag, url), count) = - H.a ! A.style (toValue $ "font-size: " ++ size count) - ! A.href (toValue $ toUrl $ fromMaybe "/" url) - $ toHtml tag + makeItem' ((tag, url), count) = + makeItem tag (toUrl $ fromMaybe "/" url) count min' max' -- Render and return the HTML - returnA -< renderHtml $ mconcat $ intersperse " " $ map makeLink tags' + returnA -< concatItems $ map makeItem' tags' + +-- | Render a tag cloud in HTML +-- +renderTagCloud :: (String -> Identifier) -- ^ Produce a link for a tag + -> Double -- ^ Smallest font size, in percent + -> Double -- ^ Biggest font size, in percent + -> Compiler (Tags a) String -- ^ Tag cloud renderer +renderTagCloud makeUrl minSize maxSize = + renderTags makeUrl makeLink (intercalate " ") + where + makeLink tag url count min' max' = renderHtml $ + H.a ! A.style (toValue $ "font-size: " ++ size count min' max') + ! A.href (toValue url) + $ toHtml tag + + -- Show the relative size of one 'count' in percent + size count min' max' = + let diff = 1 + fromIntegral max' - fromIntegral min' + relative = (fromIntegral count - fromIntegral min') / diff + size' = floor $ minSize + relative * (maxSize - minSize) + in show (size' :: Int) ++ "%" + +-- | Render a simple tag list in HTML, with the tag count next to the item +-- +renderTagList :: (String -> Identifier) -> Compiler (Tags a) (String) +renderTagList makeUrl = renderTags makeUrl makeLink (intercalate ", ") + where + makeLink tag url count _ _ = renderHtml $ + H.a ! A.href (toValue url) $ toHtml (tag ++ "(" ++ show count ++ ")") -- | Render tags with links -- @@ -151,14 +175,14 @@ renderTagsFieldWith :: (Page a -> [String]) -- ^ Function to get the tags -> (String -> Identifier) -- ^ Create a link for a tag -> Compiler (Page a) (Page a) -- ^ Resulting compiler renderTagsFieldWith tags destination makeUrl = - id &&& arr tags >>> setFieldA destination renderTags + id &&& arr tags >>> setFieldA destination renderTags' where -- Compiler creating a comma-separated HTML string for a list of tags - renderTags :: Compiler [String] String - renderTags = arr (map $ id &&& makeUrl) - >>> mapCompiler (id *** getRouteFor) - >>> arr (map $ uncurry renderLink) - >>> arr (renderHtml . mconcat . intersperse ", " . catMaybes) + renderTags' :: Compiler [String] String + renderTags' = arr (map $ id &&& makeUrl) + >>> mapCompiler (id *** getRouteFor) + >>> arr (map $ uncurry renderLink) + >>> arr (renderHtml . mconcat . intersperse ", " . catMaybes) -- Render one tag link renderLink _ Nothing = Nothing |