module Happstack.Helpers.HtmlOutput.Menu where
import Happstack.Server.HTTP.Types
import Text.StringTemplate.Helpers
import Happstack.Helpers.HtmlOutput.Common
{- |
Render a link which changes color when the current page is active, modulo css.
menuLink rq (url,anchortext)
similar to simpleLink, outputs an html link. However, menuLink looks at the request to determine if the page being linked to is the current page. If it is, it's in class menuitemSelected, otherwise class menuitem. if the url is blank,
the link is unclickable, just displayed gray (e.g., features that haven't been enabled but are coming soon). You need to define the classes described here via css for these features to be useful. I usually do something like in a global css file:
a.menuitem:link {color: blue}
a.menuitem:active {color: blue}
a.menuitem:visited {color: blue}
a.menuitem:hover {color: blue}
a.menuitemSelected:link {color: purple}
a.menuitemSelected:active {color: purple}
a.menuitemSelected:visited {color: purple}
a.menuitemSelected:hover {color: purple}
-}
menuLink :: Request -> (String, String) -> String
menuLink = menuLink' "menuitemSelected" "menuitem"
{- | menuLink' classSelected classUnselected rq (url,anchortext) = ...
-}
menuLink' :: String -> String -> Request -> (String, String) -> String
menuLink' classSelected classUnselected rq (url,anchortext) =
render1 [("url",url),("anchortext",anchortext),("classSelected",classSelected),("classUnselected",classUnselected)] $
if currUrl == url
then "$anchortext$"
else if null url
then "$anchortext$"
else "$anchortext$"
where currUrl = rqURL rq
vMenuOL :: Request -> [(String, String)] -> String
vMenuOL rq = paintVOL . map (menuLink rq )
vMenuUL :: Request -> [(String, String)] -> String
vMenuUL rq = paintVUL . map (menuLink rq )
-- | hMenuBars rq = paintHBars . map (menuLink rq)
hMenuBars :: Request -> [(String, String)] -> String
hMenuBars rq = paintHBars . map (menuLink rq)