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{-# LANGUAGE FlexibleContexts #-}
{-
Copyright (C) 2009 John MacFarlane <jgm@berkeley.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
{- Functions and data structures for wiki page layout.
-}
module Network.Gitit.Layout ( defaultPageLayout
, defaultRenderPage
, formattedPage
, filledPageTemplate
, uploadsAllowed
)
where
import Network.Gitit.Server
import Network.Gitit.Framework
import Network.Gitit.State
import Network.Gitit.Types
import Network.Gitit.Export (exportFormats)
import Network.HTTP (urlEncodeVars)
import qualified Text.StringTemplate as T
import Prelude hiding (catch)
import Text.XHtml hiding ( (</>), dir, method, password, rev )
import Text.XHtml.Strict ( stringToHtmlString )
import Data.Maybe (isNothing, isJust, fromJust)
defaultPageLayout :: PageLayout
defaultPageLayout = PageLayout
{ pgPageName = ""
, pgRevision = Nothing
, pgPrintable = False
, pgMessages = []
, pgTitle = ""
, pgScripts = []
, pgShowPageTools = True
, pgShowSiteNav = True
, pgMarkupHelp = Nothing
, pgTabs = [ViewTab, EditTab, HistoryTab, DiscussTab]
, pgSelectedTab = ViewTab
, pgLinkToFeed = False
}
-- | Returns formatted page
formattedPage :: PageLayout -> Html -> Handler
formattedPage layout htmlContents = do
renderer <- queryGititState renderPage
renderer layout htmlContents
-- | Given a compiled string template, returns a page renderer.
defaultRenderPage :: T.StringTemplate String -> PageLayout -> Html -> Handler
defaultRenderPage templ layout htmlContents = do
cfg <- getConfig
base' <- getWikiBase
ok . setContentType "text/html; charset=utf-8" . toResponse . T.render .
filledPageTemplate base' cfg layout htmlContents $ templ
-- | Returns a page template with gitit variables filled in.
filledPageTemplate :: String -> Config -> PageLayout -> Html ->
T.StringTemplate String -> T.StringTemplate String
filledPageTemplate base' cfg layout htmlContents templ =
let rev = pgRevision layout
page = pgPageName layout
prefixedScript x = case x of
'h':'t':'t':'p':_ -> x
_ -> base' ++ "/js/" ++ x
scripts = ["jquery.min.js", "jquery-ui.packed.js", "footnotes.js"] ++ pgScripts layout
scriptLink x = script ! [src (prefixedScript x),
thetype "text/javascript"] << noHtml
javascriptlinks = renderHtmlFragment $ concatHtml $ map scriptLink scripts
tabli tab = if tab == pgSelectedTab layout
then li ! [theclass "selected"]
else li
tabs' = [x | x <- pgTabs layout,
not (x == EditTab && page `elem` noEdit cfg)]
tabs = ulist ! [theclass "tabs"] << map (linkForTab tabli base' page rev) tabs'
setStrAttr attr = T.setAttribute attr . stringToHtmlString
setBoolAttr attr test = if test then T.setAttribute attr "true" else id
in T.setAttribute "base" base' .
T.setAttribute "feed" (pgLinkToFeed layout) .
setStrAttr "wikititle" (wikiTitle cfg) .
setStrAttr "pagetitle" (pgTitle layout) .
T.setAttribute "javascripts" javascriptlinks .
setStrAttr "pagename" page .
setStrAttr "pageUrl" (urlForPage page) .
setBoolAttr "ispage" (isPage page) .
setBoolAttr "pagetools" (pgShowPageTools layout) .
setBoolAttr "sitenav" (pgShowSiteNav layout) .
maybe id (T.setAttribute "markuphelp") (pgMarkupHelp layout) .
setBoolAttr "printable" (pgPrintable layout) .
maybe id (T.setAttribute "revision") rev .
T.setAttribute "exportbox"
(renderHtmlFragment $ exportBox base' cfg page rev) .
T.setAttribute "tabs" (renderHtmlFragment tabs) .
T.setAttribute "messages" (pgMessages layout) .
T.setAttribute "usecache" (useCache cfg) .
T.setAttribute "content" (renderHtmlFragment htmlContents) .
setBoolAttr "wikiupload" ( uploadsAllowed cfg) $
templ
exportBox :: String -> Config -> String -> Maybe String -> Html
exportBox base' cfg page rev | not (isSourceCode page) =
gui (base' ++ urlForPage page) ! [identifier "exportbox"] <<
([ textfield "revision" ! [thestyle "display: none;",
value (fromJust rev)] | isJust rev ] ++
[ select ! [name "format"] <<
map ((\f -> option ! [value f] << f) . fst) (exportFormats cfg)
, primHtmlChar "nbsp"
, submit "export" "Export" ])
exportBox _ _ _ _ = noHtml
-- auxiliary functions:
linkForTab :: (Tab -> Html -> Html) -> String -> String -> Maybe String -> Tab -> Html
linkForTab tabli base' page _ HistoryTab =
tabli HistoryTab << anchor ! [href $ base' ++ "/_history" ++ urlForPage page] << "history"
linkForTab tabli _ _ _ DiffTab =
tabli DiffTab << anchor ! [href ""] << "diff"
linkForTab tabli base' page rev ViewTab =
let origPage s = if isDiscussPage s
then drop 1 s
else s
in if isDiscussPage page
then tabli DiscussTab << anchor !
[href $ base' ++ urlForPage (origPage page)] << "page"
else tabli ViewTab << anchor !
[href $ base' ++ urlForPage page ++
case rev of
Just r -> "?revision=" ++ r
Nothing -> ""] << "view"
linkForTab tabli base' page _ DiscussTab =
tabli (if isDiscussPage page then ViewTab else DiscussTab) <<
anchor ! [href $ base' ++ if isDiscussPage page then "" else "/_discuss" ++
urlForPage page] << "discuss"
linkForTab tabli base' page rev EditTab =
tabli EditTab << anchor !
[href $ base' ++ "/_edit" ++ urlForPage page ++
case rev of
Just r -> "?revision=" ++ r ++ "&" ++
urlEncodeVars [("logMsg", "Revert to " ++ r)]
Nothing -> ""] << if isNothing rev
then "edit"
else "revert"
uploadsAllowed :: Config -> Bool
uploadsAllowed = (0 <) . maxUploadSize
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