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{-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
{-
Bustle.Diagram: My First Type-Safe Markup Library
Copyright © 2011 Will Thompson
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-}
module Bustle.Markup
( Markup
, unMarkup
, tag
, b
, i
, light
, red
, a
, escape
, formatMember
)
where
import Data.Monoid
import Data.Text (Text)
import qualified Data.Text as T
import Graphics.Rendering.Pango.BasicTypes (Weight(..))
import Graphics.Rendering.Pango.Layout (escapeMarkup)
import Graphics.Rendering.Pango.Markup (markSpan, SpanAttribute(..))
import Bustle.Types (ObjectPath, formatObjectPath, InterfaceName, formatInterfaceName, MemberName, formatMemberName)
newtype Markup = Markup { unMarkup :: String }
deriving (Show, Read, Ord, Eq)
instance Monoid Markup where
mempty = Markup ""
mappend x y = Markup (unMarkup x `mappend` unMarkup y)
mconcat = Markup . mconcat . map unMarkup
--raw :: String -> Markup
--raw = Markup
tag :: String -> Markup -> Markup
tag name contents =
Markup $ concat [ "<", name, ">"
, unMarkup contents
, "</", name, ">"
]
b, i :: Markup -> Markup
b = tag "b"
i = tag "i"
a :: String
-> String
-> Markup
a href contents =
Markup $ concat [ "<a href=\"", escapeMarkup href, "\">"
, escapeMarkup contents
, "</a>"
]
span_ :: [SpanAttribute] -> Markup -> Markup
span_ attrs = Markup . markSpan attrs . unMarkup
light :: Markup -> Markup
light = span_ [FontWeight WeightLight]
red :: Markup -> Markup
red = span_ [FontForeground "#ff0000"]
-- Kind of a transitional measure because some strings are Strings, and some are Text.
class Unescaped s where
toString :: s -> String
instance Unescaped String where
toString = id
instance Unescaped Text where
toString = T.unpack
instance Unescaped InterfaceName where
toString = formatInterfaceName
instance Unescaped ObjectPath where
toString = formatObjectPath
instance Unescaped MemberName where
toString = formatMemberName
escape :: Unescaped s => s -> Markup
escape = Markup . escapeMarkup . toString
formatMember :: Maybe InterfaceName -> MemberName -> Markup
formatMember iface member = iface' `mappend` b (escape member)
where
iface' = case iface of
Just ifaceName -> escape ifaceName `mappend` Markup "."
Nothing -> light (escape "(no interface) ")
|
