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|
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.Writers.Muse
Copyright : Copyright (C) 2017-2019 Alexander Krotov
License : GNU GPL, version 2 or above
Maintainer : Alexander Krotov <ilabdsf@gmail.com>
Stability : stable
Portability : portable
Conversion of 'Pandoc' documents to Muse.
This module is mostly intended for <https://amusewiki.org/ Amusewiki> markup support,
as described by <https://amusewiki.org/library/manual Text::Amuse markup manual>.
Original <https://www.gnu.org/software/emacs-muse/ Emacs Muse> markup support
is a secondary goal.
Where Text::Amuse markup
<https://metacpan.org/pod/Text::Amuse#DIFFERENCES-WITH-THE-ORIGINAL-EMACS-MUSE-MARKUP differs>
from <https://www.gnu.org/software/emacs-muse/manual/ Emacs Muse markup>,
Text::Amuse markup is supported.
For example, native tables are always used instead of Org Mode tables.
However, @\<literal style="html">@ tag is used for HTML raw blocks
even though it is supported only in Emacs Muse.
-}
module Text.Pandoc.Writers.Muse (writeMuse) where
import Prelude
import Control.Monad.Reader
import Control.Monad.State.Strict
import Data.Char (isAlphaNum, isAsciiLower, isAsciiUpper, isDigit, isSpace)
import Data.Default
import Data.List (intersperse, isInfixOf, transpose)
import qualified Data.Set as Set
import Data.Text (Text)
import System.FilePath (takeExtension)
import Text.Pandoc.Class (PandocMonad)
import Text.Pandoc.Definition
import Text.Pandoc.ImageSize
import Text.Pandoc.Options
import Text.Pandoc.Pretty
import Text.Pandoc.Shared
import Text.Pandoc.Templates (renderTemplate')
import Text.Pandoc.Writers.Math
import Text.Pandoc.Writers.Shared
type Notes = [[Block]]
type Muse m = ReaderT WriterEnv (StateT WriterState m)
data WriterEnv =
WriterEnv { envOptions :: WriterOptions
, envTopLevel :: Bool
, envInsideBlock :: Bool
, envInlineStart :: Bool -- ^ True if there is only whitespace since last newline
, envInsideLinkDescription :: Bool -- ^ Escape ] if True
, envAfterSpace :: Bool -- ^ There is whitespace (not just newline) before
, envOneLine :: Bool -- ^ True if newlines are not allowed
, envInsideAsterisks :: Bool -- ^ True if outer element is emphasis with asterisks
, envNearAsterisks :: Bool -- ^ Rendering inline near asterisks
}
data WriterState =
WriterState { stNotes :: Notes
, stNoteNum :: Int
, stIds :: Set.Set String
, stUseTags :: Bool -- ^ Use tags for emphasis, for example because previous character is a letter
}
instance Default WriterState
where def = WriterState { stNotes = []
, stNoteNum = 1
, stIds = Set.empty
, stUseTags = False
}
evalMuse :: PandocMonad m => Muse m a -> WriterEnv -> WriterState -> m a
evalMuse document env = evalStateT $ runReaderT document env
-- | Convert Pandoc to Muse.
writeMuse :: PandocMonad m
=> WriterOptions
-> Pandoc
-> m Text
writeMuse opts document =
evalMuse (pandocToMuse document) env def
where env = WriterEnv { envOptions = opts
, envTopLevel = True
, envInsideBlock = False
, envInlineStart = True
, envInsideLinkDescription = False
, envAfterSpace = False
, envOneLine = False
, envInsideAsterisks = False
, envNearAsterisks = False
}
-- | Return Muse representation of document.
pandocToMuse :: PandocMonad m
=> Pandoc
-> Muse m Text
pandocToMuse (Pandoc meta blocks) = do
opts <- asks envOptions
let colwidth = if writerWrapText opts == WrapAuto
then Just $ writerColumns opts
else Nothing
let render' :: Doc -> Text
render' = render Nothing
metadata <- metaToJSON opts
(fmap render' . blockListToMuse)
(fmap render' . inlineListToMuse)
meta
body <- blockListToMuse blocks
notes <- currentNotesToMuse
let main = render colwidth $ body $+$ notes
let context = defField "body" main metadata
case writerTemplate opts of
Nothing -> return main
Just tpl -> renderTemplate' tpl context
-- | Helper function for flatBlockListToMuse
-- | Render all blocks and insert blank lines between the first two
catWithBlankLines :: PandocMonad m
=> [Block] -- ^ List of block elements
-> Int -- ^ Number of blank lines
-> Muse m Doc
catWithBlankLines (b : bs) n = do
b' <- blockToMuseWithNotes b
bs' <- flatBlockListToMuse bs
return $ b' <> blanklines n <> bs'
catWithBlankLines _ _ = error "Expected at least one block"
-- | Convert list of Pandoc block elements to Muse
-- | without setting envTopLevel.
flatBlockListToMuse :: PandocMonad m
=> [Block] -- ^ List of block elements
-> Muse m Doc
flatBlockListToMuse bs@(BulletList _ : BulletList _ : _) = catWithBlankLines bs 2
flatBlockListToMuse bs@(OrderedList (_, style1, _) _ : OrderedList (_, style2, _) _ : _) =
catWithBlankLines bs (if style1' == style2' then 2 else 0)
where
style1' = normalizeStyle style1
style2' = normalizeStyle style2
normalizeStyle DefaultStyle = Decimal
normalizeStyle s = s
flatBlockListToMuse bs@(DefinitionList _ : DefinitionList _ : _) = catWithBlankLines bs 2
flatBlockListToMuse bs@(_ : _) = catWithBlankLines bs 0
flatBlockListToMuse [] = return mempty
simpleTable :: PandocMonad m
=> [Inline]
-> [TableCell]
-> [[TableCell]]
-> Muse m Doc
simpleTable caption headers rows = do
topLevel <- asks envTopLevel
caption' <- inlineListToMuse caption
headers' <- mapM blockListToMuse headers
rows' <- mapM (mapM blockListToMuse) rows
let widthsInChars = maximum . map offset <$> transpose (headers' : rows')
let hpipeBlocks sep blocks = hcat $ intersperse sep' blocks
where sep' = lblock (length sep) $ text sep
let makeRow sep = hpipeBlocks sep . zipWith lblock widthsInChars
let head' = makeRow " || " headers'
rows'' <- mapM (\row -> makeRow rowSeparator <$> mapM blockListToMuse row) rows
let body = vcat rows''
return $ (if topLevel then nest 1 else id) ((if noHeaders then empty else head')
$$ body
$$ (if null caption then empty else "|+ " <> caption' <> " +|"))
$$ blankline
where noHeaders = all null headers
rowSeparator = if noHeaders then " | " else " | "
-- | Convert list of Pandoc block elements to Muse.
blockListToMuse :: PandocMonad m
=> [Block] -- ^ List of block elements
-> Muse m Doc
blockListToMuse =
local (\env -> env { envTopLevel = not (envInsideBlock env)
, envInsideBlock = True
}) . flatBlockListToMuse
-- | Convert Pandoc block element to Muse.
blockToMuse :: PandocMonad m
=> Block -- ^ Block element
-> Muse m Doc
blockToMuse (Plain inlines) = inlineListToMuse' inlines
blockToMuse (Para inlines) = do
contents <- inlineListToMuse' inlines
return $ contents <> blankline
blockToMuse (LineBlock lns) = do
lns' <- local (\env -> env { envOneLine = True }) $ mapM inlineListToMuse lns
return $ nowrap $ vcat (map (text "> " <>) lns') <> blankline
blockToMuse (CodeBlock (_,_,_) str) =
return $ "<example>" $$ text str $$ "</example>" $$ blankline
blockToMuse (RawBlock (Format format) str) =
return $ blankline $$ "<literal style=\"" <> text format <> "\">" $$
text str $$ "</literal>" $$ blankline
blockToMuse (BlockQuote blocks) = do
contents <- flatBlockListToMuse blocks
return $ blankline
<> "<quote>"
$$ nest 0 contents -- nest 0 to remove trailing blank lines
$$ "</quote>"
<> blankline
blockToMuse (OrderedList (start, style, _) items) = do
let markers = take (length items) $ orderedListMarkers
(start, style, Period)
contents <- zipWithM orderedListItemToMuse markers items
topLevel <- asks envTopLevel
return $ (if topLevel then nest 1 else id) (vcat contents) $$ blankline
where orderedListItemToMuse :: PandocMonad m
=> String -- ^ marker for list item
-> [Block] -- ^ list item (list of blocks)
-> Muse m Doc
orderedListItemToMuse marker item = hang (length marker + 1) (text marker <> space)
<$> blockListToMuse item
blockToMuse (BulletList items) = do
contents <- mapM bulletListItemToMuse items
topLevel <- asks envTopLevel
return $ (if topLevel then nest 1 else id) (vcat contents) $$ blankline
where bulletListItemToMuse :: PandocMonad m
=> [Block]
-> Muse m Doc
bulletListItemToMuse item = do
modify $ \st -> st { stUseTags = False }
hang 2 "- " <$> blockListToMuse item
blockToMuse (DefinitionList items) = do
contents <- mapM definitionListItemToMuse items
topLevel <- asks envTopLevel
return $ (if topLevel then nest 1 else id) (vcat contents) $$ blankline
where definitionListItemToMuse :: PandocMonad m
=> ([Inline], [[Block]])
-> Muse m Doc
definitionListItemToMuse (label, defs) = do
modify $ \st -> st { stUseTags = False }
label' <- local (\env -> env { envOneLine = True, envAfterSpace = True }) $ inlineListToMuse' label
let ind = offset' label' -- using Text.Pandoc.Pretty.offset results in round trip failures
hang ind (nowrap label') . vcat <$> mapM descriptionToMuse defs
where offset' d = maximum (0: map length (lines $ render Nothing d))
descriptionToMuse :: PandocMonad m
=> [Block]
-> Muse m Doc
descriptionToMuse desc = hang 4 " :: " <$> blockListToMuse desc
blockToMuse (Header level (ident,_,_) inlines) = do
opts <- asks envOptions
topLevel <- asks envTopLevel
contents <- local (\env -> env { envOneLine = True }) $ inlineListToMuse' inlines
ids <- gets stIds
let autoId = uniqueIdent (writerExtensions opts) inlines ids
modify $ \st -> st{ stIds = Set.insert autoId ids }
let attr' = if null ident || (isEnabled Ext_auto_identifiers opts && ident == autoId)
then empty
else "#" <> text ident <> cr
let header' = if topLevel then text (replicate level '*') <> space else mempty
return $ blankline <> attr' $$ nowrap (header' <> contents) <> blankline
-- https://www.gnu.org/software/emacs-muse/manual/muse.html#Horizontal-Rules-and-Anchors
blockToMuse HorizontalRule = return $ blankline $$ "----" $$ blankline
blockToMuse (Table caption aligns widths headers rows) =
if isSimple && numcols > 1
then simpleTable caption headers rows
else do
opts <- asks envOptions
gridTable opts blocksToDoc True (map (const AlignDefault) aligns) widths headers rows
where
blocksToDoc opts blocks =
local (\env -> env { envOptions = opts }) $ blockListToMuse blocks
numcols = maximum (length aligns : length widths : map length (headers:rows))
isSimple = onlySimpleTableCells (headers:rows) && all (== 0) widths
blockToMuse (Div _ bs) = flatBlockListToMuse bs
blockToMuse Null = return empty
-- | Return Muse representation of notes collected so far.
currentNotesToMuse :: PandocMonad m
=> Muse m Doc
currentNotesToMuse = do
notes <- reverse <$> gets stNotes
modify $ \st -> st { stNotes = mempty }
notesToMuse notes
-- | Return Muse representation of notes.
notesToMuse :: PandocMonad m
=> Notes
-> Muse m Doc
notesToMuse notes = do
n <- gets stNoteNum
modify $ \st -> st { stNoteNum = stNoteNum st + length notes }
vsep <$> zipWithM noteToMuse [n ..] notes
-- | Return Muse representation of a note.
noteToMuse :: PandocMonad m
=> Int
-> [Block]
-> Muse m Doc
noteToMuse num note = do
res <- hang (length marker) (text marker) <$>
local (\env -> env { envInsideBlock = True
, envInlineStart = True
, envAfterSpace = True
}) (blockListToMuse note)
return $ res <> blankline
where
marker = "[" ++ show num ++ "] "
-- | Return Muse representation of block and accumulated notes.
blockToMuseWithNotes :: PandocMonad m
=> Block
-> Muse m Doc
blockToMuseWithNotes blk = do
topLevel <- asks envTopLevel
opts <- asks envOptions
let hdrToMuse hdr@Header{} = do
b <- blockToMuse hdr
if topLevel && writerReferenceLocation opts == EndOfSection
then do
notes <- currentNotesToMuse
return $ notes $+$ b
else
return b
hdrToMuse b = blockToMuse b
b <- hdrToMuse blk
if topLevel && writerReferenceLocation opts == EndOfBlock
then do
notes <- currentNotesToMuse
return $ b $+$ notes <> blankline
else return b
-- | Escape special characters for Muse.
escapeString :: String -> String
escapeString s =
"<verbatim>" ++
substitute "</verbatim>" "<</verbatim><verbatim>/verbatim>" s ++
"</verbatim>"
-- | Replace newlines with spaces
replaceNewlines :: String -> String
replaceNewlines ('\n':xs) = ' ':replaceNewlines xs
replaceNewlines (x:xs) = x:replaceNewlines xs
replaceNewlines [] = []
startsWithMarker :: (Char -> Bool) -> String -> Bool
startsWithMarker f (' ':xs) = startsWithMarker f xs
startsWithMarker f (x:xs) =
f x && (startsWithMarker f xs || startsWithDot xs)
where
startsWithDot ['.'] = True
startsWithDot ('.':c:_) = isSpace c
startsWithDot _ = False
startsWithMarker _ [] = False
containsNotes :: Char -> Char -> String -> Bool
containsNotes left right = p
where p (left':xs)
| left' == left = q xs || p xs
| otherwise = p xs
p "" = False
q (x:xs)
| x `elem` ("123456789"::String) = r xs || p xs
| otherwise = p xs
q [] = False
r ('0':xs) = r xs || p xs
r xs = s xs || q xs || p xs
s (right':xs)
| right' == right = True
| otherwise = p xs
s [] = False
-- | Return True if string should be escaped with <verbatim> tags
shouldEscapeString :: PandocMonad m
=> String
-> Muse m Bool
shouldEscapeString s = do
insideLink <- asks envInsideLinkDescription
return $ null s ||
any (`elem` ("#*<=|" :: String)) s ||
"::" `isInfixOf` s ||
"~~" `isInfixOf` s ||
"[[" `isInfixOf` s ||
">>>" `isInfixOf` s ||
("]" `isInfixOf` s && insideLink) ||
containsNotes '[' ']' s ||
containsNotes '{' '}' s
-- | Escape special characters for Muse if needed.
conditionalEscapeString :: PandocMonad m
=> String
-> Muse m String
conditionalEscapeString s = do
shouldEscape <- shouldEscapeString s
return $ if shouldEscape
then escapeString s
else s
-- Expand Math and Cite before normalizing inline list
preprocessInlineList :: PandocMonad m
=> [Inline]
-> m [Inline]
preprocessInlineList (Math t str:xs) = (++) <$> texMathToInlines t str <*> preprocessInlineList xs
-- Amusewiki does not support <cite> tag,
-- and Emacs Muse citation support is limited
-- (https://www.gnu.org/software/emacs-muse/manual/html_node/Citations.html#Citation)
-- so just fallback to expanding inlines.
preprocessInlineList (Cite _ lst:xs) = (lst ++) <$> preprocessInlineList xs
preprocessInlineList (x:xs) = (x:) <$> preprocessInlineList xs
preprocessInlineList [] = return []
replaceSmallCaps :: Inline -> Inline
replaceSmallCaps (SmallCaps lst) = Emph lst
replaceSmallCaps x = x
removeKeyValues :: Inline -> Inline
removeKeyValues (Code (i, cls, _) xs) = Code (i, cls, []) xs
-- Do not remove attributes from Link
-- Do not remove attributes, such as "width", from Image
-- Do not remove attributes, such as "dir", from Span
removeKeyValues x = x
normalizeInlineList :: [Inline] -> [Inline]
normalizeInlineList (Str "" : xs)
= normalizeInlineList xs
normalizeInlineList (x : Str "" : xs)
= normalizeInlineList (x:xs)
normalizeInlineList (Str x1 : Str x2 : xs)
= normalizeInlineList $ Str (x1 ++ x2) : xs
normalizeInlineList (Emph x1 : Emph x2 : ils)
= normalizeInlineList $ Emph (x1 ++ x2) : ils
normalizeInlineList (Strong x1 : Strong x2 : ils)
= normalizeInlineList $ Strong (x1 ++ x2) : ils
normalizeInlineList (Strikeout x1 : Strikeout x2 : ils)
= normalizeInlineList $ Strikeout (x1 ++ x2) : ils
normalizeInlineList (Superscript x1 : Superscript x2 : ils)
= normalizeInlineList $ Superscript (x1 ++ x2) : ils
normalizeInlineList (Subscript x1 : Subscript x2 : ils)
= normalizeInlineList $ Subscript (x1 ++ x2) : ils
normalizeInlineList (SmallCaps x1 : SmallCaps x2 : ils)
= normalizeInlineList $ SmallCaps (x1 ++ x2) : ils
normalizeInlineList (Code _ x1 : Code _ x2 : ils)
= normalizeInlineList $ Code nullAttr (x1 ++ x2) : ils
normalizeInlineList (RawInline f1 x1 : RawInline f2 x2 : ils) | f1 == f2
= normalizeInlineList $ RawInline f1 (x1 ++ x2) : ils
-- Do not join Span's during normalization
normalizeInlineList (x:xs) = x : normalizeInlineList xs
normalizeInlineList [] = []
fixNotes :: [Inline] -> [Inline]
fixNotes [] = []
fixNotes (Space : n@Note{} : rest) = Str " " : n : fixNotes rest
fixNotes (SoftBreak : n@Note{} : rest) = Str " " : n : fixNotes rest
fixNotes (x:xs) = x : fixNotes xs
startsWithSpace :: [Inline] -> Bool
startsWithSpace (Space:_) = True
startsWithSpace (SoftBreak:_) = True
startsWithSpace (Str s:_) = stringStartsWithSpace s
startsWithSpace _ = False
endsWithSpace :: [Inline] -> Bool
endsWithSpace [Space] = True
endsWithSpace [SoftBreak] = True
endsWithSpace [Str s] = stringStartsWithSpace $ reverse s
endsWithSpace (_:xs) = endsWithSpace xs
endsWithSpace [] = False
urlEscapeBrackets :: String -> String
urlEscapeBrackets (']':xs) = '%':'5':'D':urlEscapeBrackets xs
urlEscapeBrackets (x:xs) = x:urlEscapeBrackets xs
urlEscapeBrackets [] = []
isHorizontalRule :: String -> Bool
isHorizontalRule s = length s >= 4 && all (== '-') s
stringStartsWithSpace :: String -> Bool
stringStartsWithSpace (x:_) = isSpace x
stringStartsWithSpace "" = False
fixOrEscape :: Bool -> Inline -> Bool
fixOrEscape sp (Str "-") = sp
fixOrEscape sp (Str s@('-':x:_)) = (sp && isSpace x) || isHorizontalRule s
fixOrEscape sp (Str ";") = not sp
fixOrEscape sp (Str (';':x:_)) = not sp && isSpace x
fixOrEscape _ (Str ">") = True
fixOrEscape _ (Str ('>':x:_)) = isSpace x
fixOrEscape sp (Str s) = (sp && (startsWithMarker isDigit s ||
startsWithMarker isAsciiLower s ||
startsWithMarker isAsciiUpper s))
|| stringStartsWithSpace s
fixOrEscape _ Space = True
fixOrEscape _ SoftBreak = True
fixOrEscape _ _ = False
inlineListStartsWithAlnum :: PandocMonad m
=> [Inline]
-> Muse m Bool
inlineListStartsWithAlnum (Str s:_) = do
esc <- shouldEscapeString s
return $ esc || isAlphaNum (head s)
inlineListStartsWithAlnum _ = return False
-- | Convert list of Pandoc inline elements to Muse
renderInlineList :: PandocMonad m
=> [Inline]
-> Muse m Doc
renderInlineList [] = pure ""
renderInlineList (x:xs) = do
start <- asks envInlineStart
afterSpace <- asks envAfterSpace
topLevel <- asks envTopLevel
insideAsterisks <- asks envInsideAsterisks
nearAsterisks <- asks envNearAsterisks
useTags <- gets stUseTags
alnumNext <- inlineListStartsWithAlnum xs
let newUseTags = useTags || alnumNext
modify $ \st -> st { stUseTags = newUseTags }
r <- local (\env -> env { envInlineStart = False
, envInsideAsterisks = False
, envNearAsterisks = nearAsterisks || (null xs && insideAsterisks)
}) $ inlineToMuse x
opts <- asks envOptions
let isNewline = (x == SoftBreak && writerWrapText opts == WrapPreserve) || x == LineBreak
lst' <- local (\env -> env { envInlineStart = isNewline
, envAfterSpace = x == Space || (not topLevel && isNewline)
, envNearAsterisks = False
}) $ renderInlineList xs
if start && fixOrEscape afterSpace x
then pure (text "<verbatim></verbatim>" <> r <> lst')
else pure (r <> lst')
-- | Normalize and convert list of Pandoc inline elements to Muse.
inlineListToMuse :: PandocMonad m
=> [Inline]
-> Muse m Doc
inlineListToMuse lst = do
lst' <- normalizeInlineList . fixNotes <$> preprocessInlineList (map (removeKeyValues . replaceSmallCaps) lst)
insideAsterisks <- asks envInsideAsterisks
start <- asks envInlineStart
modify $ \st -> st { stUseTags = False } -- Previous character is likely a '>' or some other markup
if start && null lst'
then pure "<verbatim></verbatim>"
else local (\env -> env { envNearAsterisks = insideAsterisks }) $ renderInlineList lst'
inlineListToMuse' :: PandocMonad m => [Inline] -> Muse m Doc
inlineListToMuse' lst = do
topLevel <- asks envTopLevel
afterSpace <- asks envAfterSpace
local (\env -> env { envInlineStart = True
, envAfterSpace = afterSpace || not topLevel
}) $ inlineListToMuse lst
emphasis :: PandocMonad m => String -> String -> [Inline] -> Muse m Doc
emphasis b e lst = do
contents <- local (\env -> env { envInsideAsterisks = inAsterisks }) $ inlineListToMuse lst
modify $ \st -> st { stUseTags = useTags }
return $ text b <> contents <> text e
where inAsterisks = last b == '*' || head e == '*'
useTags = last e /= '>'
-- | Convert Pandoc inline element to Muse.
inlineToMuse :: PandocMonad m
=> Inline
-> Muse m Doc
inlineToMuse (Str str) = do
escapedStr <- conditionalEscapeString $ replaceNewlines str
let useTags = isAlphaNum $ last escapedStr -- escapedStr is never empty because empty strings are escaped
modify $ \st -> st { stUseTags = useTags }
return $ text escapedStr
inlineToMuse (Emph [Strong lst]) = do
useTags <- gets stUseTags
let lst' = normalizeInlineList lst
if useTags
then emphasis "<em>**" "**</em>" lst'
else if null lst' || startsWithSpace lst' || endsWithSpace lst'
then emphasis "*<strong>" "</strong>*" lst'
else emphasis "***" "***" lst'
inlineToMuse (Emph lst) = do
useTags <- gets stUseTags
let lst' = normalizeInlineList lst
if useTags || null lst' || startsWithSpace lst' || endsWithSpace lst'
then emphasis "<em>" "</em>" lst'
else emphasis "*" "*" lst'
inlineToMuse (Strong [Emph lst]) = do
useTags <- gets stUseTags
let lst' = normalizeInlineList lst
if useTags
then emphasis "<strong>*" "*</strong>" lst'
else if null lst' || startsWithSpace lst' || endsWithSpace lst'
then emphasis "**<em>" "</em>**" lst'
else emphasis "***" "***" lst'
inlineToMuse (Strong lst) = do
useTags <- gets stUseTags
let lst' = normalizeInlineList lst
if useTags || null lst' || startsWithSpace lst' || endsWithSpace lst'
then emphasis "<strong>" "</strong>" lst'
else emphasis "**" "**" lst'
inlineToMuse (Strikeout lst) = do
contents <- inlineListToMuse lst
modify $ \st -> st { stUseTags = False }
return $ "<del>" <> contents <> "</del>"
inlineToMuse (Superscript lst) = do
contents <- inlineListToMuse lst
modify $ \st -> st { stUseTags = False }
return $ "<sup>" <> contents <> "</sup>"
inlineToMuse (Subscript lst) = do
contents <- inlineListToMuse lst
modify $ \st -> st { stUseTags = False }
return $ "<sub>" <> contents <> "</sub>"
inlineToMuse SmallCaps {} =
fail "SmallCaps should be expanded before normalization"
inlineToMuse (Quoted SingleQuote lst) = do
contents <- inlineListToMuse lst
modify $ \st -> st { stUseTags = False }
return $ "‘" <> contents <> "’"
inlineToMuse (Quoted DoubleQuote lst) = do
contents <- inlineListToMuse lst
modify $ \st -> st { stUseTags = False }
return $ "“" <> contents <> "”"
inlineToMuse Cite {} =
fail "Citations should be expanded before normalization"
inlineToMuse (Code _ str) = do
useTags <- gets stUseTags
modify $ \st -> st { stUseTags = False }
return $ if useTags || null str || '=' `elem` str || isSpace (head str) || isSpace (last str)
then "<code>" <> text (substitute "</code>" "<</code><code>/code>" str) <> "</code>"
else "=" <> text str <> "="
inlineToMuse Math{} =
fail "Math should be expanded before normalization"
inlineToMuse (RawInline (Format f) str) = do
modify $ \st -> st { stUseTags = False }
return $ "<literal style=\"" <> text f <> "\">" <> text str <> "</literal>"
inlineToMuse LineBreak = do
oneline <- asks envOneLine
modify $ \st -> st { stUseTags = False }
return $ if oneline then "<br>" else "<br>" <> cr
inlineToMuse Space = do
modify $ \st -> st { stUseTags = False }
return space
inlineToMuse SoftBreak = do
oneline <- asks envOneLine
wrapText <- asks $ writerWrapText . envOptions
modify $ \st -> st { stUseTags = False }
return $ if not oneline && wrapText == WrapPreserve then cr else space
inlineToMuse (Link _ txt (src, _)) =
case txt of
[Str x] | escapeURI x == src -> do
modify $ \st -> st { stUseTags = False }
return $ "[[" <> text (escapeLink x) <> "]]"
_ -> do contents <- local (\env -> env { envInsideLinkDescription = True }) $ inlineListToMuse txt
modify $ \st -> st { stUseTags = False }
return $ "[[" <> text (escapeLink src) <> "][" <> contents <> "]]"
where escapeLink lnk = if isImageUrl lnk then "URL:" ++ urlEscapeBrackets lnk else urlEscapeBrackets lnk
-- Taken from muse-image-regexp defined in Emacs Muse file lisp/muse-regexps.el
imageExtensions = [".eps", ".gif", ".jpg", ".jpeg", ".pbm", ".png", ".tiff", ".xbm", ".xpm"]
isImageUrl = (`elem` imageExtensions) . takeExtension
inlineToMuse (Image attr alt (source,'f':'i':'g':':':title)) =
inlineToMuse (Image attr alt (source,title))
inlineToMuse (Image attr@(_, classes, _) inlines (source, title)) = do
opts <- asks envOptions
alt <- local (\env -> env { envInsideLinkDescription = True }) $ inlineListToMuse inlines
title' <- if null title
then if null inlines
then return ""
else return $ "[" <> alt <> "]"
else do s <- local (\env -> env { envInsideLinkDescription = True }) $ conditionalEscapeString title
return $ "[" <> text s <> "]"
let width = case dimension Width attr of
Just (Percent x) | isEnabled Ext_amuse opts -> " " ++ show (round x :: Integer)
_ -> ""
let leftalign = if "align-left" `elem` classes
then " l"
else ""
let rightalign = if "align-right" `elem` classes
then " r"
else ""
modify $ \st -> st { stUseTags = False }
return $ "[[" <> text (urlEscapeBrackets source ++ width ++ leftalign ++ rightalign) <> "]" <> title' <> "]"
inlineToMuse (Note contents) = do
-- add to notes in state
notes <- gets stNotes
modify $ \st -> st { stNotes = contents:notes
, stUseTags = False
}
n <- gets stNoteNum
let ref = show $ n + length notes
return $ "[" <> text ref <> "]"
inlineToMuse (Span (anchor,names,kvs) inlines) = do
contents <- inlineListToMuse inlines
let (contents', hasDir) = case lookup "dir" kvs of
Just "rtl" -> ("<<<" <> contents <> ">>>", True)
Just "ltr" -> (">>>" <> contents <> "<<<", True)
_ -> (contents, False)
let anchorDoc = if null anchor
then mempty
else text ('#':anchor) <> space
modify $ \st -> st { stUseTags = False }
return $ anchorDoc <> (if null inlines && not (null anchor)
then mempty
else (if null names then (if hasDir then contents' else "<class>" <> contents' <> "</class>")
else "<class name=\"" <> text (head names) <> "\">" <> contents' <> "</class>"))
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