1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
|
{-
Copyright (C) 2007-2010 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
-}
{- |
Module : Text.Pandoc.Writers.Man
Copyright : Copyright (C) 2007-2010 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to groff man page format.
-}
module Text.Pandoc.Writers.Man ( writeMan) where
import Text.Pandoc.Definition
import Text.Pandoc.Templates
import Text.Pandoc.Shared
import Text.Pandoc.Options
import Text.Pandoc.Readers.TeXMath
import Text.Printf ( printf )
import Data.List ( isPrefixOf, intersperse, intercalate )
import Text.Pandoc.Pretty
import Text.Pandoc.Builder (deleteMeta)
import Control.Monad.State
type Notes = [[Block]]
data WriterState = WriterState { stNotes :: Notes
, stHasTables :: Bool }
-- | Convert Pandoc to Man.
writeMan :: WriterOptions -> Pandoc -> String
writeMan opts document = evalState (pandocToMan opts document) (WriterState [] False)
-- | Return groff man representation of document.
pandocToMan :: WriterOptions -> Pandoc -> State WriterState String
pandocToMan opts (Pandoc meta blocks) = do
let colwidth = if writerWrapText opts
then Just $ writerColumns opts
else Nothing
let render' = render colwidth
titleText <- inlineListToMan opts $ docTitle meta
let (cmdName, rest) = break (== ' ') $ render' titleText
let (title', section) = case reverse cmdName of
(')':d:'(':xs) | d `elem` ['0'..'9'] ->
(reverse xs, [d])
xs -> (reverse xs, "\"\"")
let description = hsep $
map (doubleQuotes . text . trim) $ splitBy (== '|') rest
metadata <- metaToJSON
(fmap (render colwidth) . blockListToMan opts)
(fmap (render colwidth) . inlineListToMan opts)
$ deleteMeta "title" meta
body <- blockListToMan opts blocks
notes <- liftM stNotes get
notes' <- notesToMan opts (reverse notes)
let main = render' $ body $$ notes' $$ text ""
hasTables <- liftM stHasTables get
let context = setField "body" main
$ setField "title" title'
$ setField "section" section
$ setField "description" (render' description)
$ setField "has-tables" hasTables
$ foldl (\acc (x,y) -> setField x y acc)
metadata (writerVariables opts)
if writerStandalone opts
then return $ renderTemplate' (writerTemplate opts) context
else return main
-- | Return man representation of notes.
notesToMan :: WriterOptions -> [[Block]] -> State WriterState Doc
notesToMan opts notes =
if null notes
then return empty
else mapM (\(num, note) -> noteToMan opts num note) (zip [1..] notes) >>=
return . (text ".SH NOTES" $$) . vcat
-- | Return man representation of a note.
noteToMan :: WriterOptions -> Int -> [Block] -> State WriterState Doc
noteToMan opts num note = do
contents <- blockListToMan opts note
let marker = cr <> text ".SS " <> brackets (text (show num))
return $ marker $$ contents
-- | Association list of characters to escape.
manEscapes :: [(Char, String)]
manEscapes = [ ('\160', "\\ ")
, ('\'', "\\[aq]")
, ('’', "'")
, ('\x2014', "\\[em]")
, ('\x2013', "\\[en]")
, ('\x2026', "\\&...")
] ++ backslashEscapes "-@\\"
-- | Escape special characters for Man.
escapeString :: String -> String
escapeString = escapeStringUsing manEscapes
-- | Escape a literal (code) section for Man.
escapeCode :: String -> String
escapeCode = concat . intersperse "\n" . map escapeLine . lines where
escapeLine codeline =
case escapeStringUsing (manEscapes ++ backslashEscapes "\t ") codeline of
a@('.':_) -> "\\&" ++ a
b -> b
-- We split inline lists into sentences, and print one sentence per
-- line. groff/troff treats the line-ending period differently.
-- See http://code.google.com/p/pandoc/issues/detail?id=148.
-- | Returns the first sentence in a list of inlines, and the rest.
breakSentence :: [Inline] -> ([Inline], [Inline])
breakSentence [] = ([],[])
breakSentence xs =
let isSentenceEndInline (Str ys@(_:_)) | last ys == '.' = True
isSentenceEndInline (Str ys@(_:_)) | last ys == '?' = True
isSentenceEndInline (LineBreak) = True
isSentenceEndInline _ = False
(as, bs) = break isSentenceEndInline xs
in case bs of
[] -> (as, [])
[c] -> (as ++ [c], [])
(c:Space:cs) -> (as ++ [c], cs)
(Str ".":Str (')':ys):cs) -> (as ++ [Str ".", Str (')':ys)], cs)
(x@(Str ('.':')':_)):cs) -> (as ++ [x], cs)
(LineBreak:x@(Str ('.':_)):cs) -> (as ++[LineBreak], x:cs)
(c:cs) -> (as ++ [c] ++ ds, es)
where (ds, es) = breakSentence cs
-- | Split a list of inlines into sentences.
splitSentences :: [Inline] -> [[Inline]]
splitSentences xs =
let (sent, rest) = breakSentence xs
in if null rest then [sent] else sent : splitSentences rest
-- | Convert Pandoc block element to man.
blockToMan :: WriterOptions -- ^ Options
-> Block -- ^ Block element
-> State WriterState Doc
blockToMan _ Null = return empty
blockToMan opts (Plain inlines) =
liftM vcat $ mapM (inlineListToMan opts) $ splitSentences inlines
blockToMan opts (Para inlines) = do
contents <- liftM vcat $ mapM (inlineListToMan opts) $
splitSentences inlines
return $ text ".PP" $$ contents
blockToMan _ (RawBlock "man" str) = return $ text str
blockToMan _ (RawBlock _ _) = return empty
blockToMan _ HorizontalRule = return $ text ".PP" $$ text " * * * * *"
blockToMan opts (Header level _ inlines) = do
contents <- inlineListToMan opts inlines
let heading = case level of
1 -> ".SH "
_ -> ".SS "
return $ text heading <> contents
blockToMan _ (CodeBlock _ str) = return $
text ".IP" $$
text ".nf" $$
text "\\f[C]" $$
text (escapeCode str) $$
text "\\f[]" $$
text ".fi"
blockToMan opts (BlockQuote blocks) = do
contents <- blockListToMan opts blocks
return $ text ".RS" $$ contents $$ text ".RE"
blockToMan opts (Table caption alignments widths headers rows) =
let aligncode AlignLeft = "l"
aligncode AlignRight = "r"
aligncode AlignCenter = "c"
aligncode AlignDefault = "l"
in do
caption' <- inlineListToMan opts caption
modify $ \st -> st{ stHasTables = True }
let iwidths = if all (== 0) widths
then repeat ""
else map (printf "w(%0.1fn)" . (70 *)) widths
-- 78n default width - 8n indent = 70n
let coldescriptions = text $ intercalate " "
(zipWith (\align width -> aligncode align ++ width)
alignments iwidths) ++ "."
colheadings <- mapM (blockListToMan opts) headers
let makeRow cols = text "T{" $$
(vcat $ intersperse (text "T}@T{") cols) $$
text "T}"
let colheadings' = if all null headers
then empty
else makeRow colheadings $$ char '_'
body <- mapM (\row -> do
cols <- mapM (blockListToMan opts) row
return $ makeRow cols) rows
return $ text ".PP" $$ caption' $$
text ".TS" $$ text "tab(@);" $$ coldescriptions $$
colheadings' $$ vcat body $$ text ".TE"
blockToMan opts (BulletList items) = do
contents <- mapM (bulletListItemToMan opts) items
return (vcat contents)
blockToMan opts (OrderedList attribs items) = do
let markers = take (length items) $ orderedListMarkers attribs
let indent = 1 + (maximum $ map length markers)
contents <- mapM (\(num, item) -> orderedListItemToMan opts num indent item) $
zip markers items
return (vcat contents)
blockToMan opts (DefinitionList items) = do
contents <- mapM (definitionListItemToMan opts) items
return (vcat contents)
-- | Convert bullet list item (list of blocks) to man.
bulletListItemToMan :: WriterOptions -> [Block] -> State WriterState Doc
bulletListItemToMan _ [] = return empty
bulletListItemToMan opts ((Para first):rest) =
bulletListItemToMan opts ((Plain first):rest)
bulletListItemToMan opts ((Plain first):rest) = do
first' <- blockToMan opts (Plain first)
rest' <- blockListToMan opts rest
let first'' = text ".IP \\[bu] 2" $$ first'
let rest'' = if null rest
then empty
else text ".RS 2" $$ rest' $$ text ".RE"
return (first'' $$ rest'')
bulletListItemToMan opts (first:rest) = do
first' <- blockToMan opts first
rest' <- blockListToMan opts rest
return $ text "\\[bu] .RS 2" $$ first' $$ rest' $$ text ".RE"
-- | Convert ordered list item (a list of blocks) to man.
orderedListItemToMan :: WriterOptions -- ^ options
-> String -- ^ order marker for list item
-> Int -- ^ number of spaces to indent
-> [Block] -- ^ list item (list of blocks)
-> State WriterState Doc
orderedListItemToMan _ _ _ [] = return empty
orderedListItemToMan opts num indent ((Para first):rest) =
orderedListItemToMan opts num indent ((Plain first):rest)
orderedListItemToMan opts num indent (first:rest) = do
first' <- blockToMan opts first
rest' <- blockListToMan opts rest
let num' = printf ("%" ++ show (indent - 1) ++ "s") num
let first'' = text (".IP \"" ++ num' ++ "\" " ++ show indent) $$ first'
let rest'' = if null rest
then empty
else text ".RS 4" $$ rest' $$ text ".RE"
return $ first'' $$ rest''
-- | Convert definition list item (label, list of blocks) to man.
definitionListItemToMan :: WriterOptions
-> ([Inline],[[Block]])
-> State WriterState Doc
definitionListItemToMan opts (label, defs) = do
labelText <- inlineListToMan opts label
contents <- if null defs
then return empty
else liftM vcat $ forM defs $ \blocks -> do
let (first, rest) = case blocks of
((Para x):y) -> (Plain x,y)
(x:y) -> (x,y)
[] -> error "blocks is null"
rest' <- liftM vcat $
mapM (\item -> blockToMan opts item) rest
first' <- blockToMan opts first
return $ first' $$ text ".RS" $$ rest' $$ text ".RE"
return $ text ".TP" $$ text ".B " <> labelText $$ contents
-- | Convert list of Pandoc block elements to man.
blockListToMan :: WriterOptions -- ^ Options
-> [Block] -- ^ List of block elements
-> State WriterState Doc
blockListToMan opts blocks =
mapM (blockToMan opts) blocks >>= (return . vcat)
-- | Convert list of Pandoc inline elements to man.
inlineListToMan :: WriterOptions -> [Inline] -> State WriterState Doc
-- if list starts with ., insert a zero-width character \& so it
-- won't be interpreted as markup if it falls at the beginning of a line.
inlineListToMan opts lst@(Str ('.':_) : _) = mapM (inlineToMan opts) lst >>=
(return . (text "\\&" <>) . hcat)
inlineListToMan opts lst = mapM (inlineToMan opts) lst >>= (return . hcat)
-- | Convert Pandoc inline element to man.
inlineToMan :: WriterOptions -> Inline -> State WriterState Doc
inlineToMan opts (Emph lst) = do
contents <- inlineListToMan opts lst
return $ text "\\f[I]" <> contents <> text "\\f[]"
inlineToMan opts (Strong lst) = do
contents <- inlineListToMan opts lst
return $ text "\\f[B]" <> contents <> text "\\f[]"
inlineToMan opts (Strikeout lst) = do
contents <- inlineListToMan opts lst
return $ text "[STRIKEOUT:" <> contents <> char ']'
inlineToMan opts (Superscript lst) = do
contents <- inlineListToMan opts lst
return $ char '^' <> contents <> char '^'
inlineToMan opts (Subscript lst) = do
contents <- inlineListToMan opts lst
return $ char '~' <> contents <> char '~'
inlineToMan opts (SmallCaps lst) = inlineListToMan opts lst -- not supported
inlineToMan opts (Quoted SingleQuote lst) = do
contents <- inlineListToMan opts lst
return $ char '`' <> contents <> char '\''
inlineToMan opts (Quoted DoubleQuote lst) = do
contents <- inlineListToMan opts lst
return $ text "\\[lq]" <> contents <> text "\\[rq]"
inlineToMan opts (Cite _ lst) =
inlineListToMan opts lst
inlineToMan _ (Code _ str) =
return $ text $ "\\f[C]" ++ escapeCode str ++ "\\f[]"
inlineToMan _ (Str str) = return $ text $ escapeString str
inlineToMan opts (Math InlineMath str) = inlineListToMan opts $ readTeXMath str
inlineToMan opts (Math DisplayMath str) = do
contents <- inlineListToMan opts $ readTeXMath str
return $ cr <> text ".RS" $$ contents $$ text ".RE"
inlineToMan _ (RawInline "man" str) = return $ text str
inlineToMan _ (RawInline _ _) = return empty
inlineToMan _ (LineBreak) = return $
cr <> text ".PD 0" $$ text ".P" $$ text ".PD" <> cr
inlineToMan _ Space = return space
inlineToMan opts (Link txt (src, _)) = do
linktext <- inlineListToMan opts txt
let srcSuffix = if isPrefixOf "mailto:" src then drop 7 src else src
return $ case txt of
[Str s]
| escapeURI s == srcSuffix ->
char '<' <> text srcSuffix <> char '>'
_ -> linktext <> text " (" <> text src <> char ')'
inlineToMan opts (Image alternate (source, tit)) = do
let txt = if (null alternate) || (alternate == [Str ""]) ||
(alternate == [Str source]) -- to prevent autolinks
then [Str "image"]
else alternate
linkPart <- inlineToMan opts (Link txt (source, tit))
return $ char '[' <> text "IMAGE: " <> linkPart <> char ']'
inlineToMan _ (Note contents) = do
-- add to notes in state
modify $ \st -> st{ stNotes = contents : stNotes st }
notes <- liftM stNotes get
let ref = show $ (length notes)
return $ char '[' <> text ref <> char ']'
|