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
|
{-
Copyright (C) 2015 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.CommonMark
Copyright : Copyright (C) 2015 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to CommonMark.
CommonMark: <http://commonmark.org>
-}
module Text.Pandoc.Writers.CommonMark (writeCommonMark) where
import CMark
import Control.Monad.State.Strict (State, get, modify, runState)
import Data.Foldable (foldrM)
import Data.Text (Text)
import qualified Data.Text as T
import Text.Pandoc.Class (PandocMonad)
import Text.Pandoc.Definition
import Text.Pandoc.Options
import Text.Pandoc.Shared (isTightList, linesToPara)
import Text.Pandoc.Templates (renderTemplate')
import Text.Pandoc.Walk (walkM)
import Text.Pandoc.Writers.HTML (writeHtml5String)
import Text.Pandoc.Writers.Shared
-- | Convert Pandoc to CommonMark.
writeCommonMark :: PandocMonad m => WriterOptions -> Pandoc -> m Text
writeCommonMark opts (Pandoc meta blocks) = do
let (blocks', notes) = runState (walkM processNotes blocks) []
notes' = if null notes
then []
else [OrderedList (1, Decimal, Period) $ reverse notes]
main <- blocksToCommonMark opts (blocks' ++ notes')
metadata <- metaToJSON opts
(blocksToCommonMark opts)
(inlinesToCommonMark opts)
meta
let context = defField "body" main $ metadata
return $ case writerTemplate opts of
Nothing -> main
Just tpl -> renderTemplate' tpl context
processNotes :: Inline -> State [[Block]] Inline
processNotes (Note bs) = do
modify (bs :)
notes <- get
return $ Str $ "[" ++ show (length notes) ++ "]"
processNotes x = return x
node :: NodeType -> [Node] -> Node
node = Node Nothing
blocksToCommonMark :: PandocMonad m => WriterOptions -> [Block] -> m Text
blocksToCommonMark opts bs = do
let cmarkOpts = [optHardBreaks | isEnabled Ext_hard_line_breaks opts]
colwidth = if writerWrapText opts == WrapAuto
then Just $ writerColumns opts
else Nothing
nodes <- blocksToNodes bs
return $
nodeToCommonmark cmarkOpts colwidth $
node DOCUMENT nodes
inlinesToCommonMark :: PandocMonad m => WriterOptions -> [Inline] -> m Text
inlinesToCommonMark opts ils = return $
nodeToCommonmark cmarkOpts colwidth $ node PARAGRAPH (inlinesToNodes ils)
where cmarkOpts = [optHardBreaks | isEnabled Ext_hard_line_breaks opts]
colwidth = if writerWrapText opts == WrapAuto
then Just $ writerColumns opts
else Nothing
blocksToNodes :: PandocMonad m => [Block] -> m [Node]
blocksToNodes = foldrM blockToNodes []
blockToNodes :: PandocMonad m => Block -> [Node] -> m [Node]
blockToNodes (Plain xs) ns = return (node PARAGRAPH (inlinesToNodes xs) : ns)
blockToNodes (Para xs) ns = return (node PARAGRAPH (inlinesToNodes xs) : ns)
blockToNodes (LineBlock lns) ns = blockToNodes (linesToPara lns) ns
blockToNodes (CodeBlock (_,classes,_) xs) ns = return $
(node (CODE_BLOCK (T.pack (unwords classes)) (T.pack xs)) [] : ns)
blockToNodes (RawBlock fmt xs) ns
| fmt == Format "html" = return (node (HTML_BLOCK (T.pack xs)) [] : ns)
| otherwise = return (node (CUSTOM_BLOCK (T.pack xs) (T.empty)) [] : ns)
blockToNodes (BlockQuote bs) ns = do
nodes <- blocksToNodes bs
return (node BLOCK_QUOTE nodes : ns)
blockToNodes (BulletList items) ns = do
nodes <- mapM blocksToNodes items
return (node (LIST ListAttributes{
listType = BULLET_LIST,
listDelim = PERIOD_DELIM,
listTight = isTightList items,
listStart = 1 }) (map (node ITEM) nodes) : ns)
blockToNodes (OrderedList (start, _sty, delim) items) ns = do
nodes <- mapM blocksToNodes items
return (node (LIST ListAttributes{
listType = ORDERED_LIST,
listDelim = case delim of
OneParen -> PAREN_DELIM
TwoParens -> PAREN_DELIM
_ -> PERIOD_DELIM,
listTight = isTightList items,
listStart = start }) (map (node ITEM) nodes) : ns)
blockToNodes HorizontalRule ns = return (node THEMATIC_BREAK [] : ns)
blockToNodes (Header lev _ ils) ns = return (node (HEADING lev) (inlinesToNodes ils) : ns)
blockToNodes (Div _ bs) ns = do
nodes <- blocksToNodes bs
return (nodes ++ ns)
blockToNodes (DefinitionList items) ns = blockToNodes (BulletList items') ns
where items' = map dlToBullet items
dlToBullet (term, ((Para xs : ys) : zs)) =
Para (term ++ [LineBreak] ++ xs) : ys ++ concat zs
dlToBullet (term, ((Plain xs : ys) : zs)) =
Plain (term ++ [LineBreak] ++ xs) : ys ++ concat zs
dlToBullet (term, xs) =
Para term : concat xs
blockToNodes t@(Table _ _ _ _ _) ns = do
s <- writeHtml5String def $! Pandoc nullMeta [t]
return (node (HTML_BLOCK s) [] : ns)
blockToNodes Null ns = return ns
inlinesToNodes :: [Inline] -> [Node]
inlinesToNodes = foldr inlineToNodes []
inlineToNodes :: Inline -> [Node] -> [Node]
inlineToNodes (Str s) = (node (TEXT (T.pack s)) [] :)
inlineToNodes Space = (node (TEXT (T.pack " ")) [] :)
inlineToNodes LineBreak = (node LINEBREAK [] :)
inlineToNodes SoftBreak = (node SOFTBREAK [] :)
inlineToNodes (Emph xs) = (node EMPH (inlinesToNodes xs) :)
inlineToNodes (Strong xs) = (node STRONG (inlinesToNodes xs) :)
inlineToNodes (Strikeout xs) =
((node (HTML_INLINE (T.pack "<s>")) [] : inlinesToNodes xs ++
[node (HTML_INLINE (T.pack "</s>")) []]) ++ )
inlineToNodes (Superscript xs) =
((node (HTML_INLINE (T.pack "<sup>")) [] : inlinesToNodes xs ++
[node (HTML_INLINE (T.pack "</sup>")) []]) ++ )
inlineToNodes (Subscript xs) =
((node (HTML_INLINE (T.pack "<sub>")) [] : inlinesToNodes xs ++
[node (HTML_INLINE (T.pack "</sub>")) []]) ++ )
inlineToNodes (SmallCaps xs) =
((node (HTML_INLINE (T.pack "<span class=\"smallcaps\">")) []
: inlinesToNodes xs ++
[node (HTML_INLINE (T.pack "</span>")) []]) ++ )
inlineToNodes (Link _ ils (url,tit)) =
(node (LINK (T.pack url) (T.pack tit)) (inlinesToNodes ils) :)
inlineToNodes (Image _ ils (url,tit)) =
(node (IMAGE (T.pack url) (T.pack tit)) (inlinesToNodes ils) :)
inlineToNodes (RawInline fmt xs)
| fmt == Format "html" = (node (HTML_INLINE (T.pack xs)) [] :)
| otherwise = (node (CUSTOM_INLINE (T.pack xs) (T.empty)) [] :)
inlineToNodes (Quoted qt ils) =
((node (TEXT start) [] : inlinesToNodes ils ++ [node (TEXT end) []]) ++)
where (start, end) = case qt of
SingleQuote -> (T.pack "‘", T.pack "’")
DoubleQuote -> (T.pack "“", T.pack "”")
inlineToNodes (Code _ str) = (node (CODE (T.pack str)) [] :)
inlineToNodes (Math mt str) =
case mt of
InlineMath ->
(node (HTML_INLINE (T.pack ("\\(" ++ str ++ "\\)"))) [] :)
DisplayMath ->
(node (HTML_INLINE (T.pack ("\\[" ++ str ++ "\\]"))) [] :)
inlineToNodes (Span _ ils) = (inlinesToNodes ils ++)
inlineToNodes (Cite _ ils) = (inlinesToNodes ils ++)
inlineToNodes (Note _) = id -- should not occur
-- we remove Note elements in preprocessing
|
