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
|
{-
Copyright (C) 2006 John MacFarlane <jgm at berkeley dot 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.Docbook
Copyright : Copyright (C) 2006 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm at berkeley dot edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to Docbook XML.
-}
module Text.Pandoc.Writers.Docbook (
writeDocbook
) where
import Text.Pandoc.Definition
import Text.Pandoc.Shared
import Text.Pandoc.Entities ( encodeEntities )
import Text.Regex ( mkRegex, matchRegex )
import Data.Char ( toLower, ord )
import Data.List ( isPrefixOf, partition )
import Text.PrettyPrint.HughesPJ hiding ( Str )
-- | Data structure for defining hierarchical Pandoc documents
data Element = Blk Block
| Sec [Inline] [Element] deriving (Eq, Read, Show)
-- | Returns true on Header block with level at least 'level'
headerAtLeast :: Int -> Block -> Bool
headerAtLeast level (Header x _) = x <= level
headerAtLeast level _ = False
-- | Convert list of Pandoc blocks into list of Elements (hierarchical)
hierarchicalize :: [Block] -> [Element]
hierarchicalize [] = []
hierarchicalize (block:rest) =
case block of
(Header level title) -> let (thisSection, rest') = break (headerAtLeast
level) rest in
(Sec title (hierarchicalize thisSection)):
(hierarchicalize rest')
x -> (Blk x):(hierarchicalize rest)
-- | Convert list of authors to a docbook <author> section
authorToDocbook :: [Char] -> Doc
authorToDocbook name = inTagsIndented "author" $
if ',' `elem` name
then -- last name first
let (lastname, rest) = break (==',') name
firstname = removeLeadingSpace rest in
inTagsSimple "firstname" (text $ stringToSGML firstname) <>
inTagsSimple "surname" (text $ stringToSGML lastname)
else -- last name last
let namewords = words name
lengthname = length namewords
(firstname, lastname) = case lengthname of
0 -> ("","")
1 -> ("", name)
n -> (joinWithSep " " (take (n-1) namewords), last namewords) in
inTagsSimple "firstname" (text $ stringToSGML firstname) $$
inTagsSimple "surname" (text $ stringToSGML lastname)
-- | Convert Pandoc document to string in Docbook format.
writeDocbook :: WriterOptions -> Pandoc -> String
writeDocbook opts (Pandoc (Meta title authors date) blocks) =
let head = if (writerStandalone opts)
then text (writerHeader opts)
else empty
meta = if (writerStandalone opts)
then inTagsIndented "articleinfo" $
(inTagsSimple "title" (wrap opts title)) $$
(vcat (map authorToDocbook authors)) $$
(inTagsSimple "date" (text $ stringToSGML date))
else empty
blocks' = replaceReferenceLinks blocks
(noteBlocks, blocks'') = partition isNoteBlock blocks'
opts' = opts {writerNotes = noteBlocks}
elements = hierarchicalize blocks''
before = writerIncludeBefore opts'
after = writerIncludeAfter opts'
body = (if null before then empty else text before) $$
vcat (map (elementToDocbook opts') elements) $$
(if null after then empty else text after)
body' = if writerStandalone opts'
then inTagsIndented "article" (meta $$ body)
else body in
render $ head $$ body' $$ text ""
-- | Convert an Element to Docbook.
elementToDocbook :: WriterOptions -> Element -> Doc
elementToDocbook opts (Blk block) = blockToDocbook opts block
elementToDocbook opts (Sec title elements) =
-- Docbook doesn't allow sections with no content, so insert some if needed
let elements' = if null elements
then [Blk (Para [])]
else elements in
inTagsIndented "section" $
inTagsSimple "title" (wrap opts title) $$
vcat (map (elementToDocbook opts) elements')
-- | Convert a list of Pandoc blocks to Docbook.
blocksToDocbook :: WriterOptions -> [Block] -> Doc
blocksToDocbook opts = vcat . map (blockToDocbook opts)
-- | Convert a list of lists of blocks to a list of Docbook list items.
listItemsToDocbook :: WriterOptions -> [[Block]] -> Doc
listItemsToDocbook opts items =
vcat $ map (listItemToDocbook opts) items
-- | Convert a list of blocks into a Docbook list item.
listItemToDocbook :: WriterOptions -> [Block] -> Doc
listItemToDocbook opts item =
let plainToPara (Plain x) = Para x
plainToPara y = y in
let item' = map plainToPara item in
inTagsIndented "listitem" (blocksToDocbook opts item')
-- | Convert a Pandoc block element to Docbook.
blockToDocbook :: WriterOptions -> Block -> Doc
blockToDocbook opts Blank = text ""
blockToDocbook opts Null = empty
blockToDocbook opts (Plain lst) = wrap opts lst
blockToDocbook opts (Para lst) =
inTagsIndented "para" (wrap opts lst)
blockToDocbook opts (BlockQuote blocks) =
inTagsIndented "blockquote" (blocksToDocbook opts blocks)
blockToDocbook opts (CodeBlock str) =
text "<screen>\n" <> text (escapeSGML str) <> text "\n</screen>"
blockToDocbook opts (BulletList lst) =
inTagsIndented "itemizedlist" $ listItemsToDocbook opts lst
blockToDocbook opts (OrderedList lst) =
inTagsIndented "orderedlist" $ listItemsToDocbook opts lst
blockToDocbook opts (RawHtml str) = text str -- raw XML block
blockToDocbook opts HorizontalRule = empty -- not semantic
blockToDocbook opts (Note _ _) = empty -- shouldn't occur
blockToDocbook opts (Key _ _) = empty -- shouldn't occur
blockToDocbook opts (Table caption aligns widths headers rows) =
let alignStrings = map alignmentToString aligns
captionDoc = if null caption
then empty
else inTagsIndented "caption"
(inlinesToDocbook opts caption)
tableType = if isEmpty captionDoc then "informaltable" else "table" in
inTagsIndented tableType $ captionDoc $$
(colHeadsToDocbook opts alignStrings widths headers) $$
(vcat $ map (tableRowToDocbook opts alignStrings) rows)
colHeadsToDocbook opts alignStrings widths headers =
let heads = zipWith3
(\align width item -> tableItemToDocbook opts "th" align width item)
alignStrings widths headers in
inTagsIndented "tr" $ vcat heads
alignmentToString alignment = case alignment of
AlignLeft -> "left"
AlignRight -> "right"
AlignCenter -> "center"
AlignDefault -> "left"
tableRowToDocbook opts aligns cols =
inTagsIndented "tr" $ vcat $ zipWith3 (tableItemToDocbook opts "td") aligns (repeat 0) cols
tableItemToDocbook opts tag align width item =
let attrib = [("align", align)] ++
if (width /= 0)
then [("style", "{width: " ++
show (truncate (100*width)) ++ "%;}")]
else [] in
inTags True tag attrib $ vcat $ map (blockToDocbook opts) item
-- | Put string in CDATA section
cdata :: String -> Doc
cdata str = text $ "<![CDATA[" ++ str ++ "]]>"
-- | Take list of inline elements and return wrapped doc.
wrap :: WriterOptions -> [Inline] -> Doc
wrap opts lst = fsep $ map (inlinesToDocbook opts) (splitBy Space lst)
-- | Convert a list of inline elements to Docbook.
inlinesToDocbook :: WriterOptions -> [Inline] -> Doc
inlinesToDocbook opts lst = hcat (map (inlineToDocbook opts) lst)
-- | Convert an inline element to Docbook.
inlineToDocbook :: WriterOptions -> Inline -> Doc
inlineToDocbook opts (Str str) = text $ stringToSGML str
inlineToDocbook opts (Emph lst) =
inTagsSimple "emphasis" (inlinesToDocbook opts lst)
inlineToDocbook opts (Strong lst) =
inTags False "emphasis" [("role", "strong")]
(inlinesToDocbook opts lst)
inlineToDocbook opts (Quoted _ lst) =
inTagsSimple "quote" (inlinesToDocbook opts lst)
inlineToDocbook opts Apostrophe = text "'"
inlineToDocbook opts Ellipses = text "…"
inlineToDocbook opts EmDash = text "—"
inlineToDocbook opts EnDash = text "–"
inlineToDocbook opts (Code str) =
inTagsSimple "literal" $ text (escapeSGML str)
inlineToDocbook opts (TeX str) = inlineToDocbook opts (Code str)
inlineToDocbook opts (HtmlInline str) = empty
inlineToDocbook opts LineBreak =
text $ "<literallayout></literallayout>"
inlineToDocbook opts Space = char ' '
inlineToDocbook opts (Link txt (Src src tit)) =
case (matchRegex (mkRegex "mailto:(.*)") src) of
Just [addr] -> inTagsSimple "email" $ text (escapeSGML addr)
Nothing -> inTags False "ulink" [("url", src)] $
inlinesToDocbook opts txt
inlineToDocbook opts (Link text (Ref ref)) = empty -- shouldn't occur
inlineToDocbook opts (Image alt (Src src tit)) =
let titleDoc = if null tit
then empty
else inTagsIndented "objectinfo" $
inTagsIndented "title"
(text $ stringToSGML tit) in
inTagsIndented "inlinemediaobject" $
inTagsIndented "imageobject" $
titleDoc $$ selfClosingTag "imagedata" [("fileref", src)]
inlineToDocbook opts (Image alternate (Ref ref)) = empty --shouldn't occur
inlineToDocbook opts (NoteRef ref) =
let notes = writerNotes opts
hits = filter (\(Note r _) -> r == ref) notes in
if null hits
then empty
else let (Note _ contents) = head hits in
inTagsIndented "footnote" $ blocksToDocbook opts contents
|
