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
|
{-
Copyright (C) 2013 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.OPML
Copyright : Copyright (C) 2013 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to OPML XML.
-}
module Text.Pandoc.Writers.OPML ( writeOPML) where
import Text.Pandoc.Definition
import Text.Pandoc.XML
import Text.Pandoc.Shared
import Text.Pandoc.Options
import Text.Pandoc.Templates (renderTemplate)
import Text.Pandoc.Writers.HTML (writeHtmlString)
import Text.Pandoc.Writers.Markdown (writeMarkdown)
import Data.List ( intercalate )
import Text.Pandoc.Pretty
-- | Convert Pandoc document to string in OPML format.
writeOPML :: WriterOptions -> Pandoc -> String
writeOPML opts (Pandoc (Meta tit auths dat) blocks) =
let title = writeHtmlInlines tit
author = writeHtmlInlines $ intercalate [Space,Str ";",Space] auths
date = trim $ writeHtmlInlines dat
elements = hierarchicalize blocks
colwidth = if writerWrapText opts
then Just $ writerColumns opts
else Nothing
render' = render colwidth
main = render' $ vcat (map (elementToOPML opts) elements)
context = writerVariables opts ++
[ ("body", main)
, ("title", title)
, ("date", date)
, ("author", author) ]
in if writerStandalone opts
then renderTemplate context $ writerTemplate opts
else main
writeHtmlInlines :: [Inline] -> String
writeHtmlInlines ils = trim $ writeHtmlString def
$ Pandoc (Meta [] [] []) [Plain ils]
-- | Convert an Element to OPML.
elementToOPML :: WriterOptions -> Element -> Doc
elementToOPML _ (Blk _) = empty
elementToOPML opts (Sec _ _num _ title elements) =
let isBlk (Blk _) = True
isBlk _ = False
fromBlk (Blk x) = x
fromBlk _ = error "fromBlk called on non-block"
(blocks, rest) = span isBlk elements
attrs = [("text", writeHtmlInlines title)] ++
[("_note", writeMarkdown opts (Pandoc (Meta [] [] [])
(map fromBlk blocks)))
| not (null blocks)]
in inTags True "outline" attrs $
vcat (map (elementToOPML opts) rest)
|
