gdritter repos telml-markup / eb5229b
Working prototype with few tags Getty Ritter 8 years ago
4 changed file(s) with 149 addition(s) and 0 deletion(s). Collapse all Expand all
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Data/TeLML/Markup.hs less more
1 {-# LANGUAGE LambdaCase #-}
2
3 module Data.TeLML.Markup where
4
5 import Control.Monad (void)
6 import Data.TeLML
7 import Text.Blaze.Html
8 import Text.Blaze.Internal (MarkupM)
9 import Text.Blaze.Html5 hiding (map, head, html)
10 import Text.Blaze.Html5.Attributes hiding (name)
11
12 renderWith :: [(String, Renderer)] -> Document -> Either String Html
13 renderWith rs =
14 fmap (void . sequence) . mapM (renderPara (basicTags ++ rs)) . gatherPara
15
16 render :: Document -> Either String Html
17 render = renderWith []
18
19 gatherPara :: Document -> [Document]
20 gatherPara = reverse . map reverse . go [[]]
21 where go rs [] = rs
22 go (r:rs) (t@Tag {}:ts) = go ((t:r):rs) ts
23 go (r:rs) (Text s:ts) = case splitString s of
24 [] -> go (r:rs) ts
25 [x] -> go ((Text x:r):rs) ts
26 xs -> go (map ((:[]) . Text) (tail xs) ++
27 ((Text (head xs):r) : rs)) ts
28 go _ _ = error "[unreachable]"
29
30 splitString :: String -> [String]
31 splitString = filter (/= "") . go
32 where go ('\n':'\n':xs) = "\n":go xs
33 go (x:xs) = let r:rs = go xs in ((x:r):rs)
34 go [] = [""]
35
36 type HtmlE = Either String Html
37
38 type Renderer = (Fragment -> HtmlE, [Document]) -> HtmlE
39
40 basicTags :: [(String, Renderer)]
41 basicTags =
42 [ ("em"
43 , \case (f,[rs]) -> fmap (em . sequence_) (mapM f rs)
44 _ -> Left "wrong arity for em/1"
45 )
46 , ("strong"
47 , \case (f,[rs]) -> fmap (strong . sequence_) (mapM f rs)
48 _ -> Left "wrong arity for strong/1"
49 )
50 , ("link"
51 , \case (f,[[Text l],r]) -> let go h = a ! href (stringValue l) $ h
52 in fmap (go . sequence_) (mapM f r)
53 (_,[_,_]) -> Left "link target should be string"
54 _ -> Left "wrong arity for link/1"
55 )
56 ]
57
58 renderPara :: [(String, Renderer)] -> Document -> Either String Html
59 renderPara taglist ds = fmap (p . sequence_) (mapM go ds)
60 where go (Text ts) = Right (toMarkup ts)
61 go (Tag tx rs) = exec tx rs taglist
62 exec name args ((tag, func):tags)
63 | name == tag = case func (go, args) of
64 Right html -> Right html
65 Left {} -> exec name args tags
66 exec name args (_:tags) = exec name args tags
67 exec name args [] = Left $
68 "Error: no match for tag " ++ name ++ "/" ++ show (length args)
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LICENSE less more
1 Copyright (c) 2015, Getty Ritter
2
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
7
8 * Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 * Redistributions in binary form must reproduce the above
12 copyright notice, this list of conditions and the following
13 disclaimer in the documentation and/or other materials provided
14 with the distribution.
15
16 * Neither the name of Getty Ritter nor the names of other
17 contributors may be used to endorse or promote products derived
18 from this software without specific prior written permission.
19
20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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README.md less more
1 # telml-markup
2
3 TODO: Write description here
4
5 ## Installation
6
7 TODO: Write installation instructions here
8
9 ## Usage
10
11 TODO: Write usage instructions here
12
13 ## How to run tests
14
15 ```
16 cabal configure --enable-tests && cabal build && cabal test
17 ```
18
19 ## Contributing
20
21 TODO: Write contribution instructions here
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telml-markup.cabal less more
1 Name: telml-markup
2 Version: 0.0.0
3 Author: Getty Ritter <gettylefou@gmail.com>
4 Maintainer: Getty Ritter <gettylefou@gmail.com>
5 License: BSD3
6 License-File: LICENSE
7 -- Synopsis:
8 -- Description:
9 Cabal-Version: >= 1.10
10 Build-Type: Simple
11 Extra-Source-Files: README.md, ChangeLog.md
12
13 Library
14 Default-Language: Haskell2010
15 GHC-Options: -Wall
16 Exposed-Modules: Data.TeLML.Markup
17 Build-Depends: base >= 4 && < 5, telml, blaze-markup, blaze-html, mtl
18
19 -- Test-Suite spec
20 -- Type: exitcode-stdio-1.0
21 -- Default-Language: Haskell2010
22 -- Hs-Source-Dirs: test
23 -- Ghc-Options: -Wall
24 -- Main-Is: Spec.hs
25 -- Build-Depends: base
26 -- , hspec
27
28 Source-Repository head
29 Type: git
30 -- Location: