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
|
-----------------------------------------------------------------------------
-- |
-- Module : Haddock.Backends.Html.Util
-- Copyright : (c) Simon Marlow 2003-2006,
-- David Waern 2006-2009,
-- Mark Lentczner 2010
-- License : BSD-like
--
-- Maintainer : haddock@projects.haskell.org
-- Stability : experimental
-- Portability : portable
-----------------------------------------------------------------------------
module Haddock.Backends.Xhtml.Utils (
renderToString,
namedAnchor, linkedAnchor,
spliceURL, spliceURL',
groupId,
(<+>), (<=>), char,
keyword, punctuate,
braces, brackets, pabrackets, parens, parenList, ubxParenList, ubxSumList,
arrow, comma, dcolon, dot, darrow, equals, forallSymbol, quote, promoQuote,
atSign,
hsep, vcat,
DetailsState(..), collapseDetails, thesummary,
collapseToggle, collapseControl,
) where
import Haddock.Utils
import Data.Maybe
import Text.XHtml hiding ( name, title, p, quote )
import qualified Text.XHtml as XHtml
import GHC ( SrcSpan(..), srcSpanStartLine, Name )
import Module ( Module, ModuleName, moduleName, moduleNameString )
import Name ( getOccString, nameOccName, isValOcc )
-- | Replace placeholder string elements with provided values.
--
-- Used to generate URL for customized external paths, usually provided with
-- @--source-module@, @--source-entity@ and related command-line arguments.
--
-- >>> spliceURL Nothing mmod mname Nothing "output/%{MODULE}.hs#%{NAME}"
-- "output/Foo.hs#foo"
spliceURL :: Maybe FilePath -> Maybe Module -> Maybe GHC.Name ->
Maybe SrcSpan -> String -> String
spliceURL mfile mmod = spliceURL' mfile (moduleName <$> mmod)
-- | Same as 'spliceURL' but takes 'ModuleName' instead of 'Module'.
spliceURL' :: Maybe FilePath -> Maybe ModuleName -> Maybe GHC.Name ->
Maybe SrcSpan -> String -> String
spliceURL' maybe_file maybe_mod maybe_name maybe_loc = run
where
file = fromMaybe "" maybe_file
mdl = case maybe_mod of
Nothing -> ""
Just m -> moduleNameString m
(name, kind) =
case maybe_name of
Nothing -> ("","")
Just n | isValOcc (nameOccName n) -> (escapeStr (getOccString n), "v")
| otherwise -> (escapeStr (getOccString n), "t")
line = case maybe_loc of
Nothing -> ""
Just span_ ->
case span_ of
RealSrcSpan span__ ->
show $ srcSpanStartLine span__
UnhelpfulSpan _ -> ""
run "" = ""
run ('%':'M':rest) = mdl ++ run rest
run ('%':'F':rest) = file ++ run rest
run ('%':'N':rest) = name ++ run rest
run ('%':'K':rest) = kind ++ run rest
run ('%':'L':rest) = line ++ run rest
run ('%':'%':rest) = '%' : run rest
run ('%':'{':'M':'O':'D':'U':'L':'E':'}':rest) = mdl ++ run rest
run ('%':'{':'F':'I':'L':'E':'}':rest) = file ++ run rest
run ('%':'{':'N':'A':'M':'E':'}':rest) = name ++ run rest
run ('%':'{':'K':'I':'N':'D':'}':rest) = kind ++ run rest
run ('%':'{':'M':'O':'D':'U':'L':'E':'/':'.':'/':c:'}':rest) =
map (\x -> if x == '.' then c else x) mdl ++ run rest
run ('%':'{':'F':'I':'L':'E':'/':'/':'/':c:'}':rest) =
map (\x -> if x == '/' then c else x) file ++ run rest
run ('%':'{':'L':'I':'N':'E':'}':rest) = line ++ run rest
run (c:rest) = c : run rest
renderToString :: Bool -> Html -> String
renderToString debug html
| debug = renderHtml html
| otherwise = showHtml html
hsep :: [Html] -> Html
hsep [] = noHtml
hsep htmls = foldr1 (<+>) htmls
-- | Concatenate a series of 'Html' values vertically, with linebreaks in between.
vcat :: [Html] -> Html
vcat [] = noHtml
vcat htmls = foldr1 (\a b -> a+++br+++b) htmls
infixr 8 <+>
(<+>) :: Html -> Html -> Html
a <+> b = a +++ sep +++ b
where
sep = if isNoHtml a || isNoHtml b then noHtml else toHtml " "
-- | Join two 'Html' values together with a linebreak in between.
-- Has 'noHtml' as left identity.
infixr 8 <=>
(<=>) :: Html -> Html -> Html
a <=> b = a +++ sep +++ b
where
sep = if isNoHtml a then noHtml else br
keyword :: String -> Html
keyword s = thespan ! [theclass "keyword"] << toHtml s
equals, comma :: Html
equals = char '='
comma = char ','
char :: Char -> Html
char c = toHtml [c]
quote :: Html -> Html
quote h = char '`' +++ h +++ '`'
-- | Promoted type quote (e.g. @'[a, b]@, @'(a, b, c)@).
promoQuote :: Html -> Html
promoQuote h = char '\'' +++ h
parens, brackets, pabrackets, braces :: Html -> Html
parens h = char '(' +++ h +++ char ')'
brackets h = char '[' +++ h +++ char ']'
pabrackets h = toHtml "[:" +++ h +++ toHtml ":]"
braces h = char '{' +++ h +++ char '}'
punctuate :: Html -> [Html] -> [Html]
punctuate _ [] = []
punctuate h (d0:ds) = go d0 ds
where
go d [] = [d]
go d (e:es) = (d +++ h) : go e es
parenList :: [Html] -> Html
parenList = parens . hsep . punctuate comma
ubxParenList :: [Html] -> Html
ubxParenList = ubxparens . hsep . punctuate comma
ubxSumList :: [Html] -> Html
ubxSumList = ubxparens . hsep . punctuate (toHtml " | ")
ubxparens :: Html -> Html
ubxparens h = toHtml "(#" <+> h <+> toHtml "#)"
dcolon, arrow, darrow, forallSymbol, atSign :: Bool -> Html
dcolon unicode = toHtml (if unicode then "∷" else "::")
arrow unicode = toHtml (if unicode then "→" else "->")
darrow unicode = toHtml (if unicode then "⇒" else "=>")
forallSymbol unicode = if unicode then toHtml "∀" else keyword "forall"
atSign unicode = toHtml (if unicode then "@" else "@")
dot :: Html
dot = toHtml "."
-- | Generate a named anchor
namedAnchor :: String -> Html -> Html
namedAnchor n = anchor ! [XHtml.identifier n]
linkedAnchor :: String -> Html -> Html
linkedAnchor n = anchor ! [href ('#':n)]
-- | generate an anchor identifier for a group
groupId :: String -> String
groupId g = makeAnchorId ("g:" ++ g)
--
-- A section of HTML which is collapsible.
--
data DetailsState = DetailsOpen | DetailsClosed
collapseDetails :: String -> DetailsState -> Html -> Html
collapseDetails id_ state = tag "details" ! (identifier id_ : openAttrs)
where openAttrs = case state of { DetailsOpen -> [emptyAttr "open"]; DetailsClosed -> [] }
thesummary :: Html -> Html
thesummary = tag "summary"
-- | Attributes for an area that toggles a collapsed area
collapseToggle :: String -> String -> [HtmlAttr]
collapseToggle id_ classes = [ theclass cs, strAttr "data-details-id" id_ ]
where cs = unwords (words classes ++ ["details-toggle"])
-- | Attributes for an area that toggles a collapsed area,
-- and displays a control.
collapseControl :: String -> String -> [HtmlAttr]
collapseControl id_ classes = collapseToggle id_ cs
where cs = unwords (words classes ++ ["details-toggle-control"])
|
