aboutsummaryrefslogblamecommitdiffhomepage
path: root/src/Util/GenerateHtmlCombinators.hs
blob: 83da65b88c44d35ac3211dc0ddf7afd98c00fb6e (plain) (tree)
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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519






































































































































































































































































































































































































































































































































                                                                                                                                       
-- taken from https://github.com/jaspervdj/blaze-html/blob/2c4513e30ce768517b8d7b7b154d438f55217006/src/Util/GenerateHtmlCombinators.hs

-- Copyright Jasper Van der Jeugt 2010

-- All rights reserved.

-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:

--     * Redistributions of source code must retain the above copyright
--       notice, this list of conditions and the following disclaimer.

--     * Redistributions in binary form must reproduce the above
--       copyright notice, this list of conditions and the following
--       disclaimer in the documentation and/or other materials provided
--       with the distribution.

--     * Neither the name of Jasper Van der Jeugt nor the names of other
--       contributors may be used to endorse or promote products derived
--       from this software without specific prior written permission.

-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
{-# LANGUAGE CPP #-}

#define DO_NOT_EDIT (doNotEdit __FILE__ __LINE__)

-- | Generates code for HTML tags.
--
module Util.GenerateHtmlCombinators where

import Control.Arrow ((&&&))
import Data.List (sort, sortBy, intersperse, intercalate)
import Data.Ord (comparing)
import System.Directory (createDirectoryIfMissing)
import System.FilePath ((</>), (<.>))
import Data.Map (Map)
import qualified Data.Map as M
import Data.Char (toLower)
import qualified Data.Set as S

import Util.Sanitize (sanitize, prelude)

-- | Datatype for an HTML variant.
--
data HtmlVariant = HtmlVariant
    { version     :: [String]
    , docType     :: [String]
    , parents     :: [String]
    , leafs       :: [String]
    , attributes  :: [String]
    , selfClosing :: Bool
    } deriving (Eq)

instance Show HtmlVariant where
    show = map toLower . intercalate "-" . version

-- | Get the full module name for an HTML variant.
--
getModuleName :: HtmlVariant -> String
getModuleName = ("Text.Blaze." ++) . intercalate "." . version

-- | Get the attribute module name for an HTML variant.
--
getAttributeModuleName :: HtmlVariant -> String
getAttributeModuleName = (++ ".Attributes") . getModuleName

-- | Check if a given name causes a name clash.
--
isNameClash :: HtmlVariant -> String -> Bool
isNameClash v t
    -- Both an element and an attribute
    | (t `elem` parents v || t `elem` leafs v) && t `elem` attributes v = True
    -- Already a prelude function
    | sanitize t `S.member` prelude = True
    | otherwise = False

-- | Write an HTML variant.
--
writeHtmlVariant :: HtmlVariant -> IO ()
writeHtmlVariant htmlVariant = do
    -- Make a directory.
    createDirectoryIfMissing True basePath

    let tags =  zip parents' (repeat makeParent)
             ++ zip leafs' (repeat (makeLeaf $ selfClosing htmlVariant))
        sortedTags = sortBy (comparing fst) tags
        appliedTags = map (\(x, f) -> f x) sortedTags

    -- Write the main module.
    writeFile' (basePath <.> "hs") $ removeTrailingNewlines $ unlines
        [ DO_NOT_EDIT
        , "{-# LANGUAGE OverloadedStrings #-}"
        , "-- | This module exports HTML combinators used to create documents."
        , "--"
        , exportList modulName $ "module Text.Blaze.Html"
                               : "docType"
                               : "docTypeHtml"
                               : map (sanitize . fst) sortedTags
        , DO_NOT_EDIT
        , "import Prelude ((>>), (.))"
        , ""
        , "import Text.Blaze"
        , "import Text.Blaze.Internal"
        , "import Text.Blaze.Html"
        , ""
        , makeDocType $ docType htmlVariant
        , makeDocTypeHtml $ docType htmlVariant
        , unlines appliedTags
        ]

    let sortedAttributes = sort attributes'

    -- Write the attribute module.
    writeFile' (basePath </> "Attributes.hs") $ removeTrailingNewlines $ unlines
        [ DO_NOT_EDIT
        , "-- | This module exports combinators that provide you with the"
        , "-- ability to set attributes on HTML elements."
        , "--"
        , "{-# LANGUAGE OverloadedStrings #-}"
        , exportList attributeModuleName $ map sanitize sortedAttributes
        , DO_NOT_EDIT
        , "import Prelude ()"
        , ""
        , "import Text.Blaze.Internal (Attribute, AttributeValue, attribute)"
        , ""
        , unlines (map makeAttribute sortedAttributes)
        ]
  where
    basePath  = "src" </> "Text" </> "Blaze" </> foldl1 (</>) version'
    modulName = getModuleName htmlVariant
    attributeModuleName = getAttributeModuleName htmlVariant
    attributes' = attributes htmlVariant
    parents'    = parents htmlVariant
    leafs'      = leafs htmlVariant
    version'    = version htmlVariant
    removeTrailingNewlines = reverse . drop 2 . reverse
    writeFile' file content = do
        putStrLn ("Generating " ++ file)
        writeFile file content

-- | Create a string, consisting of @x@ spaces, where @x@ is the length of the
-- argument.
--
spaces :: String -> String
spaces = flip replicate ' ' . length

-- | Join blocks of code with a newline in between.
--
unblocks :: [String] -> String
unblocks = unlines . intersperse "\n"

-- | A warning to not edit the generated code.
--
doNotEdit :: FilePath -> Int -> String
doNotEdit fileName lineNumber = init $ unlines
    [ "-- WARNING: The next block of code was automatically generated by"
    , "-- " ++ fileName ++ ":" ++ show lineNumber
    , "--"
    ]

-- | Generate an export list for a Haskell module.
--
exportList :: String   -- ^ Module name.
           -> [String] -- ^ List of functions.
           -> String   -- ^ Resulting string.
exportList _    []            = error "exportList without functions."
exportList name (f:functions) = unlines $
    [ "module " ++ name
    , "    ( " ++ f
    ] ++
    map ("    , " ++) functions ++
    [ "    ) where"]

-- | Generate a function for a doctype.
--
makeDocType :: [String] -> String
makeDocType lines' = unlines
    [ DO_NOT_EDIT
    , "-- | Combinator for the document type. This should be placed at the top"
    , "-- of every HTML page."
    , "--"
    , "-- Example:"
    , "--"
    , "-- > docType"
    , "--"
    , "-- Result:"
    , "--"
    , unlines (map ("-- > " ++) lines') ++ "--"
    , "docType :: Html  -- ^ The document type HTML."
    , "docType = preEscapedText " ++ show (unlines lines')
    , "{-# INLINE docType #-}"
    ]

-- | Generate a function for the HTML tag (including the doctype).
--
makeDocTypeHtml :: [String]  -- ^ The doctype.
                -> String    -- ^ Resulting combinator function.
makeDocTypeHtml lines' = unlines
    [ DO_NOT_EDIT
    , "-- | Combinator for the @\\<html>@ element. This combinator will also"
    , "-- insert the correct doctype."
    , "--"
    , "-- Example:"
    , "--"
    , "-- > docTypeHtml $ span $ toHtml \"foo\""
    , "--"
    , "-- Result:"
    , "--"
    , unlines (map ("-- > " ++) lines') ++ "-- > <html><span>foo</span></html>"
    , "--"
    , "docTypeHtml :: Html  -- ^ Inner HTML."
    , "            -> Html  -- ^ Resulting HTML."
    , "docTypeHtml inner = docType >> html inner"
    , "{-# INLINE docTypeHtml #-}"
    ]

-- | Generate a function for an HTML tag that can be a parent.
--
makeParent :: String -> String
makeParent tag = unlines
    [ DO_NOT_EDIT
    , "-- | Combinator for the @\\<" ++ tag ++ ">@ element."
    , "--"
    , "-- Example:"
    , "--"
    , "-- > " ++ function ++ " $ span $ toHtml \"foo\""
    , "--"
    , "-- Result:"
    , "--"
    , "-- > <" ++ tag ++ "><span>foo</span></" ++ tag ++ ">"
    , "--"
    , function        ++ " :: Html  -- ^ Inner HTML."
    , spaces function ++ " -> Html  -- ^ Resulting HTML."
    , function        ++ " = Parent \"" ++ tag ++ "\" \"<" ++ tag
                      ++ "\" \"</" ++ tag ++ ">\"" ++ modifier
    , "{-# INLINE " ++ function ++ " #-}"
    ]
  where
    function = sanitize tag
    modifier = if tag `elem` ["style", "script"] then " . external" else ""

-- | Generate a function for an HTML tag that must be a leaf.
--
makeLeaf :: Bool    -- ^ Make leaf tags self-closing
         -> String  -- ^ Tag for the combinator
         -> String  -- ^ Combinator code
makeLeaf closing tag = unlines
    [ DO_NOT_EDIT
    , "-- | Combinator for the @\\<" ++ tag ++ " />@ element."
    , "--"
    , "-- Example:"
    , "--"
    , "-- > " ++ function
    , "--"
    , "-- Result:"
    , "--"
    , "-- > <" ++ tag ++ " />"
    , "--"
    , function ++ " :: Html  -- ^ Resulting HTML."
    , function ++ " = Leaf \"" ++ tag ++ "\" \"<" ++ tag ++ "\" " ++ "\""
               ++ (if closing then " /" else "") ++ ">\""
    , "{-# INLINE " ++ function ++ " #-}"
    ]
  where
    function = sanitize tag

-- | Generate a function for an HTML attribute.
--
makeAttribute :: String -> String
makeAttribute name = unlines
    [ DO_NOT_EDIT
    , "-- | Combinator for the @" ++ name ++ "@ attribute."
    , "--"
    , "-- Example:"
    , "--"
    , "-- > div ! " ++ function ++ " \"bar\" $ \"Hello.\""
    , "--"
    , "-- Result:"
    , "--"
    , "-- > <div " ++ name ++ "=\"bar\">Hello.</div>"
    , "--"
    , function        ++ " :: AttributeValue  -- ^ Attribute value."
    , spaces function ++ " -> Attribute       -- ^ Resulting attribute."
    , function        ++ " = attribute \"" ++ name ++ "\" \" "
                      ++ name ++ "=\\\"\""
    , "{-# INLINE " ++ function ++ " #-}"
    ]
  where
    function = sanitize name

-- | HTML 4.01 Strict.
-- A good reference can be found here: http://www.w3schools.com/tags/default.asp
--
html4Strict :: HtmlVariant
html4Strict = HtmlVariant
    { version = ["Html4", "Strict"]
    , docType =
        [ "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\""
        , "    \"http://www.w3.org/TR/html4/strict.dtd\">"
        ]
    , parents =
        [ "a", "abbr", "acronym", "address", "b", "bdo", "big", "blockquote"
        , "body" , "button", "caption", "cite", "code", "colgroup", "dd", "del"
        , "dfn", "div" , "dl", "dt", "em", "fieldset", "form", "h1", "h2", "h3"
        , "h4", "h5", "h6", "head", "html", "i", "ins" , "kbd", "label"
        , "legend", "li", "map", "noscript", "object", "ol", "optgroup"
        , "option", "p", "pre", "q", "samp", "script", "select", "small"
        , "span", "strong", "style", "sub", "sup", "table", "tbody", "td"
        , "textarea", "tfoot", "th", "thead", "title", "tr", "tt", "ul", "var"
        ]
    , leafs =
        [ "area", "br", "col", "hr", "link", "img", "input",  "meta", "param"
        ]
    , attributes =
        [ "abbr", "accept", "accesskey", "action", "align", "alt", "archive"
        , "axis", "border", "cellpadding", "cellspacing", "char", "charoff"
        , "charset", "checked", "cite", "class", "classid", "codebase"
        , "codetype", "cols", "colspan", "content", "coords", "data", "datetime"
        , "declare", "defer", "dir", "disabled", "enctype", "for", "frame"
        , "headers", "height", "href", "hreflang", "http-equiv", "id", "label"
        , "lang", "maxlength", "media", "method", "multiple", "name", "nohref"
        , "onabort", "onblur", "onchange", "onclick", "ondblclick", "onfocus"
        , "onkeydown", "onkeypress", "onkeyup", "onload", "onmousedown"
        , "onmousemove", "onmouseout", "onmouseover", "onmouseup", "onreset"
        , "onselect", "onsubmit", "onunload", "profile", "readonly", "rel"
        , "rev", "rows", "rowspan", "rules", "scheme", "scope", "selected"
        , "shape", "size", "span", "src", "standby", "style", "summary"
        , "tabindex", "title", "type", "usemap", "valign", "value", "valuetype"
        , "width"
        ]
    , selfClosing = False
    }

-- | HTML 4.0 Transitional
--
html4Transitional :: HtmlVariant
html4Transitional = HtmlVariant
    { version = ["Html4", "Transitional"]
    , docType =
        [ "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\""
        , "    \"http://www.w3.org/TR/html4/loose.dtd\">"
        ]
    , parents = parents html4Strict ++
        [ "applet", "center", "dir", "font", "iframe", "isindex", "menu"
        , "noframes", "s", "u"
        ]
    , leafs = leafs html4Strict ++ ["basefont"]
    , attributes = attributes html4Strict ++
        [ "background", "bgcolor", "clear", "compact", "hspace", "language"
        , "noshade", "nowrap", "start", "target", "vspace"
        ]
    , selfClosing = False
    }

-- | HTML 4.0 FrameSet
--
html4FrameSet :: HtmlVariant
html4FrameSet = HtmlVariant
    { version = ["Html4", "FrameSet"]
    , docType =
        [ "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 FrameSet//EN\""
        , "    \"http://www.w3.org/TR/html4/frameset.dtd\">"
        ]
    , parents = parents html4Transitional ++ ["frameset"]
    , leafs = leafs html4Transitional ++ ["frame"]
    , attributes = attributes html4Transitional ++
        [ "frameborder", "scrolling"
        ]
    , selfClosing = False
    }

-- | XHTML 1.0 Strict
--
xhtml1Strict :: HtmlVariant
xhtml1Strict = HtmlVariant
    { version = ["XHtml1", "Strict"]
    , docType =
        [ "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\""
        , "    \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">"
        ]
    , parents = parents html4Strict
    , leafs = leafs html4Strict
    , attributes = attributes html4Strict
    , selfClosing = True
    }

-- | XHTML 1.0 Transitional
--
xhtml1Transitional :: HtmlVariant
xhtml1Transitional = HtmlVariant
    { version = ["XHtml1", "Transitional"]
    , docType =
        [ "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\""
        , "    \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">"
        ]
    , parents = parents html4Transitional
    , leafs = leafs html4Transitional
    , attributes = attributes html4Transitional
    , selfClosing = True
    }

-- | XHTML 1.0 FrameSet
--
xhtml1FrameSet :: HtmlVariant
xhtml1FrameSet = HtmlVariant
    { version = ["XHtml1", "FrameSet"]
    , docType =
        [ "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 FrameSet//EN\""
        , "    \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd\">"
        ]
    , parents = parents html4FrameSet
    , leafs = leafs html4FrameSet
    , attributes = attributes html4FrameSet
    , selfClosing = True
    }

-- | HTML 5.0
-- A good reference can be found here:
-- http://www.w3schools.com/html5/html5_reference.asp
--
html5 :: HtmlVariant
html5 = HtmlVariant
    { version = ["Html5"]
    , docType = ["<!DOCTYPE HTML>"]
    , parents =
        [ "a", "abbr", "address", "article", "aside", "audio", "b"
        , "bdo", "blockquote", "body", "button", "canvas", "caption", "cite"
        , "code", "colgroup", "command", "datalist", "dd", "del", "details"
        , "dfn", "div", "dl", "dt", "em", "fieldset", "figcaption", "figure"
        , "footer", "form", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header"
        , "hgroup", "html", "i", "iframe", "ins", "kbd", "label"
        , "legend", "li", "main", "map", "mark", "menu", "meter", "nav"
        , "noscript", "object", "ol", "optgroup", "option", "output", "p"
        , "pre", "progress", "q", "rp", "rt", "ruby", "samp", "script"
        , "section", "select", "small", "span", "strong", "style", "sub"
        , "summary", "sup", "table", "tbody", "td", "textarea", "tfoot", "th"
        , "thead", "time", "title", "tr", "ul", "var", "video"
        ]
    , leafs =
        -- http://www.whatwg.org/specs/web-apps/current-work/multipage/syntax.html#void-elements
        [ "area", "base", "br", "col", "embed", "hr", "img", "input", "keygen"
        , "link", "menuitem", "meta", "param", "source", "track", "wbr"
        ]
    , attributes =
        [ "accept", "accept-charset", "accesskey", "action", "alt", "async"
        , "autocomplete", "autofocus", "autoplay", "challenge", "charset"
        , "checked", "cite", "class", "cols", "colspan", "content"
        , "contenteditable", "contextmenu", "controls", "coords", "data"
        , "datetime", "defer", "dir", "disabled", "draggable", "enctype", "for"
        , "form", "formaction", "formenctype", "formmethod", "formnovalidate"
        , "formtarget", "headers", "height", "hidden", "high", "href"
        , "hreflang", "http-equiv", "icon", "id", "ismap", "item", "itemprop"
        , "itemscope", "itemtype"
        , "keytype", "label", "lang", "list", "loop", "low", "manifest", "max"
        , "maxlength", "media", "method", "min", "multiple", "name"
        , "novalidate", "onbeforeonload", "onbeforeprint", "onblur", "oncanplay"
        , "oncanplaythrough", "onchange", "oncontextmenu", "onclick"
        , "ondblclick", "ondrag", "ondragend", "ondragenter", "ondragleave"
        , "ondragover", "ondragstart", "ondrop", "ondurationchange", "onemptied"
        , "onended", "onerror", "onfocus", "onformchange", "onforminput"
        , "onhaschange", "oninput", "oninvalid", "onkeydown", "onkeyup"
        , "onload", "onloadeddata", "onloadedmetadata", "onloadstart"
        , "onmessage", "onmousedown", "onmousemove", "onmouseout", "onmouseover"
        , "onmouseup", "onmousewheel", "ononline", "onpagehide", "onpageshow"
        , "onpause", "onplay", "onplaying", "onprogress", "onpropstate"
        , "onratechange", "onreadystatechange", "onredo", "onresize", "onscroll"
        , "onseeked", "onseeking", "onselect", "onstalled", "onstorage"
        , "onsubmit", "onsuspend", "ontimeupdate", "onundo", "onunload"
        , "onvolumechange", "onwaiting", "open", "optimum", "pattern", "ping"
        , "placeholder", "preload", "pubdate", "radiogroup", "readonly", "rel"
        , "required", "reversed", "rows", "rowspan", "sandbox", "scope"
        , "scoped", "seamless", "selected", "shape", "size", "sizes", "span"
        , "spellcheck", "src", "srcdoc", "start", "step", "style", "subject"
        , "summary", "tabindex", "target", "title", "type", "usemap", "value"
        , "width", "wrap", "xmlns"
        ]
    , selfClosing = False
    }

-- | XHTML 5.0
--
xhtml5 :: HtmlVariant
xhtml5 = HtmlVariant
    { version = ["XHtml5"]
    , docType = ["<!DOCTYPE HTML>"]
    , parents = parents html5
    , leafs = leafs html5
    , attributes = attributes html5
    , selfClosing = True
    }


-- | A map of HTML variants, per version, lowercase.
--
htmlVariants :: Map String HtmlVariant
htmlVariants = M.fromList $ map (show &&& id)
    [ html4Strict
    , html4Transitional
    , html4FrameSet
    , xhtml1Strict
    , xhtml1Transitional
    , xhtml1FrameSet
    , html5
    , xhtml5
    ]

main :: IO ()
main = mapM_ (writeHtmlVariant . snd) $ M.toList htmlVariants