Source: tw_html.ml (p.tw.1.0.0.doc.src.tw.html)

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 503module Css = Cascade.Css (* HTML component module implementation with integrated Tailwind CSS *) (* Helper function to concatenate strings *) let str = String.concat "" (* Minimal Htmlit implementation - adapted from Htmlit library Original source: https://github.com/dbuenzli/htmlit Copyright (c) 2016 The htmlit programmers License: ISC This is a minimal subset of Htmlit functionality needed for tw. The implementation has been simplified to avoid Format dependency. *) module El = struct type html = | Element of string * (string * string) list * html list | Text of string | Void | Raw of string let v ~at name children = Element (name, at, children) let txt s = Text s let void = Void let unsafe_raw s = Raw s let escape_html s = let b = Buffer.create (String.length s) in String.iter (function | '<' -> Buffer.add_string b "<" | '>' -> Buffer.add_string b ">" | '&' -> Buffer.add_string b "&" | '"' -> Buffer.add_string b """ | '\'' -> Buffer.add_string b "'" | c -> Buffer.add_char b c) s; Buffer.contents b let rec to_string ?(doctype = false) = function | Text s -> escape_html s | Raw s -> s | Void -> "" | Element (name, attrs, children) -> let b = Buffer.create 256 in if doctype && name = "html" then Buffer.add_string b "<!DOCTYPE html>\n"; Buffer.add_char b '<'; Buffer.add_string b name; List.iter (fun (k, v) -> Buffer.add_char b ' '; Buffer.add_string b k; Buffer.add_string b "=\""; Buffer.add_string b (escape_html v); Buffer.add_char b '"') attrs; if children = [] && List.mem name [ "img"; "br"; "hr"; "input"; "meta"; "link" ] then Buffer.add_string b " />" else ( Buffer.add_char b '>'; List.iter (fun child -> Buffer.add_string b (to_string child)) children; Buffer.add_string b "</"; Buffer.add_string b name; Buffer.add_char b '>'); Buffer.contents b end module At = struct type t = string * string let v name value = (name, value) let class' s = ("class", s) let id s = ("id", s) let title s = ("title", s) let lang s = ("lang", s) let dir s = ("dir", s) let tabindex i = ("tabindex", string_of_int i) let contenteditable b = ("contenteditable", if b then "true" else "false") let spellcheck s = ("spellcheck", s) let type' s = ("type", s) let value s = ("value", s) let name s = ("name", s) let placeholder s = ("placeholder", s) let required = ("required", "") let disabled = ("disabled", "") let checked = ("checked", "") let href s = ("href", s) let rel s = ("rel", s) let src s = ("src", s) let alt s = ("alt", s) let width i = ("width", string_of_int i) let height i = ("height", string_of_int i) let charset s = ("charset", s) let content s = ("content", s) let style s = ("style", s) (* Additional attributes from the second At module *) let onclick s = v "onclick" s let onchange s = v "onchange" s let oninput s = v "oninput" s let onsubmit s = v "onsubmit" s let readonly = v "readonly" "" let target s = v "target" s let download s = v "download" s let loading s = v "loading" s let property s = v "property" s let datetime s = v "datetime" s let srcset s = v "srcset" s let sizes s = v "sizes" s let title' s = v "title" s let loading_lazy = v "loading" "lazy" let true' name = v name "" let false' name = v name "false" (* Void attribute for conditionals *) let void = ("", "") let if' cond at = if cond then at else void let if_some = function Some at -> at | None -> void let is_void (name, _) = name = "" let to_pair at = at let of_pair p = p (* Additional HTML5 attributes *) let accesskey s = v "accesskey" s let action s = v "action" s let autocomplete s = v "autocomplete" s let autofocus = v "autofocus" "" let cols i = v "cols" (string_of_int i) let colspan i = v "colspan" (string_of_int i) let defer = v "defer" "" let draggable b = v "draggable" (if b then "true" else "false") let for' s = v "for" s let hidden = v "hidden" "" let list s = v "list" s let method' s = v "method" s let media s = v "media" s let popover s = v "popover" s let popovertarget s = v "popovertarget" s let popovertargetaction s = v "popovertargetaction" s let rows i = v "rows" (string_of_int i) let rowspan i = v "rowspan" (string_of_int i) let selected = v "selected" "" let wrap s = v "wrap" s (* SVG attributes *) let fill_rule `evenodd = v "fill-rule" "evenodd" let clip_rule `evenodd = v "clip-rule" "evenodd" let cx i = v "cx" (string_of_int i) let cy i = v "cy" (string_of_int i) let r i = v "r" (string_of_int i) let view_box s = v "viewBox" s let fill s = v "fill" s let stroke s = v "stroke" s let stroke_width s = v "stroke-width" s let stroke_linecap s = v "stroke-linecap" s let stroke_linejoin s = v "stroke-linejoin" s let x s = v "x" s let y s = v "y" s let rx s = v "rx" s let d s = v "d" s let x1 s = v "x1" s let y1 s = v "y1" s let x2 s = v "x2" s let y2 s = v "y2" s end type tw = Tw.t (* Type that combines HTML element with its Tailwind classes *) type t = { el : El.html; tw : tw list; forms : bool } (* Attribute type - abstract to prevent direct usage of class' *) type attr = At.t (* Aria module *) module Aria = struct let label s = At.v "aria-label" s let labelledby s = At.v "aria-labelledby" s let describedby s = At.v "aria-describedby" s let hidden = At.v "aria-hidden" "true" let expanded b = At.v "aria-expanded" (string_of_bool b) let current s = At.v "aria-current" s let role s = At.v "role" s end (* Internal helper to convert to El.html *) let to_htmlit t = t.el let to_tw t = t.tw let has_forms t = t.forms (* Text helpers *) let txt s = { el = El.txt s; tw = []; forms = false } let txtf segments = txt (str segments) let raw s = { el = El.unsafe_raw s; tw = []; forms = false } let rawf segments = raw (str segments) (* Empty element *) let empty = { el = El.void; tw = []; forms = false } (* Build final attribute list from tw styles, raw class strings, and non-class attrs *) let class_atts tw_styles raw_classes other_atts = let tw_cls = match tw_styles with [] -> "" | _ -> Tw.to_classes tw_styles in let all_cls = match (tw_cls, raw_classes) with | "", [] -> "" | s, [] -> s | "", parts -> String.concat " " parts | s, parts -> String.concat " " (s :: parts) in match all_cls with | "" -> List.rev other_atts | cls -> At.class' cls :: List.rev other_atts (* Parse a class string, returning (recognized_tw, raw_strings) *) let parse_class_value value = let classes = String.split_on_char ' ' value |> List.filter (fun s -> s <> "") in List.fold_left (fun (tw_acc, raw_acc) cls -> match Tw.of_string cls with | Ok t -> (t :: tw_acc, raw_acc) | Error _ -> (tw_acc, cls :: raw_acc)) ([], []) classes (* Extract class attrs from at, parse recognized Tw classes, keep unrecognized as-is. Returns (tw_extras, raw_class_parts, other_atts) *) let extract_class_attrs atts = List.fold_left (fun (tw_extra, raw_cls, rest) ((name, value) as att) -> if name = "class" then let tw_parsed, raw = parse_class_value value in (List.rev tw_parsed @ tw_extra, List.rev raw @ raw_cls, rest) else (tw_extra, raw_cls, att :: rest)) ([], [], []) atts (* Helper to create elements - applies tw classes immediately *) let el_with_tw ?(forms = false) name ?at ?(tw = []) children = let atts = Option.value ~default:[] at in let tw_from_at, raw_classes, other_atts = extract_class_attrs atts in let all_tw_styles = tw @ tw_from_at in let atts_with_tw = class_atts all_tw_styles raw_classes other_atts in (* Convert children to Htmlit elements *) let child_els = List.map to_htmlit children in (* Collect all tw styles from this element and its children *) let all_tw = all_tw_styles @ List.concat_map to_tw children in (* Propagate forms flag from children or this element *) let has_forms = forms || List.exists (fun c -> c.forms) children in { el = El.v ~at:atts_with_tw name child_els; tw = all_tw; forms = has_forms } (* Convert to string *) let to_string ?(doctype = false) t = El.to_string ~doctype (to_htmlit t) (* Livereload module *) module Livereload = struct let enabled = try Sys.getenv "SITE_LIVERELOAD" = "true" with Not_found -> false let endpoint = try Sys.getenv "SITE_LIVERELOAD_ENDPOINT" with Not_found -> "ws://localhost:8080" let script = if enabled then raw (str [ "<script>\n"; "(function() {\n"; " const ws = new WebSocket('"; endpoint; "');\n"; " ws.onmessage = (event) => {\n"; " if (event.data === 'reload') {\n"; " location.reload();\n"; " }\n"; " };\n"; "})();\n"; "</script>"; ]) else empty end (* HTML Elements with optional Tailwind classes *) let div ?at ?tw children = el_with_tw "div" ?at ?tw children let span ?at ?tw children = el_with_tw "span" ?at ?tw children let p ?at ?tw children = el_with_tw "p" ?at ?tw children let a ?at ?tw children = el_with_tw "a" ?at ?tw children let ul ?at ?tw children = el_with_tw "ul" ?at ?tw children let li ?at ?tw children = el_with_tw "li" ?at ?tw children let nav ?at ?tw children = el_with_tw "nav" ?at ?tw children let section ?at ?tw children = el_with_tw "section" ?at ?tw children let article ?at ?tw children = el_with_tw "article" ?at ?tw children let header ?at ?tw children = el_with_tw "header" ?at ?tw children let footer ?at ?tw children = el_with_tw "footer" ?at ?tw children let h1 ?at ?tw children = el_with_tw "h1" ?at ?tw children let h2 ?at ?tw children = el_with_tw "h2" ?at ?tw children let h3 ?at ?tw children = el_with_tw "h3" ?at ?tw children let h4 ?at ?tw children = el_with_tw "h4" ?at ?tw children let h5 ?at ?tw children = el_with_tw "h5" ?at ?tw children let h6 ?at ?tw children = el_with_tw "h6" ?at ?tw children let script ?at ?tw children = el_with_tw "script" ?at ?tw children let title ?at ?tw children = el_with_tw "title" ?at ?tw children let head ?at ?tw children = el_with_tw "head" ?at ?tw children let body ?at ?tw children = el_with_tw "body" ?at ?tw children let root ?at ?tw children = el_with_tw "html" ?at ?tw children let option ?at ?tw children = el_with_tw "option" ?at ?tw children let select ?at ?tw children = el_with_tw ~forms:true "select" ?at ?tw children let main ?at ?tw children = el_with_tw "main" ?at ?tw children let aside ?at ?tw children = el_with_tw "aside" ?at ?tw children let time ?at ?tw children = el_with_tw "time" ?at ?tw children let dialog ?at ?tw children = el_with_tw "dialog" ?at ?tw children let data ?at ?tw children = el_with_tw "data" ?at ?tw children let picture ?at ?tw children = el_with_tw "picture" ?at ?tw children let slot ?at ?tw children = el_with_tw "slot" ?at ?tw children let template ?at ?tw children = el_with_tw "template" ?at ?tw children (* Void elements *) let void_el ?(forms = false) name ?at ?(tw = []) () = let atts = Option.value ~default:[] at in let tw_from_at, raw_classes, other_atts = extract_class_attrs atts in let all_tw = tw @ tw_from_at in let atts_with_tw = class_atts all_tw raw_classes other_atts in { el = El.v ~at:atts_with_tw name []; tw = all_tw; forms } let img ?at ?tw () = void_el "img" ?at ?tw () let meta ?at ?tw () = void_el "meta" ?at ?tw () let link ?at ?tw () = void_el "link" ?at ?tw () (* The <style> element holds raw CSS. Its content is emitted unescaped because <style> is a raw-text element: escaping would turn selectors such as [ol>li] into [ol>li] and corrupt the stylesheet. *) let style ?at ?(tw = []) css = let atts = Option.value ~default:[] at in let tw_from_at, raw_classes, other_atts = extract_class_attrs atts in let all_tw = tw @ tw_from_at in let atts_with_tw = class_atts all_tw raw_classes other_atts in { el = El.v ~at:atts_with_tw "style" [ El.unsafe_raw css ]; tw = all_tw; forms = false; } (* Void is now an alias for empty *) let void = empty (* Forms *) let form ?at ?tw children = el_with_tw "form" ?at ?tw children let input ?at ?tw () = void_el ~forms:true "input" ?at ?tw () let textarea ?at ?tw children = el_with_tw ~forms:true "textarea" ?at ?tw children let button ?at ?tw children = el_with_tw "button" ?at ?tw children let label ?at ?tw children = el_with_tw "label" ?at ?tw children let fieldset ?at ?tw children = el_with_tw "fieldset" ?at ?tw children let legend ?at ?tw children = el_with_tw "legend" ?at ?tw children (* Interactive elements *) let details ?at ?tw children = el_with_tw "details" ?at ?tw children let summary ?at ?tw children = el_with_tw "summary" ?at ?tw children (* Text content *) let pre ?at ?tw children = el_with_tw "pre" ?at ?tw children let code ?at ?tw children = el_with_tw "code" ?at ?tw children let kbd ?at ?tw children = el_with_tw "kbd" ?at ?tw children let em ?at ?tw children = el_with_tw "em" ?at ?tw children let strong ?at ?tw children = el_with_tw "strong" ?at ?tw children let small ?at ?tw children = el_with_tw "small" ?at ?tw children let mark ?at ?tw children = el_with_tw "mark" ?at ?tw children (* Breaks *) let br ?at ?tw () = void_el "br" ?at ?tw () let hr ?at ?tw () = void_el "hr" ?at ?tw () (* Tables *) let table ?at ?tw children = el_with_tw "table" ?at ?tw children let thead ?at ?tw children = el_with_tw "thead" ?at ?tw children let tbody ?at ?tw children = el_with_tw "tbody" ?at ?tw children let tfoot ?at ?tw children = el_with_tw "tfoot" ?at ?tw children let tr ?at ?tw children = el_with_tw "tr" ?at ?tw children let th ?at ?tw children = el_with_tw "th" ?at ?tw children let td ?at ?tw children = el_with_tw "td" ?at ?tw children (* Lists *) let ol ?at ?tw children = el_with_tw "ol" ?at ?tw children let dl ?at ?tw children = el_with_tw "dl" ?at ?tw children let dt ?at ?tw children = el_with_tw "dt" ?at ?tw children let dd ?at ?tw children = el_with_tw "dd" ?at ?tw children (* Quotations *) let blockquote ?at ?tw children = el_with_tw "blockquote" ?at ?tw children (* Figures *) let figure ?at ?tw children = el_with_tw "figure" ?at ?tw children let figcaption ?at ?tw children = el_with_tw "figcaption" ?at ?tw children (* Media *) let video ?at ?tw children = el_with_tw "video" ?at ?tw children let audio ?at ?tw children = el_with_tw "audio" ?at ?tw children let source ?at ?tw () = void_el "source" ?at ?tw () (* Embedded content *) let canvas ?at ?tw children = el_with_tw "canvas" ?at ?tw children let iframe ?at ?tw children = el_with_tw "iframe" ?at ?tw children (* SVG elements *) let svg ?at ?tw children = el_with_tw "svg" ?at ?tw children let g ?at ?tw children = el_with_tw "g" ?at ?tw children let circle ?at ?tw children = el_with_tw "circle" ?at ?tw children let rect ?at ?tw children = el_with_tw "rect" ?at ?tw children let path ?at ?tw children = el_with_tw "path" ?at ?tw children let line ?at ?tw children = el_with_tw "line" ?at ?tw children (* CSS delivery strategy: link to an external stylesheet (with cache busting) or inline the stylesheet directly into the document. *) type tw_css = Link of string | Inline (* Type for page generation result *) type page = { html : string; css : Tw.Css.t; tw_css : tw_css } let page_impl ~lang ~meta_list ?title_text ~charset ~tw_css ?forms head_content body_content = (* Build HTML tree with placeholder for CSS link *) let meta_charset = meta ~at:[ At.charset charset ] () in let meta_tags = meta_charset :: List.map (fun (name, content) -> meta ~at:[ At.name name; At.content content ] ()) meta_list in (* Create the body and collect all Tw styles *) let body_element = body body_content in let all_tw = to_tw body_element in (* Add styles from head content *) let all_tw = all_tw @ List.concat_map to_tw head_content in (* The forms plugin base layer follows Tailwind's [\@plugin] model: it is emitted only when the plugin is explicitly enabled ([~forms:true]), since a page merely containing form controls does not opt into the plugin. When [forms] is unset, [Tw.to_css] auto-detects from forms utility usage, the same way prose styling is driven by the [prose] utility. *) let css_stylesheet = match forms with | Some forms -> Tw.to_css ~forms all_tw | None -> Tw.to_css all_tw in let css_string = Tw.Css.to_string ~minify:true css_stylesheet in (* Build the head CSS node: a cache-busted <link> for an external stylesheet, or an inline <style> when the stylesheet is embedded in the document. *) let css_head = match tw_css with | Inline -> style css_string | Link file -> (* Compute MD5 hash of the CSS content for cache busting *) let css_hash = let digest = Digest.string css_string in (* Use the first 8 hex chars of the MD5 digest *) String.sub (Digest.to_hex digest) 0 8 in let css_url_with_hash = String.concat "" [ file; "?v="; css_hash ] in link ~at:[ At.rel "stylesheet"; At.href css_url_with_hash ] () in let head_children = meta_tags @ (match title_text with Some t -> [ title [ txt t ] ] | None -> []) @ [ css_head ] @ head_content in let html_tree = root ~at:[ At.lang lang ] [ head head_children; body_element ] in let html_string = to_string ~doctype:true html_tree in { html = html_string; css = css_stylesheet; tw_css } (* Page generation with CSS - use renamed parameters to avoid shadowing *) let page ?(lang = "en") ?(meta = []) ?title ?(charset = "utf-8") ?(tw_css = Link "tw.css") ?forms head_content body_content = page_impl ~lang ~meta_list:meta ?title_text:title ~charset ~tw_css ?forms head_content body_content (* Page accessor functions *) let html page = page.html let css page = match page.tw_css with | Link file -> (Some file, page.css) | Inline -> (None, page.css) (* Pretty printing *) let pp t = let tw_classes = Tw.to_classes t.tw in let el_str = El.to_string ~doctype:false t.el in if tw_classes = "" then el_str else String.concat "" [ "<element with classes=\""; tw_classes; "\">"; el_str; "</element>" ]