package b0
Software construction and deployment kit
Install
dune-project
Dependency
Authors
Maintainers
Sources
b0-0.0.6.tbz
sha512=e9aa779e66c08fc763019f16d4706f465d16c05d6400b58fbd0313317ef33ddea51952e2b058db28e65f7ddb7012f328c8bf02d8f1da17bb543348541a2587f0
doc/src/b0.std/b0_html.ml.html
Source file b0_html.ml
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All rights reserved. SPDX-License-Identifier: ISC ---------------------------------------------------------------------------*) (* HTML escaping *) module String_set = Set.Make (String) let add_escaped b s = let adds = Buffer.add_string in let len = String.length s in let max_idx = len - 1 in let flush b start i = if start < len then Buffer.add_substring b s start (i - start); in let rec loop start i = if i > max_idx then flush b start i else let next = i + 1 in match String.get s i with | '&' -> flush b start i; adds b "&"; loop next next | '<' -> flush b start i; adds b "<"; loop next next | '>' -> flush b start i; adds b ">"; loop next next | '\'' -> flush b start i; adds b "'"; loop next next | '\"' -> flush b start i; adds b """; loop next next | c -> loop start next in loop 0 0 let escape s = let b = Buffer.create 255 in add_escaped b s; Buffer.contents b (* Attributes *) module At = struct type name = string type t = name * string let v n v = (n, v) let void = ("", "") let int n i = (n, string_of_int i) let true' n = (n, "") let if' b at = if b then at else void let if_some = function None -> void | Some at -> at let is_void (n, _) = String.equal n "" let equal = Stdlib.( = ) let compare = Stdlib.compare let to_pair = Fun.id let of_pair = Fun.id let pp ppf (n, v) = match n with | "" -> () | n -> Format.fprintf ppf "@[%s=\"%s\"@]" n v type 'a cons = 'a -> t let accesskey s = v "accesskey" s let action s = v "action" s let alt s = v "alt" s let autocomplete s = v "autocomplete" s let autofocus = true' "autofocus" let charset = v "charset" let checked = true' "checked" let class' s = v "class" s let cols i = int "cols" i let colspan i = int "cols" i let content s = v "content" s let contenteditable s = true' "contenteditable" let datetime s = v "datetime" s let defer = true' "defer" let dir s = v "dir" s let disabled = true' "disabled" let draggable b = v "draggable" (string_of_bool true) (* not a boolean attr *) let download s = v "download" s let for' s = v "for" s let height i = int "height" i let = true' "hidden" let href s = v "href" s let id s = v "id" s let lang s = v "lang" s let list s = v "list" s let media s = v "media" s let method' s = v "method" s let name s = v "name" s let placeholder s = v "placeholder" s let popover s = v "popover" s let popovertarget s = v "popovertarget" s let popovertargetaction s = v "popovertargetaction" s let rel s = v "rel" s let required = true' "required" let role s = v "role" s let rows i = int "rows" i let rowspan i = int "rowspan" i let selected = true' "selected" let spellcheck = v "spellcheck" let src s = v "src" s let style s = v "style" s let tabindex i = int "tabindex" i let title s = v "title" s let type' s = v "type" s let value s = v "value" s let width i = int "width" i let wrap s = v "value" s end (* HTML elements and fragments *) module El = struct module Low = struct type name = string type t = | El of name * At.t list * t list | Txt of string | Splice of t option * t list | Raw of string let of_html f = f end type name = Low.name type html = Low.t let v ?(at = []) n cs = Low.El (n, at, cs) let txt v = Low.Txt v let txt_of f v = Low.Txt (f v) let sp = Low.Txt " " let nbsp = Low.Txt "\u{00A0}" let splice ?sep cs = Low.Splice (sep, cs) let unsafe_raw f = Low.Raw f let void = Low.Splice (None, []) let is_void = function | Low.Splice (_, []) | Low.Txt "" | Low.Raw "" -> true | _ -> false (* Rendering *) let addc = Buffer.add_char let adds = Buffer.add_string let add_doctype b = adds b "<!DOCTYPE html>\n" let add_at b n v = adds b n; adds b "=\""; add_escaped b v; addc b '\"' let rec add_atts b cs (* classes *) ss (* styles *) = function | ("", _) :: atts -> add_atts b cs ss atts | ("class", c) :: atts -> add_atts b (c :: cs) ss atts | ("style", s) :: atts -> add_atts b cs (s :: ss) atts | (n, v) :: atts -> addc b ' '; add_at b n v; add_atts b cs ss atts | [] -> let merge sep vs = String.concat sep (List.rev vs) in if cs <> [] then (addc b ' '; add_at b "class" (merge " " cs)); if ss <> [] then (addc b ' '; add_at b "style" (merge ";" ss)) let void_els = String_set.of_list [ "area"; "base"; "br"; "col"; "embed"; "hr"; "img"; "input"; "link"; "meta"; "param"; "source"; "track"; "wbr" ] let rec add_child b = function (* not tail-recursive *) | Low.Raw r -> adds b r | Low.Txt txt -> add_escaped b txt | Low.El (n, atts, cs) -> addc b '<'; adds b n; add_atts b [] [] atts; addc b '>'; if not (String_set.mem n void_els) then (List.iter (add_child b) cs; adds b "</"; adds b n; addc b '>') | Low.Splice (None, cs) -> List.iter (add_child b) cs | Low.Splice (Some sep, []) -> () | Low.Splice (Some sep, c :: cs) -> let add b c = add_child b sep; add_child b c in add_child b c; List.iter (add b) cs let buffer_add ~doctype b cs = if doctype then add_doctype b; add_child b cs let to_string ~doctype g = let b = Buffer.create 1024 in buffer_add ~doctype b g; Buffer.contents b (* Predefined element constructors *) type cons = ?at:At.t list -> html list -> html type void_cons = ?at:At.t list -> unit -> html let cons e ?at els = v ?at e els let void_cons e ?at () = v e ?at [] let a = cons "a" let abbr = cons "abbr" let address = cons "address" let area = void_cons "area" let article = cons "article" let aside = cons "aside" let audio = cons "audio" let b = cons "b" let base = void_cons "base" let bdi = cons "bdi" let bdo = cons "bdo" let blockquote = cons "blockquote" let body = cons "body" let br = void_cons "br" let = cons "button" let canvas = cons "canvas" let caption = cons "caption" let cite = cons "cite" let code = cons "code" let col = void_cons "col" let colgroup = cons "colgroup" let command = cons "command" let datalist = cons "datalist" let dd = cons "dd" let del = cons "del" let details = cons "details" let dfn = cons "dfn" let div = cons "div" let dl = cons "dl" let dt = cons "dt" let em = cons "em" let embed = void_cons "embed" let fieldset = cons "fieldset" let figcaption = cons "figcaption" let figure = cons "figure" let = cons "footer" let form = cons "form" let h1 = cons "h1" let h2 = cons "h2" let h3 = cons "h3" let h4 = cons "h4" let h5 = cons "h5" let h6 = cons "h6" let head = cons "head" let header = cons "header" let hgroup = cons "hgroup" let hr = void_cons "hr" let html = cons "html" let i = cons "i" let iframe = cons "iframe" let img = void_cons "img" let input = void_cons "input" let ins = cons "ins" let kbd = cons "kbd" let keygen = cons "keygen" let label = cons "label" let legend = cons "legend" let li = cons "li" let link = void_cons "link" let main = cons "main" let map = cons "map" let mark = cons "mark" let = cons "menu" let meta = void_cons "meta" let meter = cons "meter" let = cons "nav" let noscript = cons "noscript" let object' = cons "object" let ol = cons "ol" let optgroup = cons "optgroup" let option = cons "option" let output = cons "output" let p = cons "p" let param = void_cons "param" let pre = cons "pre" let progress = cons "progress" let q = cons "q" let rp = cons "rp" let rt = cons "rt" let ruby = cons "ruby" let s = cons "s" let samp = cons "samp" let script = cons "script" let section = cons "section" let select = cons "select" let small = cons "small" let source = void_cons "source" let span = cons "span" let strong = cons "strong" let style = cons "style" let sub = cons "sub" let summary = cons "summary" let sup = cons "sup" let table = cons "table" let tbody = cons "tbody" let td = cons "td" let textarea = cons "textarea" let tfoot = cons "tfoot" let th = cons "th" let thead = cons "thead" let time = cons "time" let title = cons "title" let tr = cons "tr" let track = void_cons "track" let u = cons "u" let ul = cons "ul" let var = cons "var" let video = cons "video" let wbr = void_cons "wbr" (* Page *) let page ?(lang = "") ?(generator = "") ?(styles = []) ?(scripts = []) ?(more_head = void) ~title:t body = let viewport = "width=device-width, initial-scale=1.0, viewport-fit=cover" in let generator = match generator with | "" -> void | g -> meta ~at:At.[name "generator"; content g] () in let style = function | "" -> void | url -> link ~at:At.[rel "stylesheet"; type' "text/css"; href url] () in let script = function | "" -> void | url -> script ~at:At.[type' "text/javascript"; defer; src url] [] in let t = match String.trim t with "" -> "Untitled" | t -> t in let head = head [ meta ~at:At.[charset "utf-8"] (); generator; meta ~at:At.[name "viewport"; content viewport] (); splice (List.map style styles); splice (List.map script scripts); more_head; title [txt t]] in let at = if lang = "" then [] else [At.lang lang] in html ~at [head; body] let title_of_filepath f = let rec base ~snd init f = let start = ref init in let last = ref (init + 1) in while not (!start < 0 || f.[!start] = '/' || f.[!start] = '\\') do if f.[!start] = '.' then last := !start; decr start done; let first = !start + 1 in let last = !last - 1 in if first <= last && last <= init then begin let s = String.sub f first (last - first + 1) in if not (s = "index" || s = "") then s else if snd = true then "Untitled" else base ~snd:true (!start - 1) f end else if !start < 0 || snd = true then "Untitled" else base ~snd:true (!start - 1) f in base ~snd:false (String.length f - 1) f end