package textutils_kernel
Text output utilities
Install
Dune Dependency
Authors
Maintainers
Sources
textutils_kernel-v0.14.0.tar.gz
sha256=633c2079cb5250dffee6a1329b28d63fa863a66489369f85f9dcc0e4256db0f0
md5=60108803a21379909ca35d2ba96d3843
doc/src/textutils_kernel.text_block/text_block.ml.html
Source file text_block.ml
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
open Core_kernel open Int.Replace_polymorphic_compare type dims = { width : int ; height : int } let sexp_of_dims { width; height } = sexp_of_string (sprintf "w%dh%d" width height) let dims_invariant { width; height } = assert (width >= 0); assert (height >= 0) ;; type valign = [ `Top | `Bottom | `Center ] [@@deriving sexp_of] type halign = [ `Left | `Right | `Center ] [@@deriving sexp_of] type t = | Text of string | Fill of char * dims | Hcat of t * t * dims | Vcat of t * t * dims | Ansi of string option * t * string option * dims [@@deriving sexp_of] let height = function | Text _ -> 1 | Fill (_, d) | Hcat (_, _, d) | Vcat (_, _, d) | Ansi (_, _, _, d) -> d.height ;; let width = function | Text s -> String.length s | Fill (_, d) | Hcat (_, _, d) | Vcat (_, _, d) | Ansi (_, _, _, d) -> d.width ;; let rec invariant t = match t with | Text s -> assert (not (String.mem s '\n')) | Fill (_, dims) -> dims_invariant dims | Hcat (t1, t2, dims) -> dims_invariant dims; invariant t1; invariant t2; [%test_result: int] (height t1) ~expect:dims.height; [%test_result: int] (height t2) ~expect:dims.height; [%test_result: int] (width t1 + width t2) ~expect:dims.width | Vcat (t1, t2, dims) -> dims_invariant dims; invariant t1; invariant t2; [%test_result: int] (width t1) ~expect:dims.width; [%test_result: int] (width t2) ~expect:dims.width; [%test_result: int] (height t1 + height t2) ~expect:dims.height | Ansi (_, t, _, dims) -> dims_invariant dims; invariant t; [%test_result: int] (width t) ~expect:dims.width; [%test_result: int] (height t) ~expect:dims.height ;; let fill_generic ch ~width ~height = assert (width >= 0); assert (height >= 0); Fill (ch, { width; height }) ;; let fill ch ~width ~height = fill_generic ch ~width ~height let space ~width ~height = fill_generic ' ' ~width ~height let nil = space ~width:0 ~height:0 let hstrut width = space ~width ~height:0 let vstrut height = space ~height ~width:0 let dims t = { width = width t; height = height t } let halve n = let fst = n / 2 in let snd = fst + (n mod 2) in fst, snd ;; let ansi_escape ?prefix ?suffix t = Ansi (prefix, t, suffix, dims t) let rec hpad t ~align delta = assert (delta >= 0); if delta = 0 then t else ( let height = height t in let pad = space ~height ~width:delta in match align with | `Left -> Hcat (t, pad, { height; width = width t + delta }) | `Right -> Hcat (pad, t, { height; width = width t + delta }) | `Center -> let delta1, delta2 = halve delta in let t = hpad t ~align:`Left delta1 in let t = hpad t ~align:`Right delta2 in t) ;; let rec vpad t ~align delta = assert (delta >= 0); if delta = 0 then t else ( let width = width t in let pad = space ~width ~height:delta in match align with | `Top -> Vcat (t, pad, { width; height = height t + delta }) | `Bottom -> Vcat (pad, t, { width; height = height t + delta }) | `Center -> let delta1, delta2 = halve delta in let t = vpad t ~align:`Top delta1 in let t = vpad t ~align:`Bottom delta2 in t) ;; let max_height ts = List.fold ts ~init:0 ~f:(fun acc t -> Int.max acc (height t)) let max_width ts = List.fold ts ~init:0 ~f:(fun acc t -> Int.max acc (width t)) let valign align ts = let h = max_height ts in List.map ts ~f:(fun t -> vpad ~align t (h - height t)) ;; let halign align ts = let w = max_width ts in List.map ts ~f:(fun t -> hpad ~align t (w - width t)) ;; let hcat ?(align = `Top) ?sep ts = let ts = Option.fold sep ~init:ts ~f:(fun ts sep -> List.intersperse ts ~sep) in let ts = valign align ts in match ts with | [] -> nil | t :: ts -> List.fold ~init:t ts ~f:(fun acc t -> assert (height acc = height t); Hcat (acc, t, { height = height acc; width = width acc + width t })) ;; let vcat ?(align = `Left) ?sep ts = let ts = Option.fold sep ~init:ts ~f:(fun ts sep -> List.intersperse ts ~sep) in let ts = halign align ts in match ts with | [] -> nil | t :: ts -> List.fold ~init:t ts ~f:(fun acc t -> assert (width acc = width t); Vcat (acc, t, { width = width acc; height = height acc + height t })) ;; let text_of_lines lines ~align = lines |> List.map ~f:(fun line -> Text line) |> vcat ~align ;; let text_no_wrap ~align str = if String.mem str '\n' then String.split ~on:'\n' str |> text_of_lines ~align else Text str ;; let word_wrap str ~max_width = String.split str ~on:' ' |> List.concat_map ~f:(String.split ~on:'\n') |> List.filter ~f:(Fn.non String.is_empty) |> List.fold ~init:(Fqueue.empty, Fqueue.empty, 0) ~f:(fun (lines, line, len) word -> let n = String.length word in let n' = len + 1 + n in if n' > max_width then Fqueue.enqueue lines line, Fqueue.singleton word, n else lines, Fqueue.enqueue line word, n') |> (fun (lines, line, _) -> Fqueue.enqueue lines line) |> Fqueue.map ~f:(fun line -> Fqueue.to_list line |> String.concat ~sep:" ") |> Fqueue.to_list ;; let text ?(align = `Left) ?max_width str = match max_width with | None -> text_no_wrap ~align str | Some max_width -> word_wrap str ~max_width |> text_of_lines ~align ;; (* an abstract renderer, instantiated once to compute line lengths and then again to actually produce a string. *) let render_abstract t ~write_direct ~line_length = for j = 0 to height t - 1 do write_direct '\n' (line_length j) j done; let next_i = Array.init (height t) ~f:(fun _ -> 0) in let add_char c j = let i = next_i.(j) in next_i.(j) <- i + 1; write_direct c i j in let write_string s j = for i = 0 to String.length s - 1 do add_char s.[i] j done in let rec aux t j_offset = match t with | Text s -> write_string s j_offset | Fill (ch, d) -> for _i = 0 to d.width - 1 do for j = 0 to d.height - 1 do add_char ch (j + j_offset) done done | Vcat (t1, t2, _) -> aux t1 j_offset; aux t2 (j_offset + height t1) | Hcat (t1, t2, _) -> aux t1 j_offset; aux t2 j_offset | Ansi (prefix, t, suffix, _) -> let vcopy s = Option.iter s ~f:(fun s -> for j = 0 to height t - 1 do write_string s (j + j_offset) done) in vcopy prefix; aux t j_offset; vcopy suffix in aux t 0 ;; let line_lengths t = let r = Array.create ~len:(height t) 0 in let write_direct c i j = if not (Char.is_whitespace c) then r.(j) <- Int.max r.(j) (i + 1) in let line_length _ = -1 (* doesn't matter *) in render_abstract t ~write_direct ~line_length; r ;; let render t = let height = height t in if height = 0 then "" else ( let line_lengths = line_lengths t in let line_offsets, buflen = let r = Array.create ~len:height 0 in let line_offset j = r.(j - 1) + line_lengths.(j - 1) + 1 in for j = 1 to height - 1 do r.(j) <- line_offset j done; r, line_offset height in let buf = Bytes.make buflen ' ' in let write_direct c i j = if Char.equal c '\n' || i < line_lengths.(j) then Bytes.set buf (i + line_offsets.(j)) c in let line_length j = line_lengths.(j) in render_abstract t ~write_direct ~line_length; Bytes.unsafe_to_string ~no_mutation_while_string_reachable:buf) ;; (* header compression *) let rec cons x = function | [] -> [ x ] | y :: zs -> if height x < height y then x :: y :: zs else cons (hcat ~align:`Bottom [ x; y ]) zs ;; let compress_table_header ?(sep_width = 2) (`Cols cols) = let cols = List.map cols ~f:(fun (header, data, align) -> header, Int.max 1 (max_width data), halign align data) in let header = hcat ~align:`Bottom (List.fold_right cols ~init:[] ~f:(fun (header, max_width, _) stairs -> let rec loop stairs acc = let stop () = cons (vcat ~align:`Left [ header; acc ]) stairs in match stairs with | [] -> stop () | x :: rest -> if width header + sep_width <= width acc then stop () else loop rest (hcat [ vcat ~align:`Left [ fill '|' ~width:1 ~height:(height x - height acc); acc ] ; x ]) in loop stairs (vcat ~align:`Left [ text "|"; hstrut (max_width + sep_width) ]))) in let rows = List.map cols ~f:(fun (_, _, data) -> data) |> List.transpose_exn |> List.map ~f:(fun row -> hcat row ~sep:(hstrut sep_width)) in `Header header, `Rows rows ;; let table ?(sep_width = 2) (`Cols cols) = let cols = List.map cols ~f:(fun (data, align) -> Int.max 1 (max_width data), halign align data) in let rows = List.map cols ~f:(fun (_, data) -> data) |> List.transpose_exn |> List.map ~f:(fun row -> hcat row ~sep:(hstrut sep_width)) in `Rows rows ;; (* convenience definitions *) let vsep = vstrut 1 let hsep = hstrut 1 let indent ?(n = 2) t = hcat [ hstrut n; t ] let sexp sexp_of_a a = sexp_of_a a |> Sexp.to_string_hum |> text let textf ?align ?max_width fmt = ksprintf (text ?align ?max_width) fmt module List_with_static_lengths = struct type ('a, 'shape) t = | [] : (_, [ `nil ]) t | ( :: ) : 'a * ('a, 'shape) t -> ('a, [ `cons of 'shape ]) t let rec to_list : type a shape. (a, shape) t -> a list = function | [] -> [] | hd :: tl -> hd :: to_list tl ;; let rec of_same_length_list_exn : type a shape. (a, shape) t -> a list -> (a, shape) t = fun t list -> match t with | [] -> if not (List.is_empty list) then failwith "list is too long"; [] | _ :: t_tl -> (match list with | [] -> failwith "list is too short" | list_hd :: list_tl -> list_hd :: of_same_length_list_exn t_tl list_tl) ;; end module With_static_lengths = struct let make align alignment static_length_list = List_with_static_lengths.of_same_length_list_exn static_length_list (align alignment (List_with_static_lengths.to_list static_length_list)) ;; let halign h = make halign h let valign v = make valign v module List = List_with_static_lengths end
sectionYPositions = computeSectionYPositions($el), 10)"
x-init="setTimeout(() => sectionYPositions = computeSectionYPositions($el), 10)"
>