textutils_kernel v0.17.0 (latest)

type t

Two-dimensional blocks of UTF-8 text. This module makes a naive assumption that each Unicode scalar value has a display width of 1. If this is not the case, the width calculations will be incorrect. See String.Utf8.length_in_uchars for details.

val sexp_of_t : t -> Sexplib0.Sexp.t

include Core.Invariant.S with type t := t

val invariant : t -> unit

val nil : t

The empty block. a left and right unit to both hcat and vcat

val fill : char -> width:int -> height:int -> t

fill and space assume width and height are non-negative

val space : width:int -> height:int -> t

val fill_uchar : Core.Uchar.t -> width:int -> height:int -> t

Fill a space with a Unicode scalar value

type valign = [

| `Top
| `Bottom
| `Center

]

Vertical and horizontal alignment specifications

type halign = [

| `Left
| `Right
| `Center

]

val text : ?align:halign -> ?max_width:int -> string -> t

A basic block of UTF-8 text, split on newlines and horizontally aligned as specified.

If max_width is provided, split each line of the input on whitespace and wrap words to respect the request. So long as no words are longer than max_width, the resulting text block will be no wider than max_width.

val textf : 
  ?align:halign ->
  ?max_width:int ->
  ('r, unit, string, t) Core.format4 ->
  'r

Like text, but takes a format string like printf

val vcat : ?align:halign -> ?sep:t -> t list -> t

Vertical concatenation with alignment

val hcat : ?align:valign -> ?sep:t -> t list -> t

Horizontal concatenation with alignment

Text block dimensions

val width : t -> int

val height : t -> int

Vertical and horizontal sequence alignment. Both valign and halign return a list of the same length as the input, with the corresponding elements padded to the appropriate alignment.

If you have a list of a statically known length, using With_static_lengths.valign or With_static_lengths.halign below will let the type checker know that the length of the returned list is equal to the length of the input list.

val valign : valign -> t list -> t list

val halign : halign -> t list -> t list

Empty blocks with either horizontal or vertical extent -- useful for specifying a minimum width or height in conjunction with valign or halign, respectively

val hstrut : int -> t

val vstrut : int -> t

val ansi_escape : ?prefix:string -> ?suffix:string -> t -> t

Wrap a block with an ANSI escape sequence. The prefix and suffix arguments should render with zero width and height.

val render : t -> string

render a block of text as a string

val table : 
  ?sep_width:int ->
  [ `Cols of (t list * halign) list ] ->
  [ `Rows of t list ]

Alignment of a 2D grid of blocks

val compress_table_header : 
  ?sep_width:int ->
  [ `Cols of (t * t list * halign) list ] ->
  [ `Header of t ] * [ `Rows of t list ]

Compress table header according to column widths.

Input: a list of columns of the form (title, values, column alignment). Output: one header block and row sequence. Raises: if the values lists are not the same length in each column. Example:

                                                 first name
      age  first name  last name            age  |     last name
      |    |           |            ==>     |    |     |
      30   sue         smith                30   sue   smith
      18   bill        rodriguez            18   bill  rodriguez
      76   rick        jones                76   rick  jones

module Boxed : sig ... end

Combinators for building up cell structures separated by box characters: e.g.

val boxed : Boxed.t -> t

See comment for Boxed

module Up_or_down : sig ... end

val span_banner : 
  extend_left:bool ->
  extend_right:bool ->
  length:int ->
  points:Up_or_down.t ->
  ?label:t ->
  unit ->
  t

span_banner produces text blocks that indicate the extent of something else

        extend_left
        |      extend_right
        |      |      points
        |      |      |     span_banner ...
        |      |      |     |           span_banner ~label ...
        |      |      |     |           |

        true   true   Up    ──────────  ─┬────────
                                         label

        true   false  Up    ─────────┘  ─┬───────┘
                                         label

        false  true   Up    └─────────  └┬────────
                                         label

        false  false  Up    └────────┘  └┬───────┘
                                         label

        true   true   Down               label
                            ──────────  ─┴────────

        true   false  Down               label
                            ─────────┐  ─┴───────┐

        false  true   Down               label
                            ┌─────────  ┌┴────────

        false  false  Down               label
                            ┌────────┐  ┌┴───────┐ |}];

val vsep : t

vsep = vstrut 1

val hsep : t

hsep = hstrut 1

val indent : ?n:int -> t -> t

indent ~n t = hcat [hstrut n; t]. n defaults to 2

val sexp : ('a -> Core.Sexp.t) -> 'a -> t

sexp sexp_of_a a = sexp_of_a a |> Sexp.to_string |> text

module With_static_lengths : sig ... end

Versions of halign and valign with the invariant about list length encoded into the types.

package textutils_kernel