printbox 0.2 · OCaml Package

Pretty-Printing of nested Boxes

Allows to print nested boxes, lists, arrays, tables in a nice way on any monospaced support.

 # let b = PrintBox.(
     frame
       (vlist [ line "hello";
                hlist [line "world"; line "yolo"]])
   );;
 val b : t = <abstr>

 # PrintBox.output ~indent:2 stdout b;;
 +----------+
 |hello     |
 |----------|
 |world|yolo|
 +----------+
 - : unit = ()

 # let b2 = PrintBox.(
     frame
       (hlist [ text "I love\nto\npress\nenter";
                grid_text [| [|"a"; "bbb"|];
                             [|"c"; "hello world"|] |]])
   );;
 val b2 : PrintBox.t = <abstr>

 # PrintBox.output stdout b2;;
 +--------------------+
 |I love|a|bbb        |
 |to    |-+-----------|
 |press |c|hello world|
 |enter | |           |
 +--------------------+

- : unit = ()

type position = {

x : int;
y : int;

}

Positions are relative to the upper-left corner, that is, when x increases we go toward the right, and when y increases we go toward the bottom (same order as a printer)

Box Combinators

type t

type view = private

| Empty
| Text of string list
| Frame of t
| Pad of position * t
| Grid of [ `Bars | `None ] * t array array
| Tree of int * t * t array

The type t is now opaque

since 0.2 .

The type view can be used to observe the inside of the box.

val view : t -> view

Observe the content of the box.

since 0.2

A box, either empty, containing directly text, or a table or tree of sub-boxes

val empty : t

Empty box, of size 0

val line : string -> t

Make a single-line box.

raises Invalid_argument
if the string contains '\n'

val text : string -> t

Any text, possibly with several lines

val sprintf : ('a, Buffer.t, unit, t) format4 -> 'a

Formatting for text

val asprintf : ('a, Format.formatter, unit, t) format4 -> 'a

Formatting for text.

since 0.2

val lines : string list -> t

Shortcut for text, with a list of lines. lines l is the same as text (String.concat "\n" l).

val int_ : int -> t

val bool_ : bool -> t

val float_ : float -> t

val int : int -> t

since 0.2

val bool : bool -> t

since 0.2

val float : float -> t

since 0.2

val frame : t -> t

Put a single frame around the box

val pad : t -> t

Pad the given box with some free space

val pad' : col:int -> lines:int -> t -> t

Pad with the given number of free cells for lines and columns

val vpad : int -> t -> t

Pad vertically

val hpad : int -> t -> t

Pad horizontally

val grid : ?pad:(t -> t) -> ?bars:bool -> t array array -> t

Grid of boxes (no frame between boxes). The matrix is indexed with lines first, then columns. The array must be a proper matrix, that is, all lines must have the same number of columns!

parameter framed
if true, each item of the grid will be framed. default value is true

val grid_text : ?pad:(t -> t) -> ?bars:bool -> string array array -> t

Same as grid, but wraps every cell into a text box

val transpose : 'a array array -> 'a array array

Transpose a matrix

val init_grid : 
  ?bars:bool ->
  line:int ->
  col:int ->
  (line:int -> col:int -> t) ->
  t

Same as grid but takes the matrix as a function

val vlist : ?pad:(t -> t) -> ?bars:bool -> t list -> t

Vertical list of boxes

val hlist : ?pad:(t -> t) -> ?bars:bool -> t list -> t

Horizontal list of boxes

val grid_map : ?bars:bool -> ('a -> t) -> 'a array array -> t

val vlist_map : ?bars:bool -> ('a -> t) -> 'a list -> t

val hlist_map : ?bars:bool -> ('a -> t) -> 'a list -> t

val tree : ?indent:int -> t -> t list -> t

Tree structure, with a node label and a list of children nodes

val mk_tree : ?indent:int -> ('a -> t * 'a list) -> 'a -> t

Definition of a tree with a local function that maps nodes to their content and children

Simple Structural Interface

type 'a ktree = unit -> [ `Nil | `Node of 'a * 'a ktree list ]

type box = t

module Simple : sig ... end

package printbox

Pretty-Printing of nested Boxes

Box Combinators

Simple Structural Interface