1 Text block datatype

8.16.0.1

1 Text block datatype🔗ℹ

struct
(struct tblock (width height baseline lines))
  width : exact-nonnegative-integer?
  height : exact-nonnegative-integer?
  baseline : exact-nonnegative-integer?
  lines : (listof string?)

The tblock structure. Do not use tblock for construction, use lines->tblock or ->tblock instead.

Only the baseline field is mutable.

procedure
(lines->tblock lines
[ #:align align
#:pad-char pad-char
#:baseline baseline]) → tblock?
  lines : (or/c string? (listof string?))
  align : (one-of/c 'left 'center 'right) = 'left
  pad-char : char? = #\space
  baseline : exact-nonnegative-integer? = 0

Returns a new tblock.

procedure
(baseline! t b) → tblock?
t : tblock/any
b : exact-nonnegative-integer?

Sets the baseline of t to b and returns t.

procedure
(tblock/any x) → boolean?
x : any/c

A fake contract equivalent to any/c. Used as a placeholder to indicate that the corresponding argument is turned into a tblock using ->tblock.

procedure
(->tblock x) → tblock?
x : tblock/any

Returns x if it is already a tblock?, otherwise returns a new tblock by turning x into a string first using ~a.

1	Text block datatype
2	Text block combiners and basic operations
3	Text block: text and string utilities
4	Text block: maths and formulas
5	Text block: Unicode symbols