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(* Copyright (c) 2016-2017 David Kaloper Meršinjak. All rights reserved.
See LICENSE.md. *)
open Notty
open Notty.Infix
let pow n e = int_of_float (float n ** float e)
module List = struct
include List
let rec replicate n a = if n < 1 then [] else a :: replicate (n - 1) a
let rec range a b = if a > b then [] else a :: range (a + 1) b
let rec intersperse a = function
| ([] | [ _ ]) as t -> t
| x :: xs -> x :: a :: intersperse a xs
let rec take n = function
| x :: xs when n > 0 -> x :: take (pred n) xs
| _ -> []
let rec splitat n = function
| x :: xs when n > 0 ->
let a, b = splitat (pred n) xs in
x :: a, b
| xs -> [], xs
let rec chunks n xs =
match splitat n xs with
| a, [] -> [ a ]
| a, b -> a :: chunks n b
let rec zip xs ys =
match xs, ys with
| [], _ | _, [] -> []
| x :: xs, y :: ys -> (x, y) :: zip xs ys
end
module String = struct
include String
let repeat n str =
let b = Buffer.create 16 in
for _ = 1 to n do
Buffer.add_string b str
done;
Buffer.contents b
end
let tile w h i = I.tabulate w h (fun _ _ -> i)
(** A few images used in several places. *)
module Images = struct
let i1 =
I.(string A.(fg lightblack) "omgbbq" <-> string A.(fg white ++ bg red) "@")
<|> I.(pad ~t:2 @@ string A.(fg green) "xo")
let i2 = I.(hpad 1 1 (hcrop 1 1 @@ tile 3 3 i1) <|> i1)
let i3 = tile 5 5 i2
let i4 =
let i = I.(i3 <|> crop ~t:1 i3 <|> i3) in
I.(crop ~l:1 i <-> crop ~r:1 i <-> crop ~b:2 i)
let i5 = tile 5 1 List.(range 0 15 |> map (fun i -> I.pad ~t:i ~l:(i * 2) i2) |> I.zcat)
let c_gray_ramp = I.tabulate 24 1 (fun g _ -> I.string A.(bg (gray g)) " ")
let c_cube_ix =
I.tabulate 6 1
@@ fun r _ ->
I.hpad 0 1 @@ I.tabulate 6 6 @@ fun b g -> I.string A.(bg (rgb ~r ~g ~b)) " "
let c_cube_rgb =
let f x = [| 0x00; 0x5f; 0x87; 0xaf; 0xd7; 0xff |].(x) in
I.tabulate 6 1
@@ fun r _ ->
I.hpad 0 1
@@ I.tabulate 6 6
@@ fun b g -> I.string A.(bg (rgb_888 ~r:(f r) ~g:(f g) ~b:(f b))) " "
let c_rainbow w h =
let pi2 = 2. *. 3.14159 in
let pi2_3 = pi2 /. 3.
and f t off = (sin (t +. off) *. 128.) +. 128. |> truncate in
let color t = A.rgb_888 ~r:(f t (-.pi2_3)) ~g:(f t 0.) ~b:(f t pi2_3) in
I.tabulate (w - 1) 1
@@ fun x _ ->
let t = (pi2 *. float x /. float w) +. 3.7 in
I.char A.(bg (color t)) ' ' 1 h
(* U+25CF BLACK CIRCLE *)
let dot color = I.string (A.fg color) "●"
(* U+25AA BLACK SMALL SQUARE *)
let square color = I.string (A.fg color) "▪"
let rec cantor = function
| 0 -> square A.lightblue
| n ->
let sub = cantor (pred n) in
I.hcat (List.replicate (pow 3 n) (square A.lightblue))
<-> (sub <|> I.void (pow 3 (n - 1)) 0 <|> sub)
let checker n m i =
let w = I.width i in
I.(tile (n / 2) (m / 2) (hpad 0 w i <-> hpad w 0 i))
let checker1 = checker 20 20 I.(char A.(bg magenta) ' ' 2 1)
let rec sierp c n =
I.(
if n > 1
then (
let ss = sierp c (pred n) in
ss <-> (ss <|> ss))
else hpad 1 0 (square c))
let grid xxs = xxs |> List.map I.hcat |> I.vcat
let outline attr i =
let w, h = I.(width i, height i) in
let chr x = I.uchar attr (Uchar.of_int x) 1 1
and hbar = I.uchar attr (Uchar.of_int 0x2500) w 1
and vbar = I.uchar attr (Uchar.of_int 0x2502) 1 h in
let a, b, c, d = chr 0x256d, chr 0x256e, chr 0x256f, chr 0x2570 in
grid [ [ a; hbar; b ]; [ vbar; i; vbar ]; [ d; hbar; c ] ]
end
let halfblock = "▄"
let pxmatrix w h f =
I.tabulate w h
@@ fun x y ->
let y = y * 2 in
I.string A.(bg (f x y) ++ fg (f x (y + 1))) halfblock
module Term = Notty_unix.Term
let simpleterm ~imgf ~f ~s =
let term = Term.create () in
let imgf (w, h) s = I.(string A.(fg lightblack) "[ESC quits.]" <-> imgf (w, h - 1) s) in
let rec go s =
Term.image term (imgf (Term.size term) s);
match Term.event term with
| `End | `Key (`Escape, []) | `Key (`ASCII 'C', [ `Ctrl ]) -> ()
| `Resize _ -> go s
| #Unescape.event as e ->
(match f s e with
| Some s -> go s
| _ -> ())
in
go s
|