66 lines
1.8 KiB
OCaml
66 lines
1.8 KiB
OCaml
open Types
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open Array
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(* TODO: implement this so cli can use a dsl to specify colourising patterns *)
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type culr = { colours : colour array; sz : int; mutable current : int }
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module Culriser = struct
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type filter = (colour -> bool) list
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type sort = int array
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let run_filters (f : filter) el =
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List.fold_left (fun res filt -> if not (filt el) then false else res) true f
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let create ?(filters = []) (c : colour array) =
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let ( @ ) = append in
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let colours =
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if List.length filters > 0 then
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fold_left
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(fun acc el -> if run_filters filters el then acc @ [| el |] else acc)
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[||] c
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else c
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in
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{ colours; sz = length colours; current = 0 }
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let current t = t.colours.(t.current)
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let next t =
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let ret = t.current and nv = t.current + 1 in
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if nv >= t.sz then t.current <- 0 else t.current <- nv;
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t.colours.(ret)
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let reset t = t.current <- 0
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let serialise_with_colour t serialiser chunk =
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(match chunk with
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| Separator _ -> Emitter.serialise serialiser (Ansi [ Fg (next t) ])
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| Delimiter _ ->
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reset t;
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Emitter.serialise serialiser (Ansi [ Fg (next t) ])
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| _ -> ());
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Emitter.serialise serialiser chunk
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end
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let ansi_filter t s =
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s |> function
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| Ansi a -> (
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let open List in
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let ol = length a
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and result =
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a
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|> filter (function Fg _ | Bg _ -> false | _ -> true)
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|> fold_left
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(fun acc el ->
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if el = Reset then acc @ [ el; Fg (Culriser.current t) ]
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else acc @ [ el ])
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[]
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in
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let rl = length result in
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match (rl, ol) with
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(* empty ansi code is equivalent to a reset *)
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| 0, 0 -> Ansi [ Reset; Fg (Culriser.current t) ]
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(* if we filtered everything out of it produce no tokens *)
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| 0, _ -> Empty
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| _, _ -> Ansi result)
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| n -> n
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