package hardcaml_waveterm
A terminal based digital waveform viewer for Hardcaml
Install
Dune Dependency
Authors
Maintainers
Sources
v0.17.0.tar.gz
sha256=a6780e4310f46cd71ff8a3cdf12bb51afdf0eaea5e84645a148a4ecd0f02920b
doc/src/hardcaml_waveterm.kernel/draw.ml.html
Source file draw.ml
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open Base module Style = struct type colour = | Black | Red | Green | Yellow | Blue | Magenta | Cyan | White [@@deriving sexp_of, compare] type t = { bold : bool ; fg : colour ; bg : colour } [@@deriving sexp_of, compare] let default = { bold = false; fg = White; bg = Black } end type rect = { r : int ; c : int ; w : int ; h : int } [@@deriving sexp_of] type piece = (* lines *) | TL | BR | BL | TR | V | H | T | Tu | C (* full/half blocks *) | F | TH | BH | LH | RH (* quarter blocks *) | QTL | QBR | QBL | QTR [@@deriving sexp_of] (* kinda interesting *) let bars = true let unicode_of_piece = function | TL -> 0x2518 | BR -> 0x250c | BL -> 0x2510 | TR -> 0x2514 | V -> 0x2502 | H -> 0x2500 | T -> 0x252c | Tu -> 0x2534 | C -> 0x253c | F -> if bars then 0x2551 else 0x2588 | TH -> if bars then 0x2568 else 0x2580 | BH -> if bars then 0x2565 else 0x2584 | LH -> 0x258c | RH -> 0x2590 | QTL -> 0x2598 | QBR -> 0x2597 | QBL -> 0x2596 | QTR -> 0x259d ;; module type Primitives = sig type ctx type style val rows : ctx -> int val cols : ctx -> int val get_bounds : ctx -> rect val get_style : Style.t -> style val draw_int : ctx:ctx -> style:style -> bounds:rect -> r:int -> c:int -> int -> unit val get : ctx:ctx -> bounds:rect -> r:int -> c:int -> int * Style.t end module type S = sig type ctx type style val rows : ctx -> int val cols : ctx -> int val get_bounds : ctx -> rect val get_style : Style.t -> style val clear : ctx -> unit val fill : ctx:ctx -> style:style -> bounds:rect -> char -> unit val draw_int : ctx:ctx -> style:style -> bounds:rect -> r:int -> c:int -> int -> unit val draw_piece : ctx:ctx -> style:style -> bounds:rect -> r:int -> c:int -> piece -> unit val draw_char : ctx:ctx -> style:style -> bounds:rect -> r:int -> c:int -> char -> unit val draw_string : ctx:ctx -> style:style -> bounds:rect -> r:int -> c:int -> string -> unit val draw_box : ctx:ctx -> style:style -> bounds:rect -> string -> unit val get : ctx:ctx -> bounds:rect -> r:int -> c:int -> int * Style.t val inv : ctx:ctx -> bounds:rect -> r:int -> c:int -> unit val bold : ctx:ctx -> bounds:rect -> r:int -> c:int -> unit end module Make (B : Primitives) = struct include B let draw_char ~ctx ~style ~bounds ~r ~c ch = draw_int ~ctx ~style ~bounds ~r ~c (Char.to_int ch) ;; let draw_piece ~ctx ~style ~bounds ~r ~c piece = draw_int ~ctx ~style ~bounds ~r ~c (unicode_of_piece piece) ;; let fill ~ctx ~style ~bounds ch = for r = 0 to bounds.h - 1 do for c = 0 to bounds.w - 1 do draw_char ~ctx ~style ~bounds ~r ~c ch done done ;; let clear ctx = let bounds = get_bounds ctx in let style = get_style Style.default in for r = 0 to bounds.h - 1 do for c = 0 to bounds.w - 1 do draw_char ~ctx ~style ~bounds ~r ~c ' ' done done ;; let draw_string ~ctx ~style ~bounds ~r ~c str = for i = 0 to String.length str - 1 do draw_char ~ctx ~style ~bounds ~r ~c:(c + i) str.[i] done ;; let draw_box ~ctx ~style ~bounds label = let w, h = bounds.w, bounds.h in assert (w >= 2 && h >= 2); (* min box size including borders *) draw_piece ~ctx ~style ~bounds ~r:0 ~c:0 BR; draw_piece ~ctx ~style ~bounds ~r:(h - 1) ~c:0 TR; draw_piece ~ctx ~style ~bounds ~r:0 ~c:(w - 1) BL; draw_piece ~ctx ~style ~bounds ~r:(h - 1) ~c:(w - 1) TL; for c = 1 to w - 2 do draw_piece ~ctx ~style ~bounds ~r:0 ~c H done; for c = 1 to w - 2 do draw_piece ~ctx ~style ~bounds ~r:(h - 1) ~c H done; for r = 1 to h - 2 do draw_piece ~ctx ~style ~bounds ~r ~c:0 V done; for r = 1 to h - 2 do draw_piece ~ctx ~style ~bounds ~r ~c:(w - 1) V done; draw_string ~ctx ~style ~bounds:{ bounds with w = w - 1 } ~r:0 ~c:1 label ;; let inv ~ctx ~bounds ~r ~c = try let x, s = get ~ctx ~bounds ~r ~c in let style = get_style Style.{ s with fg = s.bg; bg = s.fg } in draw_int ~ctx ~style ~bounds ~r ~c x with | _ -> () ;; let bold ~ctx ~bounds ~r ~c = try let x, s = get ~ctx ~bounds ~r ~c in let style = get_style Style.{ s with bold = true } in draw_int ~ctx ~style ~bounds ~r ~c x with | _ -> () ;; end module In_memory = struct type point = int * Style.t module Primitives = struct type ctx = point array array type style = Style.t let rows ctx = Array.length ctx let cols ctx = try Array.length ctx.(0) with | _ -> 0 ;; let get_bounds ctx = { r = 0; c = 0; h = rows ctx; w = cols ctx } let get_style s = s let draw_int ~ctx ~style ~bounds ~r ~c i = if r >= 0 && r < bounds.h && c >= 0 && c < bounds.w then ctx.(bounds.r + r).(bounds.c + c) <- i, style ;; let get ~ctx ~bounds ~r ~c = if r >= 0 && r < bounds.h && c >= 0 && c < bounds.w then ctx.(bounds.r + r).(bounds.c + c) else raise (Invalid_argument "Gfx.get: out of bounds") ;; end module Api = Make (Primitives) include Api let init ~rows ~cols = let ch = Char.to_int ' ' in Array.init rows ~f:(fun _ -> Array.init cols ~f:(fun _ -> ch, Style.default)) ;; end
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