package toffee

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Source file dimension.ml

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type t = Compact_length.t

(* Constructors *)

let length value = Compact_length.length value
let percent value = Compact_length.percent value
let auto = Compact_length.auto
let calc index = Compact_length.calc index
let px value = length value
let pct value = percent (value /. 100.0)

(* Constants *)

let zero = Compact_length.zero

(* Inspection *)

let is_length t = Compact_length.is_length t
let is_percent t = Compact_length.is_percent t
let is_auto t = Compact_length.is_auto t
let is_calc t = Compact_length.is_calc t

(* Value extraction *)

let value t = Compact_length.value t

(* Get length value if this is a length, None otherwise *)

let to_option t = if is_length t then Some (value t) else None

(* Pretty printing *)

let to_string = Compact_length.to_string

(* Comparison *)

let equal = Compact_length.equal
let compare = Compact_length.compare
let pp = Compact_length.pp

(* Additional helpers *)

let is_zero t = Compact_length.is_zero t
let uses_percentage t = Compact_length.uses_percentage t

let resolved_percentage_size t parent_size =
  Compact_length.resolved_percentage_size t parent_size

let resolved_percentage_size_with_calc t parent_size calc_resolver =
  Compact_length.resolved_percentage_size_with_calc t parent_size calc_resolver

(* Resolve functions from Taffy's resolve.rs *)

let maybe_resolve t context calc_resolver =
  if is_auto t then None
  else if is_length t then Some (value t)
  else if is_percent t then
    match context with
    | None -> None
    | Some dim ->
        (* Emulate f32 arithmetic to match Taffy's behavior *)
        let result = dim *. value t in
        (* Round to f32 precision *)
        Some (Int32.float_of_bits (Int32.bits_of_float result))
  else if is_calc t then
    match context with
    | None -> None
    | Some dim -> Some (calc_resolver (Compact_length.get_calc_index t) dim)
  else
    failwith
      "Dimension.maybe_resolve: unsupported tag (expected \
       length/percent/auto/calc)"

let resolve_or_zero t context calc_resolver =
  match maybe_resolve t context calc_resolver with Some v -> v | None -> 0.0