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|
open StdLabels
open Css.Types
module AtRule = Map.Make(struct
type t = string * (Component_value.t list)
let compare at1 at2 =
let cmp = String.compare (fst at1) (fst at2) in
if cmp <> 0 then cmp
else
Comparator.compare_list (fun l1 l2 ->
Comparator.component_value
(l1, Common.location_none)
(l2, Common.location_none) )
(snd at1)
(snd at2)
end)
type at_type =
| Empty
| Declaration of (Declaration_list.t * Location.t) list
| Stylesheet of (Merge_style.t * ats)
and at_map_content = (Location.t * at_type)
and ats = at_map_content AtRule.t
type t = Merge_style.t * ats
let rec add_brace_block
: Brace_block.t -> Location.t -> at_map_content option -> at_map_content option
= fun block loc value ->
begin match block, value with
(* Empty element, update the existing one if any *)
| Brace_block.Empty, _ ->
Some
( loc
, Empty )
(* New declarationList, juste add it *)
| Brace_block.Declaration_list decls, None ->
Some
( loc
, Declaration [(decls, loc)])
| Brace_block.Declaration_list decls, (Some (loc, Declaration decl2)) ->
Some
( loc
, Declaration (Common.update_declarations
(decls, Common.location_none) decl2 ))
| Brace_block.Stylesheet s, None ->
let eval = add_css (Merge_style.empty, AtRule.empty) s in
Some
( loc
, Stylesheet eval )
| Brace_block.Stylesheet s, Some (loc, Stylesheet css) ->
let eval = add_css css s in
Some
( loc
, Stylesheet eval )
(* Othe cases are not handled *)
| _ -> None
end
(** Add a new @ definition *)
and add_at
: Css.Types.At_rule.t -> ats -> ats
= fun {name; prelude; block; loc} map ->
let prelude = List.map (fst prelude) ~f:fst in
let key = (fst name), prelude in
AtRule.update key
(add_brace_block block loc)
map
and add_css
: t -> Stylesheet.t -> t
= fun (styles, atrules) css ->
List.fold_left (fst css)
~init:(styles, atrules)
~f:(fun (styles, ats)-> function
| Rule.At_rule r -> (styles, add_at r ats)
| Rule.Style_rule r -> (Merge_style.add_style r styles, ats))
(** Helper function for retrieving the location *)
let get_loc
: Rule.t -> Location.t
= function
| Rule.Style_rule t -> t.Style_rule.loc
| Rule.At_rule t -> t.At_rule.loc
let rec extract_at
: ats -> Css.Types.Rule.t Seq.t
= fun map ->
AtRule.to_seq map
|> Seq.map (fun ((name, prelude), (loc, value)) ->
let name = name, loc
and prelude = List.map ~f:(fun x -> x, loc) prelude, loc in
match value with
| Stylesheet css ->
let stylesheet = extract_css css in
let block = Brace_block.Stylesheet stylesheet in
(Rule.At_rule (At_rule.{name; prelude; block; loc}))
| Empty ->
let block = Brace_block.Empty in
(Rule.At_rule (At_rule.{name; prelude; block; loc}))
| Declaration decls ->
let declarations = List.fold_left decls
~init:[]
~f:(fun acc (decl, _) ->
let elems = fst decl in
List.append elems acc) in
let block = Brace_block.Declaration_list (declarations, loc) in
(Rule.At_rule (At_rule.{name; prelude; block; loc})))
and extract_css
: t -> Stylesheet.t
= fun (styles, ats) ->
let arr =
Seq.append
(extract_at ats)
(Merge_style.extract_style styles)
|> Array.of_seq in
(* Sort the declaration in initial ordering (using the location attribute) *)
Array.fast_sort ~cmp:(fun v1 v2 -> Stdlib.compare (get_loc v1) (get_loc v2) ) arr;
(Array.to_list arr, Common.location_none)
let empty
: t
= Merge_style.empty, AtRule.empty
|
