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|
open StdLabels
open Js_of_ocaml
open Brr
open Note
open Brr_note
module Printer = Css_lib.Print
let min = Printer.minify_printer
type file =
{ file : File.t
; css : Css.Types.Stylesheet.t option
}
type state =
{ files : file Js.js_array Js.t
; result_css : Css.Types.Stylesheet.t option
; elements : int
}
let init =
{ files = new%js Js.array_empty
; result_css = None
; elements = 0 }
let build_result
: file Js.js_array Js.t -> Css.Types.Stylesheet.t option
= fun documents ->
let merge_result = documents##reduce_init
(Js.wrap_callback @@
(fun acc v _idx _arr ->
match acc, v.css with
| None, None -> None
| None, Some css -> Some (Css_lib.Merge.(add_css empty css))
| Some res, Some css -> Some (Css_lib.Merge.(add_css res css ))
| v, None -> v ))
None in
Option.map
Css_lib.Merge.extract_css
merge_result
module type Handler = sig
type t
val apply: t -> state -> state
end
type event = E : 'a * (module Handler with type t = 'a) -> event
module AddFile = struct
type t = file
let apply file state =
let _ = state.files##push file in
let elements = state.files##.length
and result_css = build_result state.files in
{ state with elements ; result_css }
end
module DelFile = struct
type t = File.t
let apply file state =
let files = state.files##filter
(Js.wrap_callback @@ (fun elt _ _ -> Js.bool (elt.file != file))) in
let elements = files##.length
and result_css = build_result files in
{ files ; elements ; result_css }
end
let do_action
: (event, state) Application.t
= fun (E (t, (module Handler))) state ->
Handler.apply t state
type file_event = event S.t
(** Read the content from the file *)
let file_loader
: file E.send -> File.t -> unit
= fun event file ->
let blob = File.as_blob file in
Fut.await
(Blob.text blob)
(Result.iter
(fun content ->
let str_content = Jstr.to_string content in
let css = try
Some (Css.Parser.parse_stylesheet str_content)
with
| _ -> None
in
event {file; css} ))
let header =
let button =
El.span
[ El.txt' "Retirer" ] in
El.set_inline_style
(Jstr.v "float")
(Jstr.v "right")
button;
let block =
El.div
[ El.span [El.txt' "Fichier"]
; button ]
in
El.set_inline_style
(El.Style.display)
(Jstr.v "block")
block;
block
let file_list
: event E.send -> file -> El.t
= fun sender f ->
let icon =
El.i []
~at:At.[ class' (Jstr.v "fas")
; class' (Jstr.v "fa-check") ] in
let button =
El.i []
~at:At.[ class' (Jstr.v "fas")
; class' (Jstr.v "fa-times-circle") ] in
El.set_inline_style
(Jstr.v "float")
(Jstr.v "right")
button;
Ev.listen
Ev.click
(fun _ -> sender (
E( f.file
, (module DelFile : Handler with type t = DelFile.t))))
(El.as_target button);
match f.css with
(* A css exists, add the icon element *)
| Some _ ->
El.div
[ El.txt (File.name f.file)
; icon
; button ]
| None ->
El.div
[ El.txt (File.name f.file)
; button ]
let buttons:
state -> on_change:(Brr.File.t list -> unit) -> El.t list
= fun state ~on_change ->
let _ = state in
(* The input file can't be styled we hide it and use a click forwarding
button instead. *)
let i = El.input ()
~at:[ At.type' (Jstr.v "file")
; (At.v (Jstr.v "accept")) (Jstr.v ".css")
] in
El.set_inline_style El.Style.display (Jstr.v "none") i;
let b = El.button [ El.txt' "Ajouter un fichier…" ]
~at:[ At.class' (Jstr.v "button")] in
let d = El.button [ El.txt' "Télécharger" ]
~at:[ At.class' (Jstr.v "button")] in
Ev.listen Ev.click (fun _e -> El.click i) (El.as_target b);
Ev.listen Ev.change (fun _e -> on_change (El.Input.files i)) (El.as_target i);
Ev.listen Ev.click (fun _ ->
match state.result_css with
| None -> ()
| Some result ->
let formatter = Format.str_formatter in
Css_lib.Print.(css minify_printer formatter result);
let content = Format.flush_str_formatter () in
Elements.Transfert.send
~mime_type:(Jstr.v "text/css")
~filename:(Jstr.v "result.css")
(Jstr.v content)
)
(El.as_target d);
let has_css = state.files##some
(Js.wrap_callback (fun elem _idx _arr -> Js.bool (elem.css != None))) in
match Js.to_bool has_css with
| true -> [i; b; d]
| false -> [i; b]
let display_content css =
match css with
| None -> []
| Some result ->
let formatter = Format.str_formatter in
Css_lib.Print.(css pretty_printer formatter result);
let content = Format.flush_str_formatter () in
let area =
El.textarea
[ El.txt' content ] in
El.set_inline_style
(Jstr.v "width")
(Jstr.v "100%")
area;
El.set_inline_style
(Jstr.v "height")
(Jstr.v "200px")
area;
El.set_inline_style
(Jstr.v "max-height")
(Jstr.v "50vh")
area;
El.set_inline_style
(Jstr.v "resize")
(Jstr.v "none")
area;
[ El.h2 [ El.txt' "Prévisualisation"]
; area ]
let main id =
match (Jv.is_none id) with
| true -> Console.(error [str "No element with id '%s' found"; id])
| false ->
let elements = El.div [] in
let add_file_event, add_file_sender = Note.E.create () in
let del_file_event, del_file_sender = Note.E.create () in
let state =
Application.run
do_action
init
(E.select
[ E.map (fun f ->
E ( f
, (module AddFile: Handler with type t = AddFile.t )))
add_file_event
; del_file_event
])
in
let _ = Elr.def_children
elements
(S.map (fun state ->
let elements =
Jv.to_list
(fun x -> file_list del_file_sender (Jv.Id.of_jv x))
(Jv.Id.to_jv state.files) in
match elements with
| [] -> display_content state.result_css
| _ ->
List.append
(header::elements)
(display_content state.result_css)
)
state) in
let on_change files = file_loader add_file_sender (List.hd files) in
let header = El.span [] in
Elr.def_children
header
(S.map (fun state ->
buttons ~on_change state)
state);
El.set_children (Jv.Id.of_jv id) [El.p [header]; elements]
let () =
let open Jv in
let main = obj
[| "attach", (repr main) |] in
set global "merger" main
|