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open Js_of_ocaml
open Brr
module PM = Prosemirror

let prosemirror id content =
  begin match (Jv.is_none id), (Jv.is_none content) with
    | false, false ->

      let module PM = Prosemirror in
      let pm = PM.v () in

      let schema = (PM.SchemaBasic.schema pm) in
      let schema = Footnotes.footnote_schema pm schema in

      let specs = PM.Model.schema_spec
          (PM.SchemaList.add_list_nodes
             pm
             (schema##.spec##.nodes)
             (Jstr.v "paragraph block*")
             (Some (Jstr.v "block")))
          (Some schema##.spec##.marks)
          None in
      let mySchema = PM.Model.schema pm specs in

      (* Create the initial state *)
      let state = Storage.load pm mySchema content in

      let props = PM.View.direct_editor_props () in
      props##.state := state;

      (* Each time the state is update, handle the copy *)
      props##.dispatchTransaction := Js.wrap_meth_callback @@ (fun view tr ->
          let state = view##.state##apply tr in
          view##updateState state
        );

      let view' = (Footnotes.footnote_view pm) in

      let nodes = PM.O.init
          [| ("footnote", view')  |] in
      props##.nodeViews := nodes;
      let view = PM.View.editor_view
          pm
          (Jv.Id.of_jv id)
          props in

      (* Attach an event on focus out *)
      let _ = Brr_note.Evr.on_el
          (Ev.focusout)
          (fun _ -> Storage.save view)
          (Jv.Id.of_jv id) in

      ()

    | _, _ -> Console.(error [str "No element with id '%s' '%s' found"; id ; content])

  end

let () =

  let open Jv in
  let editor = obj
      [| "attach_prosemirror", (repr prosemirror)
      |] in

  set global "editor" editor