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open Brr
module PM = Prosemirror
module Js = Js_of_ocaml.Js
(** This is the state for the application *)
type state =
{ editable : bool
; view : PM.View.editor_view Js.t
; last_backup: float
; page_id: Jstr.t option
; window : El.t list
}
type events =
| DeleteEvent
| StoreEvent
| LoadEvent of Jstr.t option
| AddEvent
| CloseEvent of Forms.Events.kind option
let set_title
: Storage.content Js.t -> unit
= fun content ->
let title =
Js.Opt.get
content##.title
(fun () -> Jstr.empty) in
let title_element = Document.find_el_by_id G.document (Jstr.v "title") in
Option.iter
(fun el -> El.set_prop (El.Prop.value) title el)
title_element
let key_of_title
: Jstr.t -> Jstr.t
= fun title ->
title
let state_of_storage
: PM.t -> Storage.content Js.t -> PM.Model.schema Js.t -> PM.State.editor_state Js.t
= fun pm content schema ->
Js.Opt.case
content##.content
(fun () ->
let obj = PM.State.creation_prop () in
obj##.plugins := Plugins.default pm schema;
obj##.schema := Js.some schema;
PM.State.create pm obj)
(fun page_content ->
let obj = PM.State.configuration_prop () in
obj##.plugins := Plugins.default pm schema;
obj##.schema := Js.some schema;
PM.State.fromJSON pm obj page_content)
(** Create a new editor view
[build_view element state] will create the editor and attach it to [element].
*)
let build_view
: PM.t -> Jstr.t option -> El.t -> PM.View.editor_view Js.t * float
= fun pm page_id editor ->
(* Remove all the elements if any *)
El.set_children editor [];
(* TODO
This could be improved, instead of creating a new schema, just fetch
the node and marks from the plungin *)
let custom_schema =
Footnotes.footnote_schema
pm
(PM.SchemaBasic.schema pm) in
(* Recreate the full schema by adding all the nodes and marks from the
plugings *)
let specs = PM.Model.schema_spec
(PM.SchemaList.add_list_nodes
pm
(custom_schema##.spec##.nodes)
(Jstr.v "paragraph block*")
(Some (Jstr.v "block")))
(Some custom_schema##.spec##.marks)
None in
let full_schema = PM.Model.schema pm specs in
let stored_content = Storage.load page_id in
(* This variable contains the last update time, either because it is
stored, or because it is the date where we create the first page. *)
let last_backup = Js.Opt.get
stored_content##.date
(fun () -> (new%js Js.date_now)##getTime) in
let props = PM.View.direct_editor_props () in
props##.state := state_of_storage pm stored_content full_schema;
(* Add the custom nodes *)
props##.nodeViews := PM.O.init
[| ( "footnote", (Footnotes.footnote_view pm))
|];
let view = PM.View.editor_view
pm
editor
props in
view, last_backup
let load_page
: PM.t -> Jstr.t option -> state -> Storage.content Js.t -> state
= fun pm page_id state json ->
let editor_state = state_of_storage pm json state.view##.state##.schema in
let () = state.view##updateState editor_state
and () = set_title json in
{ state with page_id }
(** [update] is the event loop.
The function take a new event, and apply it to the current state. *)
let update
: PM.t -> 'a option Note.E.send -> (events, state) Application.t
= fun pm close_sender event state ->
match event with
| AddEvent ->
let title = Jstr.v "Nouvelle page" in
let popup = Ui.popup
~title
~form:(Some (Forms.Add_page.create ()))
close_sender in
{ state with window = popup::state.window}
| DeleteEvent ->
begin match state.page_id with
| None -> state
| Some page_id ->
let title = Jstr.v "Confirmation" in
let popup = Ui.popup
~title
~form:(Some (Forms.Delete_page.create page_id))
close_sender in
{ state with window = popup::state.window}
end
| CloseEvent res ->
let state = match state.window with
| [] -> { state with window = [] }
| el::tl -> El.remove el
; { state with window = tl } in
(* The actions is confirmed by the user. Handle the form result *)
begin match res with
(* Delete the current page, then load the home page *)
| Some (Forms.Delete_page.DeletePage id) ->
Storage.delete (fun () -> Some id);
let json = Storage.load None in
load_page pm None state json
(* Add a new page *)
| Some (Forms.Add_page.AddPage {title}) ->
let page_id = key_of_title title in
Console.(log [title]);
let new_date = (new%js Js.date_now)##getTime in
let content_obj = object%js
val content = Js.null
val title = Js.some title
val date = Js.some new_date
end in
load_page pm (Some page_id) state content_obj
| _ -> state
end
| StoreEvent ->
let title_element = Document.find_el_by_id G.document (Jstr.v "title") in
let content = Option.map
(fun el -> El.prop (El.Prop.value) el)
title_element in
let new_date = (new%js Js.date_now)##getTime in
let content_obj = object%js
val content = Js.some @@ Jv.Id.to_jv (state.view##.state##toJSON ())
val title = Js.Opt.option content
val date = Js.some new_date
end in
let save = Storage.save
content_obj
state.page_id
~check:(fun previous_state ->
Js.Opt.case previous_state##.date
(fun () -> true)
(fun date ->
(* I do not figure how the previous date could be older
than the last backup. It could be either :
- equal (if we are the only one to update it)
- more recent (if the content has been updated elsewhere)
but older shoud be a bug. *)
date <= state.last_backup)) in
begin match save with
| Ok true -> { state with last_backup = new_date }
| _ ->
(* TODO In case of error, notify the user *)
state
end
| LoadEvent page_id ->
let json = Storage.load page_id in
load_page pm page_id state json
let app id content =
(* Check the pre-requisite *)
let events_opt = Actions.populate_menu () in
match (Jv.is_none id), (Jv.is_none content), events_opt with
| false, false, Some btn_events ->
let pm = PM.v () in
let editor:El.t = Jv.Id.of_jv id in
(* Load the cache for the given page *)
let page_id = Storage.page_id () in
let view, last_backup = build_view pm page_id editor in
(* This event is used in the pop process. The sender is given to the
subroutine in order to track the window closing *)
let event, sender = Note.E.create () in
let _ = sender in
let init_state =
{ editable = true
; view
; last_backup
; page_id
; window = []
}
in
let app_state = Application.run
(update pm sender)
init_state
(Note.E.select
[ Note.E.map (fun () -> DeleteEvent) btn_events.Actions.delete
; Brr_note.Evr.on_el Ev.focusout (fun _ -> StoreEvent) editor
; Note.E.map (fun v -> LoadEvent v) btn_events.Actions.redirect
; Note.E.map (fun () -> AddEvent) btn_events.Actions.add
; Note.E.map (fun v -> CloseEvent v) event
]) in
let () =
Note.S.log app_state (fun _ -> ())
|> Note.Logr.hold in
()
| _, _, _ ->
Console.(error [str "No element with id '%s' '%s' found"; id ; content])
let () =
let open Jv in
let editor = obj
[| "attach_prosemirror", (repr app)
|] in
set global "editor" editor
|