1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
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
}
type events =
| DeleteEvent
| StoreEvent
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
: El.t -> PM.View.editor_view Js.t * float
= fun editor ->
let pm = PM.v () in
(* 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
(* Load the cache for the given page *)
let stored_content = Storage.load Storage.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
(** [update] is the event loop.
The function take a new event, and apply it to the current state. *)
let update
: (events, state) Application.t
= fun event state ->
match event with
| DeleteEvent ->
state
| StoreEvent ->
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.null
val date = Js.some new_date
end in
let save = Storage.save
content_obj
Storage.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 }
| _ -> state
end
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 editor:El.t = Jv.Id.of_jv id in
let view, last_backup = build_view editor in
let init_state =
{ editable = true
; view
; last_backup
}
in
let app_state = Application.run
update
init_state
(Note.E.select
[ Note.E.map (fun () -> DeleteEvent) (snd btn_events.Actions.delete)
; Brr_note.Evr.on_el Ev.focusout (fun _ -> StoreEvent) editor
]) 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
|