Source file bonsai_web_ui_auto_generated.ml
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open! Core
open! Bonsai_web
open Bonsai.Let_syntax
module N = Vdom.Node
module A = Vdom.Attr
module Form = Bonsai_web_ui_form
module E = Form.Elements
module type S = sig
type t [@@deriving sexp, sexp_grammar]
end
type form_transformer =
Sexp_grammar.grammar Sexp_grammar.with_tag Value.t
-> recurse:(Sexp_grammar.grammar Value.t -> Sexp.t Form.t Computation.t)
-> Sexp.t Form.t Computation.t
let error_hint form =
let%sub form = form in
Form.Dynamic.error_hint form
;;
module Customization = struct
type 'a t =
{ apply_to_tag : key:string -> value:Sexp.t -> bool
; on_match : 'a
}
let create_for_view ~apply_to_tag on_match = { apply_to_tag; on_match }
let transform_form'
(type a)
(module M : Sexpable with type t = a)
~apply_to_tag
(on_match :
Sexp_grammar.grammar Sexp_grammar.with_tag Value.t
-> recurse:(Sexp_grammar.grammar Value.t -> Sexp.t Form.t Computation.t)
-> a Form.t Computation.t)
=
let transform grammar ~recurse =
let%map.Computation on_match = on_match grammar ~recurse in
Form.project on_match ~parse_exn:[%sexp_of: M.t] ~unparse:[%of_sexp: M.t]
in
{ apply_to_tag; on_match = transform }
;;
let transform_form
~apply_to_tag
(on_match :
Sexp_grammar.grammar Sexp_grammar.with_tag Value.t
-> recurse:(Sexp_grammar.grammar Value.t -> Sexp.t Form.t Computation.t)
-> Sexp.t Form.t Computation.t)
=
transform_form' (module Sexp) ~apply_to_tag on_match
;;
let constant_form
(type a)
(module M : Sexpable with type t = a)
~apply_to_tag
(on_match : a Form.t Computation.t)
=
transform_form' (module M) ~apply_to_tag (fun _ ~recurse:_ -> on_match)
;;
let applies t (with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag) =
t.apply_to_tag ~key:with_tag.key ~value:with_tag.value
;;
let apply_if_name_matches t (with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag) =
Option.some_if (applies t with_tag) t.on_match
;;
let apply t (with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag Value.t) =
t.on_match with_tag
;;
module Defaults = struct
module Form = struct
let transform_key_data_pair
(with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag Value.t)
~recurse
=
let%sub grammar =
let%arr with_tag = with_tag in
with_tag.grammar
in
match%sub grammar with
| List (Many (List (Cons (first, Cons (second, Empty))))) ->
let pair_form =
let%sub first =
error_hint
(let%sub form = recurse first in
let%arr form = form in
let view = Form.View.set_label (Vdom.Node.text "Key") (Form.view form) in
Form.Expert.create ~view ~value:(Form.value form) ~set:(Form.set form))
in
let%sub second =
error_hint
(let%sub form = recurse second in
let%arr form = form in
let view =
Form.View.set_label (Vdom.Node.text "Data") (Form.view form)
in
Form.Expert.create ~view ~value:(Form.value form) ~set:(Form.set form))
in
let%arr first = first
and second = second in
let view = Form.View.tuple [ Form.view first; Form.view second ] in
let value =
match Or_error.both (Form.value first) (Form.value second) with
| Ok (first, second) -> Ok (Sexp.List [ first; second ])
| Error _ as err -> err
in
let set = function
| Sexp.List [ first_val; second_val ] ->
Effect.Many [ Form.set first first_val; Form.set second second_val ]
| _ -> Effect.Ignore
in
Form.Expert.create ~view ~value ~set
in
Computation.map
(Form.Elements.Multiple.list pair_form)
~f:
(Form.project
~parse_exn:(fun l -> Sexp.List l)
~unparse:(function
| Sexp.List l -> l
| Sexp.Atom _ -> []))
| _ -> recurse grammar
;;
let assoc_key_value_labels =
transform_form
~apply_to_tag:(fun ~key ~value:_ ->
String.equal key Sexplib0.Sexp_grammar.assoc_tag)
transform_key_data_pair
;;
let transform_multiple_button_name
(with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag Value.t)
~(recurse : Sexp_grammar.grammar Value.t -> Sexp.t Form.t Computation.t)
=
let%sub { grammar; value; key = _ } = return with_tag in
let%sub form = recurse grammar in
let%sub text =
match%arr value with
| Sexp.Atom s -> s
| value -> Sexp.to_string_hum value
in
let%arr form = form
and text = text in
let view =
let view = Form.view form in
match view.view with
| List ({ append_item = Append_info { append; text = None }; _ } as t) ->
{ view with
view =
List { t with append_item = Append_info { append; text = Some text } }
}
| List { append_item = Append_view _; _ }
| List { append_item = Append_info { text = Some _; _ }; _ }
| Empty | Collapsible _ | Raw _ | Record _ | Variant _ | Tuple _ | Option _ ->
view
in
Form.Expert.create ~value:(Form.value form) ~set:(Form.set form) ~view
;;
let transform_multiple_button_name =
transform_form
~apply_to_tag:(fun ~key ~value:_ -> String.equal key "grammar.add_element_text")
transform_multiple_button_name
;;
let nice_time_ns =
constant_form
(module Time_ns.Alternate_sexp)
~apply_to_tag:(fun ~key ~value ->
String.equal key Sexplib0.Sexp_grammar.type_name_tag
&& Sexp.equal value ([%sexp_of: string] "Core.Time_ns.Alternate_sexp.t"))
(Form.Elements.Date_time.datetime_local ())
;;
let nice_time_of_day =
constant_form
(module Time_ns.Ofday)
~apply_to_tag:(fun ~key ~value ->
String.equal key Sexplib0.Sexp_grammar.type_name_tag
&& Sexp.equal value ([%sexp_of: string] "Core.Time_ns.Ofday.t"))
(Form.Elements.Date_time.time ())
;;
let nice_date =
constant_form
(module Date)
~apply_to_tag:(fun ~key ~value ->
String.equal key Sexplib0.Sexp_grammar.type_name_tag
&& Sexp.equal value ([%sexp_of: string] "Core.Date.t"))
(Form.Elements.Date_time.date ())
;;
let all =
[ assoc_key_value_labels
; nice_time_ns
; nice_time_of_day
; nice_date
; transform_multiple_button_name
]
;;
end
end
end
module Style =
[%css
stylesheet
{|
.with_whitespace {
white-space: pre-wrap;
}
.record_field_name {
font-weight: bold;
}
.error {
font-weight: bold;
border: solid 2px red
}
.override_showing {
color: black;
}
.override_hidden {
color: gray;
}
.override_text {
text-align: center;
font-weight: bold;
cursor: pointer;
}
pre {
margin: 0;
}
|}]
let error_box message = N.pre ~attrs:[ Style.error ] [ N.text message ]
let print_the_atom ~monospaced = function
| Sexp.Atom a ->
if monospaced
then N.pre [ N.text a ]
else N.span ~attrs:[ Style.with_whitespace ] [ N.text a ]
| sexp ->
error_box [%string "Error printing atom. Expected atom, but got: %{sexp#Sexp}"]
;;
let view grammar ~customizations =
let rec view_grammar (grammar : Sexp_grammar.grammar)
: Sexp.t Value.t -> Vdom.Node.t Computation.t
=
match Sexp_grammar.Unroll_recursion.of_grammar_exn grammar with
| Bool | String -> Bonsai.pure (print_the_atom ~monospaced:false)
| Integer | Char | Float -> Bonsai.pure (print_the_atom ~monospaced:true)
| Option g ->
let view = view_grammar g in
(function%sub
| List [] | Atom "None" | Atom "none" -> Bonsai.const (N.pre [ N.text "None" ])
| List [ a ] | List [ Atom ("Some" | "some"); a ] -> view a
| other ->
let%arr other = other in
error_box
[%string "Expected a sexp representing an option, but got: %{other#Sexp}"])
| List l ->
let view_list = view_list_grammar l in
let list_kind =
match l with
| Fields _ -> N.ul
| _ -> N.ol
in
fun s ->
(match%map.Computation view_list s with
| [] -> N.pre [ N.text "[]" ]
| all -> list_kind (List.map all ~f:(fun a -> N.li [ a ])))
| Lazy g -> fun s -> Bonsai.lazy_ (Lazy.map g ~f:(fun g -> view_grammar g s))
| Tagged with_tag -> view_with_tag view_grammar with_tag
| Variant { case_sensitivity = _; clauses = [] } -> fun _ -> Bonsai.const N.none
| Variant { case_sensitivity; clauses } -> view_clauses case_sensitivity clauses
| Union [] -> fun _ -> Bonsai.const N.none
| Any _ | Union _ -> Bonsai.pure N.sexp_for_debugging
| Tyvar _ | Tycon _ | Recursive _ -> assert false
and view_fields ({ fields; } : Sexp_grammar.record) sexp =
let fields_map =
fields
|> List.map ~f:Grammar_helper.Tags.strip_tags
|> List.map ~f:(fun { name; required; args } -> name, (required, args))
|> String.Map.of_alist_exn
in
let original_field_order =
fields
|> List.map ~f:Grammar_helper.Tags.strip_tags
|> List.map ~f:(fun { name; _ } -> name)
in
let%sub sexp_map =
match%arr sexp with
| Sexp.Atom _ -> String.Map.empty
| List fields ->
List.filter_map fields ~f:(function
| List [ Atom name; value ] -> Some (name, Sexp.List [ value ])
| _ -> None)
|> String.Map.of_alist_reduce ~f:(fun _first second ->
second)
in
let%sub map =
Bonsai.assoc
(module String)
sexp_map
~f:(fun field_name field_value ->
let%sub key_opt =
let%arr field_name = field_name in
if Map.mem fields_map field_name then Some field_name else None
in
Bonsai.enum
(module struct
type t = string option [@@deriving sexp, compare, equal]
let all = None :: List.map (Map.keys fields_map) ~f:(fun s -> Some s)
end)
~match_:key_opt
~with_:(function
| None ->
let%arr field_name = field_name
and field_value = field_value in
error_box
[%string
"Grammar has no field named '%{field_name}', but the sexp does, and \
it has value %{field_value#Sexp}"]
| Some field_name ->
let _, grammar = Map.find_exn fields_map field_name in
let%map.Computation all = view_list_grammar grammar field_value in
let all_view =
match all with
| [] -> N.none
| [ single ] -> single
| _ -> all |> List.map ~f:(fun arg -> N.li [ arg ]) |> N.ul
in
N.div
[ N.span ~attrs:[ Style.record_field_name ] [ N.text field_name ]
; N.br ()
; all_view
]))
in
let%sub with_error_messages =
Bonsai.Map.merge map (Value.return fields_map) ~f:(fun ~key -> function
| `Left ->
(match allow_extra_fields with
| false ->
[%string
"Record has an extra field, named '%{key}', which the grammar does not \
allow"]
|> error_box
|> Some
| true -> Some extra_field)
| `Right (required, _) ->
(match required with
| true ->
[%string
"Record is missing a field named '%{key}', which is required by the \
grammar"]
|> error_box
|> Some
| false ->
N.div
[ N.span ~attrs:[ Style.record_field_name ] [ N.text key ]
; N.br ()
; N.pre [ N.text "Non-required field not present" ]
]
|> Some)
| `Both (view, _) -> Some view)
in
let%arr with_error_messages = with_error_messages in
let , original_fields =
List.fold_map original_field_order ~init:with_error_messages ~f:(fun accum field ->
Map.remove accum field, Map.find_exn accum field)
in
original_fields @ Map.data extra_fields
and view_clauses
(case_sensitivity : Sexp_grammar.case_sensitivity)
(clauses : Sexp_grammar.clause Sexp_grammar.with_tag_list list)
=
let normalize_name =
match case_sensitivity with
| Case_insensitive -> String.lowercase
| Case_sensitive -> Fn.id
| Case_sensitive_except_first_character -> String.capitalize
in
let clause_map =
clauses
|> List.map ~f:Grammar_helper.Tags.strip_tags
|> List.map ~f:(fun { name; clause_kind } ->
normalize_name name, view_clause clause_kind)
|> String.Map.of_alist_exn
in
fun sexp ->
let%sub tag, remaining =
match%sub sexp with
| Sexp.Atom s -> return (Value.both s (Value.return (Sexp.List [])))
| List (Atom s :: remaining) ->
let%arr s = s
and remaining = remaining in
s, Sexp.List remaining
| List _ as other ->
let%arr other = other in
raise_s [%message "expected variant, found" (other : Sexp.t)]
in
let%sub tag_to_match_on =
let%arr tag = tag >>| normalize_name in
if Map.mem clause_map tag then Some tag else None
in
let%sub args =
Bonsai.enum
(module struct
type t = string option [@@deriving sexp, compare, equal]
let all = None :: List.map (Map.keys clause_map) ~f:(fun s -> Some s)
end)
~match_:tag_to_match_on
~with_:(function
| None ->
let%arr tag = tag in
let valid_tags = Map.keys clause_map |> String.concat ~sep:", " in
[ error_box
[%string
"The variant constructor '%{tag}' does not exist. Expected one of: \
%{valid_tags} "]
]
| Some k ->
let c = Map.find_exn clause_map k in
c remaining)
in
let%arr tag = tag
and args = args in
match args with
| [] -> N.div [ N.text tag ]
| _ -> N.div [ N.text tag; N.ul (List.map ~f:(fun a -> N.li [ a ]) args) ]
and view_clause (clause : Sexp_grammar.clause_kind)
: Sexp.t Value.t -> N.t list Computation.t
=
match clause with
| Atom_clause -> fun _ -> Bonsai.const []
| List_clause { args } -> fun sexp -> view_list_grammar args sexp
and view_with_tag f with_tag sexp =
match
List.find_map customizations ~f:(fun customization ->
Customization.apply_if_name_matches customization with_tag)
with
| Some custom_view -> custom_view sexp
| None -> f with_tag.grammar sexp
and view_list_grammar
: Sexp_grammar.list_grammar -> Sexp.t Value.t -> Vdom.Node.t list Computation.t
= function
| Empty -> fun _ -> Bonsai.const []
| Cons (g, rest) as cons ->
(function%sub
| List (a :: xs) ->
let xs = Value.map xs ~f:(fun xs -> Sexp.List xs) in
let%map.Computation a = view_grammar g a
and xs = view_list_grammar rest xs in
a :: xs
| List [] ->
Bonsai.lazy_
(lazy
(let cons = [%sexp (cons : Sexp_grammar.list_grammar)] in
[%string
"Encountered empty list sexp when attempting to process the grammar: \
%{cons#Sexp}"]
|> error_box
|> List.return
|> Bonsai.const))
| sexp ->
let%arr sexp = sexp in
[%string
"Encountered malformed sexp when attempting to view list grammar. Expected \
non-empty list, but got %{sexp#Sexp}."]
|> error_box
|> List.return)
| Many g as many ->
(function%sub
| List xs ->
let xs = xs >>| List.mapi ~f:(fun i x -> i, x) >>| Int.Map.of_alist_exn in
let%map.Computation xs =
Bonsai.assoc (module Int) xs ~f:(fun _ data -> view_grammar g data)
in
Map.data xs
| Atom atom ->
let many = [%sexp (many : Sexp_grammar.list_grammar)] in
let%arr atom = atom in
[%string
"Encountered an atom, '%{atom}', while processing a list grammar: %{many#Sexp}"]
|> error_box
|> List.return)
| Fields f -> view_fields f
in
view_grammar grammar
;;
let view
(type a)
(module M : S with type t = a)
?(customizations = [])
(value : a Value.t)
`This_view_may_change_without_notice
=
let%sub sexp = Bonsai.pure M.sexp_of_t value in
view M.t_sexp_grammar.untyped sexp ~customizations
;;
let project_to_sexp
(type a)
(module M : Sexpable with type t = a)
(form : a Form.t Computation.t)
=
let%map.Computation form = form in
Form.project form ~parse_exn:M.sexp_of_t ~unparse:M.t_of_sexp
;;
let maybe_set_tooltip doc view =
match doc with
| Some str -> Form.View.set_tooltip (Vdom.Node.text str) view
| None -> view
;;
let form
?textbox_for_string
(grammar : Sexp_grammar.grammar Value.t)
~on_set_error
~customizations
=
let rec grammar_form (grammar : Sexp_grammar.grammar Value.t)
: Sexp.t Form.t Computation.t
=
Bonsai.lazy_ (lazy (grammar_form_impl grammar))
and grammar_form_impl (grammar : Sexp_grammar.grammar Value.t)
: Sexp.t Form.t Computation.t
=
match%sub grammar with
| Bool ->
E.Checkbox.bool ~default:false () |> project_to_sexp (module Bool) |> error_hint
| String ->
(match textbox_for_string with
| None -> E.Textarea.string () |> project_to_sexp (module String)
| Some () -> E.Textbox.string () |> project_to_sexp (module String))
|> error_hint
| Integer ->
E.Number.int ~default:0 ~step:1 () |> project_to_sexp (module Int) |> error_hint
| Char ->
E.Textbox.stringable (module Char) |> project_to_sexp (module Char) |> error_hint
| Float ->
E.Number.float ~default:0. ~step:1. ()
|> project_to_sexp (module Float)
|> error_hint
| Option g -> option_form g
| List l -> list_grammar_form l
| Lazy g ->
Bonsai.lazy_
(lazy
(let%sub g = Bonsai.pure force g in
grammar_form_impl g))
| Tagged with_tag -> with_tag_form with_tag |> error_hint
| Variant { case_sensitivity = _; clauses = [] } ->
Bonsai.const (Form.return_error (Error.create_s [%message "no clauses in variant"]))
| Variant { case_sensitivity = _; clauses } -> clauses_form clauses |> error_hint
| Union [] ->
Bonsai.const (Form.return_error (Error.create_s [%message "no grammars in union"]))
| Any _ | Union _ -> E.Textarea.sexpable (module Sexp)
| Tyvar _ | Tycon _ | Recursive _ ->
Bonsai.const
(Form.return_error
(Error.create_s [%message "unreachable code in Bonsai_web_ui_autogenerated"]))
and option_form (grammar : Sexp_grammar.grammar Value.t) =
let%sub form, _ =
Bonsai.wrap
(module Unit)
~default_model:()
~apply_action:(fun ~inject:_ ~schedule_event (_, inner) () sexp ->
schedule_event (Form.set inner sexp))
~f:(fun (_ : unit Value.t) inject_outer ->
let%sub outer, set_outer = Bonsai.state (module Bool) ~default_model:false in
let%sub toggle_view =
let%sub path = Bonsai.path_id in
let%arr outer = outer
and set_outer = set_outer
and path = path in
E.Checkbox.Private.make_input
~id:(Vdom.Attr.id path)
~extra_attrs:[]
~state:outer
~set_state:set_outer
in
let%sub inner =
match%sub outer with
| false -> Bonsai.const (Form.return (Sexp.List []))
| true -> grammar_form grammar
in
let%sub inner_value = Bonsai.pure Form.value inner in
let%sub view =
match%sub outer with
| false ->
let%arr toggle_view = toggle_view in
Form.View.option ~toggle:toggle_view ~status:(Currently_none None)
| true ->
let%arr toggle_view = toggle_view
and inner = inner in
Form.View.option
~toggle:toggle_view
~status:(Currently_some (Form.view inner))
in
let%sub value =
match%sub outer with
| false -> Bonsai.const (Ok (Sexp.List []))
| true ->
(match%sub inner_value with
| Ok inner ->
let%arr inner = inner in
Ok (Sexp.List [ inner ])
| Error err ->
let%arr err = err in
Error err)
in
let%sub set =
let%arr set_outer = set_outer
and inject_outer = inject_outer in
function
| Sexp.List [] | Atom "None" | Atom "none" -> set_outer false
| List [ a ] | List [ Atom ("Some" | "some"); a ] ->
Effect.Many [ set_outer true; inject_outer a ]
| _ as sexp ->
on_set_error [%message "expected option sexp, but got" (sexp : Sexp.t)]
in
let%arr view = view
and value = value
and set = set
and inner = inner in
Form.Expert.create ~view ~value ~set, inner)
in
return form
and clauses_form (clauses : Sexp_grammar.clause Sexp_grammar.with_tag_list list Value.t)
=
let%sub form, _ =
Bonsai.wrap
(module Unit)
~default_model:()
~apply_action:(fun ~inject:_ ~schedule_event (_, inner) () sexp ->
schedule_event (Form.set inner sexp))
~f:(fun (_ : unit Value.t) inject_outer ->
let%sub clauses =
let%arr clauses = clauses in
List.map clauses ~f:Grammar_helper.Tags.strip_tags
in
let%sub clauses_names, clauses_as_map =
let%arr clauses = clauses in
let as_map =
String.Map.of_alist_exn
(List.map clauses ~f:(fun clause -> clause.name, clause))
in
let just_the_names = List.map clauses ~f:(fun clause -> clause.name) in
just_the_names, as_map
in
let%sub outer, set_outer, outer_view =
let open E.Dropdown.Private in
let module Opt = struct
type t = string Opt.t [@@deriving sexp, equal]
let to_option = Opt.to_option
end
in
let%sub outer, set_outer =
Bonsai.state (module Opt) ~default_model:Uninitialized
in
let%sub path = Bonsai.path_id in
let%sub view =
let%arr path = path
and outer = outer
and set_outer = set_outer
and clause_names = clauses_names in
make_input
~to_string:(Form.View.sexp_to_pretty_string [%sexp_of: string])
(module String)
~id:(Vdom.Attr.id path)
~include_empty:true
~default_value:None
~state:outer
~set_state:set_outer
~all:clause_names
~extra_attrs:
[ Vdom.Attr.style (Css_gen.width (`Percent (Percent.of_mult 1.))) ]
~extra_option_attrs:(Fn.const [])
in
let%arr outer = outer
and set_outer = set_outer
and view = view in
( Opt.to_option outer
, (function
| None -> set_outer Explicitly_none
| Some outer -> set_outer (Set outer))
, view )
in
let%sub clauses_forms =
Bonsai.assoc
(module String)
clauses_as_map
~f:(fun name clause ->
let%sub { Sexp_grammar.clause_kind; _ } = return clause in
let%sub is_active =
let%arr outer = outer
and name = name in
match outer with
| None -> false
| Some clause_name when String.equal clause_name name -> true
| Some _ -> false
in
if%sub is_active
then (
match%sub clause_kind with
| Atom_clause -> Bonsai.const (Form.return (Sexp.List []))
| List_clause { args : Sexp_grammar.list_grammar } ->
list_grammar_form args)
else Bonsai.const (Form.return (Sexp.List [])))
in
let%sub inner =
let%arr outer = outer
and clauses_forms = clauses_forms in
match outer with
| None -> Form.return (Sexp.List [])
| Some selected_name ->
(match Map.find clauses_forms selected_name with
| Some form -> form
| None ->
{| BUG: auto-generated forms could not find a form with the selected variant name |}
|> Error.of_string
|> Form.return_error)
in
let%sub view =
match%sub outer with
| None ->
let%arr outer_view = outer_view in
Form.View.variant ~clause_selector:outer_view ~selected_clause:None
| Some clause_name ->
let%arr clause_name = clause_name
and outer_view = outer_view
and inner = inner in
Form.View.variant
~clause_selector:outer_view
~selected_clause:(Some { clause_name; clause_view = Form.view inner })
in
let%sub set =
let%arr clauses = clauses
and set_outer = set_outer
and inject_outer = inject_outer in
function
| Sexp.List (Sexp.Atom clause_name :: args) ->
(match
List.find clauses ~f:(fun clause -> String.equal clause.name clause_name)
with
| Some clause ->
Effect.Many
[ set_outer (Some clause.name); inject_outer (Sexp.List args) ]
| None ->
on_set_error
[%message
"unknown clause_name while setting a clause form"
(clause_name : string)])
| Sexp.Atom clause_name ->
(match
List.find clauses ~f:(fun clause -> String.equal clause.name clause_name)
with
| Some clause -> set_outer (Some clause.name)
| None ->
on_set_error
[%message
"unknown clause_name while setting a clause form"
(clause_name : string)])
| sexp ->
on_set_error
[%message "unexpected format while setting a clause form" (sexp : Sexp.t)]
in
let%sub value =
let%arr outer = outer
and inner = inner in
match outer, Form.value inner with
| Some clause_name, Ok (Sexp.List []) -> Ok (Sexp.Atom clause_name)
| Some clause_name, Ok (Sexp.List args) ->
Ok (Sexp.List (Sexp.Atom clause_name :: args))
| Some _, Ok sexp ->
Or_error.error_s [%message "invalid sexp encountered" (sexp : Sexp.t)]
| None, _ -> Or_error.error_s [%message "a value is required"]
| _, (Error _ as err) -> err
in
let%arr view = view
and value = value
and set = set
and inner = inner in
Form.Expert.create ~view ~value ~set, inner)
in
return form
and list_grammar_form (grammar : Sexp_grammar.list_grammar Value.t) =
Bonsai.lazy_ (lazy (list_grammar_form_impl grammar))
and list_grammar_form_impl (grammar : Sexp_grammar.list_grammar Value.t) =
let%sub should_annotate_with_ordinals =
match%arr grammar with
| Cons (_, Empty) -> false
| Cons _ -> true
| Empty | Many _ | Fields _ -> false
in
let rec annotate_with_ordinals (grammar : Sexp_grammar.list_grammar Value.t) ~depth
: (Sexp.t Or_error.t * (Sexp.t -> unit Effect.t) * Form.View.t list) Computation.t
=
match%sub grammar with
| Empty -> Bonsai.const (Ok (Sexp.List []), (fun _ -> Effect.Ignore), [])
| Many grammar ->
let%map.Computation list_form = grammar_form grammar |> E.Multiple.list in
let view = Form.view list_form in
let value =
let%map.Or_error value = Form.value list_form in
Sexp.List value
in
let set = function
| Sexp.List l -> Form.set list_form l
| Sexp.Atom _ as atom ->
on_set_error
[%message "attempted to set atom into list grammar" (atom : Sexp.t)]
in
value, set, [ view ]
| Fields fields -> fields_grammar_form fields
| Cons (g, rest) ->
let%sub g_form = grammar_form g in
let%sub rest_value, rest_set, rest_views =
Bonsai.lazy_ (lazy (annotate_with_ordinals rest ~depth:(depth + 1)))
in
let%sub g_form =
match%sub should_annotate_with_ordinals with
| false -> return g_form
| true ->
error_hint
(let%arr g_form = g_form in
Form.label (Ordinal_abbreviation.to_string depth) g_form)
in
let%sub value =
let%arr g_form = g_form
and rest_value = rest_value
and grammar = grammar in
let%bind.Or_error g = Form.value g_form
and rest = rest_value in
match rest with
| Sexp.Atom _ as atom ->
Or_error.error_s
[%message
"got unexpected atom for list grammar"
(grammar : Sexp_grammar.list_grammar)
(atom : Sexp.t)]
| List l -> Ok (Sexp.List (g :: l))
in
let%sub set =
let%arr g_form = g_form
and rest_set = rest_set
and grammar = grammar in
function
| Sexp.List (g :: rest) ->
Effect.Many [ Form.set g_form g; rest_set (Sexp.List rest) ]
| sexp ->
on_set_error
[%message
"attempted to set atom into list grammar"
(grammar : Sexp_grammar.list_grammar)
(sexp : Sexp.t)]
in
let%sub views =
let%arr rest_views = rest_views
and g_form = g_form in
Form.view g_form :: rest_views
in
let%arr value = value
and views = views
and set = set in
value, set, views
in
let%map.Computation value, set, views = annotate_with_ordinals grammar ~depth:1 in
let view =
match views with
| [] -> Form.View.empty
| [ single ] -> single
| _ -> Form.View.tuple views
in
Form.Expert.create ~value ~set ~view
and optional_field_grammar_form (args : Sexp_grammar.list_grammar Value.t) =
let%sub form, _ =
Bonsai.wrap
(module Unit)
~default_model:()
~apply_action:(fun ~inject:_ ~schedule_event (_, inner) () inner_value ->
schedule_event (Form.set inner inner_value))
~f:(fun (_ : unit Value.t) inject_outer ->
let%sub override, set_override =
Bonsai.state (module Bool) ~default_model:false
in
let%sub toggle =
let%arr override = override
and set_override = set_override
and args = args in
match args with
| Empty ->
Vdom_input_widgets.Checkbox.simple
~merge_behavior:Legacy_dont_merge
~is_checked:override
~label:""
~on_toggle:(set_override (not override))
()
| _ ->
let text = if override then "[override]" else "[default]" in
let override_status =
if override then Style.override_showing else Style.override_hidden
in
N.div
~attrs:
[ A.(
override_status
@ Style.override_text
@ on_click (fun _ -> set_override (not override)))
]
[ N.text text ]
in
let%sub inner =
match%sub override with
| false ->
Bonsai.const
(Form.return_error (Error.of_string "unreachable auto-gen code"))
| true -> list_grammar_form args
in
let%arr override = override
and set_override = set_override
and toggle = toggle
and inject_outer = inject_outer
and inner = inner in
let view =
match override with
| false -> Form.View.option ~toggle ~status:(Currently_none None)
| true -> Form.View.option ~toggle ~status:(Currently_some (Form.view inner))
in
let value =
match override with
| false -> Ok None
| true ->
(match Form.value inner with
| Ok s -> Ok (Some s)
| Error _ as err -> err)
in
let set = function
| None -> set_override false
| Some s -> Effect.Many [ set_override true; inject_outer s ]
in
Form.Expert.create ~view ~value ~set, inner)
in
return form
and fields_grammar_form (fields : Sexp_grammar.record Value.t) =
let%sub { fields; } = return fields in
let%sub original_field_order =
let%arr fields = fields in
fields
|> List.map ~f:Grammar_helper.Tags.strip_tags
|> List.map ~f:(fun { name; _ } -> name)
in
let%sub forms =
let%sub fields_by_name =
let%arr fields = fields in
List.map fields ~f:(fun (field : Sexp_grammar.field Sexp_grammar.with_tag_list) ->
let field, tags = Grammar_helper.Tags.collect_and_strip_tags field in
let doc = Grammar_helper.Tags.find_doc_tag tags in
field.name, (field, doc))
|> String.Map.of_alist_exn
in
Bonsai.assoc
(module String)
fields_by_name
~f:(fun _ field_and_doc ->
let%sub field, doc = return field_and_doc in
let%sub required =
let%arr field = field in
field.required
in
let%sub args =
let%arr field = field in
field.args
in
let%sub args_form =
match%sub required with
| true ->
let%map.Computation form = list_grammar_form args in
Form.project
form
~parse_exn:(fun s -> Some s)
~unparse:(fun s -> Option.value_exn ~here:[%here] s)
| false -> optional_field_grammar_form args
in
let%arr args_form = args_form
and required = required
and doc = doc in
args_form, `Required required, `Doc doc)
in
let%sub view =
let%arr forms = forms
and original_field_order = original_field_order in
List.map original_field_order ~f:(fun field_name ->
let form, `Required _, `Doc doc = Map.find_exn forms field_name in
{ Form.View.field_view = form |> Form.view |> maybe_set_tooltip doc; field_name })
|> Form.View.record
in
let%sub set =
let%arr forms = forms
and = allow_extra_fields in
fun sexp ->
let sexp_map =
match sexp with
| Sexp.Atom _ -> String.Map.empty
| List fields ->
List.filter_map fields ~f:(function
| List [ Atom name; value ] -> Some (name, Sexp.List [ value ])
| _ -> None)
|> String.Map.of_alist_exn
in
Map.merge sexp_map forms ~f:(fun ~key -> function
| `Left args ->
(match allow_extra_fields with
| true -> None
| false ->
Some
(on_set_error
[%message
"extra fields are not allowed, but got an extra field"
(key : string)
(args : Sexp.t)]))
| `Right (form, `Required false, `Doc _) -> Some (Form.set form None)
| `Right (_, `Required true, `Doc _) ->
Some (on_set_error [%message "required field is not present" (key : string)])
| `Both (args, (form, `Required _, `Doc _)) -> Some (Form.set form (Some args)))
|> Map.data
|> Effect.Many
in
let%sub value =
let%sub values =
Bonsai.Map.filter_mapi forms ~f:(fun ~key ~data:(form, `Required _, `Doc _) ->
match Form.value form with
| Error _ as err -> Some err
| Ok None -> None
| Ok (Some (Sexp.Atom _ as atom)) ->
Some
(Or_error.error_s
[%message "expected list of args from subform, but got" (atom : Sexp.t)])
| Ok (Some (Sexp.List value)) -> Some (Ok (Sexp.List (Sexp.Atom key :: value))))
in
let%arr values = values in
Map.data values |> Or_error.all |> Or_error.map ~f:(fun list -> Sexp.List list)
in
let%arr value = value
and view = view
and set = set in
value, set, [ view ]
and with_tag_form (with_tag : Sexp_grammar.grammar Sexp_grammar.with_tag Value.t) =
let%sub customization_to_use =
let%arr with_tag = with_tag in
List.find_mapi customizations ~f:(fun i customization ->
match Customization.apply_if_name_matches customization with_tag with
| None -> None
| Some _ -> Some i)
in
Bonsai.enum
(module struct
type t = int option [@@deriving sexp, equal, compare]
let all = None :: List.init (List.length customizations) ~f:(fun i -> Some i)
end)
~match_:customization_to_use
~with_:(function
| None ->
let%sub grammar =
let%arr with_tag = with_tag in
with_tag.grammar
in
grammar_form grammar
| Some index ->
let customization = List.nth_exn customizations index in
Customization.apply customization with_tag ~recurse:grammar_form)
in
grammar_form grammar
;;
let form'
?(on_set_error = Effect.print_s)
?(customizations = Customization.Defaults.Form.all)
?textbox_for_string
sexp_grammar
=
let%sub sexp_grammar =
Bonsai.pure Sexp_grammar.Unroll_recursion.of_grammar_exn sexp_grammar
in
let%sub form = form ?textbox_for_string sexp_grammar ~on_set_error ~customizations in
let%arr form = form
and sexp_grammar = sexp_grammar in
let validate_sexp = Sexp_grammar.validate_sexp_untyped sexp_grammar in
Form.Expert.create ~view:(Form.view form) ~value:(Form.value form) ~set:(fun sexp ->
match unstage validate_sexp sexp with
| Ok () -> Form.set form sexp
| Error error ->
on_set_error
[%message
"BUG: Sexp representation of set form value does not match sexp grammar. Does \
your sexp_of_t function match your sexp grammar?"
~value:(sexp : Sexp.t)
(error : Error.t)])
;;
let form
(type a)
(module M : S with type t = a)
?on_set_error
?customizations
?textbox_for_string
()
: a Form.t Computation.t
=
let%map.Computation form =
form'
?on_set_error
?customizations
?textbox_for_string
(Value.return M.t_sexp_grammar.untyped)
in
Form.project form ~parse_exn:M.t_of_sexp ~unparse:M.sexp_of_t
;;
let view_as_vdom ?on_submit ?editable form =
let on_submit =
Option.map
on_submit
~f:
(fun
{ Form.Submit.f; handle_enter; button_text; button_attr; button_location } ->
let on_submit = Form.value form |> Result.ok |> Option.map ~f in
{ Form.View.on_submit; handle_enter; button_text; button_attr; button_location })
in
Render_form.to_vdom ?on_submit ?editable (Form.view form)
;;