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(* Title: Pure/PIDE/active.ML
Author: Makarius
Active areas within the document (see also Tools/jEdit/src/active.scala).
*)
signature ACTIVE =
sig
val make_markup: string -> {implicit: bool, properties: Properties.T} -> Markup.T
val markup_implicit: string -> string -> string
val markup: string -> string -> string
val sendback_markup_properties: Properties.T -> string -> string
val sendback_markup_command: string -> string
val dialog: unit -> (string -> Markup.T) * string future
val dialog_text: unit -> (string -> string) * string future
val dialog_result: serial -> string -> unit
end;
structure Active: ACTIVE =
struct
(* active markup *)
fun explicit_id () = Position.id_properties_of (Position.thread_data ());
fun make_markup name {implicit, properties} =
(name, [])
|> not implicit ? (fn markup => Markup.properties (explicit_id ()) markup)
|> Markup.properties properties;
fun markup_implicit name s = Markup.markup (make_markup name {implicit = true, properties = []}) s;
fun markup name s = Markup.markup (make_markup name {implicit = false, properties = []}) s;
fun sendback_markup_properties props s =
Markup.markup (make_markup Markup.sendbackN {implicit = false, properties = props}) s;
fun sendback_markup_command s =
sendback_markup_properties [Markup.padding_command] s;
(* dialog via document content *)
val dialogs = Synchronized.var "Active.dialogs" (Inttab.empty: string future Inttab.table);
fun dialog () =
let
val i = serial ();
fun abort () = Synchronized.change dialogs (Inttab.delete_safe i);
val promise = Future.promise_name "dialog" abort : string future;
val _ = Synchronized.change dialogs (Inttab.update_new (i, promise));
fun result_markup result = Markup.properties (explicit_id ()) (Markup.dialog i result);
in (result_markup, promise) end;
fun dialog_text () =
let val (markup, promise) = dialog ()
in (fn s => Markup.markup (markup s) s, promise) end;
fun dialog_result i result =
Synchronized.change_result dialogs
(fn tab => (Inttab.lookup tab i, Inttab.delete_safe i tab))
|> (fn NONE => () | SOME promise => Future.fulfill promise result);
end;
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet)
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