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(* Js_of_ocaml library
* http://www.ocsigen.org/js_of_ocaml/
* Copyright (C) 2021 Philip White
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, with linking exception;
* either version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*)
open! Import
class type performanceObserverInit = object
method entryTypes : Js.js_string Js.t Js.js_array Js.t Js.writeonly_prop
end
class type performanceEntry = object
method name : Js.js_string Js.t Js.readonly_prop
method entryType : Js.js_string Js.t Js.readonly_prop
method startTime : Js.number_t Js.readonly_prop
method duration : Js.number_t Js.readonly_prop
end
class type performanceObserverEntryList = object
method getEntries : performanceEntry Js.t Js.js_array Js.t Js.meth
end
class type performanceObserver = object
method observe : performanceObserverInit Js.t -> unit Js.meth
method disconnect : unit Js.meth
method takeRecords : performanceEntry Js.t Js.js_array Js.t Js.meth
end
let performanceObserver = Js.Unsafe.global##._PerformanceObserver
let is_supported () = Js.Optdef.test performanceObserver
let performanceObserver :
( (performanceObserverEntryList Js.t -> performanceObserver Js.t -> unit) Js.callback
-> performanceObserver Js.t)
Js.constr =
performanceObserver
let observe ~entry_types ~f =
let entry_types = entry_types |> List.map Js.string |> Array.of_list |> Js.array in
let performance_observer_init : performanceObserverInit Js.t = Js.Unsafe.obj [||] in
let () = performance_observer_init##.entryTypes := entry_types in
let obs = new%js performanceObserver (Js.wrap_callback f) in
let () = obs##observe performance_observer_init in
obs
|
