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store map's view to web storage

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This commit is contained in:
Swrup 2022-02-07 21:04:51 +01:00
parent 14d18b038c
commit 2b01e1f072
2 changed files with 120 additions and 25 deletions
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70
src/js_babillard.ml
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@ -1,5 +1,6 @@
let log = Format.printf
(*TODO fix duplicate module *)
module Leaflet = struct
(* get the leaflet object *)
let leaflet =
@ -17,17 +18,6 @@ module Leaflet = struct
let _container = El.div ~at:At.[ id (Jstr.v "map") ] [] in
Jv.call leaflet "map" [| Jv.of_string "map" |]
(* create map's pos *)
let lat_lng =
log "making latlng@.";
Jv.call leaflet "latLng" [| Jv.of_float 51.505; Jv.of_float (-0.09) |]
(* set map's pos *)
let () =
log "setting view@.";
let _m : Jv.t = Jv.call map "setView" [| lat_lng; Jv.of_int 13 |] in
()
(* create map tile layer *)
let tile_layer =
log "creating tile layer@.";
@ -46,6 +36,64 @@ module Leaflet = struct
log "adding tile layer@.";
let _map : Jv.t = Jv.call tile_layer "addTo" [| map |] in
()
let storage = Brr_io.Storage.local Brr.G.window
(* set map's view *)
(* try to set map's view to last position viewed by using web storage *)
let () =
log "setting view@.";
let lat = Brr_io.Storage.get_item storage (Jstr.of_string "lat") in
let lng = Brr_io.Storage.get_item storage (Jstr.of_string "lng") in
let zoom = Brr_io.Storage.get_item storage (Jstr.of_string "zoom") in
match (lat, lng, zoom) with
| Some lat, Some lng, Some zoom ->
let latlng =
Jv.call leaflet "latLng" [| Jv.of_jstr lat; Jv.of_jstr lng |]
in
ignore @@ Jv.call map "setView" [| latlng; Jv.of_jstr zoom |]
| _ ->
let latlng =
Jv.call leaflet "latLng" [| Jv.of_float 51.505; Jv.of_float (-0.09) |]
in
ignore @@ Jv.call map "setView" [| latlng; Jv.of_int 13 |]
let on_moveend _event =
log "on zoomend event@.";
let latlng = Jv.call map "getCenter" [||] in
let lat = Jv.get latlng "lat" in
let lng = Jv.get latlng "lng" in
match
Brr_io.Storage.set_item storage (Jstr.of_string "lat") (Jv.to_jstr lat)
with
| (exception Jv.Error _)
| Error _ ->
failwith "can't set latlng storage"
| Ok () -> (
match
Brr_io.Storage.set_item storage (Jstr.of_string "lng") (Jv.to_jstr lng)
with
| (exception Jv.Error _)
| Error _ ->
failwith "can't set latlng storage"
| Ok () -> () )
let on_zoomend _event =
log "on zoomend event@.";
let zoom = Jv.call map "getZoom" [||] in
match
Brr_io.Storage.set_item storage (Jstr.of_string "zoom") (Jv.to_jstr zoom)
with
| (exception Jv.Error _)
| Error _ ->
failwith "can't set latlng storage"
| Ok () -> ()
let () =
log "add on (move/zoom)end event@.";
ignore @@ Jv.call map "on" [| Jv.of_string "moveend"; Jv.repr on_moveend |];
ignore @@ Jv.call map "on" [| Jv.of_string "zoomend"; Jv.repr on_zoomend |];
()
end
module Marker = struct