add Icon.create_div

src/icon.ml

@@ -4,6 +4,8 @@ type t = Jv.t
 
 let to_jv = Fun.id
 
+let of_jv = Fun.id
+
 type opt =
   | Icon_retina_url of string
   | Icon_size of Point.t
@@ -47,3 +49,21 @@ let create icon_url options =
   let l = List.map (fun o -> (to_string o, opt_to_jv o)) options in
   let l = Array.of_list @@ (("iconUrl", Jv.of_string icon_url) :: l) in
   Jv.call Global.leaflet "icon" [| Jv.obj l |]
+
+let create_div ~html ~bg_pos options =
+  let l = List.map (fun o -> (to_string o, opt_to_jv o)) options in
+  let div_options =
+    let html =
+      match html with
+      | None -> []
+      | Some html -> [ ("html", Jv.of_string html) ]
+    in
+    let bg_pos =
+      match bg_pos with
+      | None -> []
+      | Some bg_pos -> [ ("bgPos", Point.to_jv bg_pos) ]
+    in
+    html @ bg_pos
+  in
+  let l = Array.of_list @@ div_options @ l in
+  Jv.call Global.leaflet "divIcon" [| Jv.obj l |]

src/icon.mli

@@ -5,6 +5,9 @@ type t
 (** [to_jv o] is [o] as {!Jv.t} *)
 val to_jv : t -> Jv.t
 
+(** [of_jv o] is [o] as {!Icon.t} *)
+val of_jv : Jv.t -> t
+
 (** type for icon option used to create an icon*)
 type opt =
   | Icon_retina_url of string
@@ -22,3 +25,9 @@ type opt =
 (** [create icon_url options] Creates an icon instance with the given [options],
     and the required `iconUrl` option set to [icon_url] *)
 val create : string -> opt list -> t
+
+(** [create_div ~html ~bg_pos options] Creates an DivIcon instance with the
+    given [options], [bg_pos] is the optional relative position of the
+    background, in pixels [html] is custom HTML code to put inside the div
+    element, empty by default. *)
+val create_div : html:string option -> bg_pos:Point.t option -> opt list -> t