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|
(* Js_of_ocaml library
* http://www.ocsigen.org/js_of_ocaml/
* Copyright (C) 2011 Pierre Chambart
* Laboratoire PPS - CNRS Université Paris Diderot
*
* 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 Js
open Dom_html
class type formData = object
method append : js_string t -> js_string t -> unit meth
method append_blob : js_string t -> File.blob t -> unit meth
end
let formData : formData t constr = Js.Unsafe.global ## _FormData
let formData_form : (formElement t -> formData t) constr =
Js.Unsafe.global ## _FormData
type form_elt =
[ `String of js_string t
| `File of File.file t ]
type form_contents =
[ `Fields of (string * form_elt) list ref
| `FormData of formData t ]
let rec filter_map f = function
| [] -> []
| v::q ->
match f v with
| None -> filter_map f q
| Some v' -> v' :: (filter_map f q)
class type submittableElement = object
method disabled : bool t prop
method name : js_string t readonly_prop
method value : js_string t prop
end
let have_content (elt:submittableElement t) =
elt##name##length > 0 && not (Js.to_bool (elt##disabled))
let get_textarea_val ?(get=false) (elt:textAreaElement t) =
if have_content (elt:>submittableElement t)
then
let name = to_string (elt##name) in
[name,`String (elt##value)]
else []
let get_select_val (elt:selectElement t) =
if have_content (elt:>submittableElement t)
then
let name = to_string (elt##name) in
if to_bool (elt##multiple)
then
let options = Array.init ( elt##options##length )
(fun i -> Opt.to_option elt##options##item(i)) in
filter_map (function
| None -> None
| Some e ->
if e##selected
then Some (name,`String (e##value))
else None)
(Array.to_list options)
else [name,`String (elt##value)]
else []
class type file_input = object
inherit inputElement
method files : File.fileList t optdef readonly_prop
method multiple : bool optdef readonly_prop
end
let get_input_val ?(get=false) (elt:inputElement t) =
if have_content (elt:>submittableElement t)
then
let name = to_string (elt##name) in
let value = elt##value in
match to_bytestring (elt##_type##toLowerCase ()) with
| "checkbox"
| "radio" ->
if to_bool (elt##checked)
then [name,`String value]
else []
| "submit"
| "reset" -> []
| "text"
| "password" -> [name,`String value]
| "file" ->
if get
then [name,`String value]
else
let elt = (Unsafe.coerce elt:file_input t) in
(match Optdef.to_option (elt##files) with
| None -> []
| Some list ->
if list##length = 0
then [name,`String (Js.string "")]
else
match Optdef.to_option (elt##multiple) with
| None
| Some false ->
(match Opt.to_option (list##item(0)) with
| None -> []
| Some file -> [name,`File file])
| Some true ->
filter_map (fun f ->
match Opt.to_option f with
| None -> None
| Some file -> Some (name,`File file))
(Array.to_list (Array.init (list##length)
(fun i -> list##item(i)))))
| _ -> [name,`String value]
else []
let form_elements ?get (form:formElement t) =
let length = form##elements##length in
let elements = Array.to_list
(Array.init length
(fun i -> Opt.to_option (form##elements##item(i)))) in
let contents =
List.flatten
(List.map
(function
| None -> [] (* shouldn't happen *)
| Some v ->
match tagged v with
| Select v -> get_select_val v
| Input v -> get_input_val ?get v
| Textarea v -> get_textarea_val v
| _ -> [] )
elements)
in
contents
let append (form_contents:form_contents) (form_elt:string * form_elt) =
match form_contents with
| `Fields list -> list := form_elt::!list
| `FormData f ->
match form_elt with
| name, `String s -> f##append(string name, s)
| name, `File file -> f##append_blob(string name, (file :> File.blob t))
let empty_form_contents () =
match Optdef.to_option (Js.def formData) with
| None -> `Fields (ref [])
| Some constr -> `FormData ( jsnew constr() )
let post_form_contents form =
let contents = empty_form_contents () in
List.iter (append contents) (form_elements form);
contents
let get_form_contents form =
List.map (function
| name, `String s -> name, to_string s
| _ -> assert false) (form_elements ~get:true form)
|
