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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
open! Import
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 (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 Js.to_bool 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 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 : file_input t = Unsafe.coerce elt in
let list = elt##.files in
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 get_form_elements (form : formElement t) =
let rec loop acc i =
if i < 0
then acc
else
match Opt.to_option (form##.elements##item i) with
| None -> loop acc (i - i)
| Some x -> loop (x :: acc) (i - 1)
in
loop [] (form##.elements##.length - 1)
let get_element_content ?get v =
match tagged v with
| Select v -> get_select_val v
| Input v -> get_input_val ?get v
| Textarea v -> get_textarea_val v
| _ -> []
let form_elements ?get (form : formElement t) =
List.flatten (List.map (fun v -> get_element_content ?get v) (get_form_elements form))
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 (new%js 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)
|
