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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use dom::attr::Attr;
use dom::bindings::codegen::Bindings::DOMTokenListBinding;
use dom::bindings::codegen::Bindings::DOMTokenListBinding::DOMTokenListMethods;
use dom::bindings::error::{Fallible, InvalidCharacter, Syntax};
use dom::bindings::global::Window;
use dom::bindings::js::{JS, JSRef, Temporary, OptionalRootable};
use dom::bindings::utils::{Reflector, Reflectable, reflect_dom_object};
use dom::element::{Element, AttributeHandlers};
use dom::node::window_from_node;
use servo_util::atom::Atom;
use servo_util::namespace::Null;
use servo_util::str::{DOMString, HTML_SPACE_CHARACTERS};
#[deriving(Encodable)]
pub struct DOMTokenList {
reflector_: Reflector,
element: JS<Element>,
local_name: &'static str,
}
impl DOMTokenList {
pub fn new_inherited(element: &JSRef<Element>,
local_name: &'static str) -> DOMTokenList {
DOMTokenList {
reflector_: Reflector::new(),
element: JS::from_rooted(element),
local_name: local_name,
}
}
pub fn new(element: &JSRef<Element>,
local_name: &'static str) -> Temporary<DOMTokenList> {
let window = window_from_node(element).root();
reflect_dom_object(box DOMTokenList::new_inherited(element, local_name),
&Window(*window), DOMTokenListBinding::Wrap)
}
}
impl Reflectable for DOMTokenList {
fn reflector<'a>(&'a self) -> &'a Reflector {
&self.reflector_
}
}
trait PrivateDOMTokenListHelpers {
fn attribute(&self) -> Option<Temporary<Attr>>;
fn check_token_exceptions<'a>(&self, token: &'a str) -> Fallible<&'a str>;
}
impl<'a> PrivateDOMTokenListHelpers for JSRef<'a, DOMTokenList> {
fn attribute(&self) -> Option<Temporary<Attr>> {
let element = self.element.root();
element.deref().get_attribute(Null, self.local_name)
}
fn check_token_exceptions<'a>(&self, token: &'a str) -> Fallible<&'a str> {
match token {
"" => Err(Syntax),
token if token.find(HTML_SPACE_CHARACTERS).is_some() => Err(InvalidCharacter),
token => Ok(token)
}
}
}
// http://dom.spec.whatwg.org/#domtokenlist
impl<'a> DOMTokenListMethods for JSRef<'a, DOMTokenList> {
// http://dom.spec.whatwg.org/#dom-domtokenlist-length
fn Length(&self) -> u32 {
self.attribute().root().map(|attr| {
attr.value().tokens().map(|tokens| tokens.len()).unwrap_or(0)
}).unwrap_or(0) as u32
}
// http://dom.spec.whatwg.org/#dom-domtokenlist-item
fn Item(&self, index: u32) -> Option<DOMString> {
self.attribute().root().and_then(|attr| attr.value().tokens().and_then(|mut tokens| {
tokens.idx(index as uint).map(|token| token.as_slice().to_string())
}))
}
fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<DOMString> {
let item = self.Item(index);
*found = item.is_some();
item
}
// http://dom.spec.whatwg.org/#dom-domtokenlist-contains
fn Contains(&self, token: DOMString) -> Fallible<bool> {
self.check_token_exceptions(token.as_slice()).map(|slice| {
self.attribute().root().and_then(|attr| attr.value().tokens().map(|mut tokens| {
let atom = Atom::from_slice(slice);
tokens.any(|token| *token == atom)
})).unwrap_or(false)
})
}
}
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