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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, TokenListAttrValue};
use dom::bindings::codegen::Bindings::DOMTokenListBinding;
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::namespace::Null;
use servo_util::str::DOMString;
#[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, DOMTokenListBinding::Wrap)
}
}
impl Reflectable for DOMTokenList {
fn reflector<'a>(&'a self) -> &'a Reflector {
&self.reflector_
}
}
trait PrivateDOMTokenListHelpers {
fn attribute(&self) -> Option<Temporary<Attr>>;
}
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)
}
}
pub trait DOMTokenListMethods {
fn Length(&self) -> u32;
fn Item(&self, index: u32) -> Option<DOMString>;
fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<DOMString>;
}
// 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 {
let attribute = self.attribute().root();
match attribute {
Some(attribute) => {
match *attribute.deref().value() {
TokenListAttrValue(_, ref indexes) => indexes.len() as u32,
_ => fail!("Expected a TokenListAttrValue"),
}
}
None => 0,
}
}
// http://dom.spec.whatwg.org/#dom-domtokenlist-item
fn Item(&self, index: u32) -> Option<DOMString> {
let attribute = self.attribute().root();
attribute.and_then(|attribute| {
match *attribute.deref().value() {
TokenListAttrValue(ref value, ref indexes) => {
indexes.as_slice().get(index as uint).map(|&(start, end)| {
value.as_slice().slice(start, end).to_string()
})
},
_ => fail!("Expected a TokenListAttrValue"),
}
})
}
fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<DOMString> {
let item = self.Item(index);
*found = item.is_some();
item
}
}
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