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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, AttrHelpers};
use dom::bindings::codegen::Bindings::DOMTokenListBinding;
use dom::bindings::codegen::Bindings::DOMTokenListBinding::DOMTokenListMethods;
use dom::bindings::error::{ErrorResult, Fallible};
use dom::bindings::error::Error::{InvalidCharacter, Syntax};
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, Root};
use dom::bindings::utils::{Reflector, reflect_dom_object};
use dom::element::{Element, AttributeHandlers};
use dom::node::window_from_node;
use util::str::{DOMString, HTML_SPACE_CHARACTERS};
use string_cache::Atom;
use std::borrow::ToOwned;
#[dom_struct]
pub struct DOMTokenList {
reflector_: Reflector,
element: JS<Element>,
local_name: Atom,
}
impl DOMTokenList {
pub fn new_inherited(element: &Element, local_name: Atom) -> DOMTokenList {
DOMTokenList {
reflector_: Reflector::new(),
element: JS::from_ref(element),
local_name: local_name,
}
}
pub fn new(element: &Element, local_name: &Atom) -> Root<DOMTokenList> {
let window = window_from_node(element);
reflect_dom_object(box DOMTokenList::new_inherited(element, local_name.clone()),
GlobalRef::Window(window.r()),
DOMTokenListBinding::Wrap)
}
}
trait PrivateDOMTokenListHelpers {
fn attribute(self) -> Option<Root<Attr>>;
fn check_token_exceptions(self, token: &str) -> Fallible<Atom>;
}
impl<'a> PrivateDOMTokenListHelpers for &'a DOMTokenList {
fn attribute(self) -> Option<Root<Attr>> {
let element = self.element.root();
element.r().get_attribute(&ns!(""), &self.local_name)
}
fn check_token_exceptions(self, token: &str) -> Fallible<Atom> {
match token {
"" => Err(Syntax),
slice if slice.find(HTML_SPACE_CHARACTERS).is_some() => Err(InvalidCharacter),
slice => Ok(Atom::from_slice(slice))
}
}
}
// https://dom.spec.whatwg.org/#domtokenlist
impl<'a> DOMTokenListMethods for &'a DOMTokenList {
// https://dom.spec.whatwg.org/#dom-domtokenlist-length
fn Length(self) -> u32 {
self.attribute().map(|attr| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attr = attr.r();
let value = attr.value();
value.tokens().map(|tokens| tokens.len()).unwrap_or(0)
}).unwrap_or(0) as u32
}
// https://dom.spec.whatwg.org/#dom-domtokenlist-item
fn Item(self, index: u32) -> Option<DOMString> {
self.attribute().and_then(|attr| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attr = attr.r();
let value = attr.value();
value.tokens().and_then(|tokens| {
tokens.get(index as usize).map(|token| (**token).to_owned())
})
})
}
fn IndexedGetter(self, index: u32, found: &mut bool) -> Option<DOMString> {
let item = self.Item(index);
*found = item.is_some();
item
}
// https://dom.spec.whatwg.org/#dom-domtokenlist-contains
fn Contains(self, token: DOMString) -> Fallible<bool> {
self.check_token_exceptions(&token).map(|token| {
self.attribute().map(|attr| {
// FIXME(https://github.com/rust-lang/rust/issues/23338)
let attr = attr.r();
let value = attr.value();
value.tokens()
.expect("Should have parsed this attribute")
.iter()
.any(|atom| *atom == token)
}).unwrap_or(false)
})
}
// https://dom.spec.whatwg.org/#dom-domtokenlist-add
fn Add(self, tokens: Vec<DOMString>) -> ErrorResult {
let element = self.element.root();
let mut atoms = element.r().get_tokenlist_attribute(&self.local_name);
for token in tokens.iter() {
let token = try!(self.check_token_exceptions(&token));
if !atoms.iter().any(|atom| *atom == token) {
atoms.push(token);
}
}
element.r().set_atomic_tokenlist_attribute(&self.local_name, atoms);
Ok(())
}
// https://dom.spec.whatwg.org/#dom-domtokenlist-remove
fn Remove(self, tokens: Vec<DOMString>) -> ErrorResult {
let element = self.element.root();
let mut atoms = element.r().get_tokenlist_attribute(&self.local_name);
for token in tokens.iter() {
let token = try!(self.check_token_exceptions(&token));
atoms.iter().position(|atom| *atom == token).map(|index| {
atoms.remove(index)
});
}
element.r().set_atomic_tokenlist_attribute(&self.local_name, atoms);
Ok(())
}
// https://dom.spec.whatwg.org/#dom-domtokenlist-toggle
fn Toggle(self, token: DOMString, force: Option<bool>) -> Fallible<bool> {
let element = self.element.root();
let mut atoms = element.r().get_tokenlist_attribute(&self.local_name);
let token = try!(self.check_token_exceptions(&token));
match atoms.iter().position(|atom| *atom == token) {
Some(index) => match force {
Some(true) => Ok(true),
_ => {
atoms.remove(index);
element.r().set_atomic_tokenlist_attribute(&self.local_name, atoms);
Ok(false)
}
},
None => match force {
Some(false) => Ok(false),
_ => {
atoms.push(token);
element.r().set_atomic_tokenlist_attribute(&self.local_name, atoms);
Ok(true)
}
}
}
}
// https://dom.spec.whatwg.org/#stringification-behavior
fn Stringifier(self) -> DOMString {
self.element.root().r().get_string_attribute(&self.local_name)
}
}
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