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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::activation::Activatable;
use dom::attr::AttrValue;
use dom::bindings::codegen::Bindings::HTMLLabelElementBinding;
use dom::bindings::codegen::Bindings::HTMLLabelElementBinding::HTMLLabelElementMethods;
use dom::bindings::inheritance::Castable;
use dom::bindings::js::Root;
use dom::document::Document;
use dom::element::Element;
use dom::event::Event;
use dom::eventtarget::EventTarget;
use dom::htmlelement::HTMLElement;
use dom::htmlformelement::{FormControl, HTMLFormElement};
use dom::node::{document_from_node, Node};
use dom::virtualmethods::VirtualMethods;
use string_cache::Atom;
use util::str::DOMString;
#[dom_struct]
pub struct HTMLLabelElement {
htmlelement: HTMLElement,
}
impl HTMLLabelElement {
fn new_inherited(localName: DOMString,
prefix: Option<DOMString>,
document: &Document) -> HTMLLabelElement {
HTMLLabelElement {
htmlelement:
HTMLElement::new_inherited(localName, prefix, document)
}
}
#[allow(unrooted_must_root)]
pub fn new(localName: DOMString,
prefix: Option<DOMString>,
document: &Document) -> Root<HTMLLabelElement> {
let element = HTMLLabelElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLLabelElementBinding::Wrap)
}
}
impl Activatable for HTMLLabelElement {
fn as_element(&self) -> &Element {
self.upcast::<Element>()
}
fn is_instance_activatable(&self) -> bool {
return true;
}
// https://html.spec.whatwg.org/multipage/#run-pre-click-activation-steps
// https://html.spec.whatwg.org/multipage/#the-button-element:activation-behavior
fn pre_click_activation(&self) {
}
// https://html.spec.whatwg.org/multipage/#run-canceled-activation-steps
fn canceled_activation(&self) {
}
// https://html.spec.whatwg.org/multipage/#run-post-click-activation-steps
fn activation_behavior(&self, _event: &Event, _target: &EventTarget) {
self.upcast::<Element>()
.as_maybe_activatable()
.map(|a| a.synthetic_click_activation(false, false, false, false));
}
// https://html.spec.whatwg.org/multipage/#implicit-submission
fn implicit_submission(&self, _ctrlKey: bool, _shiftKey: bool, _altKey: bool, _metaKey: bool) {
//FIXME: Investigate and implement implicit submission for label elements
// Issue filed at https://github.com/servo/servo/issues/8263
}
}
impl HTMLLabelElementMethods for HTMLLabelElement {
// https://html.spec.whatwg.org/multipage/#dom-fae-form
fn GetForm(&self) -> Option<Root<HTMLFormElement>> {
self.form_owner()
}
// https://html.spec.whatwg.org/multipage/#dom-label-htmlfor
make_getter!(HtmlFor, "for");
// https://html.spec.whatwg.org/multipage/#dom-label-htmlfor
make_atomic_setter!(SetHtmlFor, "for");
// https://html.spec.whatwg.org/multipage/#dom-label-control
fn GetControl(&self) -> Option<Root<HTMLElement>> {
if !self.upcast::<Node>().is_in_doc() {
return None;
}
let for_attr = match self.upcast::<Element>().get_attribute(&ns!(), &atom!("for")) {
Some(for_attr) => for_attr,
None => return self.first_labelable_descendant(),
};
let for_value = for_attr.value();
document_from_node(self).get_element_by_id(for_value.as_atom())
.and_then(Root::downcast::<HTMLElement>)
.into_iter()
.filter(|e| e.is_labelable_element())
.next()
}
}
impl VirtualMethods for HTMLLabelElement {
fn super_type(&self) -> Option<&VirtualMethods> {
Some(self.upcast::<HTMLElement>() as &VirtualMethods)
}
fn parse_plain_attribute(&self, name: &Atom, value: DOMString) -> AttrValue {
match name {
&atom!("for") => AttrValue::from_atomic(value),
_ => self.super_type().unwrap().parse_plain_attribute(name, value),
}
}
}
impl HTMLLabelElement {
pub fn first_labelable_descendant(&self) -> Option<Root<HTMLElement>> {
self.upcast::<Node>()
.traverse_preorder()
.filter_map(Root::downcast::<HTMLElement>)
.filter(|elem| elem.is_labelable_element())
.next()
}
}
impl FormControl for HTMLLabelElement {}
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