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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 https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
use crate::dom::bindings::codegen::Bindings::HTMLCollectionBinding::HTMLCollectionMethods;
use crate::dom::bindings::codegen::Bindings::HTMLOptionsCollectionBinding;
use crate::dom::bindings::codegen::Bindings::HTMLOptionsCollectionBinding::HTMLOptionsCollectionMethods;
use crate::dom::bindings::codegen::Bindings::HTMLSelectElementBinding::HTMLSelectElementMethods;
use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeBinding::NodeMethods;
use crate::dom::bindings::codegen::UnionTypes::{
HTMLElementOrLong, HTMLOptionElementOrHTMLOptGroupElement,
};
use crate::dom::bindings::error::{Error, ErrorResult};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::DOMString;
use crate::dom::element::Element;
use crate::dom::htmlcollection::{CollectionFilter, HTMLCollection};
use crate::dom::htmloptionelement::HTMLOptionElement;
use crate::dom::htmlselectelement::HTMLSelectElement;
use crate::dom::node::{document_from_node, Node};
use crate::dom::window::Window;
use dom_struct::dom_struct;
#[dom_struct]
pub struct HTMLOptionsCollection {
collection: HTMLCollection,
}
impl HTMLOptionsCollection {
fn new_inherited(
select: &HTMLSelectElement,
filter: Box<dyn CollectionFilter + 'static>,
) -> HTMLOptionsCollection {
HTMLOptionsCollection {
collection: HTMLCollection::new_inherited(select.upcast(), filter),
}
}
pub fn new(
window: &Window,
select: &HTMLSelectElement,
filter: Box<dyn CollectionFilter + 'static>,
) -> DomRoot<HTMLOptionsCollection> {
reflect_dom_object(
Box::new(HTMLOptionsCollection::new_inherited(select, filter)),
window,
HTMLOptionsCollectionBinding::Wrap,
)
}
fn add_new_elements(&self, count: u32) -> ErrorResult {
let root = self.upcast().root_node();
let document = document_from_node(&*root);
for _ in 0..count {
let element = HTMLOptionElement::new(local_name!("option"), None, &document);
let node = element.upcast::<Node>();
root.AppendChild(node)?;
}
Ok(())
}
}
impl HTMLOptionsCollectionMethods for HTMLOptionsCollection {
// FIXME: This shouldn't need to be implemented here since HTMLCollection (the parent of
// HTMLOptionsCollection) implements NamedGetter.
// https://github.com/servo/servo/issues/5875
//
// https://dom.spec.whatwg.org/#dom-htmlcollection-nameditem
fn NamedGetter(&self, name: DOMString) -> Option<DomRoot<Element>> {
self.upcast().NamedItem(name)
}
// https://heycam.github.io/webidl/#dfn-supported-property-names
fn SupportedPropertyNames(&self) -> Vec<DOMString> {
self.upcast().SupportedPropertyNames()
}
// FIXME: This shouldn't need to be implemented here since HTMLCollection (the parent of
// HTMLOptionsCollection) implements IndexedGetter.
// https://github.com/servo/servo/issues/5875
//
// https://dom.spec.whatwg.org/#dom-htmlcollection-item
fn IndexedGetter(&self, index: u32) -> Option<DomRoot<Element>> {
self.upcast().IndexedGetter(index)
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-setter
fn IndexedSetter(&self, index: u32, value: Option<&HTMLOptionElement>) -> ErrorResult {
if let Some(value) = value {
// Step 2
let length = self.upcast().Length();
// Step 3
let n = index as i32 - length as i32;
// Step 4
if n > 0 {
self.add_new_elements(n as u32)?;
}
// Step 5
let node = value.upcast::<Node>();
let root = self.upcast().root_node();
if n >= 0 {
Node::pre_insert(node, &root, None).map(|_| ())
} else {
let child = self.upcast().IndexedGetter(index).unwrap();
let child_node = child.upcast::<Node>();
root.ReplaceChild(node, child_node).map(|_| ())
}
} else {
// Step 1
self.Remove(index as i32);
Ok(())
}
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-length
fn Length(&self) -> u32 {
self.upcast().Length()
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-length
fn SetLength(&self, length: u32) {
let current_length = self.upcast().Length();
let delta = length as i32 - current_length as i32;
if delta < 0 {
// new length is lower - deleting last option elements
for index in (length..current_length).rev() {
self.Remove(index as i32)
}
} else if delta > 0 {
// new length is higher - adding new option elements
self.add_new_elements(delta as u32).unwrap();
}
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-add
fn Add(
&self,
element: HTMLOptionElementOrHTMLOptGroupElement,
before: Option<HTMLElementOrLong>,
) -> ErrorResult {
let root = self.upcast().root_node();
let node: &Node = match element {
HTMLOptionElementOrHTMLOptGroupElement::HTMLOptionElement(ref element) => {
element.upcast()
},
HTMLOptionElementOrHTMLOptGroupElement::HTMLOptGroupElement(ref element) => {
element.upcast()
},
};
// Step 1
if node.is_ancestor_of(&root) {
return Err(Error::HierarchyRequest);
}
if let Some(HTMLElementOrLong::HTMLElement(ref before_element)) = before {
// Step 2
let before_node = before_element.upcast::<Node>();
if !root.is_ancestor_of(before_node) {
return Err(Error::NotFound);
}
// Step 3
if node == before_node {
return Ok(());
}
}
// Step 4
let reference_node = before.and_then(|before| match before {
HTMLElementOrLong::HTMLElement(element) => Some(DomRoot::upcast::<Node>(element)),
HTMLElementOrLong::Long(index) => self
.upcast()
.IndexedGetter(index as u32)
.map(DomRoot::upcast::<Node>),
});
// Step 5
let parent = if let Some(ref reference_node) = reference_node {
reference_node.GetParentNode().unwrap()
} else {
root
};
// Step 6
Node::pre_insert(node, &parent, reference_node.deref()).map(|_| ())
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-remove
fn Remove(&self, index: i32) {
if let Some(element) = self.upcast().IndexedGetter(index as u32) {
element.Remove();
}
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-selectedindex
fn SelectedIndex(&self) -> i32 {
self.upcast()
.root_node()
.downcast::<HTMLSelectElement>()
.expect("HTMLOptionsCollection not rooted on a HTMLSelectElement")
.SelectedIndex()
}
// https://html.spec.whatwg.org/multipage/#dom-htmloptionscollection-selectedindex
fn SetSelectedIndex(&self, index: i32) {
self.upcast()
.root_node()
.downcast::<HTMLSelectElement>()
.expect("HTMLOptionsCollection not rooted on a HTMLSelectElement")
.SetSelectedIndex(index)
}
}
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