servo/components/script/dom/htmlselectelement.rs

/* 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, AttrValue};
use dom::bindings::codegen::Bindings::HTMLSelectElementBinding;
use dom::bindings::codegen::Bindings::HTMLSelectElementBinding::HTMLSelectElementMethods;
use dom::bindings::codegen::InheritTypes::{HTMLElementCast, NodeCast};
use dom::bindings::codegen::InheritTypes::{HTMLSelectElementDerived, HTMLFieldSetElementDerived};
use dom::bindings::codegen::UnionTypes::HTMLElementOrLong;
use dom::bindings::codegen::UnionTypes::HTMLOptionElementOrHTMLOptGroupElement;
use dom::bindings::js::Root;
use dom::document::Document;
use dom::element::{AttributeMutation, ElementTypeId};
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
use dom::node::{Node, NodeTypeId, window_from_node};
use dom::validitystate::ValidityState;
use dom::virtualmethods::VirtualMethods;

use string_cache::Atom;
use util::str::DOMString;

use std::borrow::ToOwned;

#[dom_struct]
pub struct HTMLSelectElement {
    htmlelement: HTMLElement
}

impl HTMLSelectElementDerived for EventTarget {
    fn is_htmlselectelement(&self) -> bool {
        *self.type_id() ==
            EventTargetTypeId::Node(
                NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)))
    }
}

static DEFAULT_SELECT_SIZE: u32 = 0;

impl HTMLSelectElement {
    fn new_inherited(localName: DOMString,
                     prefix: Option<DOMString>,
                     document: &Document) -> HTMLSelectElement {
        HTMLSelectElement {
            htmlelement:
                HTMLElement::new_inherited(HTMLElementTypeId::HTMLSelectElement, localName, prefix, document)
        }
    }

    #[allow(unrooted_must_root)]
    pub fn new(localName: DOMString,
               prefix: Option<DOMString>,
               document: &Document) -> Root<HTMLSelectElement> {
        let element = HTMLSelectElement::new_inherited(localName, prefix, document);
        Node::reflect_node(box element, document, HTMLSelectElementBinding::Wrap)
    }
}

impl HTMLSelectElementMethods for HTMLSelectElement {
    // https://html.spec.whatwg.org/multipage/#dom-cva-validity
    fn Validity(&self) -> Root<ValidityState> {
        let window = window_from_node(self);
        ValidityState::new(window.r())
    }

    // Note: this function currently only exists for test_union.html.
    // https://html.spec.whatwg.org/multipage/#dom-select-add
    fn Add(&self, _element: HTMLOptionElementOrHTMLOptGroupElement, _before: Option<HTMLElementOrLong>) {
    }

    // https://www.whatwg.org/html/#dom-fe-disabled
    make_bool_getter!(Disabled);

    // https://www.whatwg.org/html/#dom-fe-disabled
    make_bool_setter!(SetDisabled, "disabled");

    // https://html.spec.whatwg.org/multipage/#dom-select-multiple
    make_bool_getter!(Multiple);

    // https://html.spec.whatwg.org/multipage/#dom-select-multiple
    make_bool_setter!(SetMultiple, "multiple");

    // https://html.spec.whatwg.org/multipage/#dom-fe-name
    make_getter!(Name);

    // https://html.spec.whatwg.org/multipage/#dom-fe-name
    make_setter!(SetName, "name");

    // https://html.spec.whatwg.org/multipage/#dom-select-size
    make_uint_getter!(Size, "size", DEFAULT_SELECT_SIZE);

    // https://html.spec.whatwg.org/multipage/#dom-select-size
    make_uint_setter!(SetSize, "size", DEFAULT_SELECT_SIZE);

    // https://html.spec.whatwg.org/multipage/#dom-select-type
    fn Type(&self) -> DOMString {
        if self.Multiple() {
            "select-multiple".to_owned()
        } else {
            "select-one".to_owned()
        }
    }
}

impl VirtualMethods for HTMLSelectElement {
    fn super_type<'b>(&'b self) -> Option<&'b VirtualMethods> {
        let htmlelement: &HTMLElement = HTMLElementCast::from_ref(self);
        Some(htmlelement as &VirtualMethods)
    }

    fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation) {
        self.super_type().unwrap().attribute_mutated(attr, mutation);
        if attr.local_name() == &atom!(disabled) {
            let node = NodeCast::from_ref(self);
            match mutation {
                AttributeMutation::Set(_) => {
                    node.set_disabled_state(true);
                    node.set_enabled_state(false);
                },
                AttributeMutation::Removed => {
                    node.set_disabled_state(false);
                    node.set_enabled_state(true);
                    node.check_ancestors_disabled_state_for_form_control();
                }
            }
        }
    }

    fn bind_to_tree(&self, tree_in_doc: bool) {
        if let Some(ref s) = self.super_type() {
            s.bind_to_tree(tree_in_doc);
        }

        let node = NodeCast::from_ref(self);
        node.check_ancestors_disabled_state_for_form_control();
    }

    fn unbind_from_tree(&self, tree_in_doc: bool) {
        if let Some(ref s) = self.super_type() {
            s.unbind_from_tree(tree_in_doc);
        }

        let node = NodeCast::from_ref(self);
        if node.ancestors().any(|ancestor| ancestor.r().is_htmlfieldsetelement()) {
            node.check_ancestors_disabled_state_for_form_control();
        } else {
            node.check_disabled_attribute();
        }
    }

    fn parse_plain_attribute(&self, local_name: &Atom, value: DOMString) -> AttrValue {
        match local_name {
            &atom!("size") => AttrValue::from_u32(value, DEFAULT_SELECT_SIZE),
            _ => self.super_type().unwrap().parse_plain_attribute(local_name, value),
        }
    }
}