servo/components/script/dom/htmlfieldsetelement.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;
use dom::attr::AttrHelpers;
use dom::bindings::codegen::Bindings::HTMLFieldSetElementBinding;
use dom::bindings::codegen::Bindings::HTMLFieldSetElementBinding::HTMLFieldSetElementMethods;
use dom::bindings::codegen::InheritTypes::{HTMLFieldSetElementDerived, NodeCast};
use dom::bindings::codegen::InheritTypes::{HTMLElementCast, HTMLLegendElementDerived};
use dom::bindings::js::{JSRef, Temporary};
use dom::document::Document;
use dom::element::{AttributeHandlers, Element, ElementHelpers, ElementTypeId};
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::htmlcollection::{HTMLCollection, CollectionFilter};
use dom::htmlelement::HTMLElement;
use dom::node::{DisabledStateHelpers, Node, NodeHelpers, NodeTypeId, window_from_node};
use dom::validitystate::ValidityState;
use dom::virtualmethods::VirtualMethods;

use servo_util::str::{DOMString, StaticStringVec};
use string_cache::Atom;

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

impl HTMLFieldSetElementDerived for EventTarget {
    fn is_htmlfieldsetelement(&self) -> bool {
        *self.type_id() == EventTargetTypeId::Node(NodeTypeId::Element(ElementTypeId::HTMLFieldSetElement))
    }
}

impl HTMLFieldSetElement {
    fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLFieldSetElement {
        HTMLFieldSetElement {
            htmlelement: HTMLElement::new_inherited(ElementTypeId::HTMLFieldSetElement, localName, prefix, document)
        }
    }

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

impl<'a> HTMLFieldSetElementMethods for JSRef<'a, HTMLFieldSetElement> {
    // http://www.whatwg.org/html/#dom-fieldset-elements
    fn Elements(self) -> Temporary<HTMLCollection> {
        #[jstraceable]
        struct ElementsFilter;
        impl CollectionFilter for ElementsFilter {
            fn filter<'a>(&self, elem: JSRef<'a, Element>, _root: JSRef<'a, Node>) -> bool {
                static TAG_NAMES: StaticStringVec = &["button", "fieldset", "input",
                    "keygen", "object", "output", "select", "textarea"];
                TAG_NAMES.iter().any(|&tag_name| tag_name == elem.local_name().as_slice())
            }
        }
        let node: JSRef<Node> = NodeCast::from_ref(self);
        let filter = box ElementsFilter;
        let window = window_from_node(node).root();
        HTMLCollection::create(window.r(), node, filter)
    }

    fn Validity(self) -> Temporary<ValidityState> {
        let window = window_from_node(self).root();
        ValidityState::new(window.r())
    }

    // http://www.whatwg.org/html/#dom-fieldset-disabled
    make_bool_getter!(Disabled)

    // http://www.whatwg.org/html/#dom-fieldset-disabled
    make_bool_setter!(SetDisabled, "disabled")
}

impl<'a> VirtualMethods for JSRef<'a, HTMLFieldSetElement> {
    fn super_type<'a>(&'a self) -> Option<&'a VirtualMethods> {
        let htmlelement: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
        Some(htmlelement as &VirtualMethods)
    }

    fn after_set_attr(&self, attr: JSRef<Attr>) {
        match self.super_type() {
            Some(ref s) => s.after_set_attr(attr),
            _ => ()
        }

        match attr.local_name() {
            &atom!("disabled") => {
                let node: JSRef<Node> = NodeCast::from_ref(*self);
                node.set_disabled_state(true);
                node.set_enabled_state(false);
                let maybe_legend = node.children().find(|node| node.is_htmllegendelement());
                let filtered: Vec<JSRef<Node>> = node.children().filter(|child| {
                    maybe_legend.map_or(true, |legend| legend != *child)
                }).collect();
                for descendant in filtered.iter().flat_map(|child| child.traverse_preorder()) {
                    match descendant.type_id() {
                        NodeTypeId::Element(ElementTypeId::HTMLButtonElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLInputElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLSelectElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLTextAreaElement) => {
                            descendant.set_disabled_state(true);
                            descendant.set_enabled_state(false);
                        },
                        _ => ()
                    }
                }
            },
            _ => ()
        }
    }

    fn before_remove_attr(&self, attr: JSRef<Attr>) {
        match self.super_type() {
            Some(ref s) => s.before_remove_attr(attr),
            _ => ()
        }

        match attr.local_name() {
            &atom!("disabled") => {
                let node: JSRef<Node> = NodeCast::from_ref(*self);
                node.set_disabled_state(false);
                node.set_enabled_state(true);
                let maybe_legend = node.children().find(|node| node.is_htmllegendelement());
                let filtered: Vec<JSRef<Node>> = node.children().filter(|child| {
                    maybe_legend.map_or(true, |legend| legend != *child)
                }).collect();
                for descendant in filtered.iter().flat_map(|child| child.traverse_preorder()) {
                    match descendant.type_id() {
                        NodeTypeId::Element(ElementTypeId::HTMLButtonElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLInputElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLSelectElement) |
                        NodeTypeId::Element(ElementTypeId::HTMLTextAreaElement) => {
                            descendant.check_disabled_attribute();
                            descendant.check_ancestors_disabled_state_for_form_control();
                        },
                        _ => ()
                    }
                }
            },
            _ => ()
        }
    }
}