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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 dom_struct::dom_struct;
use html5ever::{local_name, namespace_url, ns, LocalName, Prefix};
use js::rust::HandleObject;
use style::attr::AttrValue;
use style::color::AbsoluteColor;

use crate::dom::bindings::codegen::Bindings::HTMLTableSectionElementBinding::HTMLTableSectionElementMethods;
use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use crate::dom::bindings::error::{ErrorResult, Fallible};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::root::{DomRoot, LayoutDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::document::Document;
use crate::dom::element::{Element, LayoutElementHelpers};
use crate::dom::htmlcollection::{CollectionFilter, HTMLCollection};
use crate::dom::htmlelement::HTMLElement;
use crate::dom::htmltablerowelement::HTMLTableRowElement;
use crate::dom::node::{window_from_node, Node};
use crate::dom::virtualmethods::VirtualMethods;

#[dom_struct]
pub struct HTMLTableSectionElement {
    htmlelement: HTMLElement,
}

impl HTMLTableSectionElement {
    fn new_inherited(
        local_name: LocalName,
        prefix: Option<Prefix>,
        document: &Document,
    ) -> HTMLTableSectionElement {
        HTMLTableSectionElement {
            htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
        }
    }

    #[allow(crown::unrooted_must_root)]
    pub fn new(
        local_name: LocalName,
        prefix: Option<Prefix>,
        document: &Document,
        proto: Option<HandleObject>,
    ) -> DomRoot<HTMLTableSectionElement> {
        let n = Node::reflect_node_with_proto(
            Box::new(HTMLTableSectionElement::new_inherited(
                local_name, prefix, document,
            )),
            document,
            proto,
        );

        n.upcast::<Node>().set_weird_parser_insertion_mode();
        n
    }
}

#[derive(JSTraceable)]
struct RowsFilter;
impl CollectionFilter for RowsFilter {
    fn filter(&self, elem: &Element, root: &Node) -> bool {
        elem.is::<HTMLTableRowElement>() &&
            elem.upcast::<Node>().GetParentNode().as_deref() == Some(root)
    }
}

impl HTMLTableSectionElementMethods for HTMLTableSectionElement {
    // https://html.spec.whatwg.org/multipage/#dom-tbody-rows
    fn Rows(&self) -> DomRoot<HTMLCollection> {
        HTMLCollection::create(&window_from_node(self), self.upcast(), Box::new(RowsFilter))
    }

    // https://html.spec.whatwg.org/multipage/#dom-tbody-insertrow
    fn InsertRow(&self, index: i32) -> Fallible<DomRoot<HTMLElement>> {
        let node = self.upcast::<Node>();
        node.insert_cell_or_row(
            index,
            || self.Rows(),
            || HTMLTableRowElement::new(local_name!("tr"), None, &node.owner_doc(), None),
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-tbody-deleterow
    fn DeleteRow(&self, index: i32) -> ErrorResult {
        let node = self.upcast::<Node>();
        node.delete_cell_or_row(index, || self.Rows(), |n| n.is::<HTMLTableRowElement>())
    }
}

pub trait HTMLTableSectionElementLayoutHelpers {
    fn get_background_color(self) -> Option<AbsoluteColor>;
}

impl HTMLTableSectionElementLayoutHelpers for LayoutDom<'_, HTMLTableSectionElement> {
    fn get_background_color(self) -> Option<AbsoluteColor> {
        self.upcast::<Element>()
            .get_attr_for_layout(&ns!(), &local_name!("bgcolor"))
            .and_then(AttrValue::as_color)
            .cloned()
    }
}

impl VirtualMethods for HTMLTableSectionElement {
    fn super_type(&self) -> Option<&dyn VirtualMethods> {
        Some(self.upcast::<HTMLElement>() as &dyn VirtualMethods)
    }

    fn parse_plain_attribute(&self, local_name: &LocalName, value: DOMString) -> AttrValue {
        match *local_name {
            local_name!("bgcolor") => AttrValue::from_legacy_color(value.into()),
            _ => self
                .super_type()
                .unwrap()
                .parse_plain_attribute(local_name, value),
        }
    }
}