servo/components/script/dom/htmlfontelement.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, AttrHelpers};
use dom::bindings::codegen::Bindings::HTMLFontElementBinding;
use dom::bindings::codegen::Bindings::HTMLFontElementBinding::HTMLFontElementMethods;
use dom::bindings::codegen::InheritTypes::{HTMLElementCast, HTMLFontElementDerived};
use dom::bindings::js::Root;
use dom::document::Document;
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::element::ElementTypeId;
use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
use dom::node::{Node, NodeTypeId};
use dom::virtualmethods::VirtualMethods;
use util::str::{self, DOMString};

use cssparser::RGBA;
use std::cell::Cell;

#[dom_struct]
#[derive(HeapSizeOf)]
pub struct HTMLFontElement {
    htmlelement: HTMLElement,
    color: Cell<Option<RGBA>>,
}

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

impl HTMLFontElement {
    fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: &Document) -> HTMLFontElement {
        HTMLFontElement {
            htmlelement: HTMLElement::new_inherited(HTMLElementTypeId::HTMLFontElement, localName, prefix, document),
            color: Cell::new(None),
        }
    }

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

impl<'a> HTMLFontElementMethods for &'a HTMLFontElement {
    make_getter!(Color, "color");
    make_setter!(SetColor, "color");
}

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

    fn after_set_attr(&self, attr: &Attr) {
        if let Some(ref s) = self.super_type() {
            s.after_set_attr(attr);
        }

        match attr.local_name() {
            &atom!("color") => {
                self.color.set(str::parse_legacy_color(&attr.value()).ok())
            }
            _ => {}
        }
    }

    fn before_remove_attr(&self, attr: &Attr) {
        if let Some(ref s) = self.super_type() {
            s.before_remove_attr(attr);
        }

        match attr.local_name() {
            &atom!("color") => self.color.set(None),
            _ => ()
        }
    }
}

pub trait HTMLFontElementHelpers {
    fn get_color(&self) -> Option<RGBA>;
}

impl HTMLFontElementHelpers for HTMLFontElement {
    fn get_color(&self) -> Option<RGBA> {
        self.color.get()
    }
}