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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 http://mozilla.org/MPL/2.0/. */
use dom::attr::AttrValue;
use dom::bindings::codegen::Bindings::HTMLImageElementBinding;
use dom::bindings::codegen::Bindings::HTMLImageElementBinding::HTMLImageElementMethods;
use dom::bindings::codegen::InheritTypes::{NodeCast, ElementCast, HTMLElementCast, HTMLImageElementDerived};
use dom::bindings::js::{JS, JSRef, Temporary};
use dom::bindings::utils::{Reflectable, Reflector};
use dom::document::Document;
use dom::element::{Element, HTMLImageElementTypeId};
use dom::element::AttributeHandlers;
use dom::eventtarget::{EventTarget, NodeTargetTypeId};
use dom::htmlelement::HTMLElement;
use dom::node::{Node, ElementNodeTypeId, NodeHelpers, window_from_node};
use dom::virtualmethods::VirtualMethods;
use servo_net::image_cache_task;
use servo_util::geometry::to_px;
use servo_util::str::DOMString;
use string_cache::Atom;
use url::{Url, UrlParser};
use std::cell::RefCell;
#[jstraceable]
#[must_root]
#[privatize]
pub struct HTMLImageElement {
htmlelement: HTMLElement,
image: RefCell<Option<Url>>,
}
impl HTMLImageElementDerived for EventTarget {
fn is_htmlimageelement(&self) -> bool {
self.type_id == NodeTargetTypeId(ElementNodeTypeId(HTMLImageElementTypeId))
}
}
trait PrivateHTMLImageElementHelpers {
fn update_image(self, value: Option<(DOMString, &Url)>);
}
impl<'a> PrivateHTMLImageElementHelpers for JSRef<'a, HTMLImageElement> {
/// Makes the local `image` member match the status of the `src` attribute and starts
/// prefetching the image. This method must be called after `src` is changed.
fn update_image(self, value: Option<(DOMString, &Url)>) {
let node: JSRef<Node> = NodeCast::from_ref(self);
let document = node.owner_doc().root();
let window = document.window.root();
let image_cache = &window.image_cache_task;
match value {
None => {
*self.image.borrow_mut() = None;
}
Some((src, base_url)) => {
let img_url = UrlParser::new().base_url(base_url).parse(src.as_slice());
// FIXME: handle URL parse errors more gracefully.
let img_url = img_url.unwrap();
*self.image.borrow_mut() = Some(img_url.clone());
// inform the image cache to load this, but don't store a
// handle.
//
// TODO (Issue #84): don't prefetch if we are within a
// <noscript> tag.
image_cache.send(image_cache_task::Prefetch(img_url));
}
}
}
}
impl HTMLImageElement {
fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLImageElement {
HTMLImageElement {
htmlelement: HTMLElement::new_inherited(HTMLImageElementTypeId, localName, prefix, document),
image: RefCell::new(None),
}
}
#[allow(unrooted_must_root)]
pub fn new(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> Temporary<HTMLImageElement> {
let element = HTMLImageElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLImageElementBinding::Wrap)
}
}
pub trait LayoutHTMLImageElementHelpers {
unsafe fn image(&self) -> Option<Url>;
}
impl LayoutHTMLImageElementHelpers for JS<HTMLImageElement> {
unsafe fn image(&self) -> Option<Url> {
(*self.unsafe_get()).image.borrow().clone()
}
}
impl<'a> HTMLImageElementMethods for JSRef<'a, HTMLImageElement> {
make_getter!(Alt)
make_setter!(SetAlt, "alt")
make_url_getter!(Src)
make_setter!(SetSrc, "src")
make_getter!(UseMap)
make_setter!(SetUseMap, "usemap")
make_bool_getter!(IsMap)
fn SetIsMap(self, is_map: bool) {
let element: JSRef<Element> = ElementCast::from_ref(self);
element.set_string_attribute("ismap", is_map.to_string())
}
fn Width(self) -> u32 {
let node: JSRef<Node> = NodeCast::from_ref(self);
let rect = node.get_bounding_content_box();
to_px(rect.size.width) as u32
}
fn SetWidth(self, width: u32) {
let elem: JSRef<Element> = ElementCast::from_ref(self);
elem.set_uint_attribute("width", width)
}
fn Height(self) -> u32 {
let node: JSRef<Node> = NodeCast::from_ref(self);
let rect = node.get_bounding_content_box();
to_px(rect.size.height) as u32
}
fn SetHeight(self, height: u32) {
let elem: JSRef<Element> = ElementCast::from_ref(self);
elem.set_uint_attribute("height", height)
}
make_getter!(Name)
make_setter!(SetName, "name")
make_getter!(Align)
make_setter!(SetAlign, "align")
make_uint_getter!(Hspace)
make_uint_setter!(SetHspace, "hspace")
make_uint_getter!(Vspace)
make_uint_setter!(SetVspace, "vspace")
make_getter!(LongDesc)
make_setter!(SetLongDesc, "longdesc")
make_getter!(Border)
make_setter!(SetBorder, "border")
}
impl<'a> VirtualMethods for JSRef<'a, HTMLImageElement> {
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, name: &Atom, value: DOMString) {
match self.super_type() {
Some(ref s) => s.after_set_attr(name, value.clone()),
_ => (),
}
if "src" == name.as_slice() {
let window = window_from_node(*self).root();
let url = window.get_url();
self.update_image(Some((value, &url)));
}
}
fn before_remove_attr(&self, name: &Atom, value: DOMString) {
match self.super_type() {
Some(ref s) => s.before_remove_attr(name, value.clone()),
_ => (),
}
if "src" == name.as_slice() {
self.update_image(None);
}
}
fn parse_plain_attribute(&self, name: &str, value: DOMString) -> AttrValue {
match name {
"width" | "height" | "hspace" | "vspace" => AttrValue::from_u32(value, 0),
_ => self.super_type().unwrap().parse_plain_attribute(name, value),
}
}
}
impl Reflectable for HTMLImageElement {
fn reflector<'a>(&'a self) -> &'a Reflector {
self.htmlelement.reflector()
}
}
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