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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::bindings::codegen::HTMLImageElementBinding;
use dom::bindings::codegen::InheritTypes::{NodeCast, HTMLImageElementDerived};
use dom::bindings::codegen::InheritTypes::{ElementCast};
use dom::bindings::js::JS;
use dom::bindings::error::ErrorResult;
use dom::document::Document;
use dom::element::{Element, HTMLImageElementTypeId};
use dom::eventtarget::{EventTarget, NodeTargetTypeId};
use dom::htmlelement::HTMLElement;
use dom::node::{Node, ElementNodeTypeId, NodeHelpers, window_from_node};
use extra::url::Url;
use servo_util::geometry::to_px;
use layout_interface::{ContentBoxQuery, ContentBoxResponse};
use servo_net::image_cache_task;
use servo_util::url::parse_url;
use servo_util::str::DOMString;
use extra::serialize::{Encoder, Encodable};
#[deriving(Encodable)]
pub struct HTMLImageElement {
htmlelement: HTMLElement,
extra: Untraceable,
}
struct Untraceable {
image: Option<Url>,
}
impl<S: Encoder> Encodable<S> for Untraceable {
fn encode(&self, _s: &mut S) {
}
}
impl HTMLImageElementDerived for EventTarget {
fn is_htmlimageelement(&self) -> bool {
match self.type_id {
NodeTargetTypeId(ElementNodeTypeId(HTMLImageElementTypeId)) => true,
_ => false
}
}
}
impl HTMLImageElement {
pub fn new_inherited(localName: DOMString, document: JS<Document>) -> HTMLImageElement {
HTMLImageElement {
htmlelement: HTMLElement::new_inherited(HTMLImageElementTypeId, localName, document),
extra: Untraceable {
image: None,
}
}
}
pub fn new(localName: DOMString, document: &JS<Document>) -> JS<HTMLImageElement> {
let element = HTMLImageElement::new_inherited(localName, document.clone());
Node::reflect_node(~element, document, HTMLImageElementBinding::Wrap)
}
}
impl 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(&mut self, value: Option<DOMString>, url: Option<Url>) {
let elem = &mut self.htmlelement.element;
let document = elem.node.owner_doc();
let window = document.get().window.get();
let image_cache = &window.image_cache_task;
match value {
None => {
self.extra.image = None;
}
Some(src) => {
let img_url = parse_url(src, url);
self.extra.image = 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));
}
}
}
pub fn AfterSetAttr(&mut self, name: DOMString, value: DOMString) {
if "src" == name {
let document = self.htmlelement.element.node.owner_doc();
let window = document.get().window.get();
let url = Some(window.get_url());
self.update_image(Some(value), url);
}
}
pub fn BeforeRemoveAttr(&mut self, name: DOMString) {
if "src" == name {
self.update_image(None, None);
}
}
pub fn Alt(&self) -> DOMString {
~""
}
pub fn SetAlt(&mut self, _alt: DOMString) -> ErrorResult {
Ok(())
}
pub fn Src(&self, _abstract_self: &JS<HTMLImageElement>) -> DOMString {
~""
}
pub fn SetSrc(&mut self, abstract_self: &JS<HTMLImageElement>, src: DOMString) -> ErrorResult {
let node = &mut self.htmlelement.element;
node.set_attr(&ElementCast::from(abstract_self), ~"src", src.clone());
Ok(())
}
pub fn CrossOrigin(&self) -> DOMString {
~""
}
pub fn SetCrossOrigin(&mut self, _cross_origin: DOMString) -> ErrorResult {
Ok(())
}
pub fn UseMap(&self) -> DOMString {
~""
}
pub fn SetUseMap(&mut self, _use_map: DOMString) -> ErrorResult {
Ok(())
}
pub fn IsMap(&self) -> bool {
false
}
pub fn SetIsMap(&self, _is_map: bool) -> ErrorResult {
Ok(())
}
pub fn Width(&self, abstract_self: &JS<HTMLImageElement>) -> u32 {
let node: JS<Node> = NodeCast::from(abstract_self);
let window = window_from_node(&node);
let page = window.get().page();
let (port, chan) = Chan::new();
let addr = node.to_trusted_node_address();
match page.query_layout(ContentBoxQuery(addr, chan), port) {
ContentBoxResponse(rect) => {
to_px(rect.size.width) as u32
}
}
}
pub fn SetWidth(&mut self, abstract_self: &JS<HTMLImageElement>, width: u32) -> ErrorResult {
let mut elem: JS<Element> = ElementCast::from(abstract_self);
let mut elem_clone = elem.clone();
elem.get_mut().set_attr(&mut elem_clone, ~"width", width.to_str());
Ok(())
}
pub fn Height(&self, abstract_self: &JS<HTMLImageElement>) -> u32 {
let node = &self.htmlelement.element.node;
let doc = node.owner_doc();
let page = doc.get().window.get().page();
let (port, chan) = Chan::new();
let this_node: JS<Node> = NodeCast::from(abstract_self);
let addr = this_node.to_trusted_node_address();
match page.query_layout(ContentBoxQuery(addr, chan), port) {
ContentBoxResponse(rect) => {
to_px(rect.size.height) as u32
}
}
}
pub fn SetHeight(&mut self, abstract_self: &JS<HTMLImageElement>, height: u32) -> ErrorResult {
let node = &mut self.htmlelement.element;
node.set_attr(&ElementCast::from(abstract_self), ~"height", height.to_str());
Ok(())
}
pub fn NaturalWidth(&self) -> u32 {
0
}
pub fn NaturalHeight(&self) -> u32 {
0
}
pub fn Complete(&self) -> bool {
false
}
pub fn Name(&self) -> DOMString {
~""
}
pub fn SetName(&mut self, _name: DOMString) -> ErrorResult {
Ok(())
}
pub fn Align(&self) -> DOMString {
~""
}
pub fn SetAlign(&mut self, _align: DOMString) -> ErrorResult {
Ok(())
}
pub fn Hspace(&self) -> u32 {
0
}
pub fn SetHspace(&mut self, _hspace: u32) -> ErrorResult {
Ok(())
}
pub fn Vspace(&self) -> u32 {
0
}
pub fn SetVspace(&mut self, _vspace: u32) -> ErrorResult {
Ok(())
}
pub fn LongDesc(&self) -> DOMString {
~""
}
pub fn SetLongDesc(&mut self, _longdesc: DOMString) -> ErrorResult {
Ok(())
}
pub fn Border(&self) -> DOMString {
~""
}
pub fn SetBorder(&mut self, _border: DOMString) -> ErrorResult {
Ok(())
}
}
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