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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::Bindings::HTMLCanvasElementBinding;
use dom::bindings::codegen::Bindings::HTMLCanvasElementBinding::HTMLCanvasElementMethods;
use dom::bindings::codegen::InheritTypes::HTMLCanvasElementDerived;
use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast};
use dom::bindings::global::Window;
use dom::bindings::js::{MutNullableJS, JSRef, Temporary, OptionalSettable};
use dom::bindings::utils::{Reflectable, Reflector};
use dom::canvasrenderingcontext2d::CanvasRenderingContext2D;
use dom::document::Document;
use dom::element::{Element, HTMLCanvasElementTypeId, AttributeHandlers};
use dom::eventtarget::{EventTarget, NodeTargetTypeId};
use dom::htmlelement::HTMLElement;
use dom::node::{Node, ElementNodeTypeId, window_from_node};
use dom::virtualmethods::VirtualMethods;
use servo_util::str::{DOMString, parse_unsigned_integer};
use string_cache::Atom;
use geom::size::Size2D;
use std::cell::Cell;
use std::default::Default;
static DefaultWidth: u32 = 300;
static DefaultHeight: u32 = 150;
#[jstraceable]
#[must_root]
#[privatize]
pub struct HTMLCanvasElement {
htmlelement: HTMLElement,
context: MutNullableJS<CanvasRenderingContext2D>,
width: Cell<u32>,
height: Cell<u32>,
}
impl HTMLCanvasElementDerived for EventTarget {
fn is_htmlcanvaselement(&self) -> bool {
*self.type_id() == NodeTargetTypeId(ElementNodeTypeId(HTMLCanvasElementTypeId))
}
}
impl HTMLCanvasElement {
fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> HTMLCanvasElement {
HTMLCanvasElement {
htmlelement: HTMLElement::new_inherited(HTMLCanvasElementTypeId, localName, prefix, document),
context: Default::default(),
width: Cell::new(DefaultWidth),
height: Cell::new(DefaultHeight),
}
}
#[allow(unrooted_must_root)]
pub fn new(localName: DOMString, prefix: Option<DOMString>, document: JSRef<Document>) -> Temporary<HTMLCanvasElement> {
let element = HTMLCanvasElement::new_inherited(localName, prefix, document);
Node::reflect_node(box element, document, HTMLCanvasElementBinding::Wrap)
}
}
impl<'a> HTMLCanvasElementMethods for JSRef<'a, HTMLCanvasElement> {
fn Width(self) -> u32 {
self.width.get()
}
fn SetWidth(self, width: u32) {
let elem: JSRef<Element> = ElementCast::from_ref(self);
elem.set_uint_attribute("width", width)
}
fn Height(self) -> u32 {
self.height.get()
}
fn SetHeight(self, height: u32) {
let elem: JSRef<Element> = ElementCast::from_ref(self);
elem.set_uint_attribute("height", height)
}
fn GetContext(self, id: DOMString) -> Option<Temporary<CanvasRenderingContext2D>> {
if id.as_slice() != "2d" {
return None;
}
if self.context.get().is_none() {
let window = window_from_node(self).root();
let (w, h) = (self.width.get() as i32, self.height.get() as i32);
let context = CanvasRenderingContext2D::new(&Window(*window), self, Size2D(w, h));
self.context.assign(Some(context));
}
self.context.get()
}
}
impl<'a> VirtualMethods for JSRef<'a, HTMLCanvasElement> {
fn super_type<'a>(&'a self) -> Option<&'a VirtualMethods> {
let element: &JSRef<HTMLElement> = HTMLElementCast::from_borrowed_ref(self);
Some(element as &VirtualMethods)
}
fn before_remove_attr(&self, name: &Atom, value: DOMString) {
match self.super_type() {
Some(ref s) => s.before_remove_attr(name, value.clone()),
_ => (),
}
let recreate = match name.as_slice() {
"width" => {
self.width.set(DefaultWidth);
true
}
"height" => {
self.height.set(DefaultHeight);
true
}
_ => false,
};
if recreate {
let (w, h) = (self.width.get() as i32, self.height.get() as i32);
match self.context.get() {
Some(ref context) => context.root().recreate(Size2D(w, h)),
None => ()
}
}
}
fn after_set_attr(&self, name: &Atom, value: DOMString) {
match self.super_type() {
Some(ref s) => s.after_set_attr(name, value.clone()),
_ => (),
}
let recreate = match name.as_slice() {
"width" => {
self.width.set(parse_unsigned_integer(value.as_slice().chars()).unwrap_or(DefaultWidth));
true
}
"height" => {
self.height.set(parse_unsigned_integer(value.as_slice().chars()).unwrap_or(DefaultHeight));
true
}
_ => false,
};
if recreate {
let (w, h) = (self.width.get() as i32, self.height.get() as i32);
match self.context.get() {
Some(ref context) => context.root().recreate(Size2D(w, h)),
None => ()
}
}
}
}
impl Reflectable for HTMLCanvasElement {
fn reflector<'a>(&'a self) -> &'a Reflector {
self.htmlelement.reflector()
}
}
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