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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::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::VRBinding;
use dom::bindings::codegen::Bindings::VRBinding::VRMethods;
use dom::bindings::error::Error;
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{JS, Root};
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::event::Event;
use dom::eventtarget::EventTarget;
use dom::globalscope::GlobalScope;
use dom::promise::Promise;
use dom::vrdisplay::VRDisplay;
use dom::vrdisplayevent::VRDisplayEvent;
use ipc_channel::ipc;
use ipc_channel::ipc::IpcSender;
use script_traits::WebVREventMsg;
use std::rc::Rc;
use webvr_traits::WebVRMsg;
use webvr_traits::webvr;
#[dom_struct]
pub struct VR {
eventtarget: EventTarget,
displays: DOMRefCell<Vec<JS<VRDisplay>>>
}
impl VR {
fn new_inherited() -> VR {
VR {
eventtarget: EventTarget::new_inherited(),
displays: DOMRefCell::new(Vec::new())
}
}
pub fn new(global: &GlobalScope) -> Root<VR> {
let root = reflect_dom_object(box VR::new_inherited(),
global,
VRBinding::Wrap);
root.register();
root
}
}
impl Drop for VR {
fn drop(&mut self) {
self.unregister();
}
}
impl VRMethods for VR {
#[allow(unrooted_must_root)]
// https://w3c.github.io/webvr/#interface-navigator
fn GetDisplays(&self) -> Rc<Promise> {
let promise = Promise::new(&self.global());
if let Some(webvr_thread) = self.webvr_thread() {
let (sender, receiver) = ipc::channel().unwrap();
webvr_thread.send(WebVRMsg::GetDisplays(sender)).unwrap();
match receiver.recv().unwrap() {
Ok(displays) => {
// Sync displays
for display in displays {
self.sync_display(&display);
}
},
Err(e) => {
promise.reject_native(promise.global().get_cx(), &e);
return promise;
}
}
} else {
// WebVR spec: The Promise MUST be rejected if WebVR is not enabled/supported.
promise.reject_error(promise.global().get_cx(), Error::Security);
return promise;
}
// convert from JS to Root
let displays: Vec<Root<VRDisplay>> = self.displays.borrow().iter()
.map(|d| Root::from_ref(&**d))
.collect();
promise.resolve_native(promise.global().get_cx(), &displays);
promise
}
}
impl VR {
fn webvr_thread(&self) -> Option<IpcSender<WebVRMsg>> {
self.global().as_window().webvr_thread()
}
fn find_display(&self, display_id: u64) -> Option<Root<VRDisplay>> {
self.displays.borrow()
.iter()
.find(|d| d.get_display_id() == display_id)
.map(|d| Root::from_ref(&**d))
}
fn register(&self) {
if let Some(webvr_thread) = self.webvr_thread() {
let msg = WebVRMsg::RegisterContext(self.global().pipeline_id());
webvr_thread.send(msg).unwrap();
}
}
fn unregister(&self) {
if let Some(webvr_thread) = self.webvr_thread() {
let msg = WebVRMsg::UnregisterContext(self.global().pipeline_id());
webvr_thread.send(msg).unwrap();
}
}
fn sync_display(&self, display: &webvr::VRDisplayData) -> Root<VRDisplay> {
if let Some(existing) = self.find_display(display.display_id) {
existing.update_display(&display);
existing
} else {
let root = VRDisplay::new(&self.global(), display.clone());
self.displays.borrow_mut().push(JS::from_ref(&*root));
root
}
}
pub fn handle_webvr_event(&self, event: WebVREventMsg) {
let WebVREventMsg::DisplayEvent(event) = event;
match &event {
&webvr::VRDisplayEvent::Connect(ref display) => {
let display = self.sync_display(&display);
display.handle_webvr_event(&event);
self.notify_event(&display, &event);
},
&webvr::VRDisplayEvent::Disconnect(id) => {
if let Some(display) = self.find_display(id) {
display.handle_webvr_event(&event);
self.notify_event(&display, &event);
}
},
&webvr::VRDisplayEvent::Activate(ref display, _) |
&webvr::VRDisplayEvent::Deactivate(ref display, _) |
&webvr::VRDisplayEvent::Blur(ref display) |
&webvr::VRDisplayEvent::Focus(ref display) |
&webvr::VRDisplayEvent::PresentChange(ref display, _) |
&webvr::VRDisplayEvent::Change(ref display) => {
let display = self.sync_display(&display);
display.handle_webvr_event(&event);
}
};
}
fn notify_event(&self, display: &VRDisplay, event: &webvr::VRDisplayEvent) {
let event = VRDisplayEvent::new_from_webvr(&self.global(), &display, &event);
event.upcast::<Event>().fire(self.upcast());
}
}
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