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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::WorkerBinding;
use dom::bindings::codegen::Bindings::WorkerBinding::WorkerMethods;
use dom::bindings::codegen::Bindings::EventHandlerBinding::EventHandlerNonNull;
use dom::bindings::codegen::InheritTypes::{EventCast, EventTargetCast};
use dom::bindings::error::{Fallible, ErrorResult};
use dom::bindings::error::Error::Syntax;
use dom::bindings::global::{GlobalRef, GlobalField};
use dom::bindings::refcounted::Trusted;
use dom::bindings::structuredclone::StructuredCloneData;
use dom::bindings::trace::JSTraceable;
use dom::bindings::utils::{Reflectable, reflect_dom_object};
use dom::bindings::js::Root;
use dom::window::WindowHelpers;
use dom::dedicatedworkerglobalscope::DedicatedWorkerGlobalScope;
use dom::errorevent::ErrorEvent;
use dom::event::{Event, EventBubbles, EventCancelable, EventHelpers};
use dom::eventtarget::{EventTarget, EventTargetHelpers, EventTargetTypeId};
use dom::messageevent::MessageEvent;
use script_task::{ScriptChan, ScriptMsg, Runnable};
use devtools_traits::{DevtoolsPageInfo, ScriptToDevtoolsControlMsg};
use util::str::DOMString;
use ipc_channel::ipc;
use js::jsapi::{JSContext, HandleValue, RootedValue};
use js::jsapi::{JSAutoRequest, JSAutoCompartment};
use js::jsval::UndefinedValue;
use url::UrlParser;
use std::borrow::ToOwned;
use std::sync::mpsc::{channel, Sender};
pub type TrustedWorkerAddress = Trusted<Worker>;
// https://html.spec.whatwg.org/multipage/#worker
#[dom_struct]
pub struct Worker {
eventtarget: EventTarget,
global: GlobalField,
/// Sender to the Receiver associated with the DedicatedWorkerGlobalScope
/// this Worker created.
sender: Sender<(TrustedWorkerAddress, ScriptMsg)>,
}
impl Worker {
fn new_inherited(global: GlobalRef, sender: Sender<(TrustedWorkerAddress, ScriptMsg)>) -> Worker {
Worker {
eventtarget: EventTarget::new_inherited(EventTargetTypeId::Worker),
global: GlobalField::from_rooted(&global),
sender: sender,
}
}
pub fn new(global: GlobalRef, sender: Sender<(TrustedWorkerAddress, ScriptMsg)>) -> Root<Worker> {
reflect_dom_object(box Worker::new_inherited(global, sender),
global,
WorkerBinding::Wrap)
}
// https://www.whatwg.org/html/#dom-worker
pub fn Constructor(global: GlobalRef, script_url: DOMString) -> Fallible<Root<Worker>> {
// Step 2-4.
let worker_url = match UrlParser::new().base_url(&global.get_url()).parse(&script_url) {
Ok(url) => url,
Err(_) => return Err(Syntax),
};
let resource_task = global.resource_task();
let constellation_chan = global.constellation_chan();
let (sender, receiver) = channel();
let worker = Worker::new(global, sender.clone());
let worker_ref = Trusted::new(global.get_cx(), worker.r(), global.script_chan());
if let Some(ref chan) = global.devtools_chan() {
let pipeline_id = global.pipeline();
let (devtools_sender, _) = ipc::channel().unwrap();
let title = format!("Worker for {}", worker_url);
let page_info = DevtoolsPageInfo {
title: title,
url: worker_url.clone(),
};
let worker_id = global.get_next_worker_id();
chan.send(ScriptToDevtoolsControlMsg::NewGlobal((pipeline_id, Some(worker_id)),
devtools_sender.clone(),
page_info)).unwrap();
}
DedicatedWorkerGlobalScope::run_worker_scope(
worker_url, global.pipeline(), global.mem_profiler_chan(), global.devtools_chan(),
worker_ref, resource_task, constellation_chan, global.script_chan(), sender, receiver);
Ok(worker)
}
pub fn handle_message(address: TrustedWorkerAddress,
data: StructuredCloneData) {
let worker = address.root();
let global = worker.r().global.root();
let target = EventTargetCast::from_ref(worker.r());
let _ar = JSAutoRequest::new(global.r().get_cx());
let _ac = JSAutoCompartment::new(global.r().get_cx(), target.reflector().get_jsobject().get());
let mut message = RootedValue::new(global.r().get_cx(), UndefinedValue());
data.read(global.r(), message.handle_mut());
MessageEvent::dispatch_jsval(target, global.r(), message.handle());
}
pub fn dispatch_simple_error(address: TrustedWorkerAddress) {
let worker = address.root();
let global = worker.r().global.root();
let target = EventTargetCast::from_ref(worker.r());
let event = Event::new(global.r(),
"error".to_owned(),
EventBubbles::DoesNotBubble,
EventCancelable::NotCancelable);
event.r().fire(target);
}
pub fn handle_error_message(address: TrustedWorkerAddress, message: DOMString,
filename: DOMString, lineno: u32, colno: u32) {
let worker = address.root();
let global = worker.r().global.root();
let error = RootedValue::new(global.r().get_cx(), UndefinedValue());
let target = EventTargetCast::from_ref(worker.r());
let errorevent = ErrorEvent::new(global.r(), "error".to_owned(),
EventBubbles::Bubbles, EventCancelable::Cancelable,
message, filename, lineno, colno, error.handle());
let event = EventCast::from_ref(errorevent.r());
event.fire(target);
}
}
impl<'a> WorkerMethods for &'a Worker {
fn PostMessage(self, cx: *mut JSContext, message: HandleValue) -> ErrorResult {
let data = try!(StructuredCloneData::write(cx, message));
let address = Trusted::new(cx, self, self.global.root().r().script_chan().clone());
self.sender.send((address, ScriptMsg::DOMMessage(data))).unwrap();
Ok(())
}
event_handler!(message, GetOnmessage, SetOnmessage);
}
pub struct WorkerMessageHandler {
addr: TrustedWorkerAddress,
data: StructuredCloneData,
}
impl WorkerMessageHandler {
pub fn new(addr: TrustedWorkerAddress, data: StructuredCloneData) -> WorkerMessageHandler {
WorkerMessageHandler {
addr: addr,
data: data,
}
}
}
impl Runnable for WorkerMessageHandler {
fn handler(self: Box<WorkerMessageHandler>) {
let this = *self;
Worker::handle_message(this.addr, this.data);
}
}
pub struct WorkerEventHandler {
addr: TrustedWorkerAddress,
}
impl WorkerEventHandler {
pub fn new(addr: TrustedWorkerAddress) -> WorkerEventHandler {
WorkerEventHandler {
addr: addr
}
}
}
impl Runnable for WorkerEventHandler {
fn handler(self: Box<WorkerEventHandler>) {
let this = *self;
Worker::dispatch_simple_error(this.addr);
}
}
pub struct WorkerErrorHandler {
addr: TrustedWorkerAddress,
msg: DOMString,
file_name: DOMString,
line_num: u32,
col_num: u32,
}
impl WorkerErrorHandler {
pub fn new(addr: TrustedWorkerAddress, msg: DOMString, file_name: DOMString, line_num: u32, col_num: u32)
-> WorkerErrorHandler {
WorkerErrorHandler {
addr: addr,
msg: msg,
file_name: file_name,
line_num: line_num,
col_num: col_num,
}
}
}
impl Runnable for WorkerErrorHandler {
fn handler(self: Box<WorkerErrorHandler>) {
let this = *self;
Worker::handle_error_message(this.addr, this.msg, this.file_name, this.line_num, this.col_num);
}
}
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