Auto merge of #12682 - creativcoder:fire-fetch, r=jdm

Dispatch lifecycle events to service worker object and refactor html tests

<!-- Please describe your changes on the following line: -->

Changes introduced to dispatch `controllerchange`, `activate` and `fetch` simple events to Service Worker interfaces. The html tests under `tests/html/service-workers` was also updated to demo the changes.
r? @jdm

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

<!-- Either: -->
- [X] These changes do not require tests because refactor.
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components/script/dom/serviceworkercontainer.rs

@@ -6,6 +6,7 @@ use dom::bindings::codegen::Bindings::ServiceWorkerContainerBinding::Registratio
 use dom::bindings::codegen::Bindings::ServiceWorkerContainerBinding::{ServiceWorkerContainerMethods, Wrap};
 use dom::bindings::error::{Error, Fallible};
 use dom::bindings::global::GlobalRef;
+use dom::bindings::inheritance::Castable;
 use dom::bindings::js::{JS, MutNullableHeap, Root};
 use dom::bindings::reflector::{Reflectable, reflect_dom_object};
 use dom::bindings::str::USVString;
@@ -41,7 +42,8 @@ pub trait Controllable {
 
 impl Controllable for ServiceWorkerContainer {
     fn set_controller(&self, active_worker: &ServiceWorker) {
-        self.controller.set(Some(active_worker))
+        self.controller.set(Some(active_worker));
+        self.upcast::<EventTarget>().fire_simple_event("controllerchange");
     }
 }
 

components/script/dom/serviceworkerglobalscope.rs

@@ -15,6 +15,7 @@ use dom::bindings::js::{Root, RootCollection};
 use dom::bindings::refcounted::LiveDOMReferences;
 use dom::bindings::reflector::Reflectable;
 use dom::bindings::str::DOMString;
+use dom::eventtarget::EventTarget;
 use dom::messageevent::MessageEvent;
 use dom::serviceworker::TrustedServiceWorkerAddress;
 use dom::workerglobalscope::WorkerGlobalScope;
@@ -161,11 +162,9 @@ impl ServiceWorkerGlobalScope {
 
             let (devtools_mpsc_chan, devtools_mpsc_port) = channel();
             ROUTER.route_ipc_receiver_to_mpsc_sender(devtools_receiver, devtools_mpsc_chan);
-
             // TODO XXXcreativcoder use this timer_ipc_port, when we have a service worker instance here
             let (timer_ipc_chan, _timer_ipc_port) = ipc::channel().unwrap();
             let (timer_chan, timer_port) = channel();
-
             let global = ServiceWorkerGlobalScope::new(
                 init, url, pipeline_id, devtools_mpsc_port, runtime,
                 own_sender, receiver,
@@ -178,7 +177,6 @@ impl ServiceWorkerGlobalScope {
             }
 
             scope.execute_script(DOMString::from(source));
-
             // Service workers are time limited
             spawn_named("SWTimeoutThread".to_owned(), move || {
                 let sw_lifetime_timeout = PREFS.get("dom.serviceworker.timeout_seconds").as_u64().unwrap();
@@ -186,6 +184,7 @@ impl ServiceWorkerGlobalScope {
                 let _ = timer_chan.send(());
             });
 
+            scope.upcast::<EventTarget>().fire_simple_event("activate");
             let reporter_name = format!("service-worker-reporter-{}", random::<u64>());
             scope.mem_profiler_chan().run_with_memory_reporting(|| {
                 while let Ok(event) = global.receive_event() {
@@ -250,6 +249,10 @@ impl ServiceWorkerGlobalScope {
                 reports_chan.send(reports);
             },
             Response(mediator) => {
+                // TODO XXXcreativcoder This will eventually use a FetchEvent interface to fire event
+                // when we have the Request and Response dom api's implemented
+                // https://slightlyoff.github.io/ServiceWorker/spec/service_worker_1/index.html#fetch-event-section
+                self.upcast::<EventTarget>().fire_simple_event("fetch");
                 let _ = mediator.response_chan.send(None);
             }
         }

tests/html/service-worker/dashboard_helper.js

@@ -0,0 +1,3 @@
+function status_from_dashboard() {
+	console.log("Dashboard Service worker is active");
+}

tests/html/service-worker/demo_iframe.html

@@ -2,7 +2,7 @@
 <html lang="en">
 <head>
 	<meta charset="UTF-8">
-	<title>An iframe</title>
+	<title>Servo Browser Engine</title>
 </head>
 <body>
 <div>

tests/html/service-worker/dummy.js

@@ -1 +0,0 @@
-console.log("dummy test file");

tests/html/service-worker/iframe_sw.js

@@ -1 +1,7 @@
-console.log("iframe service worker active");
+self.addEventListener('activate', function(e) {
+	console.log("iframe service worker active");
+});
+
+self.addEventListener('fetch', function(e) {
+	console.log("A fetch event detected by /iframe service worker");
+});

tests/html/service-worker/index.html

@@ -6,38 +6,46 @@
 </head>
 <body>
 <p>This page tests the registration and initialization of Service Workers in Servo.</p>
-<div id="registration">
-    <a href="/dashboard-page.html">Go to Dashboard</a>
-    <a href="/profile.html">Go to Profile</a>
+
+<div id="sw_demo">
     <iframe id="iframe_sw" width="" height="200"></iframe>
     <br>
-    <button onclick="register_zero()">Register for Root</button>
-    <button onclick="register_one()">Register for Dashboard</button>
-    <button onclick="register_two()">Register for Profile</button>
+    <a href="/dashboard-page.html">Go to Dashboard</a>
+    <a href="/profile.html">Go to Profile</a>
+    <br>
+    <button onclick="register_zero()">Register for Root (/)</button>
+    <button onclick="register_one()">Register for Dashboard (/dashboard)</button>
+    <button onclick="register_two()">Register for Profile (/profile)</button>
 </div>
+
     <script>
     var reg = navigator.serviceWorker.register('iframe_sw.js', { 'scope': '/demo_iframe.html' });
     console.log("From client worker registered: ", navigator.serviceWorker.controller);
-    console.log("Registered script source: ", navigator.serviceWorker.controller.scriptURL);
+    console.log("Registered script source: "+ navigator.serviceWorker.controller.scriptURL);
     document.getElementById('iframe_sw').src = 'demo_iframe.html';
 
     function register_zero() {
         var reg = navigator.serviceWorker.register('sw.js', { 'scope': './' });
         console.log("From client worker registered: ", navigator.serviceWorker.controller);
-        console.log("Registered script source: ", navigator.serviceWorker.controller.scriptURL);
+        console.log("Registered script source: "+ navigator.serviceWorker.controller.scriptURL);
     }
 
     function register_one() {
         var reg = navigator.serviceWorker.register('sw_dashboard.js', { 'scope': '/dashboard' });
         console.log("From client worker registered: ", navigator.serviceWorker.controller);
-        console.log("Registered script source: ", navigator.serviceWorker.controller.scriptURL);
+        console.log("Registered script source: "+ navigator.serviceWorker.controller.scriptURL);
     }
 
     function register_two() {
         var reg = navigator.serviceWorker.register('sw_profile.js', { 'scope': '/profile' });
         console.log("From client worker registered: ", navigator.serviceWorker.controller);
-        console.log("Registered script source: ", navigator.serviceWorker.controller.scriptURL);
+        console.log("Registered script source: "+ navigator.serviceWorker.controller.scriptURL);
     }
+
+    navigator.serviceWorker.addEventListener('controllerchange', function(e) {
+        console.log("active Service Worker changed");
+    });
+
     </script>
 </body>
 </html>

tests/html/service-worker/sw.js

@@ -1 +0,0 @@
-console.log("root service worker: active");

tests/html/service-worker/sw_dashboard.js

@@ -1,2 +1,9 @@
-importScripts('dummy.js');
-console.log("dashboard service worker: active");
+importScripts('dashboard_helper.js');
+
+self.addEventListener('activate', function(e) {
+	status_from_dashboard();
+});
+
+self.addEventListener('fetch', function(e) {
+	console.log("A fetch event detected by /dashboard service worker");
+});

tests/html/service-worker/sw_profile.js

@@ -1 +1,8 @@
-console.log("profile service worker: active");
+
+self.addEventListener('activate', function(e) {
+	console.log("profile service worker active");
+});
+
+self.addEventListener('fetch', function(e) {
+	console.log("A fetch event detected by /profile service worker");
+});