Kill resurrection (fixes #1204)

Author: jakearchibald

Diff for: docs/index.bs

@@ -210,8 +210,6 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-update-via-cache">update via cache mode</dfn>, which is "`imports`", "`all`", or "`none`". It is initially set to "`imports`".
 
-    A [=/service worker registration=] has an associated <dfn export id="dfn-uninstalling-flag">uninstalling flag</dfn>. It is initially unset.
-
     A [=/service worker registration=] has one or more <dfn export id="dfn-service-worker-registration-task-queue">task queues</dfn> that back up the <a>tasks</a> from its <a>active worker</a>'s <a>event loop</a>'s corresponding [=/task queues=]. (The target task sources for this back up operation are the <a>handle fetch task source</a> and the <a>handle functional event task source</a>.) The user agent dumps the <a>active worker</a>'s <a>tasks</a> to the [=/service worker registration=]'s [=service worker registration/task queues=] when the <a>active worker</a> is <a lt="terminate service worker">terminated</a> and <a lt="queue a task">re-queues those tasks</a> to the <a>active worker</a>'s <a>event loop</a>'s corresponding [=/task queues=] when the <a>active worker</a> spins off. Unlike the [=/task queues=] owned by <a>event loops</a>, the [=/service worker registration=]'s [=service worker registration/task queues=] are not processed by any <a>event loops</a> in and of itself.
 
     A [=/service worker registration=] has an associated <dfn export>{{NavigationPreloadManager}}</dfn> object.
@@ -220,6 +218,8 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A [=/service worker registration=] has an associated <dfn export>navigation preload header value</dfn>, which is a [=byte sequence=]. It is initially set to \`<code>true</code>\`.
 
+    A [=/service worker registration=] is said to be <dfn export id="dfn-service-worker-registration-uninstalled">unregistered</dfn> if [=scope to registration map=][[=service worker registration/scope url=]] is not this [=/service worker registration=].
+
     <section>
       <h4 id="service-worker-registration-lifetime">Lifetime</h4>
 
@@ -678,7 +678,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         1. Run the following steps [=in parallel=]:
             1. Let |registrations| be a new [=list=].
             1. [=map/For each=] |scope| → |registration| of [=scope to registration map=]:
-                1. If the [=url/origin=] of the result of [=URL parser|parsing=] |scope| is the [=same origin|same=] as |client|'s [=environment settings object/origin=], and |registration|'s [=uninstalling flag=] is unset, then [=append=] |registration| to |registrations|.
+                1. If the [=url/origin=] of the result of [=URL parser|parsing=] |scope| is the [=same origin|same=] as |client|'s [=environment settings object/origin=], then [=append=] |registration| to |registrations|.
             1. [=Queue a task=] on |promise|'s [=relevant settings object=]'s [=responsible event loop=], using the [=DOM manipulation task source=], to run the following steps:
                 1. Let |registrationObjects| be a new [=list=].
                 1. [=list/For each=] |registration| of |registrations|, [=append=] the {{ServiceWorkerRegistration}} object associated with |registration| to |registrationObjects|.
@@ -1297,6 +1297,9 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
                 1. If |client| is not a [=secure context=], [=continue=].
                 1. Let |registration| be the result of running <a>Match Service Worker Registration</a> algorithm passing |client|'s <a>creation URL</a> as the argument.
                 1. If |registration| is not the [=ServiceWorkerGlobalScope/service worker=]'s <a>containing service worker registration</a>, [=continue=].
+
+                    Note: |registration| will be null if the [=ServiceWorkerGlobalScope/service worker=]'s [=containing service worker registration=] is [=service worker registration/unregistered=].
+
                 1. If |client|'s <a>active service worker</a> is not the [=ServiceWorkerGlobalScope/service worker=], then:
                     1. Invoke <a>Handle Service Worker Client Unload</a> with |client| as the argument.
                     1. Set |client|'s <a>active service worker</a> to [=ServiceWorkerGlobalScope/service worker=].
@@ -1360,8 +1363,8 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
         1. Upon [=upon fulfillment|fulfillment=] or [=upon rejection|rejection=] of |promise|, [=queue a microtask=] to run these substeps:
             1. Decrement |event|'s [=ExtendableEvent/pending promises count=] by one.
             1. If |event|'s [=ExtendableEvent/pending promises count=] is 0, then:
-                1. Let |registration| be the [=context object=]'s [=relevant global object=]'s associated [=ServiceWorkerGlobalScope/service worker=]'s [=containing service worker registration=].
-                1. If |registration|'s [=uninstalling flag=] is set, invoke [=Try Clear Registration=] with |registration|.
+                1. Let |registration| be the [=current global object=]'s associated [=ServiceWorkerGlobalScope/service worker=]'s [=containing service worker registration=].
+                1. If |registration| is [=service worker registration/unregistered=], invoke [=Try Clear Registration=] with |registration|.
                 1. If |registration| is not null, invoke [=Try Activate=] with |registration|.
 
       The user agent *should not* [=terminate service worker|terminate=] a [=/service worker=] if [=Service Worker Has No Pending Events=] returns false for that [=/service worker=].
@@ -2434,7 +2437,6 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
           1. Invoke <a>Finish Job</a> with |job| and abort these steps.
       1. Let |registration| be the result of running the <a>Get Registration</a> algorithm passing |job|'s [=job/scope url=] as the argument.
       1. If |registration| is not null, then:
-          1. If |registration|'s <a>uninstalling flag</a> is set, unset it.
           1. Let |newestWorker| be the result of running the <a>Get Newest Worker</a> algorithm passing |registration| as the argument.
           1. If |newestWorker| is not null, |job|'s [=job/script url=] [=url/equals=] |newestWorker|'s [=service worker/script url=], and |job|'s [=job/update via cache mode=]'s value equals |registration|'s [=service worker registration/update via cache mode=], then:
               1. Invoke [=Resolve Job Promise=] with |job| and |registration|.
@@ -2453,7 +2455,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       :: none
 
       1. Let |registration| be the result of running the <a>Get Registration</a> algorithm passing |job|'s [=job/scope url=] as the argument.
-      1. If |registration| is null or |registration|'s <a>uninstalling flag</a> is set, then:
+      1. If |registration| is null or |registration| is [=service worker registration/unregistered=], then:
           1. Invoke [=Reject Job Promise=] with |job| and `TypeError`.
           1. Invoke <a>Finish Job</a> with |job| and abort these steps.
       1. Let |newestWorker| be the result of running <a>Get Newest Worker</a> algorithm passing |registration| as the argument.
@@ -2604,7 +2606,10 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. Run the <a>Update Worker State</a> algorithm passing |registration|'s <a>installing worker</a> and *installing* as the arguments.
       1. Assert: |job|'s [=job/job promise=] is not null.
       1. Invoke [=Resolve Job Promise=] with |job| and |registration|.
-      1. <a>Queue a task</a> to <a>fire an event</a> named <code>updatefound</code> at all the {{ServiceWorkerRegistration}} objects for all the [=/service worker clients=] whose <a>creation URL</a> <a lt="Match Service Worker Registration">matches</a> |registration|'s [=service worker registration/scope url=] and all the [=/service workers=] whose <a>containing service worker registration</a> is |registration|.
+      1. Let |settingsObjects| be all [=environment settings objects=] whose [=environment settings object/origin=] is |registration|'s [=service worker registration/scope url=]'s origin.
+      1. For each |settingsObject| of |settingsObjects|, [=queue a task=] on |settingsObject| to run the following steps:
+          1. Let |registrationObjects| be every {{ServiceWorkerRegistration}} object in |settingsObject|'s [=environment settings object/realm execution context=], whose [=ServiceWorkerRegistration/service worker registration=] is |registration|.
+          1. For each |registrationObject| of |registrationObjects|, [=fire an event=] on |registrationObject| named `updatefound`.
       1. Let |installingWorker| be |registration|'s <a>installing worker</a>.
       1. Invoke <a>Run Service Worker</a> algorithm given |installingWorker|, and with the *force bypass cache for importscripts flag* set if |job|'s [=job/force bypass cache flag=] is set.
       1. <a>Queue a task</a> |task| to run the following substeps:
@@ -2900,7 +2905,6 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       : Output
       :: None
 
-      1. Assert: [=scope to registration map=] contains a value equal to |registration|.
       1. Assert: |registration|'s [=active worker=] is not null.
       1. Let |activeWorker| be |registration|'s [=active worker=].
       1. If |activeWorker|'s [=set of event types to handle=] does not [=set/contain=] |eventName|, then return and run the following steps [=in parallel=]:
@@ -2956,8 +2960,8 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. Let |registration| be the [=/service worker registration=] <a>used</a> by |client|.
       1. If |registration| is null, abort these steps.
       1. If any other [=/service worker client=] is <a>using</a> |registration|, abort these steps.
-      1. If |registration|'s [=uninstalling flag=] is set, invoke [=Try Clear Registration=] with |registration|.
-      1. If |registration| is not null, invoke [=Try Activate=] with |registration|.
+      1. If |registration| is [=service worker registration/unregistered=], invoke [=Try Clear Registration=] with |registration|.
+      1. Invoke [=Try Activate=] with |registration|.
   </section>
 
   <section algorithm>
@@ -3006,7 +3010,7 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       1. If |registration| is null, then:
           1. Invoke <a>Resolve Job Promise</a> with |job| and false.
           1. Invoke <a>Finish Job</a> with |job| and abort these steps.
-      1. Set |registration|'s <a>uninstalling flag</a>.
+      1. [=map/Remove=] [=scope to registration map=][|job|'s [=job/scope url=]].
       1. Invoke <a>Resolve Job Promise</a> with |job| and true.
       1. Invoke [=Try Clear Registration=] with |registration|.
 
@@ -3052,8 +3056,6 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
           1. [=Terminate Service Worker|Terminate=] |registration|'s [=active worker=].
           1. Run the <a>Update Worker State</a> algorithm passing |registration|'s [=active worker=] and *redundant* as the arguments.
           1. Run the <a>Update Registration State</a> algorithm passing |registration|, "<code>active</code>" and null as the arguments.
-      1. Let |scopeString| be |registration|'s [=URL serializer|serialized=] [=service worker registration/scope url=].
-      1. [=map/Remove=] <a>scope to registration map</a>[|scopeString|].
   </section>
 
   <section algorithm>
@@ -3176,7 +3178,6 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
           1. Set |matchingScope| to the result of <a lt="URL parser">parsing</a> |matchingScopeString|.
           1. Assert: |matchingScope|'s [=url/origin=] and |clientURL|'s [=url/origin=] are [=same origin=].
       1. Let |registration| be the result of running <a>Get Registration</a> algorithm passing |matchingScope| as the argument.
-      1. If |registration| is not null and |registration|'s <a>uninstalling flag</a> is set, return null.
       1. Return |registration|.
   </section>
 
@@ -3186,15 +3187,14 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
       : Input
       :: |scope|, a [=/URL=]
       : Output
-      :: |registration|, a [=/service worker registration=]
+      :: A [=/service worker registration=]
 
       1. Run the following steps atomically.
       1. Let |scopeString| be the empty string.
       1. If |scope| is not null, set |scopeString| to [=URL serializer|serialized=] |scope| with the *exclude fragment flag* set.
-      1. Let |registration| be null.
       1. [=map/For each=] |key| → |value| of <a>scope to registration map</a>:
-          1. If |scopeString| matches |key|, set |registration| to |value|.
-      1. Return |registration|.
+          1. If |scopeString| matches |key|, then return |value|.
+      1. Return null.
   </section>
 
   <section algorithm>