ServiceWorker: add ServiceWorkerClients.claim() support (2/3).

content/browser/service_worker/service_worker_registration.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/service_worker_registration.h"
 
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_info.h"
 #include "content/browser/service_worker/service_worker_register_job.h"
 #include "content/browser/service_worker/service_worker_utils.h"
@@ skipping 143 matching lines @@
 }
 
 void ServiceWorkerRegistration::ActivateWaitingVersionWhenReady() {
   DCHECK(waiting_version());
   should_activate_when_ready_ = true;
   if (!active_version() || !active_version()->HasControllee() ||
       waiting_version()->skip_waiting())
     ActivateWaitingVersion();
 }
 
+void ServiceWorkerRegistration::ClaimClients(const StatusCallback& callback) {
+  DCHECK(context_);
+  DCHECK(active_version());
+  // Check all stored and initially installing registrations of this origin is
+  // enough for claiming documents.

[falken, 2015/01/30 10:24:02]

I'd change this comment to a TODO to not have to hit DB and link to a bug.

[xiang, 2015/02/02 04:24:58]

Done.

+  context_->storage()->GetRegistrationsForOrigin(
+      pattern_.GetOrigin(),
+      base::Bind(&ServiceWorkerRegistration::DidGetRegistrationsForClaimClients,
+                 this, callback, active_version_));
+}
+
 void ServiceWorkerRegistration::ClearWhenReady() {
   DCHECK(context_);
   if (is_uninstalling_)
     return;
   is_uninstalling_ = true;
 
   context_->storage()->NotifyUninstallingRegistration(this);
   context_->storage()->DeleteRegistration(
       id(),
       pattern().GetOrigin(),
@@ skipping 179 matching lines @@
     ServiceWorkerStatusCode status) {
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
     return;
   }
   context_->storage()->NotifyDoneInstallingRegistration(
       this, version.get(), status);
   callback.Run(status);
 }
 
+void ServiceWorkerRegistration::DidGetRegistrationsForClaimClients(
+    const StatusCallback& callback,
+    scoped_refptr<ServiceWorkerVersion> version,
+    const std::vector<ServiceWorkerRegistrationInfo>& registrations) {
+  if (!context_) {
+    callback.Run(SERVICE_WORKER_ERROR_ABORT);
+    return;
+  }
+  if (!active_version() || version != active_version()) {
+    callback.Run(SERVICE_WORKER_ERROR_STATE);
+    return;
+  }
+
+  for (scoped_ptr<ServiceWorkerContextCore::ProviderHostIterator> it =
+           context_->GetProviderHostIterator();
+       !it->IsAtEnd(); it->Advance()) {
+    ServiceWorkerProviderHost* host = it->GetProviderHost();
+    if (ShouldClaim(host, registrations))
+      host->ClaimedByRegistration(this);
+  }
+  callback.Run(SERVICE_WORKER_OK);
+}
+
+bool ServiceWorkerRegistration::ShouldClaim(
+    ServiceWorkerProviderHost* provider_host,
+    const std::vector<ServiceWorkerRegistrationInfo>& registrations) {
+  if (provider_host->controlling_version() == active_version())
+    return false;
+
+  LongestScopeMatcher matcher(provider_host->document_url());
+  if (!matcher.MatchLongest(pattern_))
+    return false;
+  for (const ServiceWorkerRegistrationInfo& info : registrations) {
+    ServiceWorkerRegistration* registration =
+        context_->GetLiveRegistration(info.registration_id);
+    if (registration && registration->is_uninstalled())

[xiang, 2015/01/30 07:18:57]

Only live registrations maybe uninstalled during GetRegistrationsForOrigin().

+      continue;
+    if (matcher.MatchLongest(info.pattern))

[michaeln, 2015/01/30 23:43:07]

given a docurl and a matchingscope, this function is relying on the matcher
return false for a 2nd call with the same matching inpu.

LongestScopeMatcher matcher(docurl);
ASSERT_TRUE(matcher->MatchLongest(matchingscope));
ASSERT_FALSE(matcher->MatchLongest(matchingscope));

Can you add a test like that to service_worker_utils_unittest.cc

[xiang, 2015/02/02 04:24:58]

Done.

+      return false;
+  }
+  return true;
+}
+
 }  // namespace content