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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "ServiceWorkerInfo.h"
#include "ServiceWorker.h"
#include "ServiceWorkerPrivate.h"
#include "ServiceWorkerScriptCache.h"
BEGIN_WORKERS_NAMESPACE
static_assert(nsIServiceWorkerInfo::STATE_INSTALLING == static_cast<uint16_t>(ServiceWorkerState::Installing),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
static_assert(nsIServiceWorkerInfo::STATE_INSTALLED == static_cast<uint16_t>(ServiceWorkerState::Installed),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
static_assert(nsIServiceWorkerInfo::STATE_ACTIVATING == static_cast<uint16_t>(ServiceWorkerState::Activating),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
static_assert(nsIServiceWorkerInfo::STATE_ACTIVATED == static_cast<uint16_t>(ServiceWorkerState::Activated),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
static_assert(nsIServiceWorkerInfo::STATE_REDUNDANT == static_cast<uint16_t>(ServiceWorkerState::Redundant),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
static_assert(nsIServiceWorkerInfo::STATE_UNKNOWN == static_cast<uint16_t>(ServiceWorkerState::EndGuard_),
"ServiceWorkerState enumeration value should match state values from nsIServiceWorkerInfo.");
NS_IMPL_ISUPPORTS(ServiceWorkerInfo, nsIServiceWorkerInfo)
NS_IMETHODIMP
ServiceWorkerInfo::GetScriptSpec(nsAString& aScriptSpec)
{
AssertIsOnMainThread();
CopyUTF8toUTF16(mScriptSpec, aScriptSpec);
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerInfo::GetCacheName(nsAString& aCacheName)
{
AssertIsOnMainThread();
aCacheName = mCacheName;
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerInfo::GetState(uint16_t* aState)
{
MOZ_ASSERT(aState);
AssertIsOnMainThread();
*aState = static_cast<uint16_t>(mState);
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerInfo::GetDebugger(nsIWorkerDebugger** aResult)
{
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_FAILURE;
}
return mServiceWorkerPrivate->GetDebugger(aResult);
}
NS_IMETHODIMP
ServiceWorkerInfo::AttachDebugger()
{
return mServiceWorkerPrivate->AttachDebugger();
}
NS_IMETHODIMP
ServiceWorkerInfo::DetachDebugger()
{
return mServiceWorkerPrivate->DetachDebugger();
}
void
ServiceWorkerInfo::AppendWorker(ServiceWorker* aWorker)
{
MOZ_ASSERT(aWorker);
#ifdef DEBUG
nsAutoString workerURL;
aWorker->GetScriptURL(workerURL);
MOZ_ASSERT(workerURL.Equals(NS_ConvertUTF8toUTF16(mScriptSpec)));
#endif
MOZ_ASSERT(!mInstances.Contains(aWorker));
mInstances.AppendElement(aWorker);
aWorker->SetState(State());
}
void
ServiceWorkerInfo::RemoveWorker(ServiceWorker* aWorker)
{
MOZ_ASSERT(aWorker);
#ifdef DEBUG
nsAutoString workerURL;
aWorker->GetScriptURL(workerURL);
MOZ_ASSERT(workerURL.Equals(NS_ConvertUTF8toUTF16(mScriptSpec)));
#endif
MOZ_ASSERT(mInstances.Contains(aWorker));
mInstances.RemoveElement(aWorker);
}
namespace {
class ChangeStateUpdater final : public Runnable
{
public:
ChangeStateUpdater(const nsTArray<ServiceWorker*>& aInstances,
ServiceWorkerState aState)
: mState(aState)
{
for (size_t i = 0; i < aInstances.Length(); ++i) {
mInstances.AppendElement(aInstances[i]);
}
}
NS_IMETHOD Run() override
{
// We need to update the state of all instances atomically before notifying
// them to make sure that the observed state for all instances inside
// statechange event handlers is correct.
for (size_t i = 0; i < mInstances.Length(); ++i) {
mInstances[i]->SetState(mState);
}
for (size_t i = 0; i < mInstances.Length(); ++i) {
mInstances[i]->DispatchStateChange(mState);
}
return NS_OK;
}
private:
AutoTArray<RefPtr<ServiceWorker>, 1> mInstances;
ServiceWorkerState mState;
};
}
void
ServiceWorkerInfo::UpdateState(ServiceWorkerState aState)
{
AssertIsOnMainThread();
#ifdef DEBUG
// Any state can directly transition to redundant, but everything else is
// ordered.
if (aState != ServiceWorkerState::Redundant) {
MOZ_ASSERT_IF(mState == ServiceWorkerState::EndGuard_, aState == ServiceWorkerState::Installing);
MOZ_ASSERT_IF(mState == ServiceWorkerState::Installing, aState == ServiceWorkerState::Installed);
MOZ_ASSERT_IF(mState == ServiceWorkerState::Installed, aState == ServiceWorkerState::Activating);
MOZ_ASSERT_IF(mState == ServiceWorkerState::Activating, aState == ServiceWorkerState::Activated);
}
// Activated can only go to redundant.
MOZ_ASSERT_IF(mState == ServiceWorkerState::Activated, aState == ServiceWorkerState::Redundant);
#endif
// Flush any pending functional events to the worker when it transitions to the
// activated state.
// TODO: Do we care that these events will race with the propagation of the
// state change?
if (aState == ServiceWorkerState::Activated && mState != aState) {
mServiceWorkerPrivate->Activated();
}
mState = aState;
nsCOMPtr<nsIRunnable> r = new ChangeStateUpdater(mInstances, mState);
MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(r.forget()));
if (mState == ServiceWorkerState::Redundant) {
serviceWorkerScriptCache::PurgeCache(mPrincipal, mCacheName);
}
}
ServiceWorkerInfo::ServiceWorkerInfo(nsIPrincipal* aPrincipal,
const nsACString& aScope,
const nsACString& aScriptSpec,
const nsAString& aCacheName)
: mPrincipal(aPrincipal)
, mScope(aScope)
, mScriptSpec(aScriptSpec)
, mCacheName(aCacheName)
, mState(ServiceWorkerState::EndGuard_)
, mServiceWorkerID(GetNextID())
, mServiceWorkerPrivate(new ServiceWorkerPrivate(this))
, mSkipWaitingFlag(false)
{
MOZ_ASSERT(mPrincipal);
// cache origin attributes so we can use them off main thread
mOriginAttributes = BasePrincipal::Cast(mPrincipal)->OriginAttributesRef();
MOZ_ASSERT(!mScope.IsEmpty());
MOZ_ASSERT(!mScriptSpec.IsEmpty());
MOZ_ASSERT(!mCacheName.IsEmpty());
}
ServiceWorkerInfo::~ServiceWorkerInfo()
{
MOZ_ASSERT(mServiceWorkerPrivate);
mServiceWorkerPrivate->NoteDeadServiceWorkerInfo();
}
static uint64_t gServiceWorkerInfoCurrentID = 0;
uint64_t
ServiceWorkerInfo::GetNextID() const
{
return ++gServiceWorkerInfoCurrentID;
}
already_AddRefed<ServiceWorker>
ServiceWorkerInfo::GetOrCreateInstance(nsPIDOMWindowInner* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWindow);
RefPtr<ServiceWorker> ref;
for (uint32_t i = 0; i < mInstances.Length(); ++i) {
MOZ_ASSERT(mInstances[i]);
if (mInstances[i]->GetOwner() == aWindow) {
ref = mInstances[i];
break;
}
}
if (!ref) {
ref = new ServiceWorker(aWindow, this);
}
return ref.forget();
}
END_WORKERS_NAMESPACE
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