gecko-dev/dom/base/nsIGlobalObject.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "nsIGlobalObject.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/FunctionBinding.h"
#include "mozilla/dom/ServiceWorker.h"
#include "mozilla/dom/ServiceWorkerRegistration.h"
#include "nsContentUtils.h"
#include "nsThreadUtils.h"
#include "nsGlobalWindowInner.h"
using mozilla::AutoSlowOperation;
using mozilla::CycleCollectedJSContext;
using mozilla::DOMEventTargetHelper;
using mozilla::ErrorResult;
using mozilla::IgnoredErrorResult;
using mozilla::MallocSizeOf;
using mozilla::Maybe;
using mozilla::MicroTaskRunnable;
using mozilla::dom::BlobURLProtocolHandler;
using mozilla::dom::ClientInfo;
using mozilla::dom::ServiceWorker;
using mozilla::dom::ServiceWorkerDescriptor;
using mozilla::dom::ServiceWorkerRegistration;
using mozilla::dom::ServiceWorkerRegistrationDescriptor;
using mozilla::dom::VoidFunction;
nsIGlobalObject::~nsIGlobalObject() {
UnlinkHostObjectURIs();
DisconnectEventTargetObjects();
MOZ_DIAGNOSTIC_ASSERT(mEventTargetObjects.isEmpty());
}
nsIPrincipal* nsIGlobalObject::PrincipalOrNull() {
if (!NS_IsMainThread()) {
return nullptr;
}
JSObject* global = GetGlobalJSObjectPreserveColor();
if (NS_WARN_IF(!global)) return nullptr;
return nsContentUtils::ObjectPrincipal(global);
}
void nsIGlobalObject::RegisterHostObjectURI(const nsACString& aURI) {
MOZ_ASSERT(!mHostObjectURIs.Contains(aURI));
mHostObjectURIs.AppendElement(aURI);
}
void nsIGlobalObject::UnregisterHostObjectURI(const nsACString& aURI) {
mHostObjectURIs.RemoveElement(aURI);
}
namespace {
class UnlinkHostObjectURIsRunnable final : public mozilla::Runnable {
public:
explicit UnlinkHostObjectURIsRunnable(nsTArray<nsCString>& aURIs)
: mozilla::Runnable("UnlinkHostObjectURIsRunnable") {
mURIs.SwapElements(aURIs);
}
NS_IMETHOD Run() override {
MOZ_ASSERT(NS_IsMainThread());
for (uint32_t index = 0; index < mURIs.Length(); ++index) {
BlobURLProtocolHandler::RemoveDataEntry(mURIs[index]);
}
return NS_OK;
}
private:
~UnlinkHostObjectURIsRunnable() {}
nsTArray<nsCString> mURIs;
};
} // namespace
void nsIGlobalObject::UnlinkHostObjectURIs() {
if (mHostObjectURIs.IsEmpty()) {
return;
}
if (NS_IsMainThread()) {
for (uint32_t index = 0; index < mHostObjectURIs.Length(); ++index) {
BlobURLProtocolHandler::RemoveDataEntry(mHostObjectURIs[index]);
}
mHostObjectURIs.Clear();
return;
}
// BlobURLProtocolHandler is main-thread only.
Bug 1207245 - part 6 - rename nsRefPtr<T> to RefPtr<T>; r=ehsan; a=Tomcat The bulk of this commit was generated with a script, executed at the top level of a typical source code checkout. The only non-machine-generated part was modifying MFBT's moz.build to reflect the new naming. CLOSED TREE makes big refactorings like this a piece of cake. # The main substitution. find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \ xargs perl -p -i -e ' s/nsRefPtr\.h/RefPtr\.h/g; # handle includes s/nsRefPtr ?</RefPtr</g; # handle declarations and variables ' # Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h. perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h # Handle nsRefPtr.h itself, a couple places that define constructors # from nsRefPtr, and code generators specially. We do this here, rather # than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename # things like nsRefPtrHashtable. perl -p -i -e 's/nsRefPtr/RefPtr/g' \ mfbt/nsRefPtr.h \ xpcom/glue/nsCOMPtr.h \ xpcom/base/OwningNonNull.h \ ipc/ipdl/ipdl/lower.py \ ipc/ipdl/ipdl/builtin.py \ dom/bindings/Codegen.py \ python/lldbutils/lldbutils/utils.py # In our indiscriminate substitution above, we renamed # nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up. find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \ xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g' if [ -d .git ]; then git mv mfbt/nsRefPtr.h mfbt/RefPtr.h else hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h fi --HG-- rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
2015-10-18 08:24:48 +03:00
RefPtr<UnlinkHostObjectURIsRunnable> runnable =
new UnlinkHostObjectURIsRunnable(mHostObjectURIs);
MOZ_ASSERT(mHostObjectURIs.IsEmpty());
nsresult rv = NS_DispatchToMainThread(runnable);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to dispatch a runnable to the main-thread.");
}
}
void nsIGlobalObject::TraverseHostObjectURIs(
nsCycleCollectionTraversalCallback& aCb) {
if (mHostObjectURIs.IsEmpty()) {
return;
}
// Currently we only store BlobImpl objects off the the main-thread and they
// are not CCed.
if (!NS_IsMainThread()) {
return;
}
for (uint32_t index = 0; index < mHostObjectURIs.Length(); ++index) {
BlobURLProtocolHandler::Traverse(mHostObjectURIs[index], aCb);
}
}
void nsIGlobalObject::AddEventTargetObject(DOMEventTargetHelper* aObject) {
MOZ_DIAGNOSTIC_ASSERT(aObject);
MOZ_ASSERT(!aObject->isInList());
mEventTargetObjects.insertBack(aObject);
}
void nsIGlobalObject::RemoveEventTargetObject(DOMEventTargetHelper* aObject) {
MOZ_DIAGNOSTIC_ASSERT(aObject);
MOZ_ASSERT(aObject->isInList());
MOZ_ASSERT(aObject->GetOwnerGlobal() == this);
aObject->remove();
}
void nsIGlobalObject::ForEachEventTargetObject(
const std::function<void(DOMEventTargetHelper*, bool* aDoneOut)>& aFunc)
const {
// Protect against the function call triggering a mutation of the list
// while we are iterating by copying the DETH references to a temporary
// list.
AutoTArray<RefPtr<DOMEventTargetHelper>, 64> targetList;
for (const DOMEventTargetHelper* deth = mEventTargetObjects.getFirst(); deth;
deth = deth->getNext()) {
targetList.AppendElement(const_cast<DOMEventTargetHelper*>(deth));
}
// Iterate the target list and call the function on each one.
bool done = false;
for (auto target : targetList) {
// Check to see if a previous iteration's callback triggered the removal
// of this target as a side-effect. If it did, then just ignore it.
if (target->GetOwnerGlobal() != this) {
continue;
}
aFunc(target, &done);
if (done) {
break;
}
}
}
void nsIGlobalObject::DisconnectEventTargetObjects() {
ForEachEventTargetObject([&](DOMEventTargetHelper* aTarget, bool* aDoneOut) {
aTarget->DisconnectFromOwner();
// Calling DisconnectFromOwner() should result in
// RemoveEventTargetObject() being called.
MOZ_DIAGNOSTIC_ASSERT(aTarget->GetOwnerGlobal() != this);
});
}
Maybe<ClientInfo> nsIGlobalObject::GetClientInfo() const {
// By default globals do not expose themselves as a client. Only real
// window and worker globals are currently considered clients.
return Maybe<ClientInfo>();
}
Maybe<ServiceWorkerDescriptor> nsIGlobalObject::GetController() const {
// By default globals do not have a service worker controller. Only real
// window and worker globals can currently be controlled as a client.
return Maybe<ServiceWorkerDescriptor>();
}
RefPtr<ServiceWorker> nsIGlobalObject::GetOrCreateServiceWorker(
const ServiceWorkerDescriptor& aDescriptor) {
MOZ_DIAGNOSTIC_ASSERT(false,
"this global should not have any service workers");
return nullptr;
}
RefPtr<ServiceWorkerRegistration> nsIGlobalObject::GetServiceWorkerRegistration(
const mozilla::dom::ServiceWorkerRegistrationDescriptor& aDescriptor)
const {
MOZ_DIAGNOSTIC_ASSERT(false,
"this global should not have any service workers");
return nullptr;
}
RefPtr<ServiceWorkerRegistration>
nsIGlobalObject::GetOrCreateServiceWorkerRegistration(
const ServiceWorkerRegistrationDescriptor& aDescriptor) {
MOZ_DIAGNOSTIC_ASSERT(
false, "this global should not have any service worker registrations");
return nullptr;
}
nsPIDOMWindowInner* nsIGlobalObject::AsInnerWindow() {
if (MOZ_LIKELY(mIsInnerWindow)) {
return static_cast<nsPIDOMWindowInner*>(
static_cast<nsGlobalWindowInner*>(this));
}
return nullptr;
}
size_t nsIGlobalObject::ShallowSizeOfExcludingThis(MallocSizeOf aSizeOf) const {
size_t rtn = mHostObjectURIs.ShallowSizeOfExcludingThis(aSizeOf);
return rtn;
}
class QueuedMicrotask : public MicroTaskRunnable {
public:
QueuedMicrotask(nsIGlobalObject* aGlobal, VoidFunction& aCallback)
: mGlobal(aGlobal), mCallback(&aCallback) {}
MOZ_CAN_RUN_SCRIPT_BOUNDARY void Run(AutoSlowOperation& aAso) final {
IgnoredErrorResult rv;
MOZ_KnownLive(mCallback)->Call(static_cast<ErrorResult&>(rv));
}
bool Suppressed() final { return mGlobal->IsInSyncOperation(); }
private:
nsCOMPtr<nsIGlobalObject> mGlobal;
RefPtr<VoidFunction> mCallback;
};
void nsIGlobalObject::QueueMicrotask(VoidFunction& aCallback) {
CycleCollectedJSContext* context = CycleCollectedJSContext::Get();
if (context) {
RefPtr<MicroTaskRunnable> mt = new QueuedMicrotask(this, aCallback);
context->DispatchToMicroTask(mt.forget());
}
}