gecko-dev/dom/base/nsIGlobalObject.cpp

222 строки
5.8 KiB
C++
Исходник Обычный вид История

/* -*- 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/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/ServiceWorker.h"
#include "mozilla/dom/ServiceWorkerRegistration.h"
#include "nsContentUtils.h"
#include "nsThreadUtils.h"
using mozilla::MallocSizeOf;
using mozilla::Maybe;
using mozilla::DOMEventTargetHelper;
using mozilla::dom::ClientInfo;
using mozilla::dom::ServiceWorker;
using mozilla::dom::ServiceWorkerDescriptor;
using mozilla::dom::ServiceWorkerRegistration;
using mozilla::dom::ServiceWorkerRegistrationDescriptor;
nsIGlobalObject::~nsIGlobalObject()
{
UnlinkHostObjectURIs();
DisconnectEventTargetObjects();
MOZ_DIAGNOSTIC_ASSERT(mEventTargetObjects.isEmpty());
}
nsIPrincipal*
nsIGlobalObject::PrincipalOrNull()
{
JSObject *global = GetGlobalJSObject();
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::GetOrCreateServiceWorkerRegistration(const ServiceWorkerRegistrationDescriptor& aDescriptor)
{
MOZ_DIAGNOSTIC_ASSERT(false, "this global should not have any service worker registrations");
return nullptr;
}
size_t
nsIGlobalObject::ShallowSizeOfExcludingThis(MallocSizeOf aSizeOf) const
{
size_t rtn = mHostObjectURIs.ShallowSizeOfExcludingThis(aSizeOf);
return rtn;
}