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/* -*- Mode: C++; tab-width: 2; 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 "nsXULPrototypeDocument.h"
#include "XULDocument.h"
#include "nsAString.h"
#include "nsIObjectInputStream.h"
#include "nsIObjectOutputStream.h"
#include "nsIPrincipal.h"
#include "nsJSPrincipals.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIScriptRuntime.h"
#include "nsIServiceManager.h"
#include "nsIArray.h"
#include "nsIURI.h"
#include "jsapi.h"
#include "nsString.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIDOMScriptObjectFactory.h"
#include "nsDOMCID.h"
#include "nsNodeInfoManager.h"
#include "nsContentUtils.h"
#include "nsCxPusher.h"
#include "nsCCUncollectableMarker.h"
#include "nsDOMJSUtils.h" // for GetScriptContextFromJSContext
#include "xpcpublic.h"
#include "mozilla/dom/BindingUtils.h"
using mozilla::dom::DestroyProtoAndIfaceCache;
using mozilla::AutoPushJSContext;
using mozilla::dom::XULDocument;
static NS_DEFINE_CID(kDOMScriptObjectFactoryCID,
NS_DOM_SCRIPT_OBJECT_FACTORY_CID);
class nsXULPDGlobalObject : public nsIScriptGlobalObject
{
public:
nsXULPDGlobalObject(nsXULPrototypeDocument* owner);
// nsISupports interface
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
// nsIGlobalJSObjectHolder methods
virtual JSObject* GetGlobalJSObject();
// nsIScriptGlobalObject methods
virtual void OnFinalize(JSObject* aObject);
virtual void SetScriptsEnabled(bool aEnabled, bool aFireTimeouts);
virtual nsresult EnsureScriptEnvironment();
virtual nsIScriptContext *GetScriptContext();
// nsIScriptObjectPrincipal methods
virtual nsIPrincipal* GetPrincipal();
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXULPDGlobalObject,
nsIScriptGlobalObject)
void ClearGlobalObjectOwner();
protected:
virtual ~nsXULPDGlobalObject();
nsXULPrototypeDocument* mGlobalObjectOwner; // weak reference
nsCOMPtr<nsIScriptContext> mContext;
JSObject* mJSObject;
nsCOMPtr<nsIPrincipal> mCachedPrincipal;
static JSClass gSharedGlobalClass;
};
nsIPrincipal* nsXULPrototypeDocument::gSystemPrincipal;
nsXULPDGlobalObject* nsXULPrototypeDocument::gSystemGlobal;
uint32_t nsXULPrototypeDocument::gRefCnt;
void
nsXULPDGlobalObject_finalize(JSFreeOp *fop, JSObject *obj)
{
nsISupports *nativeThis = (nsISupports*)JS_GetPrivate(obj);
nsCOMPtr<nsIScriptGlobalObject> sgo(do_QueryInterface(nativeThis));
if (sgo) {
sgo->OnFinalize(obj);
}
// The addref was part of JSObject construction
NS_RELEASE(nativeThis);
}
JSBool
nsXULPDGlobalObject_resolve(JSContext *cx, JS::Handle<JSObject*> obj, JS::Handle<jsid> id)
{
JSBool did_resolve = JS_FALSE;
return JS_ResolveStandardClass(cx, obj, id, &did_resolve);
}
JSClass nsXULPDGlobalObject::gSharedGlobalClass = {
"nsXULPrototypeScript compilation scope",
JSCLASS_HAS_PRIVATE | JSCLASS_PRIVATE_IS_NSISUPPORTS |
JSCLASS_IMPLEMENTS_BARRIERS | JSCLASS_GLOBAL_FLAGS_WITH_SLOTS(0),
JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, nsXULPDGlobalObject_resolve, JS_ConvertStub,
nsXULPDGlobalObject_finalize, nullptr, nullptr, nullptr, nullptr,
nullptr
};
//----------------------------------------------------------------------
//
// ctors, dtors, n' stuff
//
nsXULPrototypeDocument::nsXULPrototypeDocument()
: mRoot(nullptr),
mLoaded(false),
mCCGeneration(0),
mGCNumber(0)
{
++gRefCnt;
}
nsresult
nsXULPrototypeDocument::Init()
{
mNodeInfoManager = new nsNodeInfoManager();
NS_ENSURE_TRUE(mNodeInfoManager, NS_ERROR_OUT_OF_MEMORY);
return mNodeInfoManager->Init(nullptr);
}
nsXULPrototypeDocument::~nsXULPrototypeDocument()
{
if (mGlobalObject) {
// cleaup cycles etc.
mGlobalObject->ClearGlobalObjectOwner();
}
if (mRoot)
mRoot->ReleaseSubtree();
if (--gRefCnt == 0) {
NS_IF_RELEASE(gSystemPrincipal);
NS_IF_RELEASE(gSystemGlobal);
}
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsXULPrototypeDocument)
tmp->mPrototypeWaiters.Clear();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsXULPrototypeDocument)
if (nsCCUncollectableMarker::InGeneration(cb, tmp->mCCGeneration)) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRoot)
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mGlobalObject");
cb.NoteXPCOMChild(static_cast<nsIScriptGlobalObject*>(tmp->mGlobalObject));
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNodeInfoManager)
for (uint32_t i = 0; i < tmp->mPrototypeWaiters.Length(); ++i) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mPrototypeWaiters[i]");
cb.NoteXPCOMChild(static_cast<nsINode*>(tmp->mPrototypeWaiters[i].get()));
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXULPrototypeDocument)
NS_INTERFACE_MAP_ENTRY(nsIScriptGlobalObjectOwner)
NS_INTERFACE_MAP_ENTRY(nsISerializable)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIScriptGlobalObjectOwner)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXULPrototypeDocument)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXULPrototypeDocument)
NS_IMETHODIMP
NS_NewXULPrototypeDocument(nsXULPrototypeDocument** aResult)
{
*aResult = new nsXULPrototypeDocument();
if (! *aResult)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv;
rv = (*aResult)->Init();
if (NS_FAILED(rv)) {
delete *aResult;
*aResult = nullptr;
return rv;
}
NS_ADDREF(*aResult);
return rv;
}
// Helper method that shares a system global among all prototype documents
// that have the system principal as their security principal. Called by
// nsXULPrototypeDocument::Read and
// nsXULPrototypeDocument::GetScriptGlobalObject.
// This method greatly reduces the number of nsXULPDGlobalObjects and their
// nsIScriptContexts in apps that load many XUL documents via chrome: URLs.
nsXULPDGlobalObject *
nsXULPrototypeDocument::NewXULPDGlobalObject()
{
// Now compare DocumentPrincipal() to gSystemPrincipal, in order to create
// gSystemGlobal if the two pointers are equal. Thus, gSystemGlobal
// implies gSystemPrincipal.
nsXULPDGlobalObject *global;
if (DocumentPrincipal() == gSystemPrincipal) {
if (!gSystemGlobal) {
gSystemGlobal = new nsXULPDGlobalObject(nullptr);
if (! gSystemGlobal)
return nullptr;
NS_ADDREF(gSystemGlobal);
}
global = gSystemGlobal;
} else {
global = new nsXULPDGlobalObject(this); // does not refcount
if (! global)
return nullptr;
}
return global;
}
//----------------------------------------------------------------------
//
// nsISerializable methods
//
NS_IMETHODIMP
nsXULPrototypeDocument::Read(nsIObjectInputStream* aStream)
{
nsresult rv;
rv = aStream->ReadObject(true, getter_AddRefs(mURI));
uint32_t count, i;
nsCOMPtr<nsIURI> styleOverlayURI;
nsresult tmp = aStream->Read32(&count);
if (NS_FAILED(tmp)) {
return tmp;
}
if (NS_FAILED(rv)) {
return rv;
}
for (i = 0; i < count; ++i) {
tmp = aStream->ReadObject(true, getter_AddRefs(styleOverlayURI));
if (NS_FAILED(tmp)) {
rv = tmp;
}
mStyleSheetReferences.AppendObject(styleOverlayURI);
}
// nsIPrincipal mNodeInfoManager->mPrincipal
nsCOMPtr<nsIPrincipal> principal;
tmp = aStream->ReadObject(true, getter_AddRefs(principal));
if (NS_FAILED(tmp)) {
rv = tmp;
}
// Better safe than sorry....
mNodeInfoManager->SetDocumentPrincipal(principal);
// nsIScriptGlobalObject mGlobalObject
mGlobalObject = NewXULPDGlobalObject();
if (! mGlobalObject)
return NS_ERROR_OUT_OF_MEMORY;
mRoot = new nsXULPrototypeElement();
if (! mRoot)
return NS_ERROR_OUT_OF_MEMORY;
// nsINodeInfo table
nsCOMArray<nsINodeInfo> nodeInfos;
tmp = aStream->Read32(&count);
if (NS_FAILED(tmp)) {
rv = tmp;
}
nsAutoString namespaceURI, prefixStr, localName;
bool prefixIsNull;
nsCOMPtr<nsIAtom> prefix;
for (i = 0; i < count; ++i) {
tmp = aStream->ReadString(namespaceURI);
if (NS_FAILED(tmp)) {
rv = tmp;
}
tmp = aStream->ReadBoolean(&prefixIsNull);
if (NS_FAILED(tmp)) {
rv = tmp;
}
if (prefixIsNull) {
prefix = nullptr;
} else {
tmp = aStream->ReadString(prefixStr);
if (NS_FAILED(tmp)) {
rv = tmp;
}
prefix = do_GetAtom(prefixStr);
}
tmp = aStream->ReadString(localName);
if (NS_FAILED(tmp)) {
rv = tmp;
}
nsCOMPtr<nsINodeInfo> nodeInfo;
// Using UINT16_MAX here as we don't know which nodeinfos will be
// used for attributes and which for elements. And that doesn't really
// matter.
tmp = mNodeInfoManager->GetNodeInfo(localName, prefix, namespaceURI,
UINT16_MAX,
getter_AddRefs(nodeInfo));
if (NS_FAILED(tmp)) {
rv = tmp;
}
if (!nodeInfos.AppendObject(nodeInfo))
rv = NS_ERROR_OUT_OF_MEMORY;
}
// Document contents
uint32_t type;
while (NS_SUCCEEDED(rv)) {
tmp = aStream->Read32(&type);
if (NS_FAILED(tmp)) {
rv = tmp;
}
if ((nsXULPrototypeNode::Type)type == nsXULPrototypeNode::eType_PI) {
nsRefPtr<nsXULPrototypePI> pi = new nsXULPrototypePI();
if (! pi) {
rv = NS_ERROR_OUT_OF_MEMORY;
break;
}
tmp = pi->Deserialize(aStream, mGlobalObject, mURI, &nodeInfos);
if (NS_FAILED(tmp)) {
rv = tmp;
}
tmp = AddProcessingInstruction(pi);
if (NS_FAILED(tmp)) {
rv = tmp;
}
} else if ((nsXULPrototypeNode::Type)type == nsXULPrototypeNode::eType_Element) {
tmp = mRoot->Deserialize(aStream, mGlobalObject, mURI, &nodeInfos);
if (NS_FAILED(tmp)) {
rv = tmp;
}
break;
} else {
NS_NOTREACHED("Unexpected prototype node type");
rv = NS_ERROR_FAILURE;
break;
}
}
tmp = NotifyLoadDone();
if (NS_FAILED(tmp)) {
rv = tmp;
}
return rv;
}
static nsresult
GetNodeInfos(nsXULPrototypeElement* aPrototype,
nsCOMArray<nsINodeInfo>& aArray)
{
nsresult rv;
if (aArray.IndexOf(aPrototype->mNodeInfo) < 0) {
if (!aArray.AppendObject(aPrototype->mNodeInfo)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
// Search attributes
uint32_t i;
for (i = 0; i < aPrototype->mNumAttributes; ++i) {
nsCOMPtr<nsINodeInfo> ni;
nsAttrName* name = &aPrototype->mAttributes[i].mName;
if (name->IsAtom()) {
ni = aPrototype->mNodeInfo->NodeInfoManager()->
GetNodeInfo(name->Atom(), nullptr, kNameSpaceID_None,
nsIDOMNode::ATTRIBUTE_NODE);
}
else {
ni = name->NodeInfo();
}
if (aArray.IndexOf(ni) < 0) {
if (!aArray.AppendObject(ni)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
// Search children
for (i = 0; i < aPrototype->mChildren.Length(); ++i) {
nsXULPrototypeNode* child = aPrototype->mChildren[i];
if (child->mType == nsXULPrototypeNode::eType_Element) {
rv = GetNodeInfos(static_cast<nsXULPrototypeElement*>(child),
aArray);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXULPrototypeDocument::Write(nsIObjectOutputStream* aStream)
{
nsresult rv;
rv = aStream->WriteCompoundObject(mURI, NS_GET_IID(nsIURI), true);
uint32_t count;
count = mStyleSheetReferences.Count();
nsresult tmp = aStream->Write32(count);
if (NS_FAILED(tmp)) {
rv = tmp;
}
uint32_t i;
for (i = 0; i < count; ++i) {
tmp = aStream->WriteCompoundObject(mStyleSheetReferences[i],
NS_GET_IID(nsIURI), true);
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
// nsIPrincipal mNodeInfoManager->mPrincipal
tmp = aStream->WriteObject(mNodeInfoManager->DocumentPrincipal(),
true);
if (NS_FAILED(tmp)) {
rv = tmp;
}
#ifdef DEBUG
// XXX Worrisome if we're caching things without system principal.
if (!nsContentUtils::IsSystemPrincipal(mNodeInfoManager->DocumentPrincipal())) {
NS_WARNING("Serializing document without system principal");
}
#endif
// nsINodeInfo table
nsCOMArray<nsINodeInfo> nodeInfos;
if (mRoot) {
tmp = GetNodeInfos(mRoot, nodeInfos);
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
uint32_t nodeInfoCount = nodeInfos.Count();
tmp = aStream->Write32(nodeInfoCount);
if (NS_FAILED(tmp)) {
rv = tmp;
}
for (i = 0; i < nodeInfoCount; ++i) {
nsINodeInfo *nodeInfo = nodeInfos[i];
NS_ENSURE_TRUE(nodeInfo, NS_ERROR_FAILURE);
nsAutoString namespaceURI;
nodeInfo->GetNamespaceURI(namespaceURI);
tmp = aStream->WriteWStringZ(namespaceURI.get());
if (NS_FAILED(tmp)) {
rv = tmp;
}
nsAutoString prefix;
nodeInfo->GetPrefix(prefix);
bool nullPrefix = DOMStringIsNull(prefix);
tmp = aStream->WriteBoolean(nullPrefix);
if (NS_FAILED(tmp)) {
rv = tmp;
}
if (!nullPrefix) {
tmp = aStream->WriteWStringZ(prefix.get());
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
nsAutoString localName;
nodeInfo->GetName(localName);
tmp = aStream->WriteWStringZ(localName.get());
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
// Now serialize the document contents
nsIScriptGlobalObject* globalObject = GetScriptGlobalObject();
NS_ENSURE_TRUE(globalObject, NS_ERROR_UNEXPECTED);
count = mProcessingInstructions.Length();
for (i = 0; i < count; ++i) {
nsXULPrototypePI* pi = mProcessingInstructions[i];
tmp = pi->Serialize(aStream, globalObject, &nodeInfos);
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
if (mRoot) {
tmp = mRoot->Serialize(aStream, globalObject, &nodeInfos);
if (NS_FAILED(tmp)) {
rv = tmp;
}
}
return rv;
}
//----------------------------------------------------------------------
//
nsresult
nsXULPrototypeDocument::InitPrincipal(nsIURI* aURI, nsIPrincipal* aPrincipal)
{
NS_ENSURE_ARG_POINTER(aURI);
mURI = aURI;
mNodeInfoManager->SetDocumentPrincipal(aPrincipal);
return NS_OK;
}
nsIURI*
nsXULPrototypeDocument::GetURI()
{
NS_ASSERTION(mURI, "null URI");
return mURI;
}
nsXULPrototypeElement*
nsXULPrototypeDocument::GetRootElement()
{
return mRoot;
}
void
nsXULPrototypeDocument::SetRootElement(nsXULPrototypeElement* aElement)
{
mRoot = aElement;
}
nsresult
nsXULPrototypeDocument::AddProcessingInstruction(nsXULPrototypePI* aPI)
{
NS_PRECONDITION(aPI, "null ptr");
if (!mProcessingInstructions.AppendElement(aPI)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
const nsTArray<nsRefPtr<nsXULPrototypePI> >&
nsXULPrototypeDocument::GetProcessingInstructions() const
{
return mProcessingInstructions;
}
void
nsXULPrototypeDocument::AddStyleSheetReference(nsIURI* aURI)
{
NS_PRECONDITION(aURI, "null ptr");
if (!mStyleSheetReferences.AppendObject(aURI)) {
NS_WARNING("mStyleSheetReferences->AppendElement() failed."
"Stylesheet overlay dropped.");
}
}
const nsCOMArray<nsIURI>&
nsXULPrototypeDocument::GetStyleSheetReferences() const
{
return mStyleSheetReferences;
}
NS_IMETHODIMP
nsXULPrototypeDocument::GetHeaderData(nsIAtom* aField, nsAString& aData) const
{
// XXX Not implemented
aData.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsXULPrototypeDocument::SetHeaderData(nsIAtom* aField, const nsAString& aData)
{
// XXX Not implemented
return NS_OK;
}
nsIPrincipal*
nsXULPrototypeDocument::DocumentPrincipal()
{
NS_PRECONDITION(mNodeInfoManager, "missing nodeInfoManager");
return mNodeInfoManager->DocumentPrincipal();
}
void
nsXULPrototypeDocument::SetDocumentPrincipal(nsIPrincipal* aPrincipal)
{
mNodeInfoManager->SetDocumentPrincipal(aPrincipal);
}
nsNodeInfoManager*
nsXULPrototypeDocument::GetNodeInfoManager()
{
return mNodeInfoManager;
}
nsresult
nsXULPrototypeDocument::AwaitLoadDone(XULDocument* aDocument, bool* aResult)
{
nsresult rv = NS_OK;
*aResult = mLoaded;
if (!mLoaded) {
rv = mPrototypeWaiters.AppendElement(aDocument)
? NS_OK : NS_ERROR_OUT_OF_MEMORY; // addrefs
}
return rv;
}
nsresult
nsXULPrototypeDocument::NotifyLoadDone()
{
// Call back to each XUL document that raced to start the same
// prototype document load, lost the race, but hit the XUL
// prototype cache because the winner filled the cache with
// the not-yet-loaded prototype object.
nsresult rv = NS_OK;
mLoaded = true;
for (uint32_t i = mPrototypeWaiters.Length(); i > 0; ) {
--i;
// true means that OnPrototypeLoadDone will also
// call ResumeWalk().
rv = mPrototypeWaiters[i]->OnPrototypeLoadDone(true);
if (NS_FAILED(rv)) break;
}
mPrototypeWaiters.Clear();
return rv;
}
void
nsXULPrototypeDocument::TraceProtos(JSTracer* aTrc, uint32_t aGCNumber)
{
// Only trace the protos once per GC.
if (mGCNumber == aGCNumber) {
return;
}
mGCNumber = aGCNumber;
if (mRoot) {
mRoot->TraceAllScripts(aTrc);
}
}
//----------------------------------------------------------------------
//
// nsIScriptGlobalObjectOwner methods
//
nsIScriptGlobalObject*
nsXULPrototypeDocument::GetScriptGlobalObject()
{
if (!mGlobalObject)
mGlobalObject = NewXULPDGlobalObject();
return mGlobalObject;
}
//----------------------------------------------------------------------
//
// nsXULPDGlobalObject
//
nsXULPDGlobalObject::nsXULPDGlobalObject(nsXULPrototypeDocument* owner)
: mGlobalObjectOwner(owner)
, mJSObject(nullptr)
{
}
nsXULPDGlobalObject::~nsXULPDGlobalObject()
{
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsXULPDGlobalObject)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsXULPDGlobalObject)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXULPDGlobalObject)
NS_INTERFACE_MAP_ENTRY(nsIScriptGlobalObject)
NS_INTERFACE_MAP_ENTRY(nsIScriptObjectPrincipal)
NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIScriptGlobalObject)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXULPDGlobalObject)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXULPDGlobalObject)
//----------------------------------------------------------------------
//
// nsIScriptGlobalObject methods
//
nsresult
nsXULPDGlobalObject::EnsureScriptEnvironment()
{
if (mContext) {
return NS_OK;
}
NS_ASSERTION(!mJSObject, "Have global without context?");
nsCOMPtr<nsIScriptRuntime> languageRuntime;
nsresult rv = NS_GetJSRuntime(getter_AddRefs(languageRuntime));
NS_ENSURE_SUCCESS(rv, NS_OK);
nsCOMPtr<nsIScriptContext> ctxNew = languageRuntime->CreateContext(false, nullptr);
MOZ_ASSERT(ctxNew);
// We have to setup a special global object. We do this then
// attach it as the global for this context. Then, we
// will re-fetch the global and set it up in our language globals array.
{
AutoPushJSContext cx(ctxNew->GetNativeContext());
JS::Rooted<JSObject*> newGlob(cx,
JS_NewGlobalObject(cx, &gSharedGlobalClass,
nsJSPrincipals::get(GetPrincipal()), JS::SystemZone));
if (!newGlob)
return NS_OK;
::JS_SetGlobalObject(cx, newGlob);
// Add an owning reference from JS back to us. This'll be
// released when the JSObject is finalized.
::JS_SetPrivate(newGlob, this);
NS_ADDREF(this);
}
// should probably assert the context is clean???
ctxNew->WillInitializeContext();
rv = ctxNew->InitContext();
NS_ENSURE_SUCCESS(rv, NS_OK);
ctxNew->DidInitializeContext();
JSObject* global = ctxNew->GetNativeGlobal();
NS_ASSERTION(global, "GetNativeGlobal returned nullptr!");
mContext = ctxNew;
mJSObject = global;
// Set the location information for the new global, so that tools like
// about:memory may use that information
nsIURI *ownerURI = mGlobalObjectOwner->GetURI();
xpc::SetLocationForGlobal(mJSObject, ownerURI);
return NS_OK;
}
nsIScriptContext*
nsXULPDGlobalObject::GetScriptContext()
{
// This global object creates a context on demand - do that now.
nsresult rv = EnsureScriptEnvironment();
if (NS_FAILED(rv)) {
NS_ERROR("Failed to setup script language");
return nullptr;
}
return mContext;
}
JSObject*
nsXULPDGlobalObject::GetGlobalJSObject()
{
return xpc_UnmarkGrayObject(mJSObject);
}
void
nsXULPDGlobalObject::ClearGlobalObjectOwner()
{
NS_ASSERTION(!mCachedPrincipal, "This shouldn't ever be set until now!");
// Cache mGlobalObjectOwner's principal if possible.
if (this != nsXULPrototypeDocument::gSystemGlobal)
mCachedPrincipal = mGlobalObjectOwner->DocumentPrincipal();
mContext = nullptr;
mGlobalObjectOwner = nullptr;
}
void
nsXULPDGlobalObject::OnFinalize(JSObject* aObject)
{
mJSObject = nullptr;
}
void
nsXULPDGlobalObject::SetScriptsEnabled(bool aEnabled, bool aFireTimeouts)
{
// We don't care...
}
//----------------------------------------------------------------------
//
// nsIScriptObjectPrincipal methods
//
nsIPrincipal*
nsXULPDGlobalObject::GetPrincipal()
{
if (!mGlobalObjectOwner) {
// See nsXULPrototypeDocument::NewXULPDGlobalObject, the comment
// about gSystemGlobal implying gSystemPrincipal.
if (this == nsXULPrototypeDocument::gSystemGlobal) {
return nsXULPrototypeDocument::gSystemPrincipal;
}
// Return the cached principal if it exists.
return mCachedPrincipal;
}
return mGlobalObjectOwner->DocumentPrincipal();
}