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gecko-dev
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gecko-dev/dom/base/nsDocument.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/. */
/*
* Base class for all our document implementations.
*/
#include "nsDocument.h"
#include "nsIDocumentInlines.h"
#include "mozilla/AnimationComparator.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/BinarySearch.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/EffectSet.h"
#include "mozilla/IntegerRange.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Likely.h"
#include <algorithm>
#include "mozilla/Logging.h"
#include "plstr.h"
#include "mozilla/Sprintf.h"
#include "mozilla/Telemetry.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsILoadContext.h"
#include "nsITextControlFrame.h"
#include "nsNumberControlFrame.h"
#include "nsUnicharUtils.h"
#include "nsContentList.h"
#include "nsCSSPseudoElements.h"
#include "nsIObserver.h"
#include "nsIBaseWindow.h"
#include "mozilla/css/Loader.h"
#include "mozilla/css/ImageLoader.h"
#include "nsDocShell.h"
#include "nsDocShellLoadTypes.h"
#include "nsIDocShellTreeItem.h"
#include "nsCOMArray.h"
#include "nsQueryObject.h"
#include "nsDOMClassInfo.h"
#include "mozilla/Services.h"
#include "nsScreen.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStateManager.h"
#include "nsIDOMNodeFilter.h"
#include "nsIDOMStyleSheet.h"
#include "mozilla/dom/Attr.h"
#include "nsIDOMDOMImplementation.h"
#include "nsIDOMDocumentXBL.h"
#include "mozilla/dom/Element.h"
#include "nsGenericHTMLElement.h"
#include "mozilla/dom/CDATASection.h"
#include "mozilla/dom/ProcessingInstruction.h"
#include "nsDOMString.h"
#include "nsNodeUtils.h"
#include "nsLayoutUtils.h" // for GetFrameForPoint
#include "nsIFrame.h"
#include "nsITabChild.h"
#include "nsRange.h"
#include "nsIDOMText.h"
#include "nsIDOMComment.h"
#include "mozilla/dom/DocumentType.h"
#include "mozilla/dom/NodeIterator.h"
#include "mozilla/dom/TreeWalker.h"
#include "nsIServiceManager.h"
#include "mozilla/dom/workers/ServiceWorkerManager.h"
#include "imgLoader.h"
#include "nsCanvasFrame.h"
#include "nsContentCID.h"
#include "nsError.h"
#include "nsPresShell.h"
#include "nsPresContext.h"
#include "nsIJSON.h"
#include "nsThreadUtils.h"
#include "nsNodeInfoManager.h"
#include "nsIFileChannel.h"
#include "nsIMultiPartChannel.h"
#include "nsIRefreshURI.h"
#include "nsIWebNavigation.h"
#include "nsIScriptError.h"
#include "nsISimpleEnumerator.h"
#include "nsStyleSheetService.h"
#include "nsNetUtil.h" // for NS_NewURI
#include "nsIInputStreamChannel.h"
#include "nsIAuthPrompt.h"
#include "nsIAuthPrompt2.h"
#include "nsIScriptSecurityManager.h"
#include "nsIPermissionManager.h"
#include "nsIPrincipal.h"
#include "nsIDOMWindow.h"
#include "nsPIDOMWindow.h"
#include "nsIDOMElement.h"
#include "nsFocusManager.h"
// for radio group stuff
#include "nsIDOMHTMLInputElement.h"
#include "nsIRadioVisitor.h"
#include "nsIFormControl.h"
#include "nsBidiUtils.h"
#include "nsIParserService.h"
#include "nsContentCreatorFunctions.h"
#include "nsIScriptContext.h"
#include "nsBindingManager.h"
#include "nsIDOMHTMLDocument.h"
#include "nsHTMLDocument.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIRequest.h"
#include "nsHostObjectProtocolHandler.h"
#include "nsCharsetSource.h"
#include "nsIParser.h"
#include "nsIContentSink.h"
#include "nsDateTimeFormatCID.h"
#include "nsIDateTimeFormat.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStates.h"
#include "mozilla/InternalMutationEvent.h"
#include "nsDOMCID.h"
#include "jsapi.h"
#include "nsIXPConnect.h"
#include "xpcpublic.h"
#include "nsCCUncollectableMarker.h"
#include "nsIContentPolicy.h"
#include "nsContentPolicyUtils.h"
#include "nsICategoryManager.h"
#include "nsIDocumentLoaderFactory.h"
#include "nsIDocumentLoader.h"
#include "nsIContentViewer.h"
#include "nsIXMLContentSink.h"
#include "nsIXULDocument.h"
#include "nsIPrompt.h"
#include "nsIPropertyBag2.h"
#include "mozilla/dom/PageTransitionEvent.h"
#include "mozilla/dom/StyleRuleChangeEvent.h"
#include "mozilla/dom/StyleSheetChangeEvent.h"
#include "mozilla/dom/StyleSheetApplicableStateChangeEvent.h"
#include "nsJSUtils.h"
#include "nsFrameLoader.h"
#include "nsEscape.h"
#include "nsObjectLoadingContent.h"
#include "nsHtml5TreeOpExecutor.h"
#include "mozilla/dom/HTMLLinkElement.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/HTMLIFrameElement.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/MediaSource.h"
#include "mozilla/dom/FlyWebService.h"
#include "mozAutoDocUpdate.h"
#include "nsGlobalWindow.h"
#include "mozilla/dom/EncodingUtils.h"
#include "nsDOMNavigationTiming.h"
#include "nsSMILAnimationController.h"
#include "imgIContainer.h"
#include "nsSVGUtils.h"
#include "nsRefreshDriver.h"
// FOR CSP (autogenerated by xpidl)
#include "nsIContentSecurityPolicy.h"
#include "mozilla/dom/nsCSPContext.h"
#include "mozilla/dom/nsCSPService.h"
#include "mozilla/dom/nsCSPUtils.h"
#include "nsHTMLStyleSheet.h"
#include "nsHTMLCSSStyleSheet.h"
#include "SVGAttrAnimationRuleProcessor.h"
#include "mozilla/dom/DOMImplementation.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/Comment.h"
#include "nsTextNode.h"
#include "mozilla/dom/Link.h"
#include "mozilla/dom/HTMLElementBinding.h"
#include "nsXULAppAPI.h"
#include "mozilla/dom/Touch.h"
#include "mozilla/dom/TouchEvent.h"
#include "mozilla/Preferences.h"
#include "imgILoader.h"
#include "imgRequestProxy.h"
#include "nsWrapperCacheInlines.h"
#include "nsSandboxFlags.h"
#include "nsIAddonPolicyService.h"
#include "nsIAppsService.h"
#include "mozilla/dom/AnimatableBinding.h"
#include "mozilla/dom/AnonymousContent.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/DocumentTimeline.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/MediaQueryList.h"
#include "mozilla/dom/NodeFilterBinding.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/dom/UndoManager.h"
#include "mozilla/dom/WebComponentsBinding.h"
#include "mozilla/dom/CustomElementsRegistryBinding.h"
#include "mozilla/dom/CustomElementsRegistry.h"
#include "nsFrame.h"
#include "nsDOMCaretPosition.h"
#include "nsIDOMHTMLTextAreaElement.h"
#include "nsViewportInfo.h"
#include "mozilla/StaticPtr.h"
#include "nsITextControlElement.h"
#include "nsIDOMNSEditableElement.h"
#include "nsIEditor.h"
#include "nsIDOMCSSStyleRule.h"
#include "mozilla/css/Rule.h"
#include "nsIDOMLocation.h"
#include "nsIHttpChannelInternal.h"
#include "nsISecurityConsoleMessage.h"
#include "nsCharSeparatedTokenizer.h"
#include "mozilla/dom/XPathEvaluator.h"
#include "mozilla/dom/XPathNSResolverBinding.h"
#include "mozilla/dom/XPathResult.h"
#include "nsIDocumentEncoder.h"
#include "nsIDocumentActivity.h"
#include "nsIStructuredCloneContainer.h"
#include "nsIMutableArray.h"
#include "mozilla/dom/DOMStringList.h"
#include "nsWindowMemoryReporter.h"
#include "mozilla/dom/Location.h"
#include "mozilla/dom/FontFaceSet.h"
#include "mozilla/dom/BoxObject.h"
#include "gfxPrefs.h"
#include "nsISupportsPrimitives.h"
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "mozilla/DocLoadingTimelineMarker.h"
#include "nsISpeculativeConnect.h"
#include "mozilla/MediaManager.h"
#ifdef MOZ_WEBRTC
#include "IPeerConnection.h"
#endif // MOZ_WEBRTC
using namespace mozilla;
using namespace mozilla::dom;
typedef nsTArray<Link*> LinkArray;
static LazyLogModule gDocumentLeakPRLog("DocumentLeak");
static LazyLogModule gCspPRLog("CSP");
static nsresult
GetHttpChannelHelper(nsIChannel* aChannel, nsIHttpChannel** aHttpChannel)
{
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
if (httpChannel) {
httpChannel.forget(aHttpChannel);
return NS_OK;
}
nsCOMPtr<nsIMultiPartChannel> multipart = do_QueryInterface(aChannel);
if (!multipart) {
*aHttpChannel = nullptr;
return NS_OK;
}
nsCOMPtr<nsIChannel> baseChannel;
nsresult rv = multipart->GetBaseChannel(getter_AddRefs(baseChannel));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
httpChannel = do_QueryInterface(baseChannel);
httpChannel.forget(aHttpChannel);
return NS_OK;
}
#define NAME_NOT_VALID ((nsSimpleContentList*)1)
nsIdentifierMapEntry::~nsIdentifierMapEntry()
{
}
void
nsIdentifierMapEntry::Traverse(nsCycleCollectionTraversalCallback* aCallback)
{
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCallback,
"mIdentifierMap mNameContentList");
aCallback->NoteXPCOMChild(static_cast<nsIDOMNodeList*>(mNameContentList));
if (mImageElement) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCallback,
"mIdentifierMap mImageElement element");
nsIContent* imageElement = mImageElement;
aCallback->NoteXPCOMChild(imageElement);
}
}
bool
nsIdentifierMapEntry::IsEmpty()
{
return mIdContentList.IsEmpty() && !mNameContentList &&
!mChangeCallbacks && !mImageElement;
}
Element*
nsIdentifierMapEntry::GetIdElement()
{
return mIdContentList.SafeElementAt(0);
}
Element*
nsIdentifierMapEntry::GetImageIdElement()
{
return mImageElement ? mImageElement.get() : GetIdElement();
}
void
nsIdentifierMapEntry::AppendAllIdContent(nsCOMArray<nsIContent>* aElements)
{
for (size_t i = 0; i < mIdContentList.Length(); ++i) {
aElements->AppendObject(mIdContentList[i]);
}
}
void
nsIdentifierMapEntry::AddContentChangeCallback(nsIDocument::IDTargetObserver aCallback,
void* aData, bool aForImage)
{
if (!mChangeCallbacks) {
mChangeCallbacks = new nsTHashtable<ChangeCallbackEntry>;
}
ChangeCallback cc = { aCallback, aData, aForImage };
mChangeCallbacks->PutEntry(cc);
}
void
nsIdentifierMapEntry::RemoveContentChangeCallback(nsIDocument::IDTargetObserver aCallback,
void* aData, bool aForImage)
{
if (!mChangeCallbacks)
return;
ChangeCallback cc = { aCallback, aData, aForImage };
mChangeCallbacks->RemoveEntry(cc);
if (mChangeCallbacks->Count() == 0) {
mChangeCallbacks = nullptr;
}
}
void
nsIdentifierMapEntry::FireChangeCallbacks(Element* aOldElement,
Element* aNewElement,
bool aImageOnly)
{
if (!mChangeCallbacks)
return;
for (auto iter = mChangeCallbacks->ConstIter(); !iter.Done(); iter.Next()) {
nsIdentifierMapEntry::ChangeCallbackEntry* entry = iter.Get();
// Don't fire image changes for non-image observers, and don't fire element
// changes for image observers when an image override is active.
if (entry->mKey.mForImage ? (mImageElement && !aImageOnly) : aImageOnly) {
continue;
}
if (!entry->mKey.mCallback(aOldElement, aNewElement, entry->mKey.mData)) {
iter.Remove();
}
}
}
namespace {
struct PositionComparator
{
Element* const mElement;
explicit PositionComparator(Element* const aElement) : mElement(aElement) {}
int operator()(void* aElement) const {
Element* curElement = static_cast<Element*>(aElement);
if (mElement == curElement) {
return 0;
}
if (nsContentUtils::PositionIsBefore(mElement, curElement)) {
return -1;
}
return 1;
}
};
} // namespace
bool
nsIdentifierMapEntry::AddIdElement(Element* aElement)
{
NS_PRECONDITION(aElement, "Must have element");
NS_PRECONDITION(!mIdContentList.Contains(nullptr),
"Why is null in our list?");
#ifdef DEBUG
Element* currentElement = mIdContentList.SafeElementAt(0);
#endif
// Common case
if (mIdContentList.IsEmpty()) {
if (!mIdContentList.AppendElement(aElement))
return false;
NS_ASSERTION(currentElement == nullptr, "How did that happen?");
FireChangeCallbacks(nullptr, aElement);
return true;
}
// We seem to have multiple content nodes for the same id, or XUL is messing
// with us. Search for the right place to insert the content.
size_t idx;
if (BinarySearchIf(mIdContentList, 0, mIdContentList.Length(),
PositionComparator(aElement), &idx)) {
// Already in the list, so already in the right spot. Get out of here.
// XXXbz this only happens because XUL does all sorts of random
// UpdateIdTableEntry calls. Hate, hate, hate!
return true;
}
if (!mIdContentList.InsertElementAt(idx, aElement)) {
return false;
}
if (idx == 0) {
Element* oldElement = mIdContentList.SafeElementAt(1);
NS_ASSERTION(currentElement == oldElement, "How did that happen?");
FireChangeCallbacks(oldElement, aElement);
}
return true;
}
void
nsIdentifierMapEntry::RemoveIdElement(Element* aElement)
{
NS_PRECONDITION(aElement, "Missing element");
// This should only be called while the document is in an update.
// Assertions near the call to this method guarantee this.
// This could fire in OOM situations
// Only assert this in HTML documents for now as XUL does all sorts of weird
// crap.
NS_ASSERTION(!aElement->OwnerDoc()->IsHTMLDocument() ||
mIdContentList.Contains(aElement),
"Removing id entry that doesn't exist");
// XXXbz should this ever Compact() I guess when all the content is gone
// we'll just get cleaned up in the natural order of things...
Element* currentElement = mIdContentList.SafeElementAt(0);
mIdContentList.RemoveElement(aElement);
if (currentElement == aElement) {
FireChangeCallbacks(currentElement, mIdContentList.SafeElementAt(0));
}
}
void
nsIdentifierMapEntry::SetImageElement(Element* aElement)
{
Element* oldElement = GetImageIdElement();
mImageElement = aElement;
Element* newElement = GetImageIdElement();
if (oldElement != newElement) {
FireChangeCallbacks(oldElement, newElement, true);
}
}
void
nsIdentifierMapEntry::AddNameElement(nsINode* aNode, Element* aElement)
{
if (!mNameContentList) {
mNameContentList = new nsSimpleContentList(aNode);
}
mNameContentList->AppendElement(aElement);
}
void
nsIdentifierMapEntry::RemoveNameElement(Element* aElement)
{
if (mNameContentList) {
mNameContentList->RemoveElement(aElement);
}
}
bool
nsIdentifierMapEntry::HasIdElementExposedAsHTMLDocumentProperty()
{
Element* idElement = GetIdElement();
return idElement &&
nsGenericHTMLElement::ShouldExposeIdAsHTMLDocumentProperty(idElement);
}
size_t
nsIdentifierMapEntry::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
return nsStringHashKey::SizeOfExcludingThis(aMallocSizeOf);
}
// Helper structs for the content->subdoc map
class SubDocMapEntry : public PLDHashEntryHdr
{
public:
// Both of these are strong references
Element *mKey; // must be first, to look like PLDHashEntryStub
nsIDocument *mSubDocument;
};
/**
* A struct that holds all the information about a radio group.
*/
struct nsRadioGroupStruct
{
nsRadioGroupStruct()
: mRequiredRadioCount(0)
, mGroupSuffersFromValueMissing(false)
{}
/**
* A strong pointer to the currently selected radio button.
*/
RefPtr<HTMLInputElement> mSelectedRadioButton;
nsCOMArray<nsIFormControl> mRadioButtons;
uint32_t mRequiredRadioCount;
bool mGroupSuffersFromValueMissing;
};
nsDOMStyleSheetList::nsDOMStyleSheetList(nsIDocument *aDocument)
{
mLength = -1;
// Not reference counted to avoid circular references.
// The document will tell us when its going away.
mDocument = aDocument;
mDocument->AddObserver(this);
}
nsDOMStyleSheetList::~nsDOMStyleSheetList()
{
if (mDocument) {
mDocument->RemoveObserver(this);
}
}
NS_IMPL_ISUPPORTS_INHERITED(nsDOMStyleSheetList, StyleSheetList,
nsIDocumentObserver,
nsIMutationObserver)
uint32_t
nsDOMStyleSheetList::Length()
{
if (!mDocument) {
return 0;
}
// XXX Find the number and then cache it. We'll use the
// observer notification to figure out if new ones have
// been added or removed.
if (-1 == mLength) {
mLength = mDocument->GetNumberOfStyleSheets();
}
return mLength;
}
CSSStyleSheet*
nsDOMStyleSheetList::IndexedGetter(uint32_t aIndex, bool& aFound)
{
if (!mDocument || aIndex >= (uint32_t)mDocument->GetNumberOfStyleSheets()) {
aFound = false;
return nullptr;
}
aFound = true;
StyleSheet* sheet = mDocument->GetStyleSheetAt(aIndex);
NS_ASSERTION(sheet, "Must have a sheet");
// XXXheycam Return null until ServoStyleSheet implements the right DOM
// interfaces.
if (sheet->IsServo()) {
NS_ERROR("stylo: can't return a ServoStyleSheet to the DOM yet");
return nullptr;
}
return sheet->AsGecko();
}
void
nsDOMStyleSheetList::NodeWillBeDestroyed(const nsINode *aNode)
{
mDocument = nullptr;
}
void
nsDOMStyleSheetList::StyleSheetAdded(StyleSheet* aStyleSheet,
bool aDocumentSheet)
{
if (aDocumentSheet && -1 != mLength) {
mLength++;
}
}
void
nsDOMStyleSheetList::StyleSheetRemoved(StyleSheet* aStyleSheet,
bool aDocumentSheet)
{
if (aDocumentSheet && -1 != mLength) {
mLength--;
}
}
// nsOnloadBlocker implementation
NS_IMPL_ISUPPORTS(nsOnloadBlocker, nsIRequest)
NS_IMETHODIMP
nsOnloadBlocker::GetName(nsACString &aResult)
{
aResult.AssignLiteral("about:document-onload-blocker");
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::IsPending(bool *_retval)
{
*_retval = true;
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::GetStatus(nsresult *status)
{
*status = NS_OK;
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::Cancel(nsresult status)
{
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::Suspend(void)
{
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::Resume(void)
{
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::GetLoadGroup(nsILoadGroup * *aLoadGroup)
{
*aLoadGroup = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::SetLoadGroup(nsILoadGroup * aLoadGroup)
{
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::GetLoadFlags(nsLoadFlags *aLoadFlags)
{
*aLoadFlags = nsIRequest::LOAD_NORMAL;
return NS_OK;
}
NS_IMETHODIMP
nsOnloadBlocker::SetLoadFlags(nsLoadFlags aLoadFlags)
{
return NS_OK;
}
// ==================================================================
nsExternalResourceMap::nsExternalResourceMap()
: mHaveShutDown(false)
{
}
nsIDocument*
nsExternalResourceMap::RequestResource(nsIURI* aURI,
nsINode* aRequestingNode,
nsDocument* aDisplayDocument,
ExternalResourceLoad** aPendingLoad)
{
// If we ever start allowing non-same-origin loads here, we might need to do
// something interesting with aRequestingPrincipal even for the hashtable
// gets.
NS_PRECONDITION(aURI, "Must have a URI");
NS_PRECONDITION(aRequestingNode, "Must have a node");
*aPendingLoad = nullptr;
if (mHaveShutDown) {
return nullptr;
}
// First, make sure we strip the ref from aURI.
nsCOMPtr<nsIURI> clone;
nsresult rv = aURI->CloneIgnoringRef(getter_AddRefs(clone));
if (NS_FAILED(rv) || !clone) {
return nullptr;
}
ExternalResource* resource;
mMap.Get(clone, &resource);
if (resource) {
return resource->mDocument;
}
RefPtr<PendingLoad> load;
mPendingLoads.Get(clone, getter_AddRefs(load));
if (load) {
load.forget(aPendingLoad);
return nullptr;
}
load = new PendingLoad(aDisplayDocument);
mPendingLoads.Put(clone, load);
if (NS_FAILED(load->StartLoad(clone, aRequestingNode))) {
// Make sure we don't thrash things by trying this load again, since
// chances are it failed for good reasons (security check, etc).
AddExternalResource(clone, nullptr, nullptr, aDisplayDocument);
} else {
load.forget(aPendingLoad);
}
return nullptr;
}
void
nsExternalResourceMap::EnumerateResources(nsIDocument::nsSubDocEnumFunc aCallback,
void* aData)
{
for (auto iter = mMap.Iter(); !iter.Done(); iter.Next()) {
nsExternalResourceMap::ExternalResource* resource = iter.UserData();
if (resource->mDocument && !aCallback(resource->mDocument, aData)) {
break;
}
}
}
void
nsExternalResourceMap::Traverse(nsCycleCollectionTraversalCallback* aCallback) const
{
// mPendingLoads will get cleared out as the requests complete, so
// no need to worry about those here.
for (auto iter = mMap.ConstIter(); !iter.Done(); iter.Next()) {
nsExternalResourceMap::ExternalResource* resource = iter.UserData();
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCallback,
"mExternalResourceMap.mMap entry"
"->mDocument");
aCallback->NoteXPCOMChild(resource->mDocument);
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCallback,
"mExternalResourceMap.mMap entry"
"->mViewer");
aCallback->NoteXPCOMChild(resource->mViewer);
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*aCallback,
"mExternalResourceMap.mMap entry"
"->mLoadGroup");
aCallback->NoteXPCOMChild(resource->mLoadGroup);
}
}
void
nsExternalResourceMap::HideViewers()
{
for (auto iter = mMap.Iter(); !iter.Done(); iter.Next()) {
nsCOMPtr<nsIContentViewer> viewer = iter.UserData()->mViewer;
if (viewer) {
viewer->Hide();
}
}
}
void
nsExternalResourceMap::ShowViewers()
{
for (auto iter = mMap.Iter(); !iter.Done(); iter.Next()) {
nsCOMPtr<nsIContentViewer> viewer = iter.UserData()->mViewer;
if (viewer) {
viewer->Show();
}
}
}
void
TransferZoomLevels(nsIDocument* aFromDoc,
nsIDocument* aToDoc)
{
MOZ_ASSERT(aFromDoc && aToDoc,
"transferring zoom levels from/to null doc");
nsIPresShell* fromShell = aFromDoc->GetShell();
if (!fromShell)
return;
nsPresContext* fromCtxt = fromShell->GetPresContext();
if (!fromCtxt)
return;
nsIPresShell* toShell = aToDoc->GetShell();
if (!toShell)
return;
nsPresContext* toCtxt = toShell->GetPresContext();
if (!toCtxt)
return;
toCtxt->SetFullZoom(fromCtxt->GetFullZoom());
toCtxt->SetBaseMinFontSize(fromCtxt->BaseMinFontSize());
toCtxt->SetTextZoom(fromCtxt->TextZoom());
toCtxt->SetOverrideDPPX(fromCtxt->GetOverrideDPPX());
}
void
TransferShowingState(nsIDocument* aFromDoc, nsIDocument* aToDoc)
{
MOZ_ASSERT(aFromDoc && aToDoc,
"transferring showing state from/to null doc");
if (aFromDoc->IsShowing()) {
aToDoc->OnPageShow(true, nullptr);
}
}
nsresult
nsExternalResourceMap::AddExternalResource(nsIURI* aURI,
nsIContentViewer* aViewer,
nsILoadGroup* aLoadGroup,
nsIDocument* aDisplayDocument)
{
NS_PRECONDITION(aURI, "Unexpected call");
NS_PRECONDITION((aViewer && aLoadGroup) || (!aViewer && !aLoadGroup),
"Must have both or neither");
RefPtr<PendingLoad> load;
mPendingLoads.Get(aURI, getter_AddRefs(load));
mPendingLoads.Remove(aURI);
nsresult rv = NS_OK;
nsCOMPtr<nsIDocument> doc;
if (aViewer) {
doc = aViewer->GetDocument();
NS_ASSERTION(doc, "Must have a document");
nsCOMPtr<nsIXULDocument> xulDoc = do_QueryInterface(doc);
if (xulDoc) {
// We don't handle XUL stuff here yet.
rv = NS_ERROR_NOT_AVAILABLE;
} else {
doc->SetDisplayDocument(aDisplayDocument);
// Make sure that hiding our viewer will tear down its presentation.
aViewer->SetSticky(false);
rv = aViewer->Init(nullptr, nsIntRect(0, 0, 0, 0));
if (NS_SUCCEEDED(rv)) {
rv = aViewer->Open(nullptr, nullptr);
}
}
if (NS_FAILED(rv)) {
doc = nullptr;
aViewer = nullptr;
aLoadGroup = nullptr;
}
}
ExternalResource* newResource = new ExternalResource();
mMap.Put(aURI, newResource);
newResource->mDocument = doc;
newResource->mViewer = aViewer;
newResource->mLoadGroup = aLoadGroup;
if (doc) {
TransferZoomLevels(aDisplayDocument, doc);
TransferShowingState(aDisplayDocument, doc);
}
const nsTArray< nsCOMPtr<nsIObserver> > & obs = load->Observers();
for (uint32_t i = 0; i < obs.Length(); ++i) {
obs[i]->Observe(doc, "external-resource-document-created", nullptr);
}
return rv;
}
NS_IMPL_ISUPPORTS(nsExternalResourceMap::PendingLoad,
nsIStreamListener,
nsIRequestObserver)
NS_IMETHODIMP
nsExternalResourceMap::PendingLoad::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
nsExternalResourceMap& map = mDisplayDocument->ExternalResourceMap();
if (map.HaveShutDown()) {
return NS_BINDING_ABORTED;
}
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = SetupViewer(aRequest, getter_AddRefs(viewer),
getter_AddRefs(loadGroup));
// Make sure to do this no matter what
nsresult rv2 = map.AddExternalResource(mURI, viewer, loadGroup,
mDisplayDocument);
if (NS_FAILED(rv)) {
return rv;
}
if (NS_FAILED(rv2)) {
mTargetListener = nullptr;
return rv2;
}
return mTargetListener->OnStartRequest(aRequest, aContext);
}
nsresult
nsExternalResourceMap::PendingLoad::SetupViewer(nsIRequest* aRequest,
nsIContentViewer** aViewer,
nsILoadGroup** aLoadGroup)
{
NS_PRECONDITION(!mTargetListener, "Unexpected call to OnStartRequest");
*aViewer = nullptr;
*aLoadGroup = nullptr;
nsCOMPtr<nsIChannel> chan(do_QueryInterface(aRequest));
NS_ENSURE_TRUE(chan, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aRequest));
if (httpChannel) {
bool requestSucceeded;
if (NS_FAILED(httpChannel->GetRequestSucceeded(&requestSucceeded)) ||
!requestSucceeded) {
// Bail out on this load, since it looks like we have an HTTP error page
return NS_BINDING_ABORTED;
}
}
nsAutoCString type;
chan->GetContentType(type);
nsCOMPtr<nsILoadGroup> loadGroup;
chan->GetLoadGroup(getter_AddRefs(loadGroup));
// Give this document its own loadgroup
nsCOMPtr<nsILoadGroup> newLoadGroup =
do_CreateInstance(NS_LOADGROUP_CONTRACTID);
NS_ENSURE_TRUE(newLoadGroup, NS_ERROR_OUT_OF_MEMORY);
newLoadGroup->SetLoadGroup(loadGroup);
nsCOMPtr<nsIInterfaceRequestor> callbacks;
loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
nsCOMPtr<nsIInterfaceRequestor> newCallbacks =
new LoadgroupCallbacks(callbacks);
newLoadGroup->SetNotificationCallbacks(newCallbacks);
// This is some serious hackery cribbed from docshell
nsCOMPtr<nsICategoryManager> catMan =
do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
NS_ENSURE_TRUE(catMan, NS_ERROR_NOT_AVAILABLE);
nsXPIDLCString contractId;
nsresult rv = catMan->GetCategoryEntry("Gecko-Content-Viewers", type.get(),
getter_Copies(contractId));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
do_GetService(contractId);
NS_ENSURE_TRUE(docLoaderFactory, NS_ERROR_NOT_AVAILABLE);
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsIStreamListener> listener;
rv = docLoaderFactory->CreateInstance("external-resource", chan, newLoadGroup,
type, nullptr, nullptr,
getter_AddRefs(listener),
getter_AddRefs(viewer));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(viewer, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIParser> parser = do_QueryInterface(listener);
if (!parser) {
/// We don't want to deal with the various fake documents yet
return NS_ERROR_NOT_IMPLEMENTED;
}
// We can't handle HTML and other weird things here yet.
nsIContentSink* sink = parser->GetContentSink();
nsCOMPtr<nsIXMLContentSink> xmlSink = do_QueryInterface(sink);
if (!xmlSink) {
return NS_ERROR_NOT_IMPLEMENTED;
}
listener.swap(mTargetListener);
viewer.forget(aViewer);
newLoadGroup.forget(aLoadGroup);
return NS_OK;
}
NS_IMETHODIMP
nsExternalResourceMap::PendingLoad::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aStream,
uint64_t aOffset,
uint32_t aCount)
{
NS_PRECONDITION(mTargetListener, "Shouldn't be getting called!");
if (mDisplayDocument->ExternalResourceMap().HaveShutDown()) {
return NS_BINDING_ABORTED;
}
return mTargetListener->OnDataAvailable(aRequest, aContext, aStream, aOffset,
aCount);
}
NS_IMETHODIMP
nsExternalResourceMap::PendingLoad::OnStopRequest(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatus)
{
// mTargetListener might be null if SetupViewer or AddExternalResource failed
if (mTargetListener) {
nsCOMPtr<nsIStreamListener> listener;
mTargetListener.swap(listener);
return listener->OnStopRequest(aRequest, aContext, aStatus);
}
return NS_OK;
}
nsresult
nsExternalResourceMap::PendingLoad::StartLoad(nsIURI* aURI,
nsINode* aRequestingNode)
{
NS_PRECONDITION(aURI, "Must have a URI");
NS_PRECONDITION(aRequestingNode, "Must have a node");
nsCOMPtr<nsILoadGroup> loadGroup =
aRequestingNode->OwnerDoc()->GetDocumentLoadGroup();
nsresult rv = NS_OK;
nsCOMPtr<nsIChannel> channel;
rv = NS_NewChannel(getter_AddRefs(channel),
aURI,
aRequestingNode,
nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS,
nsIContentPolicy::TYPE_OTHER,
loadGroup);
NS_ENSURE_SUCCESS(rv, rv);
mURI = aURI;
return channel->AsyncOpen2(this);
}
NS_IMPL_ISUPPORTS(nsExternalResourceMap::LoadgroupCallbacks,
nsIInterfaceRequestor)
#define IMPL_SHIM(_i) \
NS_IMPL_ISUPPORTS(nsExternalResourceMap::LoadgroupCallbacks::_i##Shim, _i)
IMPL_SHIM(nsILoadContext)
IMPL_SHIM(nsIProgressEventSink)
IMPL_SHIM(nsIChannelEventSink)
IMPL_SHIM(nsISecurityEventSink)
IMPL_SHIM(nsIApplicationCacheContainer)
#undef IMPL_SHIM
#define IID_IS(_i) aIID.Equals(NS_GET_IID(_i))
#define TRY_SHIM(_i) \
PR_BEGIN_MACRO \
if (IID_IS(_i)) { \
nsCOMPtr<_i> real = do_GetInterface(mCallbacks); \
if (!real) { \
return NS_NOINTERFACE; \
} \
nsCOMPtr<_i> shim = new _i##Shim(this, real); \
shim.forget(aSink); \
return NS_OK; \
} \
PR_END_MACRO
NS_IMETHODIMP
nsExternalResourceMap::LoadgroupCallbacks::GetInterface(const nsIID & aIID,
void **aSink)
{
if (mCallbacks &&
(IID_IS(nsIPrompt) || IID_IS(nsIAuthPrompt) || IID_IS(nsIAuthPrompt2) ||
IID_IS(nsITabChild))) {
return mCallbacks->GetInterface(aIID, aSink);
}
*aSink = nullptr;
TRY_SHIM(nsILoadContext);
TRY_SHIM(nsIProgressEventSink);
TRY_SHIM(nsIChannelEventSink);
TRY_SHIM(nsISecurityEventSink);
TRY_SHIM(nsIApplicationCacheContainer);
return NS_NOINTERFACE;
}
#undef TRY_SHIM
#undef IID_IS
nsExternalResourceMap::ExternalResource::~ExternalResource()
{
if (mViewer) {
mViewer->Close(nullptr);
mViewer->Destroy();
}
}
// ==================================================================
// =
// ==================================================================
// If we ever have an nsIDocumentObserver notification for stylesheet title
// changes we should update the list from that instead of overriding
// EnsureFresh.
class nsDOMStyleSheetSetList final : public DOMStringList
{
public:
explicit nsDOMStyleSheetSetList(nsIDocument* aDocument);
void Disconnect()
{
mDocument = nullptr;
}
virtual void EnsureFresh() override;
protected:
nsIDocument* mDocument; // Our document; weak ref. It'll let us know if it
// dies.
};
nsDOMStyleSheetSetList::nsDOMStyleSheetSetList(nsIDocument* aDocument)
: mDocument(aDocument)
{
NS_ASSERTION(mDocument, "Must have document!");
}
void
nsDOMStyleSheetSetList::EnsureFresh()
{
MOZ_ASSERT(NS_IsMainThread());
mNames.Clear();
if (!mDocument) {
return; // Spec says "no exceptions", and we have no style sets if we have
// no document, for sure
}
int32_t count = mDocument->GetNumberOfStyleSheets();
nsAutoString title;
for (int32_t index = 0; index < count; index++) {
StyleSheet* sheet = mDocument->GetStyleSheetAt(index);
NS_ASSERTION(sheet, "Null sheet in sheet list!");
// XXXheycam ServoStyleSheets don't expose their title yet.
if (sheet->IsServo()) {
NS_ERROR("stylo: ServoStyleSets don't expose their title yet");
continue;
}
sheet->AsGecko()->GetTitle(title);
if (!title.IsEmpty() && !mNames.Contains(title) && !Add(title)) {
return;
}
}
}
// ==================================================================
nsIDocument::SelectorCache::SelectorCache()
: nsExpirationTracker<SelectorCacheKey, 4>(1000, "nsIDocument::SelectorCache")
{ }
// CacheList takes ownership of aSelectorList.
void nsIDocument::SelectorCache::CacheList(const nsAString& aSelector,
nsCSSSelectorList* aSelectorList)
{
SelectorCacheKey* key = new SelectorCacheKey(aSelector);
mTable.Put(key->mKey, aSelectorList);
AddObject(key);
}
class nsIDocument::SelectorCacheKeyDeleter final : public Runnable
{
public:
explicit SelectorCacheKeyDeleter(SelectorCacheKey* aToDelete)
: mSelector(aToDelete)
{
MOZ_COUNT_CTOR(SelectorCacheKeyDeleter);
}
protected:
~SelectorCacheKeyDeleter()
{
MOZ_COUNT_DTOR(SelectorCacheKeyDeleter);
}
public:
NS_IMETHOD Run() override
{
return NS_OK;
}
private:
nsAutoPtr<SelectorCacheKey> mSelector;
};
void nsIDocument::SelectorCache::NotifyExpired(SelectorCacheKey* aSelector)
{
RemoveObject(aSelector);
mTable.Remove(aSelector->mKey);
nsCOMPtr<nsIRunnable> runnable = new SelectorCacheKeyDeleter(aSelector);
NS_DispatchToCurrentThread(runnable);
}
struct nsIDocument::FrameRequest
{
FrameRequest(FrameRequestCallback& aCallback,
int32_t aHandle) :
mCallback(&aCallback),
mHandle(aHandle)
{}
// Conversion operator so that we can append these to a
// FrameRequestCallbackList
operator const RefPtr<FrameRequestCallback>& () const {
return mCallback;
}
// Comparator operators to allow RemoveElementSorted with an
// integer argument on arrays of FrameRequest
bool operator==(int32_t aHandle) const {
return mHandle == aHandle;
}
bool operator<(int32_t aHandle) const {
return mHandle < aHandle;
}
RefPtr<FrameRequestCallback> mCallback;
int32_t mHandle;
};
static already_AddRefed<mozilla::dom::NodeInfo> nullNodeInfo;
// ==================================================================
// =
// ==================================================================
nsIDocument::nsIDocument()
: nsINode(nullNodeInfo),
mReferrerPolicySet(false),
mReferrerPolicy(mozilla::net::RP_Default),
mBlockAllMixedContent(false),
mBlockAllMixedContentPreloads(false),
mUpgradeInsecureRequests(false),
mUpgradeInsecurePreloads(false),
mCharacterSet(NS_LITERAL_CSTRING("ISO-8859-1")),
mNodeInfoManager(nullptr),
mCompatMode(eCompatibility_FullStandards),
mVisibilityState(dom::VisibilityState::Hidden),
mIsInitialDocumentInWindow(false),
mMayStartLayout(true),
mVisible(true),
mRemovedFromDocShell(false),
// mAllowDNSPrefetch starts true, so that we can always reliably && it
// with various values that might disable it. Since we never prefetch
// unless we get a window, and in that case the docshell value will get
// &&-ed in, this is safe.
mAllowDNSPrefetch(true),
mIsBeingUsedAsImage(false),
mHasLinksToUpdate(false),
mFontFaceSetDirty(true),
mGetUserFontSetCalled(false),
mPostedFlushUserFontSet(false),
mPartID(0),
mDidFireDOMContentLoaded(true),
mHasScrollLinkedEffect(false),
mUserHasInteracted(false)
{
SetIsInDocument();
PR_INIT_CLIST(&mDOMMediaQueryLists);
}
// NOTE! nsDocument::operator new() zeroes out all members, so don't
// bother initializing members to 0.
nsDocument::nsDocument(const char* aContentType)
: nsIDocument()
, mAnimatingImages(true)
, mViewportType(Unknown)
{
SetContentTypeInternal(nsDependentCString(aContentType));
if (gDocumentLeakPRLog)
MOZ_LOG(gDocumentLeakPRLog, LogLevel::Debug,
("DOCUMENT %p created", this));
// Start out mLastStyleSheetSet as null, per spec
SetDOMStringToNull(mLastStyleSheetSet);
// void state used to differentiate an empty source from an unselected source
mPreloadPictureFoundSource.SetIsVoid(true);
mEverInForeground = false;
}
void
nsDocument::ClearAllBoxObjects()
{
if (mBoxObjectTable) {
for (auto iter = mBoxObjectTable->Iter(); !iter.Done(); iter.Next()) {
nsPIBoxObject* boxObject = iter.UserData();
if (boxObject) {
boxObject->Clear();
}
}
delete mBoxObjectTable;
mBoxObjectTable = nullptr;
}
}
nsIDocument::~nsIDocument()
{
MOZ_ASSERT(PR_CLIST_IS_EMPTY(&mDOMMediaQueryLists),
"must not have media query lists left");
if (mNodeInfoManager) {
mNodeInfoManager->DropDocumentReference();
}
UnlinkOriginalDocumentIfStatic();
}
bool
nsDocument::IsAboutPage()
{
nsCOMPtr<nsIPrincipal> principal = GetPrincipal();
nsCOMPtr<nsIURI> uri;
principal->GetURI(getter_AddRefs(uri));
bool isAboutScheme = true;
if (uri) {
uri->SchemeIs("about", &isAboutScheme);
}
return isAboutScheme;
}
nsDocument::~nsDocument()
{
if (gDocumentLeakPRLog)
MOZ_LOG(gDocumentLeakPRLog, LogLevel::Debug,
("DOCUMENT %p destroyed", this));
NS_ASSERTION(!mIsShowing, "Destroying a currently-showing document");
// Note: This assert is only non-fatal because mochitest-bc triggers
// it... as well as the preceding assert about !mIsShowing.
NS_ASSERTION(!mObservingAppThemeChanged,
"Document leaked to shutdown, then the observer service dropped "
"its ref to us so we were able to go away.");
if (IsTopLevelContentDocument()) {
//don't report for about: pages
if (!IsAboutPage()) {
// Record the page load
uint32_t pageLoaded = 1;
Accumulate(Telemetry::MIXED_CONTENT_UNBLOCK_COUNTER, pageLoaded);
// Record the mixed content status of the docshell in Telemetry
enum {
NO_MIXED_CONTENT = 0, // There is no Mixed Content on the page
MIXED_DISPLAY_CONTENT = 1, // The page attempted to load Mixed Display Content
MIXED_ACTIVE_CONTENT = 2, // The page attempted to load Mixed Active Content
MIXED_DISPLAY_AND_ACTIVE_CONTENT = 3 // The page attempted to load Mixed Display & Mixed Active Content
};
bool mixedActiveLoaded = GetHasMixedActiveContentLoaded();
bool mixedActiveBlocked = GetHasMixedActiveContentBlocked();
bool mixedDisplayLoaded = GetHasMixedDisplayContentLoaded();
bool mixedDisplayBlocked = GetHasMixedDisplayContentBlocked();
bool hasMixedDisplay = (mixedDisplayBlocked || mixedDisplayLoaded);
bool hasMixedActive = (mixedActiveBlocked || mixedActiveLoaded);
uint32_t mixedContentLevel = NO_MIXED_CONTENT;
if (hasMixedDisplay && hasMixedActive) {
mixedContentLevel = MIXED_DISPLAY_AND_ACTIVE_CONTENT;
} else if (hasMixedActive){
mixedContentLevel = MIXED_ACTIVE_CONTENT;
} else if (hasMixedDisplay) {
mixedContentLevel = MIXED_DISPLAY_CONTENT;
}
Accumulate(Telemetry::MIXED_CONTENT_PAGE_LOAD, mixedContentLevel);
// record mixed object subrequest telemetry
if (mHasMixedContentObjectSubrequest) {
/* mixed object subrequest loaded on page*/
Accumulate(Telemetry::MIXED_CONTENT_OBJECT_SUBREQUEST, 1);
} else {
/* no mixed object subrequests loaded on page*/
Accumulate(Telemetry::MIXED_CONTENT_OBJECT_SUBREQUEST, 0);
}
// record CSP telemetry on this document
if (mHasCSP) {
Accumulate(Telemetry::CSP_DOCUMENTS_COUNT, 1);
}
if (mHasUnsafeInlineCSP) {
Accumulate(Telemetry::CSP_UNSAFE_INLINE_DOCUMENTS_COUNT, 1);
}
if (mHasUnsafeEvalCSP) {
Accumulate(Telemetry::CSP_UNSAFE_EVAL_DOCUMENTS_COUNT, 1);
}
}
}
ReportUseCounters();
mInDestructor = true;
mInUnlinkOrDeletion = true;
mozilla::DropJSObjects(this);
// Clear mObservers to keep it in sync with the mutationobserver list
mObservers.Clear();
if (mStyleSheetSetList) {
mStyleSheetSetList->Disconnect();
}
if (mAnimationController) {
mAnimationController->Disconnect();
}
MOZ_ASSERT(mTimelines.isEmpty());
mParentDocument = nullptr;
// Kill the subdocument map, doing this will release its strong
// references, if any.
delete mSubDocuments;
mSubDocuments = nullptr;
// Destroy link map now so we don't waste time removing
// links one by one
DestroyElementMaps();
nsAutoScriptBlocker scriptBlocker;
for (uint32_t indx = mChildren.ChildCount(); indx-- != 0; ) {
mChildren.ChildAt(indx)->UnbindFromTree();
mChildren.RemoveChildAt(indx);
}
mFirstChild = nullptr;
mCachedRootElement = nullptr;
// Let the stylesheets know we're going away
for (StyleSheet* sheet : mStyleSheets) {
sheet->SetOwningDocument(nullptr);
}
if (mAttrStyleSheet) {
mAttrStyleSheet->SetOwningDocument(nullptr);
}
// We don't own the mOnDemandBuiltInUASheets, so we don't need to reset them.
if (mListenerManager) {
mListenerManager->Disconnect();
UnsetFlags(NODE_HAS_LISTENERMANAGER);
}
if (mScriptLoader) {
mScriptLoader->DropDocumentReference();
}
if (mCSSLoader) {
// Could be null here if Init() failed or if we have been unlinked.
mCSSLoader->DropDocumentReference();
}
if (mStyleImageLoader) {
mStyleImageLoader->DropDocumentReference();
}
delete mHeaderData;
ClearAllBoxObjects();
mPendingTitleChangeEvent.Revoke();
// We don't want to leave residual locks on images. Make sure we're in an
// unlocked state, and then clear the table.
SetImageLockingState(false);
mImageTracker.Clear();
mPlugins.Clear();
}
NS_INTERFACE_TABLE_HEAD(nsDocument)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE_BEGIN
NS_INTERFACE_TABLE_ENTRY_AMBIGUOUS(nsDocument, nsISupports, nsINode)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsINode)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDocument)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMDocument)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMNode)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMDocumentXBL)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIScriptObjectPrincipal)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMEventTarget)
NS_INTERFACE_TABLE_ENTRY(nsDocument, mozilla::dom::EventTarget)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsISupportsWeakReference)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIRadioGroupContainer)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIMutationObserver)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIApplicationCacheContainer)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIObserver)
NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMXPathEvaluator)
NS_INTERFACE_TABLE_END
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsDocument)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDocument)
NS_IMETHODIMP_(MozExternalRefCountType)
nsDocument::Release()
{
NS_PRECONDITION(0 != mRefCnt, "dup release");
NS_ASSERT_OWNINGTHREAD(nsDocument);
nsISupports* base = NS_CYCLE_COLLECTION_CLASSNAME(nsDocument)::Upcast(this);
bool shouldDelete = false;
nsrefcnt count = mRefCnt.decr(base, &shouldDelete);
NS_LOG_RELEASE(this, count, "nsDocument");
if (count == 0) {
if (mStackRefCnt && !mNeedsReleaseAfterStackRefCntRelease) {
mNeedsReleaseAfterStackRefCntRelease = true;
NS_ADDREF_THIS();
return mRefCnt.get();
}
mRefCnt.incr(base);
nsNodeUtils::LastRelease(this);
mRefCnt.decr(base);
if (shouldDelete) {
mRefCnt.stabilizeForDeletion();
DeleteCycleCollectable();
}
}
return count;
}
NS_IMETHODIMP_(void)
nsDocument::DeleteCycleCollectable()
{
delete this;
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDocument)
if (Element::CanSkip(tmp, aRemovingAllowed)) {
EventListenerManager* elm = tmp->GetExistingListenerManager();
if (elm) {
elm->MarkForCC();
}
return true;
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDocument)
return Element::CanSkipInCC(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDocument)
return Element::CanSkipThis(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
static const char* kNSURIs[] = {
"([none])",
"(xmlns)",
"(xml)",
"(xhtml)",
"(XLink)",
"(XSLT)",
"(XBL)",
"(MathML)",
"(RDF)",
"(XUL)"
};
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsDocument)
if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
char name[512];
nsAutoCString loadedAsData;
if (tmp->IsLoadedAsData()) {
loadedAsData.AssignLiteral("data");
} else {
loadedAsData.AssignLiteral("normal");
}
uint32_t nsid = tmp->GetDefaultNamespaceID();
nsAutoCString uri;
if (tmp->mDocumentURI)
uri = tmp->mDocumentURI->GetSpecOrDefault();
if (nsid < ArrayLength(kNSURIs)) {
SprintfLiteral(name, "nsDocument %s %s %s",
loadedAsData.get(), kNSURIs[nsid], uri.get());
}
else {
SprintfLiteral(name, "nsDocument %s %s",
loadedAsData.get(), uri.get());
}
cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
}
else {
NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsDocument, tmp->mRefCnt.get())
}
// Always need to traverse script objects, so do that before we check
// if we're uncollectable.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
if (!nsINode::Traverse(tmp, cb)) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
if (tmp->mMaybeEndOutermostXBLUpdateRunner) {
// The cached runnable keeps a reference to the document object..
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb,
"mMaybeEndOutermostXBLUpdateRunner.mObj");
cb.NoteXPCOMChild(ToSupports(tmp));
}
for (auto iter = tmp->mIdentifierMap.ConstIter(); !iter.Done();
iter.Next()) {
iter.Get()->Traverse(&cb);
}
tmp->mExternalResourceMap.Traverse(&cb);
// Traverse the mChildren nsAttrAndChildArray.
for (int32_t indx = int32_t(tmp->mChildren.ChildCount()); indx > 0; --indx) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mChildren[i]");
cb.NoteXPCOMChild(tmp->mChildren.ChildAt(indx - 1));
}
// Traverse all nsIDocument pointer members.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSecurityInfo)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDisplayDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFontFaceSet)
// Traverse all nsDocument nsCOMPtrs.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParser)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mScriptGlobalObject)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mListenerManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDOMStyleSheets)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStyleSheetSetList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mScriptLoader)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMasterDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mImportManager)
for (auto iter = tmp->mRadioGroups.Iter(); !iter.Done(); iter.Next()) {
nsRadioGroupStruct* radioGroup = iter.UserData();
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(
cb, "mRadioGroups entry->mSelectedRadioButton");
cb.NoteXPCOMChild(ToSupports(radioGroup->mSelectedRadioButton));
uint32_t i, count = radioGroup->mRadioButtons.Count();
for (i = 0; i < count; ++i) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(
cb, "mRadioGroups entry->mRadioButtons[i]");
cb.NoteXPCOMChild(radioGroup->mRadioButtons[i]);
}
}
// The boxobject for an element will only exist as long as it's in the
// document, so we'll traverse the table here instead of from the element.
if (tmp->mBoxObjectTable) {
for (auto iter = tmp->mBoxObjectTable->Iter(); !iter.Done(); iter.Next()) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mBoxObjectTable entry");
cb.NoteXPCOMChild(iter.UserData());
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChannel)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStyleAttrStyleSheet)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mXPathEvaluator)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLayoutHistoryState)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOnloadBlocker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFirstBaseNodeWithHref)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDOMImplementation)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mImageMaps)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOrientationPendingPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOriginalDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCachedEncoder)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStateObjectCached)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mUndoManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocumentTimeline)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingAnimationTracker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTemplateContentsOwner)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChildrenCollection)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnonymousContents)
// Traverse all our nsCOMArrays.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mStyleSheets)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOnDemandBuiltInUASheets)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPreloadingImages)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSubImportLinks)
for (uint32_t i = 0; i < tmp->mFrameRequestCallbacks.Length(); ++i) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mFrameRequestCallbacks[i]");
cb.NoteXPCOMChild(tmp->mFrameRequestCallbacks[i].mCallback);
}
// Traverse animation components
if (tmp->mAnimationController) {
tmp->mAnimationController->Traverse(&cb);
}
if (tmp->mSubDocuments) {
for (auto iter = tmp->mSubDocuments->Iter(); !iter.Done(); iter.Next()) {
auto entry = static_cast<SubDocMapEntry*>(iter.Get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb,
"mSubDocuments entry->mKey");
cb.NoteXPCOMChild(entry->mKey);
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb,
"mSubDocuments entry->mSubDocument");
cb.NoteXPCOMChild(entry->mSubDocument);
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCSSLoader)
// We own only the items in mDOMMediaQueryLists that have listeners;
// this reference is managed by their AddListener and RemoveListener
// methods.
for (PRCList *l = PR_LIST_HEAD(&tmp->mDOMMediaQueryLists);
l != &tmp->mDOMMediaQueryLists; l = PR_NEXT_LINK(l)) {
MediaQueryList *mql = static_cast<MediaQueryList*>(l);
if (mql->HasListeners()) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mDOMMediaQueryLists item");
cb.NoteXPCOMChild(mql);
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_CLASS(nsDocument)
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(nsDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDocument)
tmp->mInUnlinkOrDeletion = true;
// Clear out our external resources
tmp->mExternalResourceMap.Shutdown();
nsAutoScriptBlocker scriptBlocker;
nsINode::Unlink(tmp);
// Unlink the mChildren nsAttrAndChildArray.
for (int32_t indx = int32_t(tmp->mChildren.ChildCount()) - 1;
indx >= 0; --indx) {
tmp->mChildren.ChildAt(indx)->UnbindFromTree();
tmp->mChildren.RemoveChildAt(indx);
}
tmp->mFirstChild = nullptr;
tmp->UnlinkOriginalDocumentIfStatic();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mXPathEvaluator)
tmp->mCachedRootElement = nullptr; // Avoid a dangling pointer
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDisplayDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFirstBaseNodeWithHref)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMaybeEndOutermostXBLUpdateRunner)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDOMImplementation)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mImageMaps)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCachedEncoder)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mUndoManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocumentTimeline)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingAnimationTracker)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTemplateContentsOwner)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mChildrenCollection)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMasterDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mOrientationPendingPromise)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mImportManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSubImportLinks)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFontFaceSet)
tmp->mParentDocument = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPreloadingImages)
tmp->ClearAllBoxObjects();
if (tmp->mListenerManager) {
tmp->mListenerManager->Disconnect();
tmp->UnsetFlags(NODE_HAS_LISTENERMANAGER);
tmp->mListenerManager = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDOMStyleSheets)
if (tmp->mStyleSheetSetList) {
tmp->mStyleSheetSetList->Disconnect();
tmp->mStyleSheetSetList = nullptr;
}
delete tmp->mSubDocuments;
tmp->mSubDocuments = nullptr;
tmp->mFrameRequestCallbacks.Clear();
tmp->mRadioGroups.Clear();
// nsDocument has a pretty complex destructor, so we're going to
// assume that *most* cycles you actually want to break somewhere
// else, and not unlink an awful lot here.
tmp->mIdentifierMap.Clear();
tmp->mExpandoAndGeneration.OwnerUnlinked();
if (tmp->mAnimationController) {
tmp->mAnimationController->Unlink();
}
tmp->mPendingTitleChangeEvent.Revoke();
if (tmp->mCSSLoader) {
tmp->mCSSLoader->DropDocumentReference();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCSSLoader)
}
// We own only the items in mDOMMediaQueryLists that have listeners;
// this reference is managed by their AddListener and RemoveListener
// methods.
for (PRCList *l = PR_LIST_HEAD(&tmp->mDOMMediaQueryLists);
l != &tmp->mDOMMediaQueryLists; ) {
PRCList *next = PR_NEXT_LINK(l);
MediaQueryList *mql = static_cast<MediaQueryList*>(l);
mql->RemoveAllListeners();
l = next;
}
tmp->mInUnlinkOrDeletion = false;
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
nsresult
nsDocument::Init()
{
if (mCSSLoader || mStyleImageLoader || mNodeInfoManager || mScriptLoader) {
return NS_ERROR_ALREADY_INITIALIZED;
}
// Force initialization.
nsINode::nsSlots* slots = Slots();
// Prepend self as mutation-observer whether we need it or not (some
// subclasses currently do, other don't). This is because the code in
// nsNodeUtils always notifies the first observer first, expecting the
// first observer to be the document.
NS_ENSURE_TRUE(slots->mMutationObservers.PrependElementUnlessExists(static_cast<nsIMutationObserver*>(this)),
NS_ERROR_OUT_OF_MEMORY);
mOnloadBlocker = new nsOnloadBlocker();
mCSSLoader = new mozilla::css::Loader(this);
// Assume we're not quirky, until we know otherwise
mCSSLoader->SetCompatibilityMode(eCompatibility_FullStandards);
mStyleImageLoader = new mozilla::css::ImageLoader(this);
mNodeInfoManager = new nsNodeInfoManager();
nsresult rv = mNodeInfoManager->Init(this);
NS_ENSURE_SUCCESS(rv, rv);
// mNodeInfo keeps NodeInfoManager alive!
mNodeInfo = mNodeInfoManager->GetDocumentNodeInfo();
NS_ENSURE_TRUE(mNodeInfo, NS_ERROR_OUT_OF_MEMORY);
MOZ_ASSERT(mNodeInfo->NodeType() == nsIDOMNode::DOCUMENT_NODE,
"Bad NodeType in aNodeInfo");
NS_ASSERTION(OwnerDoc() == this, "Our nodeinfo is busted!");
// If after creation the owner js global is not set for a document
// we use the default compartment for this document, instead of creating
// wrapper in some random compartment when the document is exposed to js
// via some events.
nsCOMPtr<nsIGlobalObject> global = xpc::NativeGlobal(xpc::PrivilegedJunkScope());
NS_ENSURE_TRUE(global, NS_ERROR_FAILURE);
mScopeObject = do_GetWeakReference(global);
MOZ_ASSERT(mScopeObject);
mScriptLoader = new nsScriptLoader(this);
mozilla::HoldJSObjects(this);
return NS_OK;
}
void
nsIDocument::DeleteAllProperties()
{
for (uint32_t i = 0; i < GetPropertyTableCount(); ++i) {
PropertyTable(i)->DeleteAllProperties();
}
}
void
nsIDocument::DeleteAllPropertiesFor(nsINode* aNode)
{
for (uint32_t i = 0; i < GetPropertyTableCount(); ++i) {
PropertyTable(i)->DeleteAllPropertiesFor(aNode);
}
}
nsPropertyTable*
nsIDocument::GetExtraPropertyTable(uint16_t aCategory)
{
NS_ASSERTION(aCategory > 0, "Category 0 should have already been handled");
while (aCategory >= mExtraPropertyTables.Length() + 1) {
mExtraPropertyTables.AppendElement(new nsPropertyTable());
}
return mExtraPropertyTables[aCategory - 1];
}
bool
nsIDocument::IsVisibleConsideringAncestors() const
{
const nsIDocument *parent = this;
do {
if (!parent->IsVisible()) {
return false;
}
} while ((parent = parent->GetParentDocument()));
return true;
}
void
nsDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
{
nsCOMPtr<nsIURI> uri;
nsCOMPtr<nsIPrincipal> principal;
if (aChannel) {
// Note: this code is duplicated in XULDocument::StartDocumentLoad and
// nsScriptSecurityManager::GetChannelResultPrincipal.
// Note: this should match nsDocShell::OnLoadingSite
NS_GetFinalChannelURI(aChannel, getter_AddRefs(uri));
nsIScriptSecurityManager *securityManager =
nsContentUtils::GetSecurityManager();
if (securityManager) {
securityManager->GetChannelResultPrincipal(aChannel,
getter_AddRefs(principal));
}
}
ResetToURI(uri, aLoadGroup, principal);
// Note that, since mTiming does not change during a reset, the
// navigationStart time remains unchanged and therefore any future new
// timeline will have the same global clock time as the old one.
mDocumentTimeline = nullptr;
nsCOMPtr<nsIPropertyBag2> bag = do_QueryInterface(aChannel);
if (bag) {
nsCOMPtr<nsIURI> baseURI;
bag->GetPropertyAsInterface(NS_LITERAL_STRING("baseURI"),
NS_GET_IID(nsIURI), getter_AddRefs(baseURI));
if (baseURI) {
mDocumentBaseURI = baseURI;
mChromeXHRDocBaseURI = nullptr;
}
}
mChannel = aChannel;
}
void
nsDocument::ResetToURI(nsIURI *aURI, nsILoadGroup *aLoadGroup,
nsIPrincipal* aPrincipal)
{
NS_PRECONDITION(aURI, "Null URI passed to ResetToURI");
if (gDocumentLeakPRLog && MOZ_LOG_TEST(gDocumentLeakPRLog, LogLevel::Debug)) {
PR_LogPrint("DOCUMENT %p ResetToURI %s", this,
aURI->GetSpecOrDefault().get());
}
mSecurityInfo = nullptr;
mDocumentLoadGroup = nullptr;
// Delete references to sub-documents and kill the subdocument map,
// if any. It holds strong references
delete mSubDocuments;
mSubDocuments = nullptr;
// Destroy link map now so we don't waste time removing
// links one by one
DestroyElementMaps();
bool oldVal = mInUnlinkOrDeletion;
mInUnlinkOrDeletion = true;
uint32_t count = mChildren.ChildCount();
{ // Scope for update
MOZ_AUTO_DOC_UPDATE(this, UPDATE_CONTENT_MODEL, true);
for (int32_t i = int32_t(count) - 1; i >= 0; i--) {
nsCOMPtr<nsIContent> content = mChildren.ChildAt(i);
nsIContent* previousSibling = content->GetPreviousSibling();
if (nsINode::GetFirstChild() == content) {
mFirstChild = content->GetNextSibling();
}
mChildren.RemoveChildAt(i);
nsNodeUtils::ContentRemoved(this, content, i, previousSibling);
content->UnbindFromTree();
}
mCachedRootElement = nullptr;
}
mInUnlinkOrDeletion = oldVal;
// Reset our stylesheets
ResetStylesheetsToURI(aURI);
// Release the listener manager
if (mListenerManager) {
mListenerManager->Disconnect();
mListenerManager = nullptr;
}
// Release the stylesheets list.
mDOMStyleSheets = nullptr;
// Release our principal after tearing down the document, rather than before.
// This ensures that, during teardown, the document and the dying window (which
// already nulled out its document pointer and cached the principal) have
// matching principals.
SetPrincipal(nullptr);
// Clear the original URI so SetDocumentURI sets it.
mOriginalURI = nullptr;
SetDocumentURI(aURI);
mChromeXHRDocURI = nullptr;
// If mDocumentBaseURI is null, nsIDocument::GetBaseURI() returns
// mDocumentURI.
mDocumentBaseURI = nullptr;
mChromeXHRDocBaseURI = nullptr;
if (aLoadGroup) {
mDocumentLoadGroup = do_GetWeakReference(aLoadGroup);
// there was an assertion here that aLoadGroup was not null. This
// is no longer valid: nsDocShell::SetDocument does not create a
// load group, and it works just fine
// XXXbz what does "just fine" mean exactly? And given that there
// is no nsDocShell::SetDocument, what is this talking about?
}
mLastModified.Truncate();
// XXXbz I guess we're assuming that the caller will either pass in
// a channel with a useful type or call SetContentType?
SetContentTypeInternal(EmptyCString());
mContentLanguage.Truncate();
mBaseTarget.Truncate();
mReferrer.Truncate();
mXMLDeclarationBits = 0;
// Now get our new principal
if (aPrincipal) {
SetPrincipal(aPrincipal);
} else {
nsIScriptSecurityManager *securityManager =
nsContentUtils::GetSecurityManager();
if (securityManager) {
nsCOMPtr<nsILoadContext> loadContext(mDocumentContainer);
if (!loadContext && aLoadGroup) {
nsCOMPtr<nsIInterfaceRequestor> cbs;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(cbs));
loadContext = do_GetInterface(cbs);
}
MOZ_ASSERT(loadContext,
"must have a load context or pass in an explicit principal");
nsCOMPtr<nsIPrincipal> principal;
nsresult rv = securityManager->
GetLoadContextCodebasePrincipal(mDocumentURI, loadContext,
getter_AddRefs(principal));
if (NS_SUCCEEDED(rv)) {
SetPrincipal(principal);
}
}
}
// Refresh the principal on the compartment.
if (nsPIDOMWindowInner* win = GetInnerWindow()) {
nsGlobalWindow::Cast(win)->RefreshCompartmentPrincipal();
}
}
void
nsDocument::RemoveDocStyleSheetsFromStyleSets()
{
// The stylesheets should forget us
for (StyleSheet* sheet : Reversed(mStyleSheets)) {
sheet->SetOwningDocument(nullptr);
if (sheet->IsApplicable()) {
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
shell->StyleSet()->RemoveDocStyleSheet(sheet);
}
}
// XXX Tell observers?
}
}
void
nsDocument::RemoveStyleSheetsFromStyleSets(
const nsTArray<RefPtr<StyleSheet>>& aSheets,
SheetType aType)
{
// The stylesheets should forget us
for (StyleSheet* sheet : Reversed(aSheets)) {
sheet->SetOwningDocument(nullptr);
if (sheet->IsApplicable()) {
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
shell->StyleSet()->RemoveStyleSheet(aType, sheet);
}
}
// XXX Tell observers?
}
}
void
nsDocument::ResetStylesheetsToURI(nsIURI* aURI)
{
MOZ_ASSERT(aURI);
mozAutoDocUpdate upd(this, UPDATE_STYLE, true);
if (mStyleSetFilled) {
// Skip removing style sheets from the style set if we know we haven't
// filled the style set. (This allows us to avoid calling
// GetStyleBackendType() too early.)
RemoveDocStyleSheetsFromStyleSets();
RemoveStyleSheetsFromStyleSets(mOnDemandBuiltInUASheets, SheetType::Agent);
RemoveStyleSheetsFromStyleSets(mAdditionalSheets[eAgentSheet], SheetType::Agent);
RemoveStyleSheetsFromStyleSets(mAdditionalSheets[eUserSheet], SheetType::User);
RemoveStyleSheetsFromStyleSets(mAdditionalSheets[eAuthorSheet], SheetType::Doc);
if (GetStyleBackendType() == StyleBackendType::Gecko) {
nsStyleSheetService *sheetService = nsStyleSheetService::GetInstance();
if (sheetService) {
RemoveStyleSheetsFromStyleSets(*sheetService->AuthorStyleSheets(), SheetType::Doc);
}
} else {
NS_ERROR("stylo: nsStyleSheetService doesn't handle ServoStyleSheets yet");
}
mStyleSetFilled = false;
}
// Release all the sheets
mStyleSheets.Clear();
mOnDemandBuiltInUASheets.Clear();
for (auto& sheets : mAdditionalSheets) {
sheets.Clear();
}
// NOTE: We don't release the catalog sheets. It doesn't really matter
// now, but it could in the future -- in which case not releasing them
// is probably the right thing to do.
// Now reset our inline style and attribute sheets.
if (mAttrStyleSheet) {
mAttrStyleSheet->Reset();
mAttrStyleSheet->SetOwningDocument(this);
} else {
mAttrStyleSheet = new nsHTMLStyleSheet(this);
}
if (!mStyleAttrStyleSheet) {
mStyleAttrStyleSheet = new nsHTMLCSSStyleSheet();
}
if (!mSVGAttrAnimationRuleProcessor) {
mSVGAttrAnimationRuleProcessor =
new mozilla::SVGAttrAnimationRuleProcessor();
}
// Now set up our style sets
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
FillStyleSet(shell->StyleSet());
}
}
static void
AppendSheetsToStyleSet(StyleSetHandle aStyleSet,
const nsTArray<RefPtr<StyleSheet>>& aSheets,
SheetType aType)
{
for (StyleSheet* sheet : Reversed(aSheets)) {
aStyleSet->AppendStyleSheet(aType, sheet);
}
}
void
nsDocument::FillStyleSet(StyleSetHandle aStyleSet)
{
NS_PRECONDITION(aStyleSet, "Must have a style set");
NS_PRECONDITION(aStyleSet->SheetCount(SheetType::Doc) == 0,
"Style set already has document sheets?");
MOZ_ASSERT(!mStyleSetFilled);
for (StyleSheet* sheet : Reversed(mStyleSheets)) {
if (sheet->IsApplicable()) {
aStyleSet->AddDocStyleSheet(sheet, this);
}
}
if (aStyleSet->IsGecko()) {
nsStyleSheetService *sheetService = nsStyleSheetService::GetInstance();
if (sheetService) {
for (StyleSheet* sheet : *sheetService->AuthorStyleSheets()) {
aStyleSet->AppendStyleSheet(SheetType::Doc, sheet);
}
}
// Iterate backwards to maintain order
for (StyleSheet* sheet : Reversed(mOnDemandBuiltInUASheets)) {
if (sheet->IsApplicable()) {
aStyleSet->PrependStyleSheet(SheetType::Agent, sheet);
}
}
} else {
NS_WARNING("stylo: Not yet checking nsStyleSheetService for Servo-backed "
"documents. See bug 1290224");
}
AppendSheetsToStyleSet(aStyleSet, mAdditionalSheets[eAgentSheet],
SheetType::Agent);
AppendSheetsToStyleSet(aStyleSet, mAdditionalSheets[eUserSheet],
SheetType::User);
AppendSheetsToStyleSet(aStyleSet, mAdditionalSheets[eAuthorSheet],
SheetType::Doc);
mStyleSetFilled = true;
}
static void
WarnIfSandboxIneffective(nsIDocShell* aDocShell,
uint32_t aSandboxFlags,
nsIChannel* aChannel)
{
// If the document is sandboxed (via the HTML5 iframe sandbox
// attribute) and both the allow-scripts and allow-same-origin
// keywords are supplied, the sandboxed document can call into its
// parent document and remove its sandboxing entirely - we print a
// warning to the web console in this case.
if (aSandboxFlags & SANDBOXED_NAVIGATION &&
!(aSandboxFlags & SANDBOXED_SCRIPTS) &&
!(aSandboxFlags & SANDBOXED_ORIGIN)) {
nsCOMPtr<nsIDocShellTreeItem> parentAsItem;
aDocShell->GetSameTypeParent(getter_AddRefs(parentAsItem));
nsCOMPtr<nsIDocShell> parentDocShell = do_QueryInterface(parentAsItem);
if (!parentDocShell) {
return;
}
// Don't warn if our parent is not the top-level document.
nsCOMPtr<nsIDocShellTreeItem> grandParentAsItem;
parentDocShell->GetSameTypeParent(getter_AddRefs(grandParentAsItem));
if (grandParentAsItem) {
return;
}
nsCOMPtr<nsIChannel> parentChannel;
parentDocShell->GetCurrentDocumentChannel(getter_AddRefs(parentChannel));
if (!parentChannel) {
return;
}
nsresult rv = nsContentUtils::CheckSameOrigin(aChannel, parentChannel);
if (NS_FAILED(rv)) {
return;
}
nsCOMPtr<nsIDocument> parentDocument = parentDocShell->GetDocument();
nsCOMPtr<nsIURI> iframeUri;
parentChannel->GetURI(getter_AddRefs(iframeUri));
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("Iframe Sandbox"),
parentDocument,
nsContentUtils::eSECURITY_PROPERTIES,
"BothAllowScriptsAndSameOriginPresent",
nullptr, 0, iframeUri);
}
}
nsresult
nsDocument::StartDocumentLoad(const char* aCommand, nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
nsISupports* aContainer,
nsIStreamListener **aDocListener,
bool aReset, nsIContentSink* aSink)
{
if (gDocumentLeakPRLog && MOZ_LOG_TEST(gDocumentLeakPRLog, LogLevel::Debug)) {
nsCOMPtr<nsIURI> uri;
aChannel->GetURI(getter_AddRefs(uri));
PR_LogPrint("DOCUMENT %p StartDocumentLoad %s",
this, uri ? uri->GetSpecOrDefault().get() : "");
}
MOZ_ASSERT(NodePrincipal()->GetAppId() != nsIScriptSecurityManager::UNKNOWN_APP_ID,
"Document should never have UNKNOWN_APP_ID");
MOZ_ASSERT(GetReadyStateEnum() == nsIDocument::READYSTATE_UNINITIALIZED,
"Bad readyState");
SetReadyStateInternal(READYSTATE_LOADING);
if (nsCRT::strcmp(kLoadAsData, aCommand) == 0) {
mLoadedAsData = true;
// We need to disable script & style loading in this case.
// We leave them disabled even in EndLoad(), and let anyone
// who puts the document on display to worry about enabling.
// Do not load/process scripts when loading as data
ScriptLoader()->SetEnabled(false);
// styles
CSSLoader()->SetEnabled(false); // Do not load/process styles when loading as data
} else if (nsCRT::strcmp("external-resource", aCommand) == 0) {
// Allow CSS, but not scripts
ScriptLoader()->SetEnabled(false);
}
mMayStartLayout = false;
if (aReset) {
Reset(aChannel, aLoadGroup);
}
nsAutoCString contentType;
nsCOMPtr<nsIPropertyBag2> bag = do_QueryInterface(aChannel);
if ((bag && NS_SUCCEEDED(bag->GetPropertyAsACString(
NS_LITERAL_STRING("contentType"), contentType))) ||
NS_SUCCEEDED(aChannel->GetContentType(contentType))) {
// XXX this is only necessary for viewsource:
nsACString::const_iterator start, end, semicolon;
contentType.BeginReading(start);
contentType.EndReading(end);
semicolon = start;
FindCharInReadable(';', semicolon, end);
SetContentTypeInternal(Substring(start, semicolon));
}
RetrieveRelevantHeaders(aChannel);
mChannel = aChannel;
nsCOMPtr<nsIInputStreamChannel> inStrmChan = do_QueryInterface(mChannel);
if (inStrmChan) {
bool isSrcdocChannel;
inStrmChan->GetIsSrcdocChannel(&isSrcdocChannel);
if (isSrcdocChannel) {
mIsSrcdocDocument = true;
}
}
// If this document is being loaded by a docshell, copy its sandbox flags
// to the document, and store the fullscreen enabled flag. These are
// immutable after being set here.
nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(aContainer);
// If this is an error page, don't inherit sandbox flags from docshell
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
if (docShell && !(loadInfo && loadInfo->GetLoadErrorPage())) {
nsresult rv = docShell->GetSandboxFlags(&mSandboxFlags);
NS_ENSURE_SUCCESS(rv, rv);
WarnIfSandboxIneffective(docShell, mSandboxFlags, GetChannel());
}
// The CSP directive upgrade-insecure-requests not only applies to the
// toplevel document, but also to nested documents. Let's propagate that
// flag from the parent to the nested document.
nsCOMPtr<nsIDocShellTreeItem> treeItem = this->GetDocShell();
if (treeItem) {
nsCOMPtr<nsIDocShellTreeItem> sameTypeParent;
treeItem->GetSameTypeParent(getter_AddRefs(sameTypeParent));
if (sameTypeParent) {
nsIDocument* doc = sameTypeParent->GetDocument();
mBlockAllMixedContent = doc->GetBlockAllMixedContent(false);
// if the parent document makes use of block-all-mixed-content
// then subdocument preloads should always be blocked.
mBlockAllMixedContentPreloads =
mBlockAllMixedContent || doc->GetBlockAllMixedContent(true);
mUpgradeInsecureRequests = doc->GetUpgradeInsecureRequests(false);
// if the parent document makes use of upgrade-insecure-requests
// then subdocument preloads should always be upgraded.
mUpgradeInsecurePreloads =
mUpgradeInsecureRequests || doc->GetUpgradeInsecureRequests(true);
}
}
// If this is not a data document, set CSP.
if (!mLoadedAsData) {
nsresult rv = InitCSP(aChannel);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
nsDocument::SendToConsole(nsCOMArray<nsISecurityConsoleMessage>& aMessages)
{
for (uint32_t i = 0; i < aMessages.Length(); ++i) {
nsAutoString messageTag;
aMessages[i]->GetTag(messageTag);
nsAutoString category;
aMessages[i]->GetCategory(category);
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_ConvertUTF16toUTF8(category),
this, nsContentUtils::eSECURITY_PROPERTIES,
NS_ConvertUTF16toUTF8(messageTag).get());
}
}
void
nsDocument::ApplySettingsFromCSP(bool aSpeculative)
{
nsresult rv = NS_OK;
if (!aSpeculative) {
// 1) apply settings from regular CSP
nsCOMPtr<nsIContentSecurityPolicy> csp;
rv = NodePrincipal()->GetCsp(getter_AddRefs(csp));
NS_ENSURE_SUCCESS_VOID(rv);
if (csp) {
// Set up any Referrer Policy specified by CSP
bool hasReferrerPolicy = false;
uint32_t referrerPolicy = mozilla::net::RP_Default;
rv = csp->GetReferrerPolicy(&referrerPolicy, &hasReferrerPolicy);
NS_ENSURE_SUCCESS_VOID(rv);
if (hasReferrerPolicy) {
mReferrerPolicy = static_cast<ReferrerPolicy>(referrerPolicy);
mReferrerPolicySet = true;
}
// Set up 'block-all-mixed-content' if not already inherited
// from the parent context or set by any other CSP.
if (!mBlockAllMixedContent) {
rv = csp->GetBlockAllMixedContent(&mBlockAllMixedContent);
NS_ENSURE_SUCCESS_VOID(rv);
}
if (!mBlockAllMixedContentPreloads) {
mBlockAllMixedContentPreloads = mBlockAllMixedContent;
}
// Set up 'upgrade-insecure-requests' if not already inherited
// from the parent context or set by any other CSP.
if (!mUpgradeInsecureRequests) {
rv = csp->GetUpgradeInsecureRequests(&mUpgradeInsecureRequests);
NS_ENSURE_SUCCESS_VOID(rv);
}
if (!mUpgradeInsecurePreloads) {
mUpgradeInsecurePreloads = mUpgradeInsecureRequests;
}
}
return;
}
// 2) apply settings from speculative csp
nsCOMPtr<nsIContentSecurityPolicy> preloadCsp;
rv = NodePrincipal()->GetPreloadCsp(getter_AddRefs(preloadCsp));
NS_ENSURE_SUCCESS_VOID(rv);
if (preloadCsp) {
if (!mBlockAllMixedContentPreloads) {
rv = preloadCsp->GetBlockAllMixedContent(&mBlockAllMixedContentPreloads);
NS_ENSURE_SUCCESS_VOID(rv);
}
if (!mUpgradeInsecurePreloads) {
rv = preloadCsp->GetUpgradeInsecureRequests(&mUpgradeInsecurePreloads);
NS_ENSURE_SUCCESS_VOID(rv);
}
}
}
nsresult
nsDocument::InitCSP(nsIChannel* aChannel)
{
MOZ_ASSERT(!mScriptGlobalObject,
"CSP must be initialized before mScriptGlobalObject is set!");
if (!CSPService::sCSPEnabled) {
MOZ_LOG(gCspPRLog, LogLevel::Debug,
("CSP is disabled, skipping CSP init for document %p", this));
return NS_OK;
}
nsAutoCString tCspHeaderValue, tCspROHeaderValue;
nsCOMPtr<nsIHttpChannel> httpChannel;
nsresult rv = GetHttpChannelHelper(aChannel, getter_AddRefs(httpChannel));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (httpChannel) {
httpChannel->GetResponseHeader(
NS_LITERAL_CSTRING("content-security-policy"),
tCspHeaderValue);
httpChannel->GetResponseHeader(
NS_LITERAL_CSTRING("content-security-policy-report-only"),
tCspROHeaderValue);
}
NS_ConvertASCIItoUTF16 cspHeaderValue(tCspHeaderValue);
NS_ConvertASCIItoUTF16 cspROHeaderValue(tCspROHeaderValue);
// Figure out if we need to apply an app default CSP or a CSP from an app manifest
nsCOMPtr<nsIPrincipal> principal = NodePrincipal();
uint16_t appStatus = principal->GetAppStatus();
bool applyAppDefaultCSP = false;
bool applyAppManifestCSP = false;
nsAutoString appManifestCSP;
nsAutoString appDefaultCSP;
if (appStatus != nsIPrincipal::APP_STATUS_NOT_INSTALLED) {
nsCOMPtr<nsIAppsService> appsService = do_GetService(APPS_SERVICE_CONTRACTID);
if (appsService) {
uint32_t appId = principal->GetAppId();
appsService->GetManifestCSPByLocalId(appId, appManifestCSP);
if (!appManifestCSP.IsEmpty()) {
applyAppManifestCSP = true;
}
appsService->GetDefaultCSPByLocalId(appId, appDefaultCSP);
if (!appDefaultCSP.IsEmpty()) {
applyAppDefaultCSP = true;
}
}
}
// Check if this is a document from a WebExtension.
nsString addonId;
principal->GetAddonId(addonId);
bool applyAddonCSP = !addonId.IsEmpty();
// Check if this is a signed content to apply default CSP.
bool applySignedContentCSP = false;
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo();
if (loadInfo && loadInfo->GetVerifySignedContent()) {
applySignedContentCSP = true;
}
// If there's no CSP to apply, go ahead and return early
if (!applyAppDefaultCSP &&
!applyAppManifestCSP &&
!applyAddonCSP &&
!applySignedContentCSP &&
cspHeaderValue.IsEmpty() &&
cspROHeaderValue.IsEmpty()) {
if (MOZ_LOG_TEST(gCspPRLog, LogLevel::Debug)) {
nsCOMPtr<nsIURI> chanURI;
aChannel->GetURI(getter_AddRefs(chanURI));
nsAutoCString aspec;
chanURI->GetAsciiSpec(aspec);
MOZ_LOG(gCspPRLog, LogLevel::Debug,
("no CSP for document, %s, %s",
aspec.get(),
applyAppDefaultCSP ? "is app" : "not an app"));
}
return NS_OK;
}
MOZ_LOG(gCspPRLog, LogLevel::Debug, ("Document is an app or CSP header specified %p", this));
// If Document is an app check to see if we already set CSP and return early
// if that is indeed the case.
//
// In general (see bug 947831), we should not be setting CSP on a principal
// that aliases another document. For non-app code this is not a problem
// since we only share the underlying principal with nested browsing
// contexts for which a header cannot be set (e.g., about:blank and
// about:srcodoc iframes) and thus won't try to set the CSP again. This
// check ensures that we do not try to set CSP for an app.
if (applyAppDefaultCSP || applyAppManifestCSP) {
nsCOMPtr<nsIContentSecurityPolicy> csp;
rv = principal->GetCsp(getter_AddRefs(csp));
NS_ENSURE_SUCCESS(rv, rv);
if (csp) {
MOZ_LOG(gCspPRLog, LogLevel::Debug, ("%s %s %s",
"This document is sharing principal with another document.",
"Since the document is an app, CSP was already set.",
"Skipping attempt to set CSP."));
return NS_OK;
}
}
nsCOMPtr<nsIContentSecurityPolicy> csp;
rv = principal->EnsureCSP(this, getter_AddRefs(csp));
NS_ENSURE_SUCCESS(rv, rv);
// ----- if the doc is an app and we want a default CSP, apply it.
if (applyAppDefaultCSP) {
csp->AppendPolicy(appDefaultCSP, false, false);
}
// ----- if the doc is an app and specifies a CSP in its manifest, apply it.
if (applyAppManifestCSP) {
csp->AppendPolicy(appManifestCSP, false, false);
}
// ----- if the doc is an addon, apply its CSP.
if (applyAddonCSP) {
nsCOMPtr<nsIAddonPolicyService> aps = do_GetService("@mozilla.org/addons/policy-service;1");
nsAutoString addonCSP;
rv = aps->GetBaseCSP(addonCSP);
if (NS_SUCCEEDED(rv)) {
csp->AppendPolicy(addonCSP, false, false);
}
rv = aps->GetAddonCSP(addonId, addonCSP);
if (NS_SUCCEEDED(rv)) {
csp->AppendPolicy(addonCSP, false, false);
}
}
// ----- if the doc is a signed content, apply the default CSP.
// Note that when the content signing becomes a standard, we might have
// to restrict this enforcement to "remote content" only.
if (applySignedContentCSP) {
nsAdoptingString signedContentCSP =
Preferences::GetString("security.signed_content.CSP.default");
csp->AppendPolicy(signedContentCSP, false, false);
}
// ----- if there's a full-strength CSP header, apply it.
if (!cspHeaderValue.IsEmpty()) {
rv = CSP_AppendCSPFromHeader(csp, cspHeaderValue, false);
NS_ENSURE_SUCCESS(rv, rv);
}
// ----- if there's a report-only CSP header, apply it.
if (!cspROHeaderValue.IsEmpty()) {
rv = CSP_AppendCSPFromHeader(csp, cspROHeaderValue, true);
NS_ENSURE_SUCCESS(rv, rv);
}
// ----- Enforce sandbox policy if supplied in CSP header
// The document may already have some sandbox flags set (e.g. if the document
// is an iframe with the sandbox attribute set). If we have a CSP sandbox
// directive, intersect the CSP sandbox flags with the existing flags. This
// corresponds to the _least_ permissive policy.
uint32_t cspSandboxFlags = SANDBOXED_NONE;
rv = csp->GetCSPSandboxFlags(&cspSandboxFlags);
NS_ENSURE_SUCCESS(rv, rv);
mSandboxFlags |= cspSandboxFlags;
if (cspSandboxFlags & SANDBOXED_ORIGIN) {
// If the new CSP sandbox flags do not have the allow-same-origin flag
// reset the document principal to a null principal
principal = do_CreateInstance("@mozilla.org/nullprincipal;1");
SetPrincipal(principal);
}
// ----- Enforce frame-ancestor policy on any applied policies
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
if (docShell) {
bool safeAncestry = false;
// PermitsAncestry sends violation reports when necessary
rv = csp->PermitsAncestry(docShell, &safeAncestry);
if (NS_FAILED(rv) || !safeAncestry) {
MOZ_LOG(gCspPRLog, LogLevel::Debug,
("CSP doesn't like frame's ancestry, not loading."));
// stop! ERROR page!
aChannel->Cancel(NS_ERROR_CSP_FRAME_ANCESTOR_VIOLATION);
}
}
ApplySettingsFromCSP(false);
return NS_OK;
}
void
nsDocument::StopDocumentLoad()
{
if (mParser) {
mParserAborted = true;
mParser->Terminate();
}
}
void
nsDocument::SetDocumentURI(nsIURI* aURI)
{
nsCOMPtr<nsIURI> oldBase = GetDocBaseURI();
mDocumentURI = NS_TryToMakeImmutable(aURI);
nsIURI* newBase = GetDocBaseURI();
bool equalBases = false;
// Changing just the ref of a URI does not change how relative URIs would
// resolve wrt to it, so we can treat the bases as equal as long as they're
// equal ignoring the ref.
if (oldBase && newBase) {
oldBase->EqualsExceptRef(newBase, &equalBases);
}
else {
equalBases = !oldBase && !newBase;
}
// If this is the first time we're setting the document's URI, set the
// document's original URI.
if (!mOriginalURI)
mOriginalURI = mDocumentURI;
// If changing the document's URI changed the base URI of the document, we
// need to refresh the hrefs of all the links on the page.
if (!equalBases) {
RefreshLinkHrefs();
}
}
void
nsDocument::SetChromeXHRDocURI(nsIURI* aURI)
{
mChromeXHRDocURI = aURI;
}
void
nsDocument::SetChromeXHRDocBaseURI(nsIURI* aURI)
{
mChromeXHRDocBaseURI = aURI;
}
NS_IMETHODIMP
nsDocument::GetLastModified(nsAString& aLastModified)
{
nsIDocument::GetLastModified(aLastModified);
return NS_OK;
}
static void
GetFormattedTimeString(PRTime aTime, nsAString& aFormattedTimeString)
{
PRExplodedTime prtime;
PR_ExplodeTime(aTime, PR_LocalTimeParameters, &prtime);
// "MM/DD/YYYY hh:mm:ss"
char formatedTime[24];
if (SprintfLiteral(formatedTime, "%02d/%02d/%04d %02d:%02d:%02d",
prtime.tm_month + 1, prtime.tm_mday, int(prtime.tm_year),
prtime.tm_hour , prtime.tm_min, prtime.tm_sec)) {
CopyASCIItoUTF16(nsDependentCString(formatedTime), aFormattedTimeString);
} else {
// If we for whatever reason failed to find the last modified time
// (or even the current time), fall back to what NS4.x returned.
aFormattedTimeString.AssignLiteral(u"01/01/1970 00:00:00");
}
}
void
nsIDocument::GetLastModified(nsAString& aLastModified) const
{
if (!mLastModified.IsEmpty()) {
aLastModified.Assign(mLastModified);
} else {
GetFormattedTimeString(PR_Now(), aLastModified);
}
}
void
nsDocument::AddToNameTable(Element *aElement, nsIAtom* aName)
{
MOZ_ASSERT(nsGenericHTMLElement::ShouldExposeNameAsHTMLDocumentProperty(aElement),
"Only put elements that need to be exposed as document['name'] in "
"the named table.");
nsIdentifierMapEntry *entry =
mIdentifierMap.PutEntry(nsDependentAtomString(aName));
// Null for out-of-memory
if (entry) {
if (!entry->HasNameElement() &&
!entry->HasIdElementExposedAsHTMLDocumentProperty()) {
++mExpandoAndGeneration.generation;
}
entry->AddNameElement(this, aElement);
}
}
void
nsDocument::RemoveFromNameTable(Element *aElement, nsIAtom* aName)
{
// Speed up document teardown
if (mIdentifierMap.Count() == 0)
return;
nsIdentifierMapEntry *entry =
mIdentifierMap.GetEntry(nsDependentAtomString(aName));
if (!entry) // Could be false if the element was anonymous, hence never added
return;
entry->RemoveNameElement(aElement);
if (!entry->HasNameElement() &&
!entry->HasIdElementExposedAsHTMLDocumentProperty()) {
++mExpandoAndGeneration.generation;
}
}
void
nsDocument::AddToIdTable(Element *aElement, nsIAtom* aId)
{
nsIdentifierMapEntry *entry =
mIdentifierMap.PutEntry(nsDependentAtomString(aId));
if (entry) { /* True except on OOM */
if (nsGenericHTMLElement::ShouldExposeIdAsHTMLDocumentProperty(aElement) &&
!entry->HasNameElement() &&
!entry->HasIdElementExposedAsHTMLDocumentProperty()) {
++mExpandoAndGeneration.generation;
}
entry->AddIdElement(aElement);
}
}
void
nsDocument::RemoveFromIdTable(Element *aElement, nsIAtom* aId)
{
NS_ASSERTION(aId, "huhwhatnow?");
// Speed up document teardown
if (mIdentifierMap.Count() == 0) {
return;
}
nsIdentifierMapEntry *entry =
mIdentifierMap.GetEntry(nsDependentAtomString(aId));
if (!entry) // Can be null for XML elements with changing ids.
return;
entry->RemoveIdElement(aElement);
if (nsGenericHTMLElement::ShouldExposeIdAsHTMLDocumentProperty(aElement) &&
!entry->HasNameElement() &&
!entry->HasIdElementExposedAsHTMLDocumentProperty()) {
++mExpandoAndGeneration.generation;
}
if (entry->IsEmpty()) {
mIdentifierMap.RemoveEntry(entry);
}
}
nsIPrincipal*
nsDocument::GetPrincipal()
{
return NodePrincipal();
}
extern bool sDisablePrefetchHTTPSPref;
void
nsDocument::SetPrincipal(nsIPrincipal *aNewPrincipal)
{
if (aNewPrincipal && mAllowDNSPrefetch && sDisablePrefetchHTTPSPref) {
nsCOMPtr<nsIURI> uri;
aNewPrincipal->GetURI(getter_AddRefs(uri));
bool isHTTPS;
if (!uri || NS_FAILED(uri->SchemeIs("https", &isHTTPS)) ||
isHTTPS) {
mAllowDNSPrefetch = false;
}
}
mNodeInfoManager->SetDocumentPrincipal(aNewPrincipal);
}
NS_IMETHODIMP
nsDocument::GetApplicationCache(nsIApplicationCache **aApplicationCache)
{
NS_IF_ADDREF(*aApplicationCache = mApplicationCache);
return NS_OK;
}
NS_IMETHODIMP
nsDocument::SetApplicationCache(nsIApplicationCache *aApplicationCache)
{
mApplicationCache = aApplicationCache;
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetContentType(nsAString& aContentType)
{
CopyUTF8toUTF16(GetContentTypeInternal(), aContentType);
return NS_OK;
}
void
nsDocument::SetContentType(const nsAString& aContentType)
{
SetContentTypeInternal(NS_ConvertUTF16toUTF8(aContentType));
}
nsresult
nsDocument::GetAllowPlugins(bool * aAllowPlugins)
{
// First, we ask our docshell if it allows plugins.
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
if (docShell) {
docShell->GetAllowPlugins(aAllowPlugins);
// If the docshell allows plugins, we check whether
// we are sandboxed and plugins should not be allowed.
if (*aAllowPlugins)
*aAllowPlugins = !(mSandboxFlags & SANDBOXED_PLUGINS);
}
return NS_OK;
}
already_AddRefed<UndoManager>
nsDocument::GetUndoManager()
{
Element* rootElement = GetRootElement();
if (!rootElement) {
return nullptr;
}
if (!mUndoManager) {
mUndoManager = new UndoManager(rootElement);
}
RefPtr<UndoManager> undoManager = mUndoManager;
return undoManager.forget();
}
bool
nsDocument::IsElementAnimateEnabled(JSContext* /*unused*/, JSObject* /*unused*/)
{
MOZ_ASSERT(NS_IsMainThread());
return nsContentUtils::IsCallerChrome() ||
Preferences::GetBool("dom.animations-api.core.enabled") ||
Preferences::GetBool("dom.animations-api.element-animate.enabled");
}
bool
nsDocument::IsWebAnimationsEnabled(JSContext* /*unused*/, JSObject* /*unused*/)
{
MOZ_ASSERT(NS_IsMainThread());
return nsContentUtils::IsCallerChrome() ||
Preferences::GetBool("dom.animations-api.core.enabled");
}
DocumentTimeline*
nsDocument::Timeline()
{
if (!mDocumentTimeline) {
mDocumentTimeline = new DocumentTimeline(this, TimeDuration(0));
}
return mDocumentTimeline;
}
void
nsDocument::GetAnimations(nsTArray<RefPtr<Animation>>& aAnimations)
{
Element* root = GetRootElement();
if (!root) {
return;
}
AnimationFilter filter;
filter.mSubtree = true;
root->GetAnimations(filter, aAnimations);
}
SVGSVGElement*
nsIDocument::GetSVGRootElement() const
{
Element* root = GetRootElement();
if (!root || !root->IsSVGElement(nsGkAtoms::svg)) {
return nullptr;
}
return static_cast<SVGSVGElement*>(root);
}
/* Return true if the document is in the focused top-level window, and is an
* ancestor of the focused DOMWindow. */
NS_IMETHODIMP
nsDocument::HasFocus(bool* aResult)
{
ErrorResult rv;
*aResult = nsIDocument::HasFocus(rv);
return rv.StealNSResult();
}
bool
nsIDocument::HasFocus(ErrorResult& rv) const
{
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm) {
rv.Throw(NS_ERROR_NOT_AVAILABLE);
return false;
}
// Is there a focused DOMWindow?
nsCOMPtr<mozIDOMWindowProxy> focusedWindow;
fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
if (!focusedWindow) {
return false;
}
nsPIDOMWindowOuter* piWindow = nsPIDOMWindowOuter::From(focusedWindow);
// Are we an ancestor of the focused DOMWindow?
for (nsIDocument* currentDoc = piWindow->GetDoc(); currentDoc;
currentDoc = currentDoc->GetParentDocument()) {
if (currentDoc == this) {
// Yes, we are an ancestor
return true;
}
}
return false;
}
NS_IMETHODIMP
nsDocument::GetReferrer(nsAString& aReferrer)
{
nsIDocument::GetReferrer(aReferrer);
return NS_OK;
}
void
nsIDocument::GetReferrer(nsAString& aReferrer) const
{
if (mIsSrcdocDocument && mParentDocument)
mParentDocument->GetReferrer(aReferrer);
else
CopyUTF8toUTF16(mReferrer, aReferrer);
}
nsresult
nsIDocument::GetSrcdocData(nsAString &aSrcdocData)
{
if (mIsSrcdocDocument) {
nsCOMPtr<nsIInputStreamChannel> inStrmChan = do_QueryInterface(mChannel);
if (inStrmChan) {
return inStrmChan->GetSrcdocData(aSrcdocData);
}
}
aSrcdocData = NullString();
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetActiveElement(nsIDOMElement **aElement)
{
nsCOMPtr<nsIDOMElement> el(do_QueryInterface(nsIDocument::GetActiveElement()));
el.forget(aElement);
return NS_OK;
}
Element*
nsIDocument::GetActiveElement()
{
// Get the focused element.
if (nsCOMPtr<nsPIDOMWindowOuter> window = GetWindow()) {
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
nsIContent* focusedContent =
nsFocusManager::GetFocusedDescendant(window, false,
getter_AddRefs(focusedWindow));
// be safe and make sure the element is from this document
if (focusedContent && focusedContent->OwnerDoc() == this) {
if (focusedContent->ChromeOnlyAccess()) {
focusedContent = focusedContent->FindFirstNonChromeOnlyAccessContent();
}
if (focusedContent) {
return focusedContent->AsElement();
}
}
}
// No focused element anywhere in this document. Try to get the BODY.
RefPtr<nsHTMLDocument> htmlDoc = AsHTMLDocument();
if (htmlDoc) {
// Because of IE compatibility, return null when html document doesn't have
// a body.
return htmlDoc->GetBody();
}
// If we couldn't get a BODY, return the root element.
return GetDocumentElement();
}
NS_IMETHODIMP
nsDocument::GetCurrentScript(nsIDOMElement **aElement)
{
nsCOMPtr<nsIDOMElement> el(do_QueryInterface(nsIDocument::GetCurrentScript()));
el.forget(aElement);
return NS_OK;
}
Element*
nsIDocument::GetCurrentScript()
{
nsCOMPtr<Element> el(do_QueryInterface(ScriptLoader()->GetCurrentScript()));
return el;
}
NS_IMETHODIMP
nsDocument::ElementFromPoint(float aX, float aY, nsIDOMElement** aReturn)
{
Element* el = nsIDocument::ElementFromPoint(aX, aY);
nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(el);
retval.forget(aReturn);
return NS_OK;
}
Element*
nsIDocument::ElementFromPoint(float aX, float aY)
{
return ElementFromPointHelper(aX, aY, false, true);
}
void
nsIDocument::ElementsFromPoint(float aX, float aY,
nsTArray<RefPtr<Element>>& aElements)
{
ElementsFromPointHelper(aX, aY, nsIDocument::FLUSH_LAYOUT, aElements);
}
Element*
nsDocument::ElementFromPointHelper(float aX, float aY,
bool aIgnoreRootScrollFrame,
bool aFlushLayout)
{
AutoTArray<RefPtr<Element>, 1> elementArray;
ElementsFromPointHelper(aX, aY,
((aIgnoreRootScrollFrame ? nsIDocument::IGNORE_ROOT_SCROLL_FRAME : 0) |
(aFlushLayout ? nsIDocument::FLUSH_LAYOUT : 0) |
nsIDocument::IS_ELEMENT_FROM_POINT),
elementArray);
if (elementArray.IsEmpty()) {
return nullptr;
}
return elementArray[0];
}
void
nsDocument::ElementsFromPointHelper(float aX, float aY,
uint32_t aFlags,
nsTArray<RefPtr<mozilla::dom::Element>>& aElements)
{
// As per the the spec, we return null if either coord is negative
if (!(aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) && (aX < 0 || aY < 0)) {
return;
}
nscoord x = nsPresContext::CSSPixelsToAppUnits(aX);
nscoord y = nsPresContext::CSSPixelsToAppUnits(aY);
nsPoint pt(x, y);
// Make sure the layout information we get is up-to-date, and
// ensure we get a root frame (for everything but XUL)
if (aFlags & nsIDocument::FLUSH_LAYOUT) {
FlushPendingNotifications(Flush_Layout);
}
nsIPresShell *ps = GetShell();
if (!ps) {
return;
}
nsIFrame *rootFrame = ps->GetRootFrame();
// XUL docs, unlike HTML, have no frame tree until everything's done loading
if (!rootFrame) {
return; // return null to premature XUL callers as a reminder to wait
}
nsTArray<nsIFrame*> outFrames;
// Emulate what GetFrameAtPoint does, since we want all the frames under our
// point.
nsLayoutUtils::GetFramesForArea(rootFrame, nsRect(pt, nsSize(1, 1)), outFrames,
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC |
((aFlags & nsIDocument::IGNORE_ROOT_SCROLL_FRAME) ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
// Dunno when this would ever happen, as we should at least have a root frame under us?
if (outFrames.IsEmpty()) {
return;
}
// Used to filter out repeated elements in sequence.
nsIContent* lastAdded = nullptr;
for (uint32_t i = 0; i < outFrames.Length(); i++) {
nsIContent* node = GetContentInThisDocument(outFrames[i]);
if (!node || !node->IsElement()) {
// If this helper is called via ElementsFromPoint, we need to make sure
// our frame is an element. Otherwise return whatever the top frame is
// even if it isn't the top-painted element.
if (!(aFlags & nsIDocument::IS_ELEMENT_FROM_POINT)) {
continue;
}
node = node->GetParent();
}
if (node && node != lastAdded) {
aElements.AppendElement(node->AsElement());
lastAdded = node;
// If this helper is called via ElementFromPoint, just return the first
// element we find.
if (aFlags & nsIDocument::IS_ELEMENT_FROM_POINT) {
return;
}
}
}
}
nsresult
nsDocument::NodesFromRectHelper(float aX, float aY,
float aTopSize, float aRightSize,
float aBottomSize, float aLeftSize,
bool aIgnoreRootScrollFrame,
bool aFlushLayout,
nsIDOMNodeList** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
nsSimpleContentList* elements = new nsSimpleContentList(this);
NS_ADDREF(elements);
*aReturn = elements;
// Following the same behavior of elementFromPoint,
// we don't return anything if either coord is negative
if (!aIgnoreRootScrollFrame && (aX < 0 || aY < 0))
return NS_OK;
nscoord x = nsPresContext::CSSPixelsToAppUnits(aX - aLeftSize);
nscoord y = nsPresContext::CSSPixelsToAppUnits(aY - aTopSize);
nscoord w = nsPresContext::CSSPixelsToAppUnits(aLeftSize + aRightSize) + 1;
nscoord h = nsPresContext::CSSPixelsToAppUnits(aTopSize + aBottomSize) + 1;
nsRect rect(x, y, w, h);
// Make sure the layout information we get is up-to-date, and
// ensure we get a root frame (for everything but XUL)
if (aFlushLayout) {
FlushPendingNotifications(Flush_Layout);
}
nsIPresShell *ps = GetShell();
NS_ENSURE_STATE(ps);
nsIFrame *rootFrame = ps->GetRootFrame();
// XUL docs, unlike HTML, have no frame tree until everything's done loading
if (!rootFrame)
return NS_OK; // return nothing to premature XUL callers as a reminder to wait
AutoTArray<nsIFrame*,8> outFrames;
nsLayoutUtils::GetFramesForArea(rootFrame, rect, outFrames,
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC |
(aIgnoreRootScrollFrame ? nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME : 0));
// Used to filter out repeated elements in sequence.
nsIContent* lastAdded = nullptr;
for (uint32_t i = 0; i < outFrames.Length(); i++) {
nsIContent* node = GetContentInThisDocument(outFrames[i]);
if (node && !node->IsElement() && !node->IsNodeOfType(nsINode::eTEXT)) {
// We have a node that isn't an element or a text node,
// use its parent content instead.
node = node->GetParent();
}
if (node && node != lastAdded) {
elements->AppendElement(node);
lastAdded = node;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetElementsByClassName(const nsAString& aClasses,
nsIDOMNodeList** aReturn)
{
*aReturn = nsIDocument::GetElementsByClassName(aClasses).take();
return NS_OK;
}
already_AddRefed<nsContentList>
nsIDocument::GetElementsByClassName(const nsAString& aClasses)
{
return nsContentUtils::GetElementsByClassName(this, aClasses);
}
NS_IMETHODIMP
nsDocument::ReleaseCapture()
{
nsIDocument::ReleaseCapture();
return NS_OK;
}
void
nsIDocument::ReleaseCapture() const
{
// only release the capture if the caller can access it. This prevents a
// page from stopping a scrollbar grab for example.
nsCOMPtr<nsINode> node = nsIPresShell::GetCapturingContent();
if (node && nsContentUtils::CanCallerAccess(node)) {
nsIPresShell::SetCapturingContent(nullptr, 0);
}
}
already_AddRefed<nsIURI>
nsIDocument::GetBaseURI(bool aTryUseXHRDocBaseURI) const
{
nsCOMPtr<nsIURI> uri;
if (aTryUseXHRDocBaseURI && mChromeXHRDocBaseURI) {
uri = mChromeXHRDocBaseURI;
} else {
uri = GetDocBaseURI();
}
return uri.forget();
}
void
nsDocument::SetBaseURI(nsIURI* aURI)
{
if (!aURI && !mDocumentBaseURI) {
return;
}
// Don't do anything if the URI wasn't actually changed.
if (aURI && mDocumentBaseURI) {
bool equalBases = false;
mDocumentBaseURI->Equals(aURI, &equalBases);
if (equalBases) {
return;
}
}
if (aURI) {
mDocumentBaseURI = NS_TryToMakeImmutable(aURI);
} else {
mDocumentBaseURI = nullptr;
}
RefreshLinkHrefs();
}
void
nsDocument::GetBaseTarget(nsAString &aBaseTarget)
{
aBaseTarget = mBaseTarget;
}
void
nsDocument::SetDocumentCharacterSet(const nsACString& aCharSetID)
{
// XXX it would be a good idea to assert the sanity of the argument,
// but before we figure out what to do about non-Encoding Standard
// encodings in the charset menu and in mailnews, assertions are futile.
if (!mCharacterSet.Equals(aCharSetID)) {
if (mMasterDocument && !aCharSetID.EqualsLiteral("UTF-8")) {
// Imports are always UTF-8
return;
}
mCharacterSet = aCharSetID;
int32_t n = mCharSetObservers.Length();
for (int32_t i = 0; i < n; i++) {
nsIObserver* observer = mCharSetObservers.ElementAt(i);
observer->Observe(static_cast<nsIDocument *>(this), "charset",
NS_ConvertASCIItoUTF16(aCharSetID).get());
}
}
}
nsresult
nsDocument::AddCharSetObserver(nsIObserver* aObserver)
{
NS_ENSURE_ARG_POINTER(aObserver);
NS_ENSURE_TRUE(mCharSetObservers.AppendElement(aObserver), NS_ERROR_FAILURE);
return NS_OK;
}
void
nsDocument::RemoveCharSetObserver(nsIObserver* aObserver)
{
mCharSetObservers.RemoveElement(aObserver);
}
void
nsIDocument::GetSandboxFlagsAsString(nsAString& aFlags)
{
nsContentUtils::SandboxFlagsToString(mSandboxFlags, aFlags);
}
void
nsDocument::GetHeaderData(nsIAtom* aHeaderField, nsAString& aData) const
{
aData.Truncate();
const nsDocHeaderData* data = mHeaderData;
while (data) {
if (data->mField == aHeaderField) {
aData = data->mData;
break;
}
data = data->mNext;
}
}
void
nsDocument::SetHeaderData(nsIAtom* aHeaderField, const nsAString& aData)
{
if (!aHeaderField) {
NS_ERROR("null headerField");
return;
}
if (!mHeaderData) {
if (!aData.IsEmpty()) { // don't bother storing empty string
mHeaderData = new nsDocHeaderData(aHeaderField, aData);
}
}
else {
nsDocHeaderData* data = mHeaderData;
nsDocHeaderData** lastPtr = &mHeaderData;
bool found = false;
do { // look for existing and replace
if (data->mField == aHeaderField) {
if (!aData.IsEmpty()) {
data->mData.Assign(aData);
}
else { // don't store empty string
*lastPtr = data->mNext;
data->mNext = nullptr;
delete data;
}
found = true;
break;
}
lastPtr = &(data->mNext);
data = *lastPtr;
} while (data);
if (!aData.IsEmpty() && !found) {
// didn't find, append
*lastPtr = new nsDocHeaderData(aHeaderField, aData);
}
}
if (aHeaderField == nsGkAtoms::headerContentLanguage) {
CopyUTF16toUTF8(aData, mContentLanguage);
}
if (aHeaderField == nsGkAtoms::headerDefaultStyle) {
// Only mess with our stylesheets if we don't have a lastStyleSheetSet, per
// spec.
if (DOMStringIsNull(mLastStyleSheetSet)) {
// Calling EnableStyleSheetsForSetInternal, not SetSelectedStyleSheetSet,
// per spec. The idea here is that we're changing our preferred set and
// that shouldn't change the value of lastStyleSheetSet. Also, we're
// using the Internal version so we can update the CSSLoader and not have
// to worry about null strings.
EnableStyleSheetsForSetInternal(aData, true);
}
}
if (aHeaderField == nsGkAtoms::refresh) {
// We get into this code before we have a script global yet, so get to
// our container via mDocumentContainer.
nsCOMPtr<nsIRefreshURI> refresher(mDocumentContainer);
if (refresher) {
// Note: using mDocumentURI instead of mBaseURI here, for consistency
// (used to just use the current URI of our webnavigation, but that
// should really be the same thing). Note that this code can run
// before the current URI of the webnavigation has been updated, so we
// can't assert equality here.
refresher->SetupRefreshURIFromHeader(mDocumentURI, NodePrincipal(),
NS_ConvertUTF16toUTF8(aData));
}
}
if (aHeaderField == nsGkAtoms::headerDNSPrefetchControl &&
mAllowDNSPrefetch) {
// Chromium treats any value other than 'on' (case insensitive) as 'off'.
mAllowDNSPrefetch = aData.IsEmpty() || aData.LowerCaseEqualsLiteral("on");
}
if (aHeaderField == nsGkAtoms::viewport ||
aHeaderField == nsGkAtoms::handheldFriendly ||
aHeaderField == nsGkAtoms::viewport_minimum_scale ||
aHeaderField == nsGkAtoms::viewport_maximum_scale ||
aHeaderField == nsGkAtoms::viewport_initial_scale ||
aHeaderField == nsGkAtoms::viewport_height ||
aHeaderField == nsGkAtoms::viewport_width ||
aHeaderField == nsGkAtoms::viewport_user_scalable) {
mViewportType = Unknown;
}
// Referrer policy spec says to ignore any empty referrer policies.
if (aHeaderField == nsGkAtoms::referrer && !aData.IsEmpty()) {
ReferrerPolicy policy = mozilla::net::ReferrerPolicyFromString(aData);
// If policy is not the empty string, then set element's node document's
// referrer policy to policy
if (policy != mozilla::net::RP_Unset) {
// Referrer policy spec (section 6.1) says that we always use the newest
// referrer policy we find
mReferrerPolicy = policy;
mReferrerPolicySet = true;
}
}
if (aHeaderField == nsGkAtoms::headerReferrerPolicy && !aData.IsEmpty()) {
ReferrerPolicy policy = nsContentUtils::GetReferrerPolicyFromHeader(aData);
if (policy != mozilla::net::RP_Unset) {
mReferrerPolicy = policy;
mReferrerPolicySet = true;
}
}
}
void
nsDocument::TryChannelCharset(nsIChannel *aChannel,
int32_t& aCharsetSource,
nsACString& aCharset,
nsHtml5TreeOpExecutor* aExecutor)
{
if (aChannel) {
nsAutoCString charsetVal;
nsresult rv = aChannel->GetContentCharset(charsetVal);
if (NS_SUCCEEDED(rv)) {
nsAutoCString preferred;
if(EncodingUtils::FindEncodingForLabel(charsetVal, preferred)) {
aCharset = preferred;
aCharsetSource = kCharsetFromChannel;
return;
} else if (aExecutor && !charsetVal.IsEmpty()) {
aExecutor->ComplainAboutBogusProtocolCharset(this);
}
}
}
}
already_AddRefed<nsIPresShell>
nsDocument::CreateShell(nsPresContext* aContext, nsViewManager* aViewManager,
StyleSetHandle aStyleSet)
{
// Don't add anything here. Add it to |doCreateShell| instead.
// This exists so that subclasses can pass other values for the 4th
// parameter some of the time.
return doCreateShell(aContext, aViewManager, aStyleSet);
}
already_AddRefed<nsIPresShell>
nsDocument::doCreateShell(nsPresContext* aContext,
nsViewManager* aViewManager, StyleSetHandle aStyleSet)
{
NS_ASSERTION(!mPresShell, "We have a presshell already!");
NS_ENSURE_FALSE(GetBFCacheEntry(), nullptr);
FillStyleSet(aStyleSet);
RefPtr<PresShell> shell = new PresShell;
shell->Init(this, aContext, aViewManager, aStyleSet);
// Note: we don't hold a ref to the shell (it holds a ref to us)
mPresShell = shell;
// Make sure to never paint if we belong to an invisible DocShell.
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
if (docShell && docShell->IsInvisible())
shell->SetNeverPainting(true);
mExternalResourceMap.ShowViewers();
MaybeRescheduleAnimationFrameNotifications();
// Now that we have a shell, we might have @font-face rules.
RebuildUserFontSet();
return shell.forget();
}
void
nsDocument::MaybeRescheduleAnimationFrameNotifications()
{
if (!mPresShell || !IsEventHandlingEnabled()) {
// bail out for now, until one of those conditions changes
return;
}
nsRefreshDriver* rd = mPresShell->GetPresContext()->RefreshDriver();
if (!mFrameRequestCallbacks.IsEmpty()) {
rd->ScheduleFrameRequestCallbacks(this);
}
}
void
nsIDocument::TakeFrameRequestCallbacks(FrameRequestCallbackList& aCallbacks)
{
aCallbacks.AppendElements(mFrameRequestCallbacks);
mFrameRequestCallbacks.Clear();
}
bool
nsIDocument::ShouldThrottleFrameRequests()
{
if (mStaticCloneCount > 0) {
// Even if we're not visible, a static clone may be, so run at full speed.
return false;
}
if (Hidden()) {
// We're not visible (probably in a background tab or the bf cache).
return true;
}
if (!mPresShell) {
return false; // Can't do anything smarter.
}
nsIFrame* frame = mPresShell->GetRootFrame();
if (!frame) {
return false; // Can't do anything smarter.
}
nsIFrame* displayRootFrame = nsLayoutUtils::GetDisplayRootFrame(frame);
if (!displayRootFrame) {
return false; // Can't do anything smarter.
}
if (!displayRootFrame->DidPaintPresShell(mPresShell)) {
// We didn't get painted during the last paint, so we're not visible.
// Throttle. Note that because we have to paint this document at least
// once to unthrottle it, we will drop one requestAnimationFrame frame
// when a document that previously wasn't visible scrolls into view. This
// is acceptable since it would happen outside the viewport on APZ
// platforms and is unlikely to be human-perceivable on non-APZ platforms.
return true;
}
// We got painted during the last paint, so run at full speed.
return false;
}
void
nsDocument::DeleteShell()
{
mExternalResourceMap.HideViewers();
if (IsEventHandlingEnabled() && !AnimationsPaused()) {
RevokeAnimationFrameNotifications();
}
if (nsPresContext* presContext = mPresShell->GetPresContext()) {
presContext->RefreshDriver()->CancelPendingEvents(this);
}
// When our shell goes away, request that all our images be immediately
// discarded, so we don't carry around decoded image data for a document we
// no longer intend to paint.
for (auto iter = mImageTracker.Iter(); !iter.Done(); iter.Next()) {
iter.Key()->RequestDiscard();
}
// Now that we no longer have a shell, we need to forget about any FontFace
// objects for @font-face rules that came from the style set.
RebuildUserFontSet();
mPresShell = nullptr;
mStyleSetFilled = false;
}
void
nsDocument::RevokeAnimationFrameNotifications()
{
if (!mFrameRequestCallbacks.IsEmpty()) {
mPresShell->GetPresContext()->RefreshDriver()->
RevokeFrameRequestCallbacks(this);
}
}
static void
SubDocClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
{
SubDocMapEntry *e = static_cast<SubDocMapEntry *>(entry);
NS_RELEASE(e->mKey);
if (e->mSubDocument) {
e->mSubDocument->SetParentDocument(nullptr);
NS_RELEASE(e->mSubDocument);
}
}
static void
SubDocInitEntry(PLDHashEntryHdr *entry, const void *key)
{
SubDocMapEntry *e =
const_cast<SubDocMapEntry *>
(static_cast<const SubDocMapEntry *>(entry));
e->mKey = const_cast<Element*>(static_cast<const Element*>(key));
NS_ADDREF(e->mKey);
e->mSubDocument = nullptr;
}
nsresult
nsDocument::SetSubDocumentFor(Element* aElement, nsIDocument* aSubDoc)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_UNEXPECTED);
if (!aSubDoc) {
// aSubDoc is nullptr, remove the mapping
if (mSubDocuments) {
mSubDocuments->Remove(aElement);
}
} else {
if (!mSubDocuments) {
// Create a new hashtable
static const PLDHashTableOps hash_table_ops =
{
PLDHashTable::HashVoidPtrKeyStub,
PLDHashTable::MatchEntryStub,
PLDHashTable::MoveEntryStub,
SubDocClearEntry,
SubDocInitEntry
};
mSubDocuments = new PLDHashTable(&hash_table_ops, sizeof(SubDocMapEntry));
}
// Add a mapping to the hash table
auto entry =
static_cast<SubDocMapEntry*>(mSubDocuments->Add(aElement, fallible));
if (!entry) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (entry->mSubDocument) {
entry->mSubDocument->SetParentDocument(nullptr);
// Release the old sub document
NS_RELEASE(entry->mSubDocument);
}
entry->mSubDocument = aSubDoc;
NS_ADDREF(entry->mSubDocument);
aSubDoc->SetParentDocument(this);
}
return NS_OK;
}
nsIDocument*
nsDocument::GetSubDocumentFor(nsIContent *aContent) const
{
if (mSubDocuments && aContent->IsElement()) {
auto entry = static_cast<SubDocMapEntry*>
(mSubDocuments->Search(aContent->AsElement()));
if (entry) {
return entry->mSubDocument;
}
}
return nullptr;
}
Element*
nsDocument::FindContentForSubDocument(nsIDocument *aDocument) const
{
NS_ENSURE_TRUE(aDocument, nullptr);
if (!mSubDocuments) {
return nullptr;
}
for (auto iter = mSubDocuments->Iter(); !iter.Done(); iter.Next()) {
auto entry = static_cast<SubDocMapEntry*>(iter.Get());
if (entry->mSubDocument == aDocument) {
return entry->mKey;
}
}
return nullptr;
}
bool
nsDocument::IsNodeOfType(uint32_t aFlags) const
{
return !(aFlags & ~eDOCUMENT);
}
Element*
nsIDocument::GetRootElement() const
{
return (mCachedRootElement && mCachedRootElement->GetParentNode() == this) ?
mCachedRootElement : GetRootElementInternal();
}
Element*
nsDocument::GetRootElementInternal() const
{
// Loop backwards because any non-elements, such as doctypes and PIs
// are likely to appear before the root element.
uint32_t i;
for (i = mChildren.ChildCount(); i > 0; --i) {
nsIContent* child = mChildren.ChildAt(i - 1);
if (child->IsElement()) {
const_cast<nsDocument*>(this)->mCachedRootElement = child->AsElement();
return child->AsElement();
}
}
const_cast<nsDocument*>(this)->mCachedRootElement = nullptr;
return nullptr;
}
nsIContent *
nsDocument::GetChildAt(uint32_t aIndex) const
{
return mChildren.GetSafeChildAt(aIndex);
}
int32_t
nsDocument::IndexOf(const nsINode* aPossibleChild) const
{
return mChildren.IndexOfChild(aPossibleChild);
}
uint32_t
nsDocument::GetChildCount() const
{
return mChildren.ChildCount();
}
nsIContent * const *
nsDocument::GetChildArray(uint32_t* aChildCount) const
{
return mChildren.GetChildArray(aChildCount);
}
nsresult
nsDocument::InsertChildAt(nsIContent* aKid, uint32_t aIndex,
bool aNotify)
{
if (aKid->IsElement() && GetRootElement()) {
NS_WARNING("Inserting root element when we already have one");
return NS_ERROR_DOM_HIERARCHY_REQUEST_ERR;
}
return doInsertChildAt(aKid, aIndex, aNotify, mChildren);
}
void
nsDocument::RemoveChildAt(uint32_t aIndex, bool aNotify)
{
nsCOMPtr<nsIContent> oldKid = GetChildAt(aIndex);
if (!oldKid) {
return;
}
if (oldKid->IsElement()) {
// Destroy the link map up front before we mess with the child list.
DestroyElementMaps();
}
doRemoveChildAt(aIndex, aNotify, oldKid, mChildren);
mCachedRootElement = nullptr;
}
void
nsDocument::EnsureOnDemandBuiltInUASheet(StyleSheet* aSheet)
{
if (mOnDemandBuiltInUASheets.Contains(aSheet)) {
return;
}
BeginUpdate(UPDATE_STYLE);
AddOnDemandBuiltInUASheet(aSheet);
EndUpdate(UPDATE_STYLE);
}
void
nsDocument::AddOnDemandBuiltInUASheet(StyleSheet* aSheet)
{
MOZ_ASSERT(!mOnDemandBuiltInUASheets.Contains(aSheet));
// Prepend here so that we store the sheets in mOnDemandBuiltInUASheets in
// the same order that they should end up in the style set.
mOnDemandBuiltInUASheets.InsertElementAt(0, aSheet);
if (aSheet->IsApplicable()) {
// This is like |AddStyleSheetToStyleSets|, but for an agent sheet.
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
// Note that prepending here is necessary to make sure that html.css etc.
// do not override Firefox OS/Mobile's content.css sheet. Maybe we should
// have an insertion point to match the order of
// nsDocumentViewer::CreateStyleSet though?
shell->StyleSet()->PrependStyleSheet(SheetType::Agent, aSheet);
}
}
NotifyStyleSheetAdded(aSheet, false);
}
int32_t
nsDocument::GetNumberOfStyleSheets() const
{
return mStyleSheets.Length();
}
StyleSheet*
nsDocument::GetStyleSheetAt(int32_t aIndex) const
{
return mStyleSheets.SafeElementAt(aIndex, nullptr);
}
int32_t
nsDocument::GetIndexOfStyleSheet(const StyleSheet* aSheet) const
{
return mStyleSheets.IndexOf(aSheet);
}
void
nsDocument::AddStyleSheetToStyleSets(StyleSheet* aSheet)
{
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
shell->StyleSet()->AddDocStyleSheet(aSheet, this);
}
}
#define DO_STYLESHEET_NOTIFICATION(className, type, memberName, argName) \
do { \
className##Init init; \
init.mBubbles = true; \
init.mCancelable = true; \
/* XXXheycam ServoStyleSheet doesn't implement DOM interfaces yet */ \
if (aSheet->IsServo()) { \
NS_ERROR("stylo: can't dispatch events for ServoStyleSheets yet"); \
} \
init.mStylesheet = aSheet->IsGecko() ? aSheet->AsGecko() : nullptr; \
init.memberName = argName; \
\
RefPtr<className> event = \
className::Constructor(this, NS_LITERAL_STRING(type), init); \
event->SetTrusted(true); \
event->SetTarget(this); \
RefPtr<AsyncEventDispatcher> asyncDispatcher = \
new AsyncEventDispatcher(this, event); \
asyncDispatcher->mOnlyChromeDispatch = true; \
asyncDispatcher->PostDOMEvent(); \
} while (0);
void
nsDocument::NotifyStyleSheetAdded(StyleSheet* aSheet, bool aDocumentSheet)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleSheetAdded, (aSheet, aDocumentSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleSheetChangeEvent,
"StyleSheetAdded",
mDocumentSheet,
aDocumentSheet);
}
}
void
nsDocument::NotifyStyleSheetRemoved(StyleSheet* aSheet, bool aDocumentSheet)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleSheetRemoved, (aSheet, aDocumentSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleSheetChangeEvent,
"StyleSheetRemoved",
mDocumentSheet,
aDocumentSheet);
}
}
void
nsDocument::AddStyleSheet(StyleSheet* aSheet)
{
NS_PRECONDITION(aSheet, "null arg");
mStyleSheets.AppendElement(aSheet);
aSheet->SetOwningDocument(this);
if (aSheet->IsApplicable()) {
AddStyleSheetToStyleSets(aSheet);
}
NotifyStyleSheetAdded(aSheet, true);
}
void
nsDocument::RemoveStyleSheetFromStyleSets(StyleSheet* aSheet)
{
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
shell->StyleSet()->RemoveDocStyleSheet(aSheet);
}
}
void
nsDocument::RemoveStyleSheet(StyleSheet* aSheet)
{
NS_PRECONDITION(aSheet, "null arg");
RefPtr<StyleSheet> sheet = aSheet; // hold ref so it won't die too soon
if (!mStyleSheets.RemoveElement(aSheet)) {
NS_ASSERTION(mInUnlinkOrDeletion, "stylesheet not found");
return;
}
if (!mIsGoingAway) {
if (aSheet->IsApplicable()) {
RemoveStyleSheetFromStyleSets(aSheet);
}
NotifyStyleSheetRemoved(aSheet, true);
}
aSheet->SetOwningDocument(nullptr);
}
void
nsDocument::UpdateStyleSheets(nsTArray<RefPtr<StyleSheet>>& aOldSheets,
nsTArray<RefPtr<StyleSheet>>& aNewSheets)
{
BeginUpdate(UPDATE_STYLE);
// XXX Need to set the sheet on the ownernode, if any
NS_PRECONDITION(aOldSheets.Length() == aNewSheets.Length(),
"The lists must be the same length!");
int32_t count = aOldSheets.Length();
RefPtr<StyleSheet> oldSheet;
int32_t i;
for (i = 0; i < count; ++i) {
oldSheet = aOldSheets[i];
// First remove the old sheet.
NS_ASSERTION(oldSheet, "None of the old sheets should be null");
int32_t oldIndex = mStyleSheets.IndexOf(oldSheet);
RemoveStyleSheet(oldSheet); // This does the right notifications
// Now put the new one in its place. If it's null, just ignore it.
StyleSheet* newSheet = aNewSheets[i];
if (newSheet) {
mStyleSheets.InsertElementAt(oldIndex, newSheet);
newSheet->SetOwningDocument(this);
if (newSheet->IsApplicable()) {
AddStyleSheetToStyleSets(newSheet);
}
NotifyStyleSheetAdded(newSheet, true);
}
}
EndUpdate(UPDATE_STYLE);
}
void
nsDocument::InsertStyleSheetAt(StyleSheet* aSheet, int32_t aIndex)
{
NS_PRECONDITION(aSheet, "null ptr");
mStyleSheets.InsertElementAt(aIndex, aSheet);
aSheet->SetOwningDocument(this);
if (aSheet->IsApplicable()) {
AddStyleSheetToStyleSets(aSheet);
}
NotifyStyleSheetAdded(aSheet, true);
}
void
nsDocument::SetStyleSheetApplicableState(StyleSheet* aSheet,
bool aApplicable)
{
NS_PRECONDITION(aSheet, "null arg");
// If we're actually in the document style sheet list
if (mStyleSheets.IndexOf(aSheet) != mStyleSheets.NoIndex) {
if (aApplicable) {
AddStyleSheetToStyleSets(aSheet);
} else {
RemoveStyleSheetFromStyleSets(aSheet);
}
}
// We have to always notify, since this will be called for sheets
// that are children of sheets in our style set, as well as some
// sheets for HTMLEditor.
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleSheetApplicableStateChanged, (aSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleSheetApplicableStateChangeEvent,
"StyleSheetApplicableStateChanged",
mApplicable,
aApplicable);
}
if (!mSSApplicableStateNotificationPending) {
nsCOMPtr<nsIRunnable> notification = NewRunnableMethod(this,
&nsDocument::NotifyStyleSheetApplicableStateChanged);
mSSApplicableStateNotificationPending =
NS_SUCCEEDED(NS_DispatchToCurrentThread(notification));
}
}
void
nsDocument::NotifyStyleSheetApplicableStateChanged()
{
mSSApplicableStateNotificationPending = false;
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(static_cast<nsIDocument*>(this),
"style-sheet-applicable-state-changed",
nullptr);
}
}
static SheetType
ConvertAdditionalSheetType(nsIDocument::additionalSheetType aType)
{
switch(aType) {
case nsIDocument::eAgentSheet:
return SheetType::Agent;
case nsIDocument::eUserSheet:
return SheetType::User;
case nsIDocument::eAuthorSheet:
return SheetType::Doc;
default:
MOZ_ASSERT(false, "wrong type");
// we must return something although this should never happen
return SheetType::Count;
}
}
static int32_t
FindSheet(const nsTArray<RefPtr<StyleSheet>>& aSheets, nsIURI* aSheetURI)
{
for (int32_t i = aSheets.Length() - 1; i >= 0; i-- ) {
bool bEqual;
nsIURI* uri = aSheets[i]->GetSheetURI();
if (uri && NS_SUCCEEDED(uri->Equals(aSheetURI, &bEqual)) && bEqual)
return i;
}
return -1;
}
nsresult
nsDocument::LoadAdditionalStyleSheet(additionalSheetType aType,
nsIURI* aSheetURI)
{
NS_PRECONDITION(aSheetURI, "null arg");
// Checking if we have loaded this one already.
if (FindSheet(mAdditionalSheets[aType], aSheetURI) >= 0)
return NS_ERROR_INVALID_ARG;
// Loading the sheet sync.
RefPtr<css::Loader> loader = new css::Loader(GetStyleBackendType());
css::SheetParsingMode parsingMode;
switch (aType) {
case nsIDocument::eAgentSheet:
parsingMode = css::eAgentSheetFeatures;
break;
case nsIDocument::eUserSheet:
parsingMode = css::eUserSheetFeatures;
break;
case nsIDocument::eAuthorSheet:
parsingMode = css::eAuthorSheetFeatures;
break;
default:
MOZ_CRASH("impossible value for aType");
}
RefPtr<StyleSheet> sheet;
nsresult rv = loader->LoadSheetSync(aSheetURI, parsingMode, true, &sheet);
NS_ENSURE_SUCCESS(rv, rv);
sheet->SetOwningDocument(this);
MOZ_ASSERT(sheet->IsApplicable());
return AddAdditionalStyleSheet(aType, sheet);
}
nsresult
nsDocument::AddAdditionalStyleSheet(additionalSheetType aType, StyleSheet* aSheet)
{
if (mAdditionalSheets[aType].Contains(aSheet))
return NS_ERROR_INVALID_ARG;
if (!aSheet->IsApplicable())
return NS_ERROR_INVALID_ARG;
mAdditionalSheets[aType].AppendElement(aSheet);
BeginUpdate(UPDATE_STYLE);
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
SheetType type = ConvertAdditionalSheetType(aType);
shell->StyleSet()->AppendStyleSheet(type, aSheet);
}
// Passing false, so documet.styleSheets.length will not be affected by
// these additional sheets.
NotifyStyleSheetAdded(aSheet, false);
EndUpdate(UPDATE_STYLE);
return NS_OK;
}
void
nsDocument::RemoveAdditionalStyleSheet(additionalSheetType aType, nsIURI* aSheetURI)
{
MOZ_ASSERT(aSheetURI);
nsTArray<RefPtr<StyleSheet>>& sheets = mAdditionalSheets[aType];
int32_t i = FindSheet(mAdditionalSheets[aType], aSheetURI);
if (i >= 0) {
RefPtr<StyleSheet> sheetRef = sheets[i];
sheets.RemoveElementAt(i);
BeginUpdate(UPDATE_STYLE);
if (!mIsGoingAway) {
MOZ_ASSERT(sheetRef->IsApplicable());
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
SheetType type = ConvertAdditionalSheetType(aType);
shell->StyleSet()->RemoveStyleSheet(type, sheetRef);
}
}
// Passing false, so documet.styleSheets.length will not be affected by
// these additional sheets.
NotifyStyleSheetRemoved(sheetRef, false);
EndUpdate(UPDATE_STYLE);
sheetRef->SetOwningDocument(nullptr);
}
}
StyleSheet*
nsDocument::GetFirstAdditionalAuthorSheet()
{
return mAdditionalSheets[eAuthorSheet].SafeElementAt(0);
}
nsIGlobalObject*
nsDocument::GetScopeObject() const
{
nsCOMPtr<nsIGlobalObject> scope(do_QueryReferent(mScopeObject));
return scope;
}
void
nsDocument::SetScopeObject(nsIGlobalObject* aGlobal)
{
mScopeObject = do_GetWeakReference(aGlobal);
if (aGlobal) {
mHasHadScriptHandlingObject = true;
}
}
static void
CheckIfContainsEMEContent(nsISupports* aSupports, void* aContainsEME)
{
nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aSupports));
if (domMediaElem) {
nsCOMPtr<nsIContent> content(do_QueryInterface(domMediaElem));
MOZ_ASSERT(content, "aSupports is not a content");
HTMLMediaElement* mediaElem = static_cast<HTMLMediaElement*>(content.get());
bool* contains = static_cast<bool*>(aContainsEME);
if (mediaElem->GetMediaKeys()) {
*contains = true;
}
}
}
bool
nsDocument::ContainsEMEContent()
{
bool containsEME = false;
EnumerateActivityObservers(CheckIfContainsEMEContent,
static_cast<void*>(&containsEME));
return containsEME;
}
static void
CheckIfContainsMSEContent(nsISupports* aSupports, void* aContainsMSE)
{
nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aSupports));
if (domMediaElem) {
nsCOMPtr<nsIContent> content(do_QueryInterface(domMediaElem));
MOZ_ASSERT(content, "aSupports is not a content");
HTMLMediaElement* mediaElem = static_cast<HTMLMediaElement*>(content.get());
bool* contains = static_cast<bool*>(aContainsMSE);
RefPtr<MediaSource> ms = mediaElem->GetMozMediaSourceObject();
if (ms) {
*contains = true;
}
}
}
bool
nsDocument::ContainsMSEContent()
{
bool containsMSE = false;
EnumerateActivityObservers(CheckIfContainsMSEContent,
static_cast<void*>(&containsMSE));
return containsMSE;
}
static void
NotifyActivityChanged(nsISupports *aSupports, void *aUnused)
{
nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aSupports));
if (domMediaElem) {
nsCOMPtr<nsIContent> content(do_QueryInterface(domMediaElem));
MOZ_ASSERT(content, "aSupports is not a content");
HTMLMediaElement* mediaElem = static_cast<HTMLMediaElement*>(content.get());
mediaElem->NotifyOwnerDocumentActivityChanged();
}
nsCOMPtr<nsIObjectLoadingContent> objectLoadingContent(do_QueryInterface(aSupports));
if (objectLoadingContent) {
nsObjectLoadingContent* olc = static_cast<nsObjectLoadingContent*>(objectLoadingContent.get());
olc->NotifyOwnerDocumentActivityChanged();
}
nsCOMPtr<nsIDocumentActivity> objectDocumentActivity(do_QueryInterface(aSupports));
if (objectDocumentActivity) {
objectDocumentActivity->NotifyOwnerDocumentActivityChanged();
}
}
void
nsIDocument::SetContainer(nsDocShell* aContainer)
{
if (aContainer) {
mDocumentContainer = aContainer;
} else {
mDocumentContainer = WeakPtr<nsDocShell>();
}
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
if (!aContainer) {
return;
}
// Get the Docshell
if (aContainer->ItemType() == nsIDocShellTreeItem::typeContent) {
// check if same type root
nsCOMPtr<nsIDocShellTreeItem> sameTypeRoot;
aContainer->GetSameTypeRootTreeItem(getter_AddRefs(sameTypeRoot));
NS_ASSERTION(sameTypeRoot, "No document shell root tree item from document shell tree item!");
if (sameTypeRoot == aContainer) {
static_cast<nsDocument*>(this)->SetIsTopLevelContentDocument(true);
}
static_cast<nsDocument*>(this)->SetIsContentDocument(true);
}
}
nsISupports*
nsIDocument::GetContainer() const
{
return static_cast<nsIDocShell*>(mDocumentContainer);
}
void
nsDocument::SetScriptGlobalObject(nsIScriptGlobalObject *aScriptGlobalObject)
{
#ifdef DEBUG
{
nsCOMPtr<nsPIDOMWindowInner> win(do_QueryInterface(aScriptGlobalObject));
NS_ASSERTION(!win || win->IsInnerWindow(),
"Script global object must be an inner window!");
}
#endif
MOZ_ASSERT(aScriptGlobalObject || !mAnimationController ||
mAnimationController->IsPausedByType(
nsSMILTimeContainer::PAUSE_PAGEHIDE |
nsSMILTimeContainer::PAUSE_BEGIN),
"Clearing window pointer while animations are unpaused");
if (mScriptGlobalObject && !aScriptGlobalObject) {
// We're detaching from the window. We need to grab a pointer to
// our layout history state now.
mLayoutHistoryState = GetLayoutHistoryState();
if (mPresShell && !EventHandlingSuppressed() && !AnimationsPaused()) {
RevokeAnimationFrameNotifications();
}
// Also make sure to remove our onload blocker now if we haven't done it yet
if (mOnloadBlockCount != 0) {
nsCOMPtr<nsILoadGroup> loadGroup = GetDocumentLoadGroup();
if (loadGroup) {
loadGroup->RemoveRequest(mOnloadBlocker, nullptr, NS_OK);
}
}
using mozilla::dom::workers::ServiceWorkerManager;
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm) {
ErrorResult error;
if (swm->IsControlled(this, error)) {
imgLoader* loader = nsContentUtils::GetImgLoaderForDocument(this);
if (loader) {
loader->ClearCacheForControlledDocument(this);
}
// We may become controlled again if this document comes back out
// of bfcache. Clear our state to allow that to happen. Only
// clear this flag if we are actually controlled, though, so pages
// that were force reloaded don't become controlled when they
// come out of bfcache.
mMaybeServiceWorkerControlled = false;
}
swm->MaybeStopControlling(this);
}
// Remove ourself from the list of clients. We only register
// content principal documents in this list.
if (!nsContentUtils::IsSystemPrincipal(GetPrincipal()) &&
!GetPrincipal()->GetIsNullPrincipal()) {
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->RemoveObserver(this, "service-worker-get-client");
}
}
} else if (!mScriptGlobalObject && aScriptGlobalObject &&
mDocumentContainer && GetChannel() &&
!nsContentUtils::IsSystemPrincipal(GetPrincipal()) &&
!GetPrincipal()->GetIsNullPrincipal()) {
// This document is being activated. Register it in the list of
// clients. We only do this for content principal documents
// since we can never observe system or null principals.
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->AddObserver(this, "service-worker-get-client", /* ownsWeak */ false);
}
}
mScriptGlobalObject = aScriptGlobalObject;
if (aScriptGlobalObject) {
mHasHadScriptHandlingObject = true;
mHasHadDefaultView = true;
// Go back to using the docshell for the layout history state
mLayoutHistoryState = nullptr;
mScopeObject = do_GetWeakReference(aScriptGlobalObject);
#ifdef DEBUG
if (!mWillReparent) {
// We really shouldn't have a wrapper here but if we do we need to make sure
// it has the correct parent.
JSObject *obj = GetWrapperPreserveColor();
if (obj) {
JSObject *newScope = aScriptGlobalObject->GetGlobalJSObject();
NS_ASSERTION(js::GetGlobalForObjectCrossCompartment(obj) == newScope,
"Wrong scope, this is really bad!");
}
}
#endif
if (mAllowDNSPrefetch) {
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
if (docShell) {
#ifdef DEBUG
nsCOMPtr<nsIWebNavigation> webNav =
do_GetInterface(aScriptGlobalObject);
NS_ASSERTION(SameCOMIdentity(webNav, docShell),
"Unexpected container or script global?");
#endif
bool allowDNSPrefetch;
docShell->GetAllowDNSPrefetch(&allowDNSPrefetch);
mAllowDNSPrefetch = allowDNSPrefetch;
}
}
MaybeRescheduleAnimationFrameNotifications();
}
// Remember the pointer to our window (or lack there of), to avoid
// having to QI every time it's asked for.
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(mScriptGlobalObject);
mWindow = window;
// Now that we know what our window is, we can flush the CSP errors to the
// Web Console. We are flushing all messages that occured and were stored
// in the queue prior to this point.
nsCOMPtr<nsIContentSecurityPolicy> csp;
NodePrincipal()->GetCsp(getter_AddRefs(csp));
if (csp) {
static_cast<nsCSPContext*>(csp.get())->flushConsoleMessages();
}
nsCOMPtr<nsIHttpChannelInternal> internalChannel =
do_QueryInterface(GetChannel());
if (internalChannel) {
nsCOMArray<nsISecurityConsoleMessage> messages;
internalChannel->TakeAllSecurityMessages(messages);
SendToConsole(messages);
}
// Set our visibility state, but do not fire the event. This is correct
// because either we're coming out of bfcache (in which case IsVisible() will
// still test false at this point and no state change will happen) or we're
// doing the initial document load and don't want to fire the event for this
// change.
dom::VisibilityState oldState = mVisibilityState;
mVisibilityState = GetVisibilityState();
// When the visibility is changed, notify it to observers.
// Some observers need the notification, for example HTMLMediaElement uses
// it to update internal media resource allocation.
// When video is loaded via VideoDocument, HTMLMediaElement and MediaDecoder
// creation are already done before nsDocument::SetScriptGlobalObject() call.
// MediaDecoder decides whether starting decoding is decided based on
// document's visibility. When the MediaDecoder is created,
// nsDocument::SetScriptGlobalObject() is not yet called and document is
// hidden state. Therefore the MediaDecoder decides that decoding is
// not yet necessary. But soon after nsDocument::SetScriptGlobalObject()
// call, the document becomes not hidden. At the time, MediaDecoder needs
// to know it and needs to start updating decoding.
if (oldState != mVisibilityState) {
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
}
// The global in the template contents owner document should be the same.
if (mTemplateContentsOwner && mTemplateContentsOwner != this) {
mTemplateContentsOwner->SetScriptGlobalObject(aScriptGlobalObject);
}
if (!mMaybeServiceWorkerControlled && mDocumentContainer && mScriptGlobalObject && GetChannel()) {
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
uint32_t loadType;
docShell->GetLoadType(&loadType);
// If we are shift-reloaded, don't associate with a ServiceWorker.
if (IsForceReloadType(loadType)) {
NS_WARNING("Page was shift reloaded, skipping ServiceWorker control");
return;
}
nsCOMPtr<nsIServiceWorkerManager> swm = mozilla::services::GetServiceWorkerManager();
if (swm) {
// If this document is being resurrected from the bfcache, then we may
// already have a document ID. In that case reuse the same ID. Otherwise
// get our document ID from the docshell.
nsString documentId(GetId());
if (documentId.IsEmpty()) {
static_cast<nsDocShell*>(docShell.get())->GetInterceptedDocumentId(documentId);
}
swm->MaybeStartControlling(this, documentId);
mMaybeServiceWorkerControlled = true;
}
}
}
nsIScriptGlobalObject*
nsDocument::GetScriptHandlingObjectInternal() const
{
MOZ_ASSERT(!mScriptGlobalObject,
"Do not call this when mScriptGlobalObject is set!");
if (mHasHadDefaultView) {
return nullptr;
}
nsCOMPtr<nsIScriptGlobalObject> scriptHandlingObject =
do_QueryReferent(mScopeObject);
nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(scriptHandlingObject);
if (win) {
nsPIDOMWindowOuter* outer = win->GetOuterWindow();
if (!outer || outer->GetCurrentInnerWindow() != win) {
NS_WARNING("Wrong inner/outer window combination!");
return nullptr;
}
}
return scriptHandlingObject;
}
void
nsDocument::SetScriptHandlingObject(nsIScriptGlobalObject* aScriptObject)
{
NS_ASSERTION(!mScriptGlobalObject ||
mScriptGlobalObject == aScriptObject,
"Wrong script object!");
if (aScriptObject) {
mScopeObject = do_GetWeakReference(aScriptObject);
mHasHadScriptHandlingObject = true;
mHasHadDefaultView = false;
}
}
bool
nsDocument::IsTopLevelContentDocument()
{
return mIsTopLevelContentDocument;
}
void
nsDocument::SetIsTopLevelContentDocument(bool aIsTopLevelContentDocument)
{
mIsTopLevelContentDocument = aIsTopLevelContentDocument;
}
bool
nsDocument::IsContentDocument() const
{
return mIsContentDocument;
}
void
nsDocument::SetIsContentDocument(bool aIsContentDocument)
{
mIsContentDocument = aIsContentDocument;
}
nsPIDOMWindowOuter*
nsDocument::GetWindowInternal() const
{
MOZ_ASSERT(!mWindow, "This should not be called when mWindow is not null!");
// Let's use mScriptGlobalObject. Even if the document is already removed from
// the docshell, the outer window might be still obtainable from the it.
nsCOMPtr<nsPIDOMWindowOuter> win;
if (mRemovedFromDocShell) {
// The docshell returns the outer window we are done.
nsCOMPtr<nsIDocShell> kungFuDeathGrip(mDocumentContainer);
if (kungFuDeathGrip) {
win = kungFuDeathGrip->GetWindow();
}
} else {
if (nsCOMPtr<nsPIDOMWindowInner> inner = do_QueryInterface(mScriptGlobalObject)) {
// mScriptGlobalObject is always the inner window, let's get the outer.
win = inner->GetOuterWindow();
}
}
return win;
}
nsScriptLoader*
nsDocument::ScriptLoader()
{
return mScriptLoader;
}
bool
nsDocument::InternalAllowXULXBL()
{
if (nsContentUtils::AllowXULXBLForPrincipal(NodePrincipal())) {
mAllowXULXBL = eTriTrue;
return true;
}
mAllowXULXBL = eTriFalse;
return false;
}
// Note: We don't hold a reference to the document observer; we assume
// that it has a live reference to the document.
void
nsDocument::AddObserver(nsIDocumentObserver* aObserver)
{
NS_ASSERTION(mObservers.IndexOf(aObserver) == nsTArray<int>::NoIndex,
"Observer already in the list");
mObservers.AppendElement(aObserver);
AddMutationObserver(aObserver);
}
bool
nsDocument::RemoveObserver(nsIDocumentObserver* aObserver)
{
// If we're in the process of destroying the document (and we're
// informing the observers of the destruction), don't remove the
// observers from the list. This is not a big deal, since we
// don't hold a live reference to the observers.
if (!mInDestructor) {
RemoveMutationObserver(aObserver);
return mObservers.RemoveElement(aObserver);
}
return mObservers.Contains(aObserver);
}
void
nsDocument::MaybeEndOutermostXBLUpdate()
{
// Only call BindingManager()->EndOutermostUpdate() when
// we're not in an update and it is safe to run scripts.
if (mUpdateNestLevel == 0 && mInXBLUpdate) {
if (nsContentUtils::IsSafeToRunScript()) {
mInXBLUpdate = false;
BindingManager()->EndOutermostUpdate();
} else if (!mInDestructor) {
if (!mMaybeEndOutermostXBLUpdateRunner) {
mMaybeEndOutermostXBLUpdateRunner =
NewRunnableMethod(this, &nsDocument::MaybeEndOutermostXBLUpdate);
}
nsContentUtils::AddScriptRunner(mMaybeEndOutermostXBLUpdateRunner);
}
}
}
void
nsDocument::BeginUpdate(nsUpdateType aUpdateType)
{
if (mUpdateNestLevel == 0 && !mInXBLUpdate) {
mInXBLUpdate = true;
BindingManager()->BeginOutermostUpdate();
}
++mUpdateNestLevel;
nsContentUtils::AddScriptBlocker();
NS_DOCUMENT_NOTIFY_OBSERVERS(BeginUpdate, (this, aUpdateType));
}
void
nsDocument::EndUpdate(nsUpdateType aUpdateType)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(EndUpdate, (this, aUpdateType));
nsContentUtils::RemoveScriptBlocker();
--mUpdateNestLevel;
// This set of updates may have created XBL bindings. Let the
// binding manager know we're done.
MaybeEndOutermostXBLUpdate();
MaybeInitializeFinalizeFrameLoaders();
}
void
nsDocument::BeginLoad()
{
// Block onload here to prevent having to deal with blocking and
// unblocking it while we know the document is loading.
BlockOnload();
mDidFireDOMContentLoaded = false;
BlockDOMContentLoaded();
if (mScriptLoader) {
mScriptLoader->BeginDeferringScripts();
}
NS_DOCUMENT_NOTIFY_OBSERVERS(BeginLoad, (this));
}
void
nsDocument::ReportEmptyGetElementByIdArg()
{
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"), this,
nsContentUtils::eDOM_PROPERTIES,
"EmptyGetElementByIdParam");
}
Element*
nsDocument::GetElementById(const nsAString& aElementId)
{
if (!CheckGetElementByIdArg(aElementId)) {
return nullptr;
}
nsIdentifierMapEntry *entry = mIdentifierMap.GetEntry(aElementId);
return entry ? entry->GetIdElement() : nullptr;
}
const nsTArray<Element*>*
nsDocument::GetAllElementsForId(const nsAString& aElementId) const
{
if (aElementId.IsEmpty()) {
return nullptr;
}
nsIdentifierMapEntry *entry = mIdentifierMap.GetEntry(aElementId);
return entry ? &entry->GetIdElements() : nullptr;
}
NS_IMETHODIMP
nsDocument::GetElementById(const nsAString& aId, nsIDOMElement** aReturn)
{
Element *content = GetElementById(aId);
if (content) {
return CallQueryInterface(content, aReturn);
}
*aReturn = nullptr;
return NS_OK;
}
Element*
nsDocument::AddIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
void* aData, bool aForImage)
{
nsDependentAtomString id(aID);
if (!CheckGetElementByIdArg(id))
return nullptr;
nsIdentifierMapEntry *entry = mIdentifierMap.PutEntry(id);
NS_ENSURE_TRUE(entry, nullptr);
entry->AddContentChangeCallback(aObserver, aData, aForImage);
return aForImage ? entry->GetImageIdElement() : entry->GetIdElement();
}
void
nsDocument::RemoveIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
void* aData, bool aForImage)
{
nsDependentAtomString id(aID);
if (!CheckGetElementByIdArg(id))
return;
nsIdentifierMapEntry *entry = mIdentifierMap.GetEntry(id);
if (!entry) {
return;
}
entry->RemoveContentChangeCallback(aObserver, aData, aForImage);
}
NS_IMETHODIMP
nsDocument::MozSetImageElement(const nsAString& aImageElementId,
nsIDOMElement* aImageElement)
{
nsCOMPtr<Element> el = do_QueryInterface(aImageElement);
MozSetImageElement(aImageElementId, el);
return NS_OK;
}
void
nsDocument::MozSetImageElement(const nsAString& aImageElementId,
Element* aElement)
{
if (aImageElementId.IsEmpty())
return;
// Hold a script blocker while calling SetImageElement since that can call
// out to id-observers
nsAutoScriptBlocker scriptBlocker;
nsIdentifierMapEntry *entry = mIdentifierMap.PutEntry(aImageElementId);
if (entry) {
entry->SetImageElement(aElement);
if (entry->IsEmpty()) {
mIdentifierMap.RemoveEntry(entry);
}
}
}
Element*
nsDocument::LookupImageElement(const nsAString& aId)
{
if (aId.IsEmpty())
return nullptr;
nsIdentifierMapEntry *entry = mIdentifierMap.GetEntry(aId);
return entry ? entry->GetImageIdElement() : nullptr;
}
void
nsDocument::DispatchContentLoadedEvents()
{
// If you add early returns from this method, make sure you're
// calling UnblockOnload properly.
// Unpin references to preloaded images
mPreloadingImages.Clear();
// DOM manipulation after content loaded should not care if the element
// came from the preloader.
mPreloadedPreconnects.Clear();
if (mTiming) {
mTiming->NotifyDOMContentLoadedStart(nsIDocument::GetDocumentURI());
}
// Dispatch observer notification to notify observers document is interactive.
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
nsIPrincipal *principal = GetPrincipal();
os->NotifyObservers(static_cast<nsIDocument*>(this),
nsContentUtils::IsSystemPrincipal(principal) ?
"chrome-document-interactive" :
"content-document-interactive",
nullptr);
}
// Fire a DOM event notifying listeners that this document has been
// loaded (excluding images and other loads initiated by this
// document).
nsContentUtils::DispatchTrustedEvent(this, static_cast<nsIDocument*>(this),
NS_LITERAL_STRING("DOMContentLoaded"),
true, false);
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
nsIDocShell* docShell = this->GetDocShell();
if (timelines && timelines->HasConsumer(docShell)) {
timelines->AddMarkerForDocShell(docShell,
MakeUnique<DocLoadingTimelineMarker>("document::DOMContentLoaded"));
}
if (mTiming) {
mTiming->NotifyDOMContentLoadedEnd(nsIDocument::GetDocumentURI());
}
// If this document is a [i]frame, fire a DOMFrameContentLoaded
// event on all parent documents notifying that the HTML (excluding
// other external files such as images and stylesheets) in a frame
// has finished loading.
// target_frame is the [i]frame element that will be used as the
// target for the event. It's the [i]frame whose content is done
// loading.
nsCOMPtr<EventTarget> target_frame;
if (mParentDocument) {
target_frame = mParentDocument->FindContentForSubDocument(this);
}
if (target_frame) {
nsCOMPtr<nsIDocument> parent = mParentDocument;
do {
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(parent);
nsCOMPtr<nsIDOMEvent> event;
if (domDoc) {
domDoc->CreateEvent(NS_LITERAL_STRING("Events"),
getter_AddRefs(event));
}
if (event) {
event->InitEvent(NS_LITERAL_STRING("DOMFrameContentLoaded"), true,
true);
event->SetTarget(target_frame);
event->SetTrusted(true);
// To dispatch this event we must manually call
// EventDispatcher::Dispatch() on the ancestor document since the
// target is not in the same document, so the event would never reach
// the ancestor document if we used the normal event
// dispatching code.
WidgetEvent* innerEvent = event->WidgetEventPtr();
if (innerEvent) {
nsEventStatus status = nsEventStatus_eIgnore;
nsIPresShell *shell = parent->GetShell();
if (shell) {
RefPtr<nsPresContext> context = shell->GetPresContext();
if (context) {
EventDispatcher::Dispatch(parent, context, innerEvent, event,
&status);
}
}
}
}
parent = parent->GetParentDocument();
} while (parent);
}
// If the document has a manifest attribute, fire a MozApplicationManifest
// event.
Element* root = GetRootElement();
if (root && root->HasAttr(kNameSpaceID_None, nsGkAtoms::manifest)) {
nsContentUtils::DispatchChromeEvent(this, static_cast<nsIDocument*>(this),
NS_LITERAL_STRING("MozApplicationManifest"),
true, true);
}
if (mMaybeServiceWorkerControlled) {
using mozilla::dom::workers::ServiceWorkerManager;
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm) {
swm->MaybeCheckNavigationUpdate(this);
}
}
UnblockOnload(true);
}
void
nsDocument::EndLoad()
{
// Drop the ref to our parser, if any, but keep hold of the sink so that we
// can flush it from FlushPendingNotifications as needed. We might have to
// do that to get a StartLayout() to happen.
if (mParser) {
mWeakSink = do_GetWeakReference(mParser->GetContentSink());
mParser = nullptr;
}
NS_DOCUMENT_NOTIFY_OBSERVERS(EndLoad, (this));
UnblockDOMContentLoaded();
}
void
nsDocument::UnblockDOMContentLoaded()
{
MOZ_ASSERT(mBlockDOMContentLoaded);
if (--mBlockDOMContentLoaded != 0 || mDidFireDOMContentLoaded) {
return;
}
mDidFireDOMContentLoaded = true;
MOZ_ASSERT(mReadyState == READYSTATE_INTERACTIVE);
if (!mSynchronousDOMContentLoaded) {
nsCOMPtr<nsIRunnable> ev =
NewRunnableMethod(this, &nsDocument::DispatchContentLoadedEvents);
NS_DispatchToCurrentThread(ev);
} else {
DispatchContentLoadedEvents();
}
}
void
nsDocument::ContentStateChanged(nsIContent* aContent, EventStates aStateMask)
{
NS_PRECONDITION(!nsContentUtils::IsSafeToRunScript(),
"Someone forgot a scriptblocker");
NS_DOCUMENT_NOTIFY_OBSERVERS(ContentStateChanged,
(this, aContent, aStateMask));
}
void
nsDocument::DocumentStatesChanged(EventStates aStateMask)
{
// Invalidate our cached state.
mGotDocumentState &= ~aStateMask;
mDocumentState &= ~aStateMask;
NS_DOCUMENT_NOTIFY_OBSERVERS(DocumentStatesChanged, (this, aStateMask));
}
void
nsDocument::StyleRuleChanged(StyleSheet* aSheet,
css::Rule* aStyleRule)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleRuleChanged, (aSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleRuleChangeEvent,
"StyleRuleChanged",
mRule,
aStyleRule ? aStyleRule->GetDOMRule() : nullptr);
}
}
void
nsDocument::StyleRuleAdded(StyleSheet* aSheet,
css::Rule* aStyleRule)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleRuleAdded, (aSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleRuleChangeEvent,
"StyleRuleAdded",
mRule,
aStyleRule ? aStyleRule->GetDOMRule()
: nullptr);
}
}
void
nsDocument::StyleRuleRemoved(StyleSheet* aSheet,
css::Rule* aStyleRule)
{
NS_DOCUMENT_NOTIFY_OBSERVERS(StyleRuleRemoved, (aSheet));
if (StyleSheetChangeEventsEnabled()) {
DO_STYLESHEET_NOTIFICATION(StyleRuleChangeEvent,
"StyleRuleRemoved",
mRule,
aStyleRule ? aStyleRule->GetDOMRule()
: nullptr);
}
}
#undef DO_STYLESHEET_NOTIFICATION
already_AddRefed<AnonymousContent>
nsIDocument::InsertAnonymousContent(Element& aElement, ErrorResult& aRv)
{
nsIPresShell* shell = GetShell();
if (!shell || !shell->GetCanvasFrame()) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsAutoScriptBlocker scriptBlocker;
nsCOMPtr<Element> container = shell->GetCanvasFrame()
->GetCustomContentContainer();
if (!container) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
// Clone the node to avoid returning a direct reference
nsCOMPtr<nsINode> clonedElement = aElement.CloneNode(true, aRv);
if (aRv.Failed()) {
return nullptr;
}
// Insert the element into the container
nsresult rv;
rv = container->AppendChildTo(clonedElement->AsContent(), true);
if (NS_FAILED(rv)) {
return nullptr;
}
RefPtr<AnonymousContent> anonymousContent =
new AnonymousContent(clonedElement->AsElement());
mAnonymousContents.AppendElement(anonymousContent);
shell->GetCanvasFrame()->ShowCustomContentContainer();
return anonymousContent.forget();
}
void
nsIDocument::RemoveAnonymousContent(AnonymousContent& aContent,
ErrorResult& aRv)
{
nsIPresShell* shell = GetShell();
if (!shell || !shell->GetCanvasFrame()) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
nsAutoScriptBlocker scriptBlocker;
nsCOMPtr<Element> container = shell->GetCanvasFrame()
->GetCustomContentContainer();
if (!container) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return;
}
// Iterate over mAnonymousContents to find and remove the given node.
for (size_t i = 0, len = mAnonymousContents.Length(); i < len; ++i) {
if (mAnonymousContents[i] == &aContent) {
// Get the node from the customContent
nsCOMPtr<Element> node = aContent.GetContentNode();
// Remove the entry in mAnonymousContents
mAnonymousContents.RemoveElementAt(i);
// Remove the node from its container
container->RemoveChild(*node, aRv);
if (aRv.Failed()) {
return;
}
break;
}
}
if (mAnonymousContents.IsEmpty()) {
shell->GetCanvasFrame()->HideCustomContentContainer();
}
}
Element*
nsIDocument::GetAnonRootIfInAnonymousContentContainer(nsINode* aNode) const
{
if (!aNode->IsInNativeAnonymousSubtree()) {
return nullptr;
}
nsIPresShell* shell = GetShell();
if (!shell || !shell->GetCanvasFrame()) {
return nullptr;
}
nsAutoScriptBlocker scriptBlocker;
nsCOMPtr<Element> customContainer = shell->GetCanvasFrame()
->GetCustomContentContainer();
if (!customContainer) {
return nullptr;
}
// An arbitrary number of elements can be inserted as children of the custom
// container frame. We want the one that was added that contains aNode, so
// we need to keep track of the last child separately using |child| here.
nsINode* child = aNode;
nsINode* parent = aNode->GetParentNode();
while (parent && parent->IsInNativeAnonymousSubtree()) {
if (parent == customContainer) {
return child->IsElement() ? child->AsElement() : nullptr;
}
child = parent;
parent = child->GetParentNode();
}
return nullptr;
}
//
// nsIDOMDocument interface
//
DocumentType*
nsIDocument::GetDoctype() const
{
for (nsIContent* child = GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->NodeType() == nsIDOMNode::DOCUMENT_TYPE_NODE) {
return static_cast<DocumentType*>(child);
}
}
return nullptr;
}
NS_IMETHODIMP
nsDocument::GetDoctype(nsIDOMDocumentType** aDoctype)
{
MOZ_ASSERT(aDoctype);
nsCOMPtr<nsIDOMDocumentType> doctype = nsIDocument::GetDoctype();
doctype.forget(aDoctype);
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetImplementation(nsIDOMDOMImplementation** aImplementation)
{
ErrorResult rv;
*aImplementation = GetImplementation(rv);
if (rv.Failed()) {
MOZ_ASSERT(!*aImplementation);
return rv.StealNSResult();
}
NS_ADDREF(*aImplementation);
return NS_OK;
}
DOMImplementation*
nsDocument::GetImplementation(ErrorResult& rv)
{
if (!mDOMImplementation) {
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank");
if (!uri) {
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return nullptr;
}
bool hasHadScriptObject = true;
nsIScriptGlobalObject* scriptObject =
GetScriptHandlingObject(hasHadScriptObject);
if (!scriptObject && hasHadScriptObject) {
rv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
mDOMImplementation = new DOMImplementation(this,
scriptObject ? scriptObject : GetScopeObject(), uri, uri);
}
return mDOMImplementation;
}
NS_IMETHODIMP
nsDocument::GetDocumentElement(nsIDOMElement** aDocumentElement)
{
NS_ENSURE_ARG_POINTER(aDocumentElement);
Element* root = GetRootElement();
if (root) {
return CallQueryInterface(root, aDocumentElement);
}
*aDocumentElement = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsDocument::CreateElement(const nsAString& aTagName,
nsIDOMElement** aReturn)
{
*aReturn = nullptr;
ErrorResult rv;
ElementCreationOptionsOrString options;
options.SetAsString();
nsCOMPtr<Element> element = CreateElement(aTagName, options, rv);
NS_ENSURE_FALSE(rv.Failed(), rv.StealNSResult());
return CallQueryInterface(element, aReturn);
}
bool IsLowercaseASCII(const nsAString& aValue)
{
int32_t len = aValue.Length();
for (int32_t i = 0; i < len; ++i) {
char16_t c = aValue[i];
if (!(0x0061 <= (c) && ((c) <= 0x007a))) {
return false;
}
}
return true;
}
already_AddRefed<mozilla::dom::CustomElementsRegistry>
nsDocument::GetCustomElementsRegistry()
{
nsAutoString contentType;
GetContentType(contentType);
if (!IsHTMLDocument() &&
!contentType.EqualsLiteral("application/xhtml+xml")) {
return nullptr;
}
nsCOMPtr<nsPIDOMWindowInner> window(
do_QueryInterface(mScriptGlobalObject ? mScriptGlobalObject
: GetScopeObject()));
if (!window) {
return nullptr;
}
RefPtr<CustomElementsRegistry> registry = window->CustomElements();
if (!registry) {
return nullptr;
}
return registry.forget();
}
already_AddRefed<Element>
nsDocument::CreateElement(const nsAString& aTagName,
const ElementCreationOptionsOrString& aOptions,
ErrorResult& rv)
{
rv = nsContentUtils::CheckQName(aTagName, false);
if (rv.Failed()) {
return nullptr;
}
bool needsLowercase = IsHTMLDocument() && !IsLowercaseASCII(aTagName);
nsAutoString lcTagName;
if (needsLowercase) {
nsContentUtils::ASCIIToLower(aTagName, lcTagName);
}
const nsString* is = nullptr;
if (aOptions.IsElementCreationOptions()) {
// Throw NotFoundError if 'is' is not-null and definition is null
is = CheckCustomElementName(aOptions.GetAsElementCreationOptions(),
needsLowercase ? lcTagName : aTagName, mDefaultElementType, rv);
if (rv.Failed()) {
return nullptr;
}
}
RefPtr<Element> elem = CreateElem(
needsLowercase ? lcTagName : aTagName, nullptr, mDefaultElementType, is);
return elem.forget();
}
NS_IMETHODIMP
nsDocument::CreateElementNS(const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
nsIDOMElement** aReturn)
{
*aReturn = nullptr;
ElementCreationOptions options;
ErrorResult rv;
nsCOMPtr<Element> element =
CreateElementNS(aNamespaceURI, aQualifiedName, options, rv);
NS_ENSURE_FALSE(rv.Failed(), rv.StealNSResult());
return CallQueryInterface(element, aReturn);
}
already_AddRefed<Element>
nsDocument::CreateElementNS(const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
const ElementCreationOptions& aOptions,
ErrorResult& rv)
{
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
rv = nsContentUtils::GetNodeInfoFromQName(aNamespaceURI,
aQualifiedName,
mNodeInfoManager,
nsIDOMNode::ELEMENT_NODE,
getter_AddRefs(nodeInfo));
if (rv.Failed()) {
return nullptr;
}
// Throw NotFoundError if 'is' is not-null and definition is null
const nsString* is = CheckCustomElementName(
aOptions, aQualifiedName, nodeInfo->NamespaceID(), rv);
if (rv.Failed()) {
return nullptr;
}
nsCOMPtr<Element> element;
rv = NS_NewElement(getter_AddRefs(element), nodeInfo.forget(),
NOT_FROM_PARSER, is);
if (rv.Failed()) {
return nullptr;
}
return element.forget();
}
NS_IMETHODIMP
nsDocument::CreateTextNode(const nsAString& aData, nsIDOMText** aReturn)
{
*aReturn = nsIDocument::CreateTextNode(aData).take();
return NS_OK;
}
already_AddRefed<nsTextNode>
nsIDocument::CreateTextNode(const nsAString& aData) const
{
RefPtr<nsTextNode> text = new nsTextNode(mNodeInfoManager);
// Don't notify; this node is still being created.
text->SetText(aData, false);
return text.forget();
}
NS_IMETHODIMP
nsDocument::CreateDocumentFragment(nsIDOMDocumentFragment** aReturn)
{
*aReturn = nsIDocument::CreateDocumentFragment().take();
return NS_OK;
}
already_AddRefed<DocumentFragment>
nsIDocument::CreateDocumentFragment() const
{
RefPtr<DocumentFragment> frag = new DocumentFragment(mNodeInfoManager);
return frag.forget();
}
NS_IMETHODIMP
nsDocument::CreateComment(const nsAString& aData, nsIDOMComment** aReturn)
{
*aReturn = nsIDocument::CreateComment(aData).take();
return NS_OK;
}
// Unfortunately, bareword "Comment" is ambiguous with some Mac system headers.
already_AddRefed<dom::Comment>
nsIDocument::CreateComment(const nsAString& aData) const
{
RefPtr<dom::Comment> comment = new dom::Comment(mNodeInfoManager);
// Don't notify; this node is still being created.
comment->SetText(aData, false);
return comment.forget();
}
NS_IMETHODIMP
nsDocument::CreateCDATASection(const nsAString& aData,
nsIDOMCDATASection** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
ErrorResult rv;
*aReturn = nsIDocument::CreateCDATASection(aData, rv).take();
return rv.StealNSResult();
}
already_AddRefed<CDATASection>
nsIDocument::CreateCDATASection(const nsAString& aData,
ErrorResult& rv)
{
if (IsHTMLDocument()) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
if (FindInReadable(NS_LITERAL_STRING("]]>"), aData)) {
rv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
return nullptr;
}
RefPtr<CDATASection> cdata = new CDATASection(mNodeInfoManager);
// Don't notify; this node is still being created.
cdata->SetText(aData, false);
return cdata.forget();
}
NS_IMETHODIMP
nsDocument::CreateProcessingInstruction(const nsAString& aTarget,
const nsAString& aData,
nsIDOMProcessingInstruction** aReturn)
{
ErrorResult rv;
*aReturn =
nsIDocument::CreateProcessingInstruction(aTarget, aData, rv).take();
return rv.StealNSResult();
}
already_AddRefed<ProcessingInstruction>
nsIDocument::CreateProcessingInstruction(const nsAString& aTarget,
const nsAString& aData,
ErrorResult& rv) const
{
nsresult res = nsContentUtils::CheckQName(aTarget, false);
if (NS_FAILED(res)) {
rv.Throw(res);
return nullptr;
}
if (FindInReadable(NS_LITERAL_STRING("?>"), aData)) {
rv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
return nullptr;
}
RefPtr<ProcessingInstruction> pi =
NS_NewXMLProcessingInstruction(mNodeInfoManager, aTarget, aData);
return pi.forget();
}
NS_IMETHODIMP
nsDocument::CreateAttribute(const nsAString& aName,
nsIDOMAttr** aReturn)
{
ErrorResult rv;
*aReturn = nsIDocument::CreateAttribute(aName, rv).take();
return rv.StealNSResult();
}
already_AddRefed<Attr>
nsIDocument::CreateAttribute(const nsAString& aName, ErrorResult& rv)
{
WarnOnceAbout(eCreateAttribute);
if (!mNodeInfoManager) {
rv.Throw(NS_ERROR_NOT_INITIALIZED);
return nullptr;
}
nsresult res = nsContentUtils::CheckQName(aName, false);
if (NS_FAILED(res)) {
rv.Throw(res);
return nullptr;
}
nsAutoString name;
if (IsHTMLDocument()) {
nsContentUtils::ASCIIToLower(aName, name);
} else {
name = aName;
}
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
res = mNodeInfoManager->GetNodeInfo(name, nullptr, kNameSpaceID_None,
nsIDOMNode::ATTRIBUTE_NODE,
getter_AddRefs(nodeInfo));
if (NS_FAILED(res)) {
rv.Throw(res);
return nullptr;
}
RefPtr<Attr> attribute = new Attr(nullptr, nodeInfo.forget(),
EmptyString());
return attribute.forget();
}
NS_IMETHODIMP
nsDocument::CreateAttributeNS(const nsAString & aNamespaceURI,
const nsAString & aQualifiedName,
nsIDOMAttr **aResult)
{
ErrorResult rv;
*aResult =
nsIDocument::CreateAttributeNS(aNamespaceURI, aQualifiedName, rv).take();
return rv.StealNSResult();
}
already_AddRefed<Attr>
nsIDocument::CreateAttributeNS(const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
ErrorResult& rv)
{
WarnOnceAbout(eCreateAttributeNS);
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
rv = nsContentUtils::GetNodeInfoFromQName(aNamespaceURI,
aQualifiedName,
mNodeInfoManager,
nsIDOMNode::ATTRIBUTE_NODE,
getter_AddRefs(nodeInfo));
if (rv.Failed()) {
return nullptr;
}
RefPtr<Attr> attribute = new Attr(nullptr, nodeInfo.forget(),
EmptyString());
return attribute.forget();
}
bool
nsDocument::CustomElementConstructor(JSContext* aCx, unsigned aArgc, JS::Value* aVp)
{
JS::CallArgs args = JS::CallArgsFromVp(aArgc, aVp);
JS::Rooted<JSObject*> global(aCx,
JS_GetGlobalForObject(aCx, &args.callee()));
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryWrapper(aCx, global);
MOZ_ASSERT(window, "Should have a non-null window");
nsDocument* document = static_cast<nsDocument*>(window->GetDoc());
// Function name is the type of the custom element.
JSString* jsFunName =
JS_GetFunctionId(JS_ValueToFunction(aCx, args.calleev()));
nsAutoJSString elemName;
if (!elemName.init(aCx, jsFunName)) {
return true;
}
RefPtr<mozilla::dom::CustomElementsRegistry> registry = window->CustomElements();
if (!registry) {
return true;
}
nsCOMPtr<nsIAtom> typeAtom(NS_Atomize(elemName));
CustomElementDefinition* definition = registry->mCustomDefinitions.Get(typeAtom);
if (!definition) {
return true;
}
nsDependentAtomString localName(definition->mLocalName);
nsCOMPtr<Element> element =
document->CreateElem(localName, nullptr, kNameSpaceID_XHTML);
NS_ENSURE_TRUE(element, true);
if (definition->mLocalName != typeAtom) {
// This element is a custom element by extension, thus we need to
// do some special setup. For non-extended custom elements, this happens
// when the element is created.
nsContentUtils::SetupCustomElement(element, &elemName);
}
nsresult rv = nsContentUtils::WrapNative(aCx, element, element, args.rval());
NS_ENSURE_SUCCESS(rv, true);
return true;
}
bool
nsDocument::IsWebComponentsEnabled(JSContext* aCx, JSObject* aObject)
{
JS::Rooted<JSObject*> obj(aCx, aObject);
if (Preferences::GetBool("dom.webcomponents.enabled")) {
return true;
}
// Check for the webcomponents permission. See Bug 1181555.
JSAutoCompartment ac(aCx, obj);
JS::Rooted<JSObject*> global(aCx, JS_GetGlobalForObject(aCx, obj));
nsCOMPtr<nsPIDOMWindowInner> window =
do_QueryInterface(nsJSUtils::GetStaticScriptGlobal(global));
if (window) {
nsresult rv;
nsCOMPtr<nsIPermissionManager> permMgr =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, false);
uint32_t perm;
rv = permMgr->TestPermissionFromWindow(
window, "moz-extremely-unstable-and-will-change-webcomponents", &perm);
NS_ENSURE_SUCCESS(rv, false);
return perm == nsIPermissionManager::ALLOW_ACTION;
}
return false;
}
void
nsDocument::RegisterElement(JSContext* aCx, const nsAString& aType,
const ElementRegistrationOptions& aOptions,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& rv)
{
RefPtr<CustomElementsRegistry> registry(GetCustomElementsRegistry());
if (!registry) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
// Unconditionally convert TYPE to lowercase.
nsAutoString lcType;
nsContentUtils::ASCIIToLower(aType, lcType);
nsIGlobalObject* sgo = GetScopeObject();
if (!sgo) {
rv.Throw(NS_ERROR_UNEXPECTED);
return;
}
JS::Rooted<JSObject*> global(aCx, sgo->GetGlobalJSObject());
JS::Rooted<JSObject*> protoObject(aCx);
if (!aOptions.mPrototype) {
JS::Rooted<JSObject*> htmlProto(aCx);
htmlProto = HTMLElementBinding::GetProtoObjectHandle(aCx);
if (!htmlProto) {
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
protoObject = JS_NewObjectWithGivenProto(aCx, nullptr, htmlProto);
if (!protoObject) {
rv.Throw(NS_ERROR_UNEXPECTED);
return;
}
} else {
protoObject = aOptions.mPrototype;
// Get the unwrapped prototype to do some checks.
JS::Rooted<JSObject*> protoObjectUnwrapped(aCx, js::CheckedUnwrap(protoObject));
if (!protoObjectUnwrapped) {
// If the caller's compartment does not have permission to access the
// unwrapped prototype then throw.
rv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
// If PROTOTYPE is already an interface prototype object for any interface
// object or PROTOTYPE has a non-configurable property named constructor,
// throw a NotSupportedError and stop.
const js::Class* clasp = js::GetObjectClass(protoObjectUnwrapped);
if (IsDOMIfaceAndProtoClass(clasp)) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
JS::Rooted<JS::PropertyDescriptor> descRoot(aCx);
JS::MutableHandle<JS::PropertyDescriptor> desc(&descRoot);
// This check may go through a wrapper, but as we checked above
// it should be transparent or an xray. This should be fine for now,
// until the spec is sorted out.
if (!JS_GetPropertyDescriptor(aCx, protoObject, "constructor", desc)) {
rv.Throw(NS_ERROR_UNEXPECTED);
return;
}
if (!desc.configurable()) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
}
JS::Rooted<JSFunction*> constructor(aCx);
{
// Go into the document's global compartment when creating the constructor
// function because we want to get the correct document (where the
// definition is registered) when it is called.
JSAutoCompartment ac(aCx, global);
// Create constructor to return. Store the name of the custom element as the
// name of the function.
constructor = JS_NewFunction(aCx, nsDocument::CustomElementConstructor, 0,
JSFUN_CONSTRUCTOR,
NS_ConvertUTF16toUTF8(lcType).get());
if (!constructor) {
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
}
JS::Rooted<JSObject*> wrappedConstructor(aCx);
wrappedConstructor = JS_GetFunctionObject(constructor);
if (!JS_WrapObject(aCx, &wrappedConstructor)) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
if (!JS_LinkConstructorAndPrototype(aCx, wrappedConstructor, protoObject)) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
ElementDefinitionOptions options;
if (!aOptions.mExtends.IsVoid()) {
// Only convert NAME to lowercase in HTML documents.
nsAutoString lcName;
IsHTMLDocument() ? nsContentUtils::ASCIIToLower(aOptions.mExtends, lcName)
: lcName.Assign(aOptions.mExtends);
options.mExtends.Construct(lcName);
}
RootedCallback<OwningNonNull<binding_detail::FastFunction>> functionConstructor(aCx);
functionConstructor = new binding_detail::FastFunction(aCx, wrappedConstructor, sgo);
registry->Define(lcType, functionConstructor, options, rv);
aRetval.set(wrappedConstructor);
}
NS_IMETHODIMP
nsDocument::GetElementsByTagName(const nsAString& aTagname,
nsIDOMNodeList** aReturn)
{
RefPtr<nsContentList> list = GetElementsByTagName(aTagname);
NS_ENSURE_TRUE(list, NS_ERROR_OUT_OF_MEMORY);
// transfer ref to aReturn
list.forget(aReturn);
return NS_OK;
}
long
nsDocument::BlockedTrackingNodeCount() const
{
return mBlockedTrackingNodes.Length();
}
already_AddRefed<nsSimpleContentList>
nsDocument::BlockedTrackingNodes() const
{
RefPtr<nsSimpleContentList> list = new nsSimpleContentList(nullptr);
nsTArray<nsWeakPtr> blockedTrackingNodes;
blockedTrackingNodes = mBlockedTrackingNodes;
for (unsigned long i = 0; i < blockedTrackingNodes.Length(); i++) {
nsWeakPtr weakNode = blockedTrackingNodes[i];
nsCOMPtr<nsIContent> node = do_QueryReferent(weakNode);
// Consider only nodes to which we have managed to get strong references.
// Coping with nullptrs since it's expected for nodes to disappear when
// nobody else is referring to them.
if (node) {
list->AppendElement(node);
}
}
return list.forget();
}
already_AddRefed<nsContentList>
nsIDocument::GetElementsByTagNameNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName,
ErrorResult& aResult)
{
int32_t nameSpaceId = kNameSpaceID_Wildcard;
if (!aNamespaceURI.EqualsLiteral("*")) {
aResult =
nsContentUtils::NameSpaceManager()->RegisterNameSpace(aNamespaceURI,
nameSpaceId);
if (aResult.Failed()) {
return nullptr;
}
}
NS_ASSERTION(nameSpaceId != kNameSpaceID_Unknown, "Unexpected namespace ID!");
return NS_GetContentList(this, nameSpaceId, aLocalName);
}
NS_IMETHODIMP
nsDocument::GetElementsByTagNameNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName,
nsIDOMNodeList** aReturn)
{
ErrorResult rv;
RefPtr<nsContentList> list =
nsIDocument::GetElementsByTagNameNS(aNamespaceURI, aLocalName, rv);
if (rv.Failed()) {
return rv.StealNSResult();
}
// transfer ref to aReturn
list.forget(aReturn);
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetStyleSheets(nsIDOMStyleSheetList** aStyleSheets)
{
NS_ADDREF(*aStyleSheets = StyleSheets());
return NS_OK;
}
StyleSheetList*
nsDocument::StyleSheets()
{
if (!mDOMStyleSheets) {
mDOMStyleSheets = new nsDOMStyleSheetList(this);
}
return mDOMStyleSheets;
}
NS_IMETHODIMP
nsDocument::GetMozSelectedStyleSheetSet(nsAString& aSheetSet)
{
nsIDocument::GetSelectedStyleSheetSet(aSheetSet);
return NS_OK;
}
void
nsIDocument::GetSelectedStyleSheetSet(nsAString& aSheetSet)
{
aSheetSet.Truncate();
// Look through our sheets, find the selected set title
int32_t count = GetNumberOfStyleSheets();
nsAutoString title;
for (int32_t index = 0; index < count; index++) {
StyleSheet* sheet = GetStyleSheetAt(index);
NS_ASSERTION(sheet, "Null sheet in sheet list!");
// XXXheycam Make this work with ServoStyleSheets.
if (sheet->IsServo()) {
NS_ERROR("stylo: can't handle alternate ServoStyleSheets yet");
continue;
}
bool disabled;
sheet->AsGecko()->GetDisabled(&disabled);
if (disabled) {
// Disabled sheets don't affect the currently selected set
continue;
}
sheet->AsGecko()->GetTitle(title);
if (aSheetSet.IsEmpty()) {
aSheetSet = title;
} else if (!title.IsEmpty() && !aSheetSet.Equals(title)) {
// Sheets from multiple sets enabled; return null string, per spec.
SetDOMStringToNull(aSheetSet);
return;
}
}
}
NS_IMETHODIMP
nsDocument::SetMozSelectedStyleSheetSet(const nsAString& aSheetSet)
{
SetSelectedStyleSheetSet(aSheetSet);
return NS_OK;
}
void
nsDocument::SetSelectedStyleSheetSet(const nsAString& aSheetSet)
{
if (DOMStringIsNull(aSheetSet)) {
return;
}
// Must update mLastStyleSheetSet before doing anything else with stylesheets
// or CSSLoaders.
mLastStyleSheetSet = aSheetSet;
EnableStyleSheetsForSetInternal(aSheetSet, true);
}
NS_IMETHODIMP
nsDocument::GetLastStyleSheetSet(nsAString& aSheetSet)
{
nsString sheetSet;
GetLastStyleSheetSet(sheetSet);
aSheetSet = sheetSet;
return NS_OK;
}
void
nsDocument::GetLastStyleSheetSet(nsString& aSheetSet)
{
aSheetSet = mLastStyleSheetSet;
}
NS_IMETHODIMP
nsDocument::GetPreferredStyleSheetSet(nsAString& aSheetSet)
{
nsIDocument::GetPreferredStyleSheetSet(aSheetSet);
return NS_OK;
}
void
nsIDocument::GetPreferredStyleSheetSet(nsAString& aSheetSet)
{
GetHeaderData(nsGkAtoms::headerDefaultStyle, aSheetSet);
}
NS_IMETHODIMP
nsDocument::GetStyleSheetSets(nsISupports** aList)
{
NS_ADDREF(*aList = StyleSheetSets());
return NS_OK;
}
DOMStringList*
nsDocument::StyleSheetSets()
{
if (!mStyleSheetSetList) {
mStyleSheetSetList = new nsDOMStyleSheetSetList(this);
}
return mStyleSheetSetList;
}
NS_IMETHODIMP
nsDocument::MozEnableStyleSheetsForSet(const nsAString& aSheetSet)
{
EnableStyleSheetsForSet(aSheetSet);
return NS_OK;
}
void
nsDocument::EnableStyleSheetsForSet(const nsAString& aSheetSet)
{
// Per spec, passing in null is a no-op.
if (!DOMStringIsNull(aSheetSet)) {
// Note: must make sure to not change the CSSLoader's preferred sheet --
// that value should be equal to either our lastStyleSheetSet (if that's
// non-null) or to our preferredStyleSheetSet. And this method doesn't
// change either of those.
EnableStyleSheetsForSetInternal(aSheetSet, false);
}
}
void
nsDocument::EnableStyleSheetsForSetInternal(const nsAString& aSheetSet,
bool aUpdateCSSLoader)
{
BeginUpdate(UPDATE_STYLE);
int32_t count = GetNumberOfStyleSheets();
nsAutoString title;
for (int32_t index = 0; index < count; index++) {
StyleSheet* sheet = GetStyleSheetAt(index);
NS_ASSERTION(sheet, "Null sheet in sheet list!");
// XXXheycam Make this work with ServoStyleSheets.
if (sheet->IsServo()) {
NS_ERROR("stylo: can't handle alternate ServoStyleSheets yet");
continue;
}
sheet->AsGecko()->GetTitle(title);
if (!title.IsEmpty()) {
sheet->AsGecko()->SetEnabled(title.Equals(aSheetSet));
}
}
if (aUpdateCSSLoader) {
CSSLoader()->SetPreferredSheet(aSheetSet);
}
EndUpdate(UPDATE_STYLE);
}
NS_IMETHODIMP
nsDocument::GetCharacterSet(nsAString& aCharacterSet)
{
nsIDocument::GetCharacterSet(aCharacterSet);
return NS_OK;
}
void
nsIDocument::GetCharacterSet(nsAString& aCharacterSet) const
{
CopyASCIItoUTF16(GetDocumentCharacterSet(), aCharacterSet);
}
NS_IMETHODIMP
nsDocument::ImportNode(nsIDOMNode* aImportedNode,
bool aDeep,
uint8_t aArgc,
nsIDOMNode** aResult)
{
if (aArgc == 0) {
aDeep = true;
}
*aResult = nullptr;
nsCOMPtr<nsINode> imported = do_QueryInterface(aImportedNode);
NS_ENSURE_TRUE(imported, NS_ERROR_UNEXPECTED);
ErrorResult rv;
nsCOMPtr<nsINode> result = nsIDocument::ImportNode(*imported, aDeep, rv);
if (rv.Failed()) {
return rv.StealNSResult();
}
NS_ADDREF(*aResult = result->AsDOMNode());
return NS_OK;
}
already_AddRefed<nsINode>
nsIDocument::ImportNode(nsINode& aNode, bool aDeep, ErrorResult& rv) const
{
nsINode* imported = &aNode;
switch (imported->NodeType()) {
case nsIDOMNode::DOCUMENT_NODE:
{
break;
}
case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
{
if (ShadowRoot::FromNode(imported)) {
break;
}
MOZ_FALLTHROUGH;
}
case nsIDOMNode::ATTRIBUTE_NODE:
case nsIDOMNode::ELEMENT_NODE:
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
case nsIDOMNode::TEXT_NODE:
case nsIDOMNode::CDATA_SECTION_NODE:
case nsIDOMNode::COMMENT_NODE:
case nsIDOMNode::DOCUMENT_TYPE_NODE:
{
nsCOMPtr<nsINode> newNode;
nsCOMArray<nsINode> nodesWithProperties;
rv = nsNodeUtils::Clone(imported, aDeep, mNodeInfoManager,
nodesWithProperties, getter_AddRefs(newNode));
if (rv.Failed()) {
return nullptr;
}
return newNode.forget();
}
default:
{
NS_WARNING("Don't know how to clone this nodetype for importNode.");
}
}
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
NS_IMETHODIMP
nsDocument::LoadBindingDocument(const nsAString& aURI)
{
ErrorResult rv;
nsIDocument::LoadBindingDocument(aURI,
nsContentUtils::GetCurrentJSContext()
? Some(nsContentUtils::SubjectPrincipal())
: Nothing(),
rv);
return rv.StealNSResult();
}
void
nsIDocument::LoadBindingDocument(const nsAString& aURI,
nsIPrincipal& aSubjectPrincipal,
ErrorResult& rv)
{
LoadBindingDocument(aURI, Some(&aSubjectPrincipal), rv);
}
void
nsIDocument::LoadBindingDocument(const nsAString& aURI,
const Maybe<nsIPrincipal*>& aSubjectPrincipal,
ErrorResult& rv)
{
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), aURI,
mCharacterSet.get(),
GetDocBaseURI());
if (rv.Failed()) {
return;
}
// Note - This computation of subjectPrincipal isn't necessarily sensical.
// It's just designed to preserve the old semantics during a mass-conversion
// patch.
nsCOMPtr<nsIPrincipal> subjectPrincipal =
aSubjectPrincipal.isSome() ? aSubjectPrincipal.value() : NodePrincipal();
BindingManager()->LoadBindingDocument(this, uri, subjectPrincipal);
}
NS_IMETHODIMP
nsDocument::GetBindingParent(nsIDOMNode* aNode, nsIDOMElement** aResult)
{
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
NS_ENSURE_ARG_POINTER(node);
Element* bindingParent = nsIDocument::GetBindingParent(*node);
nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(bindingParent);
retval.forget(aResult);
return NS_OK;
}
Element*
nsIDocument::GetBindingParent(nsINode& aNode)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(&aNode));
if (!content)
return nullptr;
nsIContent* bindingParent = content->GetBindingParent();
return bindingParent ? bindingParent->AsElement() : nullptr;
}
static Element*
GetElementByAttribute(nsIContent* aContent, nsIAtom* aAttrName,
const nsAString& aAttrValue, bool aUniversalMatch)
{
if (aUniversalMatch ? aContent->HasAttr(kNameSpaceID_None, aAttrName) :
aContent->AttrValueIs(kNameSpaceID_None, aAttrName,
aAttrValue, eCaseMatters)) {
return aContent->AsElement();
}
for (nsIContent* child = aContent->GetFirstChild();
child;
child = child->GetNextSibling()) {
Element* matchedElement =
GetElementByAttribute(child, aAttrName, aAttrValue, aUniversalMatch);
if (matchedElement)
return matchedElement;
}
return nullptr;
}
Element*
nsDocument::GetAnonymousElementByAttribute(nsIContent* aElement,
nsIAtom* aAttrName,
const nsAString& aAttrValue) const
{
nsINodeList* nodeList = BindingManager()->GetAnonymousNodesFor(aElement);
if (!nodeList)
return nullptr;
uint32_t length = 0;
nodeList->GetLength(&length);
bool universalMatch = aAttrValue.EqualsLiteral("*");
for (uint32_t i = 0; i < length; ++i) {
nsIContent* current = nodeList->Item(i);
Element* matchedElm =
GetElementByAttribute(current, aAttrName, aAttrValue, universalMatch);
if (matchedElm)
return matchedElm;
}
return nullptr;
}
NS_IMETHODIMP
nsDocument::GetAnonymousElementByAttribute(nsIDOMElement* aElement,
const nsAString& aAttrName,
const nsAString& aAttrValue,
nsIDOMElement** aResult)
{
nsCOMPtr<Element> element = do_QueryInterface(aElement);
NS_ENSURE_ARG_POINTER(element);
Element* anonEl =
nsIDocument::GetAnonymousElementByAttribute(*element, aAttrName,
aAttrValue);
nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(anonEl);
retval.forget(aResult);
return NS_OK;
}
Element*
nsIDocument::GetAnonymousElementByAttribute(Element& aElement,
const nsAString& aAttrName,
const nsAString& aAttrValue)
{
nsCOMPtr<nsIAtom> attribute = NS_Atomize(aAttrName);
return GetAnonymousElementByAttribute(&aElement, attribute, aAttrValue);
}
NS_IMETHODIMP
nsDocument::GetAnonymousNodes(nsIDOMElement* aElement,
nsIDOMNodeList** aResult)
{
*aResult = nullptr;
nsCOMPtr<nsIContent> content(do_QueryInterface(aElement));
return BindingManager()->GetAnonymousNodesFor(content, aResult);
}
nsINodeList*
nsIDocument::GetAnonymousNodes(Element& aElement)
{
return BindingManager()->GetAnonymousNodesFor(&aElement);
}
NS_IMETHODIMP
nsDocument::CreateRange(nsIDOMRange** aReturn)
{
ErrorResult rv;
*aReturn = nsIDocument::CreateRange(rv).take();
return rv.StealNSResult();
}
already_AddRefed<nsRange>
nsIDocument::CreateRange(ErrorResult& rv)
{
RefPtr<nsRange> range = new nsRange(this);
nsresult res = range->Set(this, 0, this, 0);
if (NS_FAILED(res)) {
rv.Throw(res);
return nullptr;
}
return range.forget();
}
NS_IMETHODIMP
nsDocument::CreateNodeIterator(nsIDOMNode *aRoot,
uint32_t aWhatToShow,
nsIDOMNodeFilter *aFilter,
uint8_t aOptionalArgc,
nsIDOMNodeIterator **_retval)
{
*_retval = nullptr;
if (!aOptionalArgc) {
aWhatToShow = nsIDOMNodeFilter::SHOW_ALL;
}
if (!aRoot) {
return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
}
nsCOMPtr<nsINode> root = do_QueryInterface(aRoot);
NS_ENSURE_TRUE(root, NS_ERROR_UNEXPECTED);
ErrorResult rv;
*_retval = nsIDocument::CreateNodeIterator(*root, aWhatToShow,
NodeFilterHolder(aFilter),
rv).take();
return rv.StealNSResult();
}
already_AddRefed<NodeIterator>
nsIDocument::CreateNodeIterator(nsINode& aRoot, uint32_t aWhatToShow,
NodeFilter* aFilter,
ErrorResult& rv) const
{
return CreateNodeIterator(aRoot, aWhatToShow, NodeFilterHolder(aFilter), rv);
}
already_AddRefed<NodeIterator>
nsIDocument::CreateNodeIterator(nsINode& aRoot, uint32_t aWhatToShow,
NodeFilterHolder aFilter,
ErrorResult& rv) const
{
nsINode* root = &aRoot;
RefPtr<NodeIterator> iterator = new NodeIterator(root, aWhatToShow,
Move(aFilter));
return iterator.forget();
}
NS_IMETHODIMP
nsDocument::CreateTreeWalker(nsIDOMNode *aRoot,
uint32_t aWhatToShow,
nsIDOMNodeFilter *aFilter,
uint8_t aOptionalArgc,
nsIDOMTreeWalker **_retval)
{
*_retval = nullptr;
if (!aOptionalArgc) {
aWhatToShow = nsIDOMNodeFilter::SHOW_ALL;
}
nsCOMPtr<nsINode> root = do_QueryInterface(aRoot);
NS_ENSURE_TRUE(root, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
ErrorResult rv;
*_retval = nsIDocument::CreateTreeWalker(*root, aWhatToShow,
NodeFilterHolder(aFilter),
rv).take();
return rv.StealNSResult();
}
already_AddRefed<TreeWalker>
nsIDocument::CreateTreeWalker(nsINode& aRoot, uint32_t aWhatToShow,
NodeFilter* aFilter,
ErrorResult& rv) const
{
return CreateTreeWalker(aRoot, aWhatToShow, NodeFilterHolder(aFilter), rv);
}
already_AddRefed<TreeWalker>
nsIDocument::CreateTreeWalker(nsINode& aRoot, uint32_t aWhatToShow,
NodeFilterHolder aFilter, ErrorResult& rv) const
{
nsINode* root = &aRoot;
RefPtr<TreeWalker> walker = new TreeWalker(root, aWhatToShow, Move(aFilter));
return walker.forget();
}
NS_IMETHODIMP
nsDocument::GetDefaultView(mozIDOMWindowProxy** aDefaultView)
{
*aDefaultView = nullptr;
nsCOMPtr<nsPIDOMWindowOuter> win = GetWindow();
win.forget(aDefaultView);
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetLocation(nsIDOMLocation **_retval)
{
*_retval = nsIDocument::GetLocation().take();
return NS_OK;
}
already_AddRefed<Location>
nsIDocument::GetLocation() const
{
nsCOMPtr<nsPIDOMWindowInner> w = do_QueryInterface(mScriptGlobalObject);
if (!w) {
return nullptr;
}
nsGlobalWindow* window = nsGlobalWindow::Cast(w);
ErrorResult dummy;
RefPtr<Location> loc = window->GetLocation(dummy);
dummy.SuppressException();
return loc.forget();
}
Element*
nsIDocument::GetHtmlElement() const
{
Element* rootElement = GetRootElement();
if (rootElement && rootElement->IsHTMLElement(nsGkAtoms::html))
return rootElement;
return nullptr;
}
Element*
nsIDocument::GetHtmlChildElement(nsIAtom* aTag)
{
Element* html = GetHtmlElement();
if (!html)
return nullptr;
// Look for the element with aTag inside html. This needs to run
// forwards to find the first such element.
for (nsIContent* child = html->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->IsHTMLElement(aTag))
return child->AsElement();
}
return nullptr;
}
Element*
nsDocument::GetTitleElement()
{
// mMayHaveTitleElement will have been set to true if any HTML or SVG
// <title> element has been bound to this document. So if it's false,
// we know there is nothing to do here. This avoids us having to search
// the whole DOM if someone calls document.title on a large document
// without a title.
if (!mMayHaveTitleElement)
return nullptr;
Element* root = GetRootElement();
if (root && root->IsSVGElement(nsGkAtoms::svg)) {
// In SVG, the document's title must be a child
for (nsIContent* child = root->GetFirstChild();
child; child = child->GetNextSibling()) {
if (child->IsSVGElement(nsGkAtoms::title)) {
return child->AsElement();
}
}
return nullptr;
}
// We check the HTML namespace even for non-HTML documents, except SVG. This
// matches the spec and the behavior of all tested browsers.
RefPtr<nsContentList> list =
NS_GetContentList(this, kNameSpaceID_XHTML, NS_LITERAL_STRING("title"));
nsIContent* first = list->Item(0, false);
return first ? first->AsElement() : nullptr;
}
NS_IMETHODIMP
nsDocument::GetTitle(nsAString& aTitle)
{
nsString title;
GetTitle(title);
aTitle = title;
return NS_OK;
}
void
nsDocument::GetTitle(nsString& aTitle)
{
aTitle.Truncate();
Element* rootElement = GetRootElement();
if (!rootElement) {
return;
}
nsAutoString tmp;
#ifdef MOZ_XUL
if (rootElement->IsXULElement()) {
rootElement->GetAttr(kNameSpaceID_None, nsGkAtoms::title, tmp);
} else
#endif
{
Element* title = GetTitleElement();
if (!title) {
return;
}
nsContentUtils::GetNodeTextContent(title, false, tmp);
}
tmp.CompressWhitespace();
aTitle = tmp;
}
NS_IMETHODIMP
nsDocument::SetTitle(const nsAString& aTitle)
{
Element* rootElement = GetRootElement();
if (!rootElement) {
return NS_OK;
}
#ifdef MOZ_XUL
if (rootElement->IsXULElement()) {
return rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::title,
aTitle, true);
}
#endif
// Batch updates so that mutation events don't change "the title
// element" under us
mozAutoDocUpdate updateBatch(this, UPDATE_CONTENT_MODEL, true);
nsCOMPtr<Element> title = GetTitleElement();
if (rootElement->IsSVGElement(nsGkAtoms::svg)) {
if (!title) {
RefPtr<mozilla::dom::NodeInfo> titleInfo =
mNodeInfoManager->GetNodeInfo(nsGkAtoms::title, nullptr,
kNameSpaceID_SVG,
nsIDOMNode::ELEMENT_NODE);
NS_NewSVGElement(getter_AddRefs(title), titleInfo.forget(),
NOT_FROM_PARSER);
if (!title) {
return NS_OK;
}
rootElement->InsertChildAt(title, 0, true);
}
} else if (rootElement->IsHTMLElement()) {
if (!title) {
Element* head = GetHeadElement();
if (!head) {
return NS_OK;
}
RefPtr<mozilla::dom::NodeInfo> titleInfo;
titleInfo = mNodeInfoManager->GetNodeInfo(nsGkAtoms::title, nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
title = NS_NewHTMLTitleElement(titleInfo.forget());
if (!title) {
return NS_OK;
}
head->AppendChildTo(title, true);
}
} else {
return NS_OK;
}
return nsContentUtils::SetNodeTextContent(title, aTitle, false);
}
void
nsDocument::SetTitle(const nsAString& aTitle, ErrorResult& rv)
{
rv = SetTitle(aTitle);
}
void
nsDocument::NotifyPossibleTitleChange(bool aBoundTitleElement)
{
NS_ASSERTION(!mInUnlinkOrDeletion || !aBoundTitleElement,
"Setting a title while unlinking or destroying the element?");
if (mInUnlinkOrDeletion) {
return;
}
if (aBoundTitleElement) {
mMayHaveTitleElement = true;
}
if (mPendingTitleChangeEvent.IsPending())
return;
RefPtr<nsRunnableMethod<nsDocument, void, false> > event =
NewNonOwningRunnableMethod(this,
&nsDocument::DoNotifyPossibleTitleChange);
nsresult rv = NS_DispatchToCurrentThread(event);
if (NS_SUCCEEDED(rv)) {
mPendingTitleChangeEvent = event;
}
}
void
nsDocument::DoNotifyPossibleTitleChange()
{
mPendingTitleChangeEvent.Forget();
mHaveFiredTitleChange = true;
nsAutoString title;
GetTitle(title);
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
nsCOMPtr<nsISupports> container =
shell->GetPresContext()->GetContainerWeak();
if (container) {
nsCOMPtr<nsIBaseWindow> docShellWin = do_QueryInterface(container);
if (docShellWin) {
docShellWin->SetTitle(title.get());
}
}
}
// Fire a DOM event for the title change.
nsContentUtils::DispatchChromeEvent(this, static_cast<nsIDocument*>(this),
NS_LITERAL_STRING("DOMTitleChanged"),
true, true);
}
already_AddRefed<BoxObject>
nsDocument::GetBoxObjectFor(Element* aElement, ErrorResult& aRv)
{
if (!aElement) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsIDocument* doc = aElement->OwnerDoc();
if (doc != this) {
aRv.Throw(NS_ERROR_DOM_WRONG_DOCUMENT_ERR);
return nullptr;
}
if (!mHasWarnedAboutBoxObjects && !aElement->IsXULElement()) {
mHasWarnedAboutBoxObjects = true;
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("BoxObjects"), this,
nsContentUtils::eDOM_PROPERTIES,
"UseOfGetBoxObjectForWarning");
}
if (!mBoxObjectTable) {
mBoxObjectTable = new nsInterfaceHashtable<nsPtrHashKey<nsIContent>, nsPIBoxObject>(6);
} else {
nsCOMPtr<nsPIBoxObject> boxObject = mBoxObjectTable->Get(aElement);
if (boxObject) {
return boxObject.forget().downcast<BoxObject>();
}
}
int32_t namespaceID;
nsCOMPtr<nsIAtom> tag = BindingManager()->ResolveTag(aElement, &namespaceID);
nsAutoCString contractID("@mozilla.org/layout/xul-boxobject");
if (namespaceID == kNameSpaceID_XUL) {
if (tag == nsGkAtoms::browser ||
tag == nsGkAtoms::editor ||
tag == nsGkAtoms::iframe)
contractID += "-container";
else if (tag == nsGkAtoms::menu)
contractID += "-menu";
else if (tag == nsGkAtoms::popup ||
tag == nsGkAtoms::menupopup ||
tag == nsGkAtoms::panel ||
tag == nsGkAtoms::tooltip)
contractID += "-popup";
else if (tag == nsGkAtoms::tree)
contractID += "-tree";
else if (tag == nsGkAtoms::listbox)
contractID += "-listbox";
else if (tag == nsGkAtoms::scrollbox)
contractID += "-scrollbox";
}
contractID += ";1";
nsCOMPtr<nsPIBoxObject> boxObject(do_CreateInstance(contractID.get()));
if (!boxObject) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
boxObject->Init(aElement);
if (mBoxObjectTable) {
mBoxObjectTable->Put(aElement, boxObject.get());
}
return boxObject.forget().downcast<BoxObject>();
}
void
nsDocument::ClearBoxObjectFor(nsIContent* aContent)
{
if (mBoxObjectTable) {
nsPIBoxObject *boxObject = mBoxObjectTable->GetWeak(aContent);
if (boxObject) {
boxObject->Clear();
mBoxObjectTable->Remove(aContent);
}
}
}
already_AddRefed<MediaQueryList>
nsIDocument::MatchMedia(const nsAString& aMediaQueryList)
{
RefPtr<MediaQueryList> result = new MediaQueryList(this, aMediaQueryList);
// Insert the new item at the end of the linked list.
PR_INSERT_BEFORE(result, &mDOMMediaQueryLists);
return result.forget();
}
void
nsDocument::FlushSkinBindings()
{
BindingManager()->FlushSkinBindings();
}
nsresult
nsDocument::InitializeFrameLoader(nsFrameLoader* aLoader)
{
mInitializableFrameLoaders.RemoveElement(aLoader);
// Don't even try to initialize.
if (mInDestructor) {
NS_WARNING("Trying to initialize a frame loader while"
"document is being deleted");
return NS_ERROR_FAILURE;
}
mInitializableFrameLoaders.AppendElement(aLoader);
if (!mFrameLoaderRunner) {
mFrameLoaderRunner =
NewRunnableMethod(this, &nsDocument::MaybeInitializeFinalizeFrameLoaders);
NS_ENSURE_TRUE(mFrameLoaderRunner, NS_ERROR_OUT_OF_MEMORY);
nsContentUtils::AddScriptRunner(mFrameLoaderRunner);
}
return NS_OK;
}
nsresult
nsDocument::FinalizeFrameLoader(nsFrameLoader* aLoader, nsIRunnable* aFinalizer)
{
mInitializableFrameLoaders.RemoveElement(aLoader);
if (mInDestructor) {
return NS_ERROR_FAILURE;
}
mFrameLoaderFinalizers.AppendElement(aFinalizer);
if (!mFrameLoaderRunner) {
mFrameLoaderRunner =
NewRunnableMethod(this, &nsDocument::MaybeInitializeFinalizeFrameLoaders);
NS_ENSURE_TRUE(mFrameLoaderRunner, NS_ERROR_OUT_OF_MEMORY);
nsContentUtils::AddScriptRunner(mFrameLoaderRunner);
}
return NS_OK;
}
void
nsDocument::MaybeInitializeFinalizeFrameLoaders()
{
if (mDelayFrameLoaderInitialization || mUpdateNestLevel != 0) {
// This method will be recalled when mUpdateNestLevel drops to 0,
// or when !mDelayFrameLoaderInitialization.
mFrameLoaderRunner = nullptr;
return;
}
// We're not in an update, but it is not safe to run scripts, so
// postpone frameloader initialization and finalization.
if (!nsContentUtils::IsSafeToRunScript()) {
if (!mInDestructor && !mFrameLoaderRunner &&
(mInitializableFrameLoaders.Length() ||
mFrameLoaderFinalizers.Length())) {
mFrameLoaderRunner =
NewRunnableMethod(this, &nsDocument::MaybeInitializeFinalizeFrameLoaders);
nsContentUtils::AddScriptRunner(mFrameLoaderRunner);
}
return;
}
mFrameLoaderRunner = nullptr;
// Don't use a temporary array for mInitializableFrameLoaders, because
// loading a frame may cause some other frameloader to be removed from the
// array. But be careful to keep the loader alive when starting the load!
while (mInitializableFrameLoaders.Length()) {
RefPtr<nsFrameLoader> loader = mInitializableFrameLoaders[0];
mInitializableFrameLoaders.RemoveElementAt(0);
NS_ASSERTION(loader, "null frameloader in the array?");
loader->ReallyStartLoading();
}
uint32_t length = mFrameLoaderFinalizers.Length();
if (length > 0) {
nsTArray<nsCOMPtr<nsIRunnable> > finalizers;
mFrameLoaderFinalizers.SwapElements(finalizers);
for (uint32_t i = 0; i < length; ++i) {
finalizers[i]->Run();
}
}
}
void
nsDocument::TryCancelFrameLoaderInitialization(nsIDocShell* aShell)
{
uint32_t length = mInitializableFrameLoaders.Length();
for (uint32_t i = 0; i < length; ++i) {
if (mInitializableFrameLoaders[i]->GetExistingDocShell() == aShell) {
mInitializableFrameLoaders.RemoveElementAt(i);
return;
}
}
}
nsIDocument*
nsDocument::RequestExternalResource(nsIURI* aURI,
nsINode* aRequestingNode,
ExternalResourceLoad** aPendingLoad)
{
NS_PRECONDITION(aURI, "Must have a URI");
NS_PRECONDITION(aRequestingNode, "Must have a node");
if (mDisplayDocument) {
return mDisplayDocument->RequestExternalResource(aURI,
aRequestingNode,
aPendingLoad);
}
return mExternalResourceMap.RequestResource(aURI, aRequestingNode,
this, aPendingLoad);
}
void
nsDocument::EnumerateExternalResources(nsSubDocEnumFunc aCallback, void* aData)
{
mExternalResourceMap.EnumerateResources(aCallback, aData);
}
nsSMILAnimationController*
nsDocument::GetAnimationController()
{
// We create the animation controller lazily because most documents won't want
// one and only SVG documents and the like will call this
if (mAnimationController)
return mAnimationController;
// Refuse to create an Animation Controller for data documents.
if (mLoadedAsData || mLoadedAsInteractiveData)
return nullptr;
mAnimationController = new nsSMILAnimationController(this);
// If there's a presContext then check the animation mode and pause if
// necessary.
nsIPresShell *shell = GetShell();
if (mAnimationController && shell) {
nsPresContext *context = shell->GetPresContext();
if (context &&
context->ImageAnimationMode() == imgIContainer::kDontAnimMode) {
mAnimationController->Pause(nsSMILTimeContainer::PAUSE_USERPREF);
}
}
// If we're hidden (or being hidden), notify the newly-created animation
// controller. (Skip this check for SVG-as-an-image documents, though,
// because they don't get OnPageShow / OnPageHide calls).
if (!mIsShowing && !mIsBeingUsedAsImage) {
mAnimationController->OnPageHide();
}
return mAnimationController;
}
PendingAnimationTracker*
nsDocument::GetOrCreatePendingAnimationTracker()
{
if (!mPendingAnimationTracker) {
mPendingAnimationTracker = new PendingAnimationTracker(this);
}
return mPendingAnimationTracker;
}
/**
* Retrieve the "direction" property of the document.
*
* @lina 01/09/2001
*/
NS_IMETHODIMP
nsDocument::GetDir(nsAString& aDirection)
{
nsIDocument::GetDir(aDirection);
return NS_OK;
}
void
nsIDocument::GetDir(nsAString& aDirection) const
{
aDirection.Truncate();
Element* rootElement = GetHtmlElement();
if (rootElement) {
static_cast<nsGenericHTMLElement*>(rootElement)->GetDir(aDirection);
}
}
/**
* Set the "direction" property of the document.
*
* @lina 01/09/2001
*/
NS_IMETHODIMP
nsDocument::SetDir(const nsAString& aDirection)
{
nsIDocument::SetDir(aDirection);
return NS_OK;
}
void
nsIDocument::SetDir(const nsAString& aDirection)
{
Element* rootElement = GetHtmlElement();
if (rootElement) {
rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::dir,
aDirection, true);
}
}
NS_IMETHODIMP
nsDocument::GetInputEncoding(nsAString& aInputEncoding)
{
nsIDocument::GetCharacterSet(aInputEncoding);
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetMozSyntheticDocument(bool *aSyntheticDocument)
{
*aSyntheticDocument = mIsSyntheticDocument;
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetDocumentURI(nsAString& aDocumentURI)
{
nsString temp;
nsresult rv = nsIDocument::GetDocumentURI(temp);
aDocumentURI = temp;
return rv;
}
nsresult
nsIDocument::GetDocumentURI(nsString& aDocumentURI) const
{
if (mDocumentURI) {
nsAutoCString uri;
nsresult rv = mDocumentURI->GetSpec(uri);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(uri, aDocumentURI);
} else {
aDocumentURI.Truncate();
}
return NS_OK;
}
// Alias of above
NS_IMETHODIMP
nsDocument::GetURL(nsAString& aURL)
{
return GetDocumentURI(aURL);
}
nsresult
nsIDocument::GetURL(nsString& aURL) const
{
return GetDocumentURI(aURL);
}
void
nsIDocument::GetDocumentURIFromJS(nsString& aDocumentURI, ErrorResult& aRv) const
{
if (!mChromeXHRDocURI || !nsContentUtils::IsCallerChrome()) {
aRv = GetDocumentURI(aDocumentURI);
return;
}
nsAutoCString uri;
nsresult res = mChromeXHRDocURI->GetSpec(uri);
if (NS_FAILED(res)) {
aRv.Throw(res);
return;
}
CopyUTF8toUTF16(uri, aDocumentURI);
}
nsIURI*
nsIDocument::GetDocumentURIObject() const
{
if (!mChromeXHRDocURI) {
return GetDocumentURI();
}
return mChromeXHRDocURI;
}
// Returns "BackCompat" if we are in quirks mode, "CSS1Compat" if we are
// in almost standards or full standards mode. See bug 105640. This was
// implemented to match MSIE's compatMode property.
NS_IMETHODIMP
nsDocument::GetCompatMode(nsAString& aCompatMode)
{
nsString temp;
nsIDocument::GetCompatMode(temp);
aCompatMode = temp;
return NS_OK;
}
void
nsIDocument::GetCompatMode(nsString& aCompatMode) const
{
NS_ASSERTION(mCompatMode == eCompatibility_NavQuirks ||
mCompatMode == eCompatibility_AlmostStandards ||
mCompatMode == eCompatibility_FullStandards,
"mCompatMode is neither quirks nor strict for this document");
if (mCompatMode == eCompatibility_NavQuirks) {
aCompatMode.AssignLiteral("BackCompat");
} else {
aCompatMode.AssignLiteral("CSS1Compat");
}
}
void
nsDOMAttributeMap::BlastSubtreeToPieces(nsINode *aNode)
{
if (aNode->IsElement()) {
Element *element = aNode->AsElement();
const nsDOMAttributeMap *map = element->GetAttributeMap();
if (map) {
// This non-standard style of iteration is presumably used because some
// of the code in the loop body can trigger element removal, which
// invalidates the iterator.
while (true) {
auto iter = map->mAttributeCache.ConstIter();
if (iter.Done()) {
break;
}
nsCOMPtr<nsIAttribute> attr = iter.UserData();
NS_ASSERTION(attr.get(),
"non-nsIAttribute somehow made it into the hashmap?!");
BlastSubtreeToPieces(attr);
DebugOnly<nsresult> rv =
element->UnsetAttr(attr->NodeInfo()->NamespaceID(),
attr->NodeInfo()->NameAtom(),
false);
// XXX Should we abort here?
NS_ASSERTION(NS_SUCCEEDED(rv), "Uh-oh, UnsetAttr shouldn't fail!");
}
}
}
uint32_t count = aNode->GetChildCount();
for (uint32_t i = 0; i < count; ++i) {
BlastSubtreeToPieces(aNode->GetFirstChild());
aNode->RemoveChildAt(0, false);
}
}
NS_IMETHODIMP
nsDocument::AdoptNode(nsIDOMNode *aAdoptedNode, nsIDOMNode **aResult)
{
*aResult = nullptr;
nsCOMPtr<nsINode> adoptedNode = do_QueryInterface(aAdoptedNode);
NS_ENSURE_TRUE(adoptedNode, NS_ERROR_UNEXPECTED);
ErrorResult rv;
nsINode* result = nsIDocument::AdoptNode(*adoptedNode, rv);
if (rv.Failed()) {
return rv.StealNSResult();
}
NS_ADDREF(*aResult = result->AsDOMNode());
return NS_OK;
}
nsINode*
nsIDocument::AdoptNode(nsINode& aAdoptedNode, ErrorResult& rv)
{
nsINode* adoptedNode = &aAdoptedNode;
// Scope firing mutation events so that we don't carry any state that
// might be stale
{
nsINode* parent = adoptedNode->GetParentNode();
if (parent) {
nsContentUtils::MaybeFireNodeRemoved(adoptedNode, parent,
adoptedNode->OwnerDoc());
}
}
nsAutoScriptBlocker scriptBlocker;
switch (adoptedNode->NodeType()) {
case nsIDOMNode::ATTRIBUTE_NODE:
{
// Remove from ownerElement.
RefPtr<Attr> adoptedAttr = static_cast<Attr*>(adoptedNode);
nsCOMPtr<Element> ownerElement = adoptedAttr->GetOwnerElement(rv);
if (rv.Failed()) {
return nullptr;
}
if (ownerElement) {
RefPtr<Attr> newAttr =
ownerElement->RemoveAttributeNode(*adoptedAttr, rv);
if (rv.Failed()) {
return nullptr;
}
newAttr.swap(adoptedAttr);
}
break;
}
case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
{
if (ShadowRoot::FromNode(adoptedNode)) {
rv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
return nullptr;
}
MOZ_FALLTHROUGH;
}
case nsIDOMNode::ELEMENT_NODE:
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
case nsIDOMNode::TEXT_NODE:
case nsIDOMNode::CDATA_SECTION_NODE:
case nsIDOMNode::COMMENT_NODE:
case nsIDOMNode::DOCUMENT_TYPE_NODE:
{
// Don't allow adopting a node's anonymous subtree out from under it.
if (adoptedNode->AsContent()->IsRootOfAnonymousSubtree()) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
// We don't want to adopt an element into its own contentDocument or into
// a descendant contentDocument, so we check if the frameElement of this
// document or any of its parents is the adopted node or one of its
// descendants.
nsIDocument *doc = this;
do {
if (nsPIDOMWindowOuter *win = doc->GetWindow()) {
nsCOMPtr<nsINode> node = win->GetFrameElementInternal();
if (node &&
nsContentUtils::ContentIsDescendantOf(node, adoptedNode)) {
rv.Throw(NS_ERROR_DOM_HIERARCHY_REQUEST_ERR);
return nullptr;
}
}
} while ((doc = doc->GetParentDocument()));
// Remove from parent.
nsCOMPtr<nsINode> parent = adoptedNode->GetParentNode();
if (parent) {
int32_t idx = parent->IndexOf(adoptedNode);
MOZ_ASSERT(idx >= 0);
parent->RemoveChildAt(idx, true);
} else {
MOZ_ASSERT(!adoptedNode->IsInUncomposedDoc());
// If we're adopting a node that's not in a document, it might still
// have a binding applied. Remove the binding from the element now
// that it's getting adopted into a new document.
// TODO Fully tear down the binding.
adoptedNode->AsContent()->SetXBLBinding(nullptr);
}
break;
}
case nsIDOMNode::DOCUMENT_NODE:
{
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
default:
{
NS_WARNING("Don't know how to adopt this nodetype for adoptNode.");
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
}
nsCOMPtr<nsIDocument> oldDocument = adoptedNode->OwnerDoc();
bool sameDocument = oldDocument == this;
AutoJSContext cx;
JS::Rooted<JSObject*> newScope(cx, nullptr);
if (!sameDocument) {
newScope = GetWrapper();
if (!newScope && GetScopeObject() && GetScopeObject()->GetGlobalJSObject()) {
// Make sure cx is in a semi-sane compartment before we call WrapNative.
// It's kind of irrelevant, given that we're passing aAllowWrapping =
// false, and documents should always insist on being wrapped in an
// canonical scope. But we try to pass something sane anyway.
JSAutoCompartment ac(cx, GetScopeObject()->GetGlobalJSObject());
JS::Rooted<JS::Value> v(cx);
rv = nsContentUtils::WrapNative(cx, this, this, &v,
/* aAllowWrapping = */ false);
if (rv.Failed())
return nullptr;
newScope = &v.toObject();
}
}
nsCOMArray<nsINode> nodesWithProperties;
rv = nsNodeUtils::Adopt(adoptedNode, sameDocument ? nullptr : mNodeInfoManager,
newScope, nodesWithProperties);
if (rv.Failed()) {
// Disconnect all nodes from their parents, since some have the old document
// as their ownerDocument and some have this as their ownerDocument.
nsDOMAttributeMap::BlastSubtreeToPieces(adoptedNode);
if (!sameDocument && oldDocument) {
uint32_t count = nodesWithProperties.Count();
for (uint32_t j = 0; j < oldDocument->GetPropertyTableCount(); ++j) {
for (uint32_t i = 0; i < count; ++i) {
// Remove all properties.
oldDocument->PropertyTable(j)->
DeleteAllPropertiesFor(nodesWithProperties[i]);
}
}
}
return nullptr;
}
uint32_t count = nodesWithProperties.Count();
if (!sameDocument && oldDocument) {
for (uint32_t j = 0; j < oldDocument->GetPropertyTableCount(); ++j) {
nsPropertyTable *oldTable = oldDocument->PropertyTable(j);
nsPropertyTable *newTable = PropertyTable(j);
for (uint32_t i = 0; i < count; ++i) {
rv = oldTable->TransferOrDeleteAllPropertiesFor(nodesWithProperties[i],
newTable);
}
}
if (rv.Failed()) {
// Disconnect all nodes from their parents.
nsDOMAttributeMap::BlastSubtreeToPieces(adoptedNode);
return nullptr;
}
}
NS_ASSERTION(adoptedNode->OwnerDoc() == this,
"Should still be in the document we just got adopted into");
return adoptedNode;
}
nsViewportInfo
nsDocument::GetViewportInfo(const ScreenIntSize& aDisplaySize)
{
// Compute the CSS-to-LayoutDevice pixel scale as the product of the
// widget scale and the full zoom.
nsPresContext* context = mPresShell->GetPresContext();
// When querying the full zoom, get it from the device context rather than
// directly from the pres context, because the device context's value can
// include an adjustment necessay to keep the number of app units per device
// pixel an integer, and we want the adjusted value.
float fullZoom = context ? context->DeviceContext()->GetFullZoom() : 1.0;
fullZoom = (fullZoom == 0.0) ? 1.0 : fullZoom;
CSSToLayoutDeviceScale layoutDeviceScale = context ? context->CSSToDevPixelScale() : CSSToLayoutDeviceScale(1);
CSSToScreenScale defaultScale = layoutDeviceScale
* LayoutDeviceToScreenScale(1.0);
// Special behaviour for desktop mode, provided we are not on an about: page
nsPIDOMWindowOuter* win = GetWindow();
if (win && win->IsDesktopModeViewport() && !IsAboutPage())
{
CSSCoord viewportWidth = gfxPrefs::DesktopViewportWidth() / fullZoom;
CSSToScreenScale scaleToFit(aDisplaySize.width / viewportWidth);
float aspectRatio = (float)aDisplaySize.height / aDisplaySize.width;
CSSSize viewportSize(viewportWidth, viewportWidth * aspectRatio);
ScreenIntSize fakeDesktopSize = RoundedToInt(viewportSize * scaleToFit);
return nsViewportInfo(fakeDesktopSize,
scaleToFit,
/*allowZoom*/ true);
}
if (!gfxPrefs::MetaViewportEnabled()) {
return nsViewportInfo(aDisplaySize,
defaultScale,
/*allowZoom*/ false);
}
// In cases where the width of the CSS viewport is less than or equal to the width
// of the display (i.e. width <= device-width) then we disable double-tap-to-zoom
// behaviour. See bug 941995 for details.
switch (mViewportType) {
case DisplayWidthHeight:
return nsViewportInfo(aDisplaySize,
defaultScale,
/*allowZoom*/ true);
case Unknown:
{
nsAutoString viewport;
GetHeaderData(nsGkAtoms::viewport, viewport);
if (viewport.IsEmpty()) {
// If the docType specifies that we are on a site optimized for mobile,
// then we want to return specially crafted defaults for the viewport info.
nsCOMPtr<nsIDOMDocumentType> docType;
nsresult rv = GetDoctype(getter_AddRefs(docType));
if (NS_SUCCEEDED(rv) && docType) {
nsAutoString docId;
rv = docType->GetPublicId(docId);
if (NS_SUCCEEDED(rv)) {
if ((docId.Find("WAP") != -1) ||
(docId.Find("Mobile") != -1) ||
(docId.Find("WML") != -1))
{
// We're making an assumption that the docType can't change here
mViewportType = DisplayWidthHeight;
return nsViewportInfo(aDisplaySize,
defaultScale,
/*allowZoom*/true);
}
}
}
nsAutoString handheldFriendly;
GetHeaderData(nsGkAtoms::handheldFriendly, handheldFriendly);
if (handheldFriendly.EqualsLiteral("true")) {
mViewportType = DisplayWidthHeight;
return nsViewportInfo(aDisplaySize,
defaultScale,
/*allowZoom*/true);
}
}
nsAutoString minScaleStr;
GetHeaderData(nsGkAtoms::viewport_minimum_scale, minScaleStr);
nsresult errorCode;
mScaleMinFloat = LayoutDeviceToScreenScale(minScaleStr.ToFloat(&errorCode));
if (NS_FAILED(errorCode)) {
mScaleMinFloat = kViewportMinScale;
}
mScaleMinFloat = mozilla::clamped(
mScaleMinFloat, kViewportMinScale, kViewportMaxScale);
nsAutoString maxScaleStr;
GetHeaderData(nsGkAtoms::viewport_maximum_scale, maxScaleStr);
// We define a special error code variable for the scale and max scale,
// because they are used later (see the width calculations).
nsresult scaleMaxErrorCode;
mScaleMaxFloat = LayoutDeviceToScreenScale(maxScaleStr.ToFloat(&scaleMaxErrorCode));
if (NS_FAILED(scaleMaxErrorCode)) {
mScaleMaxFloat = kViewportMaxScale;
}
mScaleMaxFloat = mozilla::clamped(
mScaleMaxFloat, kViewportMinScale, kViewportMaxScale);
nsAutoString scaleStr;
GetHeaderData(nsGkAtoms::viewport_initial_scale, scaleStr);
nsresult scaleErrorCode;
mScaleFloat = LayoutDeviceToScreenScale(scaleStr.ToFloat(&scaleErrorCode));
nsAutoString widthStr, heightStr;
GetHeaderData(nsGkAtoms::viewport_height, heightStr);
GetHeaderData(nsGkAtoms::viewport_width, widthStr);
mAutoSize = false;
if (widthStr.EqualsLiteral("device-width")) {
mAutoSize = true;
}
if (widthStr.IsEmpty() &&
(heightStr.EqualsLiteral("device-height") ||
(mScaleFloat.scale == 1.0)))
{
mAutoSize = true;
}
nsresult widthErrorCode, heightErrorCode;
mViewportSize.width = widthStr.ToInteger(&widthErrorCode);
mViewportSize.height = heightStr.ToInteger(&heightErrorCode);
// If width or height has not been set to a valid number by this point,
// fall back to a default value.
mValidWidth = (!widthStr.IsEmpty() && NS_SUCCEEDED(widthErrorCode) && mViewportSize.width > 0);
mValidHeight = (!heightStr.IsEmpty() && NS_SUCCEEDED(heightErrorCode) && mViewportSize.height > 0);
mAllowZoom = true;
nsAutoString userScalable;
GetHeaderData(nsGkAtoms::viewport_user_scalable, userScalable);
if ((userScalable.EqualsLiteral("0")) ||
(userScalable.EqualsLiteral("no")) ||
(userScalable.EqualsLiteral("false"))) {
mAllowZoom = false;
}
mScaleStrEmpty = scaleStr.IsEmpty();
mWidthStrEmpty = widthStr.IsEmpty();
mValidScaleFloat = !scaleStr.IsEmpty() && NS_SUCCEEDED(scaleErrorCode);
mValidMaxScale = !maxScaleStr.IsEmpty() && NS_SUCCEEDED(scaleMaxErrorCode);
mViewportType = Specified;
MOZ_FALLTHROUGH;
}
case Specified:
default:
LayoutDeviceToScreenScale effectiveMinScale = mScaleMinFloat;
LayoutDeviceToScreenScale effectiveMaxScale = mScaleMaxFloat;
bool effectiveValidMaxScale = mValidMaxScale;
bool effectiveAllowZoom = mAllowZoom;
if (gfxPrefs::ForceUserScalable()) {
// If the pref to force user-scalable is enabled, we ignore the values
// from the meta-viewport tag for these properties and just assume they
// allow the page to be scalable. Note in particular that this code is
// in the "Specified" branch of the enclosing switch statement, so that
// calls to GetViewportInfo always use the latest value of the
// ForceUserScalable pref. Other codepaths that return nsViewportInfo
// instances are all consistent with ForceUserScalable() already.
effectiveMinScale = kViewportMinScale;
effectiveMaxScale = kViewportMaxScale;
effectiveValidMaxScale = true;
effectiveAllowZoom = true;
}
CSSSize size = mViewportSize;
if (!mValidWidth) {
if (mValidHeight && !aDisplaySize.IsEmpty()) {
size.width = size.height * aDisplaySize.width / aDisplaySize.height;
} else {
// Stretch CSS pixel size of viewport to keep device pixel size
// unchanged after full zoom applied.
// See bug 974242.
size.width = gfxPrefs::DesktopViewportWidth() / fullZoom;
}
}
if (!mValidHeight) {
if (!aDisplaySize.IsEmpty()) {
size.height = size.width * aDisplaySize.height / aDisplaySize.width;
} else {
size.height = size.width;
}
}
CSSToScreenScale scaleFloat = mScaleFloat * layoutDeviceScale;
CSSToScreenScale scaleMinFloat = effectiveMinScale * layoutDeviceScale;
CSSToScreenScale scaleMaxFloat = effectiveMaxScale * layoutDeviceScale;
if (mAutoSize) {
// aDisplaySize is in screen pixels; convert them to CSS pixels for the viewport size.
CSSToScreenScale defaultPixelScale = layoutDeviceScale * LayoutDeviceToScreenScale(1.0f);
size = ScreenSize(aDisplaySize) / defaultPixelScale;
}
size.width = clamped(size.width, float(kViewportMinSize.width), float(kViewportMaxSize.width));
// Also recalculate the default zoom, if it wasn't specified in the metadata,
// and the width is specified.
if (mScaleStrEmpty && !mWidthStrEmpty) {
CSSToScreenScale defaultScale(float(aDisplaySize.width) / size.width);
scaleFloat = (scaleFloat > defaultScale) ? scaleFloat : defaultScale;
}
size.height = clamped(size.height, float(kViewportMinSize.height), float(kViewportMaxSize.height));
// We need to perform a conversion, but only if the initial or maximum
// scale were set explicitly by the user.
if (mValidScaleFloat && scaleFloat >= scaleMinFloat && scaleFloat <= scaleMaxFloat) {
CSSSize displaySize = ScreenSize(aDisplaySize) / scaleFloat;
size.width = std::max(size.width, displaySize.width);
size.height = std::max(size.height, displaySize.height);
} else if (effectiveValidMaxScale) {
CSSSize displaySize = ScreenSize(aDisplaySize) / scaleMaxFloat;
size.width = std::max(size.width, displaySize.width);
size.height = std::max(size.height, displaySize.height);
}
return nsViewportInfo(scaleFloat, scaleMinFloat, scaleMaxFloat, size,
mAutoSize, effectiveAllowZoom);
}
}
EventListenerManager*
nsDocument::GetOrCreateListenerManager()
{
if (!mListenerManager) {
mListenerManager =
new EventListenerManager(static_cast<EventTarget*>(this));
SetFlags(NODE_HAS_LISTENERMANAGER);
}
return mListenerManager;
}
EventListenerManager*
nsDocument::GetExistingListenerManager() const
{
return mListenerManager;
}
nsresult
nsDocument::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
aVisitor.mCanHandle = true;
// FIXME! This is a hack to make middle mouse paste working also in Editor.
// Bug 329119
aVisitor.mForceContentDispatch = true;
// Load events must not propagate to |window| object, see bug 335251.
if (aVisitor.mEvent->mMessage != eLoad) {
nsGlobalWindow* window = nsGlobalWindow::Cast(GetWindow());
aVisitor.mParentTarget =
window ? window->GetTargetForEventTargetChain() : nullptr;
}
return NS_OK;
}
NS_IMETHODIMP
nsDocument::CreateEvent(const nsAString& aEventType, nsIDOMEvent** aReturn)
{
NS_ENSURE_ARG_POINTER(aReturn);
ErrorResult rv;
*aReturn = nsIDocument::CreateEvent(aEventType, rv).take();
return rv.StealNSResult();
}
already_AddRefed<Event>
nsIDocument::CreateEvent(const nsAString& aEventType, ErrorResult& rv) const
{
nsIPresShell *shell = GetShell();
nsPresContext *presContext = nullptr;
if (shell) {
// Retrieve the context
presContext = shell->GetPresContext();
}
// Create event even without presContext.
RefPtr<Event> ev =
EventDispatcher::CreateEvent(const_cast<nsIDocument*>(this), presContext,
nullptr, aEventType);
if (!ev) {
rv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
WidgetEvent* e = ev->WidgetEventPtr();
e->mFlags.mBubbles = false;
e->mFlags.mCancelable = false;
return ev.forget();
}
void
nsDocument::FlushPendingNotifications(mozFlushType aType)
{
nsDocumentOnStack dos(this);
// We need to flush the sink for non-HTML documents (because the XML
// parser still does insertion with deferred notifications). We
// also need to flush the sink if this is a layout-related flush, to
// make sure that layout is started as needed. But we can skip that
// part if we have no presshell or if it's already done an initial
// reflow.
if ((!IsHTMLDocument() ||
(aType > Flush_ContentAndNotify && mPresShell &&
!mPresShell->DidInitialize())) &&
(mParser || mWeakSink)) {
nsCOMPtr<nsIContentSink> sink;
if (mParser) {
sink = mParser->GetContentSink();
} else {
sink = do_QueryReferent(mWeakSink);
if (!sink) {
mWeakSink = nullptr;
}
}
// Determine if it is safe to flush the sink notifications
// by determining if it safe to flush all the presshells.
if (sink && (aType == Flush_Content || IsSafeToFlush())) {
sink->FlushPendingNotifications(aType);
}
}
// Should we be flushing pending binding constructors in here?
if (aType <= Flush_ContentAndNotify) {
// Nothing to do here
return;
}
// If we have a parent we must flush the parent too to ensure that our
// container is reflowed if its size was changed. But if it's not safe to
// flush ourselves, then don't flush the parent, since that can cause things
// like resizes of our frame's widget, which we can't handle while flushing
// is unsafe.
// Since media queries mean that a size change of our container can
// affect style, we need to promote a style flush on ourself to a
// layout flush on our parent, since we need our container to be the
// correct size to determine the correct style.
if (mParentDocument && IsSafeToFlush()) {
mozFlushType parentType = aType;
if (aType >= Flush_Style)
parentType = std::max(Flush_Layout, aType);
mParentDocument->FlushPendingNotifications(parentType);
}
// We can optimize away getting our presshell and calling
// FlushPendingNotifications on it if we don't need a flush of the sort we're
// looking at. The one exception is if mInFlush is true, because in that
// case we might have set mNeedStyleFlush and mNeedLayoutFlush to false
// already but the presshell hasn't actually done the corresponding work yet.
// So if mInFlush and reentering this code, we need to flush the presshell.
if (mNeedStyleFlush ||
(mNeedLayoutFlush && aType >= Flush_InterruptibleLayout) ||
aType >= Flush_Display ||
mInFlush) {
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
mNeedStyleFlush = false;
mNeedLayoutFlush = mNeedLayoutFlush && (aType < Flush_InterruptibleLayout);
// mInFlush is a bitfield, so can't us AutoRestore here. But we
// need to keep track of multi-level reentry correctly, so need
// to restore the old mInFlush value.
bool oldInFlush = mInFlush;
mInFlush = true;
shell->FlushPendingNotifications(aType);
mInFlush = oldInFlush;
}
}
}
static bool
Copy(nsIDocument* aDocument, void* aData)
{
nsTArray<nsCOMPtr<nsIDocument> >* resources =
static_cast<nsTArray<nsCOMPtr<nsIDocument> >* >(aData);
resources->AppendElement(aDocument);
return true;
}
void
nsDocument::FlushExternalResources(mozFlushType aType)
{
NS_ASSERTION(aType >= Flush_Style,
"should only need to flush for style or higher in external resources");
if (GetDisplayDocument()) {
return;
}
nsTArray<nsCOMPtr<nsIDocument> > resources;
EnumerateExternalResources(Copy, &resources);
for (uint32_t i = 0; i < resources.Length(); i++) {
resources[i]->FlushPendingNotifications(aType);
}
}
void
nsDocument::SetXMLDeclaration(const char16_t *aVersion,
const char16_t *aEncoding,
const int32_t aStandalone)
{
if (!aVersion || *aVersion == '\0') {
mXMLDeclarationBits = 0;
return;
}
mXMLDeclarationBits = XML_DECLARATION_BITS_DECLARATION_EXISTS;
if (aEncoding && *aEncoding != '\0') {
mXMLDeclarationBits |= XML_DECLARATION_BITS_ENCODING_EXISTS;
}
if (aStandalone == 1) {
mXMLDeclarationBits |= XML_DECLARATION_BITS_STANDALONE_EXISTS |
XML_DECLARATION_BITS_STANDALONE_YES;
}
else if (aStandalone == 0) {
mXMLDeclarationBits |= XML_DECLARATION_BITS_STANDALONE_EXISTS;
}
}
void
nsDocument::GetXMLDeclaration(nsAString& aVersion, nsAString& aEncoding,
nsAString& aStandalone)
{
aVersion.Truncate();
aEncoding.Truncate();
aStandalone.Truncate();
if (!(mXMLDeclarationBits & XML_DECLARATION_BITS_DECLARATION_EXISTS)) {
return;
}
// always until we start supporting 1.1 etc.
aVersion.AssignLiteral("1.0");
if (mXMLDeclarationBits & XML_DECLARATION_BITS_ENCODING_EXISTS) {
// This is what we have stored, not necessarily what was written
// in the original
GetCharacterSet(aEncoding);
}
if (mXMLDeclarationBits & XML_DECLARATION_BITS_STANDALONE_EXISTS) {
if (mXMLDeclarationBits & XML_DECLARATION_BITS_STANDALONE_YES) {
aStandalone.AssignLiteral("yes");
} else {
aStandalone.AssignLiteral("no");
}
}
}
bool
nsDocument::IsScriptEnabled()
{
// If this document is sandboxed without 'allow-scripts'
// script is not enabled
if (HasScriptsBlockedBySandbox()) {
return false;
}
nsCOMPtr<nsIScriptGlobalObject> globalObject = do_QueryInterface(GetInnerWindow());
if (!globalObject && mMasterDocument) {
globalObject = do_QueryInterface(mMasterDocument->GetInnerWindow());
}
if (!globalObject || !globalObject->GetGlobalJSObject()) {
return false;
}
return xpc::Scriptability::Get(globalObject->GetGlobalJSObject()).Allowed();
}
nsRadioGroupStruct*
nsDocument::GetRadioGroupInternal(const nsAString& aName) const
{
#ifdef DEBUG
if (IsHTMLDocument()) {
nsAutoString lcName;
ToLowerCase(aName, lcName);
MOZ_ASSERT(aName == lcName);
}
#endif
nsRadioGroupStruct* radioGroup;
if (!mRadioGroups.Get(aName, &radioGroup)) {
return nullptr;
}
return radioGroup;
}
nsRadioGroupStruct*
nsDocument::GetRadioGroup(const nsAString& aName) const
{
nsAutoString tmKey(aName);
if (IsHTMLDocument()) {
ToLowerCase(tmKey); //should case-insensitive.
}
return GetRadioGroupInternal(tmKey);
}
nsRadioGroupStruct*
nsDocument::GetOrCreateRadioGroup(const nsAString& aName)
{
nsAutoString tmKey(aName);
if (IsHTMLDocument()) {
ToLowerCase(tmKey); //should case-insensitive.
}
if (nsRadioGroupStruct* radioGroup = GetRadioGroupInternal(tmKey)) {
return radioGroup;
}
nsAutoPtr<nsRadioGroupStruct> newRadioGroup(new nsRadioGroupStruct());
mRadioGroups.Put(tmKey, newRadioGroup);
return newRadioGroup.forget();
}
void
nsDocument::SetCurrentRadioButton(const nsAString& aName,
HTMLInputElement* aRadio)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
radioGroup->mSelectedRadioButton = aRadio;
}
HTMLInputElement*
nsDocument::GetCurrentRadioButton(const nsAString& aName)
{
return GetOrCreateRadioGroup(aName)->mSelectedRadioButton;
}
NS_IMETHODIMP
nsDocument::GetNextRadioButton(const nsAString& aName,
const bool aPrevious,
HTMLInputElement* aFocusedRadio,
HTMLInputElement** aRadioOut)
{
// XXX Can we combine the HTML radio button method impls of
// nsDocument and nsHTMLFormControl?
// XXX Why is HTML radio button stuff in nsDocument, as
// opposed to nsHTMLDocument?
*aRadioOut = nullptr;
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
// Return the radio button relative to the focused radio button.
// If no radio is focused, get the radio relative to the selected one.
RefPtr<HTMLInputElement> currentRadio;
if (aFocusedRadio) {
currentRadio = aFocusedRadio;
}
else {
currentRadio = radioGroup->mSelectedRadioButton;
if (!currentRadio) {
return NS_ERROR_FAILURE;
}
}
int32_t index = radioGroup->mRadioButtons.IndexOf(currentRadio);
if (index < 0) {
return NS_ERROR_FAILURE;
}
int32_t numRadios = radioGroup->mRadioButtons.Count();
RefPtr<HTMLInputElement> radio;
do {
if (aPrevious) {
if (--index < 0) {
index = numRadios -1;
}
}
else if (++index >= numRadios) {
index = 0;
}
NS_ASSERTION(static_cast<nsGenericHTMLFormElement*>(radioGroup->mRadioButtons[index])->IsHTMLElement(nsGkAtoms::input),
"mRadioButtons holding a non-radio button");
radio = static_cast<HTMLInputElement*>(radioGroup->mRadioButtons[index]);
} while (radio->Disabled() && radio != currentRadio);
radio.forget(aRadioOut);
return NS_OK;
}
void
nsDocument::AddToRadioGroup(const nsAString& aName,
nsIFormControl* aRadio)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
radioGroup->mRadioButtons.AppendObject(aRadio);
nsCOMPtr<nsIContent> element = do_QueryInterface(aRadio);
NS_ASSERTION(element, "radio controls have to be content elements");
if (element->HasAttr(kNameSpaceID_None, nsGkAtoms::required)) {
radioGroup->mRequiredRadioCount++;
}
}
void
nsDocument::RemoveFromRadioGroup(const nsAString& aName,
nsIFormControl* aRadio)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
radioGroup->mRadioButtons.RemoveObject(aRadio);
nsCOMPtr<nsIContent> element = do_QueryInterface(aRadio);
NS_ASSERTION(element, "radio controls have to be content elements");
if (element->HasAttr(kNameSpaceID_None, nsGkAtoms::required)) {
NS_ASSERTION(radioGroup->mRequiredRadioCount != 0,
"mRequiredRadioCount about to wrap below 0!");
radioGroup->mRequiredRadioCount--;
}
}
NS_IMETHODIMP
nsDocument::WalkRadioGroup(const nsAString& aName,
nsIRadioVisitor* aVisitor,
bool aFlushContent)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
for (int i = 0; i < radioGroup->mRadioButtons.Count(); i++) {
if (!aVisitor->Visit(radioGroup->mRadioButtons[i])) {
return NS_OK;
}
}
return NS_OK;
}
uint32_t
nsDocument::GetRequiredRadioCount(const nsAString& aName) const
{
nsRadioGroupStruct* radioGroup = GetRadioGroup(aName);
return radioGroup ? radioGroup->mRequiredRadioCount : 0;
}
void
nsDocument::RadioRequiredWillChange(const nsAString& aName, bool aRequiredAdded)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
if (aRequiredAdded) {
radioGroup->mRequiredRadioCount++;
} else {
NS_ASSERTION(radioGroup->mRequiredRadioCount != 0,
"mRequiredRadioCount about to wrap below 0!");
radioGroup->mRequiredRadioCount--;
}
}
bool
nsDocument::GetValueMissingState(const nsAString& aName) const
{
nsRadioGroupStruct* radioGroup = GetRadioGroup(aName);
return radioGroup && radioGroup->mGroupSuffersFromValueMissing;
}
void
nsDocument::SetValueMissingState(const nsAString& aName, bool aValue)
{
nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName);
radioGroup->mGroupSuffersFromValueMissing = aValue;
}
void
nsDocument::RetrieveRelevantHeaders(nsIChannel *aChannel)
{
PRTime modDate = 0;
nsresult rv;
nsCOMPtr<nsIHttpChannel> httpChannel;
rv = GetHttpChannelHelper(aChannel, getter_AddRefs(httpChannel));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
if (httpChannel) {
nsAutoCString tmp;
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("last-modified"),
tmp);
if (NS_SUCCEEDED(rv)) {
PRTime time;
PRStatus st = PR_ParseTimeString(tmp.get(), true, &time);
if (st == PR_SUCCESS) {
modDate = time;
}
}
// The misspelled key 'referer' is as per the HTTP spec
rv = httpChannel->GetRequestHeader(NS_LITERAL_CSTRING("referer"),
mReferrer);
static const char *const headers[] = {
"default-style",
"content-style-type",
"content-language",
"content-disposition",
"refresh",
"x-dns-prefetch-control",
"x-frame-options",
"referrer-policy",
// add more http headers if you need
// XXXbz don't add content-location support without reading bug
// 238654 and its dependencies/dups first.
0
};
nsAutoCString headerVal;
const char *const *name = headers;
while (*name) {
rv =
httpChannel->GetResponseHeader(nsDependentCString(*name), headerVal);
if (NS_SUCCEEDED(rv) && !headerVal.IsEmpty()) {
nsCOMPtr<nsIAtom> key = NS_Atomize(*name);
SetHeaderData(key, NS_ConvertASCIItoUTF16(headerVal));
}
++name;
}
} else {
nsCOMPtr<nsIFileChannel> fileChannel = do_QueryInterface(aChannel);
if (fileChannel) {
nsCOMPtr<nsIFile> file;
fileChannel->GetFile(getter_AddRefs(file));
if (file) {
PRTime msecs;
rv = file->GetLastModifiedTime(&msecs);
if (NS_SUCCEEDED(rv)) {
modDate = msecs * int64_t(PR_USEC_PER_MSEC);
}
}
} else {
nsAutoCString contentDisp;
rv = aChannel->GetContentDispositionHeader(contentDisp);
if (NS_SUCCEEDED(rv)) {
SetHeaderData(nsGkAtoms::headerContentDisposition,
NS_ConvertASCIItoUTF16(contentDisp));
}
}
}
mLastModified.Truncate();
if (modDate != 0) {
GetFormattedTimeString(modDate, mLastModified);
}
}
already_AddRefed<Element>
nsDocument::CreateElem(const nsAString& aName, nsIAtom *aPrefix,
int32_t aNamespaceID, const nsAString* aIs)
{
#ifdef DEBUG
nsAutoString qName;
if (aPrefix) {
aPrefix->ToString(qName);
qName.Append(':');
}
qName.Append(aName);
// Note: "a:b:c" is a valid name in non-namespaces XML, and
// nsDocument::CreateElement can call us with such a name and no prefix,
// which would cause an error if we just used true here.
bool nsAware = aPrefix != nullptr || aNamespaceID != GetDefaultNamespaceID();
NS_ASSERTION(NS_SUCCEEDED(nsContentUtils::CheckQName(qName, nsAware)),
"Don't pass invalid prefixes to nsDocument::CreateElem, "
"check caller.");
#endif
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
mNodeInfoManager->GetNodeInfo(aName, aPrefix, aNamespaceID,
nsIDOMNode::ELEMENT_NODE,
getter_AddRefs(nodeInfo));
NS_ENSURE_TRUE(nodeInfo, nullptr);
nsCOMPtr<Element> element;
nsresult rv = NS_NewElement(getter_AddRefs(element), nodeInfo.forget(),
NOT_FROM_PARSER, aIs);
return NS_SUCCEEDED(rv) ? element.forget() : nullptr;
}
bool
nsDocument::IsSafeToFlush() const
{
nsIPresShell* shell = GetShell();
if (!shell)
return true;
return shell->IsSafeToFlush();
}
void
nsDocument::Sanitize()
{
// Sanitize the document by resetting all password fields and any form
// fields with autocomplete=off to their default values. We do this now,
// instead of when the presentation is restored, to offer some protection
// in case there is ever an exploit that allows a cached document to be
// accessed from a different document.
// First locate all input elements, regardless of whether they are
// in a form, and reset the password and autocomplete=off elements.
RefPtr<nsContentList> nodes = GetElementsByTagName(NS_LITERAL_STRING("input"));
nsAutoString value;
uint32_t length = nodes->Length(true);
for (uint32_t i = 0; i < length; ++i) {
NS_ASSERTION(nodes->Item(i), "null item in node list!");
RefPtr<HTMLInputElement> input = HTMLInputElement::FromContentOrNull(nodes->Item(i));
if (!input)
continue;
bool resetValue = false;
input->GetAttribute(NS_LITERAL_STRING("autocomplete"), value);
if (value.LowerCaseEqualsLiteral("off")) {
resetValue = true;
} else {
input->GetType(value);
if (value.LowerCaseEqualsLiteral("password"))
resetValue = true;
}
if (resetValue) {
input->Reset();
}
}
// Now locate all _form_ elements that have autocomplete=off and reset them
nodes = GetElementsByTagName(NS_LITERAL_STRING("form"));
length = nodes->Length(true);
for (uint32_t i = 0; i < length; ++i) {
NS_ASSERTION(nodes->Item(i), "null item in nodelist");
nsCOMPtr<nsIDOMHTMLFormElement> form = do_QueryInterface(nodes->Item(i));
if (!form)
continue;
nodes->Item(i)->AsElement()->GetAttr(kNameSpaceID_None,
nsGkAtoms::autocomplete, value);
if (value.LowerCaseEqualsLiteral("off"))
form->Reset();
}
}
struct SubDocEnumArgs
{
nsIDocument::nsSubDocEnumFunc callback;
void *data;
};
void
nsDocument::EnumerateSubDocuments(nsSubDocEnumFunc aCallback, void *aData)
{
if (!mSubDocuments) {
return;
}
// PLDHashTable::Iterator can't handle modifications while iterating so we
// copy all entries to an array first before calling any callbacks.
AutoTArray<nsCOMPtr<nsIDocument>, 8> subdocs;
for (auto iter = mSubDocuments->Iter(); !iter.Done(); iter.Next()) {
auto entry = static_cast<SubDocMapEntry*>(iter.Get());
nsIDocument* subdoc = entry->mSubDocument;
if (subdoc) {
subdocs.AppendElement(subdoc);
}
}
for (auto subdoc : subdocs) {
if (!aCallback(subdoc, aData)) {
break;
}
}
}
#ifdef DEBUG_bryner
#define DEBUG_PAGE_CACHE
#endif
bool
nsDocument::CanSavePresentation(nsIRequest *aNewRequest)
{
if (EventHandlingSuppressed()) {
return false;
}
nsPIDOMWindowInner* win = GetInnerWindow();
if (win && win->TimeoutSuspendCount()) {
return false;
}
// Check our event listener manager for unload/beforeunload listeners.
nsCOMPtr<EventTarget> piTarget = do_QueryInterface(mScriptGlobalObject);
if (piTarget) {
EventListenerManager* manager = piTarget->GetExistingListenerManager();
if (manager && manager->HasUnloadListeners()) {
return false;
}
}
// Check if we have pending network requests
nsCOMPtr<nsILoadGroup> loadGroup = GetDocumentLoadGroup();
if (loadGroup) {
nsCOMPtr<nsISimpleEnumerator> requests;
loadGroup->GetRequests(getter_AddRefs(requests));
bool hasMore = false;
// We want to bail out if we have any requests other than aNewRequest (or
// in the case when aNewRequest is a part of a multipart response the base
// channel the multipart response is coming in on).
nsCOMPtr<nsIChannel> baseChannel;
nsCOMPtr<nsIMultiPartChannel> part(do_QueryInterface(aNewRequest));
if (part) {
part->GetBaseChannel(getter_AddRefs(baseChannel));
}
while (NS_SUCCEEDED(requests->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> elem;
requests->GetNext(getter_AddRefs(elem));
nsCOMPtr<nsIRequest> request = do_QueryInterface(elem);
if (request && request != aNewRequest && request != baseChannel) {
#ifdef DEBUG_PAGE_CACHE
nsAutoCString requestName, docSpec;
request->GetName(requestName);
if (mDocumentURI)
mDocumentURI->GetSpec(docSpec);
printf("document %s has request %s\n",
docSpec.get(), requestName.get());
#endif
return false;
}
}
}
// Check if we have active GetUserMedia use
if (MediaManager::Exists() && win &&
MediaManager::Get()->IsWindowStillActive(win->WindowID())) {
return false;
}
#ifdef MOZ_WEBRTC
// Check if we have active PeerConnections
nsCOMPtr<IPeerConnectionManager> pcManager =
do_GetService(IPEERCONNECTION_MANAGER_CONTRACTID);
if (pcManager && win) {
bool active;
pcManager->HasActivePeerConnection(win->WindowID(), &active);
if (active) {
return false;
}
}
#endif // MOZ_WEBRTC
// Don't save presentations for documents containing EME content, so that
// CDMs reliably shutdown upon user navigation.
if (ContainsEMEContent()) {
return false;
}
// Don't save presentations for documents containing MSE content, to
// reduce memory usage.
if (ContainsMSEContent()) {
return false;
}
// Don't save presentation if there are active FlyWeb connections or FlyWeb
// servers.
FlyWebService* flyWebService = FlyWebService::GetExisting();
if (flyWebService && flyWebService->HasConnectionOrServer(win->WindowID())) {
return false;
}
if (mSubDocuments) {
for (auto iter = mSubDocuments->Iter(); !iter.Done(); iter.Next()) {
auto entry = static_cast<SubDocMapEntry*>(iter.Get());
nsIDocument* subdoc = entry->mSubDocument;
// The aIgnoreRequest we were passed is only for us, so don't pass it on.
bool canCache = subdoc ? subdoc->CanSavePresentation(nullptr) : false;
if (!canCache) {
return false;
}
}
}
#ifdef MOZ_WEBSPEECH
if (win) {
auto* globalWindow = nsGlobalWindow::Cast(win);
if (globalWindow->HasActiveSpeechSynthesis()) {
return false;
}
}
#endif
return true;
}
void
nsDocument::Destroy()
{
// The ContentViewer wants to release the document now. So, tell our content
// to drop any references to the document so that it can be destroyed.
if (mIsGoingAway)
return;
mIsGoingAway = true;
SetScriptGlobalObject(nullptr);
RemovedFromDocShell();
bool oldVal = mInUnlinkOrDeletion;
mInUnlinkOrDeletion = true;
uint32_t i, count = mChildren.ChildCount();
for (i = 0; i < count; ++i) {
mChildren.ChildAt(i)->DestroyContent();
}
mInUnlinkOrDeletion = oldVal;
mLayoutHistoryState = nullptr;
// Shut down our external resource map. We might not need this for
// leak-fixing if we fix nsDocumentViewer to do cycle-collection, but
// tearing down all those frame trees right now is the right thing to do.
mExternalResourceMap.Shutdown();
}
void
nsDocument::RemovedFromDocShell()
{
if (mRemovedFromDocShell)
return;
mRemovedFromDocShell = true;
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
uint32_t i, count = mChildren.ChildCount();
for (i = 0; i < count; ++i) {
mChildren.ChildAt(i)->SaveSubtreeState();
}
}
already_AddRefed<nsILayoutHistoryState>
nsDocument::GetLayoutHistoryState() const
{
nsCOMPtr<nsILayoutHistoryState> state;
if (!mScriptGlobalObject) {
state = mLayoutHistoryState;
} else {
nsCOMPtr<nsIDocShell> docShell(mDocumentContainer);
if (docShell) {
docShell->GetLayoutHistoryState(getter_AddRefs(state));
}
}
return state.forget();
}
void
nsDocument::EnsureOnloadBlocker()
{
// If mScriptGlobalObject is null, we shouldn't be messing with the loadgroup
// -- it's not ours.
if (mOnloadBlockCount != 0 && mScriptGlobalObject) {
nsCOMPtr<nsILoadGroup> loadGroup = GetDocumentLoadGroup();
if (loadGroup) {
// Check first to see if mOnloadBlocker is in the loadgroup.
nsCOMPtr<nsISimpleEnumerator> requests;
loadGroup->GetRequests(getter_AddRefs(requests));
bool hasMore = false;
while (NS_SUCCEEDED(requests->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> elem;
requests->GetNext(getter_AddRefs(elem));
nsCOMPtr<nsIRequest> request = do_QueryInterface(elem);
if (request && request == mOnloadBlocker) {
return;
}
}
// Not in the loadgroup, so add it.
loadGroup->AddRequest(mOnloadBlocker, nullptr);
}
}
}
void
nsDocument::AsyncBlockOnload()
{
while (mAsyncOnloadBlockCount) {
--mAsyncOnloadBlockCount;
BlockOnload();
}
}
void
nsDocument::BlockOnload()
{
if (mDisplayDocument) {
mDisplayDocument->BlockOnload();
return;
}
// If mScriptGlobalObject is null, we shouldn't be messing with the loadgroup
// -- it's not ours.
if (mOnloadBlockCount == 0 && mScriptGlobalObject) {
if (!nsContentUtils::IsSafeToRunScript()) {
// Because AddRequest may lead to OnStateChange calls in chrome,
// block onload only when there are no script blockers.
++mAsyncOnloadBlockCount;
if (mAsyncOnloadBlockCount == 1) {
nsContentUtils::AddScriptRunner(
NewRunnableMethod(this, &nsDocument::AsyncBlockOnload));
}
return;
}
nsCOMPtr<nsILoadGroup> loadGroup = GetDocumentLoadGroup();
if (loadGroup) {
loadGroup->AddRequest(mOnloadBlocker, nullptr);
}
}
++mOnloadBlockCount;
}
void
nsDocument::UnblockOnload(bool aFireSync)
{
if (mDisplayDocument) {
mDisplayDocument->UnblockOnload(aFireSync);
return;
}
if (mOnloadBlockCount == 0 && mAsyncOnloadBlockCount == 0) {
NS_NOTREACHED("More UnblockOnload() calls than BlockOnload() calls; dropping call");
return;
}
--mOnloadBlockCount;
if (mOnloadBlockCount == 0) {
if (mScriptGlobalObject) {
// Only manipulate the loadgroup in this case, because if mScriptGlobalObject
// is null, it's not ours.
if (aFireSync && mAsyncOnloadBlockCount == 0) {
// Increment mOnloadBlockCount, since DoUnblockOnload will decrement it
++mOnloadBlockCount;
DoUnblockOnload();
} else {
PostUnblockOnloadEvent();
}
} else if (mIsBeingUsedAsImage) {
// To correctly unblock onload for a document that contains an SVG
// image, we need to know when all of the SVG document's resources are
// done loading, in a way comparable to |window.onload|. We fire this
// event to indicate that the SVG should be considered fully loaded.
// Because scripting is disabled on SVG-as-image documents, this event
// is not accessible to content authors. (See bug 837315.)
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this,
NS_LITERAL_STRING("MozSVGAsImageDocumentLoad"),
false,
false);
asyncDispatcher->PostDOMEvent();
}
}
}
class nsUnblockOnloadEvent : public Runnable {
public:
explicit nsUnblockOnloadEvent(nsDocument* aDoc) : mDoc(aDoc) {}
NS_IMETHOD Run() override {
mDoc->DoUnblockOnload();
return NS_OK;
}
private:
RefPtr<nsDocument> mDoc;
};
void
nsDocument::PostUnblockOnloadEvent()
{
nsCOMPtr<nsIRunnable> evt = new nsUnblockOnloadEvent(this);
nsresult rv = NS_DispatchToCurrentThread(evt);
if (NS_SUCCEEDED(rv)) {
// Stabilize block count so we don't post more events while this one is up
++mOnloadBlockCount;
} else {
NS_WARNING("failed to dispatch nsUnblockOnloadEvent");
}
}
void
nsDocument::DoUnblockOnload()
{
NS_PRECONDITION(!mDisplayDocument,
"Shouldn't get here for resource document");
NS_PRECONDITION(mOnloadBlockCount != 0,
"Shouldn't have a count of zero here, since we stabilized in "
"PostUnblockOnloadEvent");
--mOnloadBlockCount;
if (mOnloadBlockCount != 0) {
// We blocked again after the last unblock. Nothing to do here. We'll
// post a new event when we unblock again.
return;
}
if (mAsyncOnloadBlockCount != 0) {
// We need to wait until the async onload block has been handled.
PostUnblockOnloadEvent();
}
// If mScriptGlobalObject is null, we shouldn't be messing with the loadgroup
// -- it's not ours.
if (mScriptGlobalObject) {
nsCOMPtr<nsILoadGroup> loadGroup = GetDocumentLoadGroup();
if (loadGroup) {
loadGroup->RemoveRequest(mOnloadBlocker, nullptr, NS_OK);
}
}
}
nsIContent*
nsDocument::GetContentInThisDocument(nsIFrame* aFrame) const
{
for (nsIFrame* f = aFrame; f;
f = nsLayoutUtils::GetParentOrPlaceholderForCrossDoc(f)) {
nsIContent* content = f->GetContent();
if (!content || content->IsInAnonymousSubtree())
continue;
if (content->OwnerDoc() == this) {
return content;
}
// We must be in a subdocument so jump directly to the root frame.
// GetParentOrPlaceholderForCrossDoc gets called immediately to jump up to
// the containing document.
f = f->PresContext()->GetPresShell()->GetRootFrame();
}
return nullptr;
}
void
nsDocument::DispatchPageTransition(EventTarget* aDispatchTarget,
const nsAString& aType,
bool aPersisted)
{
if (!aDispatchTarget) {
return;
}
PageTransitionEventInit init;
init.mBubbles = true;
init.mCancelable = true;
init.mPersisted = aPersisted;
RefPtr<PageTransitionEvent> event =
PageTransitionEvent::Constructor(this, aType, init);
event->SetTrusted(true);
event->SetTarget(this);
EventDispatcher::DispatchDOMEvent(aDispatchTarget, nullptr, event,
nullptr, nullptr);
}
static bool
NotifyPageShow(nsIDocument* aDocument, void* aData)
{
const bool* aPersistedPtr = static_cast<const bool*>(aData);
aDocument->OnPageShow(*aPersistedPtr, nullptr);
return true;
}
void
nsDocument::OnPageShow(bool aPersisted,
EventTarget* aDispatchStartTarget)
{
mVisible = true;
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
EnumerateExternalResources(NotifyPageShow, &aPersisted);
Element* root = GetRootElement();
if (aPersisted && root) {
// Send out notifications that our <link> elements are attached.
RefPtr<nsContentList> links = NS_GetContentList(root,
kNameSpaceID_XHTML,
NS_LITERAL_STRING("link"));
uint32_t linkCount = links->Length(true);
for (uint32_t i = 0; i < linkCount; ++i) {
static_cast<HTMLLinkElement*>(links->Item(i, false))->LinkAdded();
}
}
// See nsIDocument
if (!aDispatchStartTarget) {
// Set mIsShowing before firing events, in case those event handlers
// move us around.
mIsShowing = true;
}
if (mAnimationController) {
mAnimationController->OnPageShow();
}
if (aPersisted) {
SetImagesNeedAnimating(true);
}
UpdateVisibilityState();
nsCOMPtr<EventTarget> target = aDispatchStartTarget;
if (!target) {
target = do_QueryInterface(GetWindow());
}
// Dispatch observer notification to notify observers page is shown.
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
nsIPrincipal *principal = GetPrincipal();
os->NotifyObservers(static_cast<nsIDocument*>(this),
nsContentUtils::IsSystemPrincipal(principal) ?
"chrome-page-shown" :
"content-page-shown",
nullptr);
if (!mObservingAppThemeChanged) {
os->AddObserver(this, "app-theme-changed", /* ownsWeak */ false);
mObservingAppThemeChanged = true;
}
}
DispatchPageTransition(target, NS_LITERAL_STRING("pageshow"), aPersisted);
}
static bool
NotifyPageHide(nsIDocument* aDocument, void* aData)
{
const bool* aPersistedPtr = static_cast<const bool*>(aData);
aDocument->OnPageHide(*aPersistedPtr, nullptr);
return true;
}
static void
DispatchCustomEventWithFlush(nsINode* aTarget, const nsAString& aEventType,
bool aBubbles, bool aOnlyChromeDispatch)
{
RefPtr<Event> event = NS_NewDOMEvent(aTarget, nullptr, nullptr);
event->InitEvent(aEventType, aBubbles, false);
event->SetTrusted(true);
if (aOnlyChromeDispatch) {
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
}
if (nsIPresShell* shell = aTarget->OwnerDoc()->GetShell()) {
shell->GetPresContext()->
RefreshDriver()->ScheduleEventDispatch(aTarget, event);
}
}
static void
DispatchFullScreenChange(nsIDocument* aTarget)
{
DispatchCustomEventWithFlush(
aTarget, NS_LITERAL_STRING("fullscreenchange"),
/* Bubbles */ true, /* OnlyChrome */ false);
}
static void ClearPendingFullscreenRequests(nsIDocument* aDoc);
void
nsDocument::OnPageHide(bool aPersisted,
EventTarget* aDispatchStartTarget)
{
// Send out notifications that our <link> elements are detached,
// but only if this is not a full unload.
Element* root = GetRootElement();
if (aPersisted && root) {
RefPtr<nsContentList> links = NS_GetContentList(root,
kNameSpaceID_XHTML,
NS_LITERAL_STRING("link"));
uint32_t linkCount = links->Length(true);
for (uint32_t i = 0; i < linkCount; ++i) {
static_cast<HTMLLinkElement*>(links->Item(i, false))->LinkRemoved();
}
}
// See nsIDocument
if (!aDispatchStartTarget) {
// Set mIsShowing before firing events, in case those event handlers
// move us around.
mIsShowing = false;
}
if (mAnimationController) {
mAnimationController->OnPageHide();
}
// We do not stop the animations (bug 1024343)
// when the page is refreshing while being dragged out
nsDocShell* docShell = mDocumentContainer.get();
if (aPersisted && !(docShell && docShell->InFrameSwap())) {
SetImagesNeedAnimating(false);
}
ExitPointerLock();
// Now send out a PageHide event.
nsCOMPtr<EventTarget> target = aDispatchStartTarget;
if (!target) {
target = do_QueryInterface(GetWindow());
}
// Dispatch observer notification to notify observers page is hidden.
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
nsIPrincipal* principal = GetPrincipal();
os->NotifyObservers(static_cast<nsIDocument*>(this),
nsContentUtils::IsSystemPrincipal(principal) ?
"chrome-page-hidden" :
"content-page-hidden",
nullptr);
os->RemoveObserver(this, "app-theme-changed");
mObservingAppThemeChanged = false;
}
DispatchPageTransition(target, NS_LITERAL_STRING("pagehide"), aPersisted);
mVisible = false;
UpdateVisibilityState();
EnumerateExternalResources(NotifyPageHide, &aPersisted);
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
ClearPendingFullscreenRequests(this);
if (GetFullscreenElement()) {
// If this document was fullscreen, we should exit fullscreen in this
// doctree branch. This ensures that if the user navigates while in
// fullscreen mode we don't leave its still visible ancestor documents
// in fullscreen mode. So exit fullscreen in the document's fullscreen
// root document, as this will exit fullscreen in all the root's
// descendant documents. Note that documents are removed from the
// doctree by the time OnPageHide() is called, so we must store a
// reference to the root (in nsDocument::mFullscreenRoot) since we can't
// just traverse the doctree to get the root.
nsIDocument::ExitFullscreenInDocTree(this);
// Since the document is removed from the doctree before OnPageHide() is
// called, ExitFullscreen() can't traverse from the root down to *this*
// document, so we must manually call CleanupFullscreenState() below too.
// Note that CleanupFullscreenState() clears nsDocument::mFullscreenRoot,
// so we *must* call it after ExitFullscreen(), not before.
// OnPageHide() is called in every hidden (i.e. descendant) document,
// so calling CleanupFullscreenState() here will ensure all hidden
// documents have their fullscreen state reset.
CleanupFullscreenState();
// If anyone was listening to this document's state, advertizing the state
// change would be the least of the politeness.
DispatchFullScreenChange(this);
}
}
void
nsDocument::WillDispatchMutationEvent(nsINode* aTarget)
{
NS_ASSERTION(mSubtreeModifiedDepth != 0 ||
mSubtreeModifiedTargets.Count() == 0,
"mSubtreeModifiedTargets not cleared after dispatching?");
++mSubtreeModifiedDepth;
if (aTarget) {
// MayDispatchMutationEvent is often called just before this method,
// so it has already appended the node to mSubtreeModifiedTargets.
int32_t count = mSubtreeModifiedTargets.Count();
if (!count || mSubtreeModifiedTargets[count - 1] != aTarget) {
mSubtreeModifiedTargets.AppendObject(aTarget);
}
}
}
void
nsDocument::MutationEventDispatched(nsINode* aTarget)
{
--mSubtreeModifiedDepth;
if (mSubtreeModifiedDepth == 0) {
int32_t count = mSubtreeModifiedTargets.Count();
if (!count) {
return;
}
nsPIDOMWindowInner* window = GetInnerWindow();
if (window &&
!window->HasMutationListeners(NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED)) {
mSubtreeModifiedTargets.Clear();
return;
}
nsCOMArray<nsINode> realTargets;
for (int32_t i = 0; i < count; ++i) {
nsINode* possibleTarget = mSubtreeModifiedTargets[i];
nsCOMPtr<nsIContent> content = do_QueryInterface(possibleTarget);
if (content && content->ChromeOnlyAccess()) {
continue;
}
nsINode* commonAncestor = nullptr;
int32_t realTargetCount = realTargets.Count();
for (int32_t j = 0; j < realTargetCount; ++j) {
commonAncestor =
nsContentUtils::GetCommonAncestor(possibleTarget, realTargets[j]);
if (commonAncestor) {
realTargets.ReplaceObjectAt(commonAncestor, j);
break;
}
}
if (!commonAncestor) {
realTargets.AppendObject(possibleTarget);
}
}
mSubtreeModifiedTargets.Clear();
int32_t realTargetCount = realTargets.Count();
for (int32_t k = 0; k < realTargetCount; ++k) {
InternalMutationEvent mutation(true, eLegacySubtreeModified);
(new AsyncEventDispatcher(realTargets[k], mutation))->
RunDOMEventWhenSafe();
}
}
}
void
nsDocument::AddStyleRelevantLink(Link* aLink)
{
NS_ASSERTION(aLink, "Passing in a null link. Expect crashes RSN!");
#ifdef DEBUG
nsPtrHashKey<Link>* entry = mStyledLinks.GetEntry(aLink);
NS_ASSERTION(!entry, "Document already knows about this Link!");
mStyledLinksCleared = false;
#endif
(void)mStyledLinks.PutEntry(aLink);
}
void
nsDocument::ForgetLink(Link* aLink)
{
NS_ASSERTION(aLink, "Passing in a null link. Expect crashes RSN!");
#ifdef DEBUG
nsPtrHashKey<Link>* entry = mStyledLinks.GetEntry(aLink);
NS_ASSERTION(entry || mStyledLinksCleared,
"Document knows nothing about this Link!");
#endif
mStyledLinks.RemoveEntry(aLink);
}
void
nsDocument::DestroyElementMaps()
{
#ifdef DEBUG
mStyledLinksCleared = true;
#endif
mStyledLinks.Clear();
mIdentifierMap.Clear();
++mExpandoAndGeneration.generation;
}
void
nsDocument::RefreshLinkHrefs()
{
// Get a list of all links we know about. We will reset them, which will
// remove them from the document, so we need a copy of what is in the
// hashtable.
LinkArray linksToNotify(mStyledLinks.Count());
for (auto iter = mStyledLinks.ConstIter(); !iter.Done(); iter.Next()) {
linksToNotify.AppendElement(iter.Get()->GetKey());
}
// Reset all of our styled links.
nsAutoScriptBlocker scriptBlocker;
for (LinkArray::size_type i = 0; i < linksToNotify.Length(); i++) {
linksToNotify[i]->ResetLinkState(true, linksToNotify[i]->ElementHasHref());
}
}
nsresult
nsDocument::CloneDocHelper(nsDocument* clone) const
{
clone->mIsStaticDocument = mCreatingStaticClone;
// Init document
nsresult rv = clone->Init();
NS_ENSURE_SUCCESS(rv, rv);
if (mCreatingStaticClone) {
nsCOMPtr<nsILoadGroup> loadGroup;
// |mDocumentContainer| is the container of the document that is being
// created and not the original container. See CreateStaticClone function().
nsCOMPtr<nsIDocumentLoader> docLoader(mDocumentContainer);
if (docLoader) {
docLoader->GetLoadGroup(getter_AddRefs(loadGroup));
}
nsCOMPtr<nsIChannel> channel = GetChannel();
nsCOMPtr<nsIURI> uri;
if (channel) {
NS_GetFinalChannelURI(channel, getter_AddRefs(uri));
} else {
uri = nsIDocument::GetDocumentURI();
}
clone->mChannel = channel;
if (uri) {
clone->ResetToURI(uri, loadGroup, NodePrincipal());
}
clone->SetContainer(mDocumentContainer);
}
// Now ensure that our clone has the same URI, base URI, and principal as us.
// We do this after the mCreatingStaticClone block above, because that block
// can set the base URI to an incorrect value in cases when base URI
// information came from the channel. So we override explicitly, and do it
// for all these properties, in case ResetToURI messes with any of the rest of
// them.
clone->nsDocument::SetDocumentURI(nsIDocument::GetDocumentURI());
clone->SetChromeXHRDocURI(mChromeXHRDocURI);
clone->SetPrincipal(NodePrincipal());
clone->mDocumentBaseURI = mDocumentBaseURI;
clone->SetChromeXHRDocBaseURI(mChromeXHRDocBaseURI);
// Set scripting object
bool hasHadScriptObject = true;
nsIScriptGlobalObject* scriptObject =
GetScriptHandlingObject(hasHadScriptObject);
NS_ENSURE_STATE(scriptObject || !hasHadScriptObject);
if (scriptObject) {
clone->SetScriptHandlingObject(scriptObject);
} else {
clone->SetScopeObject(GetScopeObject());
}
// Make the clone a data document
clone->SetLoadedAsData(true);
// Misc state
// State from nsIDocument
clone->mCharacterSet = mCharacterSet;
clone->mCharacterSetSource = mCharacterSetSource;
clone->mCompatMode = mCompatMode;
clone->mBidiOptions = mBidiOptions;
clone->mContentLanguage = mContentLanguage;
clone->SetContentTypeInternal(GetContentTypeInternal());
clone->mSecurityInfo = mSecurityInfo;
// State from nsDocument
clone->mType = mType;
clone->mXMLDeclarationBits = mXMLDeclarationBits;
clone->mBaseTarget = mBaseTarget;
return NS_OK;
}
void
nsDocument::SetReadyStateInternal(ReadyState rs)
{
mReadyState = rs;
if (rs == READYSTATE_UNINITIALIZED) {
// Transition back to uninitialized happens only to keep assertions happy
// right before readyState transitions to something else. Make this
// transition undetectable by Web content.
return;
}
if (mTiming) {
switch (rs) {
case READYSTATE_LOADING:
mTiming->NotifyDOMLoading(nsIDocument::GetDocumentURI());
break;
case READYSTATE_INTERACTIVE:
mTiming->NotifyDOMInteractive(nsIDocument::GetDocumentURI());
break;
case READYSTATE_COMPLETE:
mTiming->NotifyDOMComplete(nsIDocument::GetDocumentURI());
break;
default:
NS_WARNING("Unexpected ReadyState value");
break;
}
}
// At the time of loading start, we don't have timing object, record time.
if (READYSTATE_LOADING == rs) {
mLoadingTimeStamp = mozilla::TimeStamp::Now();
}
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, NS_LITERAL_STRING("readystatechange"),
false, false);
asyncDispatcher->RunDOMEventWhenSafe();
}
NS_IMETHODIMP
nsDocument::GetReadyState(nsAString& aReadyState)
{
nsIDocument::GetReadyState(aReadyState);
return NS_OK;
}
void
nsIDocument::GetReadyState(nsAString& aReadyState) const
{
switch(mReadyState) {
case READYSTATE_LOADING :
aReadyState.AssignLiteral(u"loading");
break;
case READYSTATE_INTERACTIVE :
aReadyState.AssignLiteral(u"interactive");
break;
case READYSTATE_COMPLETE :
aReadyState.AssignLiteral(u"complete");
break;
default:
aReadyState.AssignLiteral(u"uninitialized");
}
}
namespace {
struct SuppressArgs
{
nsIDocument::SuppressionType mWhat;
uint32_t mIncrease;
};
} // namespace
static bool
SuppressEventHandlingInDocument(nsIDocument* aDocument, void* aData)
{
SuppressArgs* args = static_cast<SuppressArgs*>(aData);
aDocument->SuppressEventHandling(args->mWhat, args->mIncrease);
return true;
}
void
nsDocument::SuppressEventHandling(nsIDocument::SuppressionType aWhat,
uint32_t aIncrease)
{
if (mEventsSuppressed == 0 && mAnimationsPaused == 0 &&
aIncrease != 0 && mPresShell && mScriptGlobalObject) {
RevokeAnimationFrameNotifications();
}
if (aWhat == eAnimationsOnly) {
mAnimationsPaused += aIncrease;
} else {
mEventsSuppressed += aIncrease;
for (uint32_t i = 0; i < aIncrease; ++i) {
ScriptLoader()->AddExecuteBlocker();
}
}
SuppressArgs args = { aWhat, aIncrease };
EnumerateSubDocuments(SuppressEventHandlingInDocument, &args);
}
static void
FireOrClearDelayedEvents(nsTArray<nsCOMPtr<nsIDocument> >& aDocuments,
bool aFireEvents)
{
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm)
return;
for (uint32_t i = 0; i < aDocuments.Length(); ++i) {
// NB: Don't bother trying to fire delayed events on documents that were
// closed before this event ran.
if (!aDocuments[i]->EventHandlingSuppressed()) {
fm->FireDelayedEvents(aDocuments[i]);
nsCOMPtr<nsIPresShell> shell = aDocuments[i]->GetShell();
if (shell) {
// Only fire events for active documents.
bool fire = aFireEvents &&
aDocuments[i]->GetInnerWindow() &&
aDocuments[i]->GetInnerWindow()->IsCurrentInnerWindow();
shell->FireOrClearDelayedEvents(fire);
}
}
}
}
void
nsDocument::PreloadPictureOpened()
{
mPreloadPictureDepth++;
}
void
nsDocument::PreloadPictureClosed()
{
mPreloadPictureDepth--;
if (mPreloadPictureDepth == 0) {
mPreloadPictureFoundSource.SetIsVoid(true);
} else {
MOZ_ASSERT(mPreloadPictureDepth >= 0);
}
}
void
nsDocument::PreloadPictureImageSource(const nsAString& aSrcsetAttr,
const nsAString& aSizesAttr,
const nsAString& aTypeAttr,
const nsAString& aMediaAttr)
{
// Nested pictures are not valid syntax, so while we'll eventually load them,
// it's not worth tracking sources mixed between nesting levels to preload
// them effectively.
if (mPreloadPictureDepth == 1 && mPreloadPictureFoundSource.IsVoid()) {
// <picture> selects the first matching source, so if this returns a URI we
// needn't consider new sources until a new <picture> is encountered.
bool found =
HTMLImageElement::SelectSourceForTagWithAttrs(this, true, NullString(),
aSrcsetAttr, aSizesAttr,
aTypeAttr, aMediaAttr,
mPreloadPictureFoundSource);
if (found && mPreloadPictureFoundSource.IsVoid()) {
// Found an empty source, which counts
mPreloadPictureFoundSource.SetIsVoid(false);
}
}
}
already_AddRefed<nsIURI>
nsDocument::ResolvePreloadImage(nsIURI *aBaseURI,
const nsAString& aSrcAttr,
const nsAString& aSrcsetAttr,
const nsAString& aSizesAttr)
{
nsString sourceURL;
if (mPreloadPictureDepth == 1 && !mPreloadPictureFoundSource.IsVoid()) {
// We're in a <picture> element and found a URI from a source previous to
// this image, use it.
sourceURL = mPreloadPictureFoundSource;
} else {
// Otherwise try to use this <img> as a source
HTMLImageElement::SelectSourceForTagWithAttrs(this, false, aSrcAttr,
aSrcsetAttr, aSizesAttr,
NullString(), NullString(),
sourceURL);
}
// Empty sources are not loaded by <img> (i.e. not resolved to the baseURI)
if (sourceURL.IsEmpty()) {
return nullptr;
}
// Construct into URI using passed baseURI (the parser may know of base URI
// changes that have not reached us)
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(uri), sourceURL,
this, aBaseURI);
if (NS_FAILED(rv)) {
return nullptr;
}
// We don't clear mPreloadPictureFoundSource because subsequent <img> tags in
// this this <picture> share the same <sources> (though this is not valid per
// spec)
return uri.forget();
}
void
nsDocument::MaybePreLoadImage(nsIURI* uri, const nsAString &aCrossOriginAttr,
ReferrerPolicy aReferrerPolicy)
{
// Early exit if the img is already present in the img-cache
// which indicates that the "real" load has already started and
// that we shouldn't preload it.
int16_t blockingStatus;
if (nsContentUtils::IsImageInCache(uri, static_cast<nsIDocument *>(this)) ||
!nsContentUtils::CanLoadImage(uri, static_cast<nsIDocument *>(this),
this, NodePrincipal(), &blockingStatus,
nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD)) {
return;
}
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL;
switch (Element::StringToCORSMode(aCrossOriginAttr)) {
case CORS_NONE:
// Nothing to do
break;
case CORS_ANONYMOUS:
loadFlags |= imgILoader::LOAD_CORS_ANONYMOUS;
break;
case CORS_USE_CREDENTIALS:
loadFlags |= imgILoader::LOAD_CORS_USE_CREDENTIALS;
break;
default:
MOZ_CRASH("Unknown CORS mode!");
}
// Image not in cache - trigger preload
RefPtr<imgRequestProxy> request;
nsresult rv =
nsContentUtils::LoadImage(uri,
static_cast<nsINode*>(this),
this,
NodePrincipal(),
mDocumentURI, // uri of document used as referrer
aReferrerPolicy,
nullptr, // no observer
loadFlags,
NS_LITERAL_STRING("img"),
getter_AddRefs(request),
nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD);
// Pin image-reference to avoid evicting it from the img-cache before
// the "real" load occurs. Unpinned in DispatchContentLoadedEvents and
// unlink
if (NS_SUCCEEDED(rv)) {
mPreloadingImages.Put(uri, request.forget());
}
}
void
nsDocument::MaybePreconnect(nsIURI* aOrigURI, mozilla::CORSMode aCORSMode)
{
nsCOMPtr<nsIURI> uri;
if (NS_FAILED(aOrigURI->Clone(getter_AddRefs(uri)))) {
return;
}
// The URI created here is used in 2 contexts. One is nsISpeculativeConnect
// which ignores the path and uses only the origin. The other is for the
// document mPreloadedPreconnects de-duplication hash. Anonymous vs
// non-Anonymous preconnects create different connections on the wire and
// therefore should not be considred duplicates of each other and we
// normalize the path before putting it in the hash to accomplish that.
if (aCORSMode == CORS_ANONYMOUS) {
uri->SetPath(NS_LITERAL_CSTRING("/anonymous"));
} else {
uri->SetPath(NS_LITERAL_CSTRING("/"));
}
if (mPreloadedPreconnects.Contains(uri)) {
return;
}
mPreloadedPreconnects.Put(uri, true);
nsCOMPtr<nsISpeculativeConnect>
speculator(do_QueryInterface(nsContentUtils::GetIOService()));
if (!speculator) {
return;
}
if (aCORSMode == CORS_ANONYMOUS) {
speculator->SpeculativeAnonymousConnect(uri, nullptr);
} else {
speculator->SpeculativeConnect(uri, nullptr);
}
}
void
nsDocument::ForgetImagePreload(nsIURI* aURI)
{
// Checking count is faster than hashing the URI in the common
// case of empty table.
if (mPreloadingImages.Count() != 0) {
nsCOMPtr<imgIRequest> req;
mPreloadingImages.Remove(aURI, getter_AddRefs(req));
if (req) {
// Make sure to cancel the request so imagelib knows it's gone.
req->CancelAndForgetObserver(NS_BINDING_ABORTED);
}
}
}
EventStates
nsDocument::GetDocumentState()
{
if (!mGotDocumentState.HasState(NS_DOCUMENT_STATE_RTL_LOCALE)) {
if (IsDocumentRightToLeft()) {
mDocumentState |= NS_DOCUMENT_STATE_RTL_LOCALE;
}
mGotDocumentState |= NS_DOCUMENT_STATE_RTL_LOCALE;
}
if (!mGotDocumentState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE)) {
nsIPresShell* shell = GetShell();
if (shell && shell->GetPresContext() &&
shell->GetPresContext()->IsTopLevelWindowInactive()) {
mDocumentState |= NS_DOCUMENT_STATE_WINDOW_INACTIVE;
}
mGotDocumentState |= NS_DOCUMENT_STATE_WINDOW_INACTIVE;
}
return mDocumentState;
}
namespace {
/**
* Stub for LoadSheet(), since all we want is to get the sheet into
* the CSSLoader's style cache
*/
class StubCSSLoaderObserver final : public nsICSSLoaderObserver {
~StubCSSLoaderObserver() {}
public:
NS_IMETHOD
StyleSheetLoaded(StyleSheet*, bool, nsresult) override
{
return NS_OK;
}
NS_DECL_ISUPPORTS
};
NS_IMPL_ISUPPORTS(StubCSSLoaderObserver, nsICSSLoaderObserver)
} // namespace
void
nsDocument::PreloadStyle(nsIURI* uri, const nsAString& charset,
const nsAString& aCrossOriginAttr,
const ReferrerPolicy aReferrerPolicy,
const nsAString& aIntegrity)
{
// The CSSLoader will retain this object after we return.
nsCOMPtr<nsICSSLoaderObserver> obs = new StubCSSLoaderObserver();
// Charset names are always ASCII.
CSSLoader()->LoadSheet(uri, true, NodePrincipal(),
NS_LossyConvertUTF16toASCII(charset),
obs,
Element::StringToCORSMode(aCrossOriginAttr),
aReferrerPolicy, aIntegrity);
}
nsresult
nsDocument::LoadChromeSheetSync(nsIURI* uri, bool isAgentSheet,
RefPtr<mozilla::StyleSheet>* aSheet)
{
css::SheetParsingMode mode =
isAgentSheet ? css::eAgentSheetFeatures
: css::eAuthorSheetFeatures;
return CSSLoader()->LoadSheetSync(uri, mode, isAgentSheet, aSheet);
}
class nsDelayedEventDispatcher : public Runnable
{
public:
explicit nsDelayedEventDispatcher(nsTArray<nsCOMPtr<nsIDocument>>& aDocuments)
{
mDocuments.SwapElements(aDocuments);
}
virtual ~nsDelayedEventDispatcher() {}
NS_IMETHOD Run() override
{
FireOrClearDelayedEvents(mDocuments, true);
return NS_OK;
}
private:
nsTArray<nsCOMPtr<nsIDocument> > mDocuments;
};
namespace {
struct UnsuppressArgs
{
explicit UnsuppressArgs(nsIDocument::SuppressionType aWhat)
: mWhat(aWhat)
{
}
nsIDocument::SuppressionType mWhat;
nsTArray<nsCOMPtr<nsIDocument>> mDocs;
};
} // namespace
static bool
GetAndUnsuppressSubDocuments(nsIDocument* aDocument,
void* aData)
{
UnsuppressArgs* args = static_cast<UnsuppressArgs*>(aData);
if (args->mWhat != nsIDocument::eAnimationsOnly &&
aDocument->EventHandlingSuppressed() > 0) {
static_cast<nsDocument*>(aDocument)->DecreaseEventSuppression();
aDocument->ScriptLoader()->RemoveExecuteBlocker();
} else if (args->mWhat == nsIDocument::eAnimationsOnly &&
aDocument->AnimationsPaused()) {
static_cast<nsDocument*>(aDocument)->ResumeAnimations();
}
if (args->mWhat != nsIDocument::eAnimationsOnly) {
// No need to remember documents if we only care about animation frames.
args->mDocs.AppendElement(aDocument);
}
aDocument->EnumerateSubDocuments(GetAndUnsuppressSubDocuments, aData);
return true;
}
void
nsDocument::UnsuppressEventHandlingAndFireEvents(nsIDocument::SuppressionType aWhat,
bool aFireEvents)
{
UnsuppressArgs args(aWhat);
GetAndUnsuppressSubDocuments(this, &args);
if (aWhat == nsIDocument::eAnimationsOnly) {
// No need to fire events if we only care about animations here.
return;
}
if (aFireEvents) {
NS_DispatchToCurrentThread(new nsDelayedEventDispatcher(args.mDocs));
} else {
FireOrClearDelayedEvents(args.mDocs, false);
}
}
nsISupports*
nsDocument::GetCurrentContentSink()
{
return mParser ? mParser->GetContentSink() : nullptr;
}
nsIDocument*
nsDocument::GetTemplateContentsOwner()
{
if (!mTemplateContentsOwner) {
bool hasHadScriptObject = true;
nsIScriptGlobalObject* scriptObject =
GetScriptHandlingObject(hasHadScriptObject);
nsCOMPtr<nsIDOMDocument> domDocument;
nsresult rv = NS_NewDOMDocument(getter_AddRefs(domDocument),
EmptyString(), // aNamespaceURI
EmptyString(), // aQualifiedName
nullptr, // aDoctype
nsIDocument::GetDocumentURI(),
nsIDocument::GetDocBaseURI(),
NodePrincipal(),
true, // aLoadedAsData
scriptObject, // aEventObject
DocumentFlavorHTML);
NS_ENSURE_SUCCESS(rv, nullptr);
mTemplateContentsOwner = do_QueryInterface(domDocument);
NS_ENSURE_TRUE(mTemplateContentsOwner, nullptr);
nsDocument* doc = static_cast<nsDocument*>(mTemplateContentsOwner.get());
if (!scriptObject) {
mTemplateContentsOwner->SetScopeObject(GetScopeObject());
}
doc->mHasHadScriptHandlingObject = hasHadScriptObject;
// Set |doc| as the template contents owner of itself so that
// |doc| is the template contents owner of template elements created
// by |doc|.
doc->mTemplateContentsOwner = doc;
}
return mTemplateContentsOwner;
}
void
nsDocument::SetScrollToRef(nsIURI *aDocumentURI)
{
if (!aDocumentURI) {
return;
}
nsAutoCString ref;
// Since all URI's that pass through here aren't URL's we can't
// rely on the nsIURI implementation for providing a way for
// finding the 'ref' part of the URI, we'll haveto revert to
// string routines for finding the data past '#'
nsresult rv = aDocumentURI->GetSpec(ref);
if (NS_FAILED(rv)) {
Unused << aDocumentURI->GetRef(mScrollToRef);
return;
}
nsReadingIterator<char> start, end;
ref.BeginReading(start);
ref.EndReading(end);
if (FindCharInReadable('#', start, end)) {
++start; // Skip over the '#'
mScrollToRef = Substring(start, end);
}
}
void
nsDocument::ScrollToRef()
{
if (mScrolledToRefAlready) {
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
shell->ScrollToAnchor();
}
return;
}
if (mScrollToRef.IsEmpty()) {
return;
}
char* tmpstr = ToNewCString(mScrollToRef);
if (!tmpstr) {
return;
}
nsUnescape(tmpstr);
nsAutoCString unescapedRef;
unescapedRef.Assign(tmpstr);
free(tmpstr);
nsresult rv = NS_ERROR_FAILURE;
// We assume that the bytes are in UTF-8, as it says in the spec:
// http://www.w3.org/TR/html4/appendix/notes.html#h-B.2.1
NS_ConvertUTF8toUTF16 ref(unescapedRef);
nsCOMPtr<nsIPresShell> shell = GetShell();
if (shell) {
// Check an empty string which might be caused by the UTF-8 conversion
if (!ref.IsEmpty()) {
// Note that GoToAnchor will handle flushing layout as needed.
rv = shell->GoToAnchor(ref, mChangeScrollPosWhenScrollingToRef);
} else {
rv = NS_ERROR_FAILURE;
}
// If UTF-8 URI failed then try to assume the string as a
// document's charset.
if (NS_FAILED(rv)) {
const nsACString &docCharset = GetDocumentCharacterSet();
rv = nsContentUtils::ConvertStringFromEncoding(docCharset,
unescapedRef,
ref);
if (NS_SUCCEEDED(rv) && !ref.IsEmpty()) {
rv = shell->GoToAnchor(ref, mChangeScrollPosWhenScrollingToRef);
}
}
if (NS_SUCCEEDED(rv)) {
mScrolledToRefAlready = true;
}
}
}
void
nsDocument::ResetScrolledToRefAlready()
{
mScrolledToRefAlready = false;
}
void
nsDocument::SetChangeScrollPosWhenScrollingToRef(bool aValue)
{
mChangeScrollPosWhenScrollingToRef = aValue;
}
void
nsIDocument::RegisterActivityObserver(nsISupports* aSupports)
{
if (!mActivityObservers) {
mActivityObservers = new nsTHashtable<nsPtrHashKey<nsISupports> >();
}
mActivityObservers->PutEntry(aSupports);
}
bool
nsIDocument::UnregisterActivityObserver(nsISupports* aSupports)
{
if (!mActivityObservers) {
return false;
}
nsPtrHashKey<nsISupports>* entry = mActivityObservers->GetEntry(aSupports);
if (!entry) {
return false;
}
mActivityObservers->RemoveEntry(entry);
return true;
}
void
nsIDocument::EnumerateActivityObservers(ActivityObserverEnumerator aEnumerator,
void* aData)
{
if (!mActivityObservers)
return;
for (auto iter = mActivityObservers->ConstIter(); !iter.Done();
iter.Next()) {
aEnumerator(iter.Get()->GetKey(), aData);
}
}
void
nsIDocument::RegisterPendingLinkUpdate(Link* aLink)
{
MOZ_ASSERT(!mIsLinkUpdateRegistrationsForbidden);
mLinksToUpdate.PutEntry(aLink);
mHasLinksToUpdate = true;
}
void
nsIDocument::UnregisterPendingLinkUpdate(Link* aLink)
{
MOZ_ASSERT(!mIsLinkUpdateRegistrationsForbidden);
if (!mHasLinksToUpdate)
return;
mLinksToUpdate.RemoveEntry(aLink);
}
void
nsIDocument::FlushPendingLinkUpdates()
{
MOZ_ASSERT(!mIsLinkUpdateRegistrationsForbidden);
if (!mHasLinksToUpdate)
return;
#ifdef DEBUG
AutoRestore<bool> saved(mIsLinkUpdateRegistrationsForbidden);
mIsLinkUpdateRegistrationsForbidden = true;
#endif
for (auto iter = mLinksToUpdate.ConstIter(); !iter.Done(); iter.Next()) {
Link* link = iter.Get()->GetKey();
link->GetElement()->UpdateLinkState(link->LinkState());
}
mLinksToUpdate.Clear();
mHasLinksToUpdate = false;
}
already_AddRefed<nsIDocument>
nsIDocument::CreateStaticClone(nsIDocShell* aCloneContainer)
{
nsDocument* thisAsDoc = static_cast<nsDocument*>(this);
mCreatingStaticClone = true;
// Make document use different container during cloning.
RefPtr<nsDocShell> originalShell = mDocumentContainer.get();
SetContainer(static_cast<nsDocShell*>(aCloneContainer));
nsCOMPtr<nsIDOMNode> clonedNode;
nsresult rv = thisAsDoc->CloneNode(true, 1, getter_AddRefs(clonedNode));
SetContainer(originalShell);
RefPtr<nsDocument> clonedDoc;
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIDocument> tmp = do_QueryInterface(clonedNode);
if (tmp) {
clonedDoc = static_cast<nsDocument*>(tmp.get());
if (IsStaticDocument()) {
clonedDoc->mOriginalDocument = mOriginalDocument;
} else {
clonedDoc->mOriginalDocument = this;
}
clonedDoc->mOriginalDocument->mStaticCloneCount++;
int32_t sheetsCount = GetNumberOfStyleSheets();
for (int32_t i = 0; i < sheetsCount; ++i) {
RefPtr<StyleSheet> sheet = GetStyleSheetAt(i);
if (sheet) {
if (sheet->IsApplicable()) {
// XXXheycam Need to make ServoStyleSheet cloning work.
if (sheet->IsGecko()) {
RefPtr<CSSStyleSheet> clonedSheet =
sheet->AsGecko()->Clone(nullptr, nullptr, clonedDoc, nullptr);
NS_WARNING_ASSERTION(clonedSheet,
"Cloning a stylesheet didn't work!");
if (clonedSheet) {
clonedDoc->AddStyleSheet(clonedSheet);
}
} else {
NS_ERROR("stylo: ServoStyleSheet doesn't support cloning");
}
}
}
}
// Iterate backwards to maintain order
for (StyleSheet* sheet : Reversed(thisAsDoc->mOnDemandBuiltInUASheets)) {
if (sheet) {
if (sheet->IsApplicable()) {
// XXXheycam Need to make ServoStyleSheet cloning work.
if (sheet->IsGecko()) {
RefPtr<CSSStyleSheet> clonedSheet =
sheet->AsGecko()->Clone(nullptr, nullptr, clonedDoc, nullptr);
NS_WARNING_ASSERTION(clonedSheet,
"Cloning a stylesheet didn't work!");
if (clonedSheet) {
clonedDoc->AddOnDemandBuiltInUASheet(clonedSheet);
}
} else {
NS_ERROR("stylo: ServoStyleSheet doesn't support cloning");
}
}
}
}
}
}
mCreatingStaticClone = false;
return clonedDoc.forget();
}
void
nsIDocument::UnlinkOriginalDocumentIfStatic()
{
if (IsStaticDocument() && mOriginalDocument) {
MOZ_ASSERT(mOriginalDocument->mStaticCloneCount > 0);
mOriginalDocument->mStaticCloneCount--;
mOriginalDocument = nullptr;
}
MOZ_ASSERT(!mOriginalDocument);
}
nsresult
nsIDocument::ScheduleFrameRequestCallback(FrameRequestCallback& aCallback,
int32_t *aHandle)
{
if (mFrameRequestCallbackCounter == INT32_MAX) {
// Can't increment without overflowing; bail out
return NS_ERROR_NOT_AVAILABLE;
}
int32_t newHandle = ++mFrameRequestCallbackCounter;
bool alreadyRegistered = !mFrameRequestCallbacks.IsEmpty();
DebugOnly<FrameRequest*> request =
mFrameRequestCallbacks.AppendElement(FrameRequest(aCallback, newHandle));
NS_ASSERTION(request, "This is supposed to be infallible!");
if (!alreadyRegistered && mPresShell && IsEventHandlingEnabled() &&
!AnimationsPaused()) {
mPresShell->GetPresContext()->RefreshDriver()->
ScheduleFrameRequestCallbacks(this);
}
*aHandle = newHandle;
return NS_OK;
}
void
nsIDocument::CancelFrameRequestCallback(int32_t aHandle)
{
// mFrameRequestCallbacks is stored sorted by handle
if (mFrameRequestCallbacks.RemoveElementSorted(aHandle) &&
mFrameRequestCallbacks.IsEmpty() &&
mPresShell && IsEventHandlingEnabled()) {
mPresShell->GetPresContext()->RefreshDriver()->
RevokeFrameRequestCallbacks(this);
}
}
nsresult
nsDocument::GetStateObject(nsIVariant** aState)
{
// Get the document's current state object. This is the object backing both
// history.state and popStateEvent.state.
//
// mStateObjectContainer may be null; this just means that there's no
// current state object.
if (!mStateObjectCached && mStateObjectContainer) {
AutoJSContext cx;
nsIGlobalObject* sgo = GetScopeObject();
NS_ENSURE_TRUE(sgo, NS_ERROR_UNEXPECTED);
JS::Rooted<JSObject*> global(cx, sgo->GetGlobalJSObject());
NS_ENSURE_TRUE(global, NS_ERROR_UNEXPECTED);
JSAutoCompartment ac(cx, global);
mStateObjectContainer->
DeserializeToVariant(cx, getter_AddRefs(mStateObjectCached));
}
NS_IF_ADDREF(*aState = mStateObjectCached);
return NS_OK;
}
nsDOMNavigationTiming*
nsDocument::GetNavigationTiming() const
{
return mTiming;
}
nsresult
nsDocument::SetNavigationTiming(nsDOMNavigationTiming* aTiming)
{
mTiming = aTiming;
if (!mLoadingTimeStamp.IsNull() && mTiming) {
mTiming->SetDOMLoadingTimeStamp(nsIDocument::GetDocumentURI(), mLoadingTimeStamp);
}
return NS_OK;
}
Element*
nsDocument::FindImageMap(const nsAString& aUseMapValue)
{
if (aUseMapValue.IsEmpty()) {
return nullptr;
}
nsAString::const_iterator start, end;
aUseMapValue.BeginReading(start);
aUseMapValue.EndReading(end);
int32_t hash = aUseMapValue.FindChar('#');
if (hash < 0) {
return nullptr;
}
// aUsemap contains a '#', set start to point right after the '#'
start.advance(hash + 1);
if (start == end) {
return nullptr; // aUsemap == "#"
}
const nsAString& mapName = Substring(start, end);
if (!mImageMaps) {
mImageMaps = new nsContentList(this, kNameSpaceID_XHTML, nsGkAtoms::map, nsGkAtoms::map);
}
uint32_t i, n = mImageMaps->Length(true);
nsString name;
for (i = 0; i < n; ++i) {
nsIContent* map = mImageMaps->Item(i);
if (map->AttrValueIs(kNameSpaceID_None, nsGkAtoms::id, mapName,
eCaseMatters) ||
(map->GetAttr(kNameSpaceID_None, nsGkAtoms::name, name) &&
mapName.Equals(name, nsCaseInsensitiveStringComparator()))) {
return map->AsElement();
}
}
return nullptr;
}
#define DEPRECATED_OPERATION(_op) #_op "Warning",
static const char* kDeprecationWarnings[] = {
#include "nsDeprecatedOperationList.h"
nullptr
};
#undef DEPRECATED_OPERATION
#define DOCUMENT_WARNING(_op) #_op "Warning",
static const char* kDocumentWarnings[] = {
#include "nsDocumentWarningList.h"
nullptr
};
#undef DOCUMENT_WARNING
static UseCounter
OperationToUseCounter(nsIDocument::DeprecatedOperations aOperation)
{
switch(aOperation) {
#define DEPRECATED_OPERATION(_op) \
case nsIDocument::e##_op: return eUseCounter_##_op;
#include "nsDeprecatedOperationList.h"
#undef DEPRECATED_OPERATION
default:
MOZ_CRASH();
}
}
bool
nsIDocument::HasWarnedAbout(DeprecatedOperations aOperation) const
{
return mDeprecationWarnedAbout[aOperation];
}
void
nsIDocument::WarnOnceAbout(DeprecatedOperations aOperation,
bool asError /* = false */) const
{
MOZ_ASSERT(NS_IsMainThread());
if (HasWarnedAbout(aOperation)) {
return;
}
mDeprecationWarnedAbout[aOperation] = true;
const_cast<nsIDocument*>(this)->SetDocumentAndPageUseCounter(OperationToUseCounter(aOperation));
uint32_t flags = asError ? nsIScriptError::errorFlag
: nsIScriptError::warningFlag;
nsContentUtils::ReportToConsole(flags,
NS_LITERAL_CSTRING("DOM Core"), this,
nsContentUtils::eDOM_PROPERTIES,
kDeprecationWarnings[aOperation]);
}
bool
nsIDocument::HasWarnedAbout(DocumentWarnings aWarning) const
{
return mDocWarningWarnedAbout[aWarning];
}
void
nsIDocument::WarnOnceAbout(DocumentWarnings aWarning,
bool asError /* = false */,
const char16_t **aParams /* = nullptr */,
uint32_t aParamsLength /* = 0 */) const
{
MOZ_ASSERT(NS_IsMainThread());
if (HasWarnedAbout(aWarning)) {
return;
}
mDocWarningWarnedAbout[aWarning] = true;
uint32_t flags = asError ? nsIScriptError::errorFlag
: nsIScriptError::warningFlag;
nsContentUtils::ReportToConsole(flags,
NS_LITERAL_CSTRING("DOM Core"), this,
nsContentUtils::eDOM_PROPERTIES,
kDocumentWarnings[aWarning],
aParams,
aParamsLength);
}
nsresult
nsDocument::AddImage(imgIRequest* aImage)
{
NS_ENSURE_ARG_POINTER(aImage);
// See if the image is already in the hashtable. If it is, get the old count.
uint32_t oldCount = 0;
mImageTracker.Get(aImage, &oldCount);
// Put the image in the hashtable, with the proper count.
mImageTracker.Put(aImage, oldCount + 1);
nsresult rv = NS_OK;
// If this is the first insertion and we're locking images, lock this image
// too.
if (oldCount == 0 && mLockingImages) {
rv = aImage->LockImage();
}
// If this is the first insertion and we're animating images, request
// that this image be animated too.
if (oldCount == 0 && mAnimatingImages) {
nsresult rv2 = aImage->IncrementAnimationConsumers();
rv = NS_SUCCEEDED(rv) ? rv2 : rv;
}
return rv;
}
nsresult
nsDocument::RemoveImage(imgIRequest* aImage, uint32_t aFlags)
{
NS_ENSURE_ARG_POINTER(aImage);
// Get the old count. It should exist and be > 0.
uint32_t count = 0;
DebugOnly<bool> found = mImageTracker.Get(aImage, &count);
MOZ_ASSERT(found, "Removing image that wasn't in the tracker!");
MOZ_ASSERT(count > 0, "Entry in the cache tracker with count 0!");
// We're removing, so decrement the count.
count--;
// If the count is now zero, remove from the tracker.
// Otherwise, set the new value.
if (count != 0) {
mImageTracker.Put(aImage, count);
return NS_OK;
}
mImageTracker.Remove(aImage);
nsresult rv = NS_OK;
// Now that we're no longer tracking this image, unlock it if we'd
// previously locked it.
if (mLockingImages) {
rv = aImage->UnlockImage();
}
// If we're animating images, remove our request to animate this one.
if (mAnimatingImages) {
nsresult rv2 = aImage->DecrementAnimationConsumers();
rv = NS_SUCCEEDED(rv) ? rv2 : rv;
}
if (aFlags & REQUEST_DISCARD) {
// Request that the image be discarded if nobody else holds a lock on it.
// Do this even if !mLockingImages, because even if we didn't just unlock
// this image, it might still be a candidate for discarding.
aImage->RequestDiscard();
}
return rv;
}
nsresult
nsDocument::AddPlugin(nsIObjectLoadingContent* aPlugin)
{
MOZ_ASSERT(aPlugin);
if (!mPlugins.PutEntry(aPlugin)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
void
nsDocument::RemovePlugin(nsIObjectLoadingContent* aPlugin)
{
MOZ_ASSERT(aPlugin);
mPlugins.RemoveEntry(aPlugin);
}
static bool
AllSubDocumentPluginEnum(nsIDocument* aDocument, void* userArg)
{
nsTArray<nsIObjectLoadingContent*>* plugins =
reinterpret_cast< nsTArray<nsIObjectLoadingContent*>* >(userArg);
MOZ_ASSERT(plugins);
aDocument->GetPlugins(*plugins);
return true;
}
void
nsDocument::GetPlugins(nsTArray<nsIObjectLoadingContent*>& aPlugins)
{
aPlugins.SetCapacity(aPlugins.Length() + mPlugins.Count());
for (auto iter = mPlugins.ConstIter(); !iter.Done(); iter.Next()) {
aPlugins.AppendElement(iter.Get()->GetKey());
}
EnumerateSubDocuments(AllSubDocumentPluginEnum, &aPlugins);
}
nsresult
nsDocument::AddResponsiveContent(nsIContent* aContent)
{
MOZ_ASSERT(aContent);
MOZ_ASSERT(aContent->IsHTMLElement(nsGkAtoms::img));
mResponsiveContent.PutEntry(aContent);
return NS_OK;
}
void
nsDocument::RemoveResponsiveContent(nsIContent* aContent)
{
MOZ_ASSERT(aContent);
mResponsiveContent.RemoveEntry(aContent);
}
void
nsDocument::NotifyMediaFeatureValuesChanged()
{
for (auto iter = mResponsiveContent.ConstIter(); !iter.Done();
iter.Next()) {
nsCOMPtr<nsIContent> content = iter.Get()->GetKey();
if (content->IsHTMLElement(nsGkAtoms::img)) {
auto* imageElement = static_cast<HTMLImageElement*>(content.get());
imageElement->MediaFeatureValuesChanged();
}
}
}
nsresult
nsDocument::SetImageLockingState(bool aLocked)
{
if (XRE_IsContentProcess() &&
!Preferences::GetBool("image.mem.allow_locking_in_content_processes", true)) {
return NS_OK;
}
// If there's no change, there's nothing to do.
if (mLockingImages == aLocked)
return NS_OK;
// Otherwise, iterate over our images and perform the appropriate action.
for (auto iter = mImageTracker.Iter(); !iter.Done(); iter.Next()) {
imgIRequest* image = iter.Key();
if (aLocked) {
image->LockImage();
} else {
image->UnlockImage();
}
}
// Update state.
mLockingImages = aLocked;
return NS_OK;
}
void
nsDocument::SetImagesNeedAnimating(bool aAnimating)
{
// If there's no change, there's nothing to do.
if (mAnimatingImages == aAnimating)
return;
// Otherwise, iterate over our images and perform the appropriate action.
for (auto iter = mImageTracker.Iter(); !iter.Done(); iter.Next()) {
imgIRequest* image = iter.Key();
if (aAnimating) {
image->IncrementAnimationConsumers();
} else {
image->DecrementAnimationConsumers();
}
}
// Update state.
mAnimatingImages = aAnimating;
}
already_AddRefed<Touch>
nsIDocument::CreateTouch(nsGlobalWindow* aView,
EventTarget* aTarget,
int32_t aIdentifier,
int32_t aPageX, int32_t aPageY,
int32_t aScreenX, int32_t aScreenY,
int32_t aClientX, int32_t aClientY,
int32_t aRadiusX, int32_t aRadiusY,
float aRotationAngle,
float aForce)
{
MOZ_ASSERT_IF(aView, aView->IsInnerWindow());
RefPtr<Touch> touch = new Touch(aTarget,
aIdentifier,
aPageX, aPageY,
aScreenX, aScreenY,
aClientX, aClientY,
aRadiusX, aRadiusY,
aRotationAngle,
aForce);
return touch.forget();
}
already_AddRefed<TouchList>
nsIDocument::CreateTouchList()
{
RefPtr<TouchList> retval = new TouchList(ToSupports(this));
return retval.forget();
}
already_AddRefed<TouchList>
nsIDocument::CreateTouchList(Touch& aTouch,
const Sequence<OwningNonNull<Touch> >& aTouches)
{
RefPtr<TouchList> retval = new TouchList(ToSupports(this));
retval->Append(&aTouch);
for (uint32_t i = 0; i < aTouches.Length(); ++i) {
retval->Append(aTouches[i].get());
}
return retval.forget();
}
already_AddRefed<TouchList>
nsIDocument::CreateTouchList(const Sequence<OwningNonNull<Touch> >& aTouches)
{
RefPtr<TouchList> retval = new TouchList(ToSupports(this));
for (uint32_t i = 0; i < aTouches.Length(); ++i) {
retval->Append(aTouches[i].get());
}
return retval.forget();
}
already_AddRefed<nsDOMCaretPosition>
nsIDocument::CaretPositionFromPoint(float aX, float aY)
{
nscoord x = nsPresContext::CSSPixelsToAppUnits(aX);
nscoord y = nsPresContext::CSSPixelsToAppUnits(aY);
nsPoint pt(x, y);
FlushPendingNotifications(Flush_Layout);
nsIPresShell *ps = GetShell();
if (!ps) {
return nullptr;
}
nsIFrame *rootFrame = ps->GetRootFrame();
// XUL docs, unlike HTML, have no frame tree until everything's done loading
if (!rootFrame) {
return nullptr;
}
nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, pt,
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
if (!ptFrame) {
return nullptr;
}
// GetContentOffsetsFromPoint requires frame-relative coordinates, so we need
// to adjust to frame-relative coordinates before we can perform this call.
// It should also not take into account the padding of the frame.
nsPoint adjustedPoint = pt - ptFrame->GetOffsetTo(rootFrame);
nsFrame::ContentOffsets offsets =
ptFrame->GetContentOffsetsFromPoint(adjustedPoint);
nsCOMPtr<nsIContent> node = offsets.content;
uint32_t offset = offsets.offset;
nsCOMPtr<nsIContent> anonNode = node;
bool nodeIsAnonymous = node && node->IsInNativeAnonymousSubtree();
if (nodeIsAnonymous) {
node = ptFrame->GetContent();
nsIContent* nonanon = node->FindFirstNonChromeOnlyAccessContent();
nsCOMPtr<nsIDOMHTMLTextAreaElement> textArea = do_QueryInterface(nonanon);
nsITextControlFrame* textFrame = do_QueryFrame(nonanon->GetPrimaryFrame());
nsNumberControlFrame* numberFrame = do_QueryFrame(nonanon->GetPrimaryFrame());
if (textFrame || numberFrame) {
// If the anonymous content node has a child, then we need to make sure
// that we get the appropriate child, as otherwise the offset may not be
// correct when we construct a range for it.
nsCOMPtr<nsIContent> firstChild = anonNode->GetFirstChild();
if (firstChild) {
anonNode = firstChild;
}
if (textArea) {
offset = nsContentUtils::GetAdjustedOffsetInTextControl(ptFrame, offset);
}
node = nonanon;
} else {
node = nullptr;
offset = 0;
}
}
RefPtr<nsDOMCaretPosition> aCaretPos = new nsDOMCaretPosition(node, offset);
if (nodeIsAnonymous) {
aCaretPos->SetAnonymousContentNode(anonNode);
}
return aCaretPos.forget();
}
NS_IMETHODIMP
nsDocument::CaretPositionFromPoint(float aX, float aY, nsISupports** aCaretPos)
{
NS_ENSURE_ARG_POINTER(aCaretPos);
*aCaretPos = nsIDocument::CaretPositionFromPoint(aX, aY).take();
return NS_OK;
}
static bool
IsPotentiallyScrollable(HTMLBodyElement* aBody)
{
// An element is potentially scrollable if all of the following conditions are
// true:
// The element has an associated CSS layout box.
nsIFrame* bodyFrame = aBody->GetPrimaryFrame();
if (!bodyFrame) {
return false;
}
// The element is not the HTML body element, or it is and the root element's
// used value of the overflow-x or overflow-y properties is not visible.
MOZ_ASSERT(aBody->GetParent() == aBody->OwnerDoc()->GetRootElement());
nsIFrame* parentFrame = aBody->GetParent()->GetPrimaryFrame();
if (parentFrame &&
parentFrame->StyleDisplay()->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE &&
parentFrame->StyleDisplay()->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE) {
return false;
}
// The element's used value of the overflow-x or overflow-y properties is not
// visible.
if (bodyFrame->StyleDisplay()->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE &&
bodyFrame->StyleDisplay()->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE) {
return false;
}
return true;
}
Element*
nsIDocument::GetScrollingElement()
{
if (GetCompatibilityMode() == eCompatibility_NavQuirks) {
FlushPendingNotifications(Flush_Layout);
HTMLBodyElement* body = GetBodyElement();
if (body && !IsPotentiallyScrollable(body)) {
return body;
}
return nullptr;
}
return GetRootElement();
}
void
nsIDocument::ObsoleteSheet(nsIURI *aSheetURI, ErrorResult& rv)
{
nsresult res = CSSLoader()->ObsoleteSheet(aSheetURI);
if (NS_FAILED(res)) {
rv.Throw(res);
}
}
void
nsIDocument::ObsoleteSheet(const nsAString& aSheetURI, ErrorResult& rv)
{
nsCOMPtr<nsIURI> uri;
nsresult res = NS_NewURI(getter_AddRefs(uri), aSheetURI);
if (NS_FAILED(res)) {
rv.Throw(res);
return;
}
res = CSSLoader()->ObsoleteSheet(uri);
if (NS_FAILED(res)) {
rv.Throw(res);
}
}
already_AddRefed<nsIURI>
nsIDocument::GetMozDocumentURIIfNotForErrorPages()
{
if (mFailedChannel) {
nsCOMPtr<nsIURI> failedURI;
if (NS_SUCCEEDED(mFailedChannel->GetURI(getter_AddRefs(failedURI)))) {
return failedURI.forget();
}
}
nsCOMPtr<nsIURI> uri = GetDocumentURIObject();
if (!uri) {
return nullptr;
}
return uri.forget();
}
nsIHTMLCollection*
nsIDocument::Children()
{
if (!mChildrenCollection) {
mChildrenCollection = new nsContentList(this, kNameSpaceID_Wildcard,
nsGkAtoms::_asterisk,
nsGkAtoms::_asterisk,
false);
}
return mChildrenCollection;
}
uint32_t
nsIDocument::ChildElementCount()
{
return Children()->Length();
}
namespace mozilla {
// Singleton class to manage the list of fullscreen documents which are the
// root of a branch which contains fullscreen documents. We maintain this list
// so that we can easily exit all windows from fullscreen when the user
// presses the escape key.
class FullscreenRoots {
public:
// Adds the root of given document to the manager. Calling this method
// with a document whose root is already contained has no effect.
static void Add(nsIDocument* aDoc);
// Iterates over every root in the root list, and calls aFunction, passing
// each root once to aFunction. It is safe to call Add() and Remove() while
// iterating over the list (i.e. in aFunction). Documents that are removed
// from the manager during traversal are not traversed, and documents that
// are added to the manager during traversal are also not traversed.
static void ForEach(void(*aFunction)(nsIDocument* aDoc));
// Removes the root of a specific document from the manager.
static void Remove(nsIDocument* aDoc);
// Returns true if all roots added to the list have been removed.
static bool IsEmpty();
private:
FullscreenRoots() {
MOZ_COUNT_CTOR(FullscreenRoots);
}
~FullscreenRoots() {
MOZ_COUNT_DTOR(FullscreenRoots);
}
enum {
NotFound = uint32_t(-1)
};
// Looks in mRoots for aRoot. Returns the index if found, otherwise NotFound.
static uint32_t Find(nsIDocument* aRoot);
// Returns true if aRoot is in the list of fullscreen roots.
static bool Contains(nsIDocument* aRoot);
// Singleton instance of the FullscreenRoots. This is instantiated when a
// root is added, and it is deleted when the last root is removed.
static FullscreenRoots* sInstance;
// List of weak pointers to roots.
nsTArray<nsWeakPtr> mRoots;
};
FullscreenRoots* FullscreenRoots::sInstance = nullptr;
/* static */
void
FullscreenRoots::ForEach(void(*aFunction)(nsIDocument* aDoc))
{
if (!sInstance) {
return;
}
// Create a copy of the roots array, and iterate over the copy. This is so
// that if an element is removed from mRoots we don't mess up our iteration.
nsTArray<nsWeakPtr> roots(sInstance->mRoots);
// Call aFunction on all entries.
for (uint32_t i = 0; i < roots.Length(); i++) {
nsCOMPtr<nsIDocument> root = do_QueryReferent(roots[i]);
// Check that the root isn't in the manager. This is so that new additions
// while we were running don't get traversed.
if (root && FullscreenRoots::Contains(root)) {
aFunction(root);
}
}
}
/* static */
bool
FullscreenRoots::Contains(nsIDocument* aRoot)
{
return FullscreenRoots::Find(aRoot) != NotFound;
}
/* static */
void
FullscreenRoots::Add(nsIDocument* aDoc)
{
nsCOMPtr<nsIDocument> root = nsContentUtils::GetRootDocument(aDoc);
if (!FullscreenRoots::Contains(root)) {
if (!sInstance) {
sInstance = new FullscreenRoots();
}
sInstance->mRoots.AppendElement(do_GetWeakReference(root));
}
}
/* static */
uint32_t
FullscreenRoots::Find(nsIDocument* aRoot)
{
if (!sInstance) {
return NotFound;
}
nsTArray<nsWeakPtr>& roots = sInstance->mRoots;
for (uint32_t i = 0; i < roots.Length(); i++) {
nsCOMPtr<nsIDocument> otherRoot(do_QueryReferent(roots[i]));
if (otherRoot == aRoot) {
return i;
}
}
return NotFound;
}
/* static */
void
FullscreenRoots::Remove(nsIDocument* aDoc)
{
nsCOMPtr<nsIDocument> root = nsContentUtils::GetRootDocument(aDoc);
uint32_t index = Find(root);
NS_ASSERTION(index != NotFound,
"Should only try to remove roots which are still added!");
if (index == NotFound || !sInstance) {
return;
}
sInstance->mRoots.RemoveElementAt(index);
if (sInstance->mRoots.IsEmpty()) {
delete sInstance;
sInstance = nullptr;
}
}
/* static */
bool
FullscreenRoots::IsEmpty()
{
return !sInstance;
}
} // end namespace mozilla.
using mozilla::FullscreenRoots;
nsIDocument*
nsDocument::GetFullscreenRoot()
{
nsCOMPtr<nsIDocument> root = do_QueryReferent(mFullscreenRoot);
return root;
}
void
nsDocument::SetFullscreenRoot(nsIDocument* aRoot)
{
mFullscreenRoot = do_GetWeakReference(aRoot);
}
NS_IMETHODIMP
nsDocument::MozCancelFullScreen()
{
nsIDocument::ExitFullscreen();
return NS_OK;
}
void
nsIDocument::ExitFullscreen()
{
RestorePreviousFullScreenState();
}
static void
AskWindowToExitFullscreen(nsIDocument* aDoc)
{
if (XRE_GetProcessType() == GeckoProcessType_Content) {
nsContentUtils::DispatchEventOnlyToChrome(
aDoc, ToSupports(aDoc), NS_LITERAL_STRING("MozDOMFullscreen:Exit"),
/* Bubbles */ true, /* Cancelable */ false,
/* DefaultAction */ nullptr);
} else {
if (nsPIDOMWindowOuter* win = aDoc->GetWindow()) {
win->SetFullscreenInternal(FullscreenReason::ForFullscreenAPI, false);
}
}
}
class nsCallExitFullscreen : public Runnable
{
public:
explicit nsCallExitFullscreen(nsIDocument* aDoc)
: mDoc(aDoc) {}
NS_IMETHOD Run() override final
{
if (!mDoc) {
FullscreenRoots::ForEach(&AskWindowToExitFullscreen);
} else {
AskWindowToExitFullscreen(mDoc);
}
return NS_OK;
}
private:
nsCOMPtr<nsIDocument> mDoc;
};
/* static */ void
nsIDocument::AsyncExitFullscreen(nsIDocument* aDoc)
{
NS_DispatchToCurrentThread(new nsCallExitFullscreen(aDoc));
}
static bool
CountFullscreenSubDocuments(nsIDocument* aDoc, void* aData)
{
if (aDoc->GetFullscreenElement()) {
uint32_t* count = static_cast<uint32_t*>(aData);
(*count)++;
}
return true;
}
static uint32_t
CountFullscreenSubDocuments(nsIDocument* aDoc)
{
uint32_t count = 0;
aDoc->EnumerateSubDocuments(CountFullscreenSubDocuments, &count);
return count;
}
bool
nsDocument::IsFullscreenLeaf()
{
// A fullscreen leaf document is fullscreen, and has no fullscreen
// subdocuments.
if (!GetFullscreenElement()) {
return false;
}
return CountFullscreenSubDocuments(this) == 0;
}
static bool
ResetFullScreen(nsIDocument* aDocument, void* aData)
{
if (aDocument->GetFullscreenElement()) {
NS_ASSERTION(CountFullscreenSubDocuments(aDocument) <= 1,
"Should have at most 1 fullscreen subdocument.");
static_cast<nsDocument*>(aDocument)->CleanupFullscreenState();
NS_ASSERTION(!aDocument->GetFullscreenElement(),
"Should reset full-screen");
auto changed = reinterpret_cast<nsCOMArray<nsIDocument>*>(aData);
changed->AppendElement(aDocument);
aDocument->EnumerateSubDocuments(ResetFullScreen, aData);
}
return true;
}
// Since nsIDocument::ExitFullscreenInDocTree() could be called from
// Element::UnbindFromTree() where it is not safe to synchronously run
// script. This runnable is the script part of that function.
class ExitFullscreenScriptRunnable : public Runnable
{
public:
explicit ExitFullscreenScriptRunnable(nsCOMArray<nsIDocument>&& aDocuments)
: mDocuments(Move(aDocuments)) { }
NS_IMETHOD Run() override
{
// Dispatch MozDOMFullscreen:Exited to the last document in
// the list since we want this event to follow the same path
// MozDOMFullscreen:Entered dispatched.
nsIDocument* lastDocument = mDocuments[mDocuments.Length() - 1];
nsContentUtils::DispatchEventOnlyToChrome(
lastDocument, ToSupports(lastDocument),
NS_LITERAL_STRING("MozDOMFullscreen:Exited"),
/* Bubbles */ true, /* Cancelable */ false, /* DefaultAction */ nullptr);
// Ensure the window exits fullscreen.
if (nsPIDOMWindowOuter* win = mDocuments[0]->GetWindow()) {
win->SetFullscreenInternal(FullscreenReason::ForForceExitFullscreen, false);
}
return NS_OK;
}
private:
nsCOMArray<nsIDocument> mDocuments;
};
/* static */ void
nsIDocument::ExitFullscreenInDocTree(nsIDocument* aMaybeNotARootDoc)
{
MOZ_ASSERT(aMaybeNotARootDoc);
// Unlock the pointer
UnlockPointer();
nsCOMPtr<nsIDocument> root = aMaybeNotARootDoc->GetFullscreenRoot();
if (!root || !root->GetFullscreenElement()) {
// If a document was detached before exiting from fullscreen, it is
// possible that the root had left fullscreen state. In this case,
// we would not get anything from the ResetFullScreen() call. Root's
// not being a fullscreen doc also means the widget should have
// exited fullscreen state. It means even if we do not return here,
// we would actually do nothing below except crashing ourselves via
// dispatching the "MozDOMFullscreen:Exited" event to an nonexistent
// document.
return;
}
// Stores a list of documents to which we must dispatch "fullscreenchange".
// We're required by the spec to dispatch the events in leaf-to-root
// order when exiting fullscreen, but we traverse the doctree in a
// root-to-leaf order, so we save references to the documents we must
// dispatch to so that we dispatch in the specified order.
nsCOMArray<nsIDocument> changed;
// Walk the tree of fullscreen documents, and reset their fullscreen state.
ResetFullScreen(root, static_cast<void*>(&changed));
// Dispatch "fullscreenchange" events. Note this loop is in reverse
// order so that the events for the leaf document arrives before the root
// document, as required by the spec.
for (uint32_t i = 0; i < changed.Length(); ++i) {
DispatchFullScreenChange(changed[changed.Length() - i - 1]);
}
NS_ASSERTION(!root->GetFullscreenElement(),
"Fullscreen root should no longer be a fullscreen doc...");
// Move the top-level window out of fullscreen mode.
FullscreenRoots::Remove(root);
nsContentUtils::AddScriptRunner(
new ExitFullscreenScriptRunnable(Move(changed)));
}
bool
GetFullscreenLeaf(nsIDocument* aDoc, void* aData)
{
if (aDoc->IsFullscreenLeaf()) {
nsIDocument** result = static_cast<nsIDocument**>(aData);
*result = aDoc;
return false;
} else if (aDoc->GetFullscreenElement()) {
aDoc->EnumerateSubDocuments(GetFullscreenLeaf, aData);
}
return true;
}
static nsIDocument*
GetFullscreenLeaf(nsIDocument* aDoc)
{
nsIDocument* leaf = nullptr;
GetFullscreenLeaf(aDoc, &leaf);
if (leaf) {
return leaf;
}
// Otherwise we could be either in a non-fullscreen doc tree, or we're
// below the fullscreen doc. Start the search from the root.
nsIDocument* root = nsContentUtils::GetRootDocument(aDoc);
// Check that the root is actually fullscreen so we don't waste time walking
// around its descendants.
if (!root->GetFullscreenElement()) {
return nullptr;
}
GetFullscreenLeaf(root, &leaf);
return leaf;
}
void
nsDocument::RestorePreviousFullScreenState()
{
NS_ASSERTION(!GetFullscreenElement() || !FullscreenRoots::IsEmpty(),
"Should have at least 1 fullscreen root when fullscreen!");
if (!GetFullscreenElement() || !GetWindow() || FullscreenRoots::IsEmpty()) {
return;
}
nsCOMPtr<nsIDocument> fullScreenDoc = GetFullscreenLeaf(this);
AutoTArray<nsDocument*, 8> exitDocs;
nsIDocument* doc = fullScreenDoc;
// Collect all subdocuments.
for (; doc != this; doc = doc->GetParentDocument()) {
exitDocs.AppendElement(static_cast<nsDocument*>(doc));
}
MOZ_ASSERT(doc == this, "Must have reached this doc");
// Collect all ancestor documents which we are going to change.
for (; doc; doc = doc->GetParentDocument()) {
nsDocument* theDoc = static_cast<nsDocument*>(doc);
MOZ_ASSERT(!theDoc->mFullScreenStack.IsEmpty(),
"Ancestor of fullscreen document must also be in fullscreen");
if (doc != this) {
Element* top = theDoc->FullScreenStackTop();
if (top->IsHTMLElement(nsGkAtoms::iframe)) {
if (static_cast<HTMLIFrameElement*>(top)->FullscreenFlag()) {
// If this is an iframe, and it explicitly requested
// fullscreen, don't rollback it automatically.
break;
}
}
}
exitDocs.AppendElement(theDoc);
if (theDoc->mFullScreenStack.Length() > 1) {
break;
}
}
nsDocument* lastDoc = exitDocs.LastElement();
if (!lastDoc->GetParentDocument() &&
lastDoc->mFullScreenStack.Length() == 1) {
// If we are fully exiting fullscreen, don't touch anything here,
// just wait for the window to get out from fullscreen first.
AskWindowToExitFullscreen(this);
return;
}
// If fullscreen mode is updated the pointer should be unlocked
UnlockPointer();
// All documents listed in the array except the last one are going to
// completely exit from the fullscreen state.
for (auto i : MakeRange(exitDocs.Length() - 1)) {
exitDocs[i]->CleanupFullscreenState();
}
// The last document will either rollback one fullscreen element, or
// completely exit from the fullscreen state as well.
nsIDocument* newFullscreenDoc;
if (lastDoc->mFullScreenStack.Length() > 1) {
lastDoc->FullScreenStackPop();
newFullscreenDoc = lastDoc;
} else {
lastDoc->CleanupFullscreenState();
newFullscreenDoc = lastDoc->GetParentDocument();
}
// Dispatch the fullscreenchange event to all document listed.
for (nsDocument* d : exitDocs) {
DispatchFullScreenChange(d);
}
MOZ_ASSERT(newFullscreenDoc, "If we were going to exit from fullscreen on "
"all documents in this doctree, we should've asked the window to "
"exit first instead of reaching here.");
if (fullScreenDoc != newFullscreenDoc &&
!nsContentUtils::HaveEqualPrincipals(fullScreenDoc, newFullscreenDoc)) {
// We've popped so enough off the stack that we've rolled back to
// a fullscreen element in a parent document. If this document is
// cross origin, dispatch an event to chrome so it knows to show
// the warning UI.
DispatchCustomEventWithFlush(
newFullscreenDoc, NS_LITERAL_STRING("MozDOMFullscreen:NewOrigin"),
/* Bubbles */ true, /* ChromeOnly */ true);
}
}
class nsCallRequestFullScreen : public Runnable
{
public:
explicit nsCallRequestFullScreen(UniquePtr<FullscreenRequest>&& aRequest)
: mRequest(Move(aRequest)) { }
NS_IMETHOD Run() override
{
mRequest->GetDocument()->RequestFullScreen(Move(mRequest));
return NS_OK;
}
UniquePtr<FullscreenRequest> mRequest;
};
void
nsDocument::AsyncRequestFullScreen(UniquePtr<FullscreenRequest>&& aRequest)
{
if (!aRequest->GetElement()) {
MOZ_ASSERT_UNREACHABLE(
"Must pass non-null element to nsDocument::AsyncRequestFullScreen");
return;
}
// Request full-screen asynchronously.
nsCOMPtr<nsIRunnable> event(new nsCallRequestFullScreen(Move(aRequest)));
NS_DispatchToCurrentThread(event);
}
void
nsIDocument::DispatchFullscreenError(const char* aMessage)
{
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this,
NS_LITERAL_STRING("fullscreenerror"),
true,
false);
asyncDispatcher->PostDOMEvent();
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"), this,
nsContentUtils::eDOM_PROPERTIES,
aMessage);
}
static void
UpdateViewportScrollbarOverrideForFullscreen(nsIDocument* aDoc)
{
if (nsIPresShell* presShell = aDoc->GetShell()) {
if (nsPresContext* presContext = presShell->GetPresContext()) {
presContext->UpdateViewportScrollbarStylesOverride();
}
}
}
static void
ClearFullscreenStateOnElement(Element* aElement)
{
// Remove styles from existing top element.
EventStateManager::SetFullScreenState(aElement, false);
// Reset iframe fullscreen flag.
if (aElement->IsHTMLElement(nsGkAtoms::iframe)) {
static_cast<HTMLIFrameElement*>(aElement)->SetFullscreenFlag(false);
}
}
void
nsDocument::CleanupFullscreenState()
{
// Iterate the fullscreen stack and clear the fullscreen states.
// Since we also need to clear the fullscreen-ancestor state, and
// currently fullscreen elements can only be placed in hierarchy
// order in the stack, reversely iterating the stack could be more
// efficient. NOTE that fullscreen-ancestor state would be removed
// in bug 1199529, and the elements may not in hierarchy order
// after bug 1195213.
for (nsWeakPtr& weakPtr : Reversed(mFullScreenStack)) {
if (nsCOMPtr<Element> element = do_QueryReferent(weakPtr)) {
ClearFullscreenStateOnElement(element);
}
}
mFullScreenStack.Clear();
mFullscreenRoot = nullptr;
UpdateViewportScrollbarOverrideForFullscreen(this);
}
bool
nsDocument::FullScreenStackPush(Element* aElement)
{
NS_ASSERTION(aElement, "Must pass non-null to FullScreenStackPush()");
Element* top = FullScreenStackTop();
if (top == aElement || !aElement) {
return false;
}
EventStateManager::SetFullScreenState(aElement, true);
mFullScreenStack.AppendElement(do_GetWeakReference(aElement));
NS_ASSERTION(GetFullscreenElement() == aElement, "Should match");
UpdateViewportScrollbarOverrideForFullscreen(this);
return true;
}
void
nsDocument::FullScreenStackPop()
{
if (mFullScreenStack.IsEmpty()) {
return;
}
ClearFullscreenStateOnElement(FullScreenStackTop());
// Remove top element. Note the remaining top element in the stack
// will not have full-screen style bits set, so we will need to restore
// them on the new top element before returning.
uint32_t last = mFullScreenStack.Length() - 1;
mFullScreenStack.RemoveElementAt(last);
// Pop from the stack null elements (references to elements which have
// been GC'd since they were added to the stack) and elements which are
// no longer in this document.
while (!mFullScreenStack.IsEmpty()) {
Element* element = FullScreenStackTop();
if (!element || !element->IsInUncomposedDoc() || element->OwnerDoc() != this) {
NS_ASSERTION(!element->State().HasState(NS_EVENT_STATE_FULL_SCREEN),
"Should have already removed full-screen styles");
uint32_t last = mFullScreenStack.Length() - 1;
mFullScreenStack.RemoveElementAt(last);
} else {
// The top element of the stack is now an in-doc element. Return here.
break;
}
}
UpdateViewportScrollbarOverrideForFullscreen(this);
}
Element*
nsDocument::FullScreenStackTop()
{
if (mFullScreenStack.IsEmpty()) {
return nullptr;
}
uint32_t last = mFullScreenStack.Length() - 1;
nsCOMPtr<Element> element(do_QueryReferent(mFullScreenStack[last]));
NS_ASSERTION(element, "Should have full-screen element!");
NS_ASSERTION(element->IsInUncomposedDoc(), "Full-screen element should be in doc");
NS_ASSERTION(element->OwnerDoc() == this, "Full-screen element should be in this doc");
return element;
}
/* virtual */ nsTArray<Element*>
nsDocument::GetFullscreenStack() const
{
nsTArray<Element*> elements;
for (const nsWeakPtr& ptr : mFullScreenStack) {
if (nsCOMPtr<Element> elem = do_QueryReferent(ptr)) {
MOZ_ASSERT(elem->State().HasState(NS_EVENT_STATE_FULL_SCREEN));
elements.AppendElement(elem);
}
}
return elements;
}
// Returns true if aDoc is in the focused tab in the active window.
static bool
IsInActiveTab(nsIDocument* aDoc)
{
nsCOMPtr<nsIDocShell> docshell = aDoc->GetDocShell();
if (!docshell) {
return false;
}
bool isActive = false;
docshell->GetIsActive(&isActive);
if (!isActive) {
return false;
}
nsCOMPtr<nsIDocShellTreeItem> rootItem;
docshell->GetRootTreeItem(getter_AddRefs(rootItem));
if (!rootItem) {
return false;
}
nsCOMPtr<nsPIDOMWindowOuter> rootWin = rootItem->GetWindow();
if (!rootWin) {
return false;
}
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm) {
return false;
}
nsCOMPtr<mozIDOMWindowProxy> activeWindow;
fm->GetActiveWindow(getter_AddRefs(activeWindow));
if (!activeWindow) {
return false;
}
return activeWindow == rootWin;
}
nsresult nsDocument::RemoteFrameFullscreenChanged(nsIDOMElement* aFrameElement)
{
// Ensure the frame element is the fullscreen element in this document.
// If the frame element is already the fullscreen element in this document,
// this has no effect.
nsCOMPtr<nsIContent> content(do_QueryInterface(aFrameElement));
auto request = MakeUnique<FullscreenRequest>(content->AsElement());
request->mIsCallerChrome = false;
request->mShouldNotifyNewOrigin = false;
RequestFullScreen(Move(request));
return NS_OK;
}
nsresult nsDocument::RemoteFrameFullscreenReverted()
{
RestorePreviousFullScreenState();
return NS_OK;
}
/* static */ bool
nsDocument::IsUnprefixedFullscreenEnabled(JSContext* aCx, JSObject* aObject)
{
MOZ_ASSERT(NS_IsMainThread());
return nsContentUtils::IsCallerChrome() ||
nsContentUtils::IsUnprefixedFullscreenApiEnabled();
}
static bool
HasFullScreenSubDocument(nsIDocument* aDoc)
{
uint32_t count = CountFullscreenSubDocuments(aDoc);
NS_ASSERTION(count <= 1, "Fullscreen docs should have at most 1 fullscreen child!");
return count >= 1;
}
// Returns nullptr if a request for Fullscreen API is currently enabled
// in the given document. Returns a static string indicates the reason
// why it is not enabled otherwise.
static const char*
GetFullscreenError(nsIDocument* aDoc, bool aCallerIsChrome)
{
if (nsContentUtils::IsFullScreenApiEnabled() && aCallerIsChrome) {
// Chrome code can always use the full-screen API, provided it's not
// explicitly disabled. Note IsCallerChrome() returns true when running
// in a Runnable, so don't use GetMozFullScreenEnabled() from a
// Runnable!
return nullptr;
}
if (!nsContentUtils::IsFullScreenApiEnabled()) {
return "FullscreenDeniedDisabled";
}
// Ensure that all containing elements are <iframe> and have
// allowfullscreen attribute set.
nsCOMPtr<nsIDocShell> docShell(aDoc->GetDocShell());
if (!docShell || !docShell->GetFullscreenAllowed()) {
return "FullscreenDeniedContainerNotAllowed";
}
return nullptr;
}
bool
nsDocument::FullscreenElementReadyCheck(Element* aElement,
bool aWasCallerChrome)
{
NS_ASSERTION(aElement,
"Must pass non-null element to nsDocument::RequestFullScreen");
if (!aElement || aElement == GetFullscreenElement()) {
return false;
}
if (!aElement->IsInUncomposedDoc()) {
DispatchFullscreenError("FullscreenDeniedNotInDocument");
return false;
}
if (aElement->OwnerDoc() != this) {
DispatchFullscreenError("FullscreenDeniedMovedDocument");
return false;
}
if (!GetWindow()) {
DispatchFullscreenError("FullscreenDeniedLostWindow");
return false;
}
if (const char* msg = GetFullscreenError(this, aWasCallerChrome)) {
DispatchFullscreenError(msg);
return false;
}
if (!IsVisible()) {
DispatchFullscreenError("FullscreenDeniedHidden");
return false;
}
if (HasFullScreenSubDocument(this)) {
DispatchFullscreenError("FullscreenDeniedSubDocFullScreen");
return false;
}
if (GetFullscreenElement() &&
!nsContentUtils::ContentIsDescendantOf(aElement, GetFullscreenElement())) {
// If this document is full-screen, only grant full-screen requests from
// a descendant of the current full-screen element.
DispatchFullscreenError("FullscreenDeniedNotDescendant");
return false;
}
if (!nsContentUtils::IsChromeDoc(this) && !IsInActiveTab(this)) {
DispatchFullscreenError("FullscreenDeniedNotFocusedTab");
return false;
}
// Deny requests when a windowed plugin is focused.
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm) {
NS_WARNING("Failed to retrieve focus manager in full-screen request.");
return false;
}
nsCOMPtr<nsIDOMElement> focusedElement;
fm->GetFocusedElement(getter_AddRefs(focusedElement));
if (focusedElement) {
nsCOMPtr<nsIContent> content = do_QueryInterface(focusedElement);
if (nsContentUtils::HasPluginWithUncontrolledEventDispatch(content)) {
DispatchFullscreenError("FullscreenDeniedFocusedPlugin");
return false;
}
}
return true;
}
FullscreenRequest::FullscreenRequest(Element* aElement)
: mElement(aElement)
, mDocument(static_cast<nsDocument*>(aElement->OwnerDoc()))
{
MOZ_COUNT_CTOR(FullscreenRequest);
}
FullscreenRequest::~FullscreenRequest()
{
MOZ_COUNT_DTOR(FullscreenRequest);
}
// Any fullscreen request waiting for the widget to finish being full-
// screen is queued here. This is declared static instead of a member
// of nsDocument because in the majority of time, there would be at most
// one document requesting fullscreen. We shouldn't waste the space to
// hold for it in every document.
class PendingFullscreenRequestList
{
public:
static void Add(UniquePtr<FullscreenRequest>&& aRequest)
{
sList.insertBack(aRequest.release());
}
static const FullscreenRequest* GetLast()
{
return sList.getLast();
}
enum IteratorOption
{
// When we are committing fullscreen changes or preparing for
// that, we generally want to iterate all requests in the same
// window with eDocumentsWithSameRoot option.
eDocumentsWithSameRoot,
// If we are removing a document from the tree, we would only
// want to remove the requests from the given document and its
// descendants. For that case, use eInclusiveDescendants.
eInclusiveDescendants
};
class Iterator
{
public:
explicit Iterator(nsIDocument* aDoc, IteratorOption aOption)
: mCurrent(PendingFullscreenRequestList::sList.getFirst())
, mRootShellForIteration(aDoc->GetDocShell())
{
if (mCurrent) {
if (mRootShellForIteration && aOption == eDocumentsWithSameRoot) {
mRootShellForIteration->
GetRootTreeItem(getter_AddRefs(mRootShellForIteration));
}
SkipToNextMatch();
}
}
void DeleteAndNext()
{
DeleteAndNextInternal();
SkipToNextMatch();
}
bool AtEnd() const { return mCurrent == nullptr; }
const FullscreenRequest& Get() const { return *mCurrent; }
private:
void DeleteAndNextInternal()
{
FullscreenRequest* thisRequest = mCurrent;
mCurrent = mCurrent->getNext();
delete thisRequest;
}
void SkipToNextMatch()
{
while (mCurrent) {
nsCOMPtr<nsIDocShellTreeItem>
docShell = mCurrent->GetDocument()->GetDocShell();
if (!docShell) {
// Always automatically drop documents which has been
// detached from the doc shell.
DeleteAndNextInternal();
} else {
while (docShell && docShell != mRootShellForIteration) {
docShell->GetParent(getter_AddRefs(docShell));
}
if (!docShell) {
// We've gone over the root, but haven't find the target
// ancestor, so skip this item.
mCurrent = mCurrent->getNext();
} else {
break;
}
}
}
}
FullscreenRequest* mCurrent;
nsCOMPtr<nsIDocShellTreeItem> mRootShellForIteration;
};
private:
PendingFullscreenRequestList() = delete;
static LinkedList<FullscreenRequest> sList;
};
/* static */ LinkedList<FullscreenRequest> PendingFullscreenRequestList::sList;
static nsCOMPtr<nsPIDOMWindowOuter>
GetRootWindow(nsIDocument* aDoc)
{
nsIDocShell* docShell = aDoc->GetDocShell();
if (!docShell) {
return nullptr;
}
nsCOMPtr<nsIDocShellTreeItem> rootItem;
docShell->GetRootTreeItem(getter_AddRefs(rootItem));
return rootItem ? rootItem->GetWindow() : nullptr;
}
static bool
ShouldApplyFullscreenDirectly(nsIDocument* aDoc,
nsPIDOMWindowOuter* aRootWin)
{
if (XRE_GetProcessType() == GeckoProcessType_Content) {
// If we are in the content process, we can apply the fullscreen
// state directly only if we have been in DOM fullscreen, because
// otherwise we always need to notify the chrome.
return !!nsContentUtils::GetRootDocument(aDoc)->GetFullscreenElement();
} else {
// If we are in the chrome process, and the window has not been in
// fullscreen, we certainly need to make that fullscreen first.
if (!aRootWin->GetFullScreen()) {
return false;
}
// The iterator not being at end indicates there is still some
// pending fullscreen request relates to this document. We have to
// push the request to the pending queue so requests are handled
// in the correct order.
PendingFullscreenRequestList::Iterator
iter(aDoc, PendingFullscreenRequestList::eDocumentsWithSameRoot);
if (!iter.AtEnd()) {
return false;
}
// We have to apply the fullscreen state directly in this case,
// because nsGlobalWindow::SetFullscreenInternal() will do nothing
// if it is already in fullscreen. If we do not apply the state but
// instead add it to the queue and wait for the window as normal,
// we would get stuck.
return true;
}
}
void
nsDocument::RequestFullScreen(UniquePtr<FullscreenRequest>&& aRequest)
{
nsCOMPtr<nsPIDOMWindowOuter> rootWin = GetRootWindow(this);
if (!rootWin) {
return;
}
if (ShouldApplyFullscreenDirectly(this, rootWin)) {
ApplyFullscreen(*aRequest);
return;
}
// We don't need to check element ready before this point, because
// if we called ApplyFullscreen, it would check that for us.
Element* elem = aRequest->GetElement();
if (!FullscreenElementReadyCheck(elem, aRequest->mIsCallerChrome)) {
return;
}
PendingFullscreenRequestList::Add(Move(aRequest));
if (XRE_GetProcessType() == GeckoProcessType_Content) {
// If we are not the top level process, dispatch an event to make
// our parent process go fullscreen first.
nsContentUtils::DispatchEventOnlyToChrome(
this, ToSupports(this), NS_LITERAL_STRING("MozDOMFullscreen:Request"),
/* Bubbles */ true, /* Cancelable */ false, /* DefaultAction */ nullptr);
} else {
// Make the window fullscreen.
rootWin->SetFullscreenInternal(FullscreenReason::ForFullscreenAPI, true);
}
}
/* static */ bool
nsIDocument::HandlePendingFullscreenRequests(nsIDocument* aDoc)
{
bool handled = false;
PendingFullscreenRequestList::Iterator iter(
aDoc, PendingFullscreenRequestList::eDocumentsWithSameRoot);
while (!iter.AtEnd()) {
const FullscreenRequest& request = iter.Get();
if (request.GetDocument()->ApplyFullscreen(request)) {
handled = true;
}
iter.DeleteAndNext();
}
return handled;
}
static void
ClearPendingFullscreenRequests(nsIDocument* aDoc)
{
PendingFullscreenRequestList::Iterator iter(
aDoc, PendingFullscreenRequestList::eInclusiveDescendants);
while (!iter.AtEnd()) {
iter.DeleteAndNext();
}
}
bool
nsDocument::ApplyFullscreen(const FullscreenRequest& aRequest)
{
Element* elem = aRequest.GetElement();
if (!FullscreenElementReadyCheck(elem, aRequest.mIsCallerChrome)) {
return false;
}
// Stash a reference to any existing fullscreen doc, we'll use this later
// to detect if the origin which is fullscreen has changed.
nsCOMPtr<nsIDocument> previousFullscreenDoc = GetFullscreenLeaf(this);
// Stores a list of documents which we must dispatch "fullscreenchange"
// too. We're required by the spec to dispatch the events in root-to-leaf
// order, but we traverse the doctree in a leaf-to-root order, so we save
// references to the documents we must dispatch to so that we get the order
// as specified.
AutoTArray<nsIDocument*, 8> changed;
// Remember the root document, so that if a full-screen document is hidden
// we can reset full-screen state in the remaining visible full-screen documents.
nsIDocument* fullScreenRootDoc = nsContentUtils::GetRootDocument(this);
// If a document is already in fullscreen, then unlock the mouse pointer
// before setting a new document to fullscreen
UnlockPointer();
// Set the full-screen element. This sets the full-screen style on the
// element, and the full-screen-ancestor styles on ancestors of the element
// in this document.
DebugOnly<bool> x = FullScreenStackPush(elem);
NS_ASSERTION(x, "Full-screen state of requesting doc should always change!");
// Set the iframe fullscreen flag.
if (elem->IsHTMLElement(nsGkAtoms::iframe)) {
static_cast<HTMLIFrameElement*>(elem)->SetFullscreenFlag(true);
}
changed.AppendElement(this);
// Propagate up the document hierarchy, setting the full-screen element as
// the element's container in ancestor documents. This also sets the
// appropriate css styles as well. Note we don't propagate down the
// document hierarchy, the full-screen element (or its container) is not
// visible there. Stop when we reach the root document.
nsIDocument* child = this;
while (true) {
child->SetFullscreenRoot(fullScreenRootDoc);
NS_ASSERTION(child->GetFullscreenRoot() == fullScreenRootDoc,
"Fullscreen root should be set!");
if (child == fullScreenRootDoc) {
break;
}
nsIDocument* parent = child->GetParentDocument();
Element* element = parent->FindContentForSubDocument(child)->AsElement();
if (static_cast<nsDocument*>(parent)->FullScreenStackPush(element)) {
changed.AppendElement(parent);
child = parent;
} else {
// We've reached either the root, or a point in the doctree where the
// new full-screen element container is the same as the previous
// full-screen element's container. No more changes need to be made
// to the full-screen stacks of documents further up the tree.
break;
}
}
FullscreenRoots::Add(this);
// If it is the first entry of the fullscreen, trigger an event so
// that the UI can response to this change, e.g. hide chrome, or
// notifying parent process to enter fullscreen. Note that chrome
// code may also want to listen to MozDOMFullscreen:NewOrigin event
// to pop up warning UI.
if (!previousFullscreenDoc) {
nsContentUtils::DispatchEventOnlyToChrome(
this, ToSupports(elem), NS_LITERAL_STRING("MozDOMFullscreen:Entered"),
/* Bubbles */ true, /* Cancelable */ false, /* DefaultAction */ nullptr);
}
// The origin which is fullscreen gets changed. Trigger an event so
// that the chrome knows to pop up a warning UI. Note that
// previousFullscreenDoc == nullptr upon first entry, so we always
// take this path on the first entry. Also note that, in a multi-
// process browser, the code in content process is responsible for
// sending message with the origin to its parent, and the parent
// shouldn't rely on this event itself.
if (aRequest.mShouldNotifyNewOrigin &&
!nsContentUtils::HaveEqualPrincipals(previousFullscreenDoc, this)) {
DispatchCustomEventWithFlush(
this, NS_LITERAL_STRING("MozDOMFullscreen:NewOrigin"),
/* Bubbles */ true, /* ChromeOnly */ true);
}
// Dispatch "fullscreenchange" events. Note this loop is in reverse
// order so that the events for the root document arrives before the leaf
// document, as required by the spec.
for (uint32_t i = 0; i < changed.Length(); ++i) {
DispatchFullScreenChange(changed[changed.Length() - i - 1]);
}
return true;
}
NS_IMETHODIMP
nsDocument::GetMozFullScreenElement(nsIDOMElement **aFullScreenElement)
{
Element* el = GetFullscreenElement();
nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(el);
retval.forget(aFullScreenElement);
return NS_OK;
}
Element*
nsDocument::GetFullscreenElement()
{
Element* element = FullScreenStackTop();
NS_ASSERTION(!element ||
element->State().HasState(NS_EVENT_STATE_FULL_SCREEN),
"Fullscreen element should have fullscreen styles applied");
return element;
}
NS_IMETHODIMP
nsDocument::GetMozFullScreen(bool *aFullScreen)
{
*aFullScreen = Fullscreen();
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetMozFullScreenEnabled(bool *aFullScreen)
{
NS_ENSURE_ARG_POINTER(aFullScreen);
*aFullScreen = FullscreenEnabled();
return NS_OK;
}
bool
nsDocument::FullscreenEnabled()
{
return !GetFullscreenError(this, nsContentUtils::IsCallerChrome());
}
uint16_t
nsDocument::CurrentOrientationAngle() const
{
return mCurrentOrientationAngle;
}
OrientationType
nsDocument::CurrentOrientationType() const
{
return mCurrentOrientationType;
}
void
nsDocument::SetCurrentOrientation(mozilla::dom::OrientationType aType,
uint16_t aAngle)
{
mCurrentOrientationType = aType;
mCurrentOrientationAngle = aAngle;
}
Promise*
nsDocument::GetOrientationPendingPromise() const
{
return mOrientationPendingPromise;
}
void
nsDocument::SetOrientationPendingPromise(Promise* aPromise)
{
mOrientationPendingPromise = aPromise;
}
static void
DispatchPointerLockChange(nsIDocument* aTarget)
{
if (!aTarget) {
return;
}
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(aTarget,
NS_LITERAL_STRING("pointerlockchange"),
true,
false);
asyncDispatcher->PostDOMEvent();
}
static void
DispatchPointerLockError(nsIDocument* aTarget, const char* aMessage)
{
if (!aTarget) {
return;
}
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(aTarget,
NS_LITERAL_STRING("pointerlockerror"),
true,
false);
asyncDispatcher->PostDOMEvent();
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"), aTarget,
nsContentUtils::eDOM_PROPERTIES,
aMessage);
}
class PointerLockRequest final : public Runnable
{
public:
PointerLockRequest(Element* aElement, bool aUserInputOrChromeCaller)
: mElement(do_GetWeakReference(aElement))
, mDocument(do_GetWeakReference(aElement->OwnerDoc()))
, mUserInputOrChromeCaller(aUserInputOrChromeCaller)
{}
NS_IMETHOD Run() final;
private:
nsWeakPtr mElement;
nsWeakPtr mDocument;
bool mUserInputOrChromeCaller;
};
static const char*
GetPointerLockError(Element* aElement, Element* aCurrentLock,
bool aNoFocusCheck = false)
{
// Check if pointer lock pref is enabled
if (!Preferences::GetBool("full-screen-api.pointer-lock.enabled")) {
return "PointerLockDeniedDisabled";
}
nsCOMPtr<nsIDocument> ownerDoc = aElement->OwnerDoc();
if (aCurrentLock && aCurrentLock->OwnerDoc() != ownerDoc) {
return "PointerLockDeniedInUse";
}
if (!aElement->IsInUncomposedDoc()) {
return "PointerLockDeniedNotInDocument";
}
if (ownerDoc->GetSandboxFlags() & SANDBOXED_POINTER_LOCK) {
return "PointerLockDeniedSandboxed";
}
// Check if the element is in a document with a docshell.
if (!ownerDoc->GetContainer()) {
return "PointerLockDeniedHidden";
}
nsCOMPtr<nsPIDOMWindowOuter> ownerWindow = ownerDoc->GetWindow();
if (!ownerWindow) {
return "PointerLockDeniedHidden";
}
nsCOMPtr<nsPIDOMWindowInner> ownerInnerWindow = ownerDoc->GetInnerWindow();
if (!ownerInnerWindow) {
return "PointerLockDeniedHidden";
}
if (ownerWindow->GetCurrentInnerWindow() != ownerInnerWindow) {
return "PointerLockDeniedHidden";
}
nsCOMPtr<nsPIDOMWindowOuter> top = ownerWindow->GetScriptableTop();
if (!top || !top->GetExtantDoc() || top->GetExtantDoc()->Hidden()) {
return "PointerLockDeniedHidden";
}
if (!aNoFocusCheck) {
mozilla::ErrorResult rv;
if (!top->GetExtantDoc()->HasFocus(rv)) {
return "PointerLockDeniedNotFocused";
}
}
return nullptr;
}
static void
ChangePointerLockedElement(Element* aElement, nsIDocument* aDocument,
Element* aPointerLockedElement)
{
// aDocument here is not really necessary, as it is the uncomposed
// document of both aElement and aPointerLockedElement as far as one
// is not nullptr, and they wouldn't both be nullptr in any case.
// But since the caller of this function should have known what the
// document is, we just don't try to figure out what it should be.
MOZ_ASSERT(aDocument);
MOZ_ASSERT(aElement != aPointerLockedElement);
if (aPointerLockedElement) {
MOZ_ASSERT(aPointerLockedElement->GetUncomposedDoc() == aDocument);
aPointerLockedElement->ClearPointerLock();
}
if (aElement) {
MOZ_ASSERT(aElement->GetUncomposedDoc() == aDocument);
aElement->SetPointerLock();
EventStateManager::sPointerLockedElement = do_GetWeakReference(aElement);
EventStateManager::sPointerLockedDoc = do_GetWeakReference(aDocument);
NS_ASSERTION(EventStateManager::sPointerLockedElement &&
EventStateManager::sPointerLockedDoc,
"aElement and this should support weak references!");
} else {
EventStateManager::sPointerLockedElement = nullptr;
EventStateManager::sPointerLockedDoc = nullptr;
}
// Retarget all events to aElement via capture or
// stop retargeting if aElement is nullptr.
nsIPresShell::SetCapturingContent(aElement, CAPTURE_POINTERLOCK);
DispatchPointerLockChange(aDocument);
}
NS_IMETHODIMP
PointerLockRequest::Run()
{
nsCOMPtr<Element> e = do_QueryReferent(mElement);
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
nsDocument* d = static_cast<nsDocument*>(doc.get());
const char* error = nullptr;
if (!e || !d || !e->GetUncomposedDoc()) {
error = "PointerLockDeniedNotInDocument";
} else if (e->GetUncomposedDoc() != d) {
error = "PointerLockDeniedMovedDocument";
}
if (!error) {
nsCOMPtr<Element> pointerLockedElement =
do_QueryReferent(EventStateManager::sPointerLockedElement);
if (e == pointerLockedElement) {
DispatchPointerLockChange(d);
return NS_OK;
}
// Note, we must bypass focus change, so pass true as the last parameter!
error = GetPointerLockError(e, pointerLockedElement, true);
// Another element in the same document is requesting pointer lock,
// just grant it without user input check.
if (!error && pointerLockedElement) {
ChangePointerLockedElement(e, d, pointerLockedElement);
return NS_OK;
}
}
// If it is neither user input initiated, nor requested in fullscreen,
// it should be rejected.
if (!error && !mUserInputOrChromeCaller && !doc->GetFullscreenElement()) {
error = "PointerLockDeniedNotInputDriven";
}
if (!error && !d->SetPointerLock(e, NS_STYLE_CURSOR_NONE)) {
error = "PointerLockDeniedFailedToLock";
}
if (error) {
DispatchPointerLockError(d, error);
return NS_OK;
}
ChangePointerLockedElement(e, d, nullptr);
nsContentUtils::DispatchEventOnlyToChrome(
doc, ToSupports(e), NS_LITERAL_STRING("MozDOMPointerLock:Entered"),
/* Bubbles */ true, /* Cancelable */ false, /* DefaultAction */ nullptr);
return NS_OK;
}
void
nsDocument::RequestPointerLock(Element* aElement)
{
NS_ASSERTION(aElement,
"Must pass non-null element to nsDocument::RequestPointerLock");
nsCOMPtr<Element> pointerLockedElement =
do_QueryReferent(EventStateManager::sPointerLockedElement);
if (aElement == pointerLockedElement) {
DispatchPointerLockChange(this);
return;
}
if (const char* msg = GetPointerLockError(aElement, pointerLockedElement)) {
DispatchPointerLockError(this, msg);
return;
}
bool userInputOrChromeCaller = EventStateManager::IsHandlingUserInput() ||
nsContentUtils::IsCallerChrome();
NS_DispatchToMainThread(new PointerLockRequest(aElement,
userInputOrChromeCaller));
}
bool
nsDocument::SetPointerLock(Element* aElement, int aCursorStyle)
{
MOZ_ASSERT(!aElement || aElement->OwnerDoc() == this,
"We should be either unlocking pointer (aElement is nullptr), "
"or locking pointer to an element in this document");
#ifdef DEBUG
if (!aElement) {
nsCOMPtr<nsIDocument> pointerLockedDoc =
do_QueryReferent(EventStateManager::sPointerLockedDoc);
MOZ_ASSERT(pointerLockedDoc == this);
}
#endif
nsIPresShell* shell = GetShell();
if (!shell) {
NS_WARNING("SetPointerLock(): No PresShell");
return false;
}
nsPresContext* presContext = shell->GetPresContext();
if (!presContext) {
NS_WARNING("SetPointerLock(): Unable to get PresContext");
return false;
}
nsCOMPtr<nsIWidget> widget;
nsIFrame* rootFrame = shell->GetRootFrame();
if (!NS_WARN_IF(!rootFrame)) {
widget = rootFrame->GetNearestWidget();
NS_WARNING_ASSERTION(
widget,
"SetPointerLock(): Unable to find widget in "
"shell->GetRootFrame()->GetNearestWidget();");
if (aElement && !widget) {
return false;
}
}
// Hide the cursor and set pointer lock for future mouse events
RefPtr<EventStateManager> esm = presContext->EventStateManager();
esm->SetCursor(aCursorStyle, nullptr, false,
0.0f, 0.0f, widget, true);
esm->SetPointerLock(widget, aElement);
return true;
}
void
nsDocument::UnlockPointer(nsIDocument* aDoc)
{
if (!EventStateManager::sIsPointerLocked) {
return;
}
nsCOMPtr<nsIDocument> pointerLockedDoc =
do_QueryReferent(EventStateManager::sPointerLockedDoc);
if (!pointerLockedDoc || (aDoc && aDoc != pointerLockedDoc)) {
return;
}
nsDocument* doc = static_cast<nsDocument*>(pointerLockedDoc.get());
if (!doc->SetPointerLock(nullptr, NS_STYLE_CURSOR_AUTO)) {
return;
}
nsCOMPtr<Element> pointerLockedElement =
do_QueryReferent(EventStateManager::sPointerLockedElement);
ChangePointerLockedElement(nullptr, doc, pointerLockedElement);
nsContentUtils::DispatchEventOnlyToChrome(
doc, ToSupports(pointerLockedElement),
NS_LITERAL_STRING("MozDOMPointerLock:Exited"),
/* Bubbles */ true, /* Cancelable */ false, /* DefaultAction */ nullptr);
}
void
nsIDocument::UnlockPointer(nsIDocument* aDoc)
{
nsDocument::UnlockPointer(aDoc);
}
NS_IMETHODIMP
nsDocument::MozExitPointerLock()
{
nsIDocument::ExitPointerLock();
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetMozPointerLockElement(nsIDOMElement** aPointerLockedElement)
{
Element* el = nsIDocument::GetPointerLockElement();
nsCOMPtr<nsIDOMElement> retval = do_QueryInterface(el);
retval.forget(aPointerLockedElement);
return NS_OK;
}
Element*
nsIDocument::GetPointerLockElement()
{
nsCOMPtr<Element> pointerLockedElement =
do_QueryReferent(EventStateManager::sPointerLockedElement);
if (!pointerLockedElement) {
return nullptr;
}
// Make sure pointer locked element is in the same document.
nsCOMPtr<nsIDocument> pointerLockedDoc =
do_QueryReferent(EventStateManager::sPointerLockedDoc);
if (pointerLockedDoc != this) {
return nullptr;
}
return pointerLockedElement;
}
nsresult
nsDocument::Observe(nsISupports *aSubject,
const char *aTopic,
const char16_t *aData)
{
if (strcmp("app-theme-changed", aTopic) == 0) {
if (!nsContentUtils::IsSystemPrincipal(NodePrincipal()) &&
!IsUnstyledDocument()) {
// We don't want to style the chrome window, only app ones.
OnAppThemeChanged();
}
} else if (strcmp("service-worker-get-client", aTopic) == 0) {
// No need to generate the ID if it doesn't exist here. The ID being
// requested must already be generated in order to passed in as
// aSubject.
nsString clientId = GetId();
if (!clientId.IsEmpty() && clientId.Equals(aData)) {
nsCOMPtr<nsISupportsInterfacePointer> ifptr = do_QueryInterface(aSubject);
if (ifptr) {
#ifdef DEBUG
nsCOMPtr<nsISupports> value;
MOZ_ALWAYS_SUCCEEDS(ifptr->GetData(getter_AddRefs(value)));
MOZ_ASSERT(!value);
#endif
ifptr->SetData(static_cast<nsIDocument*>(this));
ifptr->SetDataIID(&NS_GET_IID(nsIDocument));
}
}
}
return NS_OK;
}
void
nsDocument::OnAppThemeChanged()
{
// Bail out if there is no theme support set up properly.
auto themeOrigin = Preferences::GetString("b2g.theme.origin");
if (!themeOrigin || !Preferences::GetBool("dom.mozApps.themable")) {
return;
}
for (int32_t i = 0; i < GetNumberOfStyleSheets(); i++) {
RefPtr<StyleSheet> sheet = GetStyleSheetAt(i);
if (!sheet) {
continue;
}
nsINode* owningNode = sheet->GetOwnerNode();
if (!owningNode) {
continue;
}
// Get a DOM stylesheet link to check the href against the theme origin.
nsIURI* sheetURI = sheet->GetOriginalURI();
if (!sheetURI) {
continue;
}
nsAutoString sheetOrigin;
nsContentUtils::GetUTFOrigin(sheetURI, sheetOrigin);
if (!sheetOrigin.Equals(themeOrigin)) {
continue;
}
// Finally getting a Stylesheet link.
nsCOMPtr<nsIStyleSheetLinkingElement> link = do_QueryInterface(owningNode);
if (!link) {
continue;
}
bool willNotify;
bool isAlternate;
link->UpdateStyleSheet(nullptr, &willNotify, &isAlternate, true);
}
}
void
nsDocument::UpdateVisibilityState()
{
dom::VisibilityState oldState = mVisibilityState;
mVisibilityState = GetVisibilityState();
if (oldState != mVisibilityState) {
nsContentUtils::DispatchTrustedEvent(this, static_cast<nsIDocument*>(this),
NS_LITERAL_STRING("visibilitychange"),
/* bubbles = */ true,
/* cancelable = */ false);
EnumerateActivityObservers(NotifyActivityChanged, nullptr);
}
if (mVisibilityState == dom::VisibilityState::Visible) {
MaybeActiveMediaComponents();
}
}
VisibilityState
nsDocument::GetVisibilityState() const
{
// We have to check a few pieces of information here:
// 1) Are we in bfcache (!IsVisible())? If so, nothing else matters.
// 2) Do we have an outer window? If not, we're hidden. Note that we don't
// want to use GetWindow here because it does weird groveling for windows
// in some cases.
// 3) Is our outer window background? If so, we're hidden.
// Otherwise, we're visible.
if (!IsVisible() || !mWindow || !mWindow->GetOuterWindow() ||
mWindow->GetOuterWindow()->IsBackground()) {
// Check if the document is in prerender state.
nsCOMPtr<nsIDocShell> docshell = GetDocShell();
if (docshell && docshell->GetIsPrerendered()) {
return dom::VisibilityState::Prerender;
}
return dom::VisibilityState::Hidden;
}
return dom::VisibilityState::Visible;
}
/* virtual */ void
nsDocument::PostVisibilityUpdateEvent()
{
nsCOMPtr<nsIRunnable> event =
NewRunnableMethod(this, &nsDocument::UpdateVisibilityState);
NS_DispatchToMainThread(event);
}
void
nsDocument::MaybeActiveMediaComponents()
{
if (mEverInForeground) {
return;
}
if (!mWindow) {
return;
}
mEverInForeground = true;
if (GetWindow()->GetMediaSuspend() == nsISuspendedTypes::SUSPENDED_BLOCK) {
GetWindow()->SetMediaSuspend(nsISuspendedTypes::NONE_SUSPENDED);
}
}
NS_IMETHODIMP
nsDocument::GetHidden(bool* aHidden)
{
*aHidden = Hidden();
return NS_OK;
}
NS_IMETHODIMP
nsDocument::GetVisibilityState(nsAString& aState)
{
const EnumEntry& entry =
VisibilityStateValues::strings[static_cast<int>(mVisibilityState)];
aState.AssignASCII(entry.value, entry.length);
return NS_OK;
}
/* virtual */ void
nsIDocument::DocAddSizeOfExcludingThis(nsWindowSizes* aWindowSizes) const
{
aWindowSizes->mDOMOtherSize +=
nsINode::SizeOfExcludingThis(aWindowSizes->mMallocSizeOf);
if (mPresShell) {
mPresShell->AddSizeOfIncludingThis(aWindowSizes->mMallocSizeOf,
&aWindowSizes->mArenaStats,
&aWindowSizes->mLayoutPresShellSize,
&aWindowSizes->mLayoutStyleSetsSize,
&aWindowSizes->mLayoutTextRunsSize,
&aWindowSizes->mLayoutPresContextSize);
}
aWindowSizes->mPropertyTablesSize +=
mPropertyTable.SizeOfExcludingThis(aWindowSizes->mMallocSizeOf);
for (uint32_t i = 0, count = mExtraPropertyTables.Length();
i < count; ++i) {
aWindowSizes->mPropertyTablesSize +=
mExtraPropertyTables[i]->SizeOfIncludingThis(aWindowSizes->mMallocSizeOf);
}
if (EventListenerManager* elm = GetExistingListenerManager()) {
aWindowSizes->mDOMEventListenersCount += elm->ListenerCount();
}
// Measurement of the following members may be added later if DMD finds it
// is worthwhile:
// - many!
}
void
nsIDocument::DocAddSizeOfIncludingThis(nsWindowSizes* aWindowSizes) const
{
aWindowSizes->mDOMOtherSize += aWindowSizes->mMallocSizeOf(this);
DocAddSizeOfExcludingThis(aWindowSizes);
}
static size_t
SizeOfOwnedSheetArrayExcludingThis(const nsTArray<RefPtr<StyleSheet>>& aSheets,
MallocSizeOf aMallocSizeOf)
{
size_t n = 0;
n += aSheets.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (StyleSheet* sheet : aSheets) {
if (!sheet->GetOwningDocument()) {
// Avoid over-reporting shared sheets.
continue;
}
n += sheet->SizeOfIncludingThis(aMallocSizeOf);
}
return n;
}
size_t
nsDocument::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
// This SizeOfExcludingThis() overrides the one from nsINode. But
// nsDocuments can only appear at the top of the DOM tree, and we use the
// specialized DocAddSizeOfExcludingThis() in that case. So this should never
// be called.
MOZ_CRASH();
}
void
nsDocument::DocAddSizeOfExcludingThis(nsWindowSizes* aWindowSizes) const
{
nsIDocument::DocAddSizeOfExcludingThis(aWindowSizes);
for (nsIContent* node = nsINode::GetFirstChild();
node;
node = node->GetNextNode(this))
{
size_t nodeSize = node->SizeOfIncludingThis(aWindowSizes->mMallocSizeOf);
size_t* p;
switch (node->NodeType()) {
case nsIDOMNode::ELEMENT_NODE:
p = &aWindowSizes->mDOMElementNodesSize;
break;
case nsIDOMNode::TEXT_NODE:
p = &aWindowSizes->mDOMTextNodesSize;
break;
case nsIDOMNode::CDATA_SECTION_NODE:
p = &aWindowSizes->mDOMCDATANodesSize;
break;
case nsIDOMNode::COMMENT_NODE:
p = &aWindowSizes->mDOMCommentNodesSize;
break;
default:
p = &aWindowSizes->mDOMOtherSize;
break;
}
*p += nodeSize;
if (EventListenerManager* elm = node->GetExistingListenerManager()) {
aWindowSizes->mDOMEventListenersCount += elm->ListenerCount();
}
}
aWindowSizes->mStyleSheetsSize +=
SizeOfOwnedSheetArrayExcludingThis(mStyleSheets,
aWindowSizes->mMallocSizeOf);
// Note that we do not own the sheets pointed to by mOnDemandBuiltInUASheets
// (the nsLayoutStyleSheetCache singleton does).
aWindowSizes->mStyleSheetsSize +=
mOnDemandBuiltInUASheets.ShallowSizeOfExcludingThis(
aWindowSizes->mMallocSizeOf);
for (auto& sheetArray : mAdditionalSheets) {
aWindowSizes->mStyleSheetsSize +=
SizeOfOwnedSheetArrayExcludingThis(sheetArray,
aWindowSizes->mMallocSizeOf);
}
// Lumping in the loader with the style-sheets size is not ideal,
// but most of the things in there are in fact stylesheets, so it
// doesn't seem worthwhile to separate it out.
aWindowSizes->mStyleSheetsSize +=
CSSLoader()->SizeOfIncludingThis(aWindowSizes->mMallocSizeOf);
aWindowSizes->mDOMOtherSize +=
mAttrStyleSheet ?
mAttrStyleSheet->DOMSizeOfIncludingThis(aWindowSizes->mMallocSizeOf) :
0;
aWindowSizes->mDOMOtherSize +=
mSVGAttrAnimationRuleProcessor ?
mSVGAttrAnimationRuleProcessor->DOMSizeOfIncludingThis(
aWindowSizes->mMallocSizeOf) :
0;
aWindowSizes->mDOMOtherSize +=
mStyledLinks.ShallowSizeOfExcludingThis(aWindowSizes->mMallocSizeOf);
aWindowSizes->mDOMOtherSize +=
mIdentifierMap.SizeOfExcludingThis(aWindowSizes->mMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it
// is worthwhile:
// - many!
}
NS_IMETHODIMP
nsDocument::QuerySelector(const nsAString& aSelector, nsIDOMElement **aReturn)
{
return nsINode::QuerySelector(aSelector, aReturn);
}
NS_IMETHODIMP
nsDocument::QuerySelectorAll(const nsAString& aSelector, nsIDOMNodeList **aReturn)
{
return nsINode::QuerySelectorAll(aSelector, aReturn);
}
already_AddRefed<nsIDocument>
nsIDocument::Constructor(const GlobalObject& aGlobal,
ErrorResult& rv)
{
nsCOMPtr<nsIScriptGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
if (!global) {
rv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsCOMPtr<nsIScriptObjectPrincipal> prin = do_QueryInterface(aGlobal.GetAsSupports());
if (!prin) {
rv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank");
if (!uri) {
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return nullptr;
}
nsCOMPtr<nsIDOMDocument> document;
nsresult res =
NS_NewDOMDocument(getter_AddRefs(document),
NullString(),
EmptyString(),
nullptr,
uri,
uri,
prin->GetPrincipal(),
true,
global,
DocumentFlavorPlain);
if (NS_FAILED(res)) {
rv.Throw(res);
return nullptr;
}
nsCOMPtr<nsIDocument> doc = do_QueryInterface(document);
doc->SetReadyStateInternal(nsIDocument::READYSTATE_COMPLETE);
return doc.forget();
}
XPathExpression*
nsIDocument::CreateExpression(const nsAString& aExpression,
XPathNSResolver* aResolver,
ErrorResult& rv)
{
return XPathEvaluator()->CreateExpression(aExpression, aResolver, rv);
}
nsINode*
nsIDocument::CreateNSResolver(nsINode& aNodeResolver)
{
return XPathEvaluator()->CreateNSResolver(aNodeResolver);
}
already_AddRefed<XPathResult>
nsIDocument::Evaluate(JSContext* aCx, const nsAString& aExpression,
nsINode& aContextNode, XPathNSResolver* aResolver,
uint16_t aType, JS::Handle<JSObject*> aResult,
ErrorResult& rv)
{
return XPathEvaluator()->Evaluate(aCx, aExpression, aContextNode, aResolver,
aType, aResult, rv);
}
NS_IMETHODIMP
nsDocument::Evaluate(const nsAString& aExpression, nsIDOMNode* aContextNode,
nsIDOMNode* aResolver, uint16_t aType,
nsISupports* aInResult, nsISupports** aResult)
{
return XPathEvaluator()->Evaluate(aExpression, aContextNode, aResolver, aType,
aInResult, aResult);
}
nsIDocument*
nsIDocument::GetTopLevelContentDocument()
{
nsDocument* parent;
if (!mLoadedAsData) {
parent = static_cast<nsDocument*>(this);
} else {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetScopeObject());
if (!window) {
return nullptr;
}
parent = static_cast<nsDocument*>(window->GetExtantDoc());
if (!parent) {
return nullptr;
}
}
do {
if (parent->IsTopLevelContentDocument()) {
break;
}
// If we ever have a non-content parent before we hit a toplevel content
// parent, then we're never going to find one. Just bail.
if (!parent->IsContentDocument()) {
return nullptr;
}
nsIDocument* candidate = parent->GetParentDocument();
parent = static_cast<nsDocument*>(candidate);
} while (parent);
return parent;
}
void
nsIDocument::PropagateUseCounters(nsIDocument* aParentDocument)
{
MOZ_ASSERT(this != aParentDocument);
// What really matters here is that our use counters get propagated as
// high up in the content document hierarchy as possible. So,
// starting with aParentDocument, we need to find the toplevel content
// document, and propagate our use counters into its
// mChildDocumentUseCounters.
nsIDocument* contentParent = aParentDocument->GetTopLevelContentDocument();
if (!contentParent) {
return;
}
contentParent->mChildDocumentUseCounters |= mUseCounters;
contentParent->mChildDocumentUseCounters |= mChildDocumentUseCounters;
}
void
nsIDocument::SetPageUseCounter(UseCounter aUseCounter)
{
// We want to set the use counter on the "page" that owns us; the definition
// of "page" depends on what kind of document we are. See the comments below
// for details. In any event, checking all the conditions below is
// reasonably expensive, so we cache whether we've notified our owning page.
if (mNotifiedPageForUseCounter[aUseCounter]) {
return;
}
mNotifiedPageForUseCounter[aUseCounter] = true;
if (mDisplayDocument) {
// If we are a resource document, we won't have a docshell and so we won't
// record any page use counters on this document. Instead, we should
// forward it up to the document that loaded us.
MOZ_ASSERT(!mDocumentContainer);
mDisplayDocument->SetChildDocumentUseCounter(aUseCounter);
return;
}
if (IsBeingUsedAsImage()) {
// If this is an SVG image document, we also won't have a docshell.
MOZ_ASSERT(!mDocumentContainer);
return;
}
// We only care about use counters in content. If we're already a toplevel
// content document, then we should have already set the use counter on
// ourselves, and we are done.
nsIDocument* contentParent = GetTopLevelContentDocument();
if (!contentParent) {
return;
}
if (this == contentParent) {
MOZ_ASSERT(GetUseCounter(aUseCounter));
return;
}
contentParent->SetChildDocumentUseCounter(aUseCounter);
}
bool
nsIDocument::HasScriptsBlockedBySandbox()
{
return mSandboxFlags & SANDBOXED_SCRIPTS;
}
static bool
MightBeAboutOrChromeScheme(nsIURI* aURI)
{
MOZ_ASSERT(aURI);
bool isAbout = true;
bool isChrome = true;
aURI->SchemeIs("about", &isAbout);
aURI->SchemeIs("chrome", &isChrome);
return isAbout || isChrome;
}
void
nsDocument::ReportUseCounters()
{
static const bool sDebugUseCounters = false;
if (mReportedUseCounters) {
return;
}
mReportedUseCounters = true;
if (Telemetry::HistogramUseCounterCount > 0 &&
(IsContentDocument() || IsResourceDoc())) {
nsCOMPtr<nsIURI> uri;
NodePrincipal()->GetURI(getter_AddRefs(uri));
if (!uri || MightBeAboutOrChromeScheme(uri)) {
return;
}
if (sDebugUseCounters) {
nsCString spec = uri->GetSpecOrDefault();
// URIs can be rather long for data documents, so truncate them to
// some reasonable length.
spec.Truncate(std::min(128U, spec.Length()));
printf("-- Use counters for %s --\n", spec.get());
}
// We keep separate counts for individual documents and top-level
// pages to more accurately track how many web pages might break if
// certain features were removed. Consider the case of a single
// HTML document with several SVG images and/or iframes with
// sub-documents of their own. If we maintained a single set of use
// counters and all the sub-documents use a particular feature, then
// telemetry would indicate that we would be breaking N documents if
// that feature were removed. Whereas with a document/top-level
// page split, we can see that N documents would be affected, but
// only a single web page would be affected.
// The difference between the values of these two histograms and the
// related use counters below tell us how many pages did *not* use
// the feature in question. For instance, if we see that a given
// session has destroyed 30 content documents, but a particular use
// counter shows only a count of 5, we can infer that the use
// counter was *not* used in 25 of those 30 documents.
//
// We do things this way, rather than accumulating a boolean flag
// for each use counter, to avoid sending histograms for features
// that don't get widely used. Doing things in this fashion means
// smaller telemetry payloads and faster processing on the server
// side.
Telemetry::Accumulate(Telemetry::CONTENT_DOCUMENTS_DESTROYED, 1);
if (IsTopLevelContentDocument()) {
Telemetry::Accumulate(Telemetry::TOP_LEVEL_CONTENT_DOCUMENTS_DESTROYED, 1);
}
for (int32_t c = 0;
c < eUseCounter_Count; ++c) {
UseCounter uc = static_cast<UseCounter>(c);
Telemetry::ID id =
static_cast<Telemetry::ID>(Telemetry::HistogramFirstUseCounter + uc * 2);
bool value = GetUseCounter(uc);
if (value) {
if (sDebugUseCounters) {
const char* name = Telemetry::GetHistogramName(id);
if (name) {
printf(" %s", name);
} else {
printf(" #%d", id);
}
printf(": %d\n", value);
}
Telemetry::Accumulate(id, 1);
}
if (IsTopLevelContentDocument()) {
id = static_cast<Telemetry::ID>(Telemetry::HistogramFirstUseCounter +
uc * 2 + 1);
value = GetUseCounter(uc) || GetChildDocumentUseCounter(uc);
if (value) {
if (sDebugUseCounters) {
const char* name = Telemetry::GetHistogramName(id);
if (name) {
printf(" %s", name);
} else {
printf(" #%d", id);
}
printf(": %d\n", value);
}
Telemetry::Accumulate(id, 1);
}
}
}
}
}
XPathEvaluator*
nsIDocument::XPathEvaluator()
{
if (!mXPathEvaluator) {
mXPathEvaluator = new dom::XPathEvaluator(this);
}
return mXPathEvaluator;
}
already_AddRefed<nsIDocumentEncoder>
nsIDocument::GetCachedEncoder()
{
return mCachedEncoder.forget();
}
void
nsIDocument::SetCachedEncoder(already_AddRefed<nsIDocumentEncoder> aEncoder)
{
mCachedEncoder = aEncoder;
}
void
nsIDocument::SetContentTypeInternal(const nsACString& aType)
{
if (!IsHTMLOrXHTML() && mDefaultElementType == kNameSpaceID_None &&
aType.EqualsLiteral("application/xhtml+xml")) {
mDefaultElementType = kNameSpaceID_XHTML;
}
mCachedEncoder = nullptr;
mContentType = aType;
}
nsILoadContext*
nsIDocument::GetLoadContext() const
{
return mDocumentContainer;
}
nsIDocShell*
nsIDocument::GetDocShell() const
{
return mDocumentContainer;
}
void
nsIDocument::SetStateObject(nsIStructuredCloneContainer *scContainer)
{
mStateObjectContainer = scContainer;
mStateObjectCached = nullptr;
}
already_AddRefed<Element>
nsIDocument::CreateHTMLElement(nsIAtom* aTag)
{
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
nodeInfo = mNodeInfoManager->GetNodeInfo(aTag, nullptr, kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
MOZ_ASSERT(nodeInfo, "GetNodeInfo should never fail");
nsCOMPtr<Element> element;
DebugOnly<nsresult> rv = NS_NewHTMLElement(getter_AddRefs(element),
nodeInfo.forget(),
mozilla::dom::NOT_FROM_PARSER);
MOZ_ASSERT(NS_SUCCEEDED(rv), "NS_NewHTMLElement should never fail");
return element.forget();
}
/* static */
nsresult
nsIDocument::GenerateDocumentId(nsAString& aId)
{
nsID id;
nsresult rv = nsContentUtils::GenerateUUIDInPlace(id);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Build a string in {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} format
char buffer[NSID_LENGTH];
id.ToProvidedString(buffer);
NS_ConvertASCIItoUTF16 uuid(buffer);
// Remove {} and the null terminator
aId.Assign(Substring(uuid, 1, NSID_LENGTH - 3));
return NS_OK;
}
nsresult
nsIDocument::GetOrCreateId(nsAString& aId)
{
if (mId.IsEmpty()) {
nsresult rv = GenerateDocumentId(mId);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
aId = mId;
return NS_OK;
}
void
nsIDocument::SetId(const nsAString& aId)
{
// The ID should only be set one time, but we may get the same value
// more than once if the document is controlled coming out of bfcache.
MOZ_ASSERT_IF(mId != aId, mId.IsEmpty());
mId = aId;
}
bool
MarkDocumentTreeToBeInSyncOperation(nsIDocument* aDoc, void* aData)
{
nsCOMArray<nsIDocument>* documents =
static_cast<nsCOMArray<nsIDocument>*>(aData);
if (aDoc) {
aDoc->SetIsInSyncOperation(true);
documents->AppendObject(aDoc);
aDoc->EnumerateSubDocuments(MarkDocumentTreeToBeInSyncOperation, aData);
}
return true;
}
nsAutoSyncOperation::nsAutoSyncOperation(nsIDocument* aDoc)
{
mMicroTaskLevel = nsContentUtils::MicroTaskLevel();
nsContentUtils::SetMicroTaskLevel(0);
if (aDoc) {
if (nsPIDOMWindowOuter* win = aDoc->GetWindow()) {
if (nsCOMPtr<nsPIDOMWindowOuter> top = win->GetTop()) {
nsCOMPtr<nsIDocument> doc = top->GetExtantDoc();
MarkDocumentTreeToBeInSyncOperation(doc, &mDocuments);
}
}
}
}
nsAutoSyncOperation::~nsAutoSyncOperation()
{
for (int32_t i = 0; i < mDocuments.Count(); ++i) {
mDocuments[i]->SetIsInSyncOperation(false);
}
nsContentUtils::SetMicroTaskLevel(mMicroTaskLevel);
}
gfxUserFontSet*
nsIDocument::GetUserFontSet()
{
// We want to initialize the user font set lazily the first time the
// user asks for it, rather than building it too early and forcing
// rule cascade creation. Thus we try to enforce the invariant that
// we *never* build the user font set until the first call to
// GetUserFontSet. However, once it's been requested, we can't wait
// for somebody to call GetUserFontSet in order to rebuild it (see
// comments below in RebuildUserFontSet for why).
#ifdef DEBUG
bool userFontSetGottenBefore = mGetUserFontSetCalled;
#endif
// Set mGetUserFontSetCalled up front, so that FlushUserFontSet will actually
// flush.
mGetUserFontSetCalled = true;
if (mFontFaceSetDirty) {
// If this assertion fails, and there have actually been changes to
// @font-face rules, then we will call StyleChangeReflow in
// FlushUserFontSet. If we're in the middle of reflow,
// that's a bad thing to do, and the caller was responsible for
// flushing first. If we're not (e.g., in frame construction), it's
// ok.
NS_ASSERTION(!userFontSetGottenBefore ||
!GetShell() ||
!GetShell()->IsReflowLocked(),
"FlushUserFontSet should have been called first");
FlushUserFontSet();
}
if (!mFontFaceSet) {
return nullptr;
}
return mFontFaceSet->GetUserFontSet();
}
void
nsIDocument::FlushUserFontSet()
{
if (!mGetUserFontSetCalled) {
return; // No one cares about this font set yet, but we want to be careful
// to not unset our mFontFaceSetDirty bit, so when someone really
// does we'll create it.
}
if (mFontFaceSetDirty) {
if (gfxPlatform::GetPlatform()->DownloadableFontsEnabled()) {
nsTArray<nsFontFaceRuleContainer> rules;
nsIPresShell* shell = GetShell();
if (shell) {
// XXXheycam ServoStyleSets don't support exposing @font-face rules yet.
if (shell->StyleSet()->IsGecko()) {
if (!shell->StyleSet()->AsGecko()->AppendFontFaceRules(rules)) {
return;
}
} else {
NS_WARNING("stylo: ServoStyleSets cannot handle @font-face rules yet. "
"See bug 1290237.");
}
}
bool changed = false;
if (!mFontFaceSet && !rules.IsEmpty()) {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetScopeObject());
mFontFaceSet = new FontFaceSet(window, this);
}
if (mFontFaceSet) {
changed = mFontFaceSet->UpdateRules(rules);
}
// We need to enqueue a style change reflow (for later) to
// reflect that we're modifying @font-face rules. (However,
// without a reflow, nothing will happen to start any downloads
// that are needed.)
if (changed && shell) {
nsPresContext* presContext = shell->GetPresContext();
if (presContext) {
presContext->UserFontSetUpdated();
}
}
}
mFontFaceSetDirty = false;
}
}
void
nsIDocument::RebuildUserFontSet()
{
if (!mGetUserFontSetCalled) {
// We want to lazily build the user font set the first time it's
// requested (so we don't force creation of rule cascades too
// early), so don't do anything now.
return;
}
mFontFaceSetDirty = true;
SetNeedStyleFlush();
// Somebody has already asked for the user font set, so we need to
// post an event to rebuild it. Setting the user font set to be dirty
// and lazily rebuilding it isn't sufficient, since it is only the act
// of rebuilding it that will trigger the style change reflow that
// calls GetUserFontSet. (This reflow causes rebuilding of text runs,
// which starts font loads, whose completion causes another style
// change reflow).
if (!mPostedFlushUserFontSet) {
nsCOMPtr<nsIRunnable> ev =
NewRunnableMethod(this, &nsIDocument::HandleRebuildUserFontSet);
if (NS_SUCCEEDED(NS_DispatchToCurrentThread(ev))) {
mPostedFlushUserFontSet = true;
}
}
}
FontFaceSet*
nsIDocument::Fonts()
{
if (!mFontFaceSet) {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetScopeObject());
mFontFaceSet = new FontFaceSet(window, this);
GetUserFontSet(); // this will cause the user font set to be created/updated
}
return mFontFaceSet;
}
void
nsIDocument::ReportHasScrollLinkedEffect()
{
if (mHasScrollLinkedEffect) {
// We already did this once for this document, don't do it again.
return;
}
mHasScrollLinkedEffect = true;
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("Async Pan/Zoom"),
this, nsContentUtils::eLAYOUT_PROPERTIES,
"ScrollLinkedEffectFound2");
}
void
nsIDocument::UpdateStyleBackendType()
{
MOZ_ASSERT(mStyleBackendType == StyleBackendType(0),
"no need to call UpdateStyleBackendType now");
// Assume Gecko by default.
mStyleBackendType = StyleBackendType::Gecko;
#ifdef MOZ_STYLO
// XXX For now we use a Servo-backed style set only for (X)HTML documents
// in content docshells. This should let us avoid implementing XUL-specific
// CSS features. And apart from not supporting SVG properties in Servo
// yet, the root SVG element likes to create a style sheet for an SVG
// document before we have a pres shell (i.e. before we make the decision
// here about whether to use a Gecko- or Servo-backed style system), so
// we avoid Servo-backed style sets for SVG documents.
if (!mDocumentContainer) {
NS_WARNING("stylo: No docshell yet, assuming Gecko style system");
} else if (nsLayoutUtils::SupportsServoStyleBackend(this)) {
mStyleBackendType = StyleBackendType::Servo;
}
#endif
}
const nsString*
nsDocument::CheckCustomElementName(const ElementCreationOptions& aOptions,
const nsAString& aLocalName,
uint32_t aNamespaceID,
ErrorResult& rv)
{
// only check aOptions if 'is' is passed and the webcomponents preference
// is enabled
if (!aOptions.mIs.WasPassed() ||
!Preferences::GetBool("dom.webcomponents.enabled")) {
return nullptr;
}
const nsString* is = &aOptions.mIs.Value();
// Throw NotFoundError if 'is' is not-null and definition is null
if (!nsContentUtils::LookupCustomElementDefinition(this, aLocalName,
aNamespaceID, is)) {
rv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
}
return is;
}
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