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83b78343dc
gecko/content/base/src/FragmentOrElement.cpp
Catalin Iacob 83b78343dc Bug 798914 (part 5) - Use newly introduced mozilla::MallocSizeOf instead of nsMallocSizeOfFun. r=njn. 
--HG--
extra : rebase_source : fc472490dd978d165f02f77ed37f07aed6e5bb61
2013-06-23 14:03:39 +02:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=79: */
/* 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 element classes; this provides an implementation
* of DOM Core's nsIDOMElement, implements nsIContent, provides
* utility methods for subclasses, and so forth.
*/
#include "mozilla/MemoryReporting.h"
#include "mozilla/Util.h"
#include "mozilla/Likely.h"
#include "mozilla/dom/FragmentOrElement.h"
#include "mozilla/dom/Attr.h"
#include "nsDOMAttributeMap.h"
#include "nsIAtom.h"
#include "nsINodeInfo.h"
#include "nsIDocumentInlines.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIContentIterator.h"
#include "nsEventListenerManager.h"
#include "nsFocusManager.h"
#include "nsILinkHandler.h"
#include "nsIScriptGlobalObject.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsIFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsStyleConsts.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsEventStateManager.h"
#include "nsIDOMEvent.h"
#include "nsDOMCID.h"
#include "nsIServiceManager.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsDOMCSSAttrDeclaration.h"
#include "nsINameSpaceManager.h"
#include "nsContentList.h"
#include "nsDOMTokenList.h"
#include "nsXBLPrototypeBinding.h"
#include "nsError.h"
#include "nsDOMString.h"
#include "nsIScriptSecurityManager.h"
#include "nsIDOMMutationEvent.h"
#include "nsMutationEvent.h"
#include "nsNodeUtils.h"
#include "nsDocument.h"
#include "nsAttrValueOrString.h"
#ifdef MOZ_XUL
#include "nsXULElement.h"
#endif /* MOZ_XUL */
#include "nsFrameManager.h"
#include "nsFrameSelection.h"
#ifdef DEBUG
#include "nsRange.h"
#endif
#include "nsBindingManager.h"
#include "nsXBLBinding.h"
#include "nsPIDOMWindow.h"
#include "nsPIBoxObject.h"
#include "nsClientRect.h"
#include "nsSVGUtils.h"
#include "nsLayoutUtils.h"
#include "nsGkAtoms.h"
#include "nsContentUtils.h"
#include "nsIDOMEventListener.h"
#include "nsIWebNavigation.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "jsapi.h"
#include "nsNodeInfoManager.h"
#include "nsICategoryManager.h"
#include "nsIDOMDocumentType.h"
#include "nsIDOMUserDataHandler.h"
#include "nsGenericHTMLElement.h"
#include "nsIEditor.h"
#include "nsIEditorIMESupport.h"
#include "nsEventDispatcher.h"
#include "nsContentCreatorFunctions.h"
#include "nsIControllers.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIScrollableFrame.h"
#include "nsXBLInsertionPoint.h"
#include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */
#include "nsRuleProcessorData.h"
#include "nsAsyncDOMEvent.h"
#include "nsTextNode.h"
#include "mozilla/dom/NodeListBinding.h"
#include "mozilla/dom/UndoManager.h"
#ifdef MOZ_XUL
#include "nsIXULDocument.h"
#endif /* MOZ_XUL */
#include "nsCycleCollectionParticipant.h"
#include "nsCCUncollectableMarker.h"
#include "mozAutoDocUpdate.h"
#include "prprf.h"
#include "nsDOMMutationObserver.h"
#include "nsWrapperCacheInlines.h"
#include "nsCycleCollector.h"
#include "xpcpublic.h"
#include "nsIScriptError.h"
#include "nsLayoutStatics.h"
#include "mozilla/Telemetry.h"
#include "mozilla/CORSMode.h"
#include "nsStyledElement.h"
using namespace mozilla;
using namespace mozilla::dom;
int32_t nsIContent::sTabFocusModel = eTabFocus_any;
bool nsIContent::sTabFocusModelAppliesToXUL = false;
uint32_t nsMutationGuard::sMutationCount = 0;
nsIContent*
nsIContent::FindFirstNonChromeOnlyAccessContent() const
{
// This handles also nested native anonymous content.
for (const nsIContent *content = this; content;
content = content->GetBindingParent()) {
if (!content->ChromeOnlyAccess()) {
// Oops, this function signature allows casting const to
// non-const. (Then again, so does GetChildAt(0)->GetParent().)
return const_cast<nsIContent*>(content);
}
}
return nullptr;
}
nsIContent*
nsIContent::GetFlattenedTreeParent() const
{
nsIContent *parent = GetParent();
if (parent && parent->HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsIDocument *doc = parent->OwnerDoc();
nsIContent* insertionElement =
doc->BindingManager()->GetNestedInsertionPoint(parent, this);
if (insertionElement) {
parent = insertionElement;
}
}
return parent;
}
nsIContent::IMEState
nsIContent::GetDesiredIMEState()
{
if (!IsEditableInternal()) {
// Check for the special case where we're dealing with elements which don't
// have the editable flag set, but are readwrite (such as text controls).
if (!IsElement() ||
!AsElement()->State().HasState(NS_EVENT_STATE_MOZ_READWRITE)) {
return IMEState(IMEState::DISABLED);
}
}
// NOTE: The content for independent editors (e.g., input[type=text],
// textarea) must override this method, so, we don't need to worry about
// that here.
nsIContent *editableAncestor = GetEditingHost();
// This is in another editable content, use the result of it.
if (editableAncestor && editableAncestor != this) {
return editableAncestor->GetDesiredIMEState();
}
nsIDocument* doc = GetCurrentDoc();
if (!doc) {
return IMEState(IMEState::DISABLED);
}
nsIPresShell* ps = doc->GetShell();
if (!ps) {
return IMEState(IMEState::DISABLED);
}
nsPresContext* pc = ps->GetPresContext();
if (!pc) {
return IMEState(IMEState::DISABLED);
}
nsIEditor* editor = nsContentUtils::GetHTMLEditor(pc);
nsCOMPtr<nsIEditorIMESupport> imeEditor = do_QueryInterface(editor);
if (!imeEditor) {
return IMEState(IMEState::DISABLED);
}
IMEState state;
imeEditor->GetPreferredIMEState(&state);
return state;
}
bool
nsIContent::HasIndependentSelection()
{
nsIFrame* frame = GetPrimaryFrame();
return (frame && frame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION);
}
dom::Element*
nsIContent::GetEditingHost()
{
// If this isn't editable, return nullptr.
NS_ENSURE_TRUE(IsEditableInternal(), nullptr);
nsIDocument* doc = GetCurrentDoc();
NS_ENSURE_TRUE(doc, nullptr);
// If this is in designMode, we should return <body>
if (doc->HasFlag(NODE_IS_EDITABLE)) {
return doc->GetBodyElement();
}
nsIContent* content = this;
for (dom::Element* parent = GetParentElement();
parent && parent->HasFlag(NODE_IS_EDITABLE);
parent = content->GetParentElement()) {
content = parent;
}
return content->AsElement();
}
nsresult
nsIContent::LookupNamespaceURIInternal(const nsAString& aNamespacePrefix,
nsAString& aNamespaceURI) const
{
if (aNamespacePrefix.EqualsLiteral("xml")) {
// Special-case for xml prefix
aNamespaceURI.AssignLiteral("http://www.w3.org/XML/1998/namespace");
return NS_OK;
}
if (aNamespacePrefix.EqualsLiteral("xmlns")) {
// Special-case for xmlns prefix
aNamespaceURI.AssignLiteral("http://www.w3.org/2000/xmlns/");
return NS_OK;
}
nsCOMPtr<nsIAtom> name;
if (!aNamespacePrefix.IsEmpty()) {
name = do_GetAtom(aNamespacePrefix);
NS_ENSURE_TRUE(name, NS_ERROR_OUT_OF_MEMORY);
}
else {
name = nsGkAtoms::xmlns;
}
// Trace up the content parent chain looking for the namespace
// declaration that declares aNamespacePrefix.
const nsIContent* content = this;
do {
if (content->GetAttr(kNameSpaceID_XMLNS, name, aNamespaceURI))
return NS_OK;
} while ((content = content->GetParent()));
return NS_ERROR_FAILURE;
}
already_AddRefed<nsIURI>
nsIContent::GetBaseURI() const
{
nsIDocument* doc = OwnerDoc();
// Start with document base
nsCOMPtr<nsIURI> base = doc->GetDocBaseURI();
// Collect array of xml:base attribute values up the parent chain. This
// is slightly slower for the case when there are xml:base attributes, but
// faster for the far more common case of there not being any such
// attributes.
// Also check for SVG elements which require special handling
nsAutoTArray<nsString, 5> baseAttrs;
nsString attr;
const nsIContent *elem = this;
do {
// First check for SVG specialness (why is this SVG specific?)
if (elem->IsSVG()) {
nsIContent* bindingParent = elem->GetBindingParent();
if (bindingParent) {
nsXBLBinding* binding =
bindingParent->OwnerDoc()->BindingManager()->GetBinding(bindingParent);
if (binding) {
// XXX sXBL/XBL2 issue
// If this is an anonymous XBL element use the binding
// document for the base URI.
// XXX Will fail with xml:base
base = binding->PrototypeBinding()->DocURI();
break;
}
}
}
nsIURI* explicitBaseURI = elem->GetExplicitBaseURI();
if (explicitBaseURI) {
base = explicitBaseURI;
break;
}
// Otherwise check for xml:base attribute
elem->GetAttr(kNameSpaceID_XML, nsGkAtoms::base, attr);
if (!attr.IsEmpty()) {
baseAttrs.AppendElement(attr);
}
elem = elem->GetParent();
} while(elem);
// Now resolve against all xml:base attrs
for (uint32_t i = baseAttrs.Length() - 1; i != uint32_t(-1); --i) {
nsCOMPtr<nsIURI> newBase;
nsresult rv = NS_NewURI(getter_AddRefs(newBase), baseAttrs[i],
doc->GetDocumentCharacterSet().get(), base);
// Do a security check, almost the same as nsDocument::SetBaseURL()
// Only need to do this on the final uri
if (NS_SUCCEEDED(rv) && i == 0) {
rv = nsContentUtils::GetSecurityManager()->
CheckLoadURIWithPrincipal(NodePrincipal(), newBase,
nsIScriptSecurityManager::STANDARD);
}
if (NS_SUCCEEDED(rv)) {
base.swap(newBase);
}
}
return base.forget();
}
//----------------------------------------------------------------------
static inline JSObject*
GetJSObjectChild(nsWrapperCache* aCache)
{
return aCache->PreservingWrapper() ? aCache->GetWrapperPreserveColor() : nullptr;
}
static bool
NeedsScriptTraverse(nsWrapperCache* aCache)
{
JSObject* o = GetJSObjectChild(aCache);
return o && xpc_IsGrayGCThing(o);
}
//----------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsChildContentList)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsChildContentList)
// If nsChildContentList is changed so that any additional fields are
// traversed by the cycle collector, then CAN_SKIP must be updated to
// check that the additional fields are null.
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsChildContentList)
// nsChildContentList only ever has a single child, its wrapper, so if
// the wrapper is black, the list can't be part of a garbage cycle.
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsChildContentList)
return !NeedsScriptTraverse(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsChildContentList)
return !NeedsScriptTraverse(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
// CanSkipThis returns false to avoid problems with incomplete unlinking.
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsChildContentList)
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
NS_INTERFACE_TABLE_HEAD(nsChildContentList)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_TABLE2(nsChildContentList, nsINodeList, nsIDOMNodeList)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsChildContentList)
NS_INTERFACE_MAP_END
JSObject*
nsChildContentList::WrapObject(JSContext *cx, JS::Handle<JSObject*> scope)
{
return NodeListBinding::Wrap(cx, scope, this);
}
NS_IMETHODIMP
nsChildContentList::GetLength(uint32_t* aLength)
{
*aLength = mNode ? mNode->GetChildCount() : 0;
return NS_OK;
}
NS_IMETHODIMP
nsChildContentList::Item(uint32_t aIndex, nsIDOMNode** aReturn)
{
nsINode* node = Item(aIndex);
if (!node) {
*aReturn = nullptr;
return NS_OK;
}
return CallQueryInterface(node, aReturn);
}
nsIContent*
nsChildContentList::Item(uint32_t aIndex)
{
if (mNode) {
return mNode->GetChildAt(aIndex);
}
return nullptr;
}
int32_t
nsChildContentList::IndexOf(nsIContent* aContent)
{
if (mNode) {
return mNode->IndexOf(aContent);
}
return -1;
}
//----------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_1(nsNode3Tearoff, mNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsNode3Tearoff)
NS_INTERFACE_MAP_ENTRY(nsIDOMXPathNSResolver)
NS_INTERFACE_MAP_END_AGGREGATED(mNode)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNode3Tearoff)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsNode3Tearoff)
NS_IMETHODIMP
nsNode3Tearoff::LookupNamespaceURI(const nsAString& aNamespacePrefix,
nsAString& aNamespaceURI)
{
mNode->LookupNamespaceURI(aNamespacePrefix, aNamespaceURI);
return NS_OK;
}
nsIHTMLCollection*
FragmentOrElement::Children()
{
FragmentOrElement::nsDOMSlots *slots = DOMSlots();
if (!slots->mChildrenList) {
slots->mChildrenList = new nsContentList(this, kNameSpaceID_Wildcard,
nsGkAtoms::_asterix, nsGkAtoms::_asterix,
false);
}
return slots->mChildrenList;
}
//----------------------------------------------------------------------
NS_IMPL_ISUPPORTS1(nsNodeWeakReference,
nsIWeakReference)
nsNodeWeakReference::~nsNodeWeakReference()
{
if (mNode) {
NS_ASSERTION(mNode->Slots()->mWeakReference == this,
"Weak reference has wrong value");
mNode->Slots()->mWeakReference = nullptr;
}
}
NS_IMETHODIMP
nsNodeWeakReference::QueryReferent(const nsIID& aIID, void** aInstancePtr)
{
return mNode ? mNode->QueryInterface(aIID, aInstancePtr) :
NS_ERROR_NULL_POINTER;
}
NS_IMPL_CYCLE_COLLECTION_1(nsNodeSupportsWeakRefTearoff, mNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsNodeSupportsWeakRefTearoff)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_END_AGGREGATED(mNode)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNodeSupportsWeakRefTearoff)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsNodeSupportsWeakRefTearoff)
NS_IMETHODIMP
nsNodeSupportsWeakRefTearoff::GetWeakReference(nsIWeakReference** aInstancePtr)
{
nsINode::nsSlots* slots = mNode->Slots();
if (!slots->mWeakReference) {
slots->mWeakReference = new nsNodeWeakReference(mNode);
NS_ENSURE_TRUE(slots->mWeakReference, NS_ERROR_OUT_OF_MEMORY);
}
NS_ADDREF(*aInstancePtr = slots->mWeakReference);
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_1(nsTouchEventReceiverTearoff, mElement)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTouchEventReceiverTearoff)
NS_INTERFACE_MAP_ENTRY(nsITouchEventReceiver)
NS_INTERFACE_MAP_END_AGGREGATED(mElement)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTouchEventReceiverTearoff)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTouchEventReceiverTearoff)
//----------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_1(nsInlineEventHandlersTearoff, mElement)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsInlineEventHandlersTearoff)
NS_INTERFACE_MAP_ENTRY(nsIInlineEventHandlers)
NS_INTERFACE_MAP_END_AGGREGATED(mElement)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsInlineEventHandlersTearoff)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsInlineEventHandlersTearoff)
//----------------------------------------------------------------------
FragmentOrElement::nsDOMSlots::nsDOMSlots()
: nsINode::nsSlots(),
mDataset(nullptr),
mUndoManager(nullptr),
mBindingParent(nullptr)
{
}
FragmentOrElement::nsDOMSlots::~nsDOMSlots()
{
if (mAttributeMap) {
mAttributeMap->DropReference();
}
if (mClassList) {
mClassList->DropReference();
}
}
void
FragmentOrElement::nsDOMSlots::Traverse(nsCycleCollectionTraversalCallback &cb, bool aIsXUL)
{
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mStyle");
cb.NoteXPCOMChild(mStyle.get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mSMILOverrideStyle");
cb.NoteXPCOMChild(mSMILOverrideStyle.get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mAttributeMap");
cb.NoteXPCOMChild(mAttributeMap.get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mUndoManager");
cb.NoteXPCOMChild(mUndoManager.get());
if (aIsXUL) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mControllers");
cb.NoteXPCOMChild(mControllers);
}
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mChildrenList");
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIDOMNodeList*, mChildrenList));
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mClassList");
cb.NoteXPCOMChild(mClassList.get());
}
void
FragmentOrElement::nsDOMSlots::Unlink(bool aIsXUL)
{
mStyle = nullptr;
mSMILOverrideStyle = nullptr;
if (mAttributeMap) {
mAttributeMap->DropReference();
mAttributeMap = nullptr;
}
if (aIsXUL)
NS_IF_RELEASE(mControllers);
mChildrenList = nullptr;
mUndoManager = nullptr;
if (mClassList) {
mClassList->DropReference();
mClassList = nullptr;
}
}
size_t
FragmentOrElement::nsDOMSlots::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
if (mAttributeMap) {
n += mAttributeMap->SizeOfIncludingThis(aMallocSizeOf);
}
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - Superclass members (nsINode::nsSlots)
// - mStyle
// - mDataSet
// - mSMILOverrideStyle
// - mSMILOverrideStyleRule
// - mChildrenList
// - mClassList
// The following members are not measured:
// - mBindingParent / mControllers: because they're non-owning
return n;
}
FragmentOrElement::FragmentOrElement(already_AddRefed<nsINodeInfo> aNodeInfo)
: nsIContent(aNodeInfo)
{
}
FragmentOrElement::~FragmentOrElement()
{
NS_PRECONDITION(!IsInDoc(),
"Please remove this from the document properly");
if (GetParent()) {
NS_RELEASE(mParent);
}
}
already_AddRefed<nsINodeList>
FragmentOrElement::GetChildren(uint32_t aFilter)
{
nsRefPtr<nsSimpleContentList> list = new nsSimpleContentList(this);
if (!list) {
return nullptr;
}
nsIFrame *frame = GetPrimaryFrame();
// Append :before generated content.
if (frame) {
nsIFrame *beforeFrame = nsLayoutUtils::GetBeforeFrame(frame);
if (beforeFrame) {
list->AppendElement(beforeFrame->GetContent());
}
}
// If XBL is bound to this node then append XBL anonymous content including
// explict content altered by insertion point if we were requested for XBL
// anonymous content, otherwise append explicit content with respect to
// insertion point if any.
nsINodeList *childList = nullptr;
nsIDocument* document = OwnerDoc();
if (!(aFilter & eAllButXBL)) {
childList = document->BindingManager()->GetXBLChildNodesFor(this);
if (!childList) {
childList = ChildNodes();
}
} else {
childList = document->BindingManager()->GetContentListFor(this);
}
if (childList) {
uint32_t length = 0;
childList->GetLength(&length);
for (uint32_t idx = 0; idx < length; idx++) {
nsIContent* child = childList->Item(idx);
list->AppendElement(child);
}
}
if (frame) {
// Append native anonymous content to the end.
nsIAnonymousContentCreator* creator = do_QueryFrame(frame);
if (creator) {
creator->AppendAnonymousContentTo(*list, aFilter);
}
// Append :after generated content.
nsIFrame *afterFrame = nsLayoutUtils::GetAfterFrame(frame);
if (afterFrame) {
list->AppendElement(afterFrame->GetContent());
}
}
return list.forget();
}
static nsIContent*
FindChromeAccessOnlySubtreeOwner(nsIContent* aContent)
{
if (aContent->ChromeOnlyAccess()) {
bool chromeAccessOnly = false;
while (aContent && !chromeAccessOnly) {
chromeAccessOnly = aContent->IsRootOfChromeAccessOnlySubtree();
aContent = aContent->GetParent();
}
}
return aContent;
}
nsresult
nsIContent::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
//FIXME! Document how this event retargeting works, Bug 329124.
aVisitor.mCanHandle = true;
aVisitor.mMayHaveListenerManager = HasListenerManager();
// Don't propagate mouseover and mouseout events when mouse is moving
// inside chrome access only content.
bool isAnonForEvents = IsRootOfChromeAccessOnlySubtree();
if ((aVisitor.mEvent->message == NS_MOUSE_ENTER_SYNTH ||
aVisitor.mEvent->message == NS_MOUSE_EXIT_SYNTH) &&
// Check if we should stop event propagation when event has just been
// dispatched or when we're about to propagate from
// chrome access only subtree.
((this == aVisitor.mEvent->originalTarget &&
!ChromeOnlyAccess()) || isAnonForEvents)) {
nsCOMPtr<nsIContent> relatedTarget =
do_QueryInterface(static_cast<nsMouseEvent*>
(aVisitor.mEvent)->relatedTarget);
if (relatedTarget &&
relatedTarget->OwnerDoc() == OwnerDoc()) {
// If current target is anonymous for events or we know that related
// target is descendant of an element which is anonymous for events,
// we may want to stop event propagation.
// If this is the original target, aVisitor.mRelatedTargetIsInAnon
// must be updated.
if (isAnonForEvents || aVisitor.mRelatedTargetIsInAnon ||
(aVisitor.mEvent->originalTarget == this &&
(aVisitor.mRelatedTargetIsInAnon =
relatedTarget->ChromeOnlyAccess()))) {
nsIContent* anonOwner = FindChromeAccessOnlySubtreeOwner(this);
if (anonOwner) {
nsIContent* anonOwnerRelated =
FindChromeAccessOnlySubtreeOwner(relatedTarget);
if (anonOwnerRelated) {
// Note, anonOwnerRelated may still be inside some other
// native anonymous subtree. The case where anonOwner is still
// inside native anonymous subtree will be handled when event
// propagates up in the DOM tree.
while (anonOwner != anonOwnerRelated &&
anonOwnerRelated->ChromeOnlyAccess()) {
anonOwnerRelated = FindChromeAccessOnlySubtreeOwner(anonOwnerRelated);
}
if (anonOwner == anonOwnerRelated) {
#ifdef DEBUG_smaug
nsCOMPtr<nsIContent> originalTarget =
do_QueryInterface(aVisitor.mEvent->originalTarget);
nsAutoString ot, ct, rt;
if (originalTarget) {
originalTarget->Tag()->ToString(ot);
}
Tag()->ToString(ct);
relatedTarget->Tag()->ToString(rt);
printf("Stopping %s propagation:"
"\n\toriginalTarget=%s \n\tcurrentTarget=%s %s"
"\n\trelatedTarget=%s %s \n%s",
(aVisitor.mEvent->message == NS_MOUSE_ENTER_SYNTH)
? "mouseover" : "mouseout",
NS_ConvertUTF16toUTF8(ot).get(),
NS_ConvertUTF16toUTF8(ct).get(),
isAnonForEvents
? "(is native anonymous)"
: (ChromeOnlyAccess()
? "(is in native anonymous subtree)" : ""),
NS_ConvertUTF16toUTF8(rt).get(),
relatedTarget->ChromeOnlyAccess()
? "(is in native anonymous subtree)" : "",
(originalTarget &&
relatedTarget->FindFirstNonChromeOnlyAccessContent() ==
originalTarget->FindFirstNonChromeOnlyAccessContent())
? "" : "Wrong event propagation!?!\n");
#endif
aVisitor.mParentTarget = nullptr;
// Event should not propagate to non-anon content.
aVisitor.mCanHandle = isAnonForEvents;
return NS_OK;
}
}
}
}
}
}
nsIContent* parent = GetParent();
// Event may need to be retargeted if this is the root of a native
// anonymous content subtree or event is dispatched somewhere inside XBL.
if (isAnonForEvents) {
#ifdef DEBUG
// If a DOM event is explicitly dispatched using node.dispatchEvent(), then
// all the events are allowed even in the native anonymous content..
nsCOMPtr<nsIContent> t = do_QueryInterface(aVisitor.mEvent->originalTarget);
NS_ASSERTION(!t || !t->ChromeOnlyAccess() ||
aVisitor.mEvent->eventStructType != NS_MUTATION_EVENT ||
aVisitor.mDOMEvent,
"Mutation event dispatched in native anonymous content!?!");
#endif
aVisitor.mEventTargetAtParent = parent;
} else if (parent && aVisitor.mOriginalTargetIsInAnon) {
nsCOMPtr<nsIContent> content(do_QueryInterface(aVisitor.mEvent->target));
if (content && content->GetBindingParent() == parent) {
aVisitor.mEventTargetAtParent = parent;
}
}
// check for an anonymous parent
// XXX XBL2/sXBL issue
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsIContent* insertionParent = OwnerDoc()->BindingManager()->
GetInsertionParent(this);
NS_ASSERTION(!(aVisitor.mEventTargetAtParent && insertionParent &&
aVisitor.mEventTargetAtParent != insertionParent),
"Retargeting and having insertion parent!");
if (insertionParent) {
parent = insertionParent;
}
}
if (parent) {
aVisitor.mParentTarget = parent;
} else {
aVisitor.mParentTarget = GetCurrentDoc();
}
return NS_OK;
}
bool
nsIContent::GetAttr(int32_t aNameSpaceID, nsIAtom* aName,
nsAString& aResult) const
{
if (IsElement()) {
return AsElement()->GetAttr(aNameSpaceID, aName, aResult);
}
aResult.Truncate();
return false;
}
bool
nsIContent::HasAttr(int32_t aNameSpaceID, nsIAtom* aName) const
{
return IsElement() && AsElement()->HasAttr(aNameSpaceID, aName);
}
bool
nsIContent::AttrValueIs(int32_t aNameSpaceID,
nsIAtom* aName,
const nsAString& aValue,
nsCaseTreatment aCaseSensitive) const
{
return IsElement() &&
AsElement()->AttrValueIs(aNameSpaceID, aName, aValue, aCaseSensitive);
}
bool
nsIContent::AttrValueIs(int32_t aNameSpaceID,
nsIAtom* aName,
nsIAtom* aValue,
nsCaseTreatment aCaseSensitive) const
{
return IsElement() &&
AsElement()->AttrValueIs(aNameSpaceID, aName, aValue, aCaseSensitive);
}
const nsAttrValue*
FragmentOrElement::DoGetClasses() const
{
NS_NOTREACHED("Shouldn't ever be called");
return nullptr;
}
NS_IMETHODIMP
FragmentOrElement::WalkContentStyleRules(nsRuleWalker* aRuleWalker)
{
return NS_OK;
}
bool
FragmentOrElement::IsLink(nsIURI** aURI) const
{
*aURI = nullptr;
return false;
}
nsIContent*
FragmentOrElement::GetBindingParent() const
{
nsDOMSlots *slots = GetExistingDOMSlots();
if (slots) {
return slots->mBindingParent;
}
return nullptr;
}
nsresult
FragmentOrElement::InsertChildAt(nsIContent* aKid,
uint32_t aIndex,
bool aNotify)
{
NS_PRECONDITION(aKid, "null ptr");
return doInsertChildAt(aKid, aIndex, aNotify, mAttrsAndChildren);
}
void
FragmentOrElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
{
nsCOMPtr<nsIContent> oldKid = mAttrsAndChildren.GetSafeChildAt(aIndex);
NS_ASSERTION(oldKid == GetChildAt(aIndex), "Unexpected child in RemoveChildAt");
if (oldKid) {
doRemoveChildAt(aIndex, aNotify, oldKid, mAttrsAndChildren);
}
}
void
FragmentOrElement::GetTextContentInternal(nsAString& aTextContent)
{
nsContentUtils::GetNodeTextContent(this, true, aTextContent);
}
void
FragmentOrElement::SetTextContentInternal(const nsAString& aTextContent,
ErrorResult& aError)
{
aError = nsContentUtils::SetNodeTextContent(this, aTextContent, false);
}
void
FragmentOrElement::DestroyContent()
{
nsIDocument *document = OwnerDoc();
document->BindingManager()->RemovedFromDocument(this, document);
document->ClearBoxObjectFor(this);
// XXX We really should let cycle collection do this, but that currently still
// leaks (see https://bugzilla.mozilla.org/show_bug.cgi?id=406684).
nsContentUtils::ReleaseWrapper(this, this);
uint32_t i, count = mAttrsAndChildren.ChildCount();
for (i = 0; i < count; ++i) {
// The child can remove itself from the parent in BindToTree.
mAttrsAndChildren.ChildAt(i)->DestroyContent();
}
}
void
FragmentOrElement::SaveSubtreeState()
{
uint32_t i, count = mAttrsAndChildren.ChildCount();
for (i = 0; i < count; ++i) {
mAttrsAndChildren.ChildAt(i)->SaveSubtreeState();
}
}
//----------------------------------------------------------------------
// Generic DOMNode implementations
void
FragmentOrElement::FireNodeInserted(nsIDocument* aDoc,
nsINode* aParent,
nsTArray<nsCOMPtr<nsIContent> >& aNodes)
{
uint32_t count = aNodes.Length();
for (uint32_t i = 0; i < count; ++i) {
nsIContent* childContent = aNodes[i];
if (nsContentUtils::HasMutationListeners(childContent,
NS_EVENT_BITS_MUTATION_NODEINSERTED, aParent)) {
nsMutationEvent mutation(true, NS_MUTATION_NODEINSERTED);
mutation.mRelatedNode = do_QueryInterface(aParent);
mozAutoSubtreeModified subtree(aDoc, aParent);
(new nsAsyncDOMEvent(childContent, mutation))->RunDOMEventWhenSafe();
}
}
}
//----------------------------------------------------------------------
// nsISupports implementation
#define SUBTREE_UNBINDINGS_PER_RUNNABLE 500
class ContentUnbinder : public nsRunnable
{
public:
ContentUnbinder()
{
nsLayoutStatics::AddRef();
mLast = this;
}
~ContentUnbinder()
{
Run();
nsLayoutStatics::Release();
}
void UnbindSubtree(nsIContent* aNode)
{
if (aNode->NodeType() != nsIDOMNode::ELEMENT_NODE &&
aNode->NodeType() != nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
return;
}
FragmentOrElement* container = static_cast<FragmentOrElement*>(aNode);
uint32_t childCount = container->mAttrsAndChildren.ChildCount();
if (childCount) {
while (childCount-- > 0) {
// Hold a strong ref to the node when we remove it, because we may be
// the last reference to it. We need to call TakeChildAt() and
// update mFirstChild before calling UnbindFromTree, since this last
// can notify various observers and they should really see consistent
// tree state.
nsCOMPtr<nsIContent> child =
container->mAttrsAndChildren.TakeChildAt(childCount);
if (childCount == 0) {
container->mFirstChild = nullptr;
}
UnbindSubtree(child);
child->UnbindFromTree();
}
}
}
NS_IMETHOD Run()
{
nsAutoScriptBlocker scriptBlocker;
uint32_t len = mSubtreeRoots.Length();
if (len) {
PRTime start = PR_Now();
for (uint32_t i = 0; i < len; ++i) {
UnbindSubtree(mSubtreeRoots[i]);
}
mSubtreeRoots.Clear();
Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_CONTENT_UNBIND,
uint32_t(PR_Now() - start) / PR_USEC_PER_MSEC);
}
if (this == sContentUnbinder) {
sContentUnbinder = nullptr;
if (mNext) {
nsRefPtr<ContentUnbinder> next;
next.swap(mNext);
sContentUnbinder = next;
next->mLast = mLast;
mLast = nullptr;
NS_DispatchToMainThread(next);
}
}
return NS_OK;
}
static void UnbindAll()
{
nsRefPtr<ContentUnbinder> ub = sContentUnbinder;
sContentUnbinder = nullptr;
while (ub) {
ub->Run();
ub = ub->mNext;
}
}
static void Append(nsIContent* aSubtreeRoot)
{
if (!sContentUnbinder) {
sContentUnbinder = new ContentUnbinder();
nsCOMPtr<nsIRunnable> e = sContentUnbinder;
NS_DispatchToMainThread(e);
}
if (sContentUnbinder->mLast->mSubtreeRoots.Length() >=
SUBTREE_UNBINDINGS_PER_RUNNABLE) {
sContentUnbinder->mLast->mNext = new ContentUnbinder();
sContentUnbinder->mLast = sContentUnbinder->mLast->mNext;
}
sContentUnbinder->mLast->mSubtreeRoots.AppendElement(aSubtreeRoot);
}
private:
nsAutoTArray<nsCOMPtr<nsIContent>,
SUBTREE_UNBINDINGS_PER_RUNNABLE> mSubtreeRoots;
nsRefPtr<ContentUnbinder> mNext;
ContentUnbinder* mLast;
static ContentUnbinder* sContentUnbinder;
};
ContentUnbinder* ContentUnbinder::sContentUnbinder = nullptr;
void
FragmentOrElement::ClearContentUnbinder()
{
ContentUnbinder::UnbindAll();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FragmentOrElement)
nsINode::Unlink(tmp);
if (tmp->HasProperties()) {
if (tmp->IsHTML()) {
tmp->DeleteProperty(nsGkAtoms::microdataProperties);
tmp->DeleteProperty(nsGkAtoms::itemtype);
tmp->DeleteProperty(nsGkAtoms::itemref);
tmp->DeleteProperty(nsGkAtoms::itemprop);
}
}
// Unlink child content (and unbind our subtree).
if (tmp->UnoptimizableCCNode() || !nsCCUncollectableMarker::sGeneration) {
uint32_t childCount = tmp->mAttrsAndChildren.ChildCount();
if (childCount) {
// Don't allow script to run while we're unbinding everything.
nsAutoScriptBlocker scriptBlocker;
while (childCount-- > 0) {
// Hold a strong ref to the node when we remove it, because we may be
// the last reference to it. We need to call TakeChildAt() and
// update mFirstChild before calling UnbindFromTree, since this last
// can notify various observers and they should really see consistent
// tree state.
nsCOMPtr<nsIContent> child = tmp->mAttrsAndChildren.TakeChildAt(childCount);
if (childCount == 0) {
tmp->mFirstChild = nullptr;
}
child->UnbindFromTree();
}
}
} else if (!tmp->GetParent() && tmp->mAttrsAndChildren.ChildCount()) {
ContentUnbinder::Append(tmp);
} /* else {
The subtree root will end up to a ContentUnbinder, and that will
unbind the child nodes.
} */
// Unlink any DOM slots of interest.
{
nsDOMSlots *slots = tmp->GetExistingDOMSlots();
if (slots) {
slots->Unlink(tmp->IsXUL());
}
}
{
nsIDocument *doc;
if (!tmp->GetParentNode() && (doc = tmp->OwnerDoc())) {
doc->BindingManager()->RemovedFromDocument(tmp, doc);
}
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(FragmentOrElement)
void
FragmentOrElement::MarkUserData(void* aObject, nsIAtom* aKey, void* aChild,
void* aData)
{
uint32_t* gen = static_cast<uint32_t*>(aData);
xpc_MarkInCCGeneration(static_cast<nsISupports*>(aChild), *gen);
}
void
FragmentOrElement::MarkUserDataHandler(void* aObject, nsIAtom* aKey,
void* aChild, void* aData)
{
xpc_TryUnmarkWrappedGrayObject(static_cast<nsISupports*>(aChild));
}
void
FragmentOrElement::MarkNodeChildren(nsINode* aNode)
{
JSObject* o = GetJSObjectChild(aNode);
xpc_UnmarkGrayObject(o);
nsEventListenerManager* elm = aNode->GetListenerManager(false);
if (elm) {
elm->MarkForCC();
}
if (aNode->HasProperties()) {
nsIDocument* ownerDoc = aNode->OwnerDoc();
ownerDoc->PropertyTable(DOM_USER_DATA)->
Enumerate(aNode, FragmentOrElement::MarkUserData,
&nsCCUncollectableMarker::sGeneration);
ownerDoc->PropertyTable(DOM_USER_DATA_HANDLER)->
Enumerate(aNode, FragmentOrElement::MarkUserDataHandler,
&nsCCUncollectableMarker::sGeneration);
}
}
nsINode*
FindOptimizableSubtreeRoot(nsINode* aNode)
{
nsINode* p;
while ((p = aNode->GetParentNode())) {
if (aNode->UnoptimizableCCNode()) {
return nullptr;
}
aNode = p;
}
if (aNode->UnoptimizableCCNode()) {
return nullptr;
}
return aNode;
}
nsAutoTArray<nsINode*, 1020>* gCCBlackMarkedNodes = nullptr;
void
ClearBlackMarkedNodes()
{
if (!gCCBlackMarkedNodes) {
return;
}
uint32_t len = gCCBlackMarkedNodes->Length();
for (uint32_t i = 0; i < len; ++i) {
nsINode* n = gCCBlackMarkedNodes->ElementAt(i);
n->SetCCMarkedRoot(false);
n->SetInCCBlackTree(false);
}
delete gCCBlackMarkedNodes;
gCCBlackMarkedNodes = nullptr;
}
// static
bool
FragmentOrElement::CanSkipInCC(nsINode* aNode)
{
// Don't try to optimize anything during shutdown.
if (nsCCUncollectableMarker::sGeneration == 0) {
return false;
}
nsIDocument* currentDoc = aNode->GetCurrentDoc();
if (currentDoc &&
nsCCUncollectableMarker::InGeneration(currentDoc->GetMarkedCCGeneration())) {
return !NeedsScriptTraverse(aNode);
}
// Bail out early if aNode is somewhere in anonymous content,
// or otherwise unusual.
if (aNode->UnoptimizableCCNode()) {
return false;
}
nsINode* root =
currentDoc ? static_cast<nsINode*>(currentDoc) :
FindOptimizableSubtreeRoot(aNode);
if (!root) {
return false;
}
// Subtree has been traversed already.
if (root->CCMarkedRoot()) {
return root->InCCBlackTree() && !NeedsScriptTraverse(aNode);
}
if (!gCCBlackMarkedNodes) {
gCCBlackMarkedNodes = new nsAutoTArray<nsINode*, 1020>;
}
// nodesToUnpurple contains nodes which will be removed
// from the purple buffer if the DOM tree is black.
nsAutoTArray<nsIContent*, 1020> nodesToUnpurple;
// grayNodes need script traverse, so they aren't removed from
// the purple buffer, but are marked to be in black subtree so that
// traverse is faster.
nsAutoTArray<nsINode*, 1020> grayNodes;
bool foundBlack = root->IsBlack();
if (root != currentDoc) {
currentDoc = nullptr;
if (NeedsScriptTraverse(root)) {
grayNodes.AppendElement(root);
} else if (static_cast<nsIContent*>(root)->IsPurple()) {
nodesToUnpurple.AppendElement(static_cast<nsIContent*>(root));
}
}
// Traverse the subtree and check if we could know without CC
// that it is black.
// Note, this traverse is non-virtual and inline, so it should be a lot faster
// than CC's generic traverse.
for (nsIContent* node = root->GetFirstChild(); node;
node = node->GetNextNode(root)) {
foundBlack = foundBlack || node->IsBlack();
if (foundBlack && currentDoc) {
// If we can mark the whole document black, no need to optimize
// so much, since when the next purple node in the document will be
// handled, it is fast to check that currentDoc is in CCGeneration.
break;
}
if (NeedsScriptTraverse(node)) {
// Gray nodes need real CC traverse.
grayNodes.AppendElement(node);
} else if (node->IsPurple()) {
nodesToUnpurple.AppendElement(node);
}
}
root->SetCCMarkedRoot(true);
root->SetInCCBlackTree(foundBlack);
gCCBlackMarkedNodes->AppendElement(root);
if (!foundBlack) {
return false;
}
if (currentDoc) {
// Special case documents. If we know the document is black,
// we can mark the document to be in CCGeneration.
currentDoc->
MarkUncollectableForCCGeneration(nsCCUncollectableMarker::sGeneration);
} else {
for (uint32_t i = 0; i < grayNodes.Length(); ++i) {
nsINode* node = grayNodes[i];
node->SetInCCBlackTree(true);
}
gCCBlackMarkedNodes->AppendElements(grayNodes);
}
// Subtree is black, we can remove non-gray purple nodes from
// purple buffer.
for (uint32_t i = 0; i < nodesToUnpurple.Length(); ++i) {
nsIContent* purple = nodesToUnpurple[i];
// Can't remove currently handled purple node.
if (purple != aNode) {
purple->RemovePurple();
}
}
return !NeedsScriptTraverse(aNode);
}
nsAutoTArray<nsINode*, 1020>* gPurpleRoots = nullptr;
nsAutoTArray<nsIContent*, 1020>* gNodesToUnbind = nullptr;
void ClearCycleCollectorCleanupData()
{
if (gPurpleRoots) {
uint32_t len = gPurpleRoots->Length();
for (uint32_t i = 0; i < len; ++i) {
nsINode* n = gPurpleRoots->ElementAt(i);
n->SetIsPurpleRoot(false);
}
delete gPurpleRoots;
gPurpleRoots = nullptr;
}
if (gNodesToUnbind) {
uint32_t len = gNodesToUnbind->Length();
for (uint32_t i = 0; i < len; ++i) {
nsIContent* c = gNodesToUnbind->ElementAt(i);
c->SetIsPurpleRoot(false);
ContentUnbinder::Append(c);
}
delete gNodesToUnbind;
gNodesToUnbind = nullptr;
}
}
static bool
ShouldClearPurple(nsIContent* aContent)
{
if (aContent && aContent->IsPurple()) {
return true;
}
JSObject* o = GetJSObjectChild(aContent);
if (o && xpc_IsGrayGCThing(o)) {
return true;
}
if (aContent->HasListenerManager()) {
return true;
}
return aContent->HasProperties();
}
// If aNode is not optimizable, but is an element
// with a frame in a document which has currently active presshell,
// we can act as if it was optimizable. When the primary frame dies, aNode
// will end up to the purple buffer because of the refcount change.
bool
NodeHasActiveFrame(nsIDocument* aCurrentDoc, nsINode* aNode)
{
return aCurrentDoc->GetShell() && aNode->IsElement() &&
aNode->AsElement()->GetPrimaryFrame();
}
bool
OwnedByBindingManager(nsIDocument* aCurrentDoc, nsINode* aNode)
{
return aNode->IsElement() &&
aCurrentDoc->BindingManager()->GetBinding(aNode->AsElement());
}
// CanSkip checks if aNode is black, and if it is, returns
// true. If aNode is in a black DOM tree, CanSkip may also remove other objects
// from purple buffer and unmark event listeners and user data.
// If the root of the DOM tree is a document, less optimizations are done
// since checking the blackness of the current document is usually fast and we
// don't want slow down such common cases.
bool
FragmentOrElement::CanSkip(nsINode* aNode, bool aRemovingAllowed)
{
// Don't try to optimize anything during shutdown.
if (nsCCUncollectableMarker::sGeneration == 0) {
return false;
}
bool unoptimizable = aNode->UnoptimizableCCNode();
nsIDocument* currentDoc = aNode->GetCurrentDoc();
if (currentDoc &&
nsCCUncollectableMarker::InGeneration(currentDoc->GetMarkedCCGeneration()) &&
(!unoptimizable || NodeHasActiveFrame(currentDoc, aNode) ||
OwnedByBindingManager(currentDoc, aNode))) {
MarkNodeChildren(aNode);
return true;
}
if (unoptimizable) {
return false;
}
nsINode* root = currentDoc ? static_cast<nsINode*>(currentDoc) :
FindOptimizableSubtreeRoot(aNode);
if (!root) {
return false;
}
// Subtree has been traversed already, and aNode has
// been handled in a way that doesn't require revisiting it.
if (root->IsPurpleRoot()) {
return false;
}
// nodesToClear contains nodes which are either purple or
// gray.
nsAutoTArray<nsIContent*, 1020> nodesToClear;
bool foundBlack = root->IsBlack();
bool domOnlyCycle = false;
if (root != currentDoc) {
currentDoc = nullptr;
if (!foundBlack) {
domOnlyCycle = static_cast<nsIContent*>(root)->OwnedOnlyByTheDOMTree();
}
if (ShouldClearPurple(static_cast<nsIContent*>(root))) {
nodesToClear.AppendElement(static_cast<nsIContent*>(root));
}
}
// Traverse the subtree and check if we could know without CC
// that it is black.
// Note, this traverse is non-virtual and inline, so it should be a lot faster
// than CC's generic traverse.
for (nsIContent* node = root->GetFirstChild(); node;
node = node->GetNextNode(root)) {
foundBlack = foundBlack || node->IsBlack();
if (foundBlack) {
domOnlyCycle = false;
if (currentDoc) {
// If we can mark the whole document black, no need to optimize
// so much, since when the next purple node in the document will be
// handled, it is fast to check that the currentDoc is in CCGeneration.
break;
}
// No need to put stuff to the nodesToClear array, if we can clear it
// already here.
if (node->IsPurple() && (node != aNode || aRemovingAllowed)) {
node->RemovePurple();
}
MarkNodeChildren(node);
} else {
domOnlyCycle = domOnlyCycle && node->OwnedOnlyByTheDOMTree();
if (ShouldClearPurple(node)) {
// Collect interesting nodes which we can clear if we find that
// they are kept alive in a black tree or are in a DOM-only cycle.
nodesToClear.AppendElement(node);
}
}
}
if (!currentDoc || !foundBlack) {
root->SetIsPurpleRoot(true);
if (domOnlyCycle) {
if (!gNodesToUnbind) {
gNodesToUnbind = new nsAutoTArray<nsIContent*, 1020>();
}
gNodesToUnbind->AppendElement(static_cast<nsIContent*>(root));
for (uint32_t i = 0; i < nodesToClear.Length(); ++i) {
nsIContent* n = nodesToClear[i];
if ((n != aNode || aRemovingAllowed) && n->IsPurple()) {
n->RemovePurple();
}
}
return true;
} else {
if (!gPurpleRoots) {
gPurpleRoots = new nsAutoTArray<nsINode*, 1020>();
}
gPurpleRoots->AppendElement(root);
}
}
if (!foundBlack) {
return false;
}
if (currentDoc) {
// Special case documents. If we know the document is black,
// we can mark the document to be in CCGeneration.
currentDoc->
MarkUncollectableForCCGeneration(nsCCUncollectableMarker::sGeneration);
MarkNodeChildren(currentDoc);
}
// Subtree is black, so we can remove purple nodes from
// purple buffer and mark stuff that to be certainly alive.
for (uint32_t i = 0; i < nodesToClear.Length(); ++i) {
nsIContent* n = nodesToClear[i];
MarkNodeChildren(n);
// Can't remove currently handled purple node,
// unless aRemovingAllowed is true.
if ((n != aNode || aRemovingAllowed) && n->IsPurple()) {
n->RemovePurple();
}
}
return true;
}
bool
FragmentOrElement::CanSkipThis(nsINode* aNode)
{
if (nsCCUncollectableMarker::sGeneration == 0) {
return false;
}
if (aNode->IsBlack()) {
return true;
}
nsIDocument* c = aNode->GetCurrentDoc();
return
((c && nsCCUncollectableMarker::InGeneration(c->GetMarkedCCGeneration())) ||
aNode->InCCBlackTree()) && !NeedsScriptTraverse(aNode);
}
void
FragmentOrElement::InitCCCallbacks()
{
nsCycleCollector_setForgetSkippableCallback(ClearCycleCollectorCleanupData);
nsCycleCollector_setBeforeUnlinkCallback(ClearBlackMarkedNodes);
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(FragmentOrElement)
return FragmentOrElement::CanSkip(tmp, aRemovingAllowed);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(FragmentOrElement)
return FragmentOrElement::CanSkipInCC(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(FragmentOrElement)
return FragmentOrElement::CanSkipThis(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
static const char* kNSURIs[] = {
" ([none])",
" (xmlns)",
" (xml)",
" (xhtml)",
" (XLink)",
" (XSLT)",
" (XBL)",
" (MathML)",
" (RDF)",
" (XUL)",
" (SVG)",
" (XML Events)"
};
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(FragmentOrElement)
if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
char name[512];
uint32_t nsid = tmp->GetNameSpaceID();
nsAtomCString localName(tmp->NodeInfo()->NameAtom());
nsAutoCString uri;
if (tmp->OwnerDoc()->GetDocumentURI()) {
tmp->OwnerDoc()->GetDocumentURI()->GetSpec(uri);
}
nsAutoString id;
nsIAtom* idAtom = tmp->GetID();
if (idAtom) {
id.AppendLiteral(" id='");
id.Append(nsDependentAtomString(idAtom));
id.AppendLiteral("'");
}
nsAutoString classes;
const nsAttrValue* classAttrValue = tmp->GetClasses();
if (classAttrValue) {
classes.AppendLiteral(" class='");
nsAutoString classString;
classAttrValue->ToString(classString);
classString.ReplaceChar(PRUnichar('\n'), PRUnichar(' '));
classes.Append(classString);
classes.AppendLiteral("'");
}
const char* nsuri = nsid < ArrayLength(kNSURIs) ? kNSURIs[nsid] : "";
PR_snprintf(name, sizeof(name), "FragmentOrElement%s %s%s%s %s",
nsuri,
localName.get(),
NS_ConvertUTF16toUTF8(id).get(),
NS_ConvertUTF16toUTF8(classes).get(),
uri.get());
cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
}
else {
NS_IMPL_CYCLE_COLLECTION_DESCRIBE(FragmentOrElement, 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;
}
tmp->OwnerDoc()->BindingManager()->Traverse(tmp, cb);
if (tmp->HasProperties()) {
if (tmp->IsHTML()) {
nsISupports* property = static_cast<nsISupports*>
(tmp->GetProperty(nsGkAtoms::microdataProperties));
cb.NoteXPCOMChild(property);
property = static_cast<nsISupports*>(tmp->GetProperty(nsGkAtoms::itemref));
cb.NoteXPCOMChild(property);
property = static_cast<nsISupports*>(tmp->GetProperty(nsGkAtoms::itemprop));
cb.NoteXPCOMChild(property);
property = static_cast<nsISupports*>(tmp->GetProperty(nsGkAtoms::itemtype));
cb.NoteXPCOMChild(property);
}
}
// Traverse attribute names and child content.
{
uint32_t i;
uint32_t attrs = tmp->mAttrsAndChildren.AttrCount();
for (i = 0; i < attrs; i++) {
const nsAttrName* name = tmp->mAttrsAndChildren.AttrNameAt(i);
if (!name->IsAtom()) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb,
"mAttrsAndChildren[i]->NodeInfo()");
cb.NoteXPCOMChild(name->NodeInfo());
}
}
uint32_t kids = tmp->mAttrsAndChildren.ChildCount();
for (i = 0; i < kids; i++) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mAttrsAndChildren[i]");
cb.NoteXPCOMChild(tmp->mAttrsAndChildren.GetSafeChildAt(i));
}
}
// Traverse any DOM slots of interest.
{
nsDOMSlots *slots = tmp->GetExistingDOMSlots();
if (slots) {
slots->Traverse(cb, tmp->IsXUL());
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN(FragmentOrElement)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(FragmentOrElement)
NS_INTERFACE_MAP_ENTRY(Element)
NS_INTERFACE_MAP_ENTRY(nsIContent)
NS_INTERFACE_MAP_ENTRY(nsINode)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventTarget)
NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
new nsNodeSupportsWeakRefTearoff(this))
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsIDOMNodeSelector,
new nsNodeSelectorTearoff(this))
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsIDOMXPathNSResolver,
new nsNode3Tearoff(this))
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsITouchEventReceiver,
new nsTouchEventReceiverTearoff(this))
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsIInlineEventHandlers,
new nsInlineEventHandlersTearoff(this))
// nsNodeSH::PreCreate() depends on the identity pointer being the
// same as nsINode (which nsIContent inherits), so if you change the
// below line, make sure nsNodeSH::PreCreate() still does the right
// thing!
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContent)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(FragmentOrElement)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(FragmentOrElement,
nsNodeUtils::LastRelease(this))
nsresult
FragmentOrElement::PostQueryInterface(REFNSIID aIID, void** aInstancePtr)
{
return OwnerDoc()->BindingManager()->GetBindingImplementation(this, aIID,
aInstancePtr);
}
//----------------------------------------------------------------------
nsresult
FragmentOrElement::CopyInnerTo(FragmentOrElement* aDst)
{
uint32_t i, count = mAttrsAndChildren.AttrCount();
for (i = 0; i < count; ++i) {
const nsAttrName* name = mAttrsAndChildren.AttrNameAt(i);
const nsAttrValue* value = mAttrsAndChildren.AttrAt(i);
nsAutoString valStr;
value->ToString(valStr);
nsresult rv = aDst->SetAttr(name->NamespaceID(), name->LocalName(),
name->GetPrefix(), valStr, false);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
const nsTextFragment*
FragmentOrElement::GetText()
{
return nullptr;
}
uint32_t
FragmentOrElement::TextLength() const
{
// We can remove this assertion if it turns out to be useful to be able
// to depend on this returning 0
NS_NOTREACHED("called FragmentOrElement::TextLength");
return 0;
}
nsresult
FragmentOrElement::SetText(const PRUnichar* aBuffer, uint32_t aLength,
bool aNotify)
{
NS_ERROR("called FragmentOrElement::SetText");
return NS_ERROR_FAILURE;
}
nsresult
FragmentOrElement::AppendText(const PRUnichar* aBuffer, uint32_t aLength,
bool aNotify)
{
NS_ERROR("called FragmentOrElement::AppendText");
return NS_ERROR_FAILURE;
}
bool
FragmentOrElement::TextIsOnlyWhitespace()
{
return false;
}
void
FragmentOrElement::AppendTextTo(nsAString& aResult)
{
// We can remove this assertion if it turns out to be useful to be able
// to depend on this appending nothing.
NS_NOTREACHED("called FragmentOrElement::TextLength");
}
uint32_t
FragmentOrElement::GetChildCount() const
{
return mAttrsAndChildren.ChildCount();
}
nsIContent *
FragmentOrElement::GetChildAt(uint32_t aIndex) const
{
return mAttrsAndChildren.GetSafeChildAt(aIndex);
}
nsIContent * const *
FragmentOrElement::GetChildArray(uint32_t* aChildCount) const
{
return mAttrsAndChildren.GetChildArray(aChildCount);
}
int32_t
FragmentOrElement::IndexOf(const nsINode* aPossibleChild) const
{
return mAttrsAndChildren.IndexOfChild(aPossibleChild);
}
nsINode::nsSlots*
FragmentOrElement::CreateSlots()
{
return new nsDOMSlots();
}
void
FragmentOrElement::FireNodeRemovedForChildren()
{
nsIDocument* doc = OwnerDoc();
// Optimize the common case
if (!nsContentUtils::
HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
return;
}
nsCOMPtr<nsIDocument> owningDoc = doc;
nsCOMPtr<nsINode> child;
for (child = GetFirstChild();
child && child->GetParentNode() == this;
child = child->GetNextSibling()) {
nsContentUtils::MaybeFireNodeRemoved(child, this, doc);
}
}
size_t
FragmentOrElement::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = 0;
n += nsIContent::SizeOfExcludingThis(aMallocSizeOf);
n += mAttrsAndChildren.SizeOfExcludingThis(aMallocSizeOf);
nsDOMSlots* slots = GetExistingDOMSlots();
if (slots) {
n += slots->SizeOfIncludingThis(aMallocSizeOf);
}
return n;
}
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