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FragmentOrElement.cpp
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FragmentOrElement.cpp
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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/ArrayUtils.h"
#include "mozilla/Likely.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/FragmentOrElement.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/Attr.h"
#include "nsDOMAttributeMap.h"
#include "nsIAtom.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/dom/Event.h"
#include "nsIDocumentInlines.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMNodeList.h"
#include "nsIContentIterator.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 "nsIDOMEvent.h"
#include "nsDOMCID.h"
#include "nsIServiceManager.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsDOMCSSAttrDeclaration.h"
#include "nsNameSpaceManager.h"
#include "nsContentList.h"
#include "nsDOMTokenList.h"
#include "nsXBLPrototypeBinding.h"
#include "nsError.h"
#include "nsDOMString.h"
#include "nsIScriptSecurityManager.h"
#include "nsIDOMMutationEvent.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/MouseEvents.h"
#include "nsNodeUtils.h"
#include "nsDocument.h"
#include "nsAttrValueOrString.h"
#ifdef MOZ_XUL
#include "nsXULElement.h"
#endif /* MOZ_XUL */
#include "nsFrameSelection.h"
#ifdef DEBUG
#include "nsRange.h"
#endif
#include "nsBindingManager.h"
#include "nsXBLBinding.h"
#include "nsPIDOMWindow.h"
#include "nsPIBoxObject.h"
#include "nsSVGUtils.h"
#include "nsLayoutUtils.h"
#include "nsGkAtoms.h"
#include "nsContentUtils.h"
#include "nsTextFragment.h"
#include "nsContentCID.h"
#include "nsIDOMEventListener.h"
#include "nsIWebNavigation.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "js/GCAPI.h"
#include "nsNodeInfoManager.h"
#include "nsICategoryManager.h"
#include "nsGenericHTMLElement.h"
#include "nsIEditor.h"
#include "nsIEditorIMESupport.h"
#include "nsContentCreatorFunctions.h"
#include "nsIControllers.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIScrollableFrame.h"
#include "ChildIterator.h"
#include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */
#include "nsRuleProcessorData.h"
#include "nsTextNode.h"
#include "mozilla/dom/NodeListBinding.h"
#include "mozilla/dom/UndoManager.h"
#ifdef MOZ_XUL
#include "nsIXULDocument.h"
#endif /* MOZ_XUL */
#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 "mozilla/Telemetry.h"
#include "mozilla/CORSMode.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "nsStyledElement.h"
#include "nsIContentInlines.h"
using namespace mozilla;
using namespace mozilla::dom;
int32_t nsIContent::sTabFocusModel = eTabFocus_any;
bool nsIContent::sTabFocusModelAppliesToXUL = false;
uint64_t nsMutationGuard::sGeneration = 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 && nsContentUtils::HasDistributedChildren(parent) &&
nsContentUtils::IsInSameAnonymousTree(parent, this)) {
// This node is distributed to insertion points, thus we
// need to consult the destination insertion points list to
// figure out where this node was inserted in the flattened tree.
// It may be the case that |parent| distributes its children
// but the child does not match any insertion points, thus
// the flattened tree parent is nullptr.
nsTArray<nsIContent*>* destInsertionPoints = GetExistingDestInsertionPoints();
parent = destInsertionPoints && !destInsertionPoints->IsEmpty() ?
destInsertionPoints->LastElement()->GetParent() : nullptr;
} else if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsIContent* insertionParent = GetXBLInsertionParent();
if (insertionParent) {
parent = insertionParent;
}
}
// Shadow roots never shows up in the flattened tree. Return the host
// instead.
if (parent && parent->IsInShadowTree()) {
ShadowRoot* parentShadowRoot = ShadowRoot::FromNode(parent);
if (parentShadowRoot) {
return parentShadowRoot->GetHost();
}
}
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 = GetComposedDoc();
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 = GetComposedDoc();
NS_ENSURE_TRUE(doc, nullptr);
// If this is in designMode, we should return <body>
if (doc->HasFlag(NODE_IS_EDITABLE) && !IsInShadowTree()) {
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(bool aTryUseXHRDocBaseURI) const
{
nsIDocument* doc = OwnerDoc();
// Start with document base
nsCOMPtr<nsIURI> base = doc->GetBaseURI(aTryUseXHRDocBaseURI);
// 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->GetXBLBinding();
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(nsINode* aNode)
{
return aNode->PreservingWrapper() && aNode->GetWrapperPreserveColor() &&
!aNode->IsBlackAndDoesNotNeedTracing(aNode);
}
//----------------------------------------------------------------------
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 tmp->IsBlack();
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsChildContentList)
return tmp->IsBlackAndDoesNotNeedTracing(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_TABLE_ENTRY
NS_INTERFACE_TABLE(nsChildContentList, nsINodeList, nsIDOMNodeList)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsChildContentList)
NS_INTERFACE_MAP_END
JSObject*
nsChildContentList::WrapObject(JSContext *cx)
{
return NodeListBinding::Wrap(cx, 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;
}
//----------------------------------------------------------------------
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_ISUPPORTS(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;
}
size_t
nsNodeWeakReference::SizeOfOnlyThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
return aMallocSizeOf(this);
}
NS_IMPL_CYCLE_COLLECTION(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;
}
//----------------------------------------------------------------------
FragmentOrElement::nsDOMSlots::nsDOMSlots()
: nsINode::nsSlots(),
mDataset(nullptr),
mUndoManager(nullptr),
mBindingParent(nullptr)
{
}
FragmentOrElement::nsDOMSlots::~nsDOMSlots()
{
if (mAttributeMap) {
mAttributeMap->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->mXBLBinding");
cb.NoteNativeChild(mXBLBinding, NS_CYCLE_COLLECTION_PARTICIPANT(nsXBLBinding));
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mXBLInsertionParent");
cb.NoteXPCOMChild(mXBLInsertionParent.get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mShadowRoot");
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mShadowRoot));
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mContainingShadow");
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mContainingShadow));
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());
if (mCustomElementData) {
for (uint32_t i = 0; i < mCustomElementData->mCallbackQueue.Length(); i++) {
mCustomElementData->mCallbackQueue[i]->Traverse(cb);
}
}
}
void
FragmentOrElement::nsDOMSlots::Unlink(bool aIsXUL)
{
mStyle = nullptr;
mSMILOverrideStyle = nullptr;
if (mAttributeMap) {
mAttributeMap->DropReference();
mAttributeMap = nullptr;
}
if (aIsXUL)
NS_IF_RELEASE(mControllers);
mXBLBinding = nullptr;
mXBLInsertionParent = nullptr;
mShadowRoot = nullptr;
mContainingShadow = nullptr;
mChildrenList = nullptr;
mUndoManager = nullptr;
mCustomElementData = nullptr;
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<mozilla::dom::NodeInfo>& aNodeInfo)
: nsIContent(aNodeInfo)
{
}
FragmentOrElement::FragmentOrElement(already_AddRefed<mozilla::dom::NodeInfo>&& 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);
AllChildrenIterator iter(this, aFilter);
while (nsIContent* kid = iter.GetNextChild()) {
list->AppendElement(kid);
}
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(EventChainPreVisitor& 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 ||
aVisitor.mEvent->message == NS_POINTER_OVER ||
aVisitor.mEvent->message == NS_POINTER_OUT) &&
// 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 or if we are about to propagate out of
// a shadow root to a shadow root host.
((this == aVisitor.mEvent->originalTarget &&
!ChromeOnlyAccess()) || isAnonForEvents || GetShadowRoot())) {
nsCOMPtr<nsIContent> relatedTarget =
do_QueryInterface(aVisitor.mEvent->AsMouseEvent()->relatedTarget);
if (relatedTarget &&
relatedTarget->OwnerDoc() == OwnerDoc()) {
// In the web components case, we may need to stop propagation of events
// at shadow root host.
if (GetShadowRoot()) {
nsIContent* adjustedTarget =
Event::GetShadowRelatedTarget(this, relatedTarget);
if (this == adjustedTarget) {
aVisitor.mParentTarget = nullptr;
aVisitor.mCanHandle = false;
return NS_OK;
}
}
// 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();
// Web components have a special event chain that need to account
// for destination insertion points where nodes have been distributed.
nsTArray<nsIContent*>* destPoints = GetExistingDestInsertionPoints();
if (destPoints && !destPoints->IsEmpty()) {
// Push destination insertion points to aVisitor.mDestInsertionPoints
// excluding shadow insertion points.
bool didPushNonShadowInsertionPoint = false;
for (uint32_t i = 0; i < destPoints->Length(); i++) {
nsIContent* point = destPoints->ElementAt(i);
if (!ShadowRoot::IsShadowInsertionPoint(point)) {
aVisitor.mDestInsertionPoints.AppendElement(point);
didPushNonShadowInsertionPoint = true;
}
}
// Next node in the event path is the final destination
// (non-shadow) insertion point that was pushed.
if (didPushNonShadowInsertionPoint) {
parent = aVisitor.mDestInsertionPoints.LastElement();
aVisitor.mDestInsertionPoints.SetLength(
aVisitor.mDestInsertionPoints.Length() - 1);
}
}
ShadowRoot* thisShadowRoot = ShadowRoot::FromNode(this);
if (thisShadowRoot) {
// The following events must always be stopped at the root node of the node tree:
// abort
// error
// select
// change
// load
// reset
// resize
// scroll
// selectstart
bool stopEvent = false;
switch (aVisitor.mEvent->message) {
case NS_IMAGE_ABORT:
case NS_LOAD_ERROR:
case NS_FORM_SELECTED:
case NS_FORM_CHANGE:
case NS_LOAD:
case NS_FORM_RESET:
case NS_RESIZE_EVENT:
case NS_SCROLL_EVENT:
stopEvent = true;
break;
case NS_USER_DEFINED_EVENT:
if (aVisitor.mDOMEvent) {
nsAutoString eventType;
aVisitor.mDOMEvent->GetType(eventType);
if (eventType.EqualsLiteral("abort") ||
eventType.EqualsLiteral("error") ||
eventType.EqualsLiteral("select") ||
eventType.EqualsLiteral("change") ||
eventType.EqualsLiteral("load") ||
eventType.EqualsLiteral("reset") ||
eventType.EqualsLiteral("resize") ||
eventType.EqualsLiteral("scroll") ||
eventType.EqualsLiteral("selectstart")) {
stopEvent = true;
}
}
break;
}
if (stopEvent) {
// If we do stop propagation, we still want to propagate
// the event to chrome (nsPIDOMWindow::GetParentTarget()).
// The load event is special in that we don't ever propagate it
// to chrome.
nsCOMPtr<nsPIDOMWindow> win = OwnerDoc()->GetWindow();
EventTarget* parentTarget = win && aVisitor.mEvent->message != NS_LOAD
? win->GetParentTarget() : nullptr;
aVisitor.mParentTarget = parentTarget;
return NS_OK;
}
if (!aVisitor.mDestInsertionPoints.IsEmpty()) {
parent = aVisitor.mDestInsertionPoints.LastElement();
aVisitor.mDestInsertionPoints.SetLength(
aVisitor.mDestInsertionPoints.Length() - 1);
} else {
// The pool host for the youngest shadow root is shadow DOM host,
// for older shadow roots, it is the shadow insertion point
// where the shadow root is projected, nullptr if none exists.
parent = thisShadowRoot->GetPoolHost();
}
}
// 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->mClass != eMutationEventClass ||
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 = GetXBLInsertionParent();
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 = GetComposedDoc();
}
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);
}
bool
nsIContent::IsFocusable(int32_t* aTabIndex, bool aWithMouse)
{
bool focusable = IsFocusableInternal(aTabIndex, aWithMouse);
// Ensure that the return value and aTabIndex are consistent in the case
// we're in userfocusignored context.
if (focusable || (aTabIndex && *aTabIndex != -1)) {
if (nsContentUtils::IsUserFocusIgnored(this)) {
if (aTabIndex) {
*aTabIndex = -1;
}
return false;
}
return focusable;
}
return false;
}
bool
nsIContent::IsFocusableInternal(int32_t* aTabIndex, bool aWithMouse)
{
if (aTabIndex) {
*aTabIndex = -1; // Default, not tabbable
}
return false;
}
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;
}
nsXBLBinding*
FragmentOrElement::GetXBLBinding() const
{
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsDOMSlots *slots = GetExistingDOMSlots();
if (slots) {
return slots->mXBLBinding;
}
}
return nullptr;