void
HTMLAnchorElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
// Cancel any DNS prefetches
// Note: Must come before ResetLinkState. If called after, it will recreate
// mCachedURI based on data that is invalid - due to a call to GetHostname.
// If prefetch was deferred, clear flag and move on
if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_DEFERRED))
UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
// Else if prefetch was requested, clear flag and send cancellation
else if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_REQUESTED)) {
UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
// Possible that hostname could have changed since binding, but since this
// covers common cases, most DNS prefetch requests will be canceled
nsHTMLDNSPrefetch::CancelPrefetchLow(this, NS_ERROR_ABORT);
}
// If this link is ever reinserted into a document, it might
// be under a different xml:base, so forget the cached state now.
Link::ResetLinkState(false, Link::ElementHasHref());
nsIDocument* doc = GetCurrentDoc();
if (doc) {
doc->UnregisterPendingLinkUpdate(this);
}
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}
void
CharacterData::UnbindFromTree(bool aDeep, bool aNullParent)
{
// Unset frame flags; if we need them again later, they'll get set again.
UnsetFlags(NS_CREATE_FRAME_IF_NON_WHITESPACE |
NS_REFRAME_IF_WHITESPACE);
nsIDocument* document = GetComposedDoc();
if (aNullParent) {
if (this->IsRootOfNativeAnonymousSubtree()) {
nsNodeUtils::NativeAnonymousChildListChange(this, true);
}
if (GetParent()) {
NS_RELEASE(mParent);
} else {
mParent = nullptr;
}
SetParentIsContent(false);
}
ClearInDocument();
if (aNullParent || !mParent->IsInShadowTree()) {
UnsetFlags(NODE_IS_IN_SHADOW_TREE);
// Begin keeping track of our subtree root.
SetSubtreeRootPointer(aNullParent ? this : mParent->SubtreeRoot());
}
if (document && !GetContainingShadow()) {
// Notify XBL- & nsIAnonymousContentCreator-generated
// anonymous content that the document is changing.
// Unlike XBL, bindings for web components shadow DOM
// do not get uninstalled.
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsContentUtils::AddScriptRunner(
new RemoveFromBindingManagerRunnable(document->BindingManager(), this,
document));
}
}
nsExtendedContentSlots* slots = GetExistingExtendedContentSlots();
if (slots) {
slots->mBindingParent = nullptr;
if (aNullParent || !mParent->IsInShadowTree()) {
slots->mContainingShadow = nullptr;
}
}
nsNodeUtils::ParentChainChanged(this);
}
void
HTMLImageElement::ClearForm(bool aRemoveFromForm)
{
NS_ASSERTION((mForm != nullptr) == HasFlag(ADDED_TO_FORM),
"Form control should have had flag set correctly");
if (!mForm) {
return;
}
if (aRemoveFromForm) {
nsAutoString nameVal, idVal;
GetAttr(kNameSpaceID_None, nsGkAtoms::name, nameVal);
GetAttr(kNameSpaceID_None, nsGkAtoms::id, idVal);
mForm->RemoveImageElement(this);
if (!nameVal.IsEmpty()) {
mForm->RemoveImageElementFromTable(this, nameVal,
HTMLFormElement::ElementRemoved);
}
if (!idVal.IsEmpty()) {
mForm->RemoveImageElementFromTable(this, idVal,
HTMLFormElement::ElementRemoved);
}
}
UnsetFlags(ADDED_TO_FORM);
mForm = nullptr;
}
void
HTMLImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
if (mForm) {
if (aNullParent || !FindAncestorForm(mForm)) {
ClearForm(true);
} else {
UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
}
}
if (mInDocResponsiveContent) {
nsIDocument* doc = GetOurOwnerDoc();
MOZ_ASSERT(doc);
if (doc) {
doc->RemoveResponsiveContent(this);
mInDocResponsiveContent = false;
}
}
if (GetParent() &&
GetParent()->IsHTMLElement(nsGkAtoms::picture) &&
HTMLPictureElement::IsPictureEnabled()) {
// Being removed from picture re-triggers selection, even if we
// weren't using a <source> peer
if (aNullParent) {
QueueImageLoadTask(true);
}
}
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}
bool CharacterData::TextIsOnlyWhitespace() {
MOZ_ASSERT(NS_IsMainThread());
if (!ThreadSafeTextIsOnlyWhitespace()) {
UnsetFlags(NS_TEXT_IS_ONLY_WHITESPACE);
SetFlags(NS_CACHED_TEXT_IS_ONLY_WHITESPACE);
return false;
}
SetFlags(NS_CACHED_TEXT_IS_ONLY_WHITESPACE | NS_TEXT_IS_ONLY_WHITESPACE);
return true;
}
void
HTMLImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
if (mForm) {
if (aNullParent || !FindAncestorForm(mForm)) {
ClearForm(true);
} else {
UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
}
}
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}
void
HTMLImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
if (mForm) {
if (aNullParent || !FindAncestorForm(mForm)) {
ClearForm(true);
} else {
UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
}
}
if (aNullParent &&
nsINode::GetParentNode()->Tag() == nsGkAtoms::picture &&
HTMLPictureElement::IsPictureEnabled()) {
// Being removed from picture re-triggers selection, even if we
// weren't using a <source> peer
QueueImageLoadTask();
}
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
}
void
RestyleTracker::DoProcessRestyles()
{
nsAutoCString docURL;
if (profiler_is_active()) {
nsIURI *uri = Document()->GetDocumentURI();
if (uri) {
uri->GetSpec(docURL);
} else {
docURL = "N/A";
}
}
PROFILER_LABEL_PRINTF("RestyleTracker", "ProcessRestyles",
js::ProfileEntry::Category::CSS, "(%s)", docURL.get());
nsDocShell* docShell = static_cast<nsDocShell*>(mRestyleManager->PresContext()->GetDocShell());
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
bool isTimelineRecording = timelines && timelines->HasConsumer(docShell);
// Create a AnimationsWithDestroyedFrame during restyling process to
// stop animations and transitions on elements that have no frame at the end
// of the restyling process.
RestyleManager::AnimationsWithDestroyedFrame
animationsWithDestroyedFrame(mRestyleManager);
// Create a ReframingStyleContexts struct on the stack and put it in our
// mReframingStyleContexts for almost all of the remaining scope of
// this function.
//
// It needs to be *in* scope during BeginProcessingRestyles, which
// might (if mDoRebuildAllStyleData is true) do substantial amounts of
// restyle processing.
//
// However, it needs to be *out* of scope during
// EndProcessingRestyles, since we should release the style contexts
// it holds prior to any EndReconstruct call that
// EndProcessingRestyles makes. This is because in EndReconstruct we
// try to destroy the old rule tree using the GC mechanism, which
// means it only gets destroyed if it's unreferenced (and if it's
// referenced, we assert). So we want the ReframingStyleContexts
// (which holds old style contexts) to be destroyed before the
// EndReconstruct so those style contexts go away before
// EndReconstruct.
{
RestyleManager::ReframingStyleContexts
reframingStyleContexts(mRestyleManager);
mRestyleManager->BeginProcessingRestyles(*this);
LOG_RESTYLE("Processing %d pending %srestyles with %d restyle roots for %s",
mPendingRestyles.Count(),
mRestyleManager->PresContext()->TransitionManager()->
InAnimationOnlyStyleUpdate()
? (const char*) "animation " : (const char*) "",
static_cast<int>(mRestyleRoots.Length()),
GetDocumentURI(Document()).get());
LOG_RESTYLE_INDENT();
// loop so that we process any restyle events generated by processing
while (mPendingRestyles.Count()) {
if (mHaveLaterSiblingRestyles) {
// Convert them to individual restyles on all the later siblings
AutoTArray<RefPtr<Element>, RESTYLE_ARRAY_STACKSIZE> laterSiblingArr;
for (auto iter = mPendingRestyles.Iter(); !iter.Done(); iter.Next()) {
auto element = static_cast<dom::Element*>(iter.Key());
MOZ_ASSERT(!element->IsStyledByServo(), "Should not have Servo-styled elements here");
// Only collect the entries that actually need restyling by us (and
// haven't, for example, already been restyled).
// It's important to not mess with the flags on entries not in our
// document.
if (element->GetComposedDoc() == Document() &&
element->HasFlag(RestyleBit()) &&
(iter.Data()->mRestyleHint & eRestyle_LaterSiblings)) {
laterSiblingArr.AppendElement(element);
}
}
for (uint32_t i = 0; i < laterSiblingArr.Length(); ++i) {
Element* element = laterSiblingArr[i];
MOZ_ASSERT(!element->IsStyledByServo());
for (nsIContent* sibling = element->GetNextSibling();
sibling;
sibling = sibling->GetNextSibling()) {
if (sibling->IsElement()) {
LOG_RESTYLE("adding pending restyle for %s due to "
"eRestyle_LaterSiblings hint on %s",
FrameTagToString(sibling->AsElement()).get(),
FrameTagToString(element->AsElement()).get());
if (AddPendingRestyle(sibling->AsElement(), eRestyle_Subtree,
nsChangeHint(0))) {
// Nothing else to do here; we'll handle the following
// siblings when we get to |sibling| in laterSiblingArr.
break;
}
}
}
}
// Now remove all those eRestyle_LaterSiblings bits
for (uint32_t i = 0; i < laterSiblingArr.Length(); ++i) {
Element* element = laterSiblingArr[i];
NS_ASSERTION(element->HasFlag(RestyleBit()), "How did that happen?");
RestyleData* data;
#ifdef DEBUG
bool found =
#endif
mPendingRestyles.Get(element, &data);
NS_ASSERTION(found, "Where did our entry go?");
data->mRestyleHint =
nsRestyleHint(data->mRestyleHint & ~eRestyle_LaterSiblings);
}
LOG_RESTYLE("%d pending restyles after expanding out "
"eRestyle_LaterSiblings", mPendingRestyles.Count());
mHaveLaterSiblingRestyles = false;
}
uint32_t rootCount;
while ((rootCount = mRestyleRoots.Length())) {
// Make sure to pop the element off our restyle root array, so
// that we can freely append to the array as we process this
// element.
RefPtr<Element> element;
element.swap(mRestyleRoots[rootCount - 1]);
mRestyleRoots.RemoveElementAt(rootCount - 1);
LOG_RESTYLE("processing style root %s at index %d",
FrameTagToString(element).get(), rootCount - 1);
LOG_RESTYLE_INDENT();
// Do the document check before calling GetRestyleData, since we
// don't want to do the sibling-processing GetRestyleData does if
// the node is no longer relevant.
if (element->GetComposedDoc() != Document()) {
// Content node has been removed from our document; nothing else
// to do here
LOG_RESTYLE("skipping, no longer in the document");
continue;
}
nsAutoPtr<RestyleData> data;
if (!GetRestyleData(element, data)) {
LOG_RESTYLE("skipping, already restyled");
continue;
}
if (isTimelineRecording) {
timelines->AddMarkerForDocShell(docShell, Move(
MakeUnique<RestyleTimelineMarker>(
data->mRestyleHint, MarkerTracingType::START)));
}
#if defined(MOZ_ENABLE_PROFILER_SPS)
Maybe<GeckoProfilerTracingRAII> profilerRAII;
if (profiler_feature_active("restyle")) {
profilerRAII.emplace("Paint", "Styles", Move(data->mBacktrace));
}
#endif
ProcessOneRestyle(element, data->mRestyleHint, data->mChangeHint,
data->mRestyleHintData);
AddRestyleRootsIfAwaitingRestyle(data->mDescendants);
if (isTimelineRecording) {
timelines->AddMarkerForDocShell(docShell, Move(
MakeUnique<RestyleTimelineMarker>(
data->mRestyleHint, MarkerTracingType::END)));
}
}
if (mHaveLaterSiblingRestyles) {
// Keep processing restyles for now
continue;
}
// Now we only have entries with change hints left. To be safe in
// case of reentry from the handing of the change hint, use a
// scratch array instead of calling out to ProcessOneRestyle while
// enumerating the hashtable. Use the stack if we can, otherwise
// fall back on heap-allocation.
AutoTArray<RestyleEnumerateData, RESTYLE_ARRAY_STACKSIZE> restyleArr;
RestyleEnumerateData* restylesToProcess =
restyleArr.AppendElements(mPendingRestyles.Count());
if (restylesToProcess) {
RestyleEnumerateData* restyle = restylesToProcess;
#ifdef RESTYLE_LOGGING
uint32_t count = 0;
#endif
for (auto iter = mPendingRestyles.Iter(); !iter.Done(); iter.Next()) {
auto element = static_cast<dom::Element*>(iter.Key());
RestyleTracker::RestyleData* data = iter.Data();
// Only collect the entries that actually need restyling by us (and
// haven't, for example, already been restyled).
// It's important to not mess with the flags on entries not in our
// document.
if (element->GetComposedDoc() != Document() ||
!element->HasFlag(RestyleBit())) {
LOG_RESTYLE("skipping pending restyle %s, already restyled or no "
"longer in the document",
FrameTagToString(element).get());
continue;
}
NS_ASSERTION(
!element->HasFlag(RootBit()) ||
// Maybe we're just not reachable via the frame tree?
(element->GetFlattenedTreeParent() &&
(!element->GetFlattenedTreeParent()->GetPrimaryFrame() ||
element->GetFlattenedTreeParent()->GetPrimaryFrame()->IsLeaf() ||
element->GetComposedDoc()->GetShell()->FrameManager()
->GetDisplayContentsStyleFor(element))) ||
// Or not reachable due to an async reinsert we have
// pending? If so, we'll have a reframe hint around.
// That incidentally makes it safe that we still have
// the bit, since any descendants that didn't get added
// to the roots list because we had the bits will be
// completely restyled in a moment.
(data->mChangeHint & nsChangeHint_ReconstructFrame),
"Why did this not get handled while processing mRestyleRoots?");
// Unset the restyle bits now, so if they get readded later as we
// process we won't clobber that adding of the bit.
element->UnsetFlags(RestyleBit() |
RootBit() |
ConditionalDescendantsBit());
restyle->mElement = element;
restyle->mRestyleHint = data->mRestyleHint;
restyle->mChangeHint = data->mChangeHint;
// We can move data since we'll be clearing mPendingRestyles after
// we finish enumerating it.
restyle->mRestyleHintData = Move(data->mRestyleHintData);
#if defined(MOZ_ENABLE_PROFILER_SPS)
restyle->mBacktrace = Move(data->mBacktrace);
#endif
#ifdef RESTYLE_LOGGING
count++;
#endif
// Increment to the next slot in the array
restyle++;
}
RestyleEnumerateData* lastRestyle = restyle;
// Clear the hashtable now that we don't need it anymore
mPendingRestyles.Clear();
#ifdef RESTYLE_LOGGING
uint32_t index = 0;
#endif
for (RestyleEnumerateData* currentRestyle = restylesToProcess;
currentRestyle != lastRestyle;
++currentRestyle) {
LOG_RESTYLE("processing pending restyle %s at index %d/%d",
FrameTagToString(currentRestyle->mElement).get(),
index++, count);
LOG_RESTYLE_INDENT();
#if defined(MOZ_ENABLE_PROFILER_SPS)
Maybe<GeckoProfilerTracingRAII> profilerRAII;
if (profiler_feature_active("restyle")) {
profilerRAII.emplace("Paint", "Styles", Move(currentRestyle->mBacktrace));
}
#endif
if (isTimelineRecording) {
timelines->AddMarkerForDocShell(docShell, Move(
MakeUnique<RestyleTimelineMarker>(
currentRestyle->mRestyleHint, MarkerTracingType::START)));
}
ProcessOneRestyle(currentRestyle->mElement,
currentRestyle->mRestyleHint,
currentRestyle->mChangeHint,
currentRestyle->mRestyleHintData);
if (isTimelineRecording) {
timelines->AddMarkerForDocShell(docShell, Move(
MakeUnique<RestyleTimelineMarker>(
currentRestyle->mRestyleHint, MarkerTracingType::END)));
}
}
}
}
}
// mPendingRestyles is now empty.
mHaveSelectors = false;
mRestyleManager->EndProcessingRestyles();
}
void HTMLLinkElement::OnDNSPrefetchDeferred() {
UnsetFlags(HTML_LINK_DNS_PREFETCH_REQUESTED);
SetFlags(HTML_LINK_DNS_PREFETCH_DEFERRED);
}
void
HTMLAnchorElement::OnDNSPrefetchDeferred()
{
UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
SetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
}
nsresult CharacterData::BindToTree(Document* aDocument, nsIContent* aParent,
nsIContent* aBindingParent) {
MOZ_ASSERT(aParent || aDocument, "Must have document if no parent!");
MOZ_ASSERT(NODE_FROM(aParent, aDocument)->OwnerDoc() == OwnerDoc(),
"Must have the same owner document");
MOZ_ASSERT(!aParent || aDocument == aParent->GetUncomposedDoc(),
"aDocument must be current doc of aParent");
MOZ_ASSERT(!GetUncomposedDoc() && !IsInUncomposedDoc(),
"Already have a document. Unbind first!");
MOZ_ASSERT(!IsInComposedDoc(), "Already have a document. Unbind first!");
// Note that as we recurse into the kids, they'll have a non-null parent. So
// only assert if our parent is _changing_ while we have a parent.
MOZ_ASSERT(!GetParent() || aParent == GetParent(),
"Already have a parent. Unbind first!");
MOZ_ASSERT(!GetBindingParent() || aBindingParent == GetBindingParent() ||
(!aBindingParent && aParent &&
aParent->GetBindingParent() == GetBindingParent()),
"Already have a binding parent. Unbind first!");
MOZ_ASSERT(aBindingParent != this,
"Content must not be its own binding parent");
MOZ_ASSERT(!IsRootOfNativeAnonymousSubtree() || aBindingParent == aParent,
"Native anonymous content must have its parent as its "
"own binding parent");
if (!aBindingParent && aParent) {
aBindingParent = aParent->GetBindingParent();
}
// First set the binding parent
if (aBindingParent) {
NS_ASSERTION(IsRootOfNativeAnonymousSubtree() ||
!HasFlag(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE) ||
(aParent && aParent->IsInNativeAnonymousSubtree()),
"Trying to re-bind content from native anonymous subtree to "
"non-native anonymous parent!");
ExtendedContentSlots()->mBindingParent =
aBindingParent; // Weak, so no addref happens.
if (aParent->IsInNativeAnonymousSubtree()) {
SetFlags(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE);
}
if (aParent->HasFlag(NODE_HAS_BEEN_IN_UA_WIDGET)) {
SetFlags(NODE_HAS_BEEN_IN_UA_WIDGET);
}
if (HasFlag(NODE_IS_ANONYMOUS_ROOT)) {
aParent->SetMayHaveAnonymousChildren();
}
}
if (aParent && aParent->IsInShadowTree()) {
ClearSubtreeRootPointer();
SetFlags(NODE_IS_IN_SHADOW_TREE);
SetIsConnected(aParent->IsInComposedDoc());
MOZ_ASSERT(aParent->GetContainingShadow());
ExtendedContentSlots()->mContainingShadow = aParent->GetContainingShadow();
}
bool hadParent = !!GetParentNode();
// Set parent
if (aParent) {
if (!GetParent()) {
NS_ADDREF(aParent);
}
mParent = aParent;
} else {
mParent = aDocument;
}
SetParentIsContent(aParent);
// XXXbz sXBL/XBL2 issue!
// Set document
if (aDocument) {
// We no longer need to track the subtree pointer (and in fact we'll assert
// if we do this any later).
ClearSubtreeRootPointer();
// XXX See the comment in Element::BindToTree
SetIsInDocument();
SetIsConnected(true);
if (mText.IsBidi()) {
aDocument->SetBidiEnabled();
}
// Clear the lazy frame construction bits.
UnsetFlags(NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES);
} else if (!IsInShadowTree()) {
// If we're not in the doc and not in a shadow tree,
// update our subtree pointer.
SetSubtreeRootPointer(aParent->SubtreeRoot());
}
nsNodeUtils::ParentChainChanged(this);
if (!hadParent && IsRootOfNativeAnonymousSubtree()) {
nsNodeUtils::NativeAnonymousChildListChange(this, false);
}
UpdateEditableState(false);
MOZ_ASSERT(aDocument == GetUncomposedDoc(), "Bound to wrong document");
MOZ_ASSERT(aParent == GetParent(), "Bound to wrong parent");
MOZ_ASSERT(aBindingParent == GetBindingParent(),
"Bound to wrong binding parent");
return NS_OK;
}
nsresult CharacterData::SetTextInternal(
uint32_t aOffset, uint32_t aCount, const char16_t* aBuffer,
uint32_t aLength, bool aNotify,
CharacterDataChangeInfo::Details* aDetails) {
MOZ_ASSERT(aBuffer || !aLength, "Null buffer passed to SetTextInternal!");
// sanitize arguments
uint32_t textLength = mText.GetLength();
if (aOffset > textLength) {
return NS_ERROR_DOM_INDEX_SIZE_ERR;
}
if (aCount > textLength - aOffset) {
aCount = textLength - aOffset;
}
uint32_t endOffset = aOffset + aCount;
// Make sure the text fragment can hold the new data.
if (aLength > aCount && !mText.CanGrowBy(aLength - aCount)) {
return NS_ERROR_OUT_OF_MEMORY;
}
Document* document = GetComposedDoc();
mozAutoDocUpdate updateBatch(document, aNotify);
bool haveMutationListeners =
aNotify && nsContentUtils::HasMutationListeners(
this, NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED, this);
RefPtr<nsAtom> oldValue;
if (haveMutationListeners) {
oldValue = GetCurrentValueAtom();
}
if (aNotify) {
CharacterDataChangeInfo info = {aOffset == textLength, aOffset, endOffset,
aLength, aDetails};
nsNodeUtils::CharacterDataWillChange(this, info);
}
Directionality oldDir = eDir_NotSet;
bool dirAffectsAncestor =
(NodeType() == TEXT_NODE &&
TextNodeWillChangeDirection(static_cast<nsTextNode*>(this), &oldDir,
aOffset));
if (aOffset == 0 && endOffset == textLength) {
// Replacing whole text or old text was empty. Don't bother to check for
// bidi in this string if the document already has bidi enabled.
// If this is marked as "maybe modified frequently", the text should be
// stored as char16_t since converting char* to char16_t* is expensive.
bool ok =
mText.SetTo(aBuffer, aLength, !document || !document->GetBidiEnabled(),
HasFlag(NS_MAYBE_MODIFIED_FREQUENTLY));
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
} else if (aOffset == textLength) {
// Appending to existing
bool ok =
mText.Append(aBuffer, aLength, !document || !document->GetBidiEnabled(),
HasFlag(NS_MAYBE_MODIFIED_FREQUENTLY));
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
} else {
// Merging old and new
bool bidi = mText.IsBidi();
// Allocate new buffer
int32_t newLength = textLength - aCount + aLength;
// Use nsString and not nsAutoString so that we get a nsStringBuffer which
// can be just AddRefed in nsTextFragment.
nsString to;
to.SetCapacity(newLength);
// Copy over appropriate data
if (aOffset) {
mText.AppendTo(to, 0, aOffset);
}
if (aLength) {
to.Append(aBuffer, aLength);
if (!bidi && (!document || !document->GetBidiEnabled())) {
bidi = HasRTLChars(MakeSpan(aBuffer, aLength));
}
}
if (endOffset != textLength) {
mText.AppendTo(to, endOffset, textLength - endOffset);
}
// If this is marked as "maybe modified frequently", the text should be
// stored as char16_t since converting char* to char16_t* is expensive.
// Use char16_t also when we have bidi characters.
bool use2b = HasFlag(NS_MAYBE_MODIFIED_FREQUENTLY) || bidi;
bool ok = mText.SetTo(to, false, use2b);
mText.SetBidi(bidi);
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
}
UnsetFlags(NS_CACHED_TEXT_IS_ONLY_WHITESPACE);
if (document && mText.IsBidi()) {
// If we found bidi characters in mText.SetTo() above, indicate that the
// document contains bidi characters.
document->SetBidiEnabled();
}
if (dirAffectsAncestor) {
// dirAffectsAncestor being true implies that we have a text node, see
// above.
MOZ_ASSERT(NodeType() == TEXT_NODE);
TextNodeChangedDirection(static_cast<nsTextNode*>(this), oldDir, aNotify);
}
// Notify observers
if (aNotify) {
CharacterDataChangeInfo info = {aOffset == textLength, aOffset, endOffset,
aLength, aDetails};
nsNodeUtils::CharacterDataChanged(this, info);
if (haveMutationListeners) {
InternalMutationEvent mutation(true, eLegacyCharacterDataModified);
mutation.mPrevAttrValue = oldValue;
if (aLength > 0) {
nsAutoString val;
mText.AppendTo(val);
mutation.mNewAttrValue = NS_Atomize(val);
}
mozAutoSubtreeModified subtree(OwnerDoc(), this);
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
}
}
return NS_OK;
}
