/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Base class for DOM Core's nsIDOMComment, nsIDOMDocumentType, nsIDOMText,
* CDATASection and nsIDOMProcessingInstruction nodes.
*/
#include "mozilla/DebugOnly.h"
#include "nsGenericDOMDataNode.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/dom/ShadowRoot.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsReadableUtils.h"
#include "mozilla/InternalMutationEvent.h"
#include "nsIURI.h"
#include "nsIDOMEvent.h"
#include "nsIDOMText.h"
#include "nsCOMPtr.h"
#include "nsDOMString.h"
#include "nsChangeHint.h"
#include "nsCOMArray.h"
#include "nsNodeUtils.h"
#include "mozilla/dom/DirectionalityUtils.h"
#include "nsBindingManager.h"
#include "nsCCUncollectableMarker.h"
#include "mozAutoDocUpdate.h"
#include "nsTextNode.h"
#include "nsBidiUtils.h"
#include "PLDHashTable.h"
#include "mozilla/Sprintf.h"
#include "nsWrapperCacheInlines.h"
using namespace mozilla;
using namespace mozilla::dom;
nsGenericDOMDataNode::nsGenericDOMDataNode(
already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsIContent(aNodeInfo) {
MOZ_ASSERT(mNodeInfo->NodeType() == TEXT_NODE ||
mNodeInfo->NodeType() == CDATA_SECTION_NODE ||
mNodeInfo->NodeType() == COMMENT_NODE ||
mNodeInfo->NodeType() == PROCESSING_INSTRUCTION_NODE ||
mNodeInfo->NodeType() == DOCUMENT_TYPE_NODE,
"Bad NodeType in aNodeInfo");
}
nsGenericDOMDataNode::nsGenericDOMDataNode(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: nsIContent(aNodeInfo) {
MOZ_ASSERT(mNodeInfo->NodeType() == TEXT_NODE ||
mNodeInfo->NodeType() == CDATA_SECTION_NODE ||
mNodeInfo->NodeType() == COMMENT_NODE ||
mNodeInfo->NodeType() == PROCESSING_INSTRUCTION_NODE ||
mNodeInfo->NodeType() == DOCUMENT_TYPE_NODE,
"Bad NodeType in aNodeInfo");
}
nsGenericDOMDataNode::~nsGenericDOMDataNode() {
NS_PRECONDITION(!IsInUncomposedDoc(),
"Please remove this from the document properly");
if (GetParent()) {
NS_RELEASE(mParent);
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsGenericDOMDataNode)
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(nsGenericDOMDataNode)
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsGenericDOMDataNode)
return Element::CanSkip(tmp, aRemovingAllowed);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsGenericDOMDataNode)
return Element::CanSkipInCC(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsGenericDOMDataNode)
return Element::CanSkipThis(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsGenericDOMDataNode)
if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
char name[40];
SprintfLiteral(name, "nsGenericDOMDataNode (len=%d)",
tmp->mText.GetLength());
cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
} else {
NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsGenericDOMDataNode, tmp->mRefCnt.get())
}
if (!nsIContent::Traverse(tmp, cb)) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsGenericDOMDataNode)
nsIContent::Unlink(tmp);
// Clear flag here because unlinking slots will clear the
// containing shadow root pointer.
tmp->UnsetFlags(NODE_IS_IN_SHADOW_TREE);
nsContentSlots* slots = tmp->GetExistingContentSlots();
if (slots) {
slots->Unlink();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN(nsGenericDOMDataNode)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(nsGenericDOMDataNode)
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))
// DOM bindings depend on the identity pointer being the
// same as nsINode (which nsIContent inherits).
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContent)
NS_INTERFACE_MAP_END
NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_ADDREF(nsGenericDOMDataNode)
NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(
nsGenericDOMDataNode, nsNodeUtils::LastRelease(this))
void nsGenericDOMDataNode::GetNodeValueInternal(nsAString& aNodeValue) {
DebugOnly<nsresult> rv = GetData(aNodeValue);
NS_ASSERTION(NS_SUCCEEDED(rv), "GetData() failed!");
}
void nsGenericDOMDataNode::SetNodeValueInternal(const nsAString& aNodeValue,
ErrorResult& aError) {
aError = SetTextInternal(0, mText.GetLength(), aNodeValue.BeginReading(),
aNodeValue.Length(), true);
}
//----------------------------------------------------------------------
// Implementation of nsIDOMCharacterData
nsresult nsGenericDOMDataNode::GetData(nsAString& aData) const {
if (mText.Is2b()) {
aData.Truncate();
mText.AppendTo(aData);
} else {
// Must use Substring() since nsDependentCString() requires null
// terminated strings.
const char* data = mText.Get1b();
if (data) {
CopyASCIItoUTF16(Substring(data, data + mText.GetLength()), aData);
} else {
aData.Truncate();
}
}
return NS_OK;
}
nsresult nsGenericDOMDataNode::SetData(const nsAString& aData) {
return SetTextInternal(0, mText.GetLength(), aData.BeginReading(),
aData.Length(), true);
}
nsresult nsGenericDOMDataNode::GetLength(uint32_t* aLength) {
*aLength = mText.GetLength();
return NS_OK;
}
nsresult nsGenericDOMDataNode::SubstringData(uint32_t aStart, uint32_t aCount,
nsAString& aReturn) {
ErrorResult rv;
SubstringData(aStart, aCount, aReturn, rv);
return rv.StealNSResult();
}
void nsGenericDOMDataNode::SubstringData(uint32_t aStart, uint32_t aCount,
nsAString& aReturn, ErrorResult& rv) {
aReturn.Truncate();
uint32_t textLength = mText.GetLength();
if (aStart > textLength) {
rv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
return;
}
uint32_t amount = aCount;
if (amount > textLength - aStart) {
amount = textLength - aStart;
}
if (mText.Is2b()) {
aReturn.Assign(mText.Get2b() + aStart, amount);
} else {
// Must use Substring() since nsDependentCString() requires null
// terminated strings.
const char* data = mText.Get1b() + aStart;
CopyASCIItoUTF16(Substring(data, data + amount), aReturn);
}
}
//----------------------------------------------------------------------
nsresult nsGenericDOMDataNode::AppendData(const nsAString& aData) {
return SetTextInternal(mText.GetLength(), 0, aData.BeginReading(),
aData.Length(), true);
}
nsresult nsGenericDOMDataNode::InsertData(uint32_t aOffset,
const nsAString& aData) {
return SetTextInternal(aOffset, 0, aData.BeginReading(), aData.Length(),
true);
}
nsresult nsGenericDOMDataNode::DeleteData(uint32_t aOffset, uint32_t aCount) {
return SetTextInternal(aOffset, aCount, nullptr, 0, true);
}
nsresult nsGenericDOMDataNode::ReplaceData(uint32_t aOffset, uint32_t aCount,
const nsAString& aData) {
return SetTextInternal(aOffset, aCount, aData.BeginReading(), aData.Length(),
true);
}
nsresult nsGenericDOMDataNode::SetTextInternal(
uint32_t aOffset, uint32_t aCount, const char16_t* aBuffer,
uint32_t aLength, bool aNotify,
CharacterDataChangeInfo::Details* aDetails) {
NS_PRECONDITION(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;
}
nsIDocument* document = GetComposedDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, 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(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;
}
//----------------------------------------------------------------------
// Implementation of nsIContent
#ifdef DEBUG
void nsGenericDOMDataNode::ToCString(nsAString& aBuf, int32_t aOffset,
int32_t aLen) const {
if (mText.Is2b()) {
const char16_t* cp = mText.Get2b() + aOffset;
const char16_t* end = cp + aLen;
while (cp < end) {
char16_t ch = *cp++;
if (ch == '&') {
aBuf.AppendLiteral("&");
} else if (ch == '<') {
aBuf.AppendLiteral("<");
} else if (ch == '>') {
aBuf.AppendLiteral(">");
} else if ((ch < ' ') || (ch >= 127)) {
char buf[10];
SprintfLiteral(buf, "\\u%04x", ch);
AppendASCIItoUTF16(buf, aBuf);
} else {
aBuf.Append(ch);
}
}
} else {
unsigned char* cp = (unsigned char*)mText.Get1b() + aOffset;
const unsigned char* end = cp + aLen;
while (cp < end) {
char16_t ch = *cp++;
if (ch == '&') {
aBuf.AppendLiteral("&");
} else if (ch == '<') {
aBuf.AppendLiteral("<");
} else if (ch == '>') {
aBuf.AppendLiteral(">");
} else if ((ch < ' ') || (ch >= 127)) {
char buf[10];
SprintfLiteral(buf, "\\u%04x", ch);
AppendASCIItoUTF16(buf, aBuf);
} else {
aBuf.Append(ch);
}
}
}
}
#endif
nsresult nsGenericDOMDataNode::BindToTree(nsIDocument* aDocument,
nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers) {
NS_PRECONDITION(aParent || aDocument, "Must have document if no parent!");
NS_PRECONDITION(NODE_FROM(aParent, aDocument)->OwnerDoc() == OwnerDoc(),
"Must have the same owner document");
NS_PRECONDITION(!aParent || aDocument == aParent->GetUncomposedDoc(),
"aDocument must be current doc of aParent");
NS_PRECONDITION(!GetUncomposedDoc() && !IsInUncomposedDoc(),
"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.
NS_PRECONDITION(!GetParent() || aParent == GetParent(),
"Already have a parent. Unbind first!");
NS_PRECONDITION(!GetBindingParent() || aBindingParent == GetBindingParent() ||
(!aBindingParent && aParent &&
aParent->GetBindingParent() == GetBindingParent()),
"Already have a binding parent. Unbind first!");
NS_PRECONDITION(aBindingParent != this,
"Content must not be its own binding parent");
NS_PRECONDITION(
!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_CHROME_ONLY_ACCESS)) {
SetFlags(NODE_CHROME_ONLY_ACCESS);
}
if (HasFlag(NODE_IS_ANONYMOUS_ROOT)) {
aParent->SetMayHaveAnonymousChildren();
}
if (aParent->IsInShadowTree()) {
ClearSubtreeRootPointer();
SetFlags(NODE_IS_IN_SHADOW_TREE);
}
ShadowRoot* parentContainingShadow = aParent->GetContainingShadow();
if (parentContainingShadow) {
ExtendedContentSlots()->mContainingShadow = parentContainingShadow;
}
}
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();
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;
}
void nsGenericDOMDataNode::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 =
HasFlag(NODE_FORCE_XBL_BINDINGS) ? OwnerDoc() : 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);
}
already_AddRefed<nsINodeList> nsGenericDOMDataNode::GetChildren(
uint32_t aFilter) {
return nullptr;
}
uint32_t nsGenericDOMDataNode::GetChildCount() const { return 0; }
nsIContent* nsGenericDOMDataNode::GetChildAt_Deprecated(uint32_t aIndex) const {
return nullptr;
}
int32_t nsGenericDOMDataNode::ComputeIndexOf(
const nsINode* aPossibleChild) const {
return -1;
}
nsresult nsGenericDOMDataNode::InsertChildBefore(nsIContent* aKid,
nsIContent* aBeforeThis,
bool aNotify) {
return NS_OK;
}
nsresult nsGenericDOMDataNode::InsertChildAt_Deprecated(nsIContent* aKid,
uint32_t aIndex,
bool aNotify) {
return NS_OK;
}
void nsGenericDOMDataNode::RemoveChildAt_Deprecated(uint32_t aIndex,
bool aNotify) {}
void nsGenericDOMDataNode::RemoveChildNode(nsIContent* aKid, bool aNotify) {}
nsXBLBinding* nsGenericDOMDataNode::DoGetXBLBinding() const { return nullptr; }
bool nsGenericDOMDataNode::IsNodeOfType(uint32_t aFlags) const {
return !(aFlags & ~eDATA_NODE);
}
void nsGenericDOMDataNode::SaveSubtreeState() {}
#ifdef DEBUG
void nsGenericDOMDataNode::List(FILE* out, int32_t aIndent) const {}
void nsGenericDOMDataNode::DumpContent(FILE* out, int32_t aIndent,
bool aDumpAll) const {}
#endif
bool nsGenericDOMDataNode::IsLink(nsIURI** aURI) const {
*aURI = nullptr;
return false;
}
//----------------------------------------------------------------------
// Implementation of the nsIDOMText interface
nsresult nsGenericDOMDataNode::SplitData(uint32_t aOffset, nsIContent** aReturn,
bool aCloneAfterOriginal) {
*aReturn = nullptr;
nsresult rv = NS_OK;
nsAutoString cutText;
uint32_t length = TextLength();
if (aOffset > length) {
return NS_ERROR_DOM_INDEX_SIZE_ERR;
}
uint32_t cutStartOffset = aCloneAfterOriginal ? aOffset : 0;
uint32_t cutLength = aCloneAfterOriginal ? length - aOffset : aOffset;
rv = SubstringData(cutStartOffset, cutLength, cutText);
if (NS_FAILED(rv)) {
return rv;
}
nsIDocument* document = GetComposedDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, true);
// Use Clone for creating the new node so that the new node is of same class
// as this node!
nsCOMPtr<nsIContent> newContent = CloneDataNode(mNodeInfo, false);
if (!newContent) {
return NS_ERROR_OUT_OF_MEMORY;
}
// nsRange expects the CharacterDataChanged notification is followed
// by an insertion of |newContent|. If you change this code,
// make sure you make the appropriate changes in nsRange.
newContent->SetText(cutText, true); // XXX should be false?
CharacterDataChangeInfo::Details details = {
CharacterDataChangeInfo::Details::eSplit, newContent};
rv = SetTextInternal(cutStartOffset, cutLength, nullptr, 0, true,
aCloneAfterOriginal ? &details : nullptr);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsINode> parent = GetParentNode();
if (parent) {
nsCOMPtr<nsIContent> beforeNode = this;
if (aCloneAfterOriginal) {
beforeNode = beforeNode->GetNextSibling();
}
parent->InsertChildBefore(newContent, beforeNode, true);
}
newContent.swap(*aReturn);
return rv;
}
nsresult nsGenericDOMDataNode::SplitText(uint32_t aOffset,
nsIDOMText** aReturn) {
nsCOMPtr<nsIContent> newChild;
nsresult rv = SplitData(aOffset, getter_AddRefs(newChild));
if (NS_SUCCEEDED(rv)) {
rv = CallQueryInterface(newChild, aReturn);
}
return rv;
}
static nsIContent* FirstLogicallyAdjacentTextNode(nsIContent* aNode) {
nsCOMPtr<nsIContent> parent = aNode->GetParent();
while (aNode) {
nsIContent* sibling = aNode->GetPreviousSibling();
if (!sibling || !sibling->IsNodeOfType(nsINode::eTEXT)) {
return aNode;
}
aNode = sibling;
}
return parent->GetFirstChild();
}
static nsIContent* LastLogicallyAdjacentTextNode(nsIContent* aNode) {
nsCOMPtr<nsIContent> parent = aNode->GetParent();
while (aNode) {
nsIContent* sibling = aNode->GetNextSibling();
if (!sibling) break;
if (!sibling->IsNodeOfType(nsINode::eTEXT)) {
return aNode;
}
aNode = sibling;
}
return parent->GetLastChild();
}
nsresult nsGenericDOMDataNode::GetWholeText(nsAString& aWholeText) {
nsIContent* parent = GetParent();
// Handle parent-less nodes
if (!parent) return GetData(aWholeText);
int32_t index = parent->ComputeIndexOf(this);
NS_WARNING_ASSERTION(index >= 0,
"Trying to use .wholeText with an anonymous"
"text node child of a binding parent?");
NS_ENSURE_TRUE(index >= 0, NS_ERROR_DOM_NOT_SUPPORTED_ERR);
nsCOMPtr<nsIContent> first = FirstLogicallyAdjacentTextNode(this);
nsCOMPtr<nsIContent> last = LastLogicallyAdjacentTextNode(this);
aWholeText.Truncate();
nsCOMPtr<nsIDOMText> node;
nsAutoString tmp;
while (true) {
node = do_QueryInterface(first);
node->GetData(tmp);
aWholeText.Append(tmp);
if (first == last) {
break;
}
first = first->GetNextSibling();
}
return NS_OK;
}
//----------------------------------------------------------------------
// Implementation of the nsIContent interface text functions
const nsTextFragment* nsGenericDOMDataNode::GetText() { return &mText; }
uint32_t nsGenericDOMDataNode::TextLength() const { return TextDataLength(); }
nsresult nsGenericDOMDataNode::SetText(const char16_t* aBuffer,
uint32_t aLength, bool aNotify) {
return SetTextInternal(0, mText.GetLength(), aBuffer, aLength, aNotify);
}
nsresult nsGenericDOMDataNode::AppendText(const char16_t* aBuffer,
uint32_t aLength, bool aNotify) {
return SetTextInternal(mText.GetLength(), 0, aBuffer, aLength, aNotify);
}
bool nsGenericDOMDataNode::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;
}
bool nsGenericDOMDataNode::ThreadSafeTextIsOnlyWhitespace() const {
// FIXME: should this method take content language into account?
if (mText.Is2b()) {
// The fragment contains non-8bit characters and such characters
// are never considered whitespace.
//
// FIXME(emilio): This is not quite true in presence of the
// NS_MAYBE_MODIFIED_FREQUENTLY flag... But looks like we only set that on
// anonymous nodes, so should be fine...
return false;
}
if (HasFlag(NS_CACHED_TEXT_IS_ONLY_WHITESPACE)) {
return HasFlag(NS_TEXT_IS_ONLY_WHITESPACE);
}
const char* cp = mText.Get1b();
const char* end = cp + mText.GetLength();
while (cp < end) {
char ch = *cp;
// NOTE(emilio): If you ever change the definition of "whitespace" here, you
// need to change it too in RestyleManager::CharacterDataChanged.
if (!dom::IsSpaceCharacter(ch)) {
return false;
}
++cp;
}
return true;
}
bool nsGenericDOMDataNode::HasTextForTranslation() {
if (NodeType() != TEXT_NODE && NodeType() != CDATA_SECTION_NODE) {
return false;
}
if (mText.Is2b()) {
// The fragment contains non-8bit characters which means there
// was at least one "interesting" character to trigger non-8bit.
return true;
}
if (HasFlag(NS_CACHED_TEXT_IS_ONLY_WHITESPACE) &&
HasFlag(NS_TEXT_IS_ONLY_WHITESPACE)) {
return false;
}
const char* cp = mText.Get1b();
const char* end = cp + mText.GetLength();
unsigned char ch;
for (; cp < end; cp++) {
ch = *cp;
// These are the characters that are letters
// in the first 256 UTF-8 codepoints.
if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
(ch >= 192 && ch <= 214) || (ch >= 216 && ch <= 246) || (ch >= 248)) {
return true;
}
}
return false;
}
void nsGenericDOMDataNode::AppendTextTo(nsAString& aResult) {
mText.AppendTo(aResult);
}
bool nsGenericDOMDataNode::AppendTextTo(nsAString& aResult,
const mozilla::fallible_t& aFallible) {
return mText.AppendTo(aResult, aFallible);
}
already_AddRefed<nsAtom> nsGenericDOMDataNode::GetCurrentValueAtom() {
nsAutoString val;
GetData(val);
return NS_Atomize(val);
}
void nsGenericDOMDataNode::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
size_t* aNodeSize) const {
nsIContent::AddSizeOfExcludingThis(aSizes, aNodeSize);
*aNodeSize += mText.SizeOfExcludingThis(aSizes.mState.mMallocSizeOf);
}