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fune/dom/base/nsGenericDOMDataNode.cpp
Nicholas Nethercote b71747b2ac Bug 1299727 - Rename NS_WARN_IF_FALSE as NS_WARNING_ASSERTION. r=erahm. 
The new name makes the sense of the condition much clearer. E.g. compare:

  NS_WARN_IF_FALSE(!rv.Failed());

with:

  NS_WARNING_ASSERTION(!rv.Failed());

The new name also makes it clearer that it only has effect in debug builds,
because that's standard for assertions.

--HG--
extra : rebase_source : 886e57a9e433e0cb6ed635cc075b34b7ebf81853
2016-09-01 15:01:16 +10:00

1148 lines
31 KiB
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Base class for DOM Core's nsIDOMComment, nsIDOMDocumentType, nsIDOMText,
* nsIDOMCDATASection, 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/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 "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() == nsIDOMNode::TEXT_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::CDATA_SECTION_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::COMMENT_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::PROCESSING_INSTRUCTION_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::DOCUMENT_TYPE_NODE,
"Bad NodeType in aNodeInfo");
}
nsGenericDOMDataNode::nsGenericDOMDataNode(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: nsIContent(aNodeInfo)
{
MOZ_ASSERT(mNodeInfo->NodeType() == nsIDOMNode::TEXT_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::CDATA_SECTION_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::COMMENT_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::PROCESSING_INSTRUCTION_NODE ||
mNodeInfo->NodeType() == nsIDOMNode::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())
}
// 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;
}
nsDataSlots *slots = tmp->GetExistingDataSlots();
if (slots) {
slots->Traverse(cb);
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsGenericDOMDataNode)
nsINode::Unlink(tmp);
// Clear flag here because unlinking slots will clear the
// containing shadow root pointer.
tmp->UnsetFlags(NODE_IS_IN_SHADOW_TREE);
nsDataSlots *slots = tmp->GetExistingDataSlots();
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_CYCLE_COLLECTING_ADDREF(nsGenericDOMDataNode)
NS_IMPL_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.Assign(mText.Get2b(), mText.GetLength());
} 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);
}
}
NS_IMETHODIMP
nsGenericDOMDataNode::MozRemove()
{
Remove();
return NS_OK;
}
//----------------------------------------------------------------------
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);
nsCOMPtr<nsIAtom> 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() == nsIDOMNode::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.
bool ok = mText.SetTo(aBuffer, aLength, !document || !document->GetBidiEnabled());
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());
NS_ENSURE_TRUE(ok, NS_ERROR_OUT_OF_MEMORY);
}
else {
// Merging old and new
// Allocate new buffer
int32_t newLength = textLength - aCount + aLength;
char16_t* to = new char16_t[newLength];
// Copy over appropriate data
if (aOffset) {
mText.CopyTo(to, 0, aOffset);
}
if (aLength) {
memcpy(to + aOffset, aBuffer, aLength * sizeof(char16_t));
}
if (endOffset != textLength) {
mText.CopyTo(to + aOffset + aLength, endOffset, textLength - endOffset);
}
bool ok = mText.SetTo(to, newLength, !document || !document->GetBidiEnabled());
delete [] to;
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() == nsIDOMNode::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("&amp;");
} else if (ch == '<') {
aBuf.AppendLiteral("&lt;");
} else if (ch == '>') {
aBuf.AppendLiteral("&gt;");
} 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("&amp;");
} else if (ch == '<') {
aBuf.AppendLiteral("&lt;");
} else if (ch == '>') {
aBuf.AppendLiteral("&gt;");
} 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!");
DataSlots()->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 (aParent->IsInShadowTree()) {
ClearSubtreeRootPointer();
SetFlags(NODE_IS_IN_SHADOW_TREE);
}
ShadowRoot* parentContainingShadow = aParent->GetContainingShadow();
if (parentContainingShadow) {
DataSlots()->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);
// It would be cleanest to mark nodes as dirty when (a) they're created and
// (b) they're unbound from a tree. However, we can't easily do (a) right now,
// because IsStyledByServo() is not always easy to check at node creation time,
// and the bits have different meaning in the non-IsStyledByServo case.
//
// So for now, we just mark nodes as dirty when they're inserted into a
// document or shadow tree.
if (IsStyledByServo() && IsInComposedDoc()) {
MOZ_ASSERT(!ServoData().get());
SetIsDirtyForServo();
}
NS_POSTCONDITION(aDocument == GetUncomposedDoc(), "Bound to wrong document");
NS_POSTCONDITION(aParent == GetParent(), "Bound to wrong parent");
NS_POSTCONDITION(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();
// Computed styled data isn't useful for detached nodes, and we'll need to
// recomputed it anyway if we ever insert the nodes back into a document.
if (IsStyledByServo()) {
ServoData().reset();
} else {
#ifdef MOZ_STYLO
MOZ_ASSERT(!ServoData());
#endif
}
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));
}
}
nsDataSlots *slots = GetExistingDataSlots();
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;
}
nsresult
nsGenericDOMDataNode::SetAttr(int32_t aNameSpaceID, nsIAtom* aAttr,
nsIAtom* aPrefix, const nsAString& aValue,
bool aNotify)
{
return NS_OK;
}
nsresult
nsGenericDOMDataNode::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttr,
bool aNotify)
{
return NS_OK;
}
const nsAttrName*
nsGenericDOMDataNode::GetAttrNameAt(uint32_t aIndex) const
{
return nullptr;
}
BorrowedAttrInfo
nsGenericDOMDataNode::GetAttrInfoAt(uint32_t aIndex) const
{
return BorrowedAttrInfo(nullptr, nullptr);
}
uint32_t
nsGenericDOMDataNode::GetAttrCount() const
{
return 0;
}
uint32_t
nsGenericDOMDataNode::GetChildCount() const
{
return 0;
}
nsIContent *
nsGenericDOMDataNode::GetChildAt(uint32_t aIndex) const
{
return nullptr;
}
nsIContent * const *
nsGenericDOMDataNode::GetChildArray(uint32_t* aChildCount) const
{
*aChildCount = 0;
return nullptr;
}
int32_t
nsGenericDOMDataNode::IndexOf(const nsINode* aPossibleChild) const
{
return -1;
}
nsresult
nsGenericDOMDataNode::InsertChildAt(nsIContent* aKid, uint32_t aIndex,
bool aNotify)
{
return NS_OK;
}
void
nsGenericDOMDataNode::RemoveChildAt(uint32_t aIndex, bool aNotify)
{
}
nsIContent *
nsGenericDOMDataNode::GetBindingParent() const
{
nsDataSlots *slots = GetExistingDataSlots();
return slots ? slots->mBindingParent : nullptr;
}
ShadowRoot *
nsGenericDOMDataNode::GetContainingShadow() const
{
nsDataSlots *slots = GetExistingDataSlots();
if (!slots) {
return nullptr;
}
return slots->mContainingShadow;
}
void
nsGenericDOMDataNode::SetShadowRoot(ShadowRoot* aShadowRoot)
{
}
nsTArray<nsIContent*>&
nsGenericDOMDataNode::DestInsertionPoints()
{
nsDataSlots *slots = DataSlots();
return slots->mDestInsertionPoints;
}
nsTArray<nsIContent*>*
nsGenericDOMDataNode::GetExistingDestInsertionPoints() const
{
nsDataSlots *slots = GetExistingDataSlots();
if (slots) {
return &slots->mDestInsertionPoints;
}
return nullptr;
}
nsXBLBinding *
nsGenericDOMDataNode::GetXBLBinding() const
{
return nullptr;
}
void
nsGenericDOMDataNode::SetXBLBinding(nsXBLBinding* aBinding,
nsBindingManager* aOldBindingManager)
{
}
nsIContent *
nsGenericDOMDataNode::GetXBLInsertionParent() const
{
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsDataSlots *slots = GetExistingDataSlots();
if (slots) {
return slots->mXBLInsertionParent;
}
}
return nullptr;
}
void
nsGenericDOMDataNode::SetXBLInsertionParent(nsIContent* aContent)
{
if (aContent) {
nsDataSlots *slots = DataSlots();
SetFlags(NODE_MAY_BE_IN_BINDING_MNGR);
slots->mXBLInsertionParent = aContent;
} else {
nsDataSlots *slots = GetExistingDataSlots();
if (slots) {
slots->mXBLInsertionParent = nullptr;
}
}
}
CustomElementData *
nsGenericDOMDataNode::GetCustomElementData() const
{
return nullptr;
}
void
nsGenericDOMDataNode::SetCustomElementData(CustomElementData* aData)
{
}
bool
nsGenericDOMDataNode::IsNodeOfType(uint32_t aFlags) const
{
return !(aFlags & ~(eCONTENT | 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;
}
nsINode::nsSlots*
nsGenericDOMDataNode::CreateSlots()
{
return new nsDataSlots();
}
nsGenericDOMDataNode::nsDataSlots::nsDataSlots()
: nsINode::nsSlots(), mBindingParent(nullptr)
{
}
void
nsGenericDOMDataNode::nsDataSlots::Traverse(nsCycleCollectionTraversalCallback &cb)
{
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mXBLInsertionParent");
cb.NoteXPCOMChild(mXBLInsertionParent.get());
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mSlots->mContainingShadow");
cb.NoteXPCOMChild(NS_ISUPPORTS_CAST(nsIContent*, mContainingShadow));
}
void
nsGenericDOMDataNode::nsDataSlots::Unlink()
{
mXBLInsertionParent = nullptr;
mContainingShadow = nullptr;
}
//----------------------------------------------------------------------
// 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;
}
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) {
int32_t insertionIndex = parent->IndexOf(this);
if (aCloneAfterOriginal) {
++insertionIndex;
}
parent->InsertChildAt(newContent, insertionIndex, 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 */ int32_t
nsGenericDOMDataNode::FirstLogicallyAdjacentTextNode(nsIContent* aParent,
int32_t aIndex)
{
while (aIndex-- > 0) {
nsIContent* sibling = aParent->GetChildAt(aIndex);
if (!sibling->IsNodeOfType(nsINode::eTEXT))
return aIndex + 1;
}
return 0;
}
/* static */ int32_t
nsGenericDOMDataNode::LastLogicallyAdjacentTextNode(nsIContent* aParent,
int32_t aIndex,
uint32_t aCount)
{
while (++aIndex < int32_t(aCount)) {
nsIContent* sibling = aParent->GetChildAt(aIndex);
if (!sibling->IsNodeOfType(nsINode::eTEXT))
return aIndex - 1;
}
return aCount - 1;
}
nsresult
nsGenericDOMDataNode::GetWholeText(nsAString& aWholeText)
{
nsIContent* parent = GetParent();
// Handle parent-less nodes
if (!parent)
return GetData(aWholeText);
int32_t index = parent->IndexOf(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);
int32_t first =
FirstLogicallyAdjacentTextNode(parent, index);
int32_t last =
LastLogicallyAdjacentTextNode(parent, index, parent->GetChildCount());
aWholeText.Truncate();
nsCOMPtr<nsIDOMText> node;
nsAutoString tmp;
do {
node = do_QueryInterface(parent->GetChildAt(first));
node->GetData(tmp);
aWholeText.Append(tmp);
} while (first++ < last);
return NS_OK;
}
//----------------------------------------------------------------------
// Implementation of the nsIContent interface text functions
const nsTextFragment *
nsGenericDOMDataNode::GetText()
{
return &mText;
}
uint32_t
nsGenericDOMDataNode::TextLength() const
{
return mText.GetLength();
}
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()
{
// 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.
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;
if (!dom::IsSpaceCharacter(ch)) {
UnsetFlags(NS_TEXT_IS_ONLY_WHITESPACE);
SetFlags(NS_CACHED_TEXT_IS_ONLY_WHITESPACE);
return false;
}
++cp;
}
SetFlags(NS_CACHED_TEXT_IS_ONLY_WHITESPACE | NS_TEXT_IS_ONLY_WHITESPACE);
return true;
}
bool
nsGenericDOMDataNode::HasTextForTranslation()
{
if (NodeType() != nsIDOMNode::TEXT_NODE &&
NodeType() != nsIDOMNode::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<nsIAtom>
nsGenericDOMDataNode::GetCurrentValueAtom()
{
nsAutoString val;
GetData(val);
return NS_Atomize(val);
}
NS_IMETHODIMP
nsGenericDOMDataNode::WalkContentStyleRules(nsRuleWalker* aRuleWalker)
{
return NS_OK;
}
NS_IMETHODIMP_(bool)
nsGenericDOMDataNode::IsAttributeMapped(const nsIAtom* aAttribute) const
{
return false;
}
nsChangeHint
nsGenericDOMDataNode::GetAttributeChangeHint(const nsIAtom* aAttribute,
int32_t aModType) const
{
NS_NOTREACHED("Shouldn't be calling this!");
return nsChangeHint(0);
}
size_t
nsGenericDOMDataNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = nsIContent::SizeOfExcludingThis(aMallocSizeOf);
n += mText.SizeOfExcludingThis(aMallocSizeOf);
return n;
}
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