/* -*- 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()) } 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("&"); } 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!"); 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(!HasServoData()); 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()) { ClearServoData(); } else { #ifdef MOZ_STYLO MOZ_ASSERT(!HasServoData()); #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; }