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-rw-r--r--editor/libeditor/SplitNodeTransaction.cpp241
1 files changed, 241 insertions, 0 deletions
diff --git a/editor/libeditor/SplitNodeTransaction.cpp b/editor/libeditor/SplitNodeTransaction.cpp
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+++ b/editor/libeditor/SplitNodeTransaction.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "SplitNodeTransaction.h"
+
+#include "EditorDOMPoint.h" // for EditorRawDOMPoint
+#include "HTMLEditHelpers.h" // for SplitNodeResult
+#include "HTMLEditor.h" // for HTMLEditor
+#include "HTMLEditorInlines.h"
+#include "HTMLEditUtils.h"
+#include "JoinSplitNodeDirection.h" // for SplitNodeDirection
+#include "SelectionState.h" // for AutoTrackDOMPoint and RangeUpdater
+
+#include "mozilla/Logging.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/ToString.h"
+#include "nsAString.h"
+#include "nsDebug.h" // for NS_ASSERTION, etc.
+#include "nsError.h" // for NS_ERROR_NOT_INITIALIZED, etc.
+#include "nsIContent.h" // for nsIContent
+
+namespace mozilla {
+
+using namespace dom;
+
+template already_AddRefed<SplitNodeTransaction> SplitNodeTransaction::Create(
+ HTMLEditor& aHTMLEditor, const EditorDOMPoint& aStartOfRightContent);
+template already_AddRefed<SplitNodeTransaction> SplitNodeTransaction::Create(
+ HTMLEditor& aHTMLEditor, const EditorRawDOMPoint& aStartOfRightContent);
+
+// static
+template <typename PT, typename CT>
+already_AddRefed<SplitNodeTransaction> SplitNodeTransaction::Create(
+ HTMLEditor& aHTMLEditor,
+ const EditorDOMPointBase<PT, CT>& aStartOfRightContent) {
+ RefPtr<SplitNodeTransaction> transaction =
+ new SplitNodeTransaction(aHTMLEditor, aStartOfRightContent);
+ return transaction.forget();
+}
+
+template <typename PT, typename CT>
+SplitNodeTransaction::SplitNodeTransaction(
+ HTMLEditor& aHTMLEditor,
+ const EditorDOMPointBase<PT, CT>& aStartOfRightContent)
+ : mHTMLEditor(&aHTMLEditor),
+ mSplitContent(aStartOfRightContent.template GetContainerAs<nsIContent>()),
+ mSplitOffset(aStartOfRightContent.Offset()) {
+ // printf("SplitNodeTransaction size: %zu\n", sizeof(SplitNodeTransaction));
+ static_assert(sizeof(SplitNodeTransaction) <= 64,
+ "Transaction classes may be created a lot and may be alive "
+ "long so that keep the foot print smaller as far as possible");
+ MOZ_DIAGNOSTIC_ASSERT(aStartOfRightContent.IsInContentNode());
+ MOZ_DIAGNOSTIC_ASSERT(HTMLEditUtils::IsSplittableNode(
+ *aStartOfRightContent.template ContainerAs<nsIContent>()));
+}
+
+std::ostream& operator<<(std::ostream& aStream,
+ const SplitNodeTransaction& aTransaction) {
+ aStream << "{ mParentNode=" << aTransaction.mParentNode.get();
+ if (aTransaction.mParentNode) {
+ aStream << " (" << *aTransaction.mParentNode << ")";
+ }
+ aStream << ", mNewContent=" << aTransaction.mNewContent.get();
+ if (aTransaction.mNewContent) {
+ aStream << " (" << *aTransaction.mNewContent << ")";
+ }
+ aStream << ", mSplitContent=" << aTransaction.mSplitContent.get();
+ if (aTransaction.mSplitContent) {
+ aStream << " (" << *aTransaction.mSplitContent << ")";
+ }
+ aStream << ", mSplitOffset=" << aTransaction.mSplitOffset
+ << ", mHTMLEditor=" << aTransaction.mHTMLEditor.get()
+ << ", GetSplitNodeDirection()="
+ << aTransaction.GetSplitNodeDirection() << " }";
+ return aStream;
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(SplitNodeTransaction, EditTransactionBase,
+ mHTMLEditor, mParentNode, mSplitContent,
+ mNewContent)
+
+NS_IMPL_ADDREF_INHERITED(SplitNodeTransaction, EditTransactionBase)
+NS_IMPL_RELEASE_INHERITED(SplitNodeTransaction, EditTransactionBase)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SplitNodeTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+
+SplitNodeDirection SplitNodeTransaction::GetSplitNodeDirection() const {
+ return MOZ_LIKELY(mHTMLEditor) ? mHTMLEditor->GetSplitNodeDirection()
+ : SplitNodeDirection::LeftNodeIsNewOne;
+}
+
+JoinNodesDirection SplitNodeTransaction::GetJoinNodesDirection() const {
+ return MOZ_LIKELY(mHTMLEditor) ? mHTMLEditor->GetJoinNodesDirection()
+ : JoinNodesDirection::LeftNodeIntoRightNode;
+}
+
+NS_IMETHODIMP SplitNodeTransaction::DoTransaction() {
+ MOZ_LOG(GetLogModule(), LogLevel::Info,
+ ("%p SplitNodeTransaction::%s this=%s", this, __FUNCTION__,
+ ToString(*this).c_str()));
+
+ if (MOZ_UNLIKELY(NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mSplitContent))) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+ MOZ_ASSERT(mSplitOffset <= mSplitContent->Length());
+
+ // Create a new node
+ IgnoredErrorResult error;
+ // Don't use .downcast directly because AsContent has an assertion we want
+ nsCOMPtr<nsINode> newNode = mSplitContent->CloneNode(false, error);
+ if (MOZ_UNLIKELY(error.Failed())) {
+ NS_WARNING("nsINode::CloneNode() failed");
+ return error.StealNSResult();
+ }
+ if (MOZ_UNLIKELY(NS_WARN_IF(!newNode))) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mNewContent = newNode->AsContent();
+ mParentNode = mSplitContent->GetParentNode();
+ if (!mParentNode) {
+ NS_WARNING("The splitting content was an orphan node");
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
+ const OwningNonNull<nsIContent> splittingContent = *mSplitContent;
+ // MOZ_KnownLive(*mNewContent): it's grabbed by newNode
+ Result<SplitNodeResult, nsresult> splitNodeResult = DoTransactionInternal(
+ htmlEditor, splittingContent, MOZ_KnownLive(*mNewContent), mSplitOffset);
+ if (MOZ_UNLIKELY(splitNodeResult.isErr())) {
+ NS_WARNING("SplitNodeTransaction::DoTransactionInternal() failed");
+ return EditorBase::ToGenericNSResult(splitNodeResult.unwrapErr());
+ }
+ // The user should handle selection rather here.
+ splitNodeResult.inspect().IgnoreCaretPointSuggestion();
+ return NS_OK;
+}
+
+Result<SplitNodeResult, nsresult> SplitNodeTransaction::DoTransactionInternal(
+ HTMLEditor& aHTMLEditor, nsIContent& aSplittingContent,
+ nsIContent& aNewContent, uint32_t aSplitOffset) {
+ if (Element* const splittingElement = Element::FromNode(aSplittingContent)) {
+ // MOZ_KnownLive(*splittingElement): aSplittingContent should be grabbed by
+ // the callers.
+ nsresult rv =
+ aHTMLEditor.MarkElementDirty(MOZ_KnownLive(*splittingElement));
+ if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
+ return Err(NS_ERROR_EDITOR_DESTROYED);
+ }
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+ "EditorBase::MarkElementDirty() failed, but ignored");
+ }
+
+ Result<SplitNodeResult, nsresult> splitNodeResult = aHTMLEditor.DoSplitNode(
+ EditorDOMPoint(&aSplittingContent,
+ std::min(aSplitOffset, aSplittingContent.Length())),
+ aNewContent, GetSplitNodeDirection());
+ if (MOZ_UNLIKELY(splitNodeResult.isErr())) {
+ NS_WARNING("HTMLEditor::DoSplitNode() failed");
+ return splitNodeResult;
+ }
+ // When adding caret suggestion to SplitNodeResult, here didn't change
+ // selection so that just ignore it.
+ splitNodeResult.inspect().IgnoreCaretPointSuggestion();
+ return splitNodeResult;
+}
+
+NS_IMETHODIMP SplitNodeTransaction::UndoTransaction() {
+ MOZ_LOG(GetLogModule(), LogLevel::Info,
+ ("%p SplitNodeTransaction::%s this=%s", this, __FUNCTION__,
+ ToString(*this).c_str()));
+
+ if (MOZ_UNLIKELY(NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mNewContent) ||
+ NS_WARN_IF(!mParentNode) || NS_WARN_IF(!mSplitContent) ||
+ NS_WARN_IF(mNewContent->IsBeingRemoved()))) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ // This assumes Do inserted the new node in front of the prior existing node
+ const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
+ const OwningNonNull<nsIContent> keepingContent = *mSplitContent;
+ const OwningNonNull<nsIContent> removingContent = *mNewContent;
+ nsresult rv;
+ EditorDOMPoint joinedPoint;
+ {
+ // Unfortunately, we cannot track joining point if moving right node content
+ // into left node since it cannot track changes from web apps and HTMLEditor
+ // never removes the content of the left node. So it should be true that
+ // we don't need to track the point in the direction.
+ Maybe<AutoTrackDOMPoint> trackJoinedPoint;
+ if (GetJoinNodesDirection() == JoinNodesDirection::LeftNodeIntoRightNode) {
+ joinedPoint.Set(keepingContent, 0u);
+ trackJoinedPoint.emplace(htmlEditor->RangeUpdaterRef(), &joinedPoint);
+ }
+ rv = htmlEditor->DoJoinNodes(keepingContent, removingContent,
+ GetJoinNodesDirection());
+ }
+ if (NS_SUCCEEDED(rv)) {
+ // Adjust split offset for redo here
+ if (joinedPoint.IsSet()) {
+ mSplitOffset = joinedPoint.Offset();
+ }
+ } else {
+ NS_WARNING("HTMLEditor::DoJoinNodes() failed");
+ }
+ return rv;
+}
+
+/* Redo cannot simply resplit the right node, because subsequent transactions
+ * on the redo stack may depend on the left node existing in its previous
+ * state.
+ */
+NS_IMETHODIMP SplitNodeTransaction::RedoTransaction() {
+ MOZ_LOG(GetLogModule(), LogLevel::Info,
+ ("%p SplitNodeTransaction::%s this=%s", this, __FUNCTION__,
+ ToString(*this).c_str()));
+
+ if (MOZ_UNLIKELY(NS_WARN_IF(!mNewContent) || NS_WARN_IF(!mParentNode) ||
+ NS_WARN_IF(!mSplitContent) || NS_WARN_IF(!mHTMLEditor))) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
+ const OwningNonNull<nsIContent> newContent = *mNewContent;
+ const OwningNonNull<nsIContent> splittingContent = *mSplitContent;
+ Result<SplitNodeResult, nsresult> splitNodeResult = DoTransactionInternal(
+ htmlEditor, splittingContent, newContent, mSplitOffset);
+ if (MOZ_UNLIKELY(splitNodeResult.isErr())) {
+ NS_WARNING("SplitNodeTransaction::DoTransactionInternal() failed");
+ return EditorBase::ToGenericNSResult(splitNodeResult.unwrapErr());
+ }
+ // When adding caret suggestion to SplitNodeResult, here didn't change
+ // selection so that just ignore it.
+ splitNodeResult.inspect().IgnoreCaretPointSuggestion();
+ return NS_OK;
+}
+
+} // namespace mozilla