зеркало из https://github.com/mozilla/gecko-dev.git
213 строки
8.5 KiB
C++
213 строки
8.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "JoinNodesTransaction.h"
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#include "EditorDOMPoint.h" // for EditorDOMPoint, etc.
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#include "HTMLEditHelpers.h" // for SplitNodeResult
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#include "JoinSplitNodeDirection.h" // JoinNodesDirection
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#include "HTMLEditor.h" // for HTMLEditor
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#include "HTMLEditorInlines.h"
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#include "HTMLEditUtils.h"
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#include "mozilla/Logging.h"
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#include "mozilla/ToString.h"
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#include "mozilla/dom/Text.h"
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#include "nsAString.h"
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#include "nsDebug.h" // for NS_ASSERTION, etc.
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#include "nsError.h" // for NS_ERROR_NULL_POINTER, etc.
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#include "nsIContent.h" // for nsIContent
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#include "nsISupportsImpl.h" // for QueryInterface, etc.
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namespace mozilla {
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using namespace dom;
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// static
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already_AddRefed<JoinNodesTransaction> JoinNodesTransaction::MaybeCreate(
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HTMLEditor& aHTMLEditor, nsIContent& aLeftContent,
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nsIContent& aRightContent) {
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RefPtr<JoinNodesTransaction> transaction =
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new JoinNodesTransaction(aHTMLEditor, aLeftContent, aRightContent);
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if (NS_WARN_IF(!transaction->CanDoIt())) {
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return nullptr;
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}
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return transaction.forget();
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}
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JoinNodesTransaction::JoinNodesTransaction(HTMLEditor& aHTMLEditor,
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nsIContent& aLeftContent,
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nsIContent& aRightContent)
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: mHTMLEditor(&aHTMLEditor),
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mRemovedContent(aHTMLEditor.GetJoinNodesDirection() ==
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JoinNodesDirection::LeftNodeIntoRightNode
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? &aLeftContent
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: &aRightContent),
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mKeepingContent(aHTMLEditor.GetJoinNodesDirection() ==
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JoinNodesDirection::LeftNodeIntoRightNode
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? &aRightContent
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: &aLeftContent) {
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// printf("JoinNodesTransaction size: %zu\n", sizeof(JoinNodesTransaction));
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static_assert(sizeof(JoinNodesTransaction) <= 64,
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"Transaction classes may be created a lot and may be alive "
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"long so that keep the foot print smaller as far as possible");
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}
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std::ostream& operator<<(std::ostream& aStream,
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const JoinNodesTransaction& aTransaction) {
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aStream << "{ mParentNode=" << aTransaction.mParentNode.get();
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if (aTransaction.mParentNode) {
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aStream << " (" << *aTransaction.mParentNode << ")";
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}
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aStream << ", mRemovedContent=" << aTransaction.mRemovedContent.get();
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if (aTransaction.mRemovedContent) {
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aStream << " (" << *aTransaction.mRemovedContent << ")";
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}
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aStream << ", mKeepingContent=" << aTransaction.mKeepingContent.get();
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if (aTransaction.mKeepingContent) {
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aStream << " (" << *aTransaction.mKeepingContent << ")";
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}
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aStream << ", mJoinedOffset=" << aTransaction.mJoinedOffset
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<< ", mHTMLEditor=" << aTransaction.mHTMLEditor.get()
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<< ", GetJoinNodesDirection()="
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<< aTransaction.GetJoinNodesDirection() << " }";
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return aStream;
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(JoinNodesTransaction, EditTransactionBase,
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mHTMLEditor, mParentNode, mRemovedContent,
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mKeepingContent)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JoinNodesTransaction)
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NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
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SplitNodeDirection JoinNodesTransaction::GetSplitNodeDirection() const {
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return MOZ_LIKELY(mHTMLEditor) ? mHTMLEditor->GetSplitNodeDirection()
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: SplitNodeDirection::LeftNodeIsNewOne;
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}
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JoinNodesDirection JoinNodesTransaction::GetJoinNodesDirection() const {
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return MOZ_LIKELY(mHTMLEditor) ? mHTMLEditor->GetJoinNodesDirection()
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: JoinNodesDirection::LeftNodeIntoRightNode;
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}
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bool JoinNodesTransaction::CanDoIt() const {
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if (NS_WARN_IF(!mKeepingContent) || NS_WARN_IF(!mRemovedContent) ||
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NS_WARN_IF(!mHTMLEditor) ||
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NS_WARN_IF(mRemovedContent->IsBeingRemoved()) ||
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!mKeepingContent->IsInComposedDoc()) {
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return false;
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}
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return HTMLEditUtils::IsRemovableFromParentNode(*mRemovedContent);
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}
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// After DoTransaction() and RedoTransaction(), the left node is removed from
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// the content tree and right node remains.
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NS_IMETHODIMP JoinNodesTransaction::DoTransaction() {
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MOZ_LOG(GetLogModule(), LogLevel::Info,
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("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
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ToString(*this).c_str()));
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return DoTransactionInternal(RedoingTransaction::No);
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}
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nsresult JoinNodesTransaction::DoTransactionInternal(
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RedoingTransaction aRedoingTransaction) {
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if (MOZ_UNLIKELY(NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mKeepingContent) ||
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NS_WARN_IF(!mRemovedContent) ||
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NS_WARN_IF(mRemovedContent->IsBeingRemoved()))) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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nsINode* removingContentParentNode = mRemovedContent->GetParentNode();
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if (MOZ_UNLIKELY(NS_WARN_IF(!removingContentParentNode))) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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// Verify that the joining content nodes have the same parent
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if (MOZ_UNLIKELY(removingContentParentNode !=
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mKeepingContent->GetParentNode())) {
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NS_ASSERTION(false, "Nodes do not have same parent");
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return NS_ERROR_NOT_AVAILABLE;
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}
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// Set this instance's mParentNode. Other methods will see a non-null
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// mParentNode and know all is well
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mParentNode = removingContentParentNode;
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// For now, setting mJoinedOffset to removed content length so that
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// CreateJoinedPoint returns a point in mKeepingContent whose offset is
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// the result if all content in mRemovedContent are moved to start or end of
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// mKeepingContent without any intervation. The offset will be adjusted
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// below.
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mJoinedOffset =
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GetJoinNodesDirection() == JoinNodesDirection::LeftNodeIntoRightNode
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? mRemovedContent->Length()
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: mKeepingContent->Length();
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const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
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const OwningNonNull<nsIContent> removingContent = *mRemovedContent;
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const OwningNonNull<nsIContent> keepingContent = *mKeepingContent;
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nsresult rv;
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// Let's try to get actual joined point with the tacker.
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EditorDOMPoint joinNodesPoint =
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GetJoinNodesDirection() == JoinNodesDirection::LeftNodeIntoRightNode
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? EditorDOMPoint(keepingContent, 0u)
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: EditorDOMPoint::AtEndOf(keepingContent);
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{
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AutoTrackDOMPoint trackJoinNodePoint(htmlEditor->RangeUpdaterRef(),
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&joinNodesPoint);
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rv = htmlEditor->DoJoinNodes(keepingContent, removingContent,
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GetJoinNodesDirection());
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NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::DoJoinNodes() failed");
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}
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// Adjust join node offset to the actual offset where the original first
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// content of the right node is.
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mJoinedOffset = joinNodesPoint.Offset();
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if (aRedoingTransaction == RedoingTransaction::No) {
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htmlEditor->DidJoinNodesTransaction(*this, rv);
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}
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return rv;
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}
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// XXX: What if instead of split, we just deleted the unneeded children of
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// mRight and re-inserted mLeft?
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NS_IMETHODIMP JoinNodesTransaction::UndoTransaction() {
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MOZ_LOG(GetLogModule(), LogLevel::Info,
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("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
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ToString(*this).c_str()));
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if (NS_WARN_IF(!mParentNode) || NS_WARN_IF(!mKeepingContent) ||
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NS_WARN_IF(!mRemovedContent) || NS_WARN_IF(!mHTMLEditor)) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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const OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
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const OwningNonNull<nsIContent> removedContent = *mRemovedContent;
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Result<SplitNodeResult, nsresult> splitNodeResult =
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htmlEditor->DoSplitNode(CreateJoinedPoint<EditorDOMPoint>(),
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removedContent, GetSplitNodeDirection());
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if (MOZ_UNLIKELY(splitNodeResult.isErr())) {
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NS_WARNING("HTMLEditor::DoSplitNode() failed");
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return splitNodeResult.unwrapErr();
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}
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// When adding caret suggestion to SplitNodeResult, here didn't change
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// selection so that just ignore it.
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splitNodeResult.inspect().IgnoreCaretPointSuggestion();
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return NS_OK;
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}
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NS_IMETHODIMP JoinNodesTransaction::RedoTransaction() {
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MOZ_LOG(GetLogModule(), LogLevel::Info,
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("%p JoinNodesTransaction::%s this=%s", this, __FUNCTION__,
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ToString(*this).c_str()));
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return DoTransactionInternal(RedoingTransaction::Yes);
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}
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} // namespace mozilla
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