Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 300 insertions, 0 deletions

diff --git a/editor/libeditor/MoveNodeTransaction.cpp b/editor/libeditor/MoveNodeTransaction.cpp
new file mode 100644
index 0000000000..a64e5d5ec0
--- /dev/null
+++ b/editor/libeditor/MoveNodeTransaction.cpp
@@ -0,0 +1,300 @@
+/* -*- 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 "MoveNodeTransaction.h"
+
+#include "EditorBase.h"      // for EditorBase
+#include "EditorDOMPoint.h"  // for EditorDOMPoint
+#include "HTMLEditor.h"      // for HTMLEditor
+#include "HTMLEditUtils.h"   // for HTMLEditUtils
+
+#include "mozilla/Likely.h"
+#include "mozilla/Logging.h"
+#include "mozilla/ToString.h"
+
+#include "nsDebug.h"     // for NS_WARNING, etc.
+#include "nsError.h"     // for NS_ERROR_NULL_POINTER, etc.
+#include "nsIContent.h"  // for nsIContent
+#include "nsString.h"    // for nsString
+
+namespace mozilla {
+
+using namespace dom;
+
+template already_AddRefed<MoveNodeTransaction> MoveNodeTransaction::MaybeCreate(
+    HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
+    const EditorDOMPoint& aPointToInsert);
+template already_AddRefed<MoveNodeTransaction> MoveNodeTransaction::MaybeCreate(
+    HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
+    const EditorRawDOMPoint& aPointToInsert);
+
+// static
+template <typename PT, typename CT>
+already_AddRefed<MoveNodeTransaction> MoveNodeTransaction::MaybeCreate(
+    HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
+    const EditorDOMPointBase<PT, CT>& aPointToInsert) {
+  if (NS_WARN_IF(!aContentToMove.GetParentNode()) ||
+      NS_WARN_IF(!aPointToInsert.IsSet())) {
+    return nullptr;
+  }
+  // TODO: We should not allow to move a node to improper container element.
+  //       However, this is currently used to move invalid parent while
+  //       processing the nodes.  Therefore, treating the case as error breaks
+  //       a lot.
+  if (NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(aContentToMove)) ||
+      // The destination should be editable, but it may be in an orphan node or
+      // sub-tree to reduce number of DOM mutation events.  In such case, we're
+      // okay to move a node into the non-editable content because we can assume
+      // that the caller will insert it into an editable element.
+      NS_WARN_IF(!HTMLEditUtils::IsSimplyEditableNode(
+                     *aPointToInsert.GetContainer()) &&
+                 aPointToInsert.GetContainer()->IsInComposedDoc())) {
+    return nullptr;
+  }
+  RefPtr<MoveNodeTransaction> transaction =
+      new MoveNodeTransaction(aHTMLEditor, aContentToMove, aPointToInsert);
+  return transaction.forget();
+}
+
+template <typename PT, typename CT>
+MoveNodeTransaction::MoveNodeTransaction(
+    HTMLEditor& aHTMLEditor, nsIContent& aContentToMove,
+    const EditorDOMPointBase<PT, CT>& aPointToInsert)
+    : mContentToMove(&aContentToMove),
+      mContainer(aPointToInsert.GetContainer()),
+      mReference(aPointToInsert.GetChild()),
+      mOldContainer(aContentToMove.GetParentNode()),
+      mOldNextSibling(aContentToMove.GetNextSibling()),
+      mHTMLEditor(&aHTMLEditor) {
+  MOZ_ASSERT(mContainer);
+  MOZ_ASSERT(mOldContainer);
+  MOZ_ASSERT_IF(mReference, mReference->GetParentNode() == mContainer);
+  MOZ_ASSERT_IF(mOldNextSibling,
+                mOldNextSibling->GetParentNode() == mOldContainer);
+  // printf("MoveNodeTransaction size: %zu\n", sizeof(MoveNodeTransaction));
+  static_assert(sizeof(MoveNodeTransaction) <= 72,
+                "Transaction classes may be created a lot and may be alive "
+                "long so that keep the foot print smaller as far as possible");
+}
+
+std::ostream& operator<<(std::ostream& aStream,
+                         const MoveNodeTransaction& aTransaction) {
+  auto DumpNodeDetails = [&](const nsINode* aNode) {
+    if (aNode) {
+      if (aNode->IsText()) {
+        nsAutoString data;
+        aNode->AsText()->GetData(data);
+        aStream << " (#text \"" << NS_ConvertUTF16toUTF8(data).get() << "\")";
+      } else {
+        aStream << " (" << *aNode << ")";
+      }
+    }
+  };
+  aStream << "{ mContentToMove=" << aTransaction.mContentToMove.get();
+  DumpNodeDetails(aTransaction.mContentToMove);
+  aStream << ", mContainer=" << aTransaction.mContainer.get();
+  DumpNodeDetails(aTransaction.mContainer);
+  aStream << ", mReference=" << aTransaction.mReference.get();
+  DumpNodeDetails(aTransaction.mReference);
+  aStream << ", mOldContainer=" << aTransaction.mOldContainer.get();
+  DumpNodeDetails(aTransaction.mOldContainer);
+  aStream << ", mOldNextSibling=" << aTransaction.mOldNextSibling.get();
+  DumpNodeDetails(aTransaction.mOldNextSibling);
+  aStream << ", mHTMLEditor=" << aTransaction.mHTMLEditor.get() << " }";
+  return aStream;
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(MoveNodeTransaction, EditTransactionBase,
+                                   mHTMLEditor, mContentToMove, mContainer,
+                                   mReference, mOldContainer, mOldNextSibling)
+
+NS_IMPL_ADDREF_INHERITED(MoveNodeTransaction, EditTransactionBase)
+NS_IMPL_RELEASE_INHERITED(MoveNodeTransaction, EditTransactionBase)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MoveNodeTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+
+NS_IMETHODIMP MoveNodeTransaction::DoTransaction() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p MoveNodeTransaction::%s this=%s", this, __FUNCTION__,
+           ToString(*this).c_str()));
+  return DoTransactionInternal();
+}
+
+nsresult MoveNodeTransaction::DoTransactionInternal() {
+  MOZ_DIAGNOSTIC_ASSERT(mHTMLEditor);
+  MOZ_DIAGNOSTIC_ASSERT(mContentToMove);
+  MOZ_DIAGNOSTIC_ASSERT(mContainer);
+  MOZ_DIAGNOSTIC_ASSERT(mOldContainer);
+
+  OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
+  OwningNonNull<nsIContent> contentToMove = *mContentToMove;
+  OwningNonNull<nsINode> container = *mContainer;
+  nsCOMPtr<nsIContent> newNextSibling = mReference;
+  if (contentToMove->IsElement()) {
+    nsresult rv = htmlEditor->MarkElementDirty(
+        MOZ_KnownLive(*contentToMove->AsElement()));
+    if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
+      return EditorBase::ToGenericNSResult(rv);
+    }
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "EditorBase::MarkElementDirty() failed, but ignored");
+  }
+
+  {
+    AutoMoveNodeSelNotify notifyStoredRanges(
+        htmlEditor->RangeUpdaterRef(), EditorRawDOMPoint(contentToMove),
+        newNextSibling ? EditorRawDOMPoint(newNextSibling)
+                       : EditorRawDOMPoint::AtEndOf(container));
+    IgnoredErrorResult error;
+    container->InsertBefore(contentToMove, newNextSibling, error);
+    // InsertBefore() may call MightThrowJSException() even if there is no
+    // error. We don't need the flag here.
+    error.WouldReportJSException();
+    if (error.Failed()) {
+      NS_WARNING("nsINode::InsertBefore() failed");
+      return error.StealNSResult();
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP MoveNodeTransaction::UndoTransaction() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p MoveNodeTransaction::%s this=%s", this, __FUNCTION__,
+           ToString(*this).c_str()));
+
+  if (NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mContentToMove) ||
+      NS_WARN_IF(!mOldContainer)) {
+    // Perhaps, nulled-out by the cycle collector.
+    return NS_ERROR_FAILURE;
+  }
+
+  // If the original point has been changed, refer mOldNextSibling if it's
+  // renasonable.  Otherwise, use end of the old container.
+  if (mOldNextSibling && mOldContainer != mOldNextSibling->GetParentNode()) {
+    // TODO: Check whether the new container is proper one for containing
+    //       mContentToMove.  However, there are few testcases so that we
+    //       shouldn't change here without creating a lot of undo tests.
+    if (mOldNextSibling->GetParentNode() &&
+        (mOldNextSibling->IsInComposedDoc() ||
+         !mOldContainer->IsInComposedDoc())) {
+      mOldContainer = mOldNextSibling->GetParentNode();
+    } else {
+      mOldNextSibling = nullptr;  // end of mOldContainer
+    }
+  }
+
+  if (MOZ_UNLIKELY(!HTMLEditUtils::IsRemovableNode(*mContentToMove))) {
+    NS_WARNING(
+        "MoveNodeTransaction::UndoTransaction() couldn't move the "
+        "content due to not removable from its current container");
+    return NS_ERROR_FAILURE;
+  }
+  if (MOZ_UNLIKELY(!HTMLEditUtils::IsSimplyEditableNode(*mOldContainer))) {
+    NS_WARNING(
+        "MoveNodeTransaction::UndoTransaction() couldn't move the "
+        "content into the old container due to non-editable one");
+    return NS_ERROR_FAILURE;
+  }
+
+  // And store the latest node which should be referred at redoing.
+  mContainer = mContentToMove->GetParentNode();
+  mReference = mContentToMove->GetNextSibling();
+
+  OwningNonNull<HTMLEditor> htmlEditor = *mHTMLEditor;
+  OwningNonNull<nsINode> oldContainer = *mOldContainer;
+  OwningNonNull<nsIContent> contentToMove = *mContentToMove;
+  nsCOMPtr<nsIContent> oldNextSibling = mOldNextSibling;
+  if (contentToMove->IsElement()) {
+    nsresult rv = htmlEditor->MarkElementDirty(
+        MOZ_KnownLive(*contentToMove->AsElement()));
+    if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
+      return EditorBase::ToGenericNSResult(rv);
+    }
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                         "EditorBase::MarkElementDirty() failed, but ignored");
+  }
+
+  {
+    AutoMoveNodeSelNotify notifyStoredRanges(
+        htmlEditor->RangeUpdaterRef(), EditorRawDOMPoint(contentToMove),
+        oldNextSibling ? EditorRawDOMPoint(oldNextSibling)
+                       : EditorRawDOMPoint::AtEndOf(oldContainer));
+    IgnoredErrorResult error;
+    oldContainer->InsertBefore(contentToMove, oldNextSibling, error);
+    // InsertBefore() may call MightThrowJSException() even if there is no
+    // error. We don't need the flag here.
+    error.WouldReportJSException();
+    if (error.Failed()) {
+      NS_WARNING("nsINode::InsertBefore() failed");
+      return error.StealNSResult();
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP MoveNodeTransaction::RedoTransaction() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p MoveNodeTransaction::%s this=%s", this, __FUNCTION__,
+           ToString(*this).c_str()));
+
+  if (NS_WARN_IF(!mHTMLEditor) || NS_WARN_IF(!mContentToMove) ||
+      NS_WARN_IF(!mContainer)) {
+    // Perhaps, nulled-out by the cycle collector.
+    return NS_ERROR_FAILURE;
+  }
+
+  // If the inserting point has been changed, refer mReference if it's
+  // renasonable.  Otherwise, use end of the container.
+  if (mReference && mContainer != mReference->GetParentNode()) {
+    // TODO: Check whether the new container is proper one for containing
+    //       mContentToMove.  However, there are few testcases so that we
+    //       shouldn't change here without creating a lot of redo tests.
+    if (mReference->GetParentNode() &&
+        (mReference->IsInComposedDoc() || !mContainer->IsInComposedDoc())) {
+      mContainer = mReference->GetParentNode();
+    } else {
+      mReference = nullptr;  // end of mContainer
+    }
+  }
+
+  if (MOZ_UNLIKELY(!HTMLEditUtils::IsRemovableNode(*mContentToMove))) {
+    NS_WARNING(
+        "MoveNodeTransaction::RedoTransaction() couldn't move the "
+        "content due to not removable from its current container");
+    return NS_ERROR_FAILURE;
+  }
+  if (MOZ_UNLIKELY(!HTMLEditUtils::IsSimplyEditableNode(*mContainer))) {
+    NS_WARNING(
+        "MoveNodeTransaction::RedoTransaction() couldn't move the "
+        "content into the new container due to non-editable one");
+    return NS_ERROR_FAILURE;
+  }
+
+  // And store the latest node which should be back.
+  mOldContainer = mContentToMove->GetParentNode();
+  mOldNextSibling = mContentToMove->GetNextSibling();
+
+  nsresult rv = DoTransactionInternal();
+  if (NS_FAILED(rv)) {
+    NS_WARNING("MoveNodeTransaction::DoTransactionInternal() failed");
+    return rv;
+  }
+
+  if (!mHTMLEditor->AllowsTransactionsToChangeSelection()) {
+    return NS_OK;
+  }
+
+  OwningNonNull<HTMLEditor> htmlEditor(*mHTMLEditor);
+  rv = htmlEditor->CollapseSelectionTo(
+      SuggestPointToPutCaret<EditorRawDOMPoint>());
+  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
+                       "EditorBase::CollapseSelectionTo() failed, but ignored");
+  return NS_OK;
+}
+
+}  // namespace mozilla