Quelle ReplaceTextTransaction.cpp Sprache: C

/* -*- 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 "ReplaceTextTransaction.h"

#include "HTMLEditUtils.h"

#include "mozilla/Logging.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/ToString.h"

namespace mozilla {

using namespace dom;

std::ostream& operator<<(std::ostream& aStream,
                         const ReplaceTextTransaction& aTransaction) {
  aStream << "{ mTextNode=" << aTransaction.mTextNode.get();
  if (aTransaction.mTextNode) {
    aStream << " (" << *aTransaction.mTextNode << ")";
  }
  aStream << ", mStringToInsert=\""
          << NS_ConvertUTF16toUTF8(aTransaction.mStringToInsert).get() << "\""
          << ", mStringToBeReplaced=\""
          << NS_ConvertUTF16toUTF8(aTransaction.mStringToBeReplaced).get()
          << "\", mOffset=" << aTransaction.mOffset
          << ", mEditorBase=" << aTransaction.mEditorBase.get() << " }";
  return aStream;
}

NS_IMPL_CYCLE_COLLECTION_INHERITED(ReplaceTextTransaction, EditTransactionBase,
                                   mEditorBase, mTextNode)

NS_IMPL_ADDREF_INHERITED(ReplaceTextTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(ReplaceTextTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ReplaceTextTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)

NS_IMETHODIMP ReplaceTextTransaction::DoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p ReplaceTextTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (MOZ_UNLIKELY(
          NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode) ||
          NS_WARN_IF(!HTMLEditUtils::IsSimplyEditableNode(*mTextNode)))) {
    return NS_ERROR_NOT_AVAILABLE;
  }

  OwningNonNull<EditorBase> editorBase = *mEditorBase;
  OwningNonNull<Text> textNode = *mTextNode;

  IgnoredErrorResult error;
  editorBase->DoReplaceText(textNode, mOffset, mStringToBeReplaced.Length(),
                            mStringToInsert, error);
  if (MOZ_UNLIKELY(error.Failed())) {
    NS_WARNING("EditorBase::DoReplaceText() failed");
    return error.StealNSResult();
  }
  // XXX What should we do if mutation event listener changed the node?
  editorBase->RangeUpdaterRef().SelAdjReplaceText(textNode, mOffset,
                                                  mStringToBeReplaced.Length(),
                                                  mStringToInsert.Length());
  return NS_OK;
}

NS_IMETHODIMP ReplaceTextTransaction::UndoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p ReplaceTextTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (MOZ_UNLIKELY(
          NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode) ||
          NS_WARN_IF(!HTMLEditUtils::IsSimplyEditableNode(*mTextNode)))) {
    return NS_ERROR_NOT_AVAILABLE;
  }

  IgnoredErrorResult error;
  nsAutoString insertedString;
  mTextNode->SubstringData(mOffset, mStringToInsert.Length(), insertedString,
                           error);
  if (MOZ_UNLIKELY(error.Failed())) {
    NS_WARNING("CharacterData::SubstringData() failed");
    return error.StealNSResult();
  }
  if (MOZ_UNLIKELY(insertedString != mStringToInsert)) {
    NS_WARNING(
        "ReplaceTextTransaction::UndoTransaction() did nothing due to "
        "unexpected text");
    return NS_OK;
  }

  OwningNonNull<EditorBase> editorBase = *mEditorBase;
  OwningNonNull<Text> textNode = *mTextNode;

  editorBase->DoReplaceText(textNode, mOffset, mStringToInsert.Length(),
                            mStringToBeReplaced, error);
  if (MOZ_UNLIKELY(error.Failed())) {
    NS_WARNING("EditorBase::DoReplaceText() failed");
    return error.StealNSResult();
  }
  // XXX What should we do if mutation event listener changed the node?
  editorBase->RangeUpdaterRef().SelAdjReplaceText(textNode, mOffset,
                                                  mStringToInsert.Length(),
                                                  mStringToBeReplaced.Length());

  if (!editorBase->AllowsTransactionsToChangeSelection()) {
    return NS_OK;
  }

  // XXX Should we stop setting selection when mutation event listener
  //     modifies the text node?
  editorBase->CollapseSelectionTo(
      EditorRawDOMPoint(textNode, mOffset + mStringToBeReplaced.Length()),
      error);
  if (MOZ_UNLIKELY(error.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
    NS_WARNING(
        "EditorBase::CollapseSelectionTo() caused destroying the editor");
    return NS_ERROR_EDITOR_DESTROYED;
  }
  NS_ASSERTION(!error.Failed(),
               "EditorBase::CollapseSelectionTo() failed, but ignored");
  return NS_OK;
}

NS_IMETHODIMP ReplaceTextTransaction::RedoTransaction() {
  MOZ_LOG(GetLogModule(), LogLevel::Info,
          ("%p ReplaceTextTransaction::%s this=%s", this, __FUNCTION__,
           ToString(*this).c_str()));

  if (MOZ_UNLIKELY(
          NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode) ||
          NS_WARN_IF(!HTMLEditUtils::IsSimplyEditableNode(*mTextNode)))) {
    return NS_ERROR_NOT_AVAILABLE;
  }

  IgnoredErrorResult error;
  nsAutoString undoneString;
  mTextNode->SubstringData(mOffset, mStringToBeReplaced.Length(), undoneString,
                           error);
  if (MOZ_UNLIKELY(error.Failed())) {
    NS_WARNING("CharacterData::SubstringData() failed");
    return error.StealNSResult();
  }
  if (MOZ_UNLIKELY(undoneString != mStringToBeReplaced)) {
    NS_WARNING(
        "ReplaceTextTransaction::RedoTransaction() did nothing due to "
        "unexpected text");
    return NS_OK;
  }

  OwningNonNull<EditorBase> editorBase = *mEditorBase;
  OwningNonNull<Text> textNode = *mTextNode;

  editorBase->DoReplaceText(textNode, mOffset, mStringToBeReplaced.Length(),
                            mStringToInsert, error);
  if (MOZ_UNLIKELY(error.Failed())) {
    NS_WARNING("EditorBase::DoReplaceText() failed");
    return error.StealNSResult();
  }
  // XXX What should we do if mutation event listener changed the node?
  editorBase->RangeUpdaterRef().SelAdjReplaceText(textNode, mOffset,
                                                  mStringToBeReplaced.Length(),
                                                  mStringToInsert.Length());

  if (!editorBase->AllowsTransactionsToChangeSelection()) {
    return NS_OK;
  }

  // XXX Should we stop setting selection when mutation event listener
  //     modifies the text node?
  editorBase->CollapseSelectionTo(SuggestPointToPutCaret<EditorRawDOMPoint>(),
                                  error);
  if (MOZ_UNLIKELY(error.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
    NS_WARNING(
        "EditorBase::CollapseSelectionTo() caused destroying the editor");
    return NS_ERROR_EDITOR_DESTROYED;
  }
  NS_ASSERTION(!error.Failed(),
               "EditorBase::CollapseSelectionTo() failed, but ignored");
  return NS_OK;
}

}  // namespace mozilla

quality100%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.