third_party/WebKit/Source/core/loader/FrameLoaderStateMachine.cpp

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Google, Inc. nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "core/loader/FrameLoaderStateMachine.h"

#include "wtf/Assertions.h"
#include "wtf/text/WTFString.h"

namespace blink {

FrameLoaderStateMachine::FrameLoaderStateMachine()
    : m_state(CreatingInitialEmptyDocument) {}

bool FrameLoaderStateMachine::committedFirstRealDocumentLoad() const {
  return m_state >= CommittedFirstRealLoad;
}

bool FrameLoaderStateMachine::creatingInitialEmptyDocument() const {
  return m_state == CreatingInitialEmptyDocument;
}

bool FrameLoaderStateMachine::committedMultipleRealLoads() const {
  return m_state == CommittedMultipleRealLoads;
}

bool FrameLoaderStateMachine::isDisplayingInitialEmptyDocument() const {
  return m_state >= DisplayingInitialEmptyDocument &&
         m_state < CommittedFirstRealLoad;
}

void FrameLoaderStateMachine::advanceTo(State state) {
  DCHECK_LT(m_state, state);
  m_state = state;
}

String FrameLoaderStateMachine::toString() const {
  switch (m_state) {
    case CreatingInitialEmptyDocument:
      return "CreatingInitialEmptyDocument";
    case DisplayingInitialEmptyDocument:
      return "DisplayingInitialEmptyDocument";
    case CommittedFirstRealLoad:
      return "CommittedFirstRealLoad";
    case CommittedMultipleRealLoads:
      return "CommittedMultipleRealLoads";
    default:
      NOTREACHED();
  }
  return "";
}

}  // namespace blink