text: /*
   * Copyright (C) 2014 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:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * 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.
   *     * 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 THE COPYRIGHT
   * OWNER OR 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.
   */
  
  #ifndef SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORTSTATE_H_
  #define SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORTSTATE_H_
  
  #include "sky/engine/wtf/Assertions.h"
  
  namespace blink {
  
  class HTMLImportState {
  public:
      enum Value {
          BlockingScriptExecution = 0,
          Active,
          Ready,
          Invalid
      };
  
      explicit HTMLImportState(Value value = BlockingScriptExecution)
          : m_value(value)
      { }
  
      bool shouldBlockScriptExecution() const { return checkedValue() <= BlockingScriptExecution; }
      bool isReady() const { return checkedValue() == Ready; }
      bool isValid() const { return m_value != Invalid; }
      bool operator==(const HTMLImportState& other) const { return m_value == other.m_value; }
      bool operator!=(const HTMLImportState& other) const { return !(*this == other); }
      bool operator<=(const HTMLImportState& other) const { return m_value <= other.m_value; }
  
  #if !defined(NDEBUG)
      Value peekValueForDebug() const { return m_value; }
  #endif
  
      static HTMLImportState invalidState() { return HTMLImportState(Invalid); }
      static HTMLImportState blockedState() { return HTMLImportState(BlockingScriptExecution); }
  private:
      Value checkedValue() const;
      Value m_value;
  };
  
  inline HTMLImportState::Value HTMLImportState::checkedValue() const
  {
      ASSERT(isValid());
      return m_value;
  }
  
  }
  
  #endif  // SKY_ENGINE_CORE_HTML_IMPORTS_HTMLIMPORTSTATE_H_
  