text: ////////////////////////////////////////////////////////////////////////////////
  /// @brief V8 line editor
  ///
  /// @file
  ///
  /// DISCLAIMER
  ///
  /// Copyright 2014 ArangoDB GmbH, Cologne, Germany
  /// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
  ///
  /// Licensed under the Apache License, Version 2.0 (the "License");
  /// you may not use this file except in compliance with the License.
  /// You may obtain a copy of the License at
  ///
  ///     http://www.apache.org/licenses/LICENSE-2.0
  ///
  /// Unless required by applicable law or agreed to in writing, software
  /// distributed under the License is distributed on an "AS IS" BASIS,
  /// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  /// See the License for the specific language governing permissions and
  /// limitations under the License.
  ///
  /// Copyright holder is ArangoDB GmbH, Cologne, Germany
  ///
  /// @author Dr. Frank Celler
  /// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
  /// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
  ////////////////////////////////////////////////////////////////////////////////
  
  #ifndef ARANGODB_V8_V8LINE_EDITOR_H
  #define ARANGODB_V8_V8LINE_EDITOR_H 1
  
  #include "Basics/Common.h"
  
  #include "Utilities/LineEditor.h"
  #include "Utilities/Completer.h"
  
  #include <v8.h>
  
  using namespace triagens;
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                                 class V8Completer
  // -----------------------------------------------------------------------------
  
  class V8Completer : public Completer {
  
    enum {
      NORMAL,             // start
      NORMAL_1,           // from NORMAL: seen a single /
      DOUBLE_QUOTE,       // from NORMAL: seen a single "
      DOUBLE_QUOTE_ESC,   // from DOUBLE_QUOTE: seen a backslash
      SINGLE_QUOTE,       // from NORMAL: seen a single '
      SINGLE_QUOTE_ESC,   // from SINGLE_QUOTE: seen a backslash
      MULTI_COMMENT,      // from NORMAL_1: seen a *
      MULTI_COMMENT_1,    // from MULTI_COMMENT, seen a *
      SINGLE_COMMENT      // from NORMAL_1; seen a /
    }
    state;
  
    virtual bool isComplete (std::string const&, 
                             size_t lineno, 
                             size_t column);
  
    virtual void getAlternatives (char const*, 
                                  std::vector<std::string>&);
  };
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                                class V8LineEditor
  // -----------------------------------------------------------------------------
  
  ////////////////////////////////////////////////////////////////////////////////
  /// @brief line editor
  ////////////////////////////////////////////////////////////////////////////////
  
  class V8LineEditor : public LineEditor {
  
    V8LineEditor (LineEditor const&) = delete;
    V8LineEditor& operator= (LineEditor const&) = delete;
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                      constructors and destructors
  // -----------------------------------------------------------------------------
  
    public:
  
  ////////////////////////////////////////////////////////////////////////////////
  /// @brief constructor
  ////////////////////////////////////////////////////////////////////////////////
  
      V8LineEditor (v8::Handle<v8::Context>, std::string const& history);
  
  ////////////////////////////////////////////////////////////////////////////////
  /// @brief destructor
  ////////////////////////////////////////////////////////////////////////////////
  
      ~V8LineEditor ();
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                                 protected methods
  // -----------------------------------------------------------------------------
  
  ////////////////////////////////////////////////////////////////////////////////
  /// @brief     creates a concrete Shell with the correct parameter (Completer!!)
  ////////////////////////////////////////////////////////////////////////////////
  
    protected:
  
      virtual void initializeShell();
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                                 private variables
  // -----------------------------------------------------------------------------
  
    private:
  
  ////////////////////////////////////////////////////////////////////////////////
  /// @brief context
  ////////////////////////////////////////////////////////////////////////////////
  
      v8::Handle<v8::Context> _context;
  
      V8Completer _completer;
  };
  
  #endif
  
  // -----------------------------------------------------------------------------
  // --SECTION--                                                       END-OF-FILE
  // -----------------------------------------------------------------------------
  
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