/* -*- 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/. */

#ifndef GreekCasing_h_

#define GreekCasing_h_

#include <stdint.h>

#include "mozilla/Attributes.h"

namespace mozilla {

class GreekCasing {

  // When doing an Uppercase transform in Greek, we need to keep track of the

  // current state while iterating through the string, to recognize and process

  // diphthongs correctly. For clarity, we define a state for each vowel and

  // each vowel with accent, although a few of these do not actually need any

  // special treatment and could be folded into kStart.

private:

  enum GreekStates {

    kStart,

    kInWord,

    kAlpha,

    kEpsilon,

    kEta,

    kIota,

    kOmicron,

    kUpsilon,

    kOmega,

    kAlphaAcc,

    kEpsilonAcc,

    kEtaAcc,

    kEtaAccMarked,

    kIotaAcc,

    kOmicronAcc,

    kUpsilonAcc,

    kOmegaAcc,

    kOmicronUpsilon,

    kDiaeresis

  };

public:

  class State {

  public:

    State()

      : mState(kStart)

    {

    }

    MOZ_IMPLICIT State(const GreekStates& aState)

      : mState(aState)

    {

    }

    void Reset()

    {

      mState = kStart;

    }

    operator GreekStates() const

    {

      return mState;

    }

  private:

    GreekStates mState;

  };

  static uint32_t UpperCase(uint32_t aCh, State& aState,

                            bool& aMarkEtaPos, bool& aUpdateMarkedEta);

};

} // namespace mozilla

#endif