third_party/WebKit/Source/platform/fonts/SmallCapsIterator.h

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SmallCapsIterator_h
#define SmallCapsIterator_h

#include "platform/fonts/FontOrientation.h"
#include "platform/fonts/ScriptRunIterator.h"
#include "platform/fonts/UTF16TextIterator.h"
#include "wtf/Allocator.h"
#include "wtf/Noncopyable.h"
#include <memory>

namespace blink {

class PLATFORM_EXPORT SmallCapsIterator {
  USING_FAST_MALLOC(SmallCapsIterator);
  WTF_MAKE_NONCOPYABLE(SmallCapsIterator);

 public:
  enum SmallCapsBehavior {
    SmallCapsSameCase,
    SmallCapsUppercaseNeeded,
    SmallCapsInvalid
  };

  SmallCapsIterator(const UChar* buffer, unsigned bufferSize);

  bool consume(unsigned* capsLimit, SmallCapsBehavior*);

 private:
  std::unique_ptr<UTF16TextIterator> m_utf16Iterator;
  unsigned m_bufferSize;
  UChar32 m_nextUChar32;
  bool m_atEnd;

  SmallCapsBehavior m_currentSmallCapsBehavior;
  SmallCapsBehavior m_previousSmallCapsBehavior;
};

}  // namespace blink

#endif