/*
 * Copyright (C) 2012 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 INC. 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.
 */

#ifndef DateTimeNumericFieldElement_h
#define DateTimeNumericFieldElement_h

#include "core/html/shadow/DateTimeFieldElement.h"
#include "wtf/Allocator.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"

namespace blink {

// DateTimeNumericFieldElement represents numeric field of date time format,
// such as:
//  - hour
//  - minute
//  - millisecond
//  - second
//  - year
class DateTimeNumericFieldElement : public DateTimeFieldElement {
  WTF_MAKE_NONCOPYABLE(DateTimeNumericFieldElement);

 public:
  struct Step {
    DISALLOW_NEW();
    Step(int step = 1, int stepBase = 0) : step(step), stepBase(stepBase) {}
    int step;
    int stepBase;
  };

  struct Range {
    DISALLOW_NEW();
    Range(int minimum, int maximum) : minimum(minimum), maximum(maximum) {}
    int clampValue(int) const;
    bool isInRange(int) const;
    bool isSingleton() const { return minimum == maximum; }

    int minimum;
    int maximum;
  };

 protected:
  DateTimeNumericFieldElement(Document&,
                              FieldOwner&,
                              const Range&,
                              const Range& hardLimits,
                              const String& placeholder,
                              const Step& = Step());

  int clampValue(int value) const { return m_range.clampValue(value); }
  virtual int defaultValueForStepDown() const;
  virtual int defaultValueForStepUp() const;
  const Range& range() const { return m_range; }

  // DateTimeFieldElement functions.
  bool hasValue() const final;
  void initialize(const AtomicString& pseudo, const String& axHelpText);
  int maximum() const;
  void setEmptyValue(EventBehavior = DispatchNoEvent) final;
  void setValueAsInteger(int, EventBehavior = DispatchNoEvent) override;
  int valueAsInteger() const final;
  String visibleValue() const final;

 private:
  // DateTimeFieldElement functions.
  void handleKeyboardEvent(KeyboardEvent*) final;
  float maximumWidth(const ComputedStyle&) override;
  void stepDown() final;
  void stepUp() final;
  String value() const final;

  // Node functions.
  void setFocused(bool) final;

  String formatValue(int) const;
  int roundUp(int) const;
  int roundDown(int) const;
  int typeAheadValue() const;

  const String m_placeholder;
  const Range m_range;
  const Range m_hardLimits;
  const Step m_step;
  int m_value;
  bool m_hasValue;
  mutable StringBuilder m_typeAheadBuffer;
};

}  // namespace blink

#endif
