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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef CounterDirectives_h
#define CounterDirectives_h
#include <wtf/HashMap.h>
#include <wtf/MathExtras.h>
#include <wtf/RefPtr.h>
#include <wtf/text/AtomicString.h>
#include <wtf/text/AtomicStringHash.h>
namespace WebCore {
class CounterDirectives {
public:
CounterDirectives()
: m_isResetSet(false)
, m_isIncrementSet(false)
, m_resetValue(0)
, m_incrementValue(0)
{
}
// FIXME: The code duplication here could possibly be replaced by using two
// maps, or by using a container that held two generic Directive objects.
bool isReset() const { return m_isResetSet; }
int resetValue() const { return m_resetValue; }
void setResetValue(int value)
{
m_resetValue = value;
m_isResetSet = true;
}
void clearReset()
{
m_resetValue = 0;
m_isResetSet = false;
}
void inheritReset(CounterDirectives& parent)
{
m_resetValue = parent.m_resetValue;
m_isResetSet = parent.m_isResetSet;
}
bool isIncrement() const { return m_isIncrementSet; }
int incrementValue() const { return m_incrementValue; }
void addIncrementValue(int value)
{
m_incrementValue = clampToInteger((double)m_incrementValue + value);
m_isIncrementSet = true;
}
void clearIncrement()
{
m_incrementValue = 0;
m_isIncrementSet = false;
}
void inheritIncrement(CounterDirectives& parent)
{
m_incrementValue = parent.m_incrementValue;
m_isIncrementSet = parent.m_isIncrementSet;
}
bool isDefined() const { return isReset() || isIncrement(); }
int combinedValue() const
{
ASSERT(m_isResetSet || !m_resetValue);
ASSERT(m_isIncrementSet || !m_incrementValue);
// FIXME: Shouldn't allow overflow here.
return m_resetValue + m_incrementValue;
}
private:
bool m_isResetSet;
bool m_isIncrementSet;
int m_resetValue;
int m_incrementValue;
};
bool operator==(const CounterDirectives&, const CounterDirectives&);
inline bool operator!=(const CounterDirectives& a, const CounterDirectives& b) { return !(a == b); }
typedef HashMap<AtomicString, CounterDirectives> CounterDirectiveMap;
PassOwnPtr<CounterDirectiveMap> clone(const CounterDirectiveMap&);
} // namespace WebCore
#endif // CounterDirectives_h
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