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* Copyright (c) 2013, Opera Software ASA. All rights reserved.
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* modification, are permitted provided that the following conditions are
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*
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*/
#ifndef BorderImageLength_h
#define BorderImageLength_h
#include "platform/Length.h"
namespace WebCore {
// Represents an individual computed border image width or outset.
//
// http://www.w3.org/TR/css3-background/#border-image-width
// http://www.w3.org/TR/css3-background/#border-image-outset
class BorderImageLength {
public:
BorderImageLength(double number)
: m_length(Undefined)
, m_number(number)
, m_type(NumberType)
{
}
BorderImageLength(const Length& length)
: m_length(length)
, m_number(0)
, m_type(LengthType)
{
}
bool isNumber() const { return m_type == NumberType; }
bool isLength() const { return m_type == LengthType; }
const Length& length() const { ASSERT(isLength()); return m_length; }
Length& length() { ASSERT(isLength()); return m_length; }
double number() const { ASSERT(isNumber()); return m_number; }
bool operator==(const BorderImageLength& other) const
{
return m_type == other.m_type && m_length == other.m_length && m_number == other.m_number;
}
bool isZero() const
{
return (isLength() && m_length.isZero()) || (isNumber() && m_number);
}
private:
// Ideally we would put the 2 following fields in a union, but Length has a constructor,
// a destructor and a copy assignment which isn't allowed.
Length m_length;
double m_number;
enum {
LengthType,
NumberType
} m_type;
};
} // namespace WebCore
#endif // BorderImageLength_h