CSSStyleApplyProperty.h [plain text]
#ifndef CSSStyleApplyProperty_h
#define CSSStyleApplyProperty_h
#include "CSSPropertyNames.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class CSSStyleSelector;
class CSSValue;
class ApplyPropertyBase {
WTF_MAKE_NONCOPYABLE(ApplyPropertyBase);
WTF_MAKE_FAST_ALLOCATED;
public:
ApplyPropertyBase() { }
virtual ~ApplyPropertyBase() { }
virtual void applyInheritValue(CSSStyleSelector*) const = 0;
virtual void applyInitialValue(CSSStyleSelector*) const = 0;
virtual void applyValue(CSSStyleSelector*, CSSValue*) const = 0;
};
class CSSStyleApplyProperty {
WTF_MAKE_NONCOPYABLE(CSSStyleApplyProperty);
public:
static const CSSStyleApplyProperty& sharedCSSStyleApplyProperty();
void applyInheritValue(CSSPropertyID property, CSSStyleSelector* selector) const
{
ASSERT(implements(property));
propertyHandler(property)->applyInheritValue(selector);
}
void applyInitialValue(CSSPropertyID property, CSSStyleSelector* selector) const
{
ASSERT(implements(property));
propertyHandler(property)->applyInitialValue(selector);
}
void applyValue(CSSPropertyID property, CSSStyleSelector* selector, CSSValue* value) const
{
ASSERT(implements(property));
propertyHandler(property)->applyValue(selector, value);
}
bool implements(CSSPropertyID property) const
{
return propertyHandler(property);
}
private:
CSSStyleApplyProperty();
static int index(CSSPropertyID property)
{
return property - firstCSSProperty;
}
static bool valid(CSSPropertyID property)
{
int i = index(property);
return i >= 0 && i < numCSSProperties;
}
void setPropertyHandler(CSSPropertyID property, ApplyPropertyBase* value)
{
ASSERT(valid(property));
ASSERT(!propertyHandler(property));
m_propertyMap[index(property)] = value;
}
void setPropertyHandler(CSSPropertyID newProperty, CSSPropertyID equivalentProperty)
{
ASSERT(valid(newProperty));
ASSERT(valid(equivalentProperty));
ASSERT(!propertyHandler(newProperty));
m_propertyMap[index(newProperty)] = m_propertyMap[index(equivalentProperty)];
}
ApplyPropertyBase* propertyHandler(CSSPropertyID property) const
{
ASSERT(valid(property));
return m_propertyMap[index(property)];
}
ApplyPropertyBase* m_propertyMap[numCSSProperties];
};
}
#endif // CSSStyleApplyProperty_h