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/*
* Copyright (C) 2011 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 StyleBuilder_h
#define StyleBuilder_h
#include "CSSPropertyNames.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class CSSValue;
class StyleBuilder;
class StyleResolver;
class PropertyHandler {
public:
typedef void (*InheritFunction)(CSSPropertyID, StyleResolver*);
typedef void (*InitialFunction)(CSSPropertyID, StyleResolver*);
typedef void (*ApplyFunction)(CSSPropertyID, StyleResolver*, CSSValue*);
PropertyHandler() : m_inherit(0), m_initial(0), m_apply(0) { }
PropertyHandler(InheritFunction inherit, InitialFunction initial, ApplyFunction apply) : m_inherit(inherit), m_initial(initial), m_apply(apply) { }
void applyInheritValue(CSSPropertyID propertyID, StyleResolver* styleResolver) const { ASSERT(m_inherit); (*m_inherit)(propertyID, styleResolver); }
void applyInitialValue(CSSPropertyID propertyID, StyleResolver* styleResolver) const { ASSERT(m_initial); (*m_initial)(propertyID, styleResolver); }
void applyValue(CSSPropertyID propertyID, StyleResolver* styleResolver, CSSValue* value) const { ASSERT(m_apply); (*m_apply)(propertyID, styleResolver, value); }
bool isValid() const { return m_inherit && m_initial && m_apply; }
InheritFunction inheritFunction() const { return m_inherit; }
InitialFunction initialFunction() { return m_initial; }
ApplyFunction applyFunction() { return m_apply; }
private:
InheritFunction m_inherit;
InitialFunction m_initial;
ApplyFunction m_apply;
};
class StyleBuilder {
WTF_MAKE_NONCOPYABLE(StyleBuilder); WTF_MAKE_FAST_ALLOCATED;
public:
static const StyleBuilder& sharedStyleBuilder();
const PropertyHandler& propertyHandler(CSSPropertyID property) const
{
ASSERT(valid(property));
return m_propertyMap[index(property)];
}
private:
StyleBuilder();
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, const PropertyHandler& handler)
{
ASSERT(valid(property));
ASSERT(!propertyHandler(property).isValid());
m_propertyMap[index(property)] = handler;
}
void setPropertyHandler(CSSPropertyID newProperty, CSSPropertyID equivalentProperty)
{
ASSERT(valid(newProperty));
ASSERT(valid(equivalentProperty));
ASSERT(!propertyHandler(newProperty).isValid());
m_propertyMap[index(newProperty)] = m_propertyMap[index(equivalentProperty)];
}
PropertyHandler m_propertyMap[numCSSProperties];
};
}
#endif // StyleBuilder_h
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