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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* 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 CSSValue_h
#define CSSValue_h
#include "ExceptionCode.h"
#include "KURLHash.h"
#include <wtf/ListHashSet.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class StyleSheetContents;
// FIXME: The current CSSValue and subclasses should be turned into internal types (StyleValue).
// The few subtypes that are actually exposed in CSSOM can be seen in the cloneForCSSOM() function.
// They should be handled by separate wrapper classes.
// Please don't expose more CSSValue types to the web.
class CSSValue : public RefCounted<CSSValue> {
public:
enum Type {
CSS_INHERIT = 0,
CSS_PRIMITIVE_VALUE = 1,
CSS_VALUE_LIST = 2,
CSS_CUSTOM = 3,
CSS_INITIAL = 4
};
// Override RefCounted's deref() to ensure operator delete is called on
// the appropriate subclass type.
void deref()
{
if (derefBase())
destroy();
}
Type cssValueType() const;
String cssText() const;
void setCssText(const String&, ExceptionCode&) { } // FIXME: Not implemented.
#if ENABLE(CSS_VARIABLES)
String serializeResolvingVariables(const HashMap<AtomicString, String>&) const;
#endif
bool isPrimitiveValue() const { return m_classType == PrimitiveClass; }
bool isValueList() const { return m_classType >= ValueListClass; }
bool isAspectRatioValue() const { return m_classType == AspectRatioClass; }
bool isBorderImageSliceValue() const { return m_classType == BorderImageSliceClass; }
bool isCursorImageValue() const { return m_classType == CursorImageClass; }
bool isFontFeatureValue() const { return m_classType == FontFeatureClass; }
bool isFontValue() const { return m_classType == FontClass; }
bool isImageGeneratorValue() const { return m_classType >= CanvasClass && m_classType <= RadialGradientClass; }
#if ENABLE(CSS_IMAGE_SET)
bool isImageSetValue() const { return m_classType == ImageSetClass; }
#endif
bool isImageValue() const { return m_classType == ImageClass || m_classType == CursorImageClass; }
bool isImplicitInitialValue() const;
bool isInheritedValue() const { return m_classType == InheritedClass; }
bool isInitialValue() const { return m_classType == InitialClass; }
bool isReflectValue() const { return m_classType == ReflectClass; }
bool isShadowValue() const { return m_classType == ShadowClass; }
bool isCubicBezierTimingFunctionValue() const { return m_classType == CubicBezierTimingFunctionClass; }
bool isLinearTimingFunctionValue() const { return m_classType == LinearTimingFunctionClass; }
bool isStepsTimingFunctionValue() const { return m_classType == StepsTimingFunctionClass; }
bool isWebKitCSSTransformValue() const { return m_classType == WebKitCSSTransformClass; }
bool isCSSLineBoxContainValue() const { return m_classType == LineBoxContainClass; }
bool isCalculationValue() const {return m_classType == CalculationClass; }
#if ENABLE(CSS_FILTERS)
bool isWebKitCSSFilterValue() const { return m_classType == WebKitCSSFilterClass; }
#if ENABLE(CSS_SHADERS)
bool isWebKitCSSShaderValue() const { return m_classType == WebKitCSSShaderClass; }
#endif
#endif // ENABLE(CSS_FILTERS)
#if ENABLE(CSS_VARIABLES)
bool isVariableValue() const { return m_classType == VariableClass; }
#endif
#if ENABLE(SVG)
bool isSVGColor() const { return m_classType == SVGColorClass || m_classType == SVGPaintClass; }
bool isSVGPaint() const { return m_classType == SVGPaintClass; }
bool isWebKitCSSSVGDocumentValue() const { return m_classType == WebKitCSSSVGDocumentClass; }
#endif
bool isCSSOMSafe() const { return m_isCSSOMSafe; }
bool isSubtypeExposedToCSSOM() const
{
return isPrimitiveValue()
#if ENABLE(SVG)
|| isSVGColor()
#endif
|| isValueList();
}
PassRefPtr<CSSValue> cloneForCSSOM() const;
void addSubresourceStyleURLs(ListHashSet<KURL>&, const StyleSheetContents*) const;
protected:
static const size_t ClassTypeBits = 5;
enum ClassType {
PrimitiveClass,
// Image classes.
ImageClass,
CursorImageClass,
// Image generator classes.
CanvasClass,
CrossfadeClass,
LinearGradientClass,
RadialGradientClass,
// Timing function classes.
CubicBezierTimingFunctionClass,
LinearTimingFunctionClass,
StepsTimingFunctionClass,
// Other class types.
AspectRatioClass,
BorderImageSliceClass,
FontFeatureClass,
FontClass,
FontFaceSrcClass,
FunctionClass,
InheritedClass,
InitialClass,
ReflectClass,
ShadowClass,
UnicodeRangeClass,
LineBoxContainClass,
CalculationClass,
#if ENABLE(CSS_FILTERS) && ENABLE(CSS_SHADERS)
WebKitCSSShaderClass,
#endif
#if ENABLE(CSS_VARIABLES)
VariableClass,
#endif
#if ENABLE(SVG)
SVGColorClass,
SVGPaintClass,
WebKitCSSSVGDocumentClass,
#endif
// List class types must appear after ValueListClass.
ValueListClass,
#if ENABLE(CSS_IMAGE_SET)
ImageSetClass,
#endif
#if ENABLE(CSS_FILTERS)
WebKitCSSFilterClass,
#endif
WebKitCSSTransformClass,
// Do not append non-list class types here.
};
static const size_t ValueListSeparatorBits = 2;
enum ValueListSeparator {
SpaceSeparator,
CommaSeparator,
SlashSeparator
};
ClassType classType() const { return static_cast<ClassType>(m_classType); }
explicit CSSValue(ClassType classType, bool isCSSOMSafe = false)
: m_isCSSOMSafe(isCSSOMSafe)
, m_isTextClone(false)
, m_primitiveUnitType(0)
, m_hasCachedCSSText(false)
, m_isQuirkValue(false)
, m_valueListSeparator(SpaceSeparator)
, m_classType(classType)
{
}
// NOTE: This class is non-virtual for memory and performance reasons.
// Don't go making it virtual again unless you know exactly what you're doing!
~CSSValue() { }
private:
void destroy();
protected:
unsigned m_isCSSOMSafe : 1;
unsigned m_isTextClone : 1;
// The bits in this section are only used by specific subclasses but kept here
// to maximize struct packing.
// CSSPrimitiveValue bits:
unsigned m_primitiveUnitType : 7; // CSSPrimitiveValue::UnitTypes
mutable unsigned m_hasCachedCSSText : 1;
unsigned m_isQuirkValue : 1;
unsigned m_valueListSeparator : ValueListSeparatorBits;
private:
unsigned m_classType : ClassTypeBits; // ClassType
};
} // namespace WebCore
#endif // CSSValue_h
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