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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSVGValue_DEFINED
#define SkSVGValue_DEFINED
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPath.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkNoncopyable.h"
#include "modules/svg/include/SkSVGTypes.h"
class SK_API SkSVGValue : public SkNoncopyable {
public:
enum class Type {
kColor,
kFilter,
kLength,
kNumber,
kObjectBoundingBoxUnits,
kPreserveAspectRatio,
kStopColor,
kString,
kTransform,
kViewBox,
};
Type type() const { return fType; }
template <typename T>
const T* as() const {
return fType == T::TYPE ? static_cast<const T*>(this) : nullptr;
}
protected:
SkSVGValue(Type t) : fType(t) { }
private:
Type fType;
using INHERITED = SkNoncopyable;
};
template <typename T, SkSVGValue::Type ValueType>
class SK_API SkSVGWrapperValue final : public SkSVGValue {
public:
static constexpr Type TYPE = ValueType;
explicit SkSVGWrapperValue(const T& v)
: INHERITED(ValueType)
, fWrappedValue(v) { }
operator const T&() const { return fWrappedValue; }
const T* operator->() const { return &fWrappedValue; }
private:
// Stack-only
void* operator new(size_t) = delete;
void* operator new(size_t, void*) = delete;
const T& fWrappedValue;
using INHERITED = SkSVGValue;
};
using SkSVGColorValue = SkSVGWrapperValue<SkSVGColorType , SkSVGValue::Type::kColor >;
using SkSVGLengthValue = SkSVGWrapperValue<SkSVGLength , SkSVGValue::Type::kLength >;
using SkSVGTransformValue = SkSVGWrapperValue<SkSVGTransformType, SkSVGValue::Type::kTransform >;
using SkSVGViewBoxValue = SkSVGWrapperValue<SkSVGViewBoxType , SkSVGValue::Type::kViewBox >;
using SkSVGNumberValue = SkSVGWrapperValue<SkSVGNumberType , SkSVGValue::Type::kNumber >;
using SkSVGStringValue = SkSVGWrapperValue<SkSVGStringType , SkSVGValue::Type::kString >;
using SkSVGStopColorValue = SkSVGWrapperValue<SkSVGStopColor , SkSVGValue::Type::kStopColor >;
using SkSVGPreserveAspectRatioValue = SkSVGWrapperValue<SkSVGPreserveAspectRatio,
SkSVGValue::Type::kPreserveAspectRatio>;
using SkSVGObjectBoundingBoxUnitsValue = SkSVGWrapperValue<SkSVGObjectBoundingBoxUnits,
SkSVGValue::Type::kObjectBoundingBoxUnits>;
#endif // SkSVGValue_DEFINED
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