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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef NonInterpolableValue_h | 5 #ifndef NonInterpolableValue_h |
| 6 #define NonInterpolableValue_h | 6 #define NonInterpolableValue_h |
| 7 | 7 |
| 8 #include "wtf/RefCounted.h" | 8 #include "wtf/RefCounted.h" |
| 9 | 9 |
| 10 namespace blink { | 10 namespace blink { |
| 11 | 11 |
| 12 // Represents components of a PropertySpecificKeyframe's value that either do no
t change or 50% flip when interpolating with an adjacent value. | 12 // Represents components of a PropertySpecificKeyframe's value that either do |
| 13 // not change or 50% flip when interpolating with an adjacent value. |
| 13 class NonInterpolableValue : public RefCounted<NonInterpolableValue> { | 14 class NonInterpolableValue : public RefCounted<NonInterpolableValue> { |
| 14 public: | 15 public: |
| 15 virtual ~NonInterpolableValue() {} | 16 virtual ~NonInterpolableValue() {} |
| 16 | 17 |
| 17 typedef const void* Type; | 18 typedef const void* Type; |
| 18 virtual Type getType() const = 0; | 19 virtual Type getType() const = 0; |
| 19 }; | 20 }; |
| 20 | 21 |
| 21 // These macros provide safe downcasts of NonInterpolableValue subclasses with d
ebug assertions. | 22 // These macros provide safe downcasts of NonInterpolableValue subclasses with |
| 23 // debug assertions. |
| 22 // See CSSValueInterpolationType.cpp for example usage. | 24 // See CSSValueInterpolationType.cpp for example usage. |
| 23 #define DECLARE_NON_INTERPOLABLE_VALUE_TYPE() \ | 25 #define DECLARE_NON_INTERPOLABLE_VALUE_TYPE() \ |
| 24 static Type staticType; \ | 26 static Type staticType; \ |
| 25 Type getType() const final { return staticType; } | 27 Type getType() const final { return staticType; } |
| 26 | 28 |
| 27 #define DEFINE_NON_INTERPOLABLE_VALUE_TYPE(T) \ | 29 #define DEFINE_NON_INTERPOLABLE_VALUE_TYPE(T) \ |
| 28 NonInterpolableValue::Type T::staticType = &T::staticType; | 30 NonInterpolableValue::Type T::staticType = &T::staticType; |
| 29 | 31 |
| 30 #define DEFINE_NON_INTERPOLABLE_VALUE_TYPE_CASTS(T) \ | 32 #define DEFINE_NON_INTERPOLABLE_VALUE_TYPE_CASTS(T) \ |
| 31 inline bool is##T(const NonInterpolableValue* value) { \ | 33 inline bool is##T(const NonInterpolableValue* value) { \ |
| 32 return !value || value->getType() == T::staticType; \ | 34 return !value || value->getType() == T::staticType; \ |
| 33 } \ | 35 } \ |
| 34 DEFINE_TYPE_CASTS(T, NonInterpolableValue, value, is##T(value), \ | 36 DEFINE_TYPE_CASTS(T, NonInterpolableValue, value, is##T(value), \ |
| 35 is##T(&value)); | 37 is##T(&value)); |
| 36 | 38 |
| 37 } // namespace blink | 39 } // namespace blink |
| 38 | 40 |
| 39 #endif // NonInterpolableValue_h | 41 #endif // NonInterpolableValue_h |
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