third_party/WebKit/Source/core/css/CSSUnsetValue.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CSSUnsetValue_h
   6 #define CSSUnsetValue_h
   7
   8 #include "core/css/CSSValue.h"
   9 #include "wtf/PassRefPtr.h"
  10
  11 namespace blink {
  12
  13 class CSSUnsetValue : public CSSValue {
  14 public:
  15     static PassRefPtrWillBeRawPtr<CSSUnsetValue> create()
  16     {
  17         return adoptRefWillBeNoop(new CSSUnsetValue);
  18     }
  19
  20     String customCSSText() const;
  21
  22     bool equals(const CSSUnsetValue&) const { return true; }
  23
  24     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
  25
  26 private:
  27     CSSUnsetValue()
  28         : CSSValue(UnsetClass)
  29     {
  30     }
  31 };
  32
  33 DEFINE_CSS_VALUE_TYPE_CASTS(CSSUnsetValue, isUnsetValue());
  34
  35 } // namespace blink
  36
  37 #endif // CSSUnsetValue_h