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CSSStyleValue.h (2964B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef LAYOUT_STYLE_TYPEDOM_CSSSTYLEVALUE_H_
      8 #define LAYOUT_STYLE_TYPEDOM_CSSSTYLEVALUE_H_
      9 
     10 #include "js/TypeDecls.h"
     11 #include "nsCOMPtr.h"
     12 #include "nsISupports.h"
     13 #include "nsISupportsImpl.h"
     14 #include "nsStringFwd.h"
     15 #include "nsTArrayForwardDeclare.h"
     16 #include "nsWrapperCache.h"
     17 
     18 template <class T>
     19 class RefPtr;
     20 
     21 namespace mozilla {
     22 
     23 struct CSSPropertyId;
     24 class ErrorResult;
     25 
     26 namespace dom {
     27 
     28 class GlobalObject;
     29 class CSSKeywordValue;
     30 class CSSMathSum;
     31 class CSSUnitValue;
     32 class CSSUnsupportedValue;
     33 
     34 class CSSStyleValue : public nsISupports, public nsWrapperCache {
     35 public:
     36  enum class ValueType {
     37    Uninitialized,
     38    UnsupportedValue,
     39    KeywordValue,
     40    UnitValue,
     41    MathSum,
     42  };
     43 
     44  explicit CSSStyleValue(nsCOMPtr<nsISupports> aParent);
     45 
     46  CSSStyleValue(nsCOMPtr<nsISupports> aParent, ValueType aValueType);
     47 
     48  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
     49  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(CSSStyleValue)
     50 
     51  nsISupports* GetParentObject() const;
     52 
     53  JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
     54 
     55  // start of CSSStyleValue Web IDL declarations
     56 
     57  [[nodiscard]] static RefPtr<CSSStyleValue> Parse(const GlobalObject& aGlobal,
     58                                                   const nsACString& aProperty,
     59                                                   const nsACString& aCssText,
     60                                                   ErrorResult& aRv);
     61 
     62  static void ParseAll(const GlobalObject& aGlobal, const nsACString& aProperty,
     63                       const nsACString& aCssText,
     64                       nsTArray<RefPtr<CSSStyleValue>>& aRetVal,
     65                       ErrorResult& aRv);
     66 
     67  void Stringify(nsAString& aRetVal) const;
     68 
     69  // end of CSSStyleValue Web IDL declarations
     70 
     71  ValueType GetValueType() const { return mValueType; }
     72 
     73  bool IsCSSUnsupportedValue() const;
     74 
     75  // Defined in CSSUnsupportedValue.cpp
     76  CSSUnsupportedValue& GetAsCSSUnsupportedValue();
     77 
     78  // Returns nullptr if this value is not a CSSUnsupportedValue, caller must
     79  // null check.
     80  //
     81  // Defined in CSSUnsupportedValue.cpp
     82  const CSSPropertyId* GetPropertyId();
     83 
     84  bool IsCSSKeywordValue() const;
     85 
     86  // Defined in CSSKeywordValue.cpp
     87  CSSKeywordValue& GetAsCSSKeywordValue();
     88 
     89  bool IsCSSUnitValue() const;
     90 
     91  // Defined in CSSUnitValue.cpp
     92  CSSUnitValue& GetAsCSSUnitValue();
     93 
     94  bool IsCSSMathSum() const;
     95 
     96  // Defined in CSSMathSum.cpp
     97  CSSMathSum& GetAsCSSMathSum();
     98 
     99 protected:
    100  virtual ~CSSStyleValue() = default;
    101 
    102  nsCOMPtr<nsISupports> mParent;
    103  const ValueType mValueType;
    104 };
    105 
    106 }  // namespace dom
    107 }  // namespace mozilla
    108 
    109 #endif  // LAYOUT_STYLE_TYPEDOM_CSSSTYLEVALUE_H_