layout/style/nsROCSSPrimitiveValue.h

   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 /* DOM object representing values in DOM computed style */
   8
   9 #ifndef nsROCSSPrimitiveValue_h___
  10 #define nsROCSSPrimitiveValue_h___
  11
  12 #include "CSSValue.h"
  13 #include "nsCoord.h"
  14 #include "nsString.h"
  15
  16 class nsIURI;
  17
  18 /**
  19  * Read-only CSS primitive value - a DOM object representing values in DOM
  20  * computed style.
  21  */
  22 class nsROCSSPrimitiveValue final : public mozilla::dom::CSSValue {
  23  public:
  24   enum : uint16_t {
  25     CSS_UNKNOWN,
  26     CSS_NUMBER,
  27     CSS_PERCENTAGE,
  28     CSS_EMS,
  29     CSS_EXS,
  30     CSS_PX,
  31     CSS_CM,
  32     CSS_MM,
  33     CSS_IN,
  34     CSS_PT,
  35     CSS_PC,
  36     CSS_DEG,
  37     CSS_MS,
  38     CSS_S,
  39     CSS_HZ,
  40     CSS_KHZ,
  41     CSS_DIMENSION,
  42     CSS_STRING,
  43     CSS_URI,
  44     CSS_RGBCOLOR,
  45     CSS_NUMBER_INT32,
  46     CSS_NUMBER_UINT32,
  47   };
  48
  49   // CSSValue
  50   void GetCssText(nsString& aText, mozilla::ErrorResult& aRv) final;
  51   uint16_t CssValueType() const final;
  52
  53   // CSSPrimitiveValue
  54   uint16_t PrimitiveType();
  55
  56   // nsROCSSPrimitiveValue
  57   nsROCSSPrimitiveValue();
  58
  59   void SetNumber(float aValue);
  60   void SetNumber(int32_t aValue);
  61   void SetNumber(uint32_t aValue);
  62   void SetPercent(float aValue);
  63   void SetDegree(float aValue);
  64   void SetPixels(float aValue);
  65   void SetAppUnits(nscoord aValue);
  66   void SetAppUnits(float aValue);
  67   void SetString(const nsACString& aString);
  68   void SetString(const nsAString& aString);
  69
  70   template <size_t N>
  71   void SetString(const char (&aString)[N]) {
  72     SetString(nsLiteralCString(aString));
  73   }
  74
  75   void SetURI(nsIURI* aURI);
  76   void SetTime(float aValue);
  77   void Reset();
  78
  79   virtual ~nsROCSSPrimitiveValue();
  80
  81  protected:
  82   uint16_t mType;
  83
  84   union {
  85     float mFloat;
  86     int32_t mInt32;
  87     uint32_t mUint32;
  88     char16_t* mString;
  89     nsIURI* MOZ_OWNING_REF mURI;
  90   } mValue;
  91 };
  92
  93 inline nsROCSSPrimitiveValue* mozilla::dom::CSSValue::AsPrimitiveValue() {
  94   return CssValueType() == mozilla::dom::CSSValue::CSS_PRIMITIVE_VALUE
  95              ? static_cast<nsROCSSPrimitiveValue*>(this)
  96              : nullptr;
  97 }
  98
  99 #endif /* nsROCSSPrimitiveValue_h___ */