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 /**
  17  * Read-only CSS primitive value - a DOM object representing values in DOM
  18  * computed style.
  19  */
  20 class nsROCSSPrimitiveValue final : public mozilla::dom::CSSValue {
  21  public:
  22   enum : uint16_t {
  23     CSS_UNKNOWN,
  24     CSS_NUMBER,
  25     CSS_PERCENTAGE,
  26     CSS_PX,
  27     CSS_DEG,
  28     CSS_S,
  29     CSS_STRING,
  30     CSS_RGBCOLOR,
  31     CSS_NUMBER_INT32,
  32     CSS_NUMBER_UINT32,
  33   };
  34
  35   // CSSValue
  36   void GetCssText(nsAString&) final;
  37   uint16_t CssValueType() const final;
  38
  39   // CSSPrimitiveValue
  40   uint16_t PrimitiveType();
  41
  42   // nsROCSSPrimitiveValue
  43   nsROCSSPrimitiveValue();
  44
  45   void SetNumber(float aValue);
  46   void SetNumber(int32_t aValue);
  47   void SetNumber(uint32_t aValue);
  48   void SetPercent(float aValue);
  49   void SetDegree(float aValue);
  50   void SetPixels(float aValue);
  51   void SetAppUnits(nscoord aValue);
  52   void SetAppUnits(float aValue);
  53   void SetString(const nsACString& aString);
  54   void SetString(const nsAString& aString);
  55
  56   template <size_t N>
  57   void SetString(const char (&aString)[N]) {
  58     SetString(nsLiteralCString(aString));
  59   }
  60
  61   void SetTime(float aValue);
  62   void Reset();
  63
  64   virtual ~nsROCSSPrimitiveValue();
  65
  66  protected:
  67   uint16_t mType;
  68
  69   union {
  70     float mFloat;
  71     int32_t mInt32;
  72     uint32_t mUint32;
  73     char16_t* mString;
  74   } mValue;
  75 };
  76
  77 inline nsROCSSPrimitiveValue* mozilla::dom::CSSValue::AsPrimitiveValue() {
  78   return CssValueType() == mozilla::dom::CSSValue::CSS_PRIMITIVE_VALUE
  79              ? static_cast<nsROCSSPrimitiveValue*>(this)
  80              : nullptr;
  81 }
  82
  83 #endif /* nsROCSSPrimitiveValue_h___ */