pjs/layout/style/nsROCSSPrimitiveValue.h

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#ifndef nsROCSSPrimitiveValue_h___
#define nsROCSSPrimitiveValue_h___

#include "nsIDOMCSSPrimitiveValue.h"
#include "nsString.h"
#include "nsCoord.h"
#include "nsUnitConversion.h"
#include "nsReadableUtils.h"

#include "nsCOMPtr.h"
#include "nsDOMError.h"
#include "nsDOMCSSRect.h"

class nsROCSSPrimitiveValue : public nsIDOMCSSPrimitiveValue
{
public:
  NS_DECL_ISUPPORTS

  // nsIDOMCSSPrimitiveValue
  NS_DECL_NSIDOMCSSPRIMITIVEVALUE

  // nsIDOMCSSValue
  NS_DECL_NSIDOMCSSVALUE

  // nsROCSSPrimitiveValue
  nsROCSSPrimitiveValue(nsISupports *aOwner, float aP2T);
  virtual ~nsROCSSPrimitiveValue();

  void SetNumber(float aValue)
  {
    Reset();
    mValue.mFloat = aValue;
    mType = CSS_NUMBER;
  }
  
  void SetPercent(float aValue)
  {
    Reset();
    mValue.mFloat = aValue;
    mType = CSS_PERCENTAGE;
  }

  void SetTwips(nscoord aValue)
  {
    Reset();
    mValue.mTwips = aValue;
    mType = CSS_PX;
  }

  void SetString(const nsACString& aString)
  {
    Reset();
    mValue.mString = ToNewUnicode(aString);
    mType = CSS_STRING;
  }

  void SetString(const nsAString& aString)
  {
    Reset();
    mValue.mString = ToNewUnicode(aString);
    mType = CSS_STRING;
  }

  void SetURI(const nsACString& aString)
  {
    Reset();
    mValue.mString = ToNewUnicode(aString);
    mType = CSS_URI;
  }

  void SetURI(const nsAString& aString)
  {
    Reset();
    mValue.mString = ToNewUnicode(aString);
    mType = CSS_URI;
  }

  void SetRect(nsIDOMRect* aRect)
  {
    NS_PRECONDITION(aRect, "Null rect being set!");
    Reset();
    mValue.mRect = aRect;
    NS_ADDREF(mValue.mRect);
    mType = CSS_RECT;
  }

  void Reset(void)
  {
    if (mType == CSS_STRING || mType == CSS_URI) {
      NS_ASSERTION(mValue.mString, "Null string should never happen");
      nsMemory::Free(mValue.mString);
      mValue.mString = nsnull;
    } 
    else if (mType == CSS_RECT) {
      NS_ASSERTION(mValue.mRect, "Null Rect should never happen");
      NS_RELEASE(mValue.mRect);
      mValue.mRect = nsnull;
    }
  }

private:
  PRUint16 mType;

  union {
    nscoord mTwips;
    float mFloat;
    nsIDOMRect* mRect;
    PRUnichar* mString;
  } mValue;
  
  nsISupports *mOwner;

  float mT2P;
};

#endif /* nsROCSSPrimitiveValue_h___ */