gecko-dev/layout/style/nsROCSSPrimitiveValue.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
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 *
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#include "nsROCSSPrimitiveValue.h"

#include "nsCOMPtr.h"
#include "nsDOMError.h"
#include "prprf.h"
#include "nsContentUtils.h"

nsROCSSPrimitiveValue::nsROCSSPrimitiveValue(nsISupports *aOwner, float aT2P)
  : mType(CSS_PX), mTwips(0), mString(), mFloat(0), mOwner(aOwner), mT2P(aT2P)
{
  NS_INIT_REFCNT();
}


nsROCSSPrimitiveValue::~nsROCSSPrimitiveValue()
{
}


NS_IMPL_ADDREF(nsROCSSPrimitiveValue);
NS_IMPL_RELEASE(nsROCSSPrimitiveValue);


// QueryInterface implementation for nsROCSSPrimitiveValue
NS_INTERFACE_MAP_BEGIN(nsROCSSPrimitiveValue)
  NS_INTERFACE_MAP_ENTRY(nsIDOMCSSPrimitiveValue)
  NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMCSSPrimitiveValue)
  NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(ROCSSPrimitiveValue)
NS_INTERFACE_MAP_END


// nsIDOMCSSValue


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssText(nsAWritableString& aCssText)
{
  nsAutoString tmpStr;
  aCssText.Truncate();
  nsresult result = NS_OK;

  switch (mType) {
    case CSS_PX :
      {
        float val = NSTwipsToFloatPixels(mTwips, mT2P);
        tmpStr.AppendFloat(val);
        tmpStr.Append(NS_LITERAL_STRING("px"));
        break;
      }
    case CSS_CM :
      {
        float val = NS_TWIPS_TO_CENTIMETERS(mTwips);
        tmpStr.AppendFloat(val);
        tmpStr.Append(NS_LITERAL_STRING("cm"));
        break;
      }
    case CSS_MM :
      {
        float val = NS_TWIPS_TO_MILLIMETERS(mTwips);
        tmpStr.AppendFloat(val);
        tmpStr.Append(NS_LITERAL_STRING("mm"));
        break;
      }
    case CSS_IN :
      {
        float val = NS_TWIPS_TO_INCHES(mTwips);
        tmpStr.AppendFloat(val);
        tmpStr.Append(NS_LITERAL_STRING("in"));
        break;
      }
    case CSS_PT :
      {
        float val = NSTwipsToFloatPoints(mTwips);
        tmpStr.AppendFloat(val);
        tmpStr.Append(NS_LITERAL_STRING("pt"));
        break;
      }
    case CSS_STRING :
      {
        tmpStr.Append(mString);
        break;
      }
    case CSS_PERCENTAGE :
      {
        tmpStr.AppendFloat(mFloat * 100);
        tmpStr.Append(PRUnichar('%'));
        break;
      }
    case CSS_RECT :
      {
        NS_NAMED_LITERAL_STRING(comma, ", ");
        nsCOMPtr<nsIDOMCSSPrimitiveValue> sideCSSValue;
        nsAutoString sideValue;
        tmpStr = NS_LITERAL_STRING("rect(");
        // get the top
        result = mRect->GetTop(getter_AddRefs(sideCSSValue));
        if (NS_FAILED(result))
          break;
        result = sideCSSValue->GetCssText(sideValue);
        if (NS_FAILED(result))
          break;
        tmpStr.Append(sideValue + comma);
        // get the right
        result = mRect->GetRight(getter_AddRefs(sideCSSValue));
        if (NS_FAILED(result))
          break;
        result = sideCSSValue->GetCssText(sideValue);
        if (NS_FAILED(result))
          break;
        tmpStr.Append(sideValue + comma);
        // get the bottom
        result = mRect->GetBottom(getter_AddRefs(sideCSSValue));
        if (NS_FAILED(result))
          break;
        result = sideCSSValue->GetCssText(sideValue);
        if (NS_FAILED(result))
          break;
        tmpStr.Append(sideValue + comma);
        // get the left
        result = mRect->GetLeft(getter_AddRefs(sideCSSValue));
        if (NS_FAILED(result))
          break;
        result = sideCSSValue->GetCssText(sideValue);
        if (NS_FAILED(result))
          break;
        tmpStr.Append(sideValue + NS_LITERAL_STRING(")"));
        break;
      }
    case CSS_PC :
    case CSS_UNKNOWN :
    case CSS_NUMBER :
    case CSS_EMS :
    case CSS_EXS :
    case CSS_DEG :
    case CSS_RAD :
    case CSS_GRAD :
    case CSS_MS :
    case CSS_S :
    case CSS_HZ :
    case CSS_KHZ :
    case CSS_DIMENSION :
    case CSS_URI :
    case CSS_IDENT :
    case CSS_ATTR :
    case CSS_COUNTER :
    case CSS_RGBCOLOR :
      return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }

  if (NS_SUCCEEDED(result)) {
    aCssText.Assign(tmpStr);
  }

  return NS_OK;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::SetCssText(const nsAReadableString& aCssText)
{
  return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCssValueType(PRUint16* aValueType)
{
  NS_ENSURE_ARG_POINTER(aValueType);
  *aValueType = nsIDOMCSSValue::CSS_PRIMITIVE_VALUE;
  return NS_OK;
}


// nsIDOMCSSPrimitiveValue

NS_IMETHODIMP
nsROCSSPrimitiveValue::GetPrimitiveType(PRUint16* aPrimitiveType)
{
  NS_ENSURE_ARG_POINTER(aPrimitiveType);
  *aPrimitiveType = mType;

  return NS_OK;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::SetFloatValue(PRUint16 aUnitType, float aFloatValue)
{
  return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetFloatValue(PRUint16 aUnitType, float* aReturn)
{
  NS_ENSURE_ARG_POINTER(aReturn);
  *aReturn = 0;

  if (mType == CSS_STRING) {
    return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }

  switch(aUnitType) {
    case CSS_PX :
      *aReturn = NSTwipsToFloatPixels(mTwips, mT2P);
      break;
    case CSS_CM :
      *aReturn = NS_TWIPS_TO_CENTIMETERS(mTwips);
      break;
    case CSS_MM :
      *aReturn = NS_TWIPS_TO_MILLIMETERS(mTwips);
      break;
    case CSS_IN :
      *aReturn = NS_TWIPS_TO_INCHES(mTwips);
      break;
    case CSS_PT :
      *aReturn = NSTwipsToFloatPoints(mTwips);
      break;
    case CSS_PERCENTAGE :
      *aReturn = mFloat * 100;
      break;
    case CSS_PC :
    case CSS_UNKNOWN :
    case CSS_NUMBER :
    case CSS_EMS :
    case CSS_EXS :
    case CSS_DEG :
    case CSS_RAD :
    case CSS_GRAD :
    case CSS_MS :
    case CSS_S :
    case CSS_HZ :
    case CSS_KHZ :
    case CSS_DIMENSION :
    case CSS_STRING :
    case CSS_URI :
    case CSS_IDENT :
    case CSS_ATTR :
    case CSS_COUNTER :
    case CSS_RECT :
    case CSS_RGBCOLOR :
      return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }

  return NS_OK;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::SetStringValue(PRUint16 aStringType,
                                      const nsAReadableString& aStringValue)
{
  return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetStringValue(nsAWritableString& aReturn)
{
  if (mType != CSS_STRING) {
    aReturn.Truncate();
    return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }
  aReturn.Assign(mString);
  return NS_OK;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetCounterValue(nsIDOMCounter** aReturn)
{
  return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}


NS_IMETHODIMP
nsROCSSPrimitiveValue::GetRectValue(nsIDOMRect** aReturn)
{
  if (mType != CSS_RECT || !mRect) {
    *aReturn = nsnull;
    return NS_ERROR_DOM_INVALID_ACCESS_ERR;
  }
  return CallQueryInterface(mRect, aReturn);
}


NS_IMETHODIMP 
nsROCSSPrimitiveValue::GetRGBColorValue(nsIDOMRGBColor** aReturn)
{
  return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
}