nsresult
nsThebesFontMetrics::GetBoundingMetrics(const PRUnichar *aString, PRUint32 aLength,
nsThebesRenderingContext *aContext,
nsBoundingMetrics &aBoundingMetrics)
{
if (aLength == 0) {
aBoundingMetrics.Clear();
return NS_OK;
}
AutoTextRun textRun(this, aContext, aString, aLength);
if (!textRun.get())
return NS_ERROR_FAILURE;
GetTextRunBoundingMetrics(textRun.get(), 0, aLength, aContext, aBoundingMetrics);
return NS_OK;
}
NS_IMETHODIMP
nsRenderingContextQt::GetBoundingMetrics(const char *aString,PRUint32 aLength,
nsBoundingMetrics &aBoundingMetrics)
{
aBoundingMetrics.Clear();
if (0 >= aLength || !aString || !mCurrentFont)
return(NS_ERROR_FAILURE);
QString str = QString::fromLatin1(aString, aLength);
QFontMetrics fm(mCurrentFont->font);
QRect br = fm.boundingRect(str);
aBoundingMetrics.width = NSToCoordRound(br.width() * mP2T);
aBoundingMetrics.ascent = NSToCoordRound(-br.y() * mP2T);
aBoundingMetrics.descent = NSToCoordRound(br.bottom() * mP2T);
aBoundingMetrics.leftBearing = NSToCoordRound(br.x() * mP2T);
aBoundingMetrics.rightBearing = NSToCoordRound(fm.rightBearing(str.at(aLength - 1)) * mP2T);
return NS_OK;
}