The result of adding any percentage factor to a size that is zero should also be zero

This commit is contained in:
JustOff 2019-03-21 21:45:08 +02:00 committed by Roy Tam
commit ca06378496

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@ -1439,13 +1439,14 @@ public:
/**
* This function increases an initial intrinsic size, 'aCurrent', according
* to the given 'aPercent', such that the size-increase makes up exactly
* 'aPercent' percent of the returned value. If 'aPercent' is less than
* or equal to zero the original 'aCurrent' value is returned. If 'aPercent'
* is greater than or equal to 1.0 the value nscoord_MAX is returned.
* 'aPercent' percent of the returned value. If 'aPercent' or 'aCurrent' are
* less than or equal to zero the original 'aCurrent' value is returned.
* If 'aPercent' is greater than or equal to 1.0 the value nscoord_MAX is
* returned.
*/
static nscoord AddPercents(nscoord aCurrent, float aPercent)
{
if (aPercent > 0.0f) {
if (aPercent > 0.0f && aCurrent > 0) {
return MOZ_UNLIKELY(aPercent >= 1.0f) ? nscoord_MAX
: NSToCoordRound(float(aCurrent) / (1.0f - aPercent));
}