float
ProcessTranslatePart(const nsCSSValue& aValue,
nsStyleContext* aContext,
nsPresContext* aPresContext,
RuleNodeCacheConditions& aConditions,
TransformReferenceBox* aRefBox,
TransformReferenceBox::DimensionGetter aDimensionGetter)
{
nscoord offset = 0;
float percent = 0.0f;
if (aValue.GetUnit() == eCSSUnit_Percent) {
percent = aValue.GetPercentValue();
} else if (aValue.GetUnit() == eCSSUnit_Pixel ||
aValue.GetUnit() == eCSSUnit_Number) {
// Handle this here (even though nsRuleNode::CalcLength handles it
// fine) so that callers are allowed to pass a null style context
// and pres context to SetToTransformFunction if they know (as
// StyleAnimationValue does) that all lengths within the transform
// function have already been computed to pixels and percents.
//
// Raw numbers are treated as being pixels.
//
// Don't convert to aValue to AppUnits here to avoid precision issues.
return aValue.GetFloatValue();
} else if (aValue.IsCalcUnit()) {
nsRuleNode::ComputedCalc result =
nsRuleNode::SpecifiedCalcToComputedCalc(aValue, aContext, aPresContext,
aConditions);
percent = result.mPercent;
offset = result.mLength;
} else {
offset = nsRuleNode::CalcLength(aValue, aContext, aPresContext,
aConditions);
}
float translation = NSAppUnitsToFloatPixels(offset,
nsPresContext::AppUnitsPerCSSPixel());
// We want to avoid calling aDimensionGetter if there's no percentage to be
// resolved (for performance reasons - see TransformReferenceBox).
if (percent != 0.0f && aRefBox) {
translation += percent *
NSAppUnitsToFloatPixels((aRefBox->*aDimensionGetter)(),
nsPresContext::AppUnitsPerCSSPixel());
}
return translation;
}
float
ProcessTranslatePart(const nsCSSValue& aValue,
nsStyleContext* aContext,
nsPresContext* aPresContext,
bool& aCanStoreInRuleTree,
nscoord aSize)
{
nscoord offset = 0;
float percent = 0.0f;
if (aValue.GetUnit() == eCSSUnit_Percent) {
percent = aValue.GetPercentValue();
} else if (aValue.GetUnit() == eCSSUnit_Pixel ||
aValue.GetUnit() == eCSSUnit_Number) {
// Handle this here (even though nsRuleNode::CalcLength handles it
// fine) so that callers are allowed to pass a null style context
// and pres context to SetToTransformFunction if they know (as
// StyleAnimationValue does) that all lengths within the transform
// function have already been computed to pixels and percents.
//
// Raw numbers are treated as being pixels.
//
// Don't convert to aValue to AppUnits here to avoid precision issues.
return aValue.GetFloatValue();
} else if (aValue.IsCalcUnit()) {
nsRuleNode::ComputedCalc result =
nsRuleNode::SpecifiedCalcToComputedCalc(aValue, aContext, aPresContext,
aCanStoreInRuleTree);
percent = result.mPercent;
offset = result.mLength;
} else {
offset = nsRuleNode::CalcLength(aValue, aContext, aPresContext,
aCanStoreInRuleTree);
}
return (percent * NSAppUnitsToFloatPixels(aSize, nsPresContext::AppUnitsPerCSSPixel())) +
NSAppUnitsToFloatPixels(offset, nsPresContext::AppUnitsPerCSSPixel());
}