// Helper function to parse a string into a StyleAnimationValue
static bool
ValueFromStringHelper(nsCSSPropertyID aPropID,
Element* aTargetElement,
nsPresContext* aPresContext,
mozilla::GeckoStyleContext* aStyleContext,
const nsAString& aString,
StyleAnimationValue& aStyleAnimValue,
bool* aIsContextSensitive)
{
bool isNegative = false;
const nsDependentSubstring subString =
GetNonNegativePropValue(aString, aPropID, isNegative);
if (!StyleAnimationValue::ComputeValue(aPropID, aTargetElement, aStyleContext,
subString, true, aStyleAnimValue,
aIsContextSensitive)) {
return false;
}
if (isNegative) {
InvertSign(aStyleAnimValue);
}
if (aPropID == eCSSProperty_font_size) {
// Divide out text-zoom, since SVG is supposed to ignore it
MOZ_ASSERT(aStyleAnimValue.GetUnit() == StyleAnimationValue::eUnit_Coord,
"'font-size' value with unexpected style unit");
aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
aPresContext->EffectiveTextZoom());
}
return true;
}
// Helper function to parse a string into a StyleAnimationValue
static bool
ValueFromStringHelper(nsCSSPropertyID aPropID,
Element* aTargetElement,
nsPresContext* aPresContext,
const nsAString& aString,
StyleAnimationValue& aStyleAnimValue,
bool* aIsContextSensitive)
{
// If value is negative, we'll strip off the "-" so the CSS parser won't
// barf, and then manually make the parsed value negative.
// (This is a partial solution to let us accept some otherwise out-of-bounds
// CSS values. Bug 501188 will provide a more complete fix.)
bool isNegative = false;
uint32_t subStringBegin = 0;
// NOTE: We need to opt-out 'stroke-dasharray' from the negative-number
// check. Its values might look negative (e.g. by starting with "-1"), but
// they're more complicated than our simple negation logic here can handle.
if (aPropID != eCSSProperty_stroke_dasharray) {
int32_t absValuePos = nsSMILParserUtils::CheckForNegativeNumber(aString);
if (absValuePos > 0) {
isNegative = true;
subStringBegin = (uint32_t)absValuePos; // Start parsing after '-' sign
}
}
RefPtr<nsStyleContext> styleContext =
nsComputedDOMStyle::GetStyleContextForElement(aTargetElement, nullptr,
aPresContext->PresShell());
if (!styleContext) {
return false;
}
nsDependentSubstring subString(aString, subStringBegin);
if (!StyleAnimationValue::ComputeValue(aPropID, aTargetElement, styleContext,
subString, true, aStyleAnimValue,
aIsContextSensitive)) {
return false;
}
if (isNegative) {
InvertSign(aStyleAnimValue);
}
if (aPropID == eCSSProperty_font_size) {
// Divide out text-zoom, since SVG is supposed to ignore it
MOZ_ASSERT(aStyleAnimValue.GetUnit() == StyleAnimationValue::eUnit_Coord,
"'font-size' value with unexpected style unit");
aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
aPresContext->TextZoom());
}
return true;
}
static void
InvertSign(StyleAnimationValue& aValue)
{
switch (aValue.GetUnit()) {
case StyleAnimationValue::eUnit_Coord:
aValue.SetCoordValue(-aValue.GetCoordValue());
break;
case StyleAnimationValue::eUnit_Percent:
aValue.SetPercentValue(-aValue.GetPercentValue());
break;
case StyleAnimationValue::eUnit_Float:
aValue.SetFloatValue(-aValue.GetFloatValue());
break;
default:
NS_NOTREACHED("Calling InvertSign with an unsupported unit");
break;
}
}