static void
SampleValue(float aPortion, Animation& aAnimation, StyleAnimationValue& aStart,
StyleAnimationValue& aEnd, Animatable* aValue)
{
StyleAnimationValue interpolatedValue;
NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() ||
aStart.GetUnit() == StyleAnimationValue::eUnit_None ||
aEnd.GetUnit() == StyleAnimationValue::eUnit_None,
"Must have same unit");
StyleAnimationValue::Interpolate(aAnimation.property(), aStart, aEnd,
aPortion, interpolatedValue);
if (aAnimation.property() == eCSSProperty_opacity) {
*aValue = interpolatedValue.GetFloatValue();
return;
}
nsCSSValueSharedList* interpolatedList =
interpolatedValue.GetCSSValueSharedListValue();
TransformData& data = aAnimation.data().get_TransformData();
nsPoint origin = data.origin();
// we expect all our transform data to arrive in css pixels, so here we must
// adjust to dev pixels.
double cssPerDev = double(nsDeviceContext::AppUnitsPerCSSPixel())
/ double(data.appUnitsPerDevPixel());
gfxPoint3D transformOrigin = data.transformOrigin();
transformOrigin.x = transformOrigin.x * cssPerDev;
transformOrigin.y = transformOrigin.y * cssPerDev;
gfxPoint3D perspectiveOrigin = data.perspectiveOrigin();
perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev;
perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev;
nsDisplayTransform::FrameTransformProperties props(interpolatedList,
transformOrigin,
perspectiveOrigin,
data.perspective());
gfx3DMatrix transform =
nsDisplayTransform::GetResultingTransformMatrix(props, origin,
data.appUnitsPerDevPixel(),
&data.bounds());
gfxPoint3D scaledOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(origin.x, data.appUnitsPerDevPixel())),
NS_round(NSAppUnitsToFloatPixels(origin.y, data.appUnitsPerDevPixel())),
0.0f);
transform.Translate(scaledOrigin);
InfallibleTArray<TransformFunction> functions;
functions.AppendElement(TransformMatrix(ToMatrix4x4(transform)));
*aValue = functions;
}
// 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 */ bool
CommonAnimationManager::ExtractComputedValueForTransition(
nsCSSProperty aProperty,
nsStyleContext* aStyleContext,
StyleAnimationValue& aComputedValue)
{
bool result = StyleAnimationValue::ExtractComputedValue(aProperty,
aStyleContext,
aComputedValue);
if (aProperty == eCSSProperty_visibility) {
MOZ_ASSERT(aComputedValue.GetUnit() ==
StyleAnimationValue::eUnit_Enumerated,
"unexpected unit");
aComputedValue.SetIntValue(aComputedValue.GetIntValue(),
StyleAnimationValue::eUnit_Visibility);
}
return result;
}
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;
}
}