static void
SampleValue(float aPortion, Animation& aAnimation, nsStyleAnimation::Value& aStart,
nsStyleAnimation::Value& aEnd, Animatable* aValue)
{
nsStyleAnimation::Value interpolatedValue;
NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() ||
aStart.GetUnit() == nsStyleAnimation::eUnit_None ||
aEnd.GetUnit() == nsStyleAnimation::eUnit_None, "Must have same unit");
nsStyleAnimation::Interpolate(aAnimation.property(), aStart, aEnd,
aPortion, interpolatedValue);
if (aAnimation.property() == eCSSProperty_opacity) {
*aValue = interpolatedValue.GetFloatValue();
return;
}
nsCSSValueList* interpolatedList = interpolatedValue.GetCSSValueListValue();
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 mozOrigin = data.mozOrigin();
mozOrigin.x = mozOrigin.x * cssPerDev;
mozOrigin.y = mozOrigin.y * cssPerDev;
gfxPoint3D perspectiveOrigin = data.perspectiveOrigin();
perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev;
perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev;
nsDisplayTransform::FrameTransformProperties props(interpolatedList,
mozOrigin,
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(transform));
*aValue = functions;
}
// Helper function to parse a string into a nsStyleAnimation::Value
static bool
ValueFromStringHelper(nsCSSProperty aPropID,
Element* aTargetElement,
nsPresContext* aPresContext,
const nsAString& aString,
nsStyleAnimation::Value& 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;
PRUint32 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) {
PRInt32 absValuePos = nsSMILParserUtils::CheckForNegativeNumber(aString);
if (absValuePos > 0) {
isNegative = true;
subStringBegin = (PRUint32)absValuePos; // Start parsing after '-' sign
}
}
nsDependentSubstring subString(aString, subStringBegin);
if (!nsStyleAnimation::ComputeValue(aPropID, aTargetElement, 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
NS_ABORT_IF_FALSE(aStyleAnimValue.GetUnit() ==
nsStyleAnimation::eUnit_Coord,
"'font-size' value with unexpected style unit");
aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
aPresContext->TextZoom());
}
return true;
}
// Helper function to parse a string into a nsStyleAnimation::Value
static PRBool
ValueFromStringHelper(nsCSSProperty aPropID,
nsIContent* aTargetElement,
nsPresContext* aPresContext,
const nsAString& aString,
nsStyleAnimation::Value& aStyleAnimValue)
{
// 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.)
PRBool isNegative = PR_FALSE;
PRUint32 subStringBegin = 0;
PRInt32 absValuePos = nsSMILParserUtils::CheckForNegativeNumber(aString);
if (absValuePos > 0) {
isNegative = PR_TRUE;
subStringBegin = (PRUint32)absValuePos; // Start parsing after '-' sign
}
nsDependentSubstring subString(aString, subStringBegin);
if (!nsStyleAnimation::ComputeValue(aPropID, aTargetElement, subString,
PR_TRUE, aStyleAnimValue)) {
return PR_FALSE;
}
if (isNegative) {
InvertSign(aStyleAnimValue);
}
if (aPropID == eCSSProperty_font_size) {
// Divide out text-zoom, since SVG is supposed to ignore it
NS_ABORT_IF_FALSE(aStyleAnimValue.GetUnit() ==
nsStyleAnimation::eUnit_Coord,
"'font-size' value with unexpected style unit");
aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
aPresContext->TextZoom());
}
return PR_TRUE;
}
static void
InvertSign(nsStyleAnimation::Value& aValue)
{
switch (aValue.GetUnit()) {
case nsStyleAnimation::eUnit_Coord:
aValue.SetCoordValue(-aValue.GetCoordValue());
break;
case nsStyleAnimation::eUnit_Percent:
aValue.SetPercentValue(-aValue.GetPercentValue());
break;
case nsStyleAnimation::eUnit_Float:
aValue.SetFloatValue(-aValue.GetFloatValue());
break;
default:
NS_NOTREACHED("Calling InvertSign with an unsupported unit");
break;
}
}