// TODO: DEVSIX-4136 opacity is not supported now.
// The opacity should be equal to 'parentOpacity * stopRenderer.getStopOpacity() * stopColor[3]'
private IList <GradientColorStop> ParseStops(float parentOpacity)
{
IList <GradientColorStop> stopsList = new List <GradientColorStop>();
foreach (StopSvgNodeRenderer stopRenderer in GetChildStopRenderers())
{
float[] stopColor = stopRenderer.GetStopColor();
double offset = stopRenderer.GetOffset();
stopsList.Add(new GradientColorStop(stopColor, offset, GradientColorStop.OffsetType.RELATIVE));
}
if (!stopsList.IsEmpty())
{
GradientColorStop firstStop = stopsList[0];
if (firstStop.GetOffset() > 0)
{
stopsList.Add(0, new GradientColorStop(firstStop, 0f, GradientColorStop.OffsetType.RELATIVE));
}
GradientColorStop lastStop = stopsList[stopsList.Count - 1];
if (lastStop.GetOffset() < 1)
{
stopsList.Add(new GradientColorStop(lastStop, 1f, GradientColorStop.OffsetType.RELATIVE));
}
}
return(stopsList);
}
private static void AddStopColors(AbstractLinearGradientBuilder builder, IList <String> argumentsList, int
stopsStartIndex, float emValue, float remValue)
{
GradientColorStop lastCreatedStopColor = null;
int lastStopIndex = argumentsList.Count - 1;
for (int i = stopsStartIndex; i <= lastStopIndex; ++i)
{
String argument = argumentsList[i];
IList <String> elementsList = new List <String>();
CssDeclarationValueTokenizer tokenizer = new CssDeclarationValueTokenizer(argument);
CssDeclarationValueTokenizer.Token nextToken;
while ((nextToken = tokenizer.GetNextValidToken()) != null)
{
elementsList.Add(nextToken.GetValue());
}
// cases: color, color + offset, color + offset + offset, offset (hint)
if (elementsList.IsEmpty() || elementsList.Count > 3)
{
throw new StyledXMLParserException(MessageFormatUtil.Format(StyledXMLParserException.INVALID_GRADIENT_COLOR_STOP_VALUE
, argument));
}
if (CssUtils.IsColorProperty(elementsList[0]))
{
float[] rgba = CssUtils.ParseRgbaColor(elementsList[0]);
if (elementsList.Count == 1)
{
UnitValue offset = i == stopsStartIndex ? new UnitValue(UnitValue.PERCENT, 0f) : i == lastStopIndex ? new
UnitValue(UnitValue.PERCENT, 100f) : null;
lastCreatedStopColor = CreateStopColor(rgba, offset);
builder.AddColorStop(lastCreatedStopColor);
}
else
{
for (int j = 1; j < elementsList.Count; ++j)
{
if (CssUtils.IsNumericValue(elementsList[j]))
{
// the numeric value is invalid in linear gradient function.
// So check it here as parsing method will use the default pt metric
throw new StyledXMLParserException(MessageFormatUtil.Format(StyledXMLParserException.INVALID_GRADIENT_COLOR_STOP_VALUE
, argument));
}
UnitValue offset = CssUtils.ParseLengthValueToPt(elementsList[j], emValue, remValue);
if (offset == null)
{
throw new StyledXMLParserException(MessageFormatUtil.Format(StyledXMLParserException.INVALID_GRADIENT_COLOR_STOP_VALUE
, argument));
}
lastCreatedStopColor = CreateStopColor(rgba, offset);
builder.AddColorStop(lastCreatedStopColor);
}
}
}
else
{
// it should be a color hint case
if (elementsList.Count != 1 || lastCreatedStopColor == null || lastCreatedStopColor.GetHintOffsetType() !=
GradientColorStop.HintOffsetType.NONE || i == lastStopIndex)
{
// hint is not a single value, or no color at the beginning,
// or two hints in a row, or hint as a last value
throw new StyledXMLParserException(MessageFormatUtil.Format(StyledXMLParserException.INVALID_GRADIENT_COLOR_STOP_VALUE
, argument));
}
UnitValue hint = CssUtils.ParseLengthValueToPt(elementsList[0], emValue, remValue);
if (hint == null)
{
throw new StyledXMLParserException(MessageFormatUtil.Format(StyledXMLParserException.INVALID_GRADIENT_COLOR_STOP_VALUE
, argument));
}
if (hint.GetUnitType() == UnitValue.PERCENT)
{
lastCreatedStopColor.SetHint(hint.GetValue() / 100, GradientColorStop.HintOffsetType.RELATIVE_ON_GRADIENT);
}
else
{
lastCreatedStopColor.SetHint(hint.GetValue(), GradientColorStop.HintOffsetType.ABSOLUTE_ON_GRADIENT);
}
}
}
}
