/// <summary>
/// Set the clipping of the group
/// </summary>
public static void SetClipPath(GraphicGroup group,
Matrix currentTransformationMatrix,
CssStyleCascade cssStyleCascade,
Dictionary <string, XElement> globalDefinitions)
{
var clipPath = cssStyleCascade.GetPropertyFromTop("clip-path");
if (string.IsNullOrEmpty(clipPath))
{
return;
}
if (!clipPath.StartsWith("url(", StringComparison.OrdinalIgnoreCase))
{
return;
}
int endUri = clipPath.IndexOf(")", StringComparison.OrdinalIgnoreCase);
var uri = clipPath.Substring(4, endUri - 4);
uri = uri.Trim();
var id = uri.Substring(1);
if (!globalDefinitions.ContainsKey(id))
{
return;
}
var clipElem = globalDefinitions[id];
// richt now we support only a single path for the clip geometry
var shapeElement = clipElem.Elements().First();
if (shapeElement == null)
{
return;
}
var clipGeometry = GeometryParser.Parse(shapeElement, currentTransformationMatrix);
clipGeometry.FillRule = GraphicFillRule.NoneZero;
var clipRule = cssStyleCascade.GetProperty("clip-rule");
if (!string.IsNullOrEmpty(clipRule))
{
switch (clipRule)
{
case "evenodd":
clipGeometry.FillRule = GraphicFillRule.EvenOdd;
break;
case "nonzero":
clipGeometry.FillRule = GraphicFillRule.NoneZero;
break;
}
}
group.Clip = clipGeometry;
}
/// <summary>
/// Get a double attribute from a length or percent from the cascade
/// </summary>
private double GetLengthPercentFromCascade(string attrName, double defaultValue)
{
double retVal;
var strVal = cssStyleCascade.GetProperty(attrName);
if (!string.IsNullOrEmpty(strVal))
{
retVal = doubleParser.GetLengthPercent(strVal, PercentBaseSelector.ViewBoxDiagonal);
}
else
{
retVal = defaultValue;
}
return(retVal);
}
/// <summary>
/// Get the font size
/// </summary>
private double GetFontSize()
{
var fontSizeStr = cssStyleCascade.GetProperty("font-size");
double fontSize = 16.0;
if (!string.IsNullOrEmpty(fontSizeStr))
{
fontSize = GetLengthPercent(fontSizeStr, PercentBaseSelector.ViewBoxDiagonal);
}
return(fontSize);
}