DomException when loading SVG file - doubts about the correctness of parsing the font-face rule

[Sarnapa]

Hi,

I have the following problem related to this simple code, which has the task of loading a given SVG file as an object of type DrawingGroup. I care that the texts contained in the given SVG file are not geometries.

Mentioned fragment of code:

var settings = new WpfDrawingSettings
{
IncludeRuntime = true,
TextAsGeometry = false
};

var converter = new FileSvgReader(settings);
return converter.Read(svgFilePath);

During its execution for the example SVG file, I got such an exception:

[DomException]
    Code: SyntaxErr
    Message: Style declaration ending bracket missing
    HelpLink: [null]
    Source: SharpVectors.Css

----------------------------------------------------------------------------------------------------------------------------------
Stack trace:
   at SharpVectors.Dom.Css.CssStyleDeclaration.ParseString(String cssText)
   at SharpVectors.Dom.Css.CssFontFaceRule.Parse(String& css, Object parent, Boolean readOnly, IList`1 replacedStrings, CssStyleSheetType origin)
   at SharpVectors.Dom.Css.CssRuleList.TryParse(String& css, Object parent, Boolean readOnly, IList`1 replacedStrings, CssStyleSheetType origin)
   at SharpVectors.Dom.Css.CssRuleList.Parse(String& css, Object parent, Boolean readOnly, IList`1 replacedStrings, CssStyleSheetType origin)
   at SharpVectors.Dom.Css.CssStyleSheet.get_CssRules()
   at SharpVectors.Dom.Svg.SvgDocument.GetFontUrl(CssStyleSheet cssSheet, IList`1 fontUrls, IDictionary`2 styledFontIds)
   at SharpVectors.Dom.Svg.SvgDocument.GetFontUrls()
   at SharpVectors.Dom.Svg.SvgDocument.OnLoaded()
   at SharpVectors.Dom.Css.CssXmlDocument.Load(XmlReader reader)
   at SharpVectors.Dom.Svg.SvgDocument.Load(String filename)
   at SharpVectors.Renderers.Utils.WpfSvgWindow.LoadDocument(Uri documentUri, WpfDrawingSettings drawingSettings)
   at SharpVectors.Converters.FileSvgReader.LoadFile(String fileName)

It looks to me that we have a problem here with loading custom fonts defined with the css rule font-face. I found only one such case in my file. I have included the definition of this font below:

<style type="text/css">
<![CDATA[@font-face{font-family:"MicrosoftSansSerif";src:url("data:application/font-woff;charset=utf-8;base64,<stream of bytes, which I had to shorten because the post was too long>")}]]>
</style>

It seems to me that the given font-face rule is well defined (according to what I write here). For that, I have doubts about the parsing in the method CssStyleDeclaration.ParseString(String cssText). Can you please analyze the correctness of this method?

Sample SVG file attached.

[paulushub]

@Sarnapa Sorry, you have hit a missing code. The embedded URL matching regular expression failed, and the else block was left empty for lack of use case.
You can see

SharpVectors/Source/SharpVectorCss/Css/CssStyleDeclaration.cs

Line 359 in 59aef84

I will now try to improve that code with your sample - sorry for the inconvenience.