/// <summary>
/// Background task work method.
/// </summary>
private void DoPrepareSvg(object sender, DoWorkEventArgs e)
{
// Lock to allow only one of these operations at a time.
lock (_updateLock)
{
KanjiDao dao = new KanjiDao();
// Get the kanji strokes.
KanjiStrokes strokes = dao.GetKanjiStrokes(_kanjiEntity.DbKanji.ID);
if (strokes != null && strokes.FramesSvg.Length > 0)
{
// If the strokes was successfuly retrieved, we have to read the compressed SVG contained inside.
string svgString = StringCompressionHelper.Unzip(strokes.FramesSvg);
StrokesCount = Regex.Matches(svgString, "<circle").Count;
DispatcherHelper.Invoke(() =>
{
StrokesImage = new Avalonia.Svg.Skia.SvgImage
{
Source = new SvgSource {
Picture = new SKSvg().FromSvg(svgString)
}
};
SetCurrentStroke(1);
});
}
}
}
/// <summary>
/// Background task work method.
/// </summary>
private void DoPrepareSvg(object sender, DoWorkEventArgs e)
{
// Lock to allow only one of these operations at a time.
lock (_updateLock)
{
KanjiDao dao = new KanjiDao();
// Get the kanji strokes.
KanjiStrokes strokes = dao.GetKanjiStrokes(_kanjiEntity.DbKanji.ID);
if (strokes != null && strokes.FramesSvg.Length > 0)
{
// If the strokes was successfuly retrieved, we have to read the compressed SVG contained inside.
SharpVectors.Renderers.Wpf.WpfDrawingSettings settings = new SharpVectors.Renderers.Wpf.WpfDrawingSettings();
using (FileSvgReader r = new FileSvgReader(settings))
{
// Unzip the stream and remove instances of "px" that are problematic for SharpVectors.
string svgString = StringCompressionHelper.Unzip(strokes.FramesSvg);
svgString = svgString.Replace("px", string.Empty);
StrokesCount = Regex.Matches(svgString, "<circle").Count;
using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(svgString)))
{
// Then read the stream to a DrawingGroup.
// We are forced to do this operation on the UI thread because DrawingGroups must
// be always manipulated by the same thread.
DispatcherHelper.Invoke(() =>
{
StrokesDrawingGroup = r.Read(stream);
SetCurrentStroke(1);
});
}
}
}
}
}
/// <summary>
/// Attempts to retrieve the kanji strokes SVG matching the given kanji inside the zip file.
/// </summary>
/// <param name="k">Target kanji.</param>
/// <returns>A kanji strokes entity, never null, that contains either the retrieved data or an
/// empty byte array when the entry was not found.</returns>
private KanjiStrokes RetrieveSvg(KanjiEntity k)
{
KanjiStrokes strokes = new KanjiStrokes();
strokes.FramesSvg = new byte[0];
if (!k.UnicodeValue.HasValue)
{
return(strokes);
}
ZipArchive svgZip = GetSvgZipArchive();
string entryName = string.Format("{0}_frames.svg", k.UnicodeValue.Value);
ZipArchiveEntry entry = svgZip.GetEntry(entryName);
if (entry != null)
{
using (Stream stream = entry.Open())
{
strokes.FramesSvg = StringCompressionHelper.Zip(StreamHelper.ReadToEnd(stream));
StringCompressionHelper.Unzip(strokes.FramesSvg);
}
}
return(strokes);
}