private void RenderTextPath(SvgTextContentElement element, WpfPathTextBuilder pathBuilder,
string text, Point origin, double rotate, WpfTextPlacement placement)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
WpfSvgPaint fillPaint = new WpfSvgPaint(_context, element, "fill");
WpfSvgPaint strokePaint = new WpfSvgPaint(_context, element, "stroke");
Brush textBrush = fillPaint.GetBrush();
Pen textPen = strokePaint.GetPen();
if (textBrush == null && textPen == null)
{
return;
}
double emSize = GetComputedFontSize(element);
var fontFamilyInfo = GetTextFontFamilyInfo(element);
WpfTextStringFormat stringFormat = GetTextStringFormat(element);
// Fix the use of Postscript fonts...
WpfFontFamilyVisitor fontFamilyVisitor = _context.FontFamilyVisitor;
if (!string.IsNullOrWhiteSpace(_actualFontName) && fontFamilyVisitor != null)
{
WpfFontFamilyInfo familyInfo = fontFamilyVisitor.Visit(_actualFontName,
fontFamilyInfo, _context);
if (familyInfo != null && !familyInfo.IsEmpty)
{
fontFamilyInfo = familyInfo;
}
}
// Create the text builder object defined by the font family information
WpfTextBuilder textBuilder = WpfTextBuilder.Create(fontFamilyInfo, this.TextCulture, emSize);
textBuilder.TextDecorations = GetTextDecoration(element);
textBuilder.TextAlignment = stringFormat.Alignment;
// This is character-by-character placement, text-alignment will distort the view...
textBuilder.TextAlignment = TextAlignment.Left;
// Create the path-run information holder for this render request...
WpfPathTextRun textPathRun = new WpfPathTextRun(element, textBuilder);
// Finally, register the path-run with path builder...
pathBuilder.AddTextRun(textPathRun, text, origin, textBrush, textPen);
}
public void AddTextRun(WpfPathTextRun pathTextRun, string text, Point textPos, Brush textBrush, Pen textPen)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
if (_pathChars == null)
{
_pathChars = new List <WpfPathChar>();
}
if (_endsWhitespace)
{
text = text.TrimStart();
_endsWhitespace = text.EndsWith(" ", StringComparison.OrdinalIgnoreCase);
}
else
{
_endsWhitespace = text.EndsWith(" ", StringComparison.OrdinalIgnoreCase);
}
pathTextRun.Initialize(text, textBrush, textPen);
pathTextRun.SetPosition(textPos, _textPathElement, _textElement);
WpfTextBuilder contentBuilder = pathTextRun.Builder;
SvgTextContentElement contentElement = pathTextRun.Element;
foreach (char ch in text)
{
var textChar = ch.ToString();
var textSize = contentBuilder.MeasureText(contentElement, textChar, true);
_textLength += textSize.Width;
_pathChars.Add(new WpfPathChar(textChar, textPos, textSize, _pathTextRuns.Count));
}
_pathTextRuns.Add(pathTextRun);
}