/// <summary>
/// Creates a shaped symbol.
/// </summary>
/// <param name="textRun">The symbol run to shape.</param>
/// <param name="flowDirection">The flow direction.</param>
/// <returns>
/// The shaped symbol.
/// </returns>
internal static ShapedTextCharacters CreateSymbol(TextRun textRun, FlowDirection flowDirection)
{
var textShaper = TextShaper.Current;
var glyphTypeface = textRun.Properties !.Typeface.GlyphTypeface;
var fontRenderingEmSize = textRun.Properties.FontRenderingEmSize;
var cultureInfo = textRun.Properties.CultureInfo;
var shapedBuffer = textShaper.ShapeText(textRun.Text, glyphTypeface, fontRenderingEmSize, cultureInfo, (sbyte)flowDirection);
return(new ShapedTextCharacters(shapedBuffer, textRun.Properties));
}
public bool MoveNext()
{
Current = _textSource.GetTextRun(_pos);
if (Current is null)
{
return(false);
}
if (Current.TextSourceLength == 0)
{
return(false);
}
_pos += Current.TextSourceLength;
return(!(Current is TextEndOfLine));
}
private static bool TryGetLineBreak(TextRun textRun, out LineBreak lineBreak)
{
lineBreak = default;
if (textRun.Text.IsEmpty)
{
return(false);
}
var lineBreakEnumerator = new LineBreakEnumerator(textRun.Text);
while (lineBreakEnumerator.MoveNext())
{
if (!lineBreakEnumerator.Current.Required)
{
continue;
}
lineBreak = lineBreakEnumerator.Current;
if (lineBreak.PositionWrap >= textRun.Text.Length)
{
return(true);
}
//The line breaker isn't treating \n\r as a pair so we have to fix that here.
if (textRun.Text[lineBreak.PositionMeasure] == '\n' &&
textRun.Text[lineBreak.PositionWrap] == '\r')
{
lineBreak = new LineBreak(lineBreak.PositionMeasure, lineBreak.PositionWrap + 1,
lineBreak.Required);
}
return(true);
}
return(false);
}
public TextRunDebuggerProxy(TextRun textRun)
{
_textRun = textRun;
}