private TextMetrics GetRunMetrics(FullTextState textState, TextRun textRun, CharacterBufferRange chars)
{
if (textRun is TextCharacters)
{
var textChars = (TextCharacters)textRun;
var result = new TextMetrics();
var props = textChars.Properties;
var typeface = props.Typeface;
var ideal_emsize = TextFormatterImp.RealToIdeal(props.FontRenderingEmSize);
result._textAscent = (int)Math.Round(typeface.Baseline(ideal_emsize, Constants.DefaultIdealToReal, props.PixelsPerDip, _textFormattingMode));
result._textHeight = (int)Math.Round(typeface.LineSpacing(ideal_emsize, Constants.DefaultIdealToReal, props.PixelsPerDip, _textFormattingMode));
result._height = result._textHeight;
result._baselineOffset = result._textAscent;
// width calculation
var formatted = GetFormattedTextSymbols(textChars, chars, 0); // isSideways
result._textWidth = formatted.UnscaledWidth;
return(result);
}
else if (textRun is TextHidden)
{
var result = new TextMetrics();
// Default should be empty
return(result);
}
else
{
throw new NotImplementedException(String.Format("Managed.TextFormatting.FullTextLine.GetRunMetrics for {0}", textRun.GetType().FullName));
}
}
/// <summary>
/// Get distance from the start of main text to the end of marker
/// </summary>
/// <remarks>
/// Positive distance is filtered out. Marker overlapping the main text is not supported.
/// </remarks>
internal int GetMainTextToMarkerIdealDistance()
{
if (_markerStore != null)
{
return(Math.Min(0, TextFormatterImp.RealToIdeal(_markerStore.Pap.TextMarkerProperties.Offset) - _store.Settings.TextIndent));
}
return(0);
}
/// <summary>
/// Constructing paragraph properties
/// </summary>
/// <param name="formatter">Text formatter</param>
/// <param name="paragraphProperties">paragraph properties</param>
/// <param name="optimalBreak">produce optimal break</param>
internal ParaProp(
TextFormatterImp formatter,
TextParagraphProperties paragraphProperties,
bool optimalBreak
)
{
_paragraphProperties = paragraphProperties;
_emSize = TextFormatterImp.RealToIdeal(paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize);
_indent = TextFormatterImp.RealToIdeal(paragraphProperties.Indent);
_paragraphIndent = TextFormatterImp.RealToIdeal(paragraphProperties.ParagraphIndent);
_height = TextFormatterImp.RealToIdeal(paragraphProperties.LineHeight);
if (_paragraphProperties.FlowDirection == FlowDirection.RightToLeft)
{
_statusFlags |= StatusFlags.Rtl;
}
if (optimalBreak)
{
_statusFlags |= StatusFlags.OptimalBreak;
}
}