private void ReadRun()
{
TextAttributes attributes = new TextAttributes();
var start = ReadInt(XmlNames.Start, 0);
var length = ReadInt(XmlNames.Length, 0);
if (_reader.HasAttributes)
{
_reader.MoveToElement();
while (_reader.MoveToNextAttribute())
{
var attributeName = _reader.Name;
var attributeValue = _reader.Value;
if (!(XmlNames.Start.Equals(attributeName) || XmlNames.Length.Equals(attributeName)))
{
if (Enum.TryParse(attributeName, out TextAttribute key))
{
attributes[key] = attributeValue;
}
}
}
_reader.MoveToElement();
}
var run = new AttributedTextRun(start, length, attributes);
_runs.Add(run);
}
public static void Optimize(this List <IAttributedTextRun> runs, int textLength)
{
// Loop through the runs and make sure that they don't extend beyond the bounds of the text.
for (int i = 0; i < runs.Count; i++)
{
var run = runs[i];
var end = run.GetEnd();
if (run.Start < 0 || end > textLength)
{
var start = Math.Max(run.Start, 0);
var maxLength = textLength - start;
var length = Math.Min(run.Length, maxLength);
if (length > 0)
{
runs[i] = new AttributedTextRun(start, length, run.Attributes);
}
else
{
runs.RemoveAt(i--);
}
}
}
runs.Sort(AttributedTextRunComparer.Instance);
// Loop through the runs and join the ones that overlap.
IAttributedTextRun previous = null;
for (int i = 0; i < runs.Count; i++)
{
var run = runs[i];
if (previous != null)
{
if (previous.IntersectsExactly(run))
{
var combined = previous.Attributes.Union(run.Attributes);
run = runs[i - 1] = new AttributedTextRun(run.Start, run.Length, combined);
runs.RemoveAt(i--);
}
else if (previous.Intersects(run))
{
var intersections = previous.CalculatedIntersections(run);
runs.RemoveAt(i--);
runs.RemoveAt(i);
runs.InsertRange(i++, intersections);
run = runs[i];
runs.Sort(AttributedTextRunComparer.Instance);
}
}
previous = run;
}
}
private static bool HandleAttributes(
IList <IAttributedTextRun> runs,
TextWriter writer,
NSAttributedString target,
NSDictionary attrs,
NSRange range)
{
var text = target.Substring(range.Location, range.Length).Value;
var formatAttributes = new TextAttributes();
var run = new AttributedTextRun((int)range.Location, (int)range.Length, formatAttributes);
NSObject font;
if (attrs.TryGetValue(NSStringAttributeKey.Font, out font))
{
var actualFont = (NSFont)font;
#if __MACOS__
var fontName = actualFont.FontName;
#else
var fontName = actualFont.Name;
#endif
formatAttributes.SetFontSize((float)actualFont.PointSize);
if (!fontName.StartsWith(".", System.StringComparison.Ordinal))
{
formatAttributes.SetFontName(fontName);
}
else
{
if (fontName.Contains("Italic"))
{
formatAttributes.SetItalic(true);
}
if (fontName.Contains("Bold"))
{
formatAttributes.SetBold(true);
}
}
}
NSObject underline;
if (attrs.TryGetValue(NSStringAttributeKey.UnderlineStyle, out underline))
{
var number = underline as NSNumber;
if (number != null && number.Int32Value > 0)
{
formatAttributes.SetUnderline(true);
}
}
NSObject strikethrough;
if (attrs.TryGetValue(NSStringAttributeKey.StrikethroughStyle, out strikethrough))
{
var number = strikethrough as NSNumber;
if (number != null && number.Int32Value > 0)
{
formatAttributes.SetStrikethrough(true);
}
}
#if MONOMAC
NSObject superscript;
if (attrs.TryGetValue(NSStringAttributeKey.Superscript, out superscript))
{
var number = superscript as NSNumber;
if (number != null && number.Int32Value == -1)
{
formatAttributes.SetSubscript(true);
}
else if (number != null && number.Int32Value == 1)
{
formatAttributes.SetSuperscript(true);
}
}
#endif
NSObject color;
if (attrs.TryGetValue(NSStringAttributeKey.ForegroundColor, out color))
{
var colorObject = color as NSColor;
if (colorObject != null)
{
formatAttributes.SetForegroundColor(colorObject.ToHex());
}
}
NSObject backgroundColor;
if (attrs.TryGetValue(NSStringAttributeKey.BackgroundColor, out backgroundColor))
{
var colorObject = backgroundColor as NSColor;
if (colorObject != null)
{
formatAttributes.SetBackgroundColor(colorObject.ToHex());
}
}
#if MONOMAC
NSObject paragraphStyleAsObject;
if (attrs.TryGetValue(NSStringAttributeKey.ParagraphStyle, out paragraphStyleAsObject))
{
var paragraphStyle = (NSParagraphStyle)paragraphStyleAsObject;
if (paragraphStyle.TextLists != null && paragraphStyle.TextLists.Length > 0)
{
for (int i = 0; i < paragraphStyle.TextLists.Length; i++)
{
var textList = paragraphStyle.TextLists [i];
var markerFormat = textList.MarkerFormat;
if ("{hyphen}".Equals(textList.MarkerFormat))
{
formatAttributes.SetUnorderedList(true);
formatAttributes.SetMarker(MarkerType.Hyphen);
}
else
{
formatAttributes.SetUnorderedList(true);
formatAttributes.SetMarker(MarkerType.ClosedCircle);
}
}
}
}
#endif
if (run.Attributes.Count > 0)
{
runs.Add(run);
}
writer.Write(text);
return(false);
}