private static NSMutableAttributedString RemoveTrailingNewLine(NSAttributedString htmlString)
{
NSAttributedString lastCharRange = htmlString.Substring(htmlString.Length - 1, 1);
if (lastCharRange.Value == "\n")
{
htmlString = htmlString.Substring(0, htmlString.Length - 1);
}
return(new NSMutableAttributedString(htmlString));
}
internal static NSMutableAttributedString RemoveTrailingNewLines(this NSAttributedString htmlString)
{
var count = 0;
for (int i = 1; i <= htmlString.Length; i++)
{
if ("\n" != htmlString.Substring(htmlString.Length - i, 1).Value)
{
break;
}
count++;
}
if (count > 0)
{
htmlString = htmlString.Substring(0, htmlString.Length - count);
}
return(new NSMutableAttributedString(htmlString));
}
public static IEnumerable <ISpan> AsSpans(this NSAttributedString text, int cursorPosition)
{
var start = 0;
bool queryTextSpanAlreadyUsed = false;
while (start != text.Length)
{
var attributes = text.GetAttributes(start, out var longestEffectiveRange, new NSRange(start, text.Length - start));
var length = (int)longestEffectiveRange.Length;
var end = start + length;
if (attributes.ContainsKey(ProjectId))
{
var(projectId, projectName, projectColor, taskId, taskName) = attributes.GetProjectInformation();
yield return(new ProjectSpan(projectId, projectName, projectColor, taskId, taskName));
}
else if (attributes.ContainsKey(TagId))
{
var(tagId, tagName) = attributes.GetTagInformation();
yield return(new TagSpan(tagId, tagName));
}
else if (length > 0)
{
var subText = text.Substring(start, length).ToString().Substring(0, length);
if (queryTextSpanAlreadyUsed == false && cursorPosition.IsInRange(start, end))
{
queryTextSpanAlreadyUsed = true;
yield return(new QueryTextSpan(subText, cursorPosition - start));
}
else
{
yield return(new TextSpan(subText));
}
}
start = end;
}
}
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);
}
