public Task <NSImage> LoadImageAsync(
ImageSource imagesource,
CancellationToken cancelationToken = default(CancellationToken),
float scale = 1f)
{
NSImage image = null;
var fontsource = imagesource as FontImageSource;
if (fontsource != null)
{
var font = NSFont.FromFontName(fontsource.FontFamily ?? string.Empty, (float)fontsource.Size) ??
NSFont.SystemFontOfSize((float)fontsource.Size);
var iconcolor = fontsource.Color.IsDefault ? _defaultColor : fontsource.Color;
var attString = new NSAttributedString(fontsource.Glyph, font: font, foregroundColor: iconcolor.ToNSColor());
var imagesize = ((NSString)fontsource.Glyph).StringSize(attString.GetAttributes(0, out _));
using (var context = new CGBitmapContext(IntPtr.Zero, (nint)imagesize.Width, (nint)imagesize.Height, 8, (nint)imagesize.Width * 4, NSColorSpace.GenericRGBColorSpace.ColorSpace, CGImageAlphaInfo.PremultipliedFirst))
{
using (var ctline = new CTLine(attString))
{
ctline.Draw(context);
}
using (var cgImage = context.ToImage())
{
image = new NSImage(cgImage, imagesize);
}
}
}
return(Task.FromResult(image));
}
public static NSMutableAttributedString ToMutable(this NSAttributedString attributedString, string text)
{
if (attributedString != null && attributedString.Length > 0)
{
NSRange range;
return(new NSMutableAttributedString(text, attributedString.GetAttributes(0, out range)));
}
return(new NSMutableAttributedString(text));
}
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;
}
}
