private static string DetectTappedUrl(UIGestureRecognizer tap, UILabel control)
{
CGRect bounds = control.Bounds;
NSAttributedString attributedText = control.AttributedText;
// Setup containers
using var textContainer = new NSTextContainer(bounds.Size)
{
LineFragmentPadding = 0,
LineBreakMode = control.LineBreakMode,
MaximumNumberOfLines = (nuint)control.Lines
};
using var layoutManager = new NSLayoutManager();
layoutManager.AddTextContainer(textContainer);
using var textStorage = new NSTextStorage();
textStorage.SetString(attributedText);
using var fontAttributeName = new NSString("NSFont");
var textRange = new NSRange(0, control.AttributedText.Length);
textStorage.AddAttribute(fontAttributeName, control.Font, textRange);
textStorage.AddLayoutManager(layoutManager);
CGRect textBoundingBox = layoutManager.GetUsedRectForTextContainer(textContainer);
void ResetAttributes(NSColor foregroundColorOverride = null)
{
// clear user attributes
TextStorage.SetAttributes(new NSDictionary(), new NSRange(0, TextStorage.Length));
var r = new NSRange(0, Text.Length);
TextStorage.SetString(new NSAttributedString(Text));
TextStorage.SetAlignment(TextAlignment.ToNSTextAlignment(), r);
if (Font != null)
{
// set a global font
TextStorage.AddAttribute(NSStringAttributeKey.Font, Font, r);
}
// paragraph style
TextContainer.LineBreakMode = TextTrimming == TextTrimming.WordElipsis ? NSLineBreakMode.TruncatingTail : NSLineBreakMode.ByWordWrapping;
var pstyle = NSParagraphStyle.DefaultParagraphStyle.MutableCopy() as NSMutableParagraphStyle;
pstyle.Alignment = TextAlignment.ToNSTextAlignment();
if (TextTrimming == TextTrimming.WordElipsis)
{
pstyle.LineBreakMode = NSLineBreakMode.TruncatingTail;
}
TextStorage.AddAttribute(NSStringAttributeKey.ParagraphStyle, pstyle, r);
// set foreground color override
if (foregroundColorOverride != null)
{
TextStorage.AddAttribute(NSStringAttributeKey.ForegroundColor, foregroundColorOverride, r);
}
// restore user attributes
foreach (var att in Attributes)
{
AddAttributeInternal(att);
}
}
