public TextMeasureKey(string text, Font font, int maxWidth, API.Alignment alignment)
{
Text = text;
Font = font;
MaxWidth = maxWidth;
Alignment = alignment;
}
public static StringFormat GetFormat(this API.Alignment alignment, bool wrap)
{
if (!wrap)
{
return(StringFormat.GenericTypographic);
}
switch (alignment)
{
case API.Alignment.BottomCenter:
case API.Alignment.MiddleCenter:
case API.Alignment.TopCenter:
return(_centerFormat);
case API.Alignment.BottomLeft:
case API.Alignment.MiddleLeft:
case API.Alignment.TopLeft:
return(_leftFormat);
case API.Alignment.BottomRight:
case API.Alignment.MiddleRight:
case API.Alignment.TopRight:
return(_rightFormat);
default:
throw new NotSupportedException(alignment.ToString());
}
}
public static System.Drawing.SizeF Measure(this string text, Font font, API.Alignment alignment, int maxWidth = int.MaxValue)
{
try
{
var key = new TextMeasureKey(text, font, maxWidth, alignment);
var size = _measurements.GetOrAdd(key,
k =>
{
var format = alignment.GetFormat(maxWidth != int.MaxValue);
lock (DesktopBitmapTextDraw.GraphicsLocker)
{
return(_graphics.Value.MeasureString(k.Text, k.Font, k.MaxWidth, format));
}
});
return(size);
}
catch (ObjectDisposedException)
{
return(SizeF.Empty);
}
}
