public virtual object Clone()
{
var tm = new TextMeasurement();
tm.CopyFrom(this);
return(tm);
}
static TextMeasurement charRectangle(this IntPtr hdc, string text, Rectangle container,
string wholeText = null, Point?point = null, bool adjustByPoint = false, DrawTextFlags?flags = null)
{
if (string.IsNullOrEmpty(text))
{
return(TextMeasurement.Default);
}
TextMeasurement measurement = new TextMeasurement();
Rectangle textBound;
wholeText = (wholeText ?? text);
var location = container.Location;
var measureWholeText = point == null;
measurement.UserPoint = point ?? Point.Empty;
textBound = hdc.textBound(wholeText, container, flags: flags);
var rect = textBound;
var p = point ?? new Point(container.Right, container.Y);
if (!measureWholeText)
{
if (p.X > textBound.Right)
{
p.X = textBound.Right;
}
else if (p.X < textBound.Left)
{
p.X = textBound.X;
}
}
var charIndex = 0;
var result = hdc.charRectangle(text, ref p, rect, flags, measureWholeText);
charIndex = Math.Max(0, result.Item2);
var rectangles = result.Item1;
measurement.Bounds = rectangles[0];
measurement.TextBounds = (measureWholeText) ? rectangles[1] : textBound;
rectangles[1] = measurement.TextBounds;
if (!measureWholeText && adjustByPoint && charIndex > 0)
{
float middle = (float)measurement.Bounds.Left +
measurement.Bounds.Width / 2;
if (p.X > middle - 1)
{
Rectangle r;
Dimension r1 = measurement.TextBounds;
var newresult = hdc.charBound(text, charIndex + 2, ref r1,
(int)flags.getMeasureFlag(false), out r);
if (!newresult.Equals(measurement.Bounds) &&
newresult.X > measurement.Bounds.X)
{
charIndex++;
measurement.Bounds = newresult;
}
}
}
if (measurement.Bounds.Size.Width <= 0)
{
measurement.Bounds = new Rectangle(measurement.Bounds.Location, new Size(2, 2));
}
measurement.CharIndex = charIndex;
measurement.Char = '\0';
measurement.Char = text[Math.Min(charIndex, text.Length - 1)];
return(measurement);
}
