protected override IEnumerable <CGeometry> MeasureOverride(
double entireWidth,
double remainWidth)
{
var creator = new LayoutCreateor(
FontFamily,
FontStyle,
FontWeight,
FontSize);
yield return(new LineBreakMarkGeometry(this, creator.Create("Ty", Foreground)));
}
protected override IEnumerable <CGeometry> MeasureOverride(
double entireWidth,
double remainWidth)
{
var creator = new LayoutCreateor(
FontFamily,
FontStyle,
FontWeight,
FontSize);
SingleTextLayoutGeometry NewGeometry(string text, bool linebreak)
=> new SingleTextLayoutGeometry(this, creator.Create(text, Foreground), creator.Create, TextVerticalAlignment, text, linebreak);
SingleTextLayoutGeometry NewGeometry2(string text, bool linebreak, double width)
=> new SingleTextLayoutGeometry(this, creator.Create(text, Foreground, width), creator.WithConstraint(width), TextVerticalAlignment, text, linebreak);
if (String.IsNullOrEmpty(Text))
{
yield break;
}
string entireText = Text;
if (remainWidth != entireWidth)
{
/*
* It is hacking-resolution for 'line breaking rules'.
*
* insert one space in the head to detect the line break position
* | | | |
* | xxxxxx xxxxxx | rather than | xxxxxx xxxxxx internat |
* | internationalization | | ionalization |
* | | | |
*/
var firstTxtLen =
creator.Create(" " + entireText, Foreground, remainWidth)
.TextLines.First().TextRange.Length;
firstTxtLen = Math.Max(firstTxtLen - 1, 0);
if (firstTxtLen > 0)
{
var firstText = entireText.Substring(0, firstTxtLen);
entireText = entireText.Substring(firstTxtLen);
yield return(NewGeometry(firstText, entireText != ""));
}
else
{
yield return(new LineBreakMarkGeometry(this));
}
if (String.IsNullOrEmpty(entireText))
{
yield break;
}
}
var midlayout = creator.Create(entireText, Foreground, entireWidth);
if (midlayout.TextLines.Count >= 2)
{
//var lastStart = midlayout.TextLines.Last().TextRange.Start;
//
//var midTxt = entireText.Substring(0, lastStart);
//var lstTxt = entireText.Substring(lastStart);
//yield return NewGeometry2(midTxt, true, entireWidth);
//yield return NewGeometry(lstTxt, false);
var ranges = midlayout.TextLines.Select(ln => ln.TextRange).ToArray();
var lastRange = ranges[ranges.Length - 1];
foreach (var range in ranges)
{
var line = entireText.Substring(range.Start, range.Length);
yield return(NewGeometry(line, !range.Equals(lastRange)));
}
}
else
{
yield return(new SingleTextLayoutGeometry(
this,
midlayout,
creator.Create,
TextVerticalAlignment,
entireText,
false));
}
}
