static ICharSequence EndTruncatedFormattedIter(F9PFormattedString baseFormattedString, TextPaint paint, int secondToLastEnd, int start, int endLow, int endHigh, float availWidth)
{
if (endHigh - endLow <= 1)
{
return(baseFormattedString.ToSpannableString(EllipsePlacement.End, secondToLastEnd, start, endLow));
}
int mid = (endLow + endHigh) / 2;
var formattedText = baseFormattedString.ToSpannableString(EllipsePlacement.End, 0, start, mid);
var layout = new StaticLayout(formattedText, paint, int.MaxValue - 10000, Android.Text.Layout.Alignment.AlignNormal, 1.0f, 0.0f, true);
if (layout.GetLineWidth(0) > availWidth)
{
return(EndTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, start, endLow, mid, availWidth));
}
return(EndTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, start, mid, endHigh, availWidth));
}
static ICharSequence MidTruncatedFormattedIter(F9PFormattedString baseFormattedString, TextPaint paint, int secondToLastEnd, int startLastVisible, int midLastVisible, int startLow, int startHigh, int end, float availWidth)
{
if (startHigh - startLow <= 1)
{
return(baseFormattedString.ToSpannableString(EllipsePlacement.Mid, secondToLastEnd, startHigh, end, startLastVisible, midLastVisible));
}
int mid = (startLow + startHigh) / 2;
var formattedText = baseFormattedString.ToSpannableString(EllipsePlacement.Mid, 0, mid, end, startLastVisible, midLastVisible);
var layout = TextExtensions.StaticLayout(formattedText, paint, int.MaxValue - 10000, Android.Text.Layout.Alignment.AlignNormal, 1.0f, 0.0f, true);
if (layout.GetLineWidth(0) > availWidth)
{
return(MidTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, startLastVisible, midLastVisible, mid, startHigh, end, availWidth));
}
return(MidTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, startLastVisible, midLastVisible, startLow, mid, end, availWidth));
}
static ICharSequence StartTruncatedFormattedIter(F9PFormattedString baseFormattedString, TextPaint paint, int secondToLastEnd, int startLow, int startHigh, int end, float availWidth, float lineHeightMultiplier)
{
if (startHigh - startLow <= 1)
{
return(baseFormattedString.ToSpannableString(EllipsePlacement.Start, secondToLastEnd, startHigh, end));
}
int mid = (startLow + startHigh) / 2;
var formattedText = baseFormattedString.ToSpannableString(EllipsePlacement.Start, 0, mid, end);
using (var layout = TextExtensions.StaticLayout(formattedText, paint, int.MaxValue - 10000, Android.Text.Layout.Alignment.AlignNormal, lineHeightMultiplier, 0.0f, true))
{
if (layout.GetLineWidth(0) > availWidth)
{
return(StartTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, mid, startHigh, end, availWidth, lineHeightMultiplier));
}
return(StartTruncatedFormattedIter(baseFormattedString, paint, secondToLastEnd, startLow, mid, end, availWidth, lineHeightMultiplier));
}
}
//bool _truncating;
internal static StaticLayout Truncate(string text, F9PFormattedString baseFormattedString, TextPaint paint, int availWidth, int availHeight, AutoFit fit, LineBreakMode lineBreakMode, ref int lines, ref ICharSequence textFormatted)
{
StaticLayout layout = null;
var fontMetrics = paint.GetFontMetrics();
var fontLineHeight = fontMetrics.Descent - fontMetrics.Ascent;
var fontLeading = System.Math.Abs(fontMetrics.Bottom - fontMetrics.Descent);
textFormatted = ((ICharSequence)baseFormattedString?.ToSpannableString()) ?? new Java.Lang.String(text);
if (lines > 0)
{
if (baseFormattedString != null)
{
layout = new StaticLayout(textFormatted, paint, availWidth, Android.Text.Layout.Alignment.AlignNormal, 1.0f, 0.0f, true);
if (layout.Height > availHeight)
{
var visibleLines = (int)((fontLeading + availHeight) / (fontLineHeight + fontLeading));
if (visibleLines < lines)
{
lines = visibleLines;
}
}
if (layout.LineCount > lines && lines > 0)
{
var secondToLastEnd = lines > 1 ? layout.GetLineEnd(lines - 2) : 0;
var start = lines > 1 ? layout.GetLineStart(layout.LineCount - 2) : 0;
switch (lineBreakMode)
{
case LineBreakMode.HeadTruncation:
textFormatted = StartTruncatedFormatted(baseFormattedString, paint, secondToLastEnd, start, layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
case LineBreakMode.MiddleTruncation:
textFormatted = MidTruncatedFormatted(baseFormattedString, paint, secondToLastEnd, layout.GetLineStart(lines - 1), (layout.GetLineEnd(lines - 1) + layout.GetLineStart(lines - 1)) / 2 - 1, start, layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
case LineBreakMode.TailTruncation:
textFormatted = EndTruncatedFormatted(baseFormattedString, paint, secondToLastEnd, layout.GetLineStart(lines - 1), layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
default:
//textFormatted = baseFormattedString.ToSpannableString(EllipsePlacement.None, 0, 0, layout.GetLineEnd(lines - 1));
textFormatted = TruncatedFormatted(baseFormattedString, paint, secondToLastEnd, layout.GetLineStart(lines - 1), layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
}
}
}
else
{
layout = new StaticLayout(text, paint, availWidth, Android.Text.Layout.Alignment.AlignNormal, 1.0f, 0.0f, true);
if (layout.Height > availHeight)
{
var visibleLines = (int)((fontLeading + availHeight) / (fontLineHeight + fontLeading));
if (visibleLines < lines)
{
lines = visibleLines;
}
}
if (layout.LineCount > lines && lines > 0)
{
var secondToLastEnd = lines > 1 ? layout.GetLineEnd(lines - 2) : 0;
var start = lines > 1 ? layout.GetLineStart(layout.LineCount - 2) : 0;
switch (lineBreakMode)
{
case LineBreakMode.HeadTruncation:
text = StartTruncatedLastLine(text, paint, secondToLastEnd, start, layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
case LineBreakMode.MiddleTruncation:
text = MidTruncatedLastLine(text, paint, secondToLastEnd, layout.GetLineStart(lines - 1), (layout.GetLineEnd(lines - 1) + layout.GetLineStart(lines - 1)) / 2 - 1, start, layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
case LineBreakMode.TailTruncation:
text = EndTruncatedLastLine(text, paint, secondToLastEnd, layout.GetLineStart(lines - 1), layout.GetLineEnd(layout.LineCount - 1), availWidth);
break;
default:
text = text.Substring(0, layout.GetLineEnd(lines - 1));
break;
}
textFormatted = new Java.Lang.String(text);
}
}
}
return(new StaticLayout(textFormatted, paint, availWidth, Android.Text.Layout.Alignment.AlignNormal, 1.0f, 0.0f, true));
}