void LeftCopy(VisualPointInfo pointInfo, TextRangeCopy output)
{
if (pointInfo.LineId != _currentLineNumber)
{
throw new NotSupportedException();
}
Run tobeCutRun = pointInfo.Run;
if (tobeCutRun == null)
{
return;
}
foreach (Run run in _runs)
{
if (run != tobeCutRun)
{
output.AppendRun(run);
}
else
{
break;
}
}
CopyRun leftPart = tobeCutRun.LeftCopy(pointInfo.RunLocalSelectedIndex);
if (leftPart != null)
{
output.AppendRun(leftPart);
}
}
internal EditableVisualPointInfo Split(EditableVisualPointInfo pointInfo)
{
if (pointInfo.LineId != _currentLineNumber)
{
throw new NotSupportedException();
}
Run tobeCutRun = pointInfo.Run;
if (tobeCutRun == null)
{
return(CreateTextPointInfo(
pointInfo.LineId,
pointInfo.LineCharIndex,
pointInfo.X,
null,
pointInfo.TextRunCharOffset,
pointInfo.TextRunPixelOffset));
}
this.LocalSuspendLineReArrange();
EditableVisualPointInfo result = null;
CopyRun leftPart = tobeCutRun.LeftCopy(pointInfo.RunLocalSelectedIndex);
CopyRun rightPart = tobeCutRun.Copy(pointInfo.RunLocalSelectedIndex);
if (leftPart != null)
{
Run leftRun = AddBefore(tobeCutRun, leftPart);
if (rightPart != null)
{
this.AddAfter(tobeCutRun, rightPart);
}
result = CreateTextPointInfo(
pointInfo.LineId,
pointInfo.LineCharIndex,
pointInfo.X,
leftRun,
pointInfo.TextRunCharOffset,
pointInfo.TextRunPixelOffset);
}
else
{
if (rightPart != null)
{
this.AddAfter(tobeCutRun, rightPart);
}
Run infoTextRun = null;
if (IsSingleLine)
{
if (tobeCutRun.PrevRun != null)
{
infoTextRun = tobeCutRun.PrevRun;
}
else
{
infoTextRun = tobeCutRun.NextRun;
}
}
else
{
if (IsFirstLine)
{
if (tobeCutRun.PrevRun != null)
{
infoTextRun = tobeCutRun.PrevRun;
}
else
{
if (tobeCutRun.NextRun == null)
{
infoTextRun = null;
}
else
{
infoTextRun = tobeCutRun.NextRun;
}
}
}
else if (IsLastLine)
{
if (tobeCutRun.PrevRun != null)
{
infoTextRun = tobeCutRun.PrevRun;
}
else
{
}
}
else
{
if (tobeCutRun.NextRun != null)
{
infoTextRun = tobeCutRun.NextRun;
}
else
{
infoTextRun = null;
}
}
}
result = CreateTextPointInfo(
pointInfo.LineId,
pointInfo.LineCharIndex,
pointInfo.X,
infoTextRun,
pointInfo.TextRunCharOffset,
pointInfo.TextRunPixelOffset);
}
this.Remove(tobeCutRun);
this.LocalResumeLineReArrange();
return(result);
}
internal SelectionRangeInfo Split(VisualSelectionRange selectionRange)
{
selectionRange.SwapIfUnOrder();
EditableVisualPointInfo startPoint = selectionRange.StartPoint;
EditableVisualPointInfo endPoint = selectionRange.EndPoint;
if (startPoint.Run == endPoint.Run)
{
Run toBeCutTextRun = startPoint.Run;
CopyRun leftPart = toBeCutTextRun.LeftCopy(startPoint.RunLocalSelectedIndex);
CopyRun middlePart = toBeCutTextRun.Copy(startPoint.RunLocalSelectedIndex, endPoint.LineCharIndex - startPoint.LineCharIndex);
CopyRun rightPart = toBeCutTextRun.Copy(endPoint.RunLocalSelectedIndex);
EditableVisualPointInfo newStartRangePointInfo = null;
EditableVisualPointInfo newEndRangePointInfo = null;
TextLineBox line = this;
if (startPoint.LineId != _currentLineNumber)
{
line = _textFlowLayer.GetTextLine(startPoint.LineId);
}
line.LocalSuspendLineReArrange();
if (leftPart != null)
{
Run leftRun = line.AddBefore(toBeCutTextRun, leftPart);
newStartRangePointInfo = CreateTextPointInfo(
startPoint.LineId, startPoint.LineCharIndex, startPoint.X,
leftRun,
startPoint.TextRunCharOffset, startPoint.TextRunPixelOffset);
}
else
{
//no left part,
//so we connect to prev text run
Run prevTxtRun = startPoint.Run.PrevRun;
if (prevTxtRun != null)
{
newStartRangePointInfo = CreateTextPointInfo(
startPoint.LineId, startPoint.LineCharIndex, startPoint.X,
prevTxtRun,
startPoint.TextRunCharOffset - leftPart.CharacterCount,
startPoint.TextRunPixelOffset - prevTxtRun.Width);
}
else
{
//no prev run, we are at the begining of the line
newStartRangePointInfo = CreateTextPointInfo(
startPoint.LineId,
startPoint.LineCharIndex,
0,
null,
0, 0);
}
}
if (rightPart != null)
{
Run rightRun = line.AddAfter(toBeCutTextRun, rightPart);
newEndRangePointInfo =
CreateTextPointInfo(
endPoint.LineId,
endPoint.LineCharIndex,
endPoint.X,
null, ///??
startPoint.TextRunCharOffset + middlePart.CharacterCount,
startPoint.TextRunPixelOffset + MeasureCopyRunLength(middlePart).Width);
}
else
{
Run nextTxtRun = endPoint.Run.NextRun;
if (nextTxtRun != null)
{
newEndRangePointInfo = CreateTextPointInfo(
endPoint.LineId,
endPoint.LineCharIndex,
endPoint.X,
null, ///??
endPoint.TextRunPixelOffset + endPoint.Run.CharacterCount,
endPoint.TextRunPixelOffset + endPoint.Run.Width);
}
else
{
newEndRangePointInfo = CreateTextPointInfo(
endPoint.LineId,
endPoint.LineCharIndex,
endPoint.X,
null,
endPoint.TextRunCharOffset,
endPoint.TextRunPixelOffset);
}
}
if (middlePart != null)
{
line.AddAfter(toBeCutTextRun, middlePart);
}
else
{
throw new NotSupportedException();
}
line.Remove(toBeCutTextRun);
line.LocalResumeLineReArrange();
return(new SelectionRangeInfo(newStartRangePointInfo, newEndRangePointInfo));
}
else
{
TextLineBox workingLine = this;
if (startPoint.LineId != _currentLineNumber)
{
workingLine = _textFlowLayer.GetTextLine(startPoint.LineId);
}
EditableVisualPointInfo newStartPoint = workingLine.Split(startPoint);
workingLine = this;
if (endPoint.LineId != _currentLineNumber)
{
workingLine = _textFlowLayer.GetTextLine(endPoint.LineId);
}
EditableVisualPointInfo newEndPoint = workingLine.Split(endPoint);
return(new SelectionRangeInfo(newStartPoint, newEndPoint));
}
}