public void AddLineBreakAfter(Run afterTextRun)
{
if (afterTextRun == null)
{
this.EndWithLineBreak = true;
TextLineBox newline = _textFlowLayer.InsertNewLine(_currentLineNumber + 1);
//
if (_textFlowLayer.LineCount - 1 != newline.LineNumber)
{
newline.EndWithLineBreak = true;
}
}
else if (afterTextRun.NextRun == null)
{
this.EndWithLineBreak = true;
TextLineBox newline = _textFlowLayer.InsertNewLine(_currentLineNumber + 1);
//
if (_textFlowLayer.LineCount - 1 != newline.LineNumber)
{
newline.EndWithLineBreak = true;
}
}
else
{
using (RunListPool.Borrow(out List <Run> tempTextRuns))
{
if (afterTextRun != null)
{
foreach (Run t in GetRunIterForward(afterTextRun.NextRun))
{
tempTextRuns.Add(t);
}
}
bool thisEndWithLineBreak = this.EndWithLineBreak;
this.EndWithLineBreak = true;
this.LocalSuspendLineReArrange();
TextLineBox newTextline = _textFlowLayer.InsertNewLine(_currentLineNumber + 1);
newTextline.EndWithLineBreak = thisEndWithLineBreak;
//
int j = tempTextRuns.Count;
newTextline.LocalSuspendLineReArrange();
int cx = 0;
for (int i = 0; i < j; ++i)
{
Run t = tempTextRuns[i];
this.Remove(t);
newTextline.AddLast(t);
Run.DirectSetLocation(t, cx, 0);
cx += t.Width;
}
newTextline.LocalResumeLineReArrange();
this.LocalResumeLineReArrange();
}
}
}
void AddLineBreakBefore(Run beforeTextRun)
{
if (beforeTextRun == null)
{
this.EndWithLineBreak = true;
_textFlowLayer.InsertNewLine(_currentLineNumber + 1);
}
else
{
//TODO: use pool
using (RunListPool.Borrow(out List <Run> tempTextRuns))
{
if (beforeTextRun != null)
{
foreach (Run t in GetRunIterForward(beforeTextRun))
{
tempTextRuns.Add(t);
}
}
this.EndWithLineBreak = true;
TextLineBox newTextline = _textFlowLayer.InsertNewLine(_currentLineNumber + 1);
//
this.LocalSuspendLineReArrange();
newTextline.LocalSuspendLineReArrange();
int j = tempTextRuns.Count;
for (int i = 0; i < j; ++i)
{
Run t = tempTextRuns[i];
this.Remove(t);
newTextline.AddLast(t);
}
this.LocalResumeLineReArrange();
newTextline.LocalResumeLineReArrange();
}
}
}
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));
}
}