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));
}
}
internal void Remove(VisualSelectionRange selectionRange)
{
EditableVisualPointInfo startPoint = selectionRange.StartPoint;
EditableVisualPointInfo endPoint = selectionRange.EndPoint;
if (startPoint.Run != null)
{
if (startPoint.Run == endPoint.Run)
{
Run removedRun = startPoint.Run;
Run.InnerRemove(removedRun,
startPoint.RunLocalSelectedIndex,
endPoint.LineCharIndex - startPoint.LineCharIndex, false);
if (removedRun.CharacterCount == 0)
{
if (startPoint.LineId == _currentLineNumber)
{
this.Remove(removedRun);
}
else
{
TextLineBox line = _textFlowLayer.GetTextLine(startPoint.LineId);
line.Remove(removedRun);
}
}
}
else
{
GetStartAndStopLine(startPoint, endPoint, out TextLineBox startLine, out TextLineBox stopLine);
EditableVisualPointInfo newStartPoint = startLine.Split(startPoint);
EditableVisualPointInfo newStopPoint = stopLine.Split(endPoint);
if (startLine == stopLine)
{
if (newStartPoint.Run != null)
{
LinkedList <Run> tobeRemoveRuns = new LinkedList <Run>();
if (newStartPoint.LineCharIndex == 0)
{
foreach (Run t in _textFlowLayer.TextRunForward(
newStartPoint.Run,
newStopPoint.Run))
{
tobeRemoveRuns.AddLast(t);
}
}
else
{
foreach (Run t in _textFlowLayer.TextRunForward(
newStartPoint.Run.NextRun,
newStopPoint.Run))
{
tobeRemoveRuns.AddLast(t);
}
}
startLine.LocalSuspendLineReArrange();
foreach (Run t in tobeRemoveRuns)
{
startLine.Remove(t);
}
startLine.LocalResumeLineReArrange();
}
else
{
//this may be the blank line
startLine.Clear();
#if DEBUG
//TODO: review here again
//System.Diagnostics.Debug.WriteLine("EditableTextLine_adv1");
#endif
}
}
else
{
int startLineId = newStartPoint.LineId;
int stopLineId = newStopPoint.LineId;
if (newStopPoint.LineCharIndex > 0)
{
stopLine.RemoveLeft(newStopPoint.Run);
}
for (int i = stopLineId - 1; i > startLineId; i--)
{
TextLineBox line = _textFlowLayer.GetTextLine(i);
line.Clear();
line.JoinWithNextLine();
}
if (newStartPoint.LineCharIndex == 0)
{
startLine.RemoveRight(newStartPoint.Run);
}
else
{
Run nextRun = (newStartPoint.Run).NextRun;
if (nextRun != null)
{
startLine.RemoveRight(nextRun);
}
}
startLine.JoinWithNextLine();
}
}
}
else
{
GetStartAndStopLine(startPoint, endPoint, out TextLineBox startLine, out TextLineBox stopLine);
EditableVisualPointInfo newStartPoint = startLine.Split(startPoint);
EditableVisualPointInfo newStopPoint = stopLine.Split(endPoint);
if (startLine == stopLine)
{
if (newStartPoint.Run != null)
{
LinkedList <Run> tobeRemoveRuns = new LinkedList <Run>();
if (newStartPoint.LineCharIndex == -1)
{
foreach (Run t in _textFlowLayer.TextRunForward(
newStartPoint.Run,
newStopPoint.Run))
{
tobeRemoveRuns.AddLast(t);
}
}
else
{
foreach (Run t in _textFlowLayer.TextRunForward(
newStartPoint.Run.NextRun,
newStopPoint.Run))
{
tobeRemoveRuns.AddLast(t);
}
}
foreach (Run t in tobeRemoveRuns)
{
startLine.Remove(t);
}
}
else
{
throw new NotSupportedException();
}
}
else
{
int startLineId = newStartPoint.LineId;
int stopLineId = newStopPoint.LineId;
if (newStopPoint.LineCharIndex > -1)
{
stopLine.RemoveLeft(newStopPoint.Run);
}
for (int i = stopLineId - 1; i > startLineId; i--)
{
TextLineBox line = _textFlowLayer.GetTextLine(i);
line.Clear();
line.JoinWithNextLine();
}
if (newStartPoint.LineCharIndex == -1)
{
//TODO: review here again
//at this point newStartPoint.TextRun should always null
if (newStartPoint.Run != null)
{
startLine.RemoveRight(newStartPoint.Run);
}
}
else
{
//at this point newStartPoint.TextRun should always null
//TODO newStartPoint.TextRun == null???
if (newStartPoint.Run != null)
{
Run nextRun = newStartPoint.Run.NextRun;
if (nextRun != null)
{
startLine.RemoveRight(nextRun);
}
}
}
startLine.JoinWithNextLine();
}
}
}
