public VisualSelectionRangeSnapShot DoDelete()
{
//recursive
#if DEBUG
if (dbugEnableTextManRecorder)
{
_dbugActivityRecorder.WriteInfo("TxLMan::DoDelete");
_dbugActivityRecorder.BeginContext();
}
#endif
VisualSelectionRangeSnapShot removedRange = this.RemoveSelectedText();
if (removedRange.IsEmpty())
{
_updateJustCurrentLine = true;
char deletedChar = _textLineWriter.DoDeleteOneChar();
if (deletedChar == '\0')
{
//end of this line
_commandHistoryList.AddDocAction(
new DocActionJoinWithNextLine(
_textLineWriter.LineNumber, _textLineWriter.CharIndex));
JoinWithNextLine();
_updateJustCurrentLine = false;
}
else
{
_commandHistoryList.AddDocAction(
new DocActionDeleteChar(
deletedChar, _textLineWriter.LineNumber, _textLineWriter.CharIndex));
char nextChar = _textLineWriter.NextChar;
if (nextChar != '\0')
{
if (!CanCaretStopOnThisChar(nextChar))
{
//TODO: review return range here again
return(DoDelete());
}
}
}
}
#if DEBUG
if (dbugEnableTextManRecorder)
{
_dbugActivityRecorder.EndContext();
}
#endif
NotifyContentSizeChanged();
return(removedRange);
}
public bool DoBackspace()
{
#if DEBUG
if (dbugEnableTextManRecorder)
{
dbug_BackSpaceCount++;
_dbugActivityRecorder.WriteInfo("TxLMan::DoBackSpace");
_dbugActivityRecorder.BeginContext();
}
#endif
VisualSelectionRangeSnapShot removeSelRange = this.RemoveSelectedText();
if (!removeSelRange.IsEmpty())
{
CancelSelect();
#if DEBUG
if (dbugEnableTextManRecorder)
{
_dbugActivityRecorder.EndContext();
}
#endif
return(true);
}
else
{
_updateJustCurrentLine = true;
char deletedChar = _textLineWriter.DoBackspaceOneChar();
if (deletedChar == '\0')
{
//end of current line
if (!IsOnFirstLine)
{
CurrentLineNumber--;
DoEnd();
_commandHistoryList.AddDocAction(
new DocActionJoinWithNextLine(
_textLineWriter.LineNumber, _textLineWriter.CharIndex));
JoinWithNextLine();
}
#if DEBUG
if (dbugEnableTextManRecorder)
{
_dbugActivityRecorder.EndContext();
}
#endif
return(false);
}
else
{
_commandHistoryList.AddDocAction(
new DocActionDeleteChar(
deletedChar, _textLineWriter.LineNumber, _textLineWriter.CharIndex));
#if DEBUG
if (dbugEnableTextManRecorder)
{
_dbugActivityRecorder.EndContext();
}
#endif
return(true);
}
}
}