private void ShowCommandHistoryEntry(int deltaIndex)
{
if (commandHistory.Count > 0)
{
int newHistoryIndex = commandHistoryIndex + deltaIndex;
if (newHistoryIndex >= 0 && newHistoryIndex < commandHistory.Count)
{
commandHistoryIndex = newHistoryIndex;
LineBuilder = new StringBuilder();
LineBuilder.Append(commandHistory[commandHistoryIndex]);
LineCursorIndex = LineBuilder.Length;
MarkRowsDirty(LineSubBuffer.PositionRow, LineSubBuffer.RowCount);
LineSubBuffer.Wipe();
UpdateLineSubBuffer();
}
}
}
protected void UpdateLineSubBuffer()
{
string commandText = LineBuilder.ToString();
List <string> lines = SplitIntoLinesPreserveNewLine(commandText);
if (lines.Count != LineSubBuffer.RowCount)
{
LineSubBuffer.SetSize(lines.Count, LineSubBuffer.ColumnCount);
}
for (int lineIndex = 0; lineIndex < lines.Count; lineIndex++)
{
char[] lineCharArray = lines[lineIndex].PadRight(LineSubBuffer.ColumnCount, ' ').ToCharArray();
lineCharArray.CopyTo(LineSubBuffer.Buffer[lineIndex], 0);
}
UpdateSubBufferCursor(lines);
}
protected override void NewLine()
{
string commandText = LineBuilder.ToString();
if (Shared.ScriptHandler.IsCommandComplete(commandText))
{
base.NewLine();
AddCommandHistoryEntry(commandText); // add to history first so that if ProcessCommand generates an exception,
// the command is present in the history to be found and printed in the
// error message.
ProcessCommand(commandText);
int numRows = LineSubBuffer.RowCount;
LineSubBuffer.Wipe();
LineSubBuffer.SetSize(numRows, ColumnCount); // refill it to its previous size
}
else
{
InsertChar('\n');
}
}
