private void Delete()
{
if (CurrentDisplayLineLength == 0 & TextBoxType != TextBoxType.Multiline)
{
return;
}
if (CursorLeft != CurrentDisplayLineLength)
{
var line = CurrentDisplayLine;
// remove one character from the list of characters
CurrentDisplayLine = CurrentDisplayLine.Remove(CursorLeft, 1);
}
else
{
if (CurrentDisplayLineIndex < DisplayLines.Count)
{
DisplayLines.RemoveAt(CurrentDisplayLineIndex);
}
}
// redraw and repaint
DrawText();
Paint();
}
private void Backspace()
{
if (CurrentDisplayLineLength == 0)
{
return;
}
// remove one character from the list of characters
if (CursorLeft == CurrentDisplayLineLength)
{
CurrentDisplayLine = CurrentDisplayLine.LeftPart(CursorLeft - 1);
}
else
{
if (CursorLeft == 0)
{
if (DecrementCursorTop())
{
MoveToEnd();
var nextLine = DisplayLines[CurrentDisplayLineIndex + 1];
var newLine = CurrentDisplayLine.LeftPart(CursorLeft - 1);
//DisplayLines.RemoveAt(CurrentDisplayLineIndex + 1);
DisplayLines[CurrentDisplayLineIndex + 1] = string.Empty;
CurrentDisplayLine = newLine + nextLine;
}
}
else
{
CurrentDisplayLine = CurrentDisplayLine.Substring(0, CursorLeft - 1) + CurrentDisplayLine.Substring(CursorLeft, CurrentDisplayLine.Length - CursorLeft);
}
}
// move the cursor to the left by one character
MoveCursorLeft();
// redraw and repaint
DrawText();
Paint();
}
private void ProcessKey(ConsoleKeyInfo info)
{
if ((CursorLeft < ClientWidth & Text.Length < MaxLength) || (CursorLeft < ClientWidth & MaxLength == 0))
{
var keyValue = info.KeyChar.ToString();
// at the end of the line so add the character
if (CursorLeft == CurrentDisplayLineLength)
{
if (info.Key == ConsoleKey.Enter)
{
DisplayLines.Insert(CurrentDisplayLineIndex + 1, string.Empty);
}
else
{
CurrentDisplayLine = CurrentDisplayLine + keyValue;
}
}
else
{
var line = CurrentDisplayLine;
if (Insert)
{
if (info.Key == ConsoleKey.Enter)
{
CurrentDisplayLine = line.LeftPart(CursorLeft);
DisplayLines.Insert(CurrentDisplayLineIndex + 1, line.RightPart(CursorLeft));
}
else
{
CurrentDisplayLine = CurrentDisplayLine.Insert(CursorLeft, keyValue);
}
}
else
{
if (info.Key == ConsoleKey.Enter)
{
CurrentDisplayLine = line.LeftPart(CursorLeft);
DisplayLines.Insert(CurrentDisplayLineIndex + 1, line.RightPart(CursorLeft + 1));
}
else
{
CurrentDisplayLine = line.LeftPart(CursorLeft) + keyValue + line.RightPart(CursorLeft + 1);
}
}
}
if (info.Key == ConsoleKey.Enter)
{
IncrementCursorTop();
CursorLeft = 0;
}
else
{
CursorLeft++;
if (CursorLeft >= ClientWidth)
{
if (TextBoxType == TextBoxType.Multiline)
{
CursorLeft = 0;
if (CursorTop < ClientHeight)
{
CursorTop++;
}
}
else
{
CursorLeft = ClientWidth;
}
}
}
SetCursorPosition();
// redraw and repaint
DrawText();
Paint();
}
}