public void AddTextOnCurrentPosition(string text)
{
if (IsInsertMode && CurrentChar < TextLines[CurrentString].Length)
{
TextLines.RemoveInLine(CurrentString, CurrentChar,
Math.Min(text.Length, TextLines[CurrentString].Length - CurrentChar));
}
TextLines.InsertInLine(CurrentString, text, CurrentChar);
CurrentPosition.Chr += text.Length;
}
public void NewLineFromCurrentPosition()
{
TextLines.InsertLine(
CurrentString + 1,
CurrentChar < TextLines[CurrentString].Length
? TextLines[CurrentString].Substring(CurrentChar)
: string.Empty);
if (CurrentChar < TextLines[CurrentString].Length)
{
TextLines.RemoveInLine(CurrentString, CurrentChar);
}
CurrentPosition.Str++;
CurrentPosition.Chr = 0;
}
public void DeleteAfterCurrentPosition()
{
if (CurrentChar == TextLines[CurrentString].Length)
{
if (CurrentString == TextLines.Count - 1)
{
return;
}
var nextString = CurrentString + 1;
TextLines.AddInLine(CurrentString, TextLines[nextString]);
TextLines.RemoveLineAt(nextString);
}
else
{
TextLines.RemoveInLine(CurrentString, CurrentChar, 1);
}
}
public void DeleteBeforeCurrentPosition()
{
if (CurrentChar == 0)
{
if (CurrentString == 0)
{
return;
}
var newPosition = TextLines[CurrentString - 1].Length;
TextLines.AddInLine(CurrentString - 1, TextLines[CurrentString]);
TextLines.RemoveLineAt(CurrentString);
CurrentPosition.Str--;
CurrentPosition.Chr = newPosition;
}
else
{
TextLines.RemoveInLine(CurrentString, CurrentChar - 1, 1);
CurrentPosition.Chr--;
}
}