/// <summary>
/// Computes the visual lines from the console text lines.
/// </summary>
/// <remarks>
/// Text lines are split into several lines if they are larger than _numberOfColumns
/// or if they contain '\n'.
/// </remarks>
private void WrapLines()
{
_wrappedLines.Clear();
// Temporarily, add text that is currently entered to the text lines.
TextLines.Add(Prompt + Text);
// Go through TextLines and split lines at if they are to large or contains newlines
// characters.
StringBuilder builder = new StringBuilder();
foreach (string line in TextLines)
{
builder.Clear();
int lineLength = line.Length;
if (lineLength == 0)
{
// Empty line.
_wrappedLines.Add(string.Empty);
continue;
}
// Go through line character by character.
for (int i = 0; i < lineLength; i++)
{
char c = line[i];
if (c == '\n') // ----- A newline character.
{
_wrappedLines.Add(builder.ToString());
builder.Clear();
}
else if (builder.Length < _numberOfColumns) // ----- A character that fits onto the line.
{
builder.Append(c);
if (i == lineLength - 1)
{
// Finish line if this is the last character.
_wrappedLines.Add(builder.ToString());
builder.Clear();
}
}
else if (builder.Length >= _numberOfColumns) // ----- Reached the console column limit.
{
// Wrap line.
_wrappedLines.Add(builder.ToString());
builder.Clear();
i--; // Handle the character again in the next loop.
}
}
}
// Remove the temporarily added current text.
TextLines.RemoveAt(TextLines.Count - 1);
}
private void LimitText()
{
// Limit entries in TextLines and entries in command history.
while (TextLines.Count > MaxLines)
{
TextLines.RemoveAt(0);
InvalidateArrange();
}
while (History.Count > MaxHistoryEntries)
{
History.RemoveAt(0);
InvalidateArrange();
}
}