143 lines
4.1 KiB
C#
143 lines
4.1 KiB
C#
using System.Text;
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public class ConsoleWriter
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{
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private const string SYMBOL_INPUT = " <: ";
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private const string SYMBOL_INPUT_CONTINUE = " : ";
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private readonly List<char> _buffer = [];
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private readonly Stack<char[]> _history = [];
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private readonly Encoding _encoding;
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private int _position;
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private (int x, int y) _origin;
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private (int x, int y) _cursorPosition => Console.GetCursorPosition();
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private int _cursorOffset => SYMBOL_INPUT.Length;
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private int _cursorLeft { get => Console.CursorLeft; set => Console.CursorLeft = value; }
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private int _cursorTop { get => Console.CursorTop; set => Console.CursorTop = value; }
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public bool UseSyntaxHighlighting { get; set; } = false;
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public ConsoleWriter(Encoding encoding)
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{
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_encoding = encoding;
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}
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private void Write(char c) => Console.Write(c);
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private void Write(string str) => Console.Write(str);
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private void SetCursor((int x, int y) position) => Console.SetCursorPosition(position.x, position.y);
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private void SetColor(ConsoleColor color, ConsoleColor background = ConsoleColor.Black)
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{
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Console.ForegroundColor = color;
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Console.BackgroundColor = background;
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}
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private void Move(int x, int y = 0)
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{
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_position = Math.Min(_buffer.Count, Math.Max(0, _position + x));
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_cursorLeft -= 1; //????
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}
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private void ClearLine()
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{
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int left = _cursorLeft;
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while (_cursorLeft < Console.BufferWidth - 1)
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Write(' ');
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_cursorLeft = left;
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}
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private void Print((int x, int y) origin, (int x, int y)? remain = null)
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{
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SetColor(ConsoleColor.White);
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SetCursor(origin);
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Write(" <: ");
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foreach (var c in _buffer) {
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if (c == '\n') {
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ClearLine();
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Write("\n : ");
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} else {
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Write(c);
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}
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}
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ClearLine();
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if (remain.HasValue)
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SetCursor(remain.Value);
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}
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private Stream Dispatch()
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{
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var stream = new MemoryStream();
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var data = _buffer.ToArray();
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stream.Write(_encoding.GetBytes(data));
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_history.Push(data);
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_buffer.Clear();
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return stream;
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}
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public ConsoleCode Read(out Stream? stream)
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{
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stream = null;
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ConsoleKeyInfo input;
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_origin = _cursorPosition;
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_position = 0;
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Print(_origin);
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do {
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if (UseSyntaxHighlighting)
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new ConsoleRenderer(new MemoryStream(_encoding.GetBytes(_buffer.ToArray()))).Render(_origin); // ~ so efficient ~ XD
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Print(_origin, _cursorPosition);
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input = Console.ReadKey(true);
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if (input.Modifiers == ConsoleModifiers.Control) {
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if (input.Key == ConsoleKey.C)
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return ConsoleCode.Exit;
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if (input.Key == ConsoleKey.H) {
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UseSyntaxHighlighting = !UseSyntaxHighlighting;
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Write($"\n #: {nameof(UseSyntaxHighlighting)} = {UseSyntaxHighlighting}\n <: ");
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_origin = _cursorPosition;
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}
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if (input.Key == ConsoleKey.LeftArrow) {
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}
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continue;
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}
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if (input.Key == ConsoleKey.LeftArrow) {
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if (_position > 0) {
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_position--;
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_cursorLeft--;
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}
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continue;
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}
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if (input.Key == ConsoleKey.RightArrow) {
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if (_position < _buffer.Count) {
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_position++;
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_cursorLeft++;
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}
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continue;
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}
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if (input.Key == ConsoleKey.Backspace) {
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if (_position > 0) {
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_cursorLeft--;
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_buffer.RemoveRange(--_position, 1);
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}
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continue;
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} else if (input.Check(ConsoleKey.Enter, ConsoleModifiers.Shift)) {
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_buffer.Insert(_position++, '\n');
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_cursorLeft = _cursorOffset;
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_cursorTop++;
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continue;
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} else {
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_buffer.Insert(_position++, input.KeyChar);
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_cursorLeft++;
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}
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} while (!input.Check(ConsoleKey.Enter, ConsoleModifiers.None, true));
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stream = Dispatch();
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return ConsoleCode.OK;
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}
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}
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