using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;

namespace Qrakhen.Qamp.Editor.Controls;

public class Caret : Adorner
{
    private readonly Pen _caretPen;
    private readonly double _lineHeight;
    private Point _cursorPosition;

    public Caret(UIElement adornedElement, double lineHeight) : base(adornedElement)
    {
        _lineHeight = lineHeight;
        _caretPen = new Pen(Brushes.LimeGreen, 1.5);
        IsHitTestVisible = false;
    }

    public void UpdatePosition(Point newPosition)
    {
        _cursorPosition = newPosition;
        InvalidateVisual();
    }

    protected override void OnRender(DrawingContext drawingContext)
    {
        Point startPoint = new(_cursorPosition.X, _cursorPosition.Y);
        Point endPoint = new(_cursorPosition.X, _cursorPosition.Y + _lineHeight);
        drawingContext.DrawLine(_caretPen, startPoint, endPoint);
    }
}