using System;

using Avalonia;

using Avalonia.Controls;

using Avalonia.Media;

namespace SourceGit.Views

{

public class Bookmark : Control

{

public static readonly DirectProperty<Bookmark, int> ValueProperty =

AvaloniaProperty.RegisterDirect<Bookmark, int>(

nameof(Value),

static o => o.Value,

static (o, v) => o.Value = v);

public int Value

{

get => _value;

set => SetAndRaise(ValueProperty, ref _value, value);

}

public Bookmark()

{

IsHitTestVisible = false;

}

public override void Render(DrawingContext context)

{

if (_icon == null)

LoadIcon();

var brush = Models.Bookmarks.Get(_value) ?? (this.FindResource("Brush.FG1") as IBrush);

var startX = (Bounds.Width - 12.0) * 0.5;

var startY = (Bounds.Height - 12.0) * 0.5;

using (context.PushTransform(Matrix.CreateTranslation(startX, startY)))

context.DrawGeometry(brush, null, _icon);

}

protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)

{

base.OnPropertyChanged(change);

if (change.Property == ValueProperty)

InvalidateVisual();

else if (change.Property.Name == nameof(ActualThemeVariant) && change.NewValue != null)

InvalidateVisual();

}

private void LoadIcon()

{

var geo = this.FindResource("Icons.Bookmark") as StreamGeometry;

_icon = geo!.Clone();

var iconBounds = _icon.Bounds;

var translation = Matrix.CreateTranslation(-(Vector)iconBounds.Position);

var scale = Math.Min(12.0 / iconBounds.Width, 12.0 / iconBounds.Height);

var transform = translation * Matrix.CreateScale(scale, scale);

if (_icon.Transform == null || _icon.Transform.Value == Matrix.Identity)

_icon.Transform = new MatrixTransform(transform);

else

_icon.Transform = new MatrixTransform(_icon.Transform.Value * transform);

}

private int _value = 0;

private Geometry _icon = null;

}

}