using System;

using System.Collections.Generic;

using Avalonia;

using Avalonia.Controls;

using Avalonia.Input;

using Avalonia.Media;

namespace SourceGit.Views

{

public class BookmarkSelector : Control

{

public static readonly DirectProperty<BookmarkSelector, int> BookmarkProperty =

AvaloniaProperty.RegisterDirect<BookmarkSelector, int>(

nameof(Bookmark),

static o => o.Bookmark,

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

public int Bookmark

{

get => _bookmark;

set => SetAndRaise(BookmarkProperty, ref _bookmark, value);

}

public BookmarkSelector()

{

var geo = Application.Current!.FindResource("Icons.Bookmark") as StreamGeometry;

_icon = geo!.Clone();

var iconBounds = _icon.Bounds;

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

var scale = Math.Min(14.0 / iconBounds.Width, 14.0 / 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);

var x = 2.0;

for (var i = 0; i < Models.Bookmarks.Brushes.Length; i++)

{

var hitBox = new Rect(x - 2.5, 2.5, 18, 20);

_hitBoxes.Add(hitBox);

x += 26;

}

}

public override void Render(DrawingContext context)

{

// Just enable clicking anywhere in the control.

context.FillRectangle(Brushes.Transparent, new Rect(0, 0, Bounds.Width, Bounds.Height));

var defaultBrush = this.FindResource("Brush.FG1") as IBrush;

var selectedBorder = new Pen(new SolidColorBrush((Color)this.FindResource("SystemAccentColor")!));

for (var i = 0; i < _hitBoxes.Count; i++)

{

var hitBox = _hitBoxes[i];

if (i == _bookmark)

context.DrawRectangle(selectedBorder, hitBox, 3);

var bursh = Models.Bookmarks.Get(i) ?? defaultBrush;

using (context.PushTransform(Matrix.CreateTranslation(hitBox.X + 3, 5)))

context.DrawGeometry(bursh, null, _icon);

}

}

protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)

{

base.OnPropertyChanged(change);

if (change.Property == BookmarkProperty)

InvalidateVisual();

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

InvalidateVisual();

}

protected override void OnPointerPressed(PointerPressedEventArgs e)

{

base.OnPointerPressed(e);

if (e.GetCurrentPoint(this).Properties.IsLeftButtonPressed)

{

var pos = e.GetPosition(this);

for (var i = 0; i < _hitBoxes.Count; i++)

{

if (_hitBoxes[i].Contains(pos))

{

Bookmark = i;

break;

}

}

e.Handled = true;

}

}

protected override Size MeasureOverride(Size availableSize)

{

return new Size(8 * 14 + 7 * 12 + 4, 24);

}

private int _bookmark = 0;

private Geometry _icon = null;

private List<Rect> _hitBoxes = [];

}

}