| 1 | #nullable enable |
| 2 | |
| 3 | using Avalonia; |
| 4 | using CascadeIDE.Models.Intercom; |
| 5 | using SkiaSharp; |
| 6 | |
| 7 | namespace CascadeIDE.Views.Chat.Skia; |
| 8 | |
| 9 | /// <summary> |
| 10 | /// Единый реестр pointer hit для Skia-ленты чата: регистрация в content-space, поиск в control-space. |
| 11 | /// Приоритет при перекрытии: <see cref="SkiaChatHit.RevealAttachment"/> → <see cref="SkiaChatPointerAction"/> (chrome) → z-order. |
| 12 | /// </summary> |
| 13 | internal sealed class SkiaChatHitRegistry |
| 14 | { |
| 15 | private readonly List<(Rect Bounds, SkiaChatHit Hit)> _entries = []; |
| 16 | |
| 17 | public int Count => _entries.Count; |
| 18 | |
| 19 | public void Clear() => _entries.Clear(); |
| 20 | |
| 21 | /// <summary>Координаты как при Draw (до canvas.Restore): Y сдвигается на <paramref name="scrollOffset"/>.</summary> |
| 22 | public void RegisterContentRect(SKRect contentRect, float scrollOffset, SkiaChatHit hit) => |
| 23 | RegisterControlRect( |
| 24 | new Rect( |
| 25 | contentRect.Left, |
| 26 | contentRect.Top - scrollOffset, |
| 27 | contentRect.Width, |
| 28 | contentRect.Height), |
| 29 | hit); |
| 30 | |
| 31 | public void RegisterControlRect(Rect controlRect, SkiaChatHit hit) => |
| 32 | _entries.Add((controlRect, hit)); |
| 33 | |
| 34 | public int FindIndex(Point controlPoint) => |
| 35 | FindIndex(_entries, controlPoint); |
| 36 | |
| 37 | /// <summary>Общая политика hit-test (unit-тесты и реестр).</summary> |
| 38 | public static int FindIndex(IReadOnlyList<(Rect Bounds, SkiaChatHit Hit)> entries, Point controlPoint) |
| 39 | { |
| 40 | for (var i = entries.Count - 1; i >= 0; i--) |
| 41 | { |
| 42 | if (entries[i].Bounds.Contains(controlPoint) |
| 43 | && entries[i].Hit.RevealAttachment is not null) |
| 44 | { |
| 45 | return i; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | for (var i = entries.Count - 1; i >= 0; i--) |
| 50 | { |
| 51 | if (entries[i].Bounds.Contains(controlPoint) |
| 52 | && entries[i].Hit.PointerAction != SkiaChatPointerAction.None) |
| 53 | { |
| 54 | return i; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | for (var i = entries.Count - 1; i >= 0; i--) |
| 59 | { |
| 60 | if (entries[i].Bounds.Contains(controlPoint)) |
| 61 | return i; |
| 62 | } |
| 63 | |
| 64 | return -1; |
| 65 | } |
| 66 | |
| 67 | public bool ContainsPointerAction(Point controlPoint, SkiaChatPointerAction action) |
| 68 | { |
| 69 | for (var i = _entries.Count - 1; i >= 0; i--) |
| 70 | { |
| 71 | if (_entries[i].Bounds.Contains(controlPoint) |
| 72 | && _entries[i].Hit.PointerAction == action) |
| 73 | { |
| 74 | return true; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | public bool TryGetHit(int index, out SkiaChatHit hit) |
| 82 | { |
| 83 | if ((uint)index >= (uint)_entries.Count) |
| 84 | { |
| 85 | hit = default; |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | hit = _entries[index].Hit; |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | public static bool WantsHandCursor(in SkiaChatHit hit) => |
| 94 | hit.RevealAttachment is not null |
| 95 | || hit.PointerAction is SkiaChatPointerAction.ComposerSend |
| 96 | or SkiaChatPointerAction.OverviewToggle |
| 97 | or SkiaChatPointerAction.TopicTabSelect |
| 98 | or SkiaChatPointerAction.TopicTabCreate |
| 99 | or SkiaChatPointerAction.TopicTabOverflow |
| 100 | or SkiaChatPointerAction.TopicNavigatorToggle |
| 101 | or SkiaChatPointerAction.TopicNavigatorSearchFocus; |
| 102 | |
| 103 | public static bool IsChromeAction(in SkiaChatHit hit) => |
| 104 | hit.PointerAction != SkiaChatPointerAction.None; |
| 105 | |
| 106 | public static bool IsComposerAction(in SkiaChatHit hit) => |
| 107 | hit.PointerAction is SkiaChatPointerAction.ComposerSend |
| 108 | or SkiaChatPointerAction.ComposerFocus |
| 109 | or SkiaChatPointerAction.SlashPopup; |
| 110 | } |
| 111 | |