| 1 | using System.Text.Json; |
| 2 | using Avalonia; |
| 3 | using Avalonia.Controls; |
| 4 | using Avalonia.Media.Imaging; |
| 5 | |
| 6 | namespace CascadeIDE.Services; |
| 7 | |
| 8 | /// <summary> |
| 9 | /// Рендер окна в PNG (для MCP <c>capture_window</c>, в т.ч. все окна при <c>scope=all</c>). |
| 10 | /// Вызывать только с UI-потока. |
| 11 | /// </summary> |
| 12 | public static class IdeWindowScreenshot |
| 13 | { |
| 14 | /// <summary>PNG в памяти и размеры в пикселях.</summary> |
| 15 | public static (byte[] PngBytes, int WidthPx, int HeightPx) CaptureWindowPng(Window window) |
| 16 | { |
| 17 | ArgumentNullException.ThrowIfNull(window); |
| 18 | var scale = window.RenderScaling; |
| 19 | var cw = window.ClientSize.Width; |
| 20 | var ch = window.ClientSize.Height; |
| 21 | if (cw <= 0 || ch <= 0) |
| 22 | cw = window.Bounds.Width; |
| 23 | if (ch <= 0) |
| 24 | ch = window.Bounds.Height; |
| 25 | var pw = Math.Max(1, (int)Math.Ceiling(cw * scale)); |
| 26 | var ph = Math.Max(1, (int)Math.Ceiling(ch * scale)); |
| 27 | var pixelSize = new PixelSize(pw, ph); |
| 28 | using var rtb = new RenderTargetBitmap(pixelSize); |
| 29 | rtb.Render(window); |
| 30 | using var ms = new MemoryStream(); |
| 31 | rtb.Save(ms); |
| 32 | return (ms.ToArray(), pw, ph); |
| 33 | } |
| 34 | |
| 35 | /// <summary> |
| 36 | /// JSON для MCP: base64 PNG и опционально сохранение под workspace. |
| 37 | /// </summary> |
| 38 | public static string BuildCaptureJson(byte[] pngBytes, int widthPx, int heightPx, string? savedFullPath) |
| 39 | { |
| 40 | var b64 = Convert.ToBase64String(pngBytes); |
| 41 | return JsonSerializer.Serialize(new |
| 42 | { |
| 43 | format = "png_base64", |
| 44 | width = widthPx, |
| 45 | height = heightPx, |
| 46 | data = b64, |
| 47 | saved_path = savedFullPath |
| 48 | }); |
| 49 | } |
| 50 | |
| 51 | /// <summary> |
| 52 | /// Сохранить PNG под корнем workspace, если пути заданы и путь остаётся внутри корня. |
| 53 | /// </summary> |
| 54 | public static string? TrySaveUnderWorkspace(string workspaceRoot, string relativePath, byte[] pngBytes) |
| 55 | { |
| 56 | if (string.IsNullOrWhiteSpace(workspaceRoot) || string.IsNullOrWhiteSpace(relativePath)) |
| 57 | return null; |
| 58 | var root = CanonicalFilePath.Normalize(workspaceRoot.Trim()); |
| 59 | var combined = CanonicalFilePath.Normalize(Path.Combine(root, relativePath.Trim().Replace('/', Path.DirectorySeparatorChar))); |
| 60 | if (!IsStrictSubPath(root, combined)) |
| 61 | return null; |
| 62 | var dir = Path.GetDirectoryName(combined); |
| 63 | if (!string.IsNullOrEmpty(dir)) |
| 64 | Directory.CreateDirectory(dir); |
| 65 | File.WriteAllBytes(combined, pngBytes); |
| 66 | return combined; |
| 67 | } |
| 68 | |
| 69 | private static bool IsStrictSubPath(string rootDir, string candidateFile) |
| 70 | { |
| 71 | rootDir = CanonicalFilePath.Normalize(rootDir.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)) |
| 72 | + Path.DirectorySeparatorChar; |
| 73 | candidateFile = CanonicalFilePath.Normalize(candidateFile); |
| 74 | return candidateFile.StartsWith(rootDir, StringComparison.OrdinalIgnoreCase); |
| 75 | } |
| 76 | } |
| 77 | |