84 lines
3.5 KiB
C#
84 lines
3.5 KiB
C#
using FluidExplorer.Services.Icons;
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using FluidExplorer.Services.Operations;
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using Microsoft.UI.Xaml.Media;
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namespace FluidExplorer.Services;
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/// <summary>
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/// 降级占位实现：当真实现（外壳图标服务 / 文件操作引擎）在构造阶段抛异常时兜底，
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/// 保证主界面还能打开浏览（图标为空、操作给出明确失败提示），而不是整个程序起不来。
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/// </summary>
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internal sealed class PlaceholderIconService : IIconService
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{
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public Task<ImageSource?> GetIconAsync(string path, bool isDirectory, int size, CancellationToken cancellationToken)
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=> Task.FromResult<ImageSource?>(null);
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public Task<ImageSource?> GetThumbnailAsync(string path, int size, CancellationToken cancellationToken)
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=> Task.FromResult<ImageSource?>(null);
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public Task<ImageSource?> GetExtensionIconAsync(string extension, int size, CancellationToken cancellationToken)
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=> Task.FromResult<ImageSource?>(null);
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public ImageSource? GetSpecialFolderIcon(string parsingName, int size) => null;
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public void ClearCache() { }
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}
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internal sealed class PlaceholderOperationService : IFileOperationService
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{
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private readonly List<FileOperationJob> _jobs = [];
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public IReadOnlyList<FileOperationJob> Jobs => _jobs;
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public event EventHandler? JobsChanged;
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// 占位实现永远不会产生撤销记录，事件显式忽略订阅以避免空事件告警
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public event EventHandler? UndoStackChanged
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{
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add { }
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remove { }
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}
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public Func<ConflictInfo, Task<ConflictResolution>>? ConflictResolver { get; set; }
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public bool CanUndo => false;
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public string? UndoDescription => null;
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private FileOperationJob Fail(FileOperationKind kind, IReadOnlyList<string> sources, string destination)
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{
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var job = new FileOperationJob
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{
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Kind = kind,
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Title = "文件操作服务不可用",
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Sources = sources,
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Destination = destination,
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State = JobState.Failed,
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Error = "文件操作引擎尚未接入。"
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};
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_jobs.Add(job);
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JobsChanged?.Invoke(this, EventArgs.Empty);
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return job;
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}
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public FileOperationJob EnqueueCopy(IReadOnlyList<string> sources, string destination, ConflictPolicy policy = ConflictPolicy.Ask)
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=> Fail(FileOperationKind.Copy, sources, destination);
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public FileOperationJob EnqueueMove(IReadOnlyList<string> sources, string destination, ConflictPolicy policy = ConflictPolicy.Ask)
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=> Fail(FileOperationKind.Move, sources, destination);
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public FileOperationJob EnqueueDelete(IReadOnlyList<string> paths, bool permanent = false)
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=> Fail(FileOperationKind.Delete, paths, string.Empty);
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public FileOperationJob EnqueueRename(string path, string newName) => Fail(FileOperationKind.Rename, [path], newName);
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public FileOperationJob EnqueueNewFolder(string parentDirectory, string name) => Fail(FileOperationKind.NewFolder, [parentDirectory], name);
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public void Pause(Guid jobId) { }
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public void Resume(Guid jobId) { }
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public void Cancel(Guid jobId) { }
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public void ClearFinished() { }
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public Task<OperationResult> UndoAsync(CancellationToken cancellationToken = default)
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=> Task.FromResult(new OperationResult(false, 0, 0, 0, "没有可撤销的操作。"));
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public Task<(long Bytes, int Items)> MeasureAsync(IReadOnlyList<string> paths, CancellationToken cancellationToken)
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=> Task.FromResult((0L, 0));
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}
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