Initial commit: FluidExplorer：从零实现的 WinUI 3 文件资源管理器替代品（Mica、命令栏、面包屑）

2026-09-19 11:54:03 +08:00
commit 5780fde61a
60 changed files with 15035 additions and 0 deletions
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+using CommunityToolkit.Mvvm.ComponentModel;
+using FluidExplorer.Navigation;
+using FluidExplorer.Services;
+using FluidExplorer.Services.FileSystem;
+using FluidExplorer.Services.ItemVisuals;
+using FluidExplorer.Services.Operations;
+using FluidExplorer.Services.Search;
+using Microsoft.UI.Dispatching;
+using PathHelper = FluidExplorer.Services.FileSystem.PathHelper;
+
+namespace FluidExplorer.ViewModels;
+
+/// <summary>一个标签页：包含主窗格，可选第二窗格（双窗格模式，搬文件不用来回切）。</summary>
+public sealed partial class ExplorerTabViewModel : ObservableObject
+{
+    private readonly IFileSystemService _fs;
+    private readonly SearchService _search;
+    private readonly IFileOperationService _operations;
+    private readonly ItemVisualService _visuals;
+    private readonly IFileClipboard _clipboard;
+    private readonly AppSettings _settings;
+    private readonly DispatcherQueue _ui;
+
+    [ObservableProperty] private bool _isDualPane;
+    [ObservableProperty] private bool _isActivePaneSecondary;
+    [ObservableProperty] private string _header = "新标签页";
+    [ObservableProperty] private string _glyph = "\uE8B7";
+
+    public ExplorerTabViewModel(
+        IFileSystemService fs,
+        SearchService search,
+        IFileOperationService operations,
+        ItemVisualService visuals,
+        IFileClipboard clipboard,
+        AppSettings settings,
+        DispatcherQueue ui,
+        NavigationLocation start)
+    {
+        _fs = fs;
+        _search = search;
+        _operations = operations;
+        _visuals = visuals;
+        _clipboard = clipboard;
+        _settings = settings;
+        _ui = ui;
+
+        Primary = new ExplorerPaneViewModel(fs, search, operations, visuals, clipboard, settings, ui);
+        Primary.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName == nameof(ExplorerPaneViewModel.Title)) UpdateHeader();
+        };
+        Primary.SettingsChanged += (_, _) => UpdateHeader();
+        _ = Primary.NavigateAsync(start);
+        UpdateHeader();
+    }
+
+    public ExplorerPaneViewModel Primary { get; }
+
+    [ObservableProperty] private ExplorerPaneViewModel? _secondary;
+
+    public ExplorerPaneViewModel ActivePane => IsDualPane && IsActivePaneSecondary && Secondary is not null ? Secondary : Primary;
+
+    public ExplorerPaneViewModel EnsureSecondary()
+    {
+        if (Secondary is not null) return Secondary;
+        var pane = new ExplorerPaneViewModel(_fs, _search, _operations, _visuals, _clipboard, _settings, _ui)
+        {
+            ShowSidebar = false
+        };
+        pane.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName == nameof(ExplorerPaneViewModel.Title)) UpdateHeader();
+        };
+        Secondary = pane;
+        return pane;
+    }
+
+    public void ToggleDualPane()
+    {
+        if (IsDualPane)
+        {
+            IsDualPane = false;
+            IsActivePaneSecondary = false;
+            return;
+        }
+
+        var secondary = EnsureSecondary();
+        if (string.IsNullOrEmpty(secondary.CurrentPath) || secondary.CurrentPath.StartsWith("::", StringComparison.Ordinal))
+        {
+            // 第二个窗格默认停在与主窗格同级的目录，便于对拖
+            var parent = PathHelper.GetParent(Primary.CurrentPath);
+            _ = secondary.NavigateAsync(NavigationLocation.FromPath(
+                Directory.Exists(parent) ? parent : Primary.CurrentPath));
+        }
+        IsDualPane = true;
+    }
+
+    private void UpdateHeader()
+    {
+        Header = Primary.IsSearchActive && !string.IsNullOrWhiteSpace(Primary.SearchText)
+            ? $"搜索：{Primary.SearchText}"
+            : Primary.Title;
+        Glyph = Primary.Glyph;
+    }
+
+    public void Dispose()
+    {
+        Primary.Dispose();
+        Secondary?.Dispose();
+    }
+}