QI Mingxuan
330 lines
11 KiB
C#
330 lines
11 KiB
C#
using System;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Threading;
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using Prism.Commands;
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using Prism.Mvvm;
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using Serilog.Events;
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using XP.Common.Localization;
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namespace XP.Common.Logging.ViewModels
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{
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/// <summary>
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/// 实时日志查看器 ViewModel，管理日志条目、过滤、自动滚动等逻辑
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/// Real-time log viewer ViewModel, manages log entries, filtering, auto-scroll, etc.
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/// </summary>
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public class RealTimeLogViewerViewModel : BindableBase
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{
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private readonly Dispatcher _dispatcher;
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private readonly ObservableCollection<LogDisplayEntry> _allEntries = new();
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private string _filterText = string.Empty;
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private bool _isAutoScroll = true;
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private int _maxLines = 2000;
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private int _totalCount;
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private int _filteredCount;
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private bool _showDebug = true;
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private bool _showInfo = true;
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private bool _showWarning = true;
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private bool _showError = true;
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private bool _showFatal = true;
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public RealTimeLogViewerViewModel()
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{
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_dispatcher = Application.Current?.Dispatcher ?? Dispatcher.CurrentDispatcher;
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FilteredEntries = new ObservableCollection<LogDisplayEntry>();
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ClearCommand = new DelegateCommand(ClearAll);
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}
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/// <summary>
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/// 过滤后的日志条目集合（绑定到 UI）| Filtered log entries (bound to UI)
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/// </summary>
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public ObservableCollection<LogDisplayEntry> FilteredEntries { get; }
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/// <summary>
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/// 过滤关键词 | Filter keyword
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/// </summary>
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public string FilterText
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{
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get => _filterText;
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set
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{
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if (SetProperty(ref _filterText, value))
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{
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ApplyFilter();
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}
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}
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}
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/// <summary>
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/// 是否自动滚动到底部 | Whether to auto-scroll to bottom
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/// </summary>
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public bool IsAutoScroll
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{
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get => _isAutoScroll;
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set => SetProperty(ref _isAutoScroll, value);
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}
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/// <summary>
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/// 最大行数限制 | Maximum line count limit
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/// </summary>
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public int MaxLines
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{
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get => _maxLines;
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set => SetProperty(ref _maxLines, value);
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}
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/// <summary>
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/// 总日志条数 | Total log entry count
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/// </summary>
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public int TotalCount
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{
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get => _totalCount;
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private set => SetProperty(ref _totalCount, value);
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}
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/// <summary>
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/// 过滤后的日志条数 | Filtered log entry count
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/// </summary>
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public int FilteredCount
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{
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get => _filteredCount;
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private set => SetProperty(ref _filteredCount, value);
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}
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/// <summary>
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/// 是否显示 Debug 级别日志 | Whether to show Debug level logs
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/// </summary>
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public bool ShowDebug
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{
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get => _showDebug;
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set { if (SetProperty(ref _showDebug, value)) ApplyFilter(); }
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}
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/// <summary>
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/// 是否显示 Info 级别日志 | Whether to show Information level logs
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/// </summary>
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public bool ShowInfo
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{
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get => _showInfo;
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set { if (SetProperty(ref _showInfo, value)) ApplyFilter(); }
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}
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/// <summary>
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/// 是否显示 Warning 级别日志 | Whether to show Warning level logs
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/// </summary>
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public bool ShowWarning
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{
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get => _showWarning;
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set { if (SetProperty(ref _showWarning, value)) ApplyFilter(); }
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}
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/// <summary>
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/// 是否显示 Error 级别日志 | Whether to show Error level logs
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/// </summary>
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public bool ShowError
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{
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get => _showError;
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set { if (SetProperty(ref _showError, value)) ApplyFilter(); }
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}
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/// <summary>
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/// 是否显示 Fatal 级别日志 | Whether to show Fatal level logs
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/// </summary>
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public bool ShowFatal
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{
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get => _showFatal;
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set { if (SetProperty(ref _showFatal, value)) ApplyFilter(); }
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}
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/// <summary>
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/// 状态栏文本 | Status bar text
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/// </summary>
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public string StatusText
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{
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get
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{
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bool hasLevelFilter = !(_showDebug && _showInfo && _showWarning && _showError && _showFatal);
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bool hasTextFilter = !string.IsNullOrEmpty(_filterText);
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if (hasLevelFilter || hasTextFilter)
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return LocalizationHelper.Get("LogViewer_StatusFiltered", TotalCount, FilteredCount);
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return LocalizationHelper.Get("LogViewer_StatusTotal", TotalCount);
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}
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}
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/// <summary>
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/// 清空日志命令 | Clear log command
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/// </summary>
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public DelegateCommand ClearCommand { get; }
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/// <summary>
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/// 自动滚动请求事件，View 层订阅此事件执行滚动 | Auto-scroll request event
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/// </summary>
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public event Action? ScrollToBottomRequested;
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/// <summary>
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/// 添加日志事件（线程安全，可从任意线程调用）| Add log event (thread-safe)
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/// </summary>
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public void AddLogEvent(LogEvent logEvent)
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{
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if (logEvent == null) return;
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var entry = new LogDisplayEntry(logEvent);
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if (_dispatcher.CheckAccess())
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{
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AddEntryInternal(entry);
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}
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else
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{
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_dispatcher.InvokeAsync(() => AddEntryInternal(entry));
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}
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}
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/// <summary>
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/// 内部添加日志条目 | Internal add log entry
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/// </summary>
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private void AddEntryInternal(LogDisplayEntry entry)
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{
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_allEntries.Add(entry);
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// 超出最大行数时移除最旧的条目 | Remove oldest entries when exceeding max lines
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while (_allEntries.Count > _maxLines)
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{
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var removed = _allEntries[0];
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_allEntries.RemoveAt(0);
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FilteredEntries.Remove(removed);
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}
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// 判断是否匹配过滤条件 | Check if entry matches filter
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if (MatchesFilter(entry))
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{
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FilteredEntries.Add(entry);
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}
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TotalCount = _allEntries.Count;
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FilteredCount = FilteredEntries.Count;
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RaisePropertyChanged(nameof(StatusText));
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// 请求自动滚动 | Request auto-scroll
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if (_isAutoScroll)
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{
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ScrollToBottomRequested?.Invoke();
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}
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}
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/// <summary>
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/// 应用过滤器 | Apply filter
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/// </summary>
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private void ApplyFilter()
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{
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FilteredEntries.Clear();
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foreach (var entry in _allEntries)
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{
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if (MatchesFilter(entry))
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{
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FilteredEntries.Add(entry);
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}
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}
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FilteredCount = FilteredEntries.Count;
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RaisePropertyChanged(nameof(StatusText));
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}
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/// <summary>
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/// 判断条目是否匹配过滤条件 | Check if entry matches filter
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/// </summary>
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private bool MatchesFilter(LogDisplayEntry entry)
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{
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// 级别过滤 | Level filter
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var levelMatch = entry.LevelFull switch
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{
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"Debug" => _showDebug,
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"Information" => _showInfo,
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"Warning" => _showWarning,
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"Error" => _showError,
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"Fatal" => _showFatal,
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_ => true
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};
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if (!levelMatch) return false;
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// 关键词过滤 | Keyword filter
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if (string.IsNullOrWhiteSpace(_filterText)) return true;
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return entry.Message.Contains(_filterText, StringComparison.OrdinalIgnoreCase)
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|| entry.Level.Contains(_filterText, StringComparison.OrdinalIgnoreCase)
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|| entry.Source.Contains(_filterText, StringComparison.OrdinalIgnoreCase);
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}
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/// <summary>
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/// 清空所有日志 | Clear all logs
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/// </summary>
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private void ClearAll()
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{
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_allEntries.Clear();
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FilteredEntries.Clear();
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TotalCount = 0;
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FilteredCount = 0;
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RaisePropertyChanged(nameof(StatusText));
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}
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}
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/// <summary>
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/// 日志显示条目模型 | Log display entry model
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/// </summary>
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public class LogDisplayEntry
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{
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public LogDisplayEntry(LogEvent logEvent)
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{
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Timestamp = logEvent.Timestamp.LocalDateTime;
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TimestampDisplay = Timestamp.ToString("HH:mm:ss.fff");
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Level = logEvent.Level.ToString().Substring(0, 3).ToUpper();
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LevelFull = logEvent.Level.ToString();
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// 渲染消息文本 | Render message text
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Message = logEvent.RenderMessage();
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// 如果有异常，追加异常信息 | Append exception info if present
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if (logEvent.Exception != null)
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{
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Message += Environment.NewLine + logEvent.Exception.ToString();
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}
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// 提取 SourceContext | Extract SourceContext
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if (logEvent.Properties.TryGetValue("SourceContext", out var sourceValue))
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{
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Source = sourceValue.ToString().Trim('"');
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}
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else
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{
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Source = string.Empty;
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}
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// 根据日志级别设置颜色 | Set color based on log level
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LevelColor = logEvent.Level switch
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{
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LogEventLevel.Fatal => new SolidColorBrush(Color.FromRgb(180, 0, 0)),
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LogEventLevel.Error => new SolidColorBrush(Colors.Red),
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LogEventLevel.Warning => new SolidColorBrush(Color.FromRgb(200, 130, 0)),
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LogEventLevel.Debug => new SolidColorBrush(Colors.Gray),
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LogEventLevel.Verbose => new SolidColorBrush(Colors.LightGray),
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_ => new SolidColorBrush(Color.FromRgb(30, 30, 30))
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};
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// Freeze 画刷，使其可跨线程访问（避免 DependencySource 线程异常）
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// Freeze the brush so it can be accessed from any thread
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LevelColor.Freeze();
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}
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public DateTime Timestamp { get; }
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public string TimestampDisplay { get; }
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public string Level { get; }
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public string LevelFull { get; }
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public string Message { get; }
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public string Source { get; }
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public SolidColorBrush LevelColor { get; }
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}
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}
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