BASE changed interface
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using System.Collections.ObjectModel;
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using System.Diagnostics;
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using System.IO;
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using System.Text.Json;
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using System.Windows;
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using System.Windows.Controls;
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using Microsoft.Web.WebView2.Core;
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using Microsoft.Web.WebView2.Wpf;
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namespace FoxBrowser.Core;
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public sealed class TabManager : IAsyncDisposable
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{
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private static readonly string[] BlockedHosts =
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{
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"doubleclick.net", "googlesyndication.com", "googleadservices.com", "adservice.google.com",
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"googletagmanager.com", "google-analytics.com", "analytics.google.com", "facebook.net",
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"connect.facebook.net", "hotjar.com", "segment.io", "amplitude.com", "scorecardresearch.com",
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"adsrvr.org", "adnxs.com", "taboola.com", "outbrain.com"
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};
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private readonly Grid _host;
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private readonly CoreWebView2Environment _environment;
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private readonly WebView2 _view;
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private bool _audioOnly;
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private bool _minimizedMode;
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private bool _navigationInProgress;
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private bool _switchInProgress;
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public TabManager(Grid host, CoreWebView2Environment environment, bool extensionsAvailable = true)
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{
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_host = host;
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_environment = environment;
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ExtensionsAvailable = extensionsAvailable;
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_view = new WebView2 { Visibility = Visibility.Visible };
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_host.Children.Add(_view);
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}
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public ObservableCollection<BrowserTab> Tabs { get; } = new();
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public BrowserTab? ActiveTab { get; private set; }
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public bool IsMinimizedMode => _minimizedMode;
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public bool ExtensionsAvailable { get; private set; }
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public CoreWebView2Environment Environment => _environment;
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public WebView2 View => _view;
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public ExtensionManager? ExtensionManager { get; private set; }
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public event EventHandler? ActiveTabStateChanged;
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public async Task InitializeAsync()
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{
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await _view.EnsureCoreWebView2Async(_environment);
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try
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{
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ExtensionManager = new ExtensionManager(_view.CoreWebView2.Profile);
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await ExtensionManager.RefreshAsync();
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}
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catch
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{
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ExtensionManager = null;
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ExtensionsAvailable = false;
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}
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ConfigureResourceFirewall(_view.CoreWebView2);
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_view.CoreWebView2.NavigationStarting += OnNavigationStarting;
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_view.CoreWebView2.NavigationCompleted += OnNavigationCompleted;
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_view.CoreWebView2.DocumentTitleChanged += OnDocumentTitleChanged;
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_view.CoreWebView2.IsDocumentPlayingAudioChanged += OnAudioStateChanged;
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_view.CoreWebView2.HistoryChanged += OnHistoryChanged;
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await RestoreSessionOrDefaultAsync();
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}
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public async Task SaveSessionAsync()
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{
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var activeIndex = ActiveTab is not null ? Tabs.IndexOf(ActiveTab) : 0;
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await SessionStore.SaveAsync(Tabs, activeIndex);
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}
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private async Task RestoreSessionOrDefaultAsync()
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{
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var session = await SessionStore.LoadAsync();
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if (session is null || session.Tabs.Count == 0)
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{
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await AddTabAsync();
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return;
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}
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BrowserTab? activeTab = null;
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for (int i = 0; i < session.Tabs.Count; i++)
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{
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var snap = session.Tabs[i];
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var tab = new BrowserTab(snap.Address)
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{
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Title = snap.Title,
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IsAudioOnly = snap.IsAudioOnly,
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ScrollY = snap.ScrollY,
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MediaPosition = snap.MediaPosition,
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WasPlaying = snap.WasPlaying,
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};
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Tabs.Add(tab);
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if (i == session.ActiveTabIndex) activeTab = tab;
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}
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await SwitchToTabAsync(activeTab ?? Tabs[0]);
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}
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public async Task<BrowserTab> AddTabAsync(string address = "https://www.google.com")
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{
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var tab = new BrowserTab(NormalizeAddress(address));
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Tabs.Add(tab);
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await SwitchToTabAsync(tab);
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return tab;
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}
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public async Task SwitchToTabAsync(BrowserTab? tab)
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{
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if (tab is null || !Tabs.Contains(tab)) return;
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var core = _view.CoreWebView2;
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if (core is null || ReferenceEquals(ActiveTab, tab) || _switchInProgress) return;
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_switchInProgress = true;
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try
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{
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if (ActiveTab is not null) await CaptureActiveStateAsync();
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ActiveTab = tab;
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_audioOnly = tab.IsAudioOnly;
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ActiveTabStateChanged?.Invoke(this, EventArgs.Empty);
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_navigationInProgress = true;
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core.Navigate(tab.Address);
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await Task.Yield();
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}
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finally { _switchInProgress = false; }
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}
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public async Task NavigateAsync(BrowserTab tab, string address)
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{
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if (!Tabs.Contains(tab)) return;
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var core = _view.CoreWebView2;
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if (core is null) return;
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tab.Address = NormalizeAddress(address);
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if (ActiveTab != tab) { await SwitchToTabAsync(tab); return; }
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_navigationInProgress = true;
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core.Navigate(tab.Address);
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}
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public Task OpenExtensionOptionsAsync(string extensionId)
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{
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var core = _view.CoreWebView2;
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if (core is null || string.IsNullOrWhiteSpace(extensionId)) return Task.CompletedTask;
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core.Navigate($"chrome-extension://{extensionId}/options.html");
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return Task.CompletedTask;
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}
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public async Task OpenUrlAsync(string address)
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{
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if (ActiveTab is null) return;
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if (address.StartsWith("chrome-extension://", StringComparison.OrdinalIgnoreCase))
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{
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var core = _view.CoreWebView2;
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if (core is null) return;
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ActiveTab.Address = address;
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core.Navigate(address);
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return;
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}
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await NavigateAsync(ActiveTab, address);
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}
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public async Task ToggleAudioOnlyAsync()
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{
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if (ActiveTab is null) return;
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_audioOnly = !_audioOnly;
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ActiveTab.IsAudioOnly = _audioOnly;
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await ApplyLightweightPageModeAsync(_audioOnly || _minimizedMode);
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}
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public async Task SetMinimizedModeAsync(bool enabled)
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{
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_minimizedMode = enabled;
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await ApplyLightweightPageModeAsync(enabled || _audioOnly);
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}
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public async Task SoftReloadIfNeededAsync(long thresholdBytes = 850L * 1024 * 1024)
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{
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using var process = Process.GetCurrentProcess();
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if (process.WorkingSet64 < thresholdBytes || ActiveTab is null || _navigationInProgress) return;
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await CaptureActiveStateAsync();
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_navigationInProgress = true;
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_view.CoreWebView2?.Navigate(ActiveTab.Address);
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}
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public void GoBack() { var core = _view.CoreWebView2; if (core?.CanGoBack == true) core.GoBack(); }
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public void GoForward() { var core = _view.CoreWebView2; if (core?.CanGoForward == true) core.GoForward(); }
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public void Reload() { var core = _view.CoreWebView2; if (core is null) return; _navigationInProgress = true; core.Reload(); }
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public void CloseTab(BrowserTab tab)
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{
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var index = Tabs.IndexOf(tab);
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Tabs.Remove(tab);
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if (Tabs.Count == 0) { _ = AddTabAsync(); return; }
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if (ActiveTab == tab) _ = SwitchToTabAsync(Tabs[Math.Min(index, Tabs.Count - 1)]);
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_ = SaveSessionAsync();
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}
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public async ValueTask DisposeAsync()
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{
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if (ActiveTab is not null) await CaptureActiveStateAsync();
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await SaveSessionAsync();
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_view.Dispose();
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}
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private void OnNavigationStarting(object? sender, CoreWebView2NavigationStartingEventArgs e)
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{
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if (_minimizedMode && !_navigationInProgress) e.Cancel = true;
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if (ActiveTab is not null) ActiveTab.IsLoading = true;
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}
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private async void OnNavigationCompleted(object? sender, CoreWebView2NavigationCompletedEventArgs e)
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{
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_navigationInProgress = false;
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if (ActiveTab is null) return;
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ActiveTab.IsLoading = false;
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ActiveTab.Address = _view.Source?.ToString() ?? ActiveTab.Address;
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ActiveTab.Title = string.IsNullOrWhiteSpace(_view.CoreWebView2.DocumentTitle) ? "Нова вкладка" : _view.CoreWebView2.DocumentTitle;
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ActiveTabStateChanged?.Invoke(this, EventArgs.Empty);
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await ApplyLightweightPageModeAsync(_audioOnly || _minimizedMode);
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await RestoreActiveStateAsync();
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await SaveSessionAsync();
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}
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private void OnDocumentTitleChanged(object? sender, object e)
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{
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if (ActiveTab is not null) ActiveTab.Title = string.IsNullOrWhiteSpace(_view.CoreWebView2.DocumentTitle) ? "Нова вкладка" : _view.CoreWebView2.DocumentTitle;
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}
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private void OnAudioStateChanged(object? sender, object e)
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{
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if (ActiveTab is not null) ActiveTab.IsPlayingAudio = _view.CoreWebView2.IsDocumentPlayingAudio;
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}
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private void OnHistoryChanged(object? sender, object e)
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{
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if (ActiveTab is null) return;
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var current = _view.CoreWebView2.Source;
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if (string.IsNullOrEmpty(current) || current == ActiveTab.Address) return;
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ActiveTab.Address = current;
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ActiveTabStateChanged?.Invoke(this, EventArgs.Empty);
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_ = SaveSessionAsync();
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}
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private async Task CaptureActiveStateAsync()
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{
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if (ActiveTab is null || _view.CoreWebView2 is null) return;
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try
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{
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var json = await _view.CoreWebView2.ExecuteScriptAsync("JSON.stringify({scrollY:window.scrollY, media:[...document.querySelectorAll('video,audio')].map(x=>({time:x.currentTime||0,playing:!x.paused}))})");
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var payload = JsonSerializer.Deserialize<string>(json);
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if (string.IsNullOrWhiteSpace(payload)) return;
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using var doc = JsonDocument.Parse(payload);
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if (doc.RootElement.TryGetProperty("scrollY", out var scroll)) ActiveTab.ScrollY = scroll.GetDouble();
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if (doc.RootElement.TryGetProperty("media", out var media) && media.GetArrayLength() > 0)
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{
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var first = media[0];
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if (first.TryGetProperty("time", out var time)) ActiveTab.MediaPosition = time.GetDouble();
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if (first.TryGetProperty("playing", out var playing)) ActiveTab.WasPlaying = playing.GetBoolean();
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}
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}
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catch (JsonException) { }
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}
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private async Task RestoreActiveStateAsync()
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{
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if (ActiveTab is null || _view.CoreWebView2 is null) return;
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var scroll = ActiveTab.ScrollY.ToString(System.Globalization.CultureInfo.InvariantCulture);
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var position = ActiveTab.MediaPosition.ToString(System.Globalization.CultureInfo.InvariantCulture);
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var resume = ActiveTab.WasPlaying ? ".play().catch(()=>{});" : "";
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var script = $"(() => {{ const restore=()=>{{ window.scrollTo(0,{scroll}); document.querySelectorAll('video,audio').forEach(x=>{{ try {{ x.currentTime={position}; {resume} }} catch {{}} }}); }}; restore(); setTimeout(restore,300); setTimeout(restore,1000); }})();";
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await _view.CoreWebView2.ExecuteScriptAsync(script);
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}
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private void ConfigureResourceFirewall(CoreWebView2 core)
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{
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core.AddWebResourceRequestedFilter("*", CoreWebView2WebResourceContext.All);
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core.WebResourceRequested += OnWebResourceRequested;
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}
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private void OnWebResourceRequested(object? sender, CoreWebView2WebResourceRequestedEventArgs e)
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{
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var uri = e.Request.Uri;
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var host = Uri.TryCreate(uri, UriKind.Absolute, out var parsed) ? parsed.Host : string.Empty;
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var blockedHost = BlockedHosts.Any(x => host.Equals(x, StringComparison.OrdinalIgnoreCase) || host.EndsWith("." + x, StringComparison.OrdinalIgnoreCase));
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var visualWaste = _audioOnly || _minimizedMode;
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var blockedContext = visualWaste && (e.ResourceContext is CoreWebView2WebResourceContext.Image or CoreWebView2WebResourceContext.Font);
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var thirdPartyFrame = visualWaste && (uri.Contains("/embed/", StringComparison.OrdinalIgnoreCase) || host.Contains("livechat", StringComparison.OrdinalIgnoreCase));
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if (!blockedHost && !blockedContext && !thirdPartyFrame) return;
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e.Response = _view.CoreWebView2.Environment.CreateWebResourceResponse(new MemoryStream(Array.Empty<byte>()), 204, "No Content", "");
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}
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private async Task ApplyLightweightPageModeAsync(bool enabled)
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{
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if (_view.CoreWebView2 is null) return;
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var script = enabled
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? """
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(()=>{let s=document.getElementById('fox-lightweight');if(!s){s=document.createElement('style');s.id='fox-lightweight';s.textContent='img,picture,svg,canvas{display:none!important}video{width:1px!important;height:1px!important;opacity:0!important;position:fixed!important;left:-10000px!important;top:-10000px!important}';document.documentElement.appendChild(s)};document.querySelectorAll('link[rel="preload"],link[rel="prefetch"],link[rel="next"]').forEach(x=>x.remove());})();
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"""
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: "document.getElementById('fox-lightweight')?.remove();";
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await _view.CoreWebView2.ExecuteScriptAsync(script);
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}
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private static string NormalizeAddress(string value)
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{
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var text = value.Trim();
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if (string.IsNullOrEmpty(text)) return "https://www.google.com";
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if (Uri.TryCreate(text, UriKind.Absolute, out var uri) && (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)) return text;
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return $"https://www.google.com/search?q={Uri.EscapeDataString(text)}";
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}
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}
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