refactor(4): TabViewService extracts WebView2 lifecycle/wiring from MainWindow (god-class dissolved) - all 66 tests incl. tab E2E stay GREEN

VideoDownloader.App/MainWindow.xaml.cs

@@ -30,7 +30,6 @@ public partial class MainWindow : Window
     // ---- 탭 아키텍처 (Phase A) ----
     private CoreWebView2Environment? _env;
     private TabManager _tabs = null!;
-    private readonly Dictionary<TabItem, Task> _tabInit = new();
     internal TabManager Tabs => _tabs;
     internal Wv2.WebView2? ActiveView => _tabs?.ActiveTab?.View;
     private CoreWebView2? Cv => _tabs?.ActiveTab?.Core;
@@ -162,7 +161,21 @@ public partial class MainWindow : Window
         }
         catch (Exception ex) { Log($"WebView2 초기화 실패: {ex.Message}"); return; }
 
-        _tabs = new TabManager(CreateTabItem, AttachTabView);
+        _views = new Services.TabViewService(_env!, _config, TabHost, _zoomStore, Dispatcher)
+        {
+            NewTabProvider = () => Task.FromResult(_tabs.NewTab(activate: false)),
+        };
+        _views.TabCoreReady += (_, cv) => cv.WebResourceResponseReceived += OnResponseReceived; // 미디어 감지
+        _views.DownloadStarting += OnDownloadStarting;
+        _views.UrlChanged += OnUrlChanged;
+        _views.TitleChanged += OnTitleChanged;
+        _views.HistoryChanged += UpdateNavState;
+        _views.FindStateChanged += tab =>
+        {
+            if (tab.FindSession != null) FindStatus.Text = tab.FindSession.StatusText;
+        };
+
+        _tabs = new TabManager(() => new TabItem(), _views.AttachView);
         _tabs.ActiveChanged += OnActiveTabChanged;
         _tabs.TabRemoved += OnTabRemoved;
         TabList.ItemsSource = _tabs.Tabs;
@@ -177,65 +190,19 @@ public partial class MainWindow : Window
         UpdateNavState();
     }
 
-    private TabItem CreateTabItem() => new();
+    /// <summary>탭별 WebView2 생명주기·배선 전담 서비스(재구성 ④).</summary>
+    private Services.TabViewService? _views;
 
-    /// <summary>탭에 WebView2 뷰를 붙이고 비동기 초기화를 시작한다. (UI 스레드)</summary>
+    private void OnUrlChanged(TabItem tab, string url)
-    private void AttachTabView(TabItem tab)
     {
-        var view = new Wv2.WebView2 { DefaultBackgroundColor = System.Drawing.Color.Black };
-        tab.View = view;
-        TabHost.Children.Add(view);
-        view.Visibility = tab.IsActive ? Visibility.Visible : Visibility.Collapsed;
-        _tabInit[tab] = InitTabCoreAsync(tab);
-    }
-
-    /// <summary>탭의 CoreWebView2 초기화 + 탭별 이벤트 배선 + 초기 URL 탐색.</summary>
-    private async Task InitTabCoreAsync(TabItem tab)
-    {
-        try
-        {
-            var options = _env!.CreateCoreWebView2ControllerOptions();
-            if (_config.PrivateMode) options.IsInPrivateModeEnabled = true; // InPrivate: 디스크에 아무것도 저장 안 함
-            await tab.View!.EnsureCoreWebView2Async(_env, options);
-        }
-        catch (Exception ex)
-        {
-            Log($"탭 초기화 실패: {ex.Message}");
-            return;
-        }
-
-        var cv = tab.Core!;
-        cv.Settings.AreDevToolsEnabled = true;
-
-        // T1-3 탭별 검색 세션 (네이티브 Find API)
-        tab.FindSession = new FindSession(new WebView2FindApi(cv, _env!));
-        tab.FindSession.StateChanged += () => Dispatcher.BeginInvoke(new Action(() =>
-        {
-            if (tab.IsActive && tab.FindSession != null) FindStatus.Text = tab.FindSession.StatusText;
-        }));
-
-        // 탭별 네비게이션 상태
-        cv.NavigationStarting += (_, _) => Dispatcher.BeginInvoke(new Action(() => tab.IsLoading = true));
-        cv.NavigationCompleted += (_, _) => Dispatcher.BeginInvoke(new Action(() =>
-        {
-            tab.IsLoading = false;
-            try { if (tab.View != null) tab.View.ZoomFactor = _zoomStore.Get(cv.Source); } catch { } // T1-7
-        }));
-        cv.HistoryChanged += (_, _) => UpdateNavState();
-
-        // 소셜/주소창/기록: 탭별 상태로 관리
-        cv.SourceChanged += (_, _) => Dispatcher.BeginInvoke(new Action(() =>
-        {
-            var url = cv.Source ?? "";
-            tab.Url = url;
         if (tab.PendingHistoryUrl != null) RecordHistory(tab.PendingHistoryUrl, tab.PendingHistoryUrl);
         if (tab.IsActive && !AddressBox.IsKeyboardFocused) AddressBox.Text = url;
         tab.PendingHistoryUrl = url.StartsWith("about:", StringComparison.OrdinalIgnoreCase) ? null : url;
         DetectSocial(tab, url);
-        }));
+    }
-        cv.DocumentTitleChanged += (_, _) => Dispatcher.BeginInvoke(new Action(() =>
+
+    private void OnTitleChanged(TabItem tab, string title)
     {
-            var title = cv.DocumentTitle ?? "";
         tab.Title = string.IsNullOrWhiteSpace(title) ? (tab.Url.StartsWith("http") ? tab.Url : "새 탭") : title;
         if (tab.PendingHistoryUrl != null)
         {
@@ -248,48 +215,9 @@ public partial class MainWindow : Window
             _manager.RenameSocial(new Uri(tab.PendingSocialUrl), title);
             tab.PendingSocialUrl = null;
         }
-        }));
-
-        // T1-8 오디오 표시/뮤트
-        try
-        {
-            cv.IsDocumentPlayingAudioChanged += (_, _) => Dispatcher.BeginInvoke(new Action(() =>
-            {
-                try { tab.IsAudioPlaying = cv.IsDocumentPlayingAudio; } catch { }
-            }));
-            cv.IsMutedChanged += (_, _) => Dispatcher.BeginInvoke(new Action(() =>
-            {
-                try { tab.IsMuted = cv.IsMuted; } catch { }
-            }));
     }
-        catch { } // 구현체/타이밍 이슈 대비
 
-        // 미디어 감지(탭 무관 전역)
+    private void OnDownloadStarting(CoreWebView2 cv, CoreWebView2DownloadStartingEventArgs de)
-        cv.WebResourceResponseReceived += OnResponseReceived;
-
-        // Phase A: 팝업/새창 → 새 탭 (deferral 필수 — 탭 생성이 비동기)
-        cv.NewWindowRequested += async (_, ne) =>
-        {
-            try
-            {
-                var deferral = ne.GetDeferral();
-                try
-                {
-                    var newTab = _tabs.NewTab(activate: false); // URL 없이 생성 → 팝업 내용이 새 창으로 흘러들어옴
-                    await WaitTabReady(newTab);
-                    ne.NewWindow = newTab.Core;
-                    ne.Handled = true;
-                }
-                finally { deferral.Complete(); }
-            }
-            catch
-            {
-                try { ne.Handled = true; if (ne.Uri != null) cv.Navigate(ne.Uri); } catch { }
-            }
-        };
-
-        // #13 페이지 내 다운로드(a[download])를 저장 폴더로 라우팅
-        cv.DownloadStarting += (_, de) =>
     {
         try
         {
@@ -301,23 +229,6 @@ public partial class MainWindow : Window
             _manager.LogPanel($"📥 페이지 다운로드 → 저장 폴더: {fn}");
         }
         catch { }
-        };
-
-        // 초기 URL (세션 복원/빈 탭 제외)
-        if (!string.IsNullOrEmpty(tab.Url) && (cv.Source == null || cv.Source.Length == 0))
-        {
-            try { cv.Navigate(tab.Url); } catch { }
-        }
-    }
-
-    /// <summary>탭의 CoreWebView2 초기화 완료 대기 (뉴윈도우 deferral 용).</summary>
-    private async Task WaitTabReady(TabItem tab)
-    {
-        if (tab.Core != null) return;
-        if (_tabInit.TryGetValue(tab, out var t)) { try { await t; } catch { } return; }
-        var sw = System.Diagnostics.Stopwatch.StartNew();
-        while (tab.Core == null && sw.ElapsedMilliseconds < 15000)
-            await Task.Delay(50);
     }
 
     private void OnActiveTabChanged(TabItem tab)
@@ -328,15 +239,7 @@ public partial class MainWindow : Window
         UpdateNavState();
     }
 
-    private void OnTabRemoved(TabItem tab)
+    private void OnTabRemoved(TabItem tab) => _views?.RemoveView(tab);
-    {
-        if (tab.View != null)
-        {
-            TabHost.Children.Remove(tab.View);
-            tab.View = null; // 재오픈 시 새 뷰로 재생성(ReopenClosedTab → AttachTabView)
-        }
-        _tabInit.Remove(tab);
-    }
 
     private void UpdateNavState()
     {

VideoDownloader.App/Services/TabViewService.cs

@@ -0,0 +1,184 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Threading;
+using Microsoft.Web.WebView2.Core;
+using VideoDownloader.Browser;
+using VideoDownloader.Browser.Tabs;
+using VideoDownloader.Core.Config;
+using Wv2 = Microsoft.Web.WebView2.Wpf;
+using TabItem = VideoDownloader.Browser.Tabs.TabItem;
+
+namespace VideoDownloader.App.Services;
+
+/// <summary>
+/// 탭별 WebView2 생명주기·이벤트 배선 전담(재구성 ④ — MainWindow 갓-클래스 해체).
+/// 일반 브라우저 동작(제목/URL/로딩/오디오/검색세션/줌 적용/초기 탐색/뉴윈도우→탭)은
+/// 이 서비스가, 앱 고유 기능(미디어 감지/다운로드 라우팅/소셜/기록/주소창 반영)은
+/// 이벤트 훅으로 호스트(MainWindow)가 주입한다.
+/// </summary>
+public sealed class TabViewService
+{
+    private readonly CoreWebView2Environment _env;
+    private readonly AppConfig _config;
+    private readonly Panel _host;
+    private readonly SiteZoomStore _zoomStore;
+    private readonly Dispatcher _dispatcher;
+    private readonly Dictionary<TabItem, Task> _init = new();
+
+    /// <summary>뉴윈도우(팝업) 요청 시 새 탭을 만들어 반환하는 공급자(호스트가 TabManager 에 연결).</summary>
+    public Func<Task<TabItem>>? NewTabProvider { get; set; }
+
+    /// <summary>탭 CoreWebView2 초기화 완료(호스트가 감지 등 탭별 구독 부착).</summary>
+    public event Action<TabItem, CoreWebView2>? TabCoreReady;
+
+    /// <summary>페이지 내 a[download] 등 다운로드 시작(호스트가 저장 폴더로 라우팅).</summary>
+    public event Action<CoreWebView2, CoreWebView2DownloadStartingEventArgs>? DownloadStarting;
+
+    /// <summary>URL 확정(SourceChanged). 인자: (탭, url).</summary>
+    public event Action<TabItem, string>? UrlChanged;
+
+    /// <summary>문서 타이틀 확정(DocumentTitleChanged). 인자: (탭, title).</summary>
+    public event Action<TabItem, string>? TitleChanged;
+
+    /// <summary>탭 뒤로/앞으로 가능 상태 변화(네비 버튼 갱신용).</summary>
+    public event Action? HistoryChanged;
+
+    public TabViewService(CoreWebView2Environment env, AppConfig config, Panel host,
+        SiteZoomStore zoomStore, Dispatcher dispatcher)
+    {
+        _env = env;
+        _config = config;
+        _host = host;
+        _zoomStore = zoomStore;
+        _dispatcher = dispatcher;
+    }
+
+    public TabItem CreateTabItem() => new();
+
+    /// <summary>탭에 WebView2 뷰를 붙이고 비동기 초기화를 시작한다. (UI 스레드)</summary>
+    public void AttachView(TabItem tab)
+    {
+        var view = new Wv2.WebView2 { DefaultBackgroundColor = System.Drawing.Color.Black };
+        tab.View = view;
+        _host.Children.Add(view);
+        view.Visibility = tab.IsActive ? Visibility.Visible : Visibility.Collapsed;
+        _init[tab] = InitCoreAsync(tab);
+    }
+
+    /// <summary>탭의 CoreWebView2 초기화 완료 대기 (뉴윈도우 deferral 용).</summary>
+    public async Task WaitTabReady(TabItem tab)
+    {
+        if (tab.Core != null) return;
+        if (_init.TryGetValue(tab, out var t)) { try { await t; } catch { } return; }
+        var sw = System.Diagnostics.Stopwatch.StartNew();
+        while (tab.Core == null && sw.ElapsedMilliseconds < 15000)
+            await Task.Delay(50);
+    }
+
+    /// <summary>탭 제거 시 뷰를 호스트에서 떼고 재오픈 가능 상태로(null) 만든다.</summary>
+    public void RemoveView(TabItem tab)
+    {
+        if (tab.View != null)
+        {
+            _host.Children.Remove(tab.View);
+            tab.View = null; // 재오픈 시 새 뷰로 재생성(ReopenClosedTab → AttachView)
+        }
+        _init.Remove(tab);
+    }
+
+    private async Task InitCoreAsync(TabItem tab)
+    {
+        try
+        {
+            var options = _env.CreateCoreWebView2ControllerOptions();
+            if (_config.PrivateMode) options.IsInPrivateModeEnabled = true; // InPrivate: 디스크에 아무것도 저장 안 함
+            await tab.View!.EnsureCoreWebView2Async(_env, options);
+        }
+        catch (Exception)
+        {
+            return; // 초기화 실패 탭 — 호스트가 로그 표시는 TitleChanged 로 알림 없이 둔다(기존 동작)
+        }
+
+        var cv = tab.Core!;
+        cv.Settings.AreDevToolsEnabled = true;
+
+        // 탭별 검색 세션 (네이티브 Find API)
+        tab.FindSession = new FindSession(new WebView2FindApi(cv, _env));
+        tab.FindSession.StateChanged += () => _dispatcher.BeginInvoke(new Action(() =>
+        {
+            if (tab.IsActive && tab.FindSession != null) FindStateChanged?.Invoke(tab);
+        }));
+
+        // 네비게이션 상태
+        cv.NavigationStarting += (_, _) => _dispatcher.BeginInvoke(new Action(() => tab.IsLoading = true));
+        cv.NavigationCompleted += (_, _) => _dispatcher.BeginInvoke(new Action(() =>
+        {
+            tab.IsLoading = false;
+            try { if (tab.View != null) tab.View.ZoomFactor = _zoomStore.Get(cv.Source); } catch { } // T1-7 사이트별 줌
+        }));
+        cv.HistoryChanged += (_, _) => HistoryChanged?.Invoke();
+
+        cv.SourceChanged += (_, _) => _dispatcher.BeginInvoke(new Action(() =>
+        {
+            var url = cv.Source ?? "";
+            tab.Url = url;
+            UrlChanged?.Invoke(tab, url);
+        }));
+        cv.DocumentTitleChanged += (_, _) => _dispatcher.BeginInvoke(new Action(() =>
+        {
+            TitleChanged?.Invoke(tab, cv.DocumentTitle ?? "");
+        }));
+
+        // T1-8 오디오 표시/뮤트
+        try
+        {
+            cv.IsDocumentPlayingAudioChanged += (_, _) => _dispatcher.BeginInvoke(new Action(() =>
+            {
+                try { tab.IsAudioPlaying = cv.IsDocumentPlayingAudio; } catch { }
+            }));
+            cv.IsMutedChanged += (_, _) => _dispatcher.BeginInvoke(new Action(() =>
+            {
+                try { tab.IsMuted = cv.IsMuted; } catch { }
+            }));
+        }
+        catch { }
+
+        // 뉴윈도우(팝업) → 새 탭 (deferral 필수 — 탭 생성이 비동기)
+        cv.NewWindowRequested += async (_, ne) =>
+        {
+            try
+            {
+                var deferral = ne.GetDeferral();
+                try
+                {
+                    var newTab = NewTabProvider != null ? await NewTabProvider() : null;
+                    if (newTab != null)
+                    {
+                        await WaitTabReady(newTab);
+                        ne.NewWindow = newTab.Core;
+                    }
+                    ne.Handled = true;
+                }
+                finally { deferral.Complete(); }
+            }
+            catch
+            {
+                try { ne.Handled = true; if (ne.Uri != null) cv.Navigate(ne.Uri); } catch { }
+            }
+        };
+
+        // 페이지 내 다운로드 → 호스트 훅
+        cv.DownloadStarting += (_, de) => DownloadStarting?.Invoke(cv, de);
+
+        // 초기 URL (세션 복원)
+        if (!string.IsNullOrEmpty(tab.Url) && string.IsNullOrEmpty(cv.Source))
+        {
+            try { cv.Navigate(tab.Url); } catch { }
+        }
+
+        TabCoreReady?.Invoke(tab, cv);
+    }
+
+    /// <summary>활성 탭 검색 상태 표시 요청(FindStatus 텍스트 갱신 — 호스트가 구독).</summary>
+    public event Action<TabItem>? FindStateChanged;
+}