generated from dellevin/template
730 lines
25 KiB
Dart
730 lines
25 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:url_launcher/url_launcher.dart';
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import '../../data/database_helper.dart';
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import '../../services/epub/epub_theme.dart';
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import '../../services/epub/epub_webview_handler.dart';
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import '../../services/epub/epub_stream_service.dart';
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import '../../services/epub/epub_parser.dart';
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import '../../services/epub/reader_settings.dart';
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import '../../data/epub/reader_models.dart';
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import '../../data/epub/reader_dao.dart';
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import '../../utils/toast_util.dart';
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import 'book_session.dart';
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import 'reader_renderer.dart';
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import 'reader_webview.dart';
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import 'control_panel.dart';
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import 'toc_drawer.dart';
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import 'image_viewer.dart';
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import 'footnote_popup.dart';
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import 'search_sheet.dart';
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import 'epub_selection_toolbar.dart';
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import 'selection_handles.dart';
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part 'mixins/spine_navigation_mixin.dart';
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part 'mixins/page_navigation_mixin.dart';
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part 'mixins/progress_mixin.dart';
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part 'mixins/theme_mixin.dart';
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part 'mixins/link_handling_mixin.dart';
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part 'mixins/image_viewer_mixin.dart';
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part 'mixins/footnote_mixin.dart';
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part 'mixins/text_selection_mixin.dart';
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/// Reads EPUB directly from compressed file without extraction.
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class ReaderScreen extends StatefulWidget {
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final String bookId;
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final String filePath;
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final String title;
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final String? coverPath;
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final Map<String, dynamic>? bookData;
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final int? initialSpineIndex;
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final String? scrollToXPath;
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final String? scrollToText;
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const ReaderScreen({
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super.key,
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required this.bookId,
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required this.filePath,
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required this.title,
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this.coverPath,
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this.bookData,
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this.initialSpineIndex,
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this.scrollToXPath,
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this.scrollToText,
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});
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@override
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State<ReaderScreen> createState() => _ReaderScreenState();
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}
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class _ReaderScreenState extends State<ReaderScreen>
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with
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WidgetsBindingObserver,
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_SpineNavigationMixin,
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_PageNavigationMixin,
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_ProgressMixin,
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_ThemeMixin,
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_LinkHandlingMixin,
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_ImageViewerMixin,
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_FootnoteMixin,
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_TextSelectionMixin {
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@override
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late final EpubWebViewHandler webViewHandler;
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@override
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late final BookSession bookSession;
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@override
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final ReaderRendererController rendererController =
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ReaderRendererController();
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// Core UI state
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@override
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bool isWebViewLoading = true;
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@override
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bool showControls = false;
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// WebView visibility control for smoother transitions
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Animation<double>? routeAnimation;
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bool shouldShowWebView = false;
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// Spine navigation state (used by _SpineNavigationMixin)
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@override
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int currentSpineItemIndex = 0;
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// Pagination state (used by _PageNavigationMixin)
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@override
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int currentPageInChapter = 0;
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@override
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int totalPagesInChapter = 1;
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// Progress state (used by _ProgressMixin)
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@override
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String displayProgress = '';
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@override
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Timer? progressDebouncer;
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final Map<int, int> _chapterPageCounts = {};
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@override
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Map<int, int> get chapterPageCounts => _chapterPageCounts;
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// Theme state (used by _ThemeMixin)
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@override
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ThemeData? currentTheme;
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@override
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bool updatingTheme = false;
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@override
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Timer? themeUpdateDebouncer;
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@override
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ReaderSettings readerSettings = const ReaderSettings();
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// Image viewer state (used by _ImageViewerMixin)
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@override
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bool isImageViewerVisible = false;
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@override
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Uint8List? currentImageData;
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@override
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Rect? currentImageRect;
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// Footnote state (used by _FootnoteMixin)
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@override
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OverlayEntry? footnoteOverlayEntry;
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@override
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final GlobalKey<FootnotePopupOverlayState> footnoteKey =
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GlobalKey<FootnotePopupOverlayState>();
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@override
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bool isClosingFootnote = false;
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final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
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bool tocDrawerOpen = false;
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bool styleDrawerOpen = false;
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AppLifecycleState? lastLifecycleState = AppLifecycleState.resumed;
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// 等待分栏布局完成
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Completer<void>? _pageCountReadyCompleter;
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@override
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Completer<void>? get pageCountReadyCompleter => _pageCountReadyCompleter;
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// 书签
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final List<Map<String, dynamic>> _bookmarks = [];
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// Services
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final EpubStreamService _streamService = EpubStreamService();
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@override
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final ReaderDao _readerDao = ReaderDao();
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final EpubParser _epubParser = EpubParser();
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@override
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void initState() {
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super.initState();
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webViewHandler = EpubWebViewHandler(streamService: _streamService);
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// Create a placeholder BookSession; epubInfo will be replaced after parsing.
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bookSession = BookSession(
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fileHash: widget.bookId,
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bookData: widget.bookData ?? {
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'id': widget.bookId,
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'file_path': widget.filePath,
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'cover_path': widget.coverPath,
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'last_read_cfi': '',
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},
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epubInfo: EpubBookInfo(
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title: widget.title,
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author: '',
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authors: [],
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opfRootPath: '',
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epubVersion: '',
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spine: [],
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toc: [],
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),
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readerDao: _readerDao,
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);
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// Load settings first, then book
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ReaderSettings.load().then((settings) {
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readerSettings = settings;
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_pendingScrollXPath = widget.scrollToXPath;
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_pendingScrollText = widget.scrollToText;
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if (mounted) {
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setupVolumeControl();
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_loadBook();
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}
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});
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WidgetsBinding.instance.addObserver(this);
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final route = ModalRoute.of(context);
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if (route != null && route.animation != null) {
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routeAnimation = route.animation!;
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routeAnimation?.addStatusListener(handleRouteAnimationStatus);
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} else {
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shouldShowWebView = true;
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}
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});
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hideBottomNavigationBar();
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}
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@override
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void dispose() {
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WidgetsBinding.instance.removeObserver(this);
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routeAnimation?.removeStatusListener(handleRouteAnimationStatus);
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routeAnimation = null;
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themeUpdateDebouncer?.cancel();
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progressDebouncer?.cancel();
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removeFootnoteOverlay(animate: false);
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restoreSystemUI();
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bookSession.flushProgress(
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currentChapterIndex: currentSpineItemIndex,
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currentPageInChapter: currentPageInChapter,
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totalPagesInChapter: totalPagesInChapter,
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);
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bookSession.dispose();
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_streamService.dispose();
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super.dispose();
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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if (state == AppLifecycleState.paused ||
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state == AppLifecycleState.inactive ||
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state == AppLifecycleState.detached) {
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saveProgress();
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}
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lastLifecycleState = state;
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setupVolumeControl();
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}
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void setupVolumeControl() {
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// VolumeControlService removed — native implementation never existed.
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// TODO: reimplement if native volume-key interception is added.
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}
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void hideBottomNavigationBar() {
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SystemChrome.setEnabledSystemUIMode(
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SystemUiMode.manual,
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overlays: [SystemUiOverlay.top],
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);
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}
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void restoreSystemUI() {
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SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge);
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}
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@override
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void didChangeDependencies() {
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super.didChangeDependencies();
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if (currentTheme == null) {
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currentTheme = Theme.of(context);
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} else if (currentTheme?.colorScheme != Theme.of(context).colorScheme) {
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currentTheme = Theme.of(context);
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updateWebViewThemeWithDebounce();
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}
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}
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void handleRouteAnimationStatus(AnimationStatus status) {
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if (status == AnimationStatus.completed) {
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setState(() {
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shouldShowWebView = true;
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});
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routeAnimation?.removeStatusListener(handleRouteAnimationStatus);
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routeAnimation = null;
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}
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}
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/// Load book data from EPUB file and initialize session.
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Future<void> _loadBook() async {
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try {
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// filePath is the original absolute path from import
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final fullEpubPath = widget.filePath;
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// Parse EPUB metadata using existing EpubParser
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final epubInfo = await _epubParser.parseFromFile(
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fullEpubPath,
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fileName: widget.title,
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);
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if (epubInfo == null) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('EPUB 解析失败')),
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);
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Navigator.of(context).pop();
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}
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return;
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}
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// Open archive in stream service for WebView resource serving
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await _streamService.openBook(fullEpubPath);
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// Update session with parsed data
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bookSession.updateEpubInfo(epubInfo);
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bookSession.load();
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if (mounted) {
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setState(() {
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currentSpineItemIndex = widget.initialSpineIndex ?? bookSession.initialChapterIndex;
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});
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updateProgressDebounced();
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_loadBookmarks();
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}
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} catch (e) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('加载书籍失败: $e')),
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);
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Navigator.of(context).pop();
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}
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}
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}
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// ─── 书签 ──────────────────────────────────────────────────────
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Future<void> _loadBookmarks() async {
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final list = await _readerDao.getBookmarksByBookId(widget.bookId);
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if (mounted) setState(() => _bookmarks..clear()..addAll(list));
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}
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bool get _currentPageHasBookmark {
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final cfi = '$currentSpineItemIndex:${(currentPageInChapter / (totalPagesInChapter > 0 ? totalPagesInChapter : 1)).toStringAsFixed(4)}';
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return _bookmarks.any((bm) => (bm['cfi'] as String? ?? '') == cfi);
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}
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Future<void> _toggleBookmark() async {
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// 检查当前页是否已有书签
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final cfi = '$currentSpineItemIndex:${(currentPageInChapter / (totalPagesInChapter > 0 ? totalPagesInChapter : 1)).toStringAsFixed(4)}';
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final existing = _bookmarks.where((bm) => (bm['cfi'] as String? ?? '') == cfi).firstOrNull;
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if (existing != null) {
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// 删除已有书签
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await _readerDao.deleteBookmark(existing['id'] as int);
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if (mounted) ToastUtil.show(context, '已移除书签');
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} else {
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// 添加书签
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// 尝试从 TOC 找更友好的标题
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String title = '';
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for (final toc in bookSession.toc) {
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if (toc.spineIndex == currentSpineItemIndex) {
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title = toc.label;
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break;
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}
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}
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// 如果 TOC 没有标题（或者标题是原始文件路径），用页内文字内容
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if (title.isEmpty || title.contains('.htm') || title.contains('.xhtml')) {
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title = await _getPageTextPreview();
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if (title.isEmpty) {
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title = '第${currentSpineItemIndex + 1}章';
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}
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}
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await _readerDao.insertBookmark({
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'book_id': widget.bookId,
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'content': title,
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'cfi': cfi,
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'chapter': currentSpineItemIndex.toString(),
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'created_at': DateTime.now().toIso8601String(),
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'updated_at': DateTime.now().toIso8601String(),
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});
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if (mounted) ToastUtil.show(context, '已添加书签');
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}
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await _loadBookmarks();
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}
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/// 获取当前页的文字预览（前 20 个字符）
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Future<String> _getPageTextPreview() async {
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try {
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final result = await rendererController.webViewController?.runJavaScriptReturningResult(
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"(function(){var f=document.getElementById('frame-curr');if(!f||!f.contentDocument)return '';var t=f.contentDocument.body.textContent||'';return t.trim().substring(0,20)})();"
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);
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if (result != null) {
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final s = result.toString();
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return (s.startsWith('"') && s.endsWith('"') && s.length >= 2
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? s.substring(1, s.length - 1) : s).trim();
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}
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} catch (_) {}
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return '';
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}
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void _jumpToBookmark(Map<String, dynamic> bookmark) {
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final cfi = bookmark['cfi'] as String? ?? '';
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if (cfi.isEmpty) return;
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final parts = cfi.split(':');
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if (parts.isEmpty) return;
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final chapterIndex = int.tryParse(parts[0]) ?? 0;
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final scrollRatio = parts.length >= 2 ? (double.tryParse(parts[1]) ?? 0.0) : 0.0;
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if (chapterIndex >= 0 && chapterIndex < bookSession.spine.length) {
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setState(() {
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currentSpineItemIndex = chapterIndex;
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});
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loadCarousel(restoreScrollRatio: scrollRatio);
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}
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}
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Future<void> _deleteBookmark(int id) async {
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await _readerDao.deleteBookmark(id);
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await _loadBookmarks();
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}
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void toggleControls() {
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if (showControls) {
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hideBottomNavigationBar();
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} else {
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restoreSystemUI();
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}
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setState(() {
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showControls = !showControls;
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});
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}
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void openDrawer() {
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scaffoldKey.currentState?.openDrawer();
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}
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void _openSearch() {
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showModalBottomSheet(
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context: context,
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isScrollControlled: true,
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backgroundColor: Colors.transparent,
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builder: (ctx) => SearchSheet(
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bookSession: bookSession,
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streamService: _streamService,
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onNavigate: (spineIndex, keyword, scrollRatio) {
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Navigator.pop(ctx);
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if (spineIndex >= 0 && spineIndex < bookSession.spine.length) {
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setState(() => currentSpineItemIndex = spineIndex);
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loadCarousel(restoreScrollRatio: scrollRatio);
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} else if (mounted) {
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ToastUtil.show(context, '章节位置无效');
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}
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},
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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if (!bookSession.isLoaded) {
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return Scaffold(
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backgroundColor: Theme.of(context).colorScheme.surface,
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body: const SizedBox.shrink(),
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);
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}
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final epubTheme = getEpubTheme();
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final isDark = epubTheme.isDark;
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final colorScheme = epubTheme.colorScheme;
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final themeData = Theme.of(context);
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final overlayStyle = isDark
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? SystemUiOverlayStyle.light.copyWith(
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statusBarColor: Colors.transparent,
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systemNavigationBarColor: colorScheme.surface,
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systemNavigationBarIconBrightness: Brightness.light,
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)
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: SystemUiOverlayStyle.dark.copyWith(
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statusBarColor: Colors.transparent,
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systemNavigationBarColor: colorScheme.surface,
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systemNavigationBarIconBrightness: Brightness.dark,
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);
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final activeItems = resolveActiveItems();
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final activateTocTitle = activeItems.isNotEmpty
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? activeItems.last.label
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: widget.title;
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return PopScope(
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canPop: footnoteOverlayEntry == null,
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onPopInvokedWithResult: (didPop, result) {
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if (didPop) return;
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if (footnoteOverlayEntry != null) {
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removeFootnoteOverlay();
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return;
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}
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// 和 lumina 一样：先保存，再 pop
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saveProgress();
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Navigator.of(context).pop();
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},
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child: AnnotatedRegion<SystemUiOverlayStyle>(
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value: overlayStyle,
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child: Stack(
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children: [
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Scaffold(
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key: scaffoldKey,
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backgroundColor: colorScheme.surfaceContainer,
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drawer: TocDrawer(
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bookTitle: widget.title,
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coverPath: widget.coverPath,
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totalChapters: bookSession.spine.length,
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toc: bookSession.toc,
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activeTocItems: activeItems,
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currentSpineIndex: currentSpineItemIndex >= 0 && currentSpineItemIndex < bookSession.spine.length
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? bookSession.spine[currentSpineItemIndex].index
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: -1,
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onTocItemSelected: navigateToTocItem,
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onCoverTap: navigateToFirstTocItemFirstPage,
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themeData: themeData,
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bookmarks: _bookmarks,
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onBookmarkTap: _jumpToBookmark,
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onBookmarkDelete: _deleteBookmark,
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),
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onDrawerChanged: (isOpened) {
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tocDrawerOpen = isOpened;
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setupVolumeControl();
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},
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body: Container(
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color: epubTheme.surfaceColor,
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child: Stack(
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children: [
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ReaderRenderer(
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controller: rendererController,
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bookSession: bookSession,
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webViewHandler: webViewHandler,
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fileHash: widget.bookId,
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showControls: showControls,
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isLoading: isWebViewLoading || updatingTheme,
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canPerformPageTurn: canPerformPageTurn,
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onPerformPageTurn: handlePageTurn,
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onToggleControls: toggleControls,
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onInitialized: () async {
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// 从详情页跳转时不恢复滚动位置
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final ratio = widget.initialSpineIndex != null
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? null
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||
: bookSession.initialScrollPosition;
|
||
// 如果有跳转目标，创建 Completer 等待分栏布局完成
|
||
if (widget.initialSpineIndex != null && (widget.scrollToXPath != null || widget.scrollToText != null)) {
|
||
_pageCountReadyCompleter = Completer<void>();
|
||
}
|
||
await loadCarousel(restoreScrollRatio: ratio);
|
||
},
|
||
onPageCountReady: (totalPages) async {
|
||
// 通知分栏布局已完成
|
||
if (_pageCountReadyCompleter != null && !_pageCountReadyCompleter!.isCompleted) {
|
||
_pageCountReadyCompleter!.complete();
|
||
}
|
||
setState(() {
|
||
totalPagesInChapter = totalPages;
|
||
if (currentPageInChapter >= totalPagesInChapter) {
|
||
currentPageInChapter = totalPagesInChapter - 1;
|
||
}
|
||
});
|
||
updateProgressDebounced();
|
||
},
|
||
onPageChanged: (pageIndex) {
|
||
setState(() {
|
||
currentPageInChapter = pageIndex;
|
||
});
|
||
updateProgressDebounced();
|
||
saveProgress();
|
||
},
|
||
onScrollAnchors: handleScrollAnchors,
|
||
onImageLongPress: handleImageLongPress,
|
||
onFootnoteTap: handleFootnoteTap,
|
||
onLinkTap: handleLinkTap,
|
||
shouldHandleLinkTap: shouldHandleLinkTap,
|
||
onTextSelection: handleTextSelection,
|
||
shouldShowWebView: shouldShowWebView,
|
||
initializeTheme: epubTheme,
|
||
statusBarLeftContent: activateTocTitle,
|
||
statusBarRightContent: displayProgress,
|
||
pageAnimation: readerSettings.pageAnimation,
|
||
),
|
||
|
||
ControlPanel(
|
||
showControls: showControls,
|
||
title: bookSession.spine.isEmpty
|
||
? widget.title
|
||
: activateTocTitle,
|
||
currentSpineItemIndex: currentSpineItemIndex,
|
||
totalSpineItems: bookSession.spine.length,
|
||
currentPageInChapter: currentPageInChapter,
|
||
totalPagesInChapter: totalPagesInChapter,
|
||
direction: bookSession.direction,
|
||
fontSize: readerSettings.zoom * 18.0,
|
||
zoom: readerSettings.zoom,
|
||
marginTop: readerSettings.marginTop,
|
||
marginBottom: readerSettings.marginBottom,
|
||
marginLeft: readerSettings.marginLeft,
|
||
marginRight: readerSettings.marginRight,
|
||
onBack: () {
|
||
saveProgress();
|
||
Navigator.of(context).pop();
|
||
},
|
||
onOpenDrawer: openDrawer,
|
||
onPreviousPage: () =>
|
||
rendererController.performPreviousPageTurn(),
|
||
onFirstPage: () => goToPage(0),
|
||
onNextPage: () =>
|
||
rendererController.performNextPageTurn(),
|
||
onLastPage: () => goToPage(totalPagesInChapter - 1),
|
||
onPreviousChapter: previousSpineItemFirstPage,
|
||
onNextChapter: nextSpineItem,
|
||
onToggleStyleDrawer: () {
|
||
// Style sheet is opened internally by ControlPanel
|
||
},
|
||
onZoomChanged: (value) {
|
||
setState(() {
|
||
readerSettings = readerSettings.copyWith(zoom: value);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onFontSizeChanged: (value) {
|
||
// 将字号值映射为 zoom（12px→0.7, 18px→1.0, 32px→1.8）
|
||
final zoom = value / 18.0;
|
||
setState(() {
|
||
readerSettings = readerSettings.copyWith(zoom: zoom);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onMarginTopChanged: (value) {
|
||
setState(() {
|
||
readerSettings =
|
||
readerSettings.copyWith(marginTop: value);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onMarginBottomChanged: (value) {
|
||
setState(() {
|
||
readerSettings =
|
||
readerSettings.copyWith(marginBottom: value);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onMarginLeftChanged: (value) {
|
||
setState(() {
|
||
readerSettings =
|
||
readerSettings.copyWith(marginLeft: value);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onMarginRightChanged: (value) {
|
||
setState(() {
|
||
readerSettings =
|
||
readerSettings.copyWith(marginRight: value);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
themeIndex: readerSettings.themeIndex,
|
||
customBgColor: readerSettings.customBgColor,
|
||
customTextColor: readerSettings.customTextColor,
|
||
onThemeIndexChanged: (index) {
|
||
setState(() {
|
||
readerSettings = readerSettings.copyWith(themeIndex: index);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
onCustomColorChanged: (bgColor, textColor) {
|
||
setState(() {
|
||
readerSettings = readerSettings.copyWith(
|
||
customBgColor: bgColor,
|
||
customTextColor: textColor,
|
||
);
|
||
});
|
||
readerSettings.save();
|
||
updateWebViewTheme();
|
||
},
|
||
currentPageHasBookmark: _currentPageHasBookmark,
|
||
onBookmarkToggle: _toggleBookmark,
|
||
onSearchTap: _openSearch,
|
||
),
|
||
],
|
||
),
|
||
),
|
||
),
|
||
|
||
Positioned.fill(
|
||
child: IgnorePointer(
|
||
ignoring: !isImageViewerVisible,
|
||
child: AnimatedOpacity(
|
||
duration: const Duration(milliseconds: 250),
|
||
curve: Curves.easeOut,
|
||
opacity: isImageViewerVisible ? 1.0 : 0.0,
|
||
child: (currentImageData != null && currentImageRect != null)
|
||
? ImageViewer(
|
||
imageData: currentImageData!,
|
||
onClose: closeImageViewer,
|
||
sourceRect: currentImageRect!,
|
||
colorScheme: colorScheme,
|
||
)
|
||
: const SizedBox.shrink(),
|
||
),
|
||
),
|
||
),
|
||
// 文本选中工具条
|
||
if (isSelectionToolbarVisible)
|
||
EpubSelectionToolbar(
|
||
selectionRect: _selectionRect!,
|
||
onCopy: _onCopyButton,
|
||
onHighlight: _onHighlightButton,
|
||
onExcerpt: _onExcerptButton,
|
||
onRemoveHighlight: _existingHighlightId != null && !_existingIsExcerpt ? _onRemoveHighlightButton : null,
|
||
onRemoveExcerpt: _existingHighlightId != null && _existingIsExcerpt ? _onRemoveExcerptButton : null,
|
||
onDismiss: _dismissSelectionToolbar,
|
||
),
|
||
// 选区手柄（起点和终点）
|
||
if (isSelectionToolbarVisible)
|
||
SelectionHandles(
|
||
startPosition: _startHandle,
|
||
endPosition: _endHandle,
|
||
onDragStart: onDragStartHandle,
|
||
onDragEnd: onDragEndHandle,
|
||
),
|
||
],
|
||
),
|
||
),
|
||
);
|
||
}
|
||
}
|