epub_view 2.2.0

Flutter widget for view EPUB documents on on Web, MacOs, Android and iOS. Based on dart-epub package.

example/lib/main.dart

import 'dart:typed_data';
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart'
    show SystemChrome, SystemUiOverlayStyle, rootBundle;
import 'package:epub_view/epub_view.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  @override
  void initState() {
    WidgetsBinding.instance.addObserver(this);
    super.initState();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangePlatformBrightness() {
    _setSystemUIOverlayStyle();
  }

  Brightness get platformBrightness =>
      MediaQueryData.fromWindow(WidgetsBinding.instance.window)
          .platformBrightness;

  void _setSystemUIOverlayStyle() {
    if (platformBrightness == Brightness.light) {
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
        statusBarBrightness: Brightness.light,
        statusBarIconBrightness: Brightness.dark,
        systemNavigationBarColor: Colors.grey[50],
        systemNavigationBarIconBrightness: Brightness.dark,
      ));
    } else {
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
        statusBarBrightness: Brightness.dark,
        statusBarIconBrightness: Brightness.light,
        systemNavigationBarColor: Colors.grey[850],
        systemNavigationBarIconBrightness: Brightness.light,
      ));
    }
  }

  @override
  Widget build(BuildContext context) => MaterialApp(
        title: 'Epub demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
          brightness: Brightness.light,
        ),
        darkTheme: ThemeData(
          primarySwatch: Colors.blue,
          brightness: Brightness.dark,
        ),
        debugShowCheckedModeBanner: false,
        home: MyHomePage(),
      );
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  EpubController _epubReaderController;

  @override
  void initState() {
    final loadedBook =
        _loadFromAssets('assets/New-Findings-on-Shirdi-Sai-Baba.epub');
    _epubReaderController = EpubController(
      document: EpubReader.readBook(loadedBook),
      //  document: EpubReader,
      // epubCfi:
      //     'epubcfi(/6/26[id4]!/4/2/2[id4]/22)', // book.epub Chapter 3 paragraph 10
      // epubCfi:
      //     'epubcfi(/6/6[chapter-2]!/4/2/1612)', // book_2.epub Chapter 16 paragraph 3
    );
    super.initState();
  }

  @override
  void dispose() {
    _epubReaderController.dispose();
    super.dispose();
  }

  Future<Uint8List> _loadFromAssets(String assetName) async {
    final bytes = await rootBundle.load(assetName);
    return bytes.buffer.asUint8List();
  }

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: EpubActualChapter(
            controller: _epubReaderController,
            builder: (chapterValue) => Text(
              (chapterValue?.chapter?.Title?.trim() ?? '').replaceAll('\n', ''),
              textAlign: TextAlign.start,
            ),
          ),
          actions: <Widget>[
            IconButton(
              icon: Icon(Icons.save_alt),
              color: Colors.white,
              onPressed: () => _showCurrentEpubCfi(context),
            ),
          ],
        ),
        drawer: Drawer(
          child: EpubReaderTableOfContents(controller: _epubReaderController),
        ),
        body: EpubView(
          controller: _epubReaderController,
          onDocumentLoaded: (document) {
            print('isLoaded: $document');
          },
          dividerBuilder: (_) => Divider(),
        ),
      );

  void _showCurrentEpubCfi(context) {
    final cfi = _epubReaderController.generateEpubCfi();

    if (cfi != null) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(cfi),
          action: SnackBarAction(
            label: 'GO',
            onPressed: () {
              _epubReaderController.gotoEpubCfi(cfi);
            },
          ),
        ),
      );
    }
  }
}