653 lines
18 KiB
Dart
653 lines
18 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 'package:webview_flutter/webview_flutter.dart';
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import 'config/app_config.dart';
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const _shellBackground = Color(0xFFF8FBFF);
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const _shellAccent = Color(0xFF0089FF);
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const _shellSubText = Color(0xFF8E9AB0);
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const _shellBrandingChannel =
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MethodChannel('io.openim.flutter.im_webview_app/shell_branding');
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Future<void> main() async {
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WidgetsFlutterBinding.ensureInitialized();
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SystemChrome.setSystemUIOverlayStyle(
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const SystemUiOverlayStyle(
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statusBarColor: Colors.transparent,
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statusBarIconBrightness: Brightness.dark,
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systemNavigationBarColor: _shellBackground,
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systemNavigationBarIconBrightness: Brightness.dark,
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),
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);
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runApp(const ImWebViewApp());
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}
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class ShellBranding {
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const ShellBranding({
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required this.appName,
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required this.appLogo,
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});
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static const fallback = ShellBranding(
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appName: AppConfig.appName,
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appLogo: AppConfig.appLogo,
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);
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final String appName;
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final String appLogo;
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static Future<ShellBranding> load() async {
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try {
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final data = await _shellBrandingChannel
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.invokeMapMethod<String, String>('getShellBranding');
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final appName = _trim(data?['appName']);
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final appLogo = _trim(data?['appLogo']);
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return ShellBranding(
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appName: appName.isNotEmpty ? appName : fallback.appName,
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appLogo: appLogo.isNotEmpty ? appLogo : fallback.appLogo,
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);
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} catch (_) {
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return fallback;
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}
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}
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static String _trim(String? value) => value?.trim() ?? '';
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}
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class ImWebViewApp extends StatelessWidget {
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const ImWebViewApp({
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super.key,
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this.shellBranding = ShellBranding.fallback,
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});
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final ShellBranding shellBranding;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: shellBranding.appName,
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debugShowCheckedModeBanner: false,
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theme: ThemeData(
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colorScheme: ColorScheme.fromSeed(seedColor: const Color(0xFF1F6FEB)),
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scaffoldBackgroundColor: _shellBackground,
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useMaterial3: true,
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),
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home: H5ShellPage(initialShellBranding: shellBranding),
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);
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}
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}
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class H5ShellPage extends StatefulWidget {
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const H5ShellPage({super.key, required this.initialShellBranding});
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final ShellBranding initialShellBranding;
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@override
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State<H5ShellPage> createState() => _H5ShellPageState();
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}
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class _H5ShellPageState extends State<H5ShellPage> {
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late final WebViewController _controller;
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int _progress = 0;
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String? _loadError;
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bool _showShellCover = true;
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bool _shellBrandingLoaded = false;
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Timer? _shellCoverFallbackTimer;
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late ShellBranding _shellBranding;
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@override
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void initState() {
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super.initState();
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_shellBranding = widget.initialShellBranding;
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_controller = _buildController();
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unawaited(_loadHome());
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}
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WebViewController _buildController() {
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return WebViewController()
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..setJavaScriptMode(JavaScriptMode.unrestricted)
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..addJavaScriptChannel(
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'OpenIMShell',
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onMessageReceived: _handleShellMessage,
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)
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..setBackgroundColor(_shellBackground)
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..setNavigationDelegate(
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NavigationDelegate(
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onProgress: (progress) {
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if (mounted) {
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setState(() => _progress = progress);
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}
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},
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onPageStarted: (_) {
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_shellCoverFallbackTimer?.cancel();
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if (mounted) {
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setState(() {
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_loadError = null;
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_progress = 0;
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_showShellCover = true;
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});
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}
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},
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onPageFinished: (_) {
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unawaited(_handlePageFinished());
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},
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onWebResourceError: (error) {
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if (error.isForMainFrame ?? true) {
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_shellCoverFallbackTimer?.cancel();
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if (mounted) {
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setState(() {
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_loadError = error.description;
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_showShellCover = false;
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});
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}
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}
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},
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onNavigationRequest: _handleNavigationRequest,
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),
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);
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}
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@override
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void dispose() {
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_shellCoverFallbackTimer?.cancel();
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super.dispose();
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}
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Future<void> _runJavaScriptSafely(String source) async {
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try {
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await _controller.runJavaScript(source);
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} catch (_) {
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// WebView can reject JavaScript while a page is still navigating.
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}
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}
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String _freshHomeUrl() {
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return AppConfig.homeUrl();
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}
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Future<void> _handlePageFinished() async {
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await _loadShellBrandingIfNeeded();
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await _syncShellBranding();
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if (mounted) {
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setState(() {
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_progress = 100;
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});
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}
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_scheduleShellCoverFallback();
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}
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void _handleShellMessage(JavaScriptMessage message) {
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try {
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final decoded = jsonDecode(message.message);
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if (decoded is Map && decoded['type'] == 'first-screen-ready') {
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_hideShellCover();
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}
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} catch (_) {
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if (message.message == 'first-screen-ready') {
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_hideShellCover();
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}
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}
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}
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void _scheduleShellCoverFallback() {
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_shellCoverFallbackTimer?.cancel();
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_shellCoverFallbackTimer = Timer(
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const Duration(seconds: 4),
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_hideShellCover,
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);
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}
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void _hideShellCover() {
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_shellCoverFallbackTimer?.cancel();
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if (!mounted || !_showShellCover) {
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return;
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}
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setState(() {
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_progress = 100;
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_showShellCover = false;
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});
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}
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Future<void> _loadShellBrandingIfNeeded() async {
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if (_shellBrandingLoaded) {
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return;
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}
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final shellBranding = await ShellBranding.load();
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_shellBrandingLoaded = true;
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if (!mounted) {
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_shellBranding = shellBranding;
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return;
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}
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setState(() {
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_shellBranding = shellBranding;
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});
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}
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Future<void> _syncShellBranding() {
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final payload = jsonEncode({
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'name': _shellBranding.appName,
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'logo': _shellBranding.appLogo,
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});
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final script = '''
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(() => {
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try {
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const brand = $payload;
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window.sessionStorage.setItem('OPENIM_FLUTTER_SHELL_BRAND', JSON.stringify(brand));
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window.dispatchEvent(new CustomEvent('openim-shell-branding-updated', { detail: brand }));
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} catch (_) {}
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})();
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''';
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return _runJavaScriptSafely(script);
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}
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Future<void> _loadHome() async {
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await _loadUrl(_freshHomeUrl());
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}
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Future<void> _loadUrl(String url) async {
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final targetUrl = AppConfig.canonicalizeMainFrameUrl(url);
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if (mounted) {
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_shellCoverFallbackTimer?.cancel();
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setState(() {
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_loadError = null;
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_progress = 0;
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_showShellCover = true;
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});
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}
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await _controller.loadRequest(Uri.parse(targetUrl));
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}
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Future<NavigationDecision> _handleNavigationRequest(
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NavigationRequest request,
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) async {
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final uri = Uri.tryParse(request.url);
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if (uri == null) {
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return NavigationDecision.prevent;
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}
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const webSchemes = {'http', 'https', 'about', 'data'};
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if (webSchemes.contains(uri.scheme)) {
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if (request.isMainFrame &&
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AppConfig.shouldRewriteMainFrameUrl(request.url)) {
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unawaited(_loadUrl(AppConfig.canonicalizeMainFrameUrl(request.url)));
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return NavigationDecision.prevent;
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}
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return NavigationDecision.navigate;
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}
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try {
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await launchUrl(uri, mode: LaunchMode.externalApplication);
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} catch (_) {
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// Ignore unsupported custom schemes so the WebView does not navigate to
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// an error page.
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}
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return NavigationDecision.prevent;
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}
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Future<void> _handleBackNavigation() async {
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if (await _controller.canGoBack()) {
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await _controller.goBack();
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} else {
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await SystemNavigator.pop();
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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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return PopScope(
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canPop: false,
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onPopInvokedWithResult: (didPop, _) {
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if (!didPop) {
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unawaited(_handleBackNavigation());
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}
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},
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child: Scaffold(
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backgroundColor: _shellBackground,
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body: SafeArea(
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bottom: false,
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child: Stack(
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children: [
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Positioned.fill(child: _ShellFallback(progress: _progress)),
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WebViewWidget(controller: _controller),
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if (_showShellCover)
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Positioned.fill(
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child: IgnorePointer(
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child: _ShellFallback(progress: _progress),
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),
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),
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if (!_showShellCover && _progress < 100)
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LinearProgressIndicator(
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value: _progress == 0 ? null : _progress / 100,
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minHeight: 2,
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),
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if (_loadError != null)
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_ErrorPanel(
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message: _loadError!,
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onRetry: () => unawaited(_loadHome()),
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),
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],
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),
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),
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),
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);
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}
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}
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class _ErrorPanel extends StatelessWidget {
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const _ErrorPanel({required this.message, required this.onRetry});
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final String message;
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final VoidCallback onRetry;
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@override
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Widget build(BuildContext context) {
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return ColoredBox(
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color: Colors.white,
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child: Center(
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child: Padding(
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padding: const EdgeInsets.all(24),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.wifi_off_rounded, size: 44),
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const SizedBox(height: 16),
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const Text(
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'页面加载失败',
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style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
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),
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const SizedBox(height: 8),
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Text(
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message,
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textAlign: TextAlign.center,
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style: Theme.of(context).textTheme.bodyMedium,
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),
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const SizedBox(height: 20),
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FilledButton(
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onPressed: onRetry,
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child: const Text('重新加载'),
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),
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],
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),
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),
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),
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);
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}
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}
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class _ShellFallback extends StatelessWidget {
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const _ShellFallback({required this.progress});
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final int progress;
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@override
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Widget build(BuildContext context) {
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final progressValue =
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progress <= 0 ? 0.42 : (0.18 + progress.clamp(0, 100) * 0.0074);
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return CustomPaint(
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painter: const _H5LoadingBackgroundPainter(),
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child: LayoutBuilder(
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builder: (context, constraints) {
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final markSize = (constraints.maxWidth * 0.37).clamp(118.0, 152.0);
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final contentTop = constraints.maxHeight * 0.29;
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final progressWidth =
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(constraints.maxWidth * 0.28).clamp(104.0, 132.0);
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return Align(
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alignment: Alignment.topCenter,
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child: Padding(
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padding: EdgeInsets.only(top: contentTop),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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_ShellMark(size: markSize),
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SizedBox(height: markSize * 0.16),
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const Text(
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'心有回响',
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style: TextStyle(
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color: _shellAccent,
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fontSize: 24,
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height: 1.2,
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fontWeight: FontWeight.w700,
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letterSpacing: 0,
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),
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),
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const SizedBox(height: 8),
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const Text(
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'正在为你唤醒会话',
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style: TextStyle(
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color: _shellSubText,
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fontSize: 12,
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height: 1.2,
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letterSpacing: 0,
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),
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),
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const SizedBox(height: 30),
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_H5LoadingProgress(
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width: progressWidth,
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value: progressValue.clamp(0.18, 0.96),
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),
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],
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),
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),
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);
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},
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),
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);
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}
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}
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class _ShellMark extends StatelessWidget {
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const _ShellMark({required this.size});
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final double size;
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@override
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Widget build(BuildContext context) {
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return CustomPaint(
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size: Size(size, size * 0.92),
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painter: const _BubbleCheckPainter(),
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);
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}
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}
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class _H5LoadingProgress extends StatelessWidget {
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const _H5LoadingProgress({required this.width, required this.value});
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final double width;
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final double value;
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@override
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Widget build(BuildContext context) {
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return ClipRRect(
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borderRadius: BorderRadius.circular(99),
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child: SizedBox(
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width: width,
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height: 4,
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child: Stack(
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fit: StackFit.expand,
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children: [
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const ColoredBox(color: Color(0xFFDCEEFF)),
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TweenAnimationBuilder<double>(
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tween: Tween<double>(end: value),
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duration: const Duration(milliseconds: 260),
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curve: Curves.easeOutCubic,
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builder: (context, animatedValue, _) {
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return FractionallySizedBox(
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alignment: Alignment.centerLeft,
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widthFactor: animatedValue,
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child: const ColoredBox(color: _shellAccent),
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);
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},
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),
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],
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),
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),
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);
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}
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}
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class _H5LoadingBackgroundPainter extends CustomPainter {
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const _H5LoadingBackgroundPainter();
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static const _sourceSize = Size(1080, 2400);
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@override
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void paint(Canvas canvas, Size size) {
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final scale =
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(size.width / _sourceSize.width) > (size.height / _sourceSize.height)
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? size.width / _sourceSize.width
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: size.height / _sourceSize.height;
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final dx = (size.width - _sourceSize.width * scale) / 2;
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final dy = (size.height - _sourceSize.height * scale) / 2;
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canvas.save();
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canvas.translate(dx, dy);
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canvas.scale(scale);
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final pageRect = Offset.zero & _sourceSize;
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final pagePaint = Paint()
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..shader = const LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [
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Color(0xFFE7F4FF),
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_shellBackground,
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Colors.white,
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],
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stops: [0, 0.46, 1],
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).createShader(pageRect);
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canvas.drawRect(pageRect, pagePaint);
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final topWave = Path()
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..moveTo(0, 0)
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..lineTo(1080, 0)
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..lineTo(1080, 318)
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..cubicTo(920, 246, 780, 246, 660, 318)
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..cubicTo(512, 407, 387, 410, 284, 348)
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..cubicTo(174, 282, 79, 281, 0, 344)
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..close();
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canvas.drawPath(
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topWave,
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Paint()..color = const Color(0xFFDDF1FF).withValues(alpha: 0.68),
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);
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final bottomWave = Path()
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..moveTo(1080, 855)
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..lineTo(1080, 2400)
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..lineTo(0, 2400)
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..lineTo(0, 1942)
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..cubicTo(124, 1854, 265, 1834, 423, 1883)
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..cubicTo(598, 1937, 744, 1905, 862, 1788)
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..cubicTo(934, 1717, 1007, 1678, 1080, 1672)
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..close();
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canvas.drawPath(
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bottomWave,
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Paint()..color = const Color(0xFFF4FAFF).withValues(alpha: 0.86),
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);
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canvas.restore();
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}
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@override
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bool shouldRepaint(covariant _H5LoadingBackgroundPainter oldDelegate) {
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return false;
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}
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}
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class _BubbleCheckPainter extends CustomPainter {
|
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const _BubbleCheckPainter();
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static const _viewBox = Size(400, 363.33);
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@override
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void paint(Canvas canvas, Size size) {
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final scale =
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(size.width / _viewBox.width) < (size.height / _viewBox.height)
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? size.width / _viewBox.width
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: size.height / _viewBox.height;
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final dx = (size.width - _viewBox.width * scale) / 2;
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final dy = (size.height - _viewBox.height * scale) / 2;
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canvas.save();
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canvas.translate(dx, dy);
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canvas.scale(scale);
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final bubble = Path()
|
|
..moveTo(200, 0)
|
|
..cubicTo(89.54, 0, 0, 81.33, 0, 181.67)
|
|
..cubicTo(0, 282, 89.54, 363.33, 200, 363.33)
|
|
..cubicTo(237.89, 363.33, 273.32, 353.77, 303.52, 337.16)
|
|
..lineTo(386.67, 363.33)
|
|
..lineTo(355.95, 290.69)
|
|
..cubicTo(383.61, 260.37, 400, 222.36, 400, 181.67)
|
|
..cubicTo(400, 81.33, 310.46, 0, 200, 0)
|
|
..close();
|
|
|
|
final shadowPaint = Paint()
|
|
..color = const Color(0xFF026CD5).withValues(alpha: 0.18)
|
|
..maskFilter = const MaskFilter.blur(BlurStyle.normal, 34);
|
|
canvas.save();
|
|
canvas.translate(0, 30);
|
|
canvas.drawPath(bubble, shadowPaint);
|
|
canvas.restore();
|
|
|
|
final bubblePaint = Paint()
|
|
..shader = const LinearGradient(
|
|
begin: Alignment.topLeft,
|
|
end: Alignment.bottomRight,
|
|
colors: [
|
|
Color(0xFFA8DDFF),
|
|
_shellAccent,
|
|
Color(0xFF0066E8),
|
|
],
|
|
stops: [0, 0.48, 1],
|
|
).createShader(Offset.zero & _viewBox);
|
|
canvas.drawPath(bubble, bubblePaint);
|
|
|
|
final highlightPaint = Paint()
|
|
..shader = LinearGradient(
|
|
begin: Alignment.topLeft,
|
|
end: Alignment.bottomRight,
|
|
colors: [
|
|
Colors.white.withValues(alpha: 0.38),
|
|
Colors.white.withValues(alpha: 0),
|
|
],
|
|
).createShader(Offset.zero & _viewBox);
|
|
canvas.drawPath(bubble, highlightPaint);
|
|
|
|
final check = Path()
|
|
..moveTo(101, 163.5)
|
|
..lineTo(170.5, 233)
|
|
..lineTo(306, 97.5);
|
|
canvas.drawPath(
|
|
check,
|
|
Paint()
|
|
..color = Colors.white
|
|
..style = PaintingStyle.stroke
|
|
..strokeWidth = 58
|
|
..strokeCap = StrokeCap.round
|
|
..strokeJoin = StrokeJoin.round,
|
|
);
|
|
|
|
canvas.restore();
|
|
}
|
|
|
|
@override
|
|
bool shouldRepaint(covariant _BubbleCheckPainter oldDelegate) {
|
|
return false;
|
|
}
|
|
}
|