1045 lines
28 KiB
Dart
1045 lines
28 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:permission_handler/permission_handler.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 'package:webview_flutter_android/webview_flutter_android.dart';
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import 'package:webview_flutter_wkwebview/webview_flutter_wkwebview.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 _resumeCoverDuration = Duration(milliseconds: 700);
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const _noCacheHeaders = {
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'Cache-Control': 'no-cache, no-store, max-age=0, must-revalidate',
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'Pragma': 'no-cache',
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'Expires': '0',
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};
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const _shellBrandingChannel =
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MethodChannel('io.openim.flutter.im_webview_app/shell_branding');
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const _shellWebViewCacheChannel =
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MethodChannel('io.openim.flutter.im_webview_app/webview_cache');
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const _runtimeCachePurgeFallbackDuration = Duration(seconds: 2);
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const _purgeWebRuntimeCacheScript = r'''
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(() => {
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if (window.__openimShellRuntimeCachePurgeStarted) {
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return;
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}
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window.__openimShellRuntimeCachePurgeStarted = true;
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const targetUrl = () => {
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try {
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const target = new URL(window.location.href);
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target.searchParams.set('shell_cache_bust', Date.now().toString());
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target.searchParams.set('shell_runtime_cache_purged', '1');
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return target.toString();
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} catch (_) {
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return window.location.href;
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}
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};
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const notifyFlutter = (payload) => {
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const channel = window.OpenIMFlutterShell;
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if (channel && typeof channel.postMessage === 'function') {
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channel.postMessage(JSON.stringify(payload));
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return true;
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}
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return false;
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};
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const purgeRuntimeCache = async () => {
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const result = {
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cacheStorageKeys: 0,
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serviceWorkerRegistrations: 0,
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};
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try {
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if ('caches' in window && caches.keys) {
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const keys = await caches.keys();
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result.cacheStorageKeys = keys.length;
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await Promise.all(keys.map((key) => caches.delete(key)));
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}
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} catch (_) {}
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try {
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if (
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navigator.serviceWorker &&
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typeof navigator.serviceWorker.getRegistrations === 'function'
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) {
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const registrations = await navigator.serviceWorker.getRegistrations();
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result.serviceWorkerRegistrations = registrations.length;
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await Promise.all(
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registrations.map((registration) => registration.unregister())
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);
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}
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} catch (_) {}
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return result;
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};
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purgeRuntimeCache()
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.then((result) => {
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const payload = {
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type: 'runtimeCachePurged',
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url: targetUrl(),
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result,
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};
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if (!notifyFlutter(payload)) {
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window.location.replace(payload.url);
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}
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})
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.catch(() => {
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const payload = {
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type: 'runtimeCachePurged',
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url: targetUrl(),
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};
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if (!notifyFlutter(payload)) {
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window.location.replace(payload.url);
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}
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});
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})();
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''';
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const _inspectH5SnapshotScript = r'''
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(() => {
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const toAbsoluteUrl = (value) => {
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try {
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return new URL(value, window.location.href).href;
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} catch (_) {
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return value || '';
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}
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};
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const shrinkAssetUrl = (value) => {
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const absolute = toAbsoluteUrl(value);
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const match = absolute.match(/\/assets\/[^?#]+/);
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return match ? match[0] : absolute;
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};
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const scripts = Array.from(document.scripts)
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.map((script) => script.src)
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.filter(Boolean)
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.map(shrinkAssetUrl);
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const links = Array.from(document.querySelectorAll('link[href]'))
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.map((link) => link.href)
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.filter(Boolean)
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.map(shrinkAssetUrl);
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const bodyText = (document.body?.innerText || '')
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.replace(/\s+/g, ' ')
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.slice(0, 300);
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return JSON.stringify({
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type: 'h5Snapshot',
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href: window.location.href,
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title: document.title,
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scripts,
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links,
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bodyText,
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userAgent: navigator.userAgent,
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});
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})();
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''';
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const _shellMediaPermissionBridgeScript = r'''
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(() => {
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if (window.__openimShellMediaBridgeInstalled) {
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return;
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}
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const channel = window.OpenIMFlutterShell;
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const mediaDevices = navigator.mediaDevices;
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if (!channel || typeof channel.postMessage !== 'function') {
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return;
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}
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if (!mediaDevices || typeof mediaDevices.getUserMedia !== 'function') {
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return;
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}
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const originalGetUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
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const resultEventName = 'openim-shell-media-permission-result';
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const createRequestId = () => {
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if (window.crypto && typeof window.crypto.randomUUID === 'function') {
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return window.crypto.randomUUID();
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}
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return `${Date.now()}-${Math.random().toString(36).slice(2)}`;
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};
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const createPermissionError = () => {
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try {
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return new DOMException('Permission denied', 'NotAllowedError');
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} catch (_) {
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const error = new Error('Permission denied');
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error.name = 'NotAllowedError';
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return error;
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}
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};
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const requestNativePermissions = (constraints) =>
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new Promise((resolve) => {
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const requestId = createRequestId();
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let timer;
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const cleanup = () => {
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if (timer) {
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window.clearTimeout(timer);
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}
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window.removeEventListener(resultEventName, listener);
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};
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const listener = (event) => {
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const detail = event.detail;
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if (!detail || detail.requestId !== requestId) {
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return;
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}
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cleanup();
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resolve(detail);
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};
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timer = window.setTimeout(() => {
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cleanup();
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resolve(undefined);
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}, 30000);
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window.addEventListener(resultEventName, listener);
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channel.postMessage(
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JSON.stringify({
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type: 'requestMediaPermissions',
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requestId,
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audio: Boolean(constraints && constraints.audio),
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video: Boolean(constraints && constraints.video),
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}),
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);
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});
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const wrappedGetUserMedia = async (constraints) => {
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const result = await requestNativePermissions(constraints || {});
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if (result && result.granted) {
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return originalGetUserMedia(constraints);
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}
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throw createPermissionError();
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};
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try {
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Object.defineProperty(mediaDevices, 'getUserMedia', {
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configurable: true,
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writable: true,
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value: wrappedGetUserMedia,
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});
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} catch (_) {
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mediaDevices.getUserMedia = wrappedGetUserMedia;
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}
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window.__openimShellMediaBridgeInstalled = true;
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window.dispatchEvent(new CustomEvent('openim-shell-media-bridge-ready'));
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})();
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''';
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const _stopWebMediaScript = r'''
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(() => {
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try {
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window.__stopOpenIMVoicePlayback?.();
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} catch (_) {}
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document.querySelectorAll('audio, video').forEach((media) => {
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try {
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media.pause();
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media.currentTime = 0;
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} catch (_) {}
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});
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})();
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''';
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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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final shellBranding = await ShellBranding.load();
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runApp(ImWebViewApp(shellBranding: shellBranding));
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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(shellBranding: 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.shellBranding});
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final ShellBranding shellBranding;
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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> with WidgetsBindingObserver {
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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 _runtimeCachePurgeStarted = false;
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bool _runtimeCachePurgeReloaded = false;
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Timer? _shellCoverTimer;
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Timer? _runtimeCachePurgeFallbackTimer;
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance.addObserver(this);
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_controller = _buildController();
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unawaited(_loadHome());
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}
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@override
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void dispose() {
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_shellCoverTimer?.cancel();
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_runtimeCachePurgeFallbackTimer?.cancel();
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WidgetsBinding.instance.removeObserver(this);
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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.inactive ||
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state == AppLifecycleState.hidden ||
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state == AppLifecycleState.paused ||
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state == AppLifecycleState.detached) {
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unawaited(_stopWebMedia());
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} else if (state == AppLifecycleState.resumed) {
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_showTransientShellCover();
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}
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}
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WebViewController _buildController() {
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PlatformWebViewControllerCreationParams params =
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const PlatformWebViewControllerCreationParams();
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if (WebViewPlatform.instance is WebKitWebViewPlatform) {
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params = WebKitWebViewControllerCreationParams(
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allowsInlineMediaPlayback: true,
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mediaTypesRequiringUserAction: const <PlaybackMediaTypes>{},
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);
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} else if (WebViewPlatform.instance is AndroidWebViewPlatform) {
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params = AndroidWebViewControllerCreationParams
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.fromPlatformWebViewControllerCreationParams(params);
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}
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final controller = WebViewController.fromPlatformCreationParams(
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params,
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onPermissionRequest: (request) {
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unawaited(_handleWebViewPermissionRequest(request));
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},
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)
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..setJavaScriptMode(JavaScriptMode.unrestricted)
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..addJavaScriptChannel(
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'OpenIMFlutterShell',
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onMessageReceived: _handleShellBridgeMessage,
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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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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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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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onUrlChange: (_) {
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unawaited(_stopWebMedia());
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},
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onNavigationRequest: _handleNavigationRequest,
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),
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);
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final platformController = controller.platform;
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if (platformController is AndroidWebViewController) {
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assert(() {
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AndroidWebViewController.enableDebugging(true);
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return true;
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}());
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unawaited(platformController.setMediaPlaybackRequiresUserGesture(false));
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unawaited(platformController.setGeolocationEnabled(true));
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unawaited(
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platformController.setGeolocationPermissionsPromptCallbacks(
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onShowPrompt: (_) async {
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final allowed =
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await _requestPermission(Permission.locationWhenInUse);
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return GeolocationPermissionsResponse(
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allow: allowed,
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retain: allowed,
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);
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},
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),
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);
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}
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return controller;
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}
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void _handleShellBridgeMessage(JavaScriptMessage message) {
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Map<String, dynamic>? payload;
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String? type;
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try {
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final decoded = jsonDecode(message.message);
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if (decoded is Map) {
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payload = Map<String, dynamic>.from(decoded);
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type = payload['type'] as String?;
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}
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} catch (_) {
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type = message.message;
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}
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if (type == 'openAppSettings') {
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unawaited(openAppSettings());
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}
|
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if (type == 'runtimeCachePurged' && payload != null) {
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debugPrint('[H5Shell] runtime cache purged: ${jsonEncode(payload)}');
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unawaited(_reloadAfterRuntimeCachePurge(payload['url'] as String?));
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}
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if (type == 'requestMediaPermissions' && payload != null) {
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unawaited(_handleMediaPermissionBridgeRequest(payload));
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}
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}
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Future<void> _handleMediaPermissionBridgeRequest(
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Map<String, dynamic> payload,
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) async {
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final requestId = payload['requestId'] as String?;
|
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if (requestId == null || requestId.isEmpty) {
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return;
|
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}
|
|
|
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final permissions = <Permission>{};
|
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if (payload['audio'] == true) {
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permissions.add(Permission.microphone);
|
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}
|
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if (payload['video'] == true) {
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permissions.add(Permission.camera);
|
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}
|
|
|
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final statusesByPermission = await _requestPermissions(permissions);
|
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final statuses = statusesByPermission.values;
|
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final granted = statuses.every(
|
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_isPermissionAllowed,
|
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);
|
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final permanentlyDenied =
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statuses.any((status) => status.isPermanentlyDenied);
|
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final restricted = statuses.any((status) => status.isRestricted);
|
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|
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final detail = jsonEncode({
|
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'requestId': requestId,
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'granted': granted,
|
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'permanentlyDenied': permanentlyDenied,
|
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'restricted': restricted,
|
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});
|
|
final script = '''
|
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(() => {
|
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window.dispatchEvent(new CustomEvent('openim-shell-media-permission-result', { detail: $detail }));
|
|
})();
|
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''';
|
|
await _runJavaScriptSafely(script);
|
|
}
|
|
|
|
void _showTransientShellCover() {
|
|
_shellCoverTimer?.cancel();
|
|
if (mounted) {
|
|
setState(() => _showShellCover = true);
|
|
}
|
|
_shellCoverTimer = Timer(_resumeCoverDuration, () {
|
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if (mounted) {
|
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setState(() => _showShellCover = _progress < 100);
|
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}
|
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});
|
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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);
|
|
} catch (_) {
|
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// WebView can reject JavaScript while a page is still navigating.
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}
|
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}
|
|
|
|
String _freshHomeUrl() {
|
|
return AppConfig.homeUrl(
|
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appName: widget.shellBranding.appName,
|
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appLogo: widget.shellBranding.appLogo,
|
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);
|
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}
|
|
|
|
String _freshShellUrl(String? url) {
|
|
final value = url?.trim();
|
|
if (value == null || value.isEmpty) {
|
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return _freshHomeUrl();
|
|
}
|
|
|
|
try {
|
|
return AppConfig.withFreshShellParams(
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value,
|
|
appName: widget.shellBranding.appName,
|
|
appLogo: widget.shellBranding.appLogo,
|
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);
|
|
} catch (_) {
|
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return _freshHomeUrl();
|
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}
|
|
}
|
|
|
|
Future<void> _handlePageFinished() async {
|
|
final waitingForRuntimeCacheReload =
|
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await _purgeWebRuntimeCacheAndReloadIfNeeded();
|
|
if (waitingForRuntimeCacheReload) {
|
|
return;
|
|
}
|
|
|
|
unawaited(_syncShellBranding());
|
|
unawaited(_injectShellMediaPermissionBridge());
|
|
unawaited(_logLoadedH5Snapshot());
|
|
if (mounted) {
|
|
setState(() {
|
|
_progress = 100;
|
|
_showShellCover = false;
|
|
});
|
|
}
|
|
}
|
|
|
|
Future<bool> _purgeWebRuntimeCacheAndReloadIfNeeded() async {
|
|
if (_runtimeCachePurgeStarted) {
|
|
return false;
|
|
}
|
|
|
|
_runtimeCachePurgeStarted = true;
|
|
try {
|
|
await _controller.runJavaScript(_purgeWebRuntimeCacheScript);
|
|
} catch (_) {
|
|
_runtimeCachePurgeStarted = false;
|
|
return false;
|
|
}
|
|
|
|
_runtimeCachePurgeFallbackTimer?.cancel();
|
|
_runtimeCachePurgeFallbackTimer = Timer(
|
|
_runtimeCachePurgeFallbackDuration,
|
|
() {
|
|
if (!_runtimeCachePurgeReloaded) {
|
|
unawaited(_reloadAfterRuntimeCachePurge(null));
|
|
}
|
|
},
|
|
);
|
|
return true;
|
|
}
|
|
|
|
Future<void> _reloadAfterRuntimeCachePurge(String? url) async {
|
|
if (_runtimeCachePurgeReloaded) {
|
|
return;
|
|
}
|
|
|
|
_runtimeCachePurgeReloaded = true;
|
|
_runtimeCachePurgeFallbackTimer?.cancel();
|
|
if (mounted) {
|
|
setState(() {
|
|
_loadError = null;
|
|
_progress = 0;
|
|
_showShellCover = true;
|
|
});
|
|
}
|
|
|
|
String? currentUrl;
|
|
if (url == null || url.trim().isEmpty) {
|
|
try {
|
|
currentUrl = await _controller.currentUrl();
|
|
} catch (_) {}
|
|
}
|
|
|
|
await _loadUrl(_freshShellUrl(url ?? currentUrl));
|
|
}
|
|
|
|
Future<void> _prepareWebViewForFreshLoad() async {
|
|
await _configureAndroidNoCache();
|
|
try {
|
|
await _controller.clearCache();
|
|
} catch (_) {
|
|
// Some WebView implementations can reject cache operations during setup.
|
|
}
|
|
}
|
|
|
|
Future<void> _configureAndroidNoCache() async {
|
|
final platformController = _controller.platform;
|
|
if (platformController is! AndroidWebViewController) {
|
|
return;
|
|
}
|
|
|
|
try {
|
|
await _shellWebViewCacheChannel.invokeMethod<void>(
|
|
'configureNoCache',
|
|
{'webViewId': platformController.webViewIdentifier},
|
|
);
|
|
} catch (_) {
|
|
// Older shells may not expose the native cache channel yet.
|
|
}
|
|
}
|
|
|
|
Future<void> _syncShellBranding() {
|
|
final payload = jsonEncode({
|
|
'name': widget.shellBranding.appName,
|
|
'logo': widget.shellBranding.appLogo,
|
|
});
|
|
final script = '''
|
|
(() => {
|
|
try {
|
|
const brand = $payload;
|
|
window.sessionStorage.setItem('OPENIM_FLUTTER_SHELL_BRAND', JSON.stringify(brand));
|
|
window.dispatchEvent(new CustomEvent('openim-shell-branding-updated', { detail: brand }));
|
|
} catch (_) {}
|
|
})();
|
|
''';
|
|
return _runJavaScriptSafely(script);
|
|
}
|
|
|
|
Future<void> _injectShellMediaPermissionBridge() {
|
|
return _runJavaScriptSafely(_shellMediaPermissionBridgeScript);
|
|
}
|
|
|
|
Future<void> _stopWebMedia() {
|
|
return _runJavaScriptSafely(_stopWebMediaScript);
|
|
}
|
|
|
|
Future<void> _logLoadedH5Snapshot() async {
|
|
try {
|
|
final result = await _controller.runJavaScriptReturningResult(
|
|
_inspectH5SnapshotScript,
|
|
);
|
|
debugPrint(
|
|
'[H5Shell] loaded H5 snapshot: ${_decodeJavaScriptStringResult(result)}',
|
|
);
|
|
} catch (error) {
|
|
debugPrint('[H5Shell] loaded H5 snapshot failed: $error');
|
|
}
|
|
}
|
|
|
|
String _decodeJavaScriptStringResult(Object? result) {
|
|
if (result == null) {
|
|
return '';
|
|
}
|
|
if (result is String) {
|
|
try {
|
|
final decoded = jsonDecode(result);
|
|
if (decoded is String) {
|
|
return decoded;
|
|
}
|
|
} catch (_) {}
|
|
return result;
|
|
}
|
|
return result.toString();
|
|
}
|
|
|
|
Future<void> _loadHome() async {
|
|
await _loadUrl(_freshHomeUrl());
|
|
}
|
|
|
|
Future<void> _loadUrl(String url) async {
|
|
if (mounted) {
|
|
setState(() {
|
|
_loadError = null;
|
|
_progress = 0;
|
|
_showShellCover = true;
|
|
});
|
|
}
|
|
|
|
await _prepareWebViewForFreshLoad();
|
|
|
|
await _controller.loadRequest(
|
|
Uri.parse(url),
|
|
headers: _noCacheHeaders,
|
|
);
|
|
}
|
|
|
|
Future<NavigationDecision> _handleNavigationRequest(
|
|
NavigationRequest request,
|
|
) async {
|
|
unawaited(_stopWebMedia());
|
|
|
|
final uri = Uri.tryParse(request.url);
|
|
if (uri == null) {
|
|
return NavigationDecision.prevent;
|
|
}
|
|
|
|
const webSchemes = {'http', 'https', 'about', 'data'};
|
|
if (webSchemes.contains(uri.scheme)) {
|
|
return NavigationDecision.navigate;
|
|
}
|
|
|
|
try {
|
|
await launchUrl(uri, mode: LaunchMode.externalApplication);
|
|
} catch (_) {
|
|
// Ignore unsupported custom schemes so the WebView does not navigate to
|
|
// an error page.
|
|
}
|
|
return NavigationDecision.prevent;
|
|
}
|
|
|
|
Future<void> _handleWebViewPermissionRequest(
|
|
WebViewPermissionRequest request,
|
|
) async {
|
|
final permissions = <Permission>{};
|
|
if (request.types.contains(WebViewPermissionResourceType.camera)) {
|
|
permissions.add(Permission.camera);
|
|
}
|
|
if (request.types.contains(WebViewPermissionResourceType.microphone)) {
|
|
permissions.add(Permission.microphone);
|
|
}
|
|
|
|
debugPrint(
|
|
'[H5Shell] WebView media permission request: '
|
|
'${request.types.map((type) => type.name).join(', ')}',
|
|
);
|
|
|
|
final statusesByPermission = await _requestPermissions(permissions);
|
|
final allowed = statusesByPermission.values.every(_isPermissionAllowed);
|
|
debugPrint(
|
|
'[H5Shell] WebView media permission result: '
|
|
'${statusesByPermission.map((permission, status) => MapEntry(permission.toString(), status.toString()))}',
|
|
);
|
|
|
|
if (allowed) {
|
|
await request.grant();
|
|
} else {
|
|
await request.deny();
|
|
}
|
|
}
|
|
|
|
bool _isPermissionAllowed(PermissionStatus status) {
|
|
return status.isGranted || status.isLimited;
|
|
}
|
|
|
|
Future<Map<Permission, PermissionStatus>> _requestPermissions(
|
|
Set<Permission> permissions,
|
|
) async {
|
|
if (permissions.isEmpty) {
|
|
return const {};
|
|
}
|
|
|
|
final pending = <Permission>[];
|
|
final statuses = <Permission, PermissionStatus>{};
|
|
|
|
for (final permission in permissions) {
|
|
final status = await permission.status;
|
|
if (_isPermissionAllowed(status) ||
|
|
status.isPermanentlyDenied ||
|
|
status.isRestricted) {
|
|
statuses[permission] = status;
|
|
} else {
|
|
pending.add(permission);
|
|
}
|
|
}
|
|
|
|
if (pending.isNotEmpty) {
|
|
statuses.addAll(await pending.request());
|
|
}
|
|
|
|
return statuses;
|
|
}
|
|
|
|
Future<bool> _requestPermission(Permission permission) async {
|
|
final statuses = await _requestPermissions({permission});
|
|
return statuses.values.every(_isPermissionAllowed);
|
|
}
|
|
|
|
Future<void> _handleBackNavigation() async {
|
|
await _stopWebMedia();
|
|
if (await _controller.canGoBack()) {
|
|
await _controller.goBack();
|
|
} else {
|
|
await SystemNavigator.pop();
|
|
}
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return PopScope(
|
|
canPop: false,
|
|
onPopInvokedWithResult: (didPop, _) {
|
|
if (!didPop) {
|
|
unawaited(_handleBackNavigation());
|
|
}
|
|
},
|
|
child: Scaffold(
|
|
backgroundColor: _shellBackground,
|
|
body: SafeArea(
|
|
bottom: false,
|
|
child: Stack(
|
|
children: [
|
|
const Positioned.fill(child: _ShellFallback()),
|
|
WebViewWidget(controller: _controller),
|
|
if (_showShellCover)
|
|
const Positioned.fill(
|
|
child: IgnorePointer(child: _ShellFallback()),
|
|
),
|
|
if (_progress < 100)
|
|
LinearProgressIndicator(
|
|
value: _progress == 0 ? null : _progress / 100,
|
|
minHeight: 2,
|
|
),
|
|
if (_loadError != null)
|
|
_ErrorPanel(
|
|
message: _loadError!,
|
|
onRetry: () => unawaited(_loadHome()),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _ErrorPanel extends StatelessWidget {
|
|
const _ErrorPanel({required this.message, required this.onRetry});
|
|
|
|
final String message;
|
|
final VoidCallback onRetry;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return ColoredBox(
|
|
color: Colors.white,
|
|
child: Center(
|
|
child: Padding(
|
|
padding: const EdgeInsets.all(24),
|
|
child: Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
children: [
|
|
const Icon(Icons.wifi_off_rounded, size: 44),
|
|
const SizedBox(height: 16),
|
|
const Text(
|
|
'页面加载失败',
|
|
style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
|
|
),
|
|
const SizedBox(height: 8),
|
|
Text(
|
|
message,
|
|
textAlign: TextAlign.center,
|
|
style: Theme.of(context).textTheme.bodyMedium,
|
|
),
|
|
const SizedBox(height: 20),
|
|
FilledButton(
|
|
onPressed: onRetry,
|
|
child: const Text('重新加载'),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _ShellFallback extends StatelessWidget {
|
|
const _ShellFallback();
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return DecoratedBox(
|
|
decoration: const BoxDecoration(
|
|
gradient: LinearGradient(
|
|
begin: Alignment.topCenter,
|
|
end: Alignment.bottomCenter,
|
|
colors: [
|
|
Color(0xFFE7F4FF),
|
|
_shellBackground,
|
|
Colors.white,
|
|
],
|
|
stops: [0, 0.44, 1],
|
|
),
|
|
),
|
|
child: Stack(
|
|
children: [
|
|
const Positioned(
|
|
top: 44,
|
|
right: -72,
|
|
child: _SoftCircle(size: 190, opacity: 0.42),
|
|
),
|
|
const Positioned(
|
|
top: 210,
|
|
left: -44,
|
|
child: _SoftCircle(size: 160, opacity: 0.34),
|
|
),
|
|
const Positioned(
|
|
right: -54,
|
|
bottom: 250,
|
|
child: _SoftCircle(size: 220, opacity: 0.38),
|
|
),
|
|
Center(
|
|
child: Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
children: const [
|
|
_ShellMark(),
|
|
SizedBox(height: 26),
|
|
Text(
|
|
'心有回响',
|
|
style: TextStyle(
|
|
color: _shellAccent,
|
|
fontSize: 26,
|
|
height: 1.2,
|
|
fontWeight: FontWeight.w700,
|
|
letterSpacing: 0,
|
|
),
|
|
),
|
|
SizedBox(height: 10),
|
|
Text(
|
|
'正在为你唤醒会话',
|
|
style: TextStyle(
|
|
color: _shellSubText,
|
|
fontSize: 13,
|
|
height: 1.2,
|
|
letterSpacing: 0,
|
|
),
|
|
),
|
|
SizedBox(height: 32),
|
|
SizedBox(
|
|
width: 110,
|
|
child: LinearProgressIndicator(
|
|
minHeight: 3,
|
|
backgroundColor: Color(0xFFDCEEFF),
|
|
color: _shellAccent,
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _ShellMark extends StatelessWidget {
|
|
const _ShellMark();
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
width: 126,
|
|
height: 126,
|
|
decoration: BoxDecoration(
|
|
shape: BoxShape.circle,
|
|
gradient: const LinearGradient(
|
|
begin: Alignment.topLeft,
|
|
end: Alignment.bottomRight,
|
|
colors: [Color(0xFFA8DDFF), _shellAccent, Color(0xFF0066E8)],
|
|
),
|
|
boxShadow: [
|
|
BoxShadow(
|
|
color: _shellAccent.withValues(alpha: 0.2),
|
|
blurRadius: 34,
|
|
offset: const Offset(0, 18),
|
|
),
|
|
],
|
|
),
|
|
child: const Icon(
|
|
Icons.check_rounded,
|
|
color: Colors.white,
|
|
size: 82,
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _SoftCircle extends StatelessWidget {
|
|
const _SoftCircle({required this.size, required this.opacity});
|
|
|
|
final double size;
|
|
final double opacity;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
width: size,
|
|
height: size,
|
|
decoration: BoxDecoration(
|
|
shape: BoxShape.circle,
|
|
color: const Color(0xFFBFE4FF).withValues(alpha: opacity),
|
|
),
|
|
);
|
|
}
|
|
}
|