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170 changes: 87 additions & 83 deletions frontend/appflowy_flutter/web/index.html
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Original file line number Diff line number Diff line change
@@ -1,101 +1,105 @@
<!DOCTYPE html>
<html>
<html lang="en">
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.

The path provided below has to start and end with a slash "/" in order for
it to work correctly.

For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base

This is a placeholder for base href that will be replaced by the value of
the `--base-href` argument provided to `flutter build`.
-->
<base href="$FLUTTER_BASE_HREF">
<base href="/" />

<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Flutter Web App">

<!-- iOS meta tags & icons -->
<!-- App title & icons -->
<title>AppFlowy Flutter</title>
<link rel="manifest" href="manifest.json">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="appflowy_flutter">
<link rel="apple-touch-icon" href="icons/Icon-192.png">

<title>appflowy_flutter</title>
<link rel="manifest" href="manifest.json">
<!-- 🌈 Loading Screen Styles -->
<style>
body {
margin: 0;
padding: 0;
height: 100vh;
background: linear-gradient(135deg, #e3f2fd, #bbdefb);
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
font-family: 'Segoe UI', Arial, sans-serif;
color: #0d47a1;
}

#loading-container {
text-align: center;
}

#loading-logo {
width: 100px;
height: 100px;
margin-bottom: 20px;
animation: fadeIn 1.2s ease-in-out;
}

#loading-text {
font-size: 1.3rem;
font-weight: 600;
margin-top: 10px;
animation: pulse 2s infinite;
}

.spinner {
width: 50px;
height: 50px;
border: 5px solid rgba(13, 71, 161, 0.2);
border-top-color: #0d47a1;
border-radius: 50%;
animation: spin 1s linear infinite;
margin: 0 auto;
}

@keyframes spin {
to { transform: rotate(360deg); }
}

@keyframes pulse {
0%, 100% { opacity: 0.7; }
50% { opacity: 1; }
}

@keyframes fadeIn {
from { opacity: 0; transform: scale(0.9); }
to { opacity: 1; transform: scale(1); }
}
</style>
</head>
<body>
<!-- This script installs service_worker.js to provide PWA functionality to
application. For more information, see:
https://developers.google.com/web/fundamentals/primers/service-workers -->
<script>
var serviceWorkerVersion = null;
var scriptLoaded = false;
function loadMainDartJs() {
if (scriptLoaded) {
return;
}
scriptLoaded = true;
var scriptTag = document.createElement('script');
scriptTag.src = 'main.dart.js';
scriptTag.type = 'application/javascript';
document.body.append(scriptTag);
}
<!-- 🌟 Loading Screen -->
<div id="loading-container">
<img id="loading-logo" src="icons/Icon-192.png" alt="App Logo">
<div class="spinner"></div>
<div id="loading-text">Loading AppFlowy Flutter...</div>
</div>

if ('serviceWorker' in navigator) {
// Service workers are supported. Use them.
window.addEventListener('load', function () {
// Wait for registration to finish before dropping the <script> tag.
// Otherwise, the browser will load the script multiple times,
// potentially different versions.
var serviceWorkerUrl = 'flutter_service_worker.js?v=' + serviceWorkerVersion;
navigator.serviceWorker.register(serviceWorkerUrl)
.then((reg) => {
function waitForActivation(serviceWorker) {
serviceWorker.addEventListener('statechange', () => {
if (serviceWorker.state == 'activated') {
console.log('Installed new service worker.');
loadMainDartJs();
}
});
}
if (!reg.active && (reg.installing || reg.waiting)) {
// No active web worker and we have installed or are installing
// one for the first time. Simply wait for it to activate.
waitForActivation(reg.installing ?? reg.waiting);
} else if (!reg.active.scriptURL.endsWith(serviceWorkerVersion)) {
// When the app updates the serviceWorkerVersion changes, so we
// need to ask the service worker to update.
console.log('New service worker available.');
reg.update();
waitForActivation(reg.installing);
} else {
// Existing service worker is still good.
console.log('Loading app from service worker.');
loadMainDartJs();
}
<!-- 🚀 Flutter Web Bootstrap -->
<script src="flutter.js" defer></script>
<script>
window.addEventListener('load', function() {
_flutter.loader.loadEntrypoint({
serviceWorker: {
serviceWorkerVersion: null,
},
onEntrypointLoaded: function(engineInitializer) {
engineInitializer.initializeEngine().then(function(appRunner) {
// Remove the loading screen
document.getElementById('loading-container').remove();
// Run the Flutter app
appRunner.runApp();
});

// If service worker doesn't succeed in a reasonable amount of time,
// fallback to plain <script> tag.
setTimeout(() => {
if (!scriptLoaded) {
console.warn(
'Failed to load app from service worker. Falling back to plain <script> tag.',
);
loadMainDartJs();
}
}, 4000);
},
});
} else {
// Service workers not supported. Just drop the <script> tag.
loadMainDartJs();
}
});
</script>
</body>
</html>