mirror of
https://github.com/flutter/flutter.git
synced 2025-06-03 00:51:18 +00:00
105 lines
3.4 KiB
Dart
105 lines
3.4 KiB
Dart
// Copyright 2019 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
import 'package:meta/meta.dart';
|
|
|
|
/// The JavaScript bootstrap script to support in-browser hot restart.
|
|
///
|
|
/// The [requireUrl] loads our cached RequireJS script file. The [mapperUrl]
|
|
/// loads the special Dart stack trace mapper. The [entrypoint] is the
|
|
/// actual main.dart file.
|
|
///
|
|
/// This file is served when the browser requests "main.dart.js" in debug mode,
|
|
/// and is responsible for bootstraping the RequireJS modules and attaching
|
|
/// the hot reload hooks.
|
|
String generateBootstrapScript({
|
|
@required String requireUrl,
|
|
@required String mapperUrl,
|
|
@required String entrypoint,
|
|
}) {
|
|
return '''
|
|
"use strict";
|
|
|
|
// Attach source mapping.
|
|
var mapperEl = document.createElement("script");
|
|
mapperEl.defer = true;
|
|
mapperEl.async = false;
|
|
mapperEl.src = "$mapperUrl";
|
|
document.head.appendChild(mapperEl);
|
|
|
|
// Attach require JS.
|
|
var requireEl = document.createElement("script");
|
|
requireEl.defer = true;
|
|
requireEl.async = false;
|
|
requireEl.src = "$requireUrl";
|
|
// This attribute tells require JS what to load as main (defined below).
|
|
requireEl.setAttribute("data-main", "main_module");
|
|
document.head.appendChild(requireEl);
|
|
|
|
// Invoked by connected chrome debugger for hot reload/restart support.
|
|
window.\$hotReloadHook = function(modules) {
|
|
return new Promise(function(resolve, reject) {
|
|
if (modules == null) {
|
|
reject();
|
|
}
|
|
// If no modules change, return immediately.
|
|
if (modules.length == 0) {
|
|
resolve();
|
|
}
|
|
var reloadCount = 0;
|
|
for (var i = 0; i < modules.length; i++) {
|
|
require.undef(modules[i]);
|
|
require([modules[i]], function(module) {
|
|
reloadCount += 1;
|
|
// once we've reloaded every module, trigger the hot reload.
|
|
if (reloadCount == modules.length) {
|
|
require(["$entrypoint", "dart_sdk"], function(app, dart_sdk) {
|
|
window.\$mainEntrypoint = app.main.main;
|
|
window.\$hotReload(resolve);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
});
|
|
}
|
|
''';
|
|
}
|
|
|
|
/// Generate a synthetic main module which captures the application's main
|
|
/// method.
|
|
String generateMainModule({@required String entrypoint}) {
|
|
return '''
|
|
// Create the main module loaded below.
|
|
define("main_module", ["$entrypoint", "dart_sdk"], function(app, dart_sdk) {
|
|
dart_sdk.dart.setStartAsyncSynchronously(true);
|
|
dart_sdk._isolate_helper.startRootIsolate(() => {}, []);
|
|
dart_sdk._debugger.registerDevtoolsFormatter();
|
|
let voidToNull = () => (voidToNull = dart_sdk.dart.constFn(dart_sdk.dart.fnType(dart_sdk.core.Null, [dart_sdk.dart.void])))();
|
|
|
|
// Attach the main entrypoint and hot reload functionality to the window.
|
|
window.\$mainEntrypoint = app.main.main;
|
|
if (window.\$hotReload == null) {
|
|
window.\$hotReload = function(cb) {
|
|
dart_sdk.developer.invokeExtension("ext.flutter.disassemble", "{}").then((_) => {
|
|
dart_sdk.dart.hotRestart();
|
|
dart_sdk.ui.webOnlyInitializePlatform().then(dart_sdk.core.Null, dart_sdk.dart.fn(_ => {
|
|
window.\$mainEntrypoint();
|
|
window.requestAnimationFrame(cb);
|
|
}, voidToNull()));
|
|
});
|
|
}
|
|
}
|
|
|
|
dart_sdk.ui.webOnlyInitializePlatform().then(dart_sdk.core.Null, dart_sdk.dart.fn(_ => {
|
|
app.main.main();
|
|
}, voidToNull()));
|
|
});
|
|
|
|
// Require JS configuration.
|
|
require.config({
|
|
waitSeconds: 0,
|
|
});
|
|
''';
|
|
}
|