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[Shared Resources] dart-sass implementation (sass#2134)
Co-authored-by: James Stuckey Weber <jamesnw@gmail.com> Co-authored-by: Jonny Gerig Meyer <jonny@oddbird.net>
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// Copyright 2024 Google LLC. Use of this source code is governed by an | ||
// MIT-style license that can be found in the LICENSE file or at | ||
// https://opensource.org/licenses/MIT. | ||
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import 'dart:js_util'; | ||
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import 'package:async/async.dart'; | ||
import 'package:node_interop/js.dart'; | ||
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import 'compile.dart'; | ||
import 'compile_options.dart'; | ||
import 'reflection.dart'; | ||
import 'utils.dart'; | ||
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/// The Dart Compiler class. | ||
class Compiler { | ||
/// A flag signifying whether the instance has been disposed. | ||
bool _disposed = false; | ||
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/// Checks if `dispose()` has been called on this instance, and throws an | ||
/// error if it has. Used to verify that compilation methods are not called | ||
/// after disposal. | ||
void _throwIfDisposed() { | ||
if (_disposed) { | ||
jsThrow(JsError('Compiler has already been disposed.')); | ||
} | ||
} | ||
} | ||
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/// The Dart Async Compiler class. | ||
class AsyncCompiler extends Compiler { | ||
/// A set of all compilations, tracked to ensure all compilations complete | ||
/// before async disposal resolves. | ||
final FutureGroup<void> compilations = FutureGroup(); | ||
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/// Adds a compilation to the FutureGroup. | ||
void addCompilation(Promise compilation) { | ||
Future<dynamic> comp = promiseToFuture(compilation); | ||
var wrappedComp = comp.catchError((err) { | ||
/// Ignore errors so FutureGroup doesn't close when a compilation fails. | ||
}); | ||
compilations.add(wrappedComp); | ||
} | ||
} | ||
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/// The JavaScript `Compiler` class. | ||
final JSClass compilerClass = () { | ||
var jsClass = createJSClass( | ||
'sass.Compiler', | ||
(Object self) => { | ||
jsThrow(JsError(("Compiler can not be directly constructed. " | ||
"Please use `sass.initCompiler()` instead."))) | ||
}); | ||
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jsClass.defineMethods({ | ||
'compile': (Compiler self, String path, [CompileOptions? options]) { | ||
self._throwIfDisposed(); | ||
return compile(path, options); | ||
}, | ||
'compileString': (Compiler self, String source, | ||
[CompileStringOptions? options]) { | ||
self._throwIfDisposed(); | ||
return compileString(source, options); | ||
}, | ||
'dispose': (Compiler self) { | ||
self._disposed = true; | ||
}, | ||
}); | ||
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getJSClass(Compiler()).injectSuperclass(jsClass); | ||
return jsClass; | ||
}(); | ||
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Compiler initCompiler() => Compiler(); | ||
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/// The JavaScript `AsyncCompiler` class. | ||
final JSClass asyncCompilerClass = () { | ||
var jsClass = createJSClass( | ||
'sass.AsyncCompiler', | ||
(Object self) => { | ||
jsThrow(JsError(("AsyncCompiler can not be directly constructed. " | ||
"Please use `sass.initAsyncCompiler()` instead."))) | ||
}); | ||
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jsClass.defineMethods({ | ||
'compileAsync': (AsyncCompiler self, String path, | ||
[CompileOptions? options]) { | ||
self._throwIfDisposed(); | ||
var compilation = compileAsync(path, options); | ||
self.addCompilation(compilation); | ||
return compilation; | ||
}, | ||
'compileStringAsync': (AsyncCompiler self, String source, | ||
[CompileStringOptions? options]) { | ||
self._throwIfDisposed(); | ||
var compilation = compileStringAsync(source, options); | ||
self.addCompilation(compilation); | ||
return compilation; | ||
}, | ||
'dispose': (AsyncCompiler self) { | ||
self._disposed = true; | ||
return futureToPromise((() async { | ||
self.compilations.close(); | ||
await self.compilations.future; | ||
})()); | ||
} | ||
}); | ||
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getJSClass(AsyncCompiler()).injectSuperclass(jsClass); | ||
return jsClass; | ||
}(); | ||
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Promise initAsyncCompiler() => futureToPromise((() async => AsyncCompiler())()); |
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## 9.3.0 | ||
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* No user-visible changes. | ||
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## 9.2.7 | ||
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* No user-visible changes. | ||
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