try.dartlang.org version 5.

dart/site/try/compiler_isolate.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library compiler_isolate;
+
+import 'dart:async';
+import 'dart:html';
+import 'dart:isolate';
+import 'dart:uri';
+import 'dart:json' show parse;
+
+import '../sdk/lib/_internal/compiler/compiler.dart' as compiler;
+
+const bool THROW_ON_ERROR = false;
+
+final cachedSources = new Map<Uri, String>();
+
+Uri sdkLocation;
+List options = [];
+
+compile(source, SendPort replyTo) {
+  if (sdkLocation == null) {
+    // The first message received gives us the URI of this web app.
+    if (source.endsWith('/sdk.dart')) {
+      var request = new HttpRequest();
+      request.open('GET', source, async: false);
+      request.send(null);
+      sdkLocation = Uri.parse('sdk:/sdk/');
+      parse(request.responseText).forEach((file, content) {
+        cachedSources[Uri.parse('sdk:/$file')] = content;
+      });
+    } else {
+      sdkLocation = Uri.parse(source);
+    }
+    replyTo.send(null);
+    return;
+  }
+  if (source is List) {
+    String messageType = (source.length > 0) ? source[0] : null;
+    var data = (source.length > 1) ? source[1] : null;
+    if (messageType == 'options') {
+      options = data as List;
+    }
+    return;
+  }
+  int charactersRead = 0;
+  Future<String> inputProvider(Uri uri) {
+    if (uri.path.endsWith('/lib/html/dart2js/html_dart2js.dart')) {
+      replyTo.send('dart:html');
+    }
+    if (uri.scheme == 'sdk') {
+      var value = cachedSources[uri];
+      charactersRead += value.length;
+      return new Future.value(value);
+    } else if (uri.scheme == 'http' || uri.scheme == 'https') {
+      var value = cachedSources.putIfAbsent(uri, () {
+        var request = new HttpRequest();
+        request.open('GET', '$uri', async: false);
+        request.send(null);
+        return request.responseText;
+      });
+      charactersRead += value.length;
+      return new Future.value(value);
+    } else if ('$uri' == 'memory:/main.dart') {
+      charactersRead += source.length;
+      return new Future.value(source);
+    }
+    throw new Exception('Error: Cannot read: $uri');
+  }
+  void handler(Uri uri, int begin, int end,
+               String message, compiler.Diagnostic kind) {
+    replyTo.send(['diagnostic', { 'uri': '$uri',
+                                  'begin': begin,
+                                  'end': end,
+                                  'message': message,
+                                  'kind': kind.name }]);
+    if (THROW_ON_ERROR && kind == compiler.Diagnostic.ERROR) {
+      throw new Exception('Throw on error');
+    }
+  }
+  compiler.compile(new Uri('memory:/main.dart'),
+                   sdkLocation,
+                   null,
+                   inputProvider,
+                   handler,
+                   options).then((js) {
+    try {
+      if (js == null) {
+        if (!options.contains('--analyze-only')) replyTo.send('failed');
+      } else {
+        var url;
+        if (options.contains('--verbose')) {
+          handler(null, 0, 0,
+                  'Compiled ${source.length}/${charactersRead} characters Dart'
+                  ' -> ${js.length} characters.',
+                  compiler.Diagnostic.VERBOSE_INFO);
+        }
+        try {
+          // At least Safari and Firefox do not support creating an
+          // object URL from a web worker.  MDN claims that it will be
+          // supported in Firefox 21.
+          url = Url.createObjectUrl(new Blob([js], 'application/javascript'));
+        } catch (_) {
+          // Ignored.
+        }
+        if (url != null) {
+          replyTo.send(['url', url]);
+        } else {
+          replyTo.send(['code', js]);
+        }
+      }
+    } catch (e, trace) {
+      replyTo.send(['crash', '$e, $trace']);
+    }
+    replyTo.send('done');
+  });
+}