dartfmt pkg/compiler

pkg/compiler/lib/src/apiimpl.dart

 // Copyright (c) 2012, 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 leg_apiimpl;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:package_config/packages.dart';
 import 'package:package_config/packages_file.dart' as pkgs;
-import 'package:package_config/src/packages_impl.dart' show
-    MapPackages,
-    NonFilePackagesDirectoryPackages;
-import 'package:package_config/src/util.dart' show
-    checkValidPackageUri;
+import 'package:package_config/src/packages_impl.dart'
+    show MapPackages, NonFilePackagesDirectoryPackages;
+import 'package:package_config/src/util.dart' show checkValidPackageUri;
 
 import '../compiler_new.dart' as api;
 import 'common.dart';
-import 'common/tasks.dart' show
-    GenericTask;
+import 'common/tasks.dart' show GenericTask;
 import 'compiler.dart';
-import 'diagnostics/messages.dart' show
-    Message;
+import 'diagnostics/messages.dart' show Message;
 import 'elements/elements.dart' as elements;
 import 'environment.dart';
 import 'io/source_file.dart';
-import 'options.dart' show
-    CompilerOptions;
+import 'options.dart' show CompilerOptions;
 import 'platform_configuration.dart' as platform_configuration;
 import 'script.dart';
 
-
 /// Implements the [Compiler] using a [api.CompilerInput] for supplying the
 /// sources.
 class CompilerImpl extends Compiler {
   api.CompilerInput provider;
   api.CompilerDiagnostics handler;
   Packages packages;
   bool mockableLibraryUsed = false;
 
   /// A mapping of the dart: library-names to their location.
   ///
   /// Initialized in [setupSdk].
   Map<String, Uri> sdkLibraries;
 
   GenericTask userHandlerTask;
   GenericTask userProviderTask;
   GenericTask userPackagesDiscoveryTask;
 
   Uri get libraryRoot => options.platformConfigUri.resolve(".");
 
-  CompilerImpl(this.provider, api.CompilerOutput outputProvider,
-      this.handler, CompilerOptions options)
-      : super(options: options, outputProvider: outputProvider,
-          environment: new _Environment(options.environment)) {
+  CompilerImpl(this.provider, api.CompilerOutput outputProvider, this.handler,
+      CompilerOptions options)
+      : super(
+            options: options,
+            outputProvider: outputProvider,
+            environment: new _Environment(options.environment)) {
     _Environment env = environment;
     env.compiler = this;
     tasks.addAll([
-        userHandlerTask = new GenericTask('Diagnostic handler', this),
-        userProviderTask = new GenericTask('Input provider', this),
-        userPackagesDiscoveryTask =
-            new GenericTask('Package discovery', this),
+      userHandlerTask = new GenericTask('Diagnostic handler', this),
+      userProviderTask = new GenericTask('Input provider', this),
+      userPackagesDiscoveryTask = new GenericTask('Package discovery', this),
     ]);
   }
 
-
   void log(message) {
     callUserHandler(
         null, null, null, null, message, api.Diagnostic.VERBOSE_INFO);
   }
 
   /// See [Compiler.translateResolvedUri].
   Uri translateResolvedUri(elements.LibraryElement importingLibrary,
-                           Uri resolvedUri, Spannable spannable) {
+      Uri resolvedUri, Spannable spannable) {
     if (resolvedUri.scheme == 'dart') {
       return translateDartUri(importingLibrary, resolvedUri, spannable);
     }
     return resolvedUri;
   }
 
   /**
    * Reads the script designated by [readableUri].
    */
   Future<Script> readScript(Uri readableUri, [Spannable node]) {
     if (!readableUri.isAbsolute) {
       if (node == null) node = NO_LOCATION_SPANNABLE;
-      reporter.internalError(node,
-          'Relative uri $readableUri provided to readScript(Uri).');
+      reporter.internalError(
+          node, 'Relative uri $readableUri provided to readScript(Uri).');
     }
 
     // We need to store the current element since we are reporting read errors
     // asynchronously and therefore need to restore the current element for
     // [node] to be valid.
     elements.Element element = currentElement;
     void reportReadError(exception) {
       if (element == null || node == null) {
         reporter.reportErrorMessage(
             new SourceSpan(readableUri, 0, 0),
             MessageKind.READ_SELF_ERROR,
             {'uri': readableUri, 'exception': exception});
       } else {
         reporter.withCurrentElement(element, () {
-          reporter.reportErrorMessage(
-              node,
-              MessageKind.READ_SCRIPT_ERROR,
+          reporter.reportErrorMessage(node, MessageKind.READ_SCRIPT_ERROR,
               {'uri': readableUri, 'exception': exception});
         });
       }
     }
 
     Uri resourceUri = translateUri(node, readableUri);
     if (resourceUri == null) return _synthesizeScript(readableUri);
     if (resourceUri.scheme == 'dart-ext') {
       if (!options.allowNativeExtensions) {
         reporter.withCurrentElement(element, () {
-          reporter.reportErrorMessage(
-              node, MessageKind.DART_EXT_NOT_SUPPORTED);
+          reporter.reportErrorMessage(node, MessageKind.DART_EXT_NOT_SUPPORTED);
         });
       }
       return _synthesizeScript(readableUri);
     }
 
     // TODO(johnniwinther): Wrap the result from [provider] in a specialized
     // [Future] to ensure that we never execute an asynchronous action without
     // setting up the current element of the compiler.
     return new Future.sync(() => callUserProvider(resourceUri)).then((data) {
       SourceFile sourceFile;
       if (data is List<int>) {
         sourceFile = new Utf8BytesSourceFile(resourceUri, data);
       } else if (data is String) {
         sourceFile = new StringSourceFile.fromUri(resourceUri, data);
       } else {
         String message = "Expected a 'String' or a 'List<int>' from the input "
-                         "provider, but got: ${Error.safeToString(data)}.";
+            "provider, but got: ${Error.safeToString(data)}.";
         reportReadError(message);
       }
       // We use [readableUri] as the URI for the script since need to preserve
       // the scheme in the script because [Script.uri] is used for resolving
       // relative URIs mentioned in the script. See the comment on
       // [LibraryLoader] for more details.
       return new Script(readableUri, resourceUri, sourceFile);
     }).catchError((error) {
       reportReadError(error);
       return _synthesizeScript(readableUri);
@@ skipping 15 matching lines @@
   /// Translates "resolvedUri" with scheme "dart" to a [uri] resolved relative
   /// to `options.platformConfigUri` according to the information in the file at
   /// `options.platformConfigUri`.
   ///
   /// Returns null and emits an error if the library could not be found or
   /// imported into [importingLibrary].
   ///
   /// Internal libraries (whose name starts with '_') can be only resolved if
   /// [importingLibrary] is a platform or patch library.
   Uri translateDartUri(elements.LibraryElement importingLibrary,
-                       Uri resolvedUri, Spannable spannable) {
-
+      Uri resolvedUri, Spannable spannable) {
     Uri location = lookupLibraryUri(resolvedUri.path);
 
     if (location == null) {
-      reporter.reportErrorMessage(
-          spannable,
-          MessageKind.LIBRARY_NOT_FOUND,
+      reporter.reportErrorMessage(spannable, MessageKind.LIBRARY_NOT_FOUND,
           {'resolvedUri': resolvedUri});
       return null;
     }
 
-    if (resolvedUri.path.startsWith('_')  ) {
+    if (resolvedUri.path.startsWith('_')) {
       bool allowInternalLibraryAccess = importingLibrary != null &&
           (importingLibrary.isPlatformLibrary ||
               importingLibrary.isPatch ||
               importingLibrary.canonicalUri.path
                   .contains('sdk/tests/compiler/dart2js_native'));
 
       if (!allowInternalLibraryAccess) {
         if (importingLibrary != null) {
           reporter.reportErrorMessage(
-              spannable,
-              MessageKind.INTERNAL_LIBRARY_FROM,
-              {'resolvedUri': resolvedUri,
-                'importingUri': importingLibrary.canonicalUri});
+              spannable, MessageKind.INTERNAL_LIBRARY_FROM, {
+            'resolvedUri': resolvedUri,
+            'importingUri': importingLibrary.canonicalUri
+          });
         } else {
-          reporter.reportErrorMessage(
-              spannable,
-              MessageKind.INTERNAL_LIBRARY,
+          reporter.reportErrorMessage(spannable, MessageKind.INTERNAL_LIBRARY,
               {'resolvedUri': resolvedUri});
           registerDisallowedLibraryUse(resolvedUri);
         }
         return null;
       }
     }
 
     if (location.scheme == "unsupported") {
-      reporter.reportErrorMessage(
-          spannable,
-          MessageKind.LIBRARY_NOT_SUPPORTED,
+      reporter.reportErrorMessage(spannable, MessageKind.LIBRARY_NOT_SUPPORTED,
           {'resolvedUri': resolvedUri});
       registerDisallowedLibraryUse(resolvedUri);
       return null;
     }
 
-    if (resolvedUri.path == 'html' ||
-        resolvedUri.path == 'io') {
+    if (resolvedUri.path == 'html' || resolvedUri.path == 'io') {
       // TODO(ahe): Get rid of mockableLibraryUsed when test.dart
       // supports this use case better.
       mockableLibraryUsed = true;
     }
     return location;
   }
 
   Uri translatePackageUri(Spannable node, Uri uri) {
     try {
       checkValidPackageUri(uri);
     } on ArgumentError catch (e) {
-      reporter.reportErrorMessage(
-          node,
-          MessageKind.INVALID_PACKAGE_URI,
+      reporter.reportErrorMessage(node, MessageKind.INVALID_PACKAGE_URI,
           {'uri': uri, 'exception': e.message});
       return null;
     }
-    return packages.resolve(uri,
-        notFound: (Uri notFound) {
-          reporter.reportErrorMessage(
-              node,
-              MessageKind.LIBRARY_NOT_FOUND,
-              {'resolvedUri': uri});
-          return null;
-        });
+    return packages.resolve(uri, notFound: (Uri notFound) {
+      reporter.reportErrorMessage(
+          node, MessageKind.LIBRARY_NOT_FOUND, {'resolvedUri': uri});
+      return null;
+    });
   }
 
-  Future<elements.LibraryElement> analyzeUri(
-      Uri uri,
+  Future<elements.LibraryElement> analyzeUri(Uri uri,
       {bool skipLibraryWithPartOfTag: true}) {
     List<Future> setupFutures = new List<Future>();
     if (sdkLibraries == null) {
       setupFutures.add(setupSdk());
     }
     if (packages == null) {
       setupFutures.add(setupPackages(uri));
     }
     return Future.wait(setupFutures).then((_) {
-      return super.analyzeUri(uri,
-          skipLibraryWithPartOfTag: skipLibraryWithPartOfTag);
+      return super
+          .analyzeUri(uri, skipLibraryWithPartOfTag: skipLibraryWithPartOfTag);
     });
   }
 
   Future setupPackages(Uri uri) {
     if (options.packageRoot != null) {
       // Use "non-file" packages because the file version requires a [Directory]
       // and we can't depend on 'dart:io' classes.
       packages = new NonFilePackagesDirectoryPackages(options.packageRoot);
     } else if (options.packageConfig != null) {
       return callUserProvider(options.packageConfig).then((configContents) {
         if (configContents is String) {
           configContents = UTF8.encode(configContents);
         }
         // The input provider may put a trailing 0 byte when it reads a source
         // file, which confuses the package config parser.
-        if (configContents.length > 0 &&
-            configContents.last == 0) {
+        if (configContents.length > 0 && configContents.last == 0) {
           configContents = configContents.sublist(0, configContents.length - 1);
         }
-        packages = new MapPackages(
-            pkgs.parse(configContents, options.packageConfig));
+        packages =
+            new MapPackages(pkgs.parse(configContents, options.packageConfig));
       }).catchError((error) {
         reporter.reportErrorMessage(
             NO_LOCATION_SPANNABLE,
             MessageKind.INVALID_PACKAGE_CONFIG,
             {'uri': options.packageConfig, 'exception': error});
         packages = Packages.noPackages;
       });
     } else {
       if (options.packagesDiscoveryProvider == null) {
         packages = Packages.noPackages;
       } else {
         return callUserPackagesDiscovery(uri).then((p) {
           packages = p;
         });
       }
     }
     return new Future.value();
   }
 
   Future<Null> setupSdk() {
     if (sdkLibraries == null) {
-      return platform_configuration.load(options.platformConfigUri, provider)
+      return platform_configuration
+          .load(options.platformConfigUri, provider)
           .then((Map<String, Uri> mapping) {
         sdkLibraries = mapping;
       });
     } else {
       // The incremental compiler sets up the sdk before run.
       // Therefore this will be called a second time.
       return new Future.value(null);
     }
   }
 
@@ skipping 19 matching lines @@
         }
         int total = totalCompileTime.elapsedMilliseconds;
         log('Total compile-time ${total}msec;'
             ' unaccounted ${total - cumulated}msec');
         return success;
       });
     });
   }
 
   void reportDiagnostic(DiagnosticMessage message,
-                        List<DiagnosticMessage> infos,
-                        api.Diagnostic kind) {
+      List<DiagnosticMessage> infos, api.Diagnostic kind) {
     _reportDiagnosticMessage(message, kind);
     for (DiagnosticMessage info in infos) {
       _reportDiagnosticMessage(info, api.Diagnostic.INFO);
     }
   }
 
-  void _reportDiagnosticMessage(DiagnosticMessage diagnosticMessage,
-                                api.Diagnostic kind) {
+  void _reportDiagnosticMessage(
+      DiagnosticMessage diagnosticMessage, api.Diagnostic kind) {
     // [:span.uri:] might be [:null:] in case of a [Script] with no [uri]. For
     // instance in the [Types] constructor in typechecker.dart.
     SourceSpan span = diagnosticMessage.sourceSpan;
     Message message = diagnosticMessage.message;
     if (span == null || span.uri == null) {
       callUserHandler(message, null, null, null, '$message', kind);
     } else {
       callUserHandler(
           message, span.uri, span.begin, span.end, '$message', kind);
     }
   }
 
   bool get isMockCompilation =>
       mockableLibraryUsed && options.allowMockCompilation;
 
   void callUserHandler(Message message, Uri uri, int begin, int end,
-                       String text, api.Diagnostic kind) {
+      String text, api.Diagnostic kind) {
     userHandlerTask.measure(() {
       handler.report(message, uri, begin, end, text, kind);
     });
   }
 
   Future callUserProvider(Uri uri) {
     return userProviderTask.measure(() => provider.readFromUri(uri));
   }
 
   Future<Packages> callUserPackagesDiscovery(Uri uri) {
-    return userPackagesDiscoveryTask.measure(
-        () => options.packagesDiscoveryProvider(uri));
+    return userPackagesDiscoveryTask
+        .measure(() => options.packagesDiscoveryProvider(uri));
   }
 
   Uri lookupLibraryUri(String libraryName) {
-    assert(invariant(NO_LOCATION_SPANNABLE,
-        sdkLibraries != null, message: "setupSdk() has not been run"));
+    assert(invariant(NO_LOCATION_SPANNABLE, sdkLibraries != null,
+        message: "setupSdk() has not been run"));
     return sdkLibraries[libraryName];
   }
 
   Uri resolvePatchUri(String libraryName) {
     return backend.resolvePatchUri(libraryName, options.platformConfigUri);
   }
 }
 
 class _Environment implements Environment {
   final Map<String, String> definitions;
 
   // TODO(sigmund): break the circularity here: Compiler needs an environment to
   // intialize the library loader, but the environment here needs to know about
   // how the sdk is set up and about whether the backend supports mirrors.
   CompilerImpl compiler;
 
   _Environment(this.definitions);
 
   String valueOf(String name) {
-    assert(invariant(NO_LOCATION_SPANNABLE,
-        compiler.sdkLibraries != null, message: "setupSdk() has not been run"));
+    assert(invariant(NO_LOCATION_SPANNABLE, compiler.sdkLibraries != null,
+        message: "setupSdk() has not been run"));
 
     var result = definitions[name];
     if (result != null || definitions.containsKey(name)) return result;
     if (!name.startsWith(_dartLibraryEnvironmentPrefix)) return null;
 
     String libraryName = name.substring(_dartLibraryEnvironmentPrefix.length);
 
     // Private libraries are not exposed to the users.
     if (libraryName.startsWith("_")) return null;
 
@@ skipping 10 matching lines @@
   }
 }
 
 /// For every 'dart:' library, a corresponding environment variable is set
 /// to "true". The environment variable's name is the concatenation of
 /// this prefix and the name (without the 'dart:'.
 ///
 /// For example 'dart:html' has the environment variable 'dart.library.html' set
 /// to "true".
 const String _dartLibraryEnvironmentPrefix = 'dart.library.';