Add --enable-dart-mind option to poi.dart.

dart/site/try/poi/poi.dart

 // Copyright (c) 2014, 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 trydart.poi;
 
 import 'dart:async' show
     Completer,
     Future,
     Stream;
@@ skipping 46 matching lines @@
     DartType;
 
 import 'package:compiler/implementation/scanner/scannerlib.dart' show
     EOF_TOKEN,
     IDENTIFIER_TOKEN,
     KEYWORD_TOKEN,
     PartialClassElement,
     PartialElement,
     Token;
 
-/// Controls if this program should be querying Dart Mind. Used by tests.
-bool enableDartMind = true;
+/// Enabled by the option --enable-dart-mind.  Controls if this program should
+/// be querying Dart Mind.
+bool isDartMindEnabled = false;
 
 /// Iterator over lines from standard input (or the argument array).
 Iterator<String> stdin;
 
 /// Enabled by the option --simulate-mutation. When true, this program will
 /// only prompt for one file name, and subsequent runs will read
 /// FILENAME.N.dart, where N starts at 1, and is increased on each iteration.
 /// For example, if the program is invoked as:
 ///
 ///   dart poi.dart --simulate-mutation test.dart 11 22 33 44
@@ skipping 35 matching lines @@
 
 main(List<String> arguments) {
   poiCount = 0;
   List<String> nonOptionArguments = [];
   for (String argument in arguments) {
     if (argument.startsWith('-')) {
       switch (argument) {
         case '--simulate-mutation':
           isSimulateMutationEnabled = true;
           break;
+        case '--enable-dart-mind':
+          isDartMindEnabled = true;
+          break;
         case '-v':
         case '--verbose':
           isVerbose = true;
           break;
         default:
           throw 'Unknown option: $argument.';
       }
     } else {
       nonOptionArguments.add(argument);
     }
@@ skipping 61 matching lines @@
     stdout.write(message);
   }
   return stdout.flush().then((_) {
     stdin.moveNext();
     return stdin.current;
   });
 }
 
 Future queryDartMind(String prefix, String info) {
   // TODO(lukechurch): Use [info] for something.
-  if (!enableDartMind) return new Future.value("[]");
   String encodedArg0 = Uri.encodeComponent('"$prefix"');
   String mindQuery =
       'http://dart-mind.appspot.com/rpc'
       '?action=GetExportingPubCompletions'
       '&arg0=$encodedArg0';
   Uri uri = Uri.parse(mindQuery);
 
   HttpClient client = new HttpClient();
   return client.getUrl(uri).then((HttpClientRequest request) {
     return request.close();
@@ skipping 50 matching lines @@
     String prefix;
     if (token != null) {
       if (token.charOffset + token.charCount <= position) {
         // After the token; in whitespace, or in the beginning of another token.
         prefix = "";
       } else if (token.kind == IDENTIFIER_TOKEN ||
                  token.kind == KEYWORD_TOKEN) {
         prefix = token.value.substring(0, position - token.charOffset);
       }
     }
+    sw.stop();
     printVerbose('Find token took ${sw.elapsedMicroseconds}us.');
-    sw.reset();
-    if (prefix != null) {
+    if (isDartMindEnabled && prefix != null) {
+      sw..reset()..start();
       return queryDartMind(prefix, info).then((String dartMindSuggestion) {
         sw.stop();
         print('Dart Mind ($prefix): $dartMindSuggestion.');
         printVerbose('Dart Mind took ${sw.elapsedMicroseconds}us.');
         return repeat();
       });
     } else {
-      print("Didn't talk to Dart Mind, no identifier at POI ($token).");
+      if (isDartMindEnabled) {
+        print("Didn't talk to Dart Mind, no identifier at POI ($token).");
+      }
       return repeat();
     }
   });
 }
 
 /// Find the token corresponding to [position] in [element].  The method only
 /// works for instances of [PartialElement] or [LibraryElement].  Support for
 /// [LibraryElement] is currently limited, and works only for named libraries.
 Token findToken(Element element, int position) {
   Token beginToken;
@@ skipping 363 matching lines @@
     buffer.write('\n');
     indented.write('}');
   }
 }
 
 modelx.ScopeX localScope(modelx.LibraryElementX element) => element.localScope;
 
 modelx.ImportScope importScope(modelx.LibraryElementX element) {
   return element.importScope;
 }