Add renames in output when using the mirror helper library.

sdk/lib/_internal/compiler/implementation/mirror_renamer/renamer.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.
 
 part of mirror_renamer;
 
 class MirrorRenamer {
-  static const String MIRROR_HELPER_CLASS = 'MirrorHelper';
-  static const String MIRROR_HELPER_GET_NAME_FUNCTION = 'getName';
-  static const String MIRROR_HELPER_LIBRARY_NAME = 'mirror_helper.dart';
-  static const String MIRROR_HELPER_LIBRARY_PREFIX = 'm';
-  static const String MIRROR_HELPER_CLASS_FULLY_QUALIFIED_NAME =
-      '$MIRROR_HELPER_LIBRARY_PREFIX.$MIRROR_HELPER_CLASS';
+  static const String MIRROR_HELPER_GET_NAME_FUNCTION = 'helperGetName';
+  static const String MIRROR_HELPER_LIBRARY_NAME = '_mirror_helper';
+  static const String MIRROR_HELPER_SYMBOLS_MAP_NAME = '_SYMBOLS';
 
-  static void handleStaticSend(Map<Node, String> renames, Element element,
-                               Send node, Compiler compiler) {
+  static Map<String, String> inverseRenames = new Map<String, String>();

[ahe, 2013/08/19 15:34:06]

Inverse of what?

[ahe, 2013/08/19 15:34:06]

No static state please.

[zarah, 2013/08/20 14:08:17]

Done.

[zarah, 2013/08/20 14:08:17]

Inverse of the renames. Changed the name to symbols, so that it is consistent
with the name in _mirror_helper.

+  static List<Node> mirrorSystemGetNameNodes = <Node>[];

[ahe, 2013/08/19 15:34:06]

Document.

[zarah, 2013/08/20 14:08:17]

Done.

+  static FunctionExpression mirrorHelperFunctionNode;

[ahe, 2013/08/19 15:34:06]

Name too general?

[zarah, 2013/08/20 14:08:17]

Done.

+
+  static void registerStaticSend(Element element, Send node,
+                                 Compiler compiler) {
   if (element == compiler.mirrorSystemGetNameFunction) {
-    renames[node.selector] = MIRROR_HELPER_GET_NAME_FUNCTION;
-    renames[node.receiver] = MIRROR_HELPER_CLASS_FULLY_QUALIFIED_NAME;
-    }
+    mirrorSystemGetNameNodes.add(node);
+  }
  }
 
-  static void addMirrorHelperImport(Map<LibraryElement, String> imports) {
-    Uri mirrorHelperUri = new Uri(path: MIRROR_HELPER_LIBRARY_NAME);
-    // TODO(zarah): Remove this hack! LibraryElementX should not be created
-    // outside the library loader. When actual mirror helper library
-    // is created, change to load that.
-    LibraryElement mirrorHelperLib = new LibraryElementX(
-        new Script(mirrorHelperUri, null));
-    imports.putIfAbsent(mirrorHelperLib, () => MIRROR_HELPER_LIBRARY_PREFIX);
+  static void registerHelperFunction(Element element, Node node,
+                                     Compiler compiler) {
+    if (element == compiler.mirrorHelperFunction) {
+      mirrorHelperFunctionNode = node;
+    }
   }
-}
+
+  static void addRenames(Map<Node, String> renames, List<Node> topLevelNodes,

[ahe, 2013/08/19 15:34:06]

Document.

[zarah, 2013/08/20 14:08:17]

Done.

+                         Compiler compiler) {
+    inverseRenames = new Map<String, String>();
+    String renameMapName;
+    FunctionElement getNameElement;
+
+    Node parse(String text) {
+      Token tokens = compiler.scanner.tokenize(text);
+      return compiler.parser.parseCompilationUnit(tokens);
+    }
+
+    //Add toplevel map containing all renames.

[ahe, 2013/08/19 15:34:06]

Add space after //.

[zarah, 2013/08/20 14:08:17]

Done.

+    for (Node node in renames.keys) {
+      if (node is Identifier) {

[ahe, 2013/08/19 15:34:06]

Identifier identifier = node.asIdentifier();
if (node != null) {
  var stringValue = identifier.source.stringValue;
}

[zarah, 2013/08/20 14:08:17]

Done.

+        var stringValue = node.asIdentifier().source.stringValue;
+        if (stringValue == MIRROR_HELPER_SYMBOLS_MAP_NAME) {

[ahe, 2013/08/19 15:34:06]

Accessing stringValue in general won't work. See ByteString in
scanner/byte_strings.dart. This should be written like this:

identifier.source == const SourceString('....')

[zarah, 2013/08/20 14:08:17]

Done.

+          renameMapName = renames[node];
+        } else if (stringValue != renames[node]) {

[ahe, 2013/08/19 15:34:06]

Could you put SourceStrings in the 'renames' map?

[zarah, 2013/08/20 14:08:17]

Not really, since it is used in renamePlaceHolders() for dynamically generated
names. However, the inverseRenames map (renamed to 'symbols') can be from String
to SourceString, thereby we save some conversions from SourceString to String,
but loose the small gain of avoiding entries in the map that correspond to
elements that have been 'renamed' to their original name.

+          inverseRenames.putIfAbsent(renames[node], () => stringValue);
+        }
+      }
+    }
+
+    StringBuffer sb = new StringBuffer('const Map<String, String> '
+        '$renameMapName = const<String, String>{');
+    bool first = true;
+    for (String mangledName in inverseRenames.keys) {
+      if (!first) {
+        sb.write(',');
+      } else {
+        first = false;
+      }
+      sb.write("'$mangledName' : '${inverseRenames[mangledName]}'");
+    }
+    sb.write('};');
+    topLevelNodes.add(parse(sb.toString()));
+
+    //Replace calls to Mirrorsystem.getName with calls to helper function.

[ahe, 2013/08/19 15:34:06]

Add space after //.

[zarah, 2013/08/20 14:08:17]

Done.

+    getNameElement = compiler.mirrorHelperLibrary.find(const
+         SourceString(MIRROR_HELPER_GET_NAME_FUNCTION));
+    Node getNameNode = getNameElement.parseNode(compiler);
+    mirrorSystemGetNameNodes.forEach((node) {
+      renames[node.selector] = renames[mirrorHelperFunctionNode.name];
+      renames[node.receiver] = '';
+    });
+  }
+}