Code completion improvements.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/text/dart/CompletionProposalCollector.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/text/dart/CompletionProposalCollector.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/text/dart/CompletionProposalCollector.java	(revision 7347)
+++ editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/text/dart/CompletionProposalCollector.java	(working copy)
@@ -353,8 +353,8 @@
   protected int computeRelevance(CompletionProposal proposal) {
     final int baseRelevance = proposal.getRelevance() * 16;
     switch (proposal.getKind()) {
-//      case CompletionProposal.PACKAGE_REF:
-//        return baseRelevance + 0;
+      case CompletionProposal.LIBRARY_PREFIX:
+        return baseRelevance + 0;
       case CompletionProposal.LABEL_REF:
         return baseRelevance + 1;
       case CompletionProposal.KEYWORD:
@@ -406,8 +406,8 @@
     switch (proposal.getKind()) {
       case CompletionProposal.KEYWORD:
         return createKeywordProposal(proposal);
-//      case CompletionProposal.PACKAGE_REF:
-//        return createPackageProposal(proposal);
+      case CompletionProposal.LIBRARY_PREFIX:
+        return createLibraryPrefixProposal(proposal);
       case CompletionProposal.TYPE_REF:
         return createTypeProposal(proposal);
 //      case CompletionProposal.JAVADOC_TYPE_REF:
@@ -522,8 +522,8 @@
 //          return "java.lang.Object".toCharArray(); //$NON-NLS-1$
 //        }
         return Signature.toCharArray(declaration);
-//      case CompletionProposal.PACKAGE_REF:
-//        return proposal.getDeclarationSignature();
+      case CompletionProposal.LIBRARY_PREFIX:
+        return proposal.getDeclarationSignature();
 //      case CompletionProposal.JAVADOC_TYPE_REF:
       case CompletionProposal.TYPE_REF:
         return Signature.toCharArray(proposal.getSignature());
@@ -842,17 +842,17 @@
     return proposal;
   }
 
-//  private IDartCompletionProposal createPackageProposal(CompletionProposal proposal) {
-//    String completion = String.valueOf(proposal.getCompletion());
-//    int start = proposal.getReplaceStart();
-//    int length = getLength(proposal);
-//    StyledString label = new StyledString(fLabelProvider.createSimpleLabel(proposal));//TODO(messick)
-//    Image image = getImage(fLabelProvider.createPackageImageDescriptor(proposal));
-//    int relevance = computeRelevance(proposal);
-//
-//    return new DartCompletionProposal(completion, start, length, image, label, relevance);
-//  }
+  private IDartCompletionProposal createLibraryPrefixProposal(CompletionProposal proposal) {
+    String completion = String.valueOf(proposal.getCompletion());
+    int start = proposal.getReplaceStart();
+    int length = getLength(proposal);
+    StyledString label = new StyledString(fLabelProvider.createSimpleLabel(proposal));//TODO(messick)
+    Image image = getImage(fLabelProvider.createLibraryImageDescriptor(proposal));
+    int relevance = computeRelevance(proposal);
 
+    return new DartCompletionProposal(completion, start, length, image, label, relevance);
+  }
+
   private IDartCompletionProposal createTypeProposal(CompletionProposal typeProposal) {
     LazyDartCompletionProposal proposal = new LazyDartTypeCompletionProposal(typeProposal,
         getInvocationContext());