fix popup caption to not expand popup for wild titles + fix ClassPresentationUtil to return correct presentation for anonymous classes

java/java-impl/src/com/intellij/psi/presentation/java/ClassPresentationUtil.java

@@ -79,8 +79,8 @@ public class ClassPresentationUtil {
     }
   }
 
+  @NotNull
   public static ItemPresentation getPresentation(@NotNull final PsiClass psiClass) {
-    if (psiClass instanceof PsiAnonymousClass) return null;
     return new ItemPresentation() {
       public String getPresentableText() {
         return getNameForClass(psiClass, false);

platform/util/src/com/intellij/ui/TitlePanel.java

@@ -64,10 +64,23 @@ public class TitlePanel extends CaptionPanel {
     myLabel.setText(titleText);
   }
 
+  @Override
+  public Dimension getMinimumSize() {
+    return new Dimension(10, getPreferredSize().height);
+  }
 
   public Dimension getPreferredSize() {
     final String text = myLabel.getText();
-    return text != null && text.trim().length() > 0 ? super.getPreferredSize() : new Dimension(0, 0);
+    if (text == null || text.trim().length() == 0) {
+      return new Dimension(0, 0);
+    }
+
+    final Dimension preferredSize = super.getPreferredSize();
+    if (preferredSize.width > 100) { // do not allow caption to extend parent container
+      return new Dimension(100, preferredSize.height);
+    }
+    
+    return preferredSize;
   }
 }