don't get in the way when typing a label name in java/groovy

java/java-impl/src/com/intellij/codeInsight/completion/JavaCharFilter.java

@@ -105,6 +105,17 @@ public class JavaCharFilter extends CharFilter {
     }
     if (c == '.' && isWithinLiteral(lookup)) return Result.ADD_TO_PREFIX;
 
+    if (c == ':') {
+      PsiFile file = lookup.getPsiFile();
+      PsiDocumentManager.getInstance(file.getProject()).commitDocument(lookup.getEditor().getDocument());
+      PsiElement element = lookup.getPsiElement();
+      if (PsiTreeUtil.getParentOfType(element, PsiSwitchLabelStatement.class) != null ||
+          PsiTreeUtil.getParentOfType(element, PsiConditionalExpression.class) != null) {
+        return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
+      }
+      return Result.HIDE_LOOKUP;
+    }
+
     if ((c == '[' || c == '<' || c == '.' || c == ' ' || c == '(') && isNonImportedClassEntered((LookupImpl)lookup)) {
       return Result.HIDE_LOOKUP;
     }

java/java-tests/testSrc/com/intellij/codeInsight/completion/JavaAutoPopupTest.groovy

@@ -532,7 +532,7 @@ public interface Test {
     }
     edt { myFixture.type '\t' }
     myFixture.checkResult 'public interface Test { RuntimeException<caret>x }'
-  }
+ }
 
   private def registerContributor(final Class contributor, LoadingOrder order = LoadingOrder.LAST) {
     def ep = Extensions.rootArea.getExtensionPoint("com.intellij.completion.contributor")
@@ -1194,5 +1194,13 @@ class Foo {{
     assert 'io' in myFixture.lookupElementStrings
   }
 
+  public void testEnteringLabel() {
+    myFixture.configureByText 'a.java', '''class Foo {{
+  <caret>
+}}
+'''
+    type 'FIS:'
+    assert myFixture.file.text.contains('FIS:')
+  }
 
 }

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/completion/GroovyReferenceCharFilter.java

@@ -20,10 +20,14 @@ import com.intellij.codeInsight.lookup.CharFilter;
 import com.intellij.codeInsight.lookup.Lookup;
 import com.intellij.codeInsight.lookup.LookupElement;
 import com.intellij.codeInsight.lookup.impl.LookupImpl;
-import com.intellij.psi.PsiClass;
-import com.intellij.psi.PsiFile;
+import com.intellij.psi.*;
+import com.intellij.psi.util.PsiTreeUtil;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.plugins.groovy.GroovyFileType;
+import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.GrListOrMap;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrArgumentList;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.clauses.GrCaseLabel;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrConditionalExpression;
 
 /**
  * @author ilyas
@@ -51,6 +55,21 @@ public class GroovyReferenceCharFilter extends CharFilter {
       return Result.HIDE_LOOKUP;
     }
 
+    if (c == ':') {
+      PsiFile file = lookup.getPsiFile();
+      PsiDocumentManager.getInstance(file.getProject()).commitDocument(lookup.getEditor().getDocument());
+      PsiElement element = lookup.getPsiElement();
+      if (PsiTreeUtil.getParentOfType(element, GrCaseLabel.class) != null ||
+          PsiTreeUtil.getParentOfType(element, GrConditionalExpression.class) != null ||
+          PsiTreeUtil.getParentOfType(element, GrArgumentList.class) != null ||
+          PsiTreeUtil.getParentOfType(element, GrListOrMap.class) != null
+        ) {
+        return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
+      }
+      return Result.HIDE_LOOKUP;
+    }
+
+
     if (c == '[') return CharFilter.Result.SELECT_ITEM_AND_FINISH_LOOKUP;
     if (c == '<' && item.getObject() instanceof PsiClass) return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
 

plugins/groovy/test/org/jetbrains/plugins/groovy/completion/GroovyAutoPopupTest.groovy

@@ -226,4 +226,10 @@ class GroovyAutoPopupTest extends CompletionAutoPopupTestCase {
     assert myFixture.lookupElementStrings == ['PrimaBalerina']
   }
 
+  public void testEnteringLabel() {
+    myFixture.configureByText 'a.groovy', '<caret>'
+    type 'FIS:'
+    assert myFixture.file.text == 'FIS:'
+  }
+
 }