apply start-matching case-insensitively whatever the completion matching option is

java/java-tests/testData/codeInsight/completion/normalSorting/EnumConstantStartMatching.java

@@ -0,0 +1,12 @@
+public class Foo {
+  
+  Zoo foo() {
+    return r<caret>
+  }
+
+  void rMethod() {}
+}
+
+enum Zoo {
+  LEFT, RIGHT
+}

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

@@ -98,11 +98,11 @@ public class NormalCompletionOrderingTest extends CompletionSortingTestCase {
   }
 
   public void testDispreferDeclared() throws Throwable {
-    checkPreferredItems(0, "aabbb", "aaa");
+    checkPreferredItems(0, "aabbb", "Aaaaaaa", "aaa");
   }
 
   public void testDispreferDeclaredOfExpectedType() throws Throwable {
-    checkPreferredItems(0, "aabbb", "aaa");
+    checkPreferredItems(0, "aabbb", "Aaaaaaa", "aaa");
   }
 
   public void testDispreferImpls() throws Throwable {
@@ -596,4 +596,12 @@ import java.lang.annotation.Target;
     assertPreferredItems 0, 'setText', 'setOurText'
   }
 
+  public void testEnumConstantStartMatching() {
+    checkPreferredItems(0, 'rMethod', 'Zoo.RIGHT')
+    myFixture.type('i\n;\nreturn r')
+    myFixture.completeBasic()
+    assertPreferredItems 0, 'Zoo.RIGHT', 'rMethod'
+
+  }
+
 }

platform/lang-impl/src/com/intellij/codeInsight/completion/impl/CamelHumpMatcher.java

@@ -43,12 +43,6 @@ public class CamelHumpMatcher extends PrefixMatcher {
 
   @Override
   public boolean isStartMatch(LookupElement element) {
-    if (super.isStartMatch(element)) {
-      return true;
-    }
-    if (element.isCaseSensitive()) {
-      return false;
-    }
     return ContainerUtil.or(element.getAllLookupStrings(), new Condition<String>() {
       @Override
       public boolean value(String s) {