KT-2128 Code completion after number with dot - don't complete on '.' only in ".."

#KT-2128 Fixed

idea/src/org/jetbrains/jet/plugin/completion/JetReferenceCharFilter.java

@@ -16,7 +16,6 @@
 
 package org.jetbrains.jet.plugin.completion;
 
-import com.intellij.codeInsight.completion.CompletionCharFilter;
 import com.intellij.codeInsight.lookup.CharFilter;
 import com.intellij.codeInsight.lookup.Lookup;
 import com.intellij.psi.PsiFile;
@@ -24,8 +23,6 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.psi.JetFile;
 
 public class JetReferenceCharFilter extends CharFilter {
-    private final static CharFilter delegate = new CompletionCharFilter();
-
     @Override
     @Nullable
     public Result acceptChar(char c, int prefixLength, Lookup lookup) {
@@ -34,10 +31,13 @@ public class JetReferenceCharFilter extends CharFilter {
             return null;
         }
 
-        if (c == '.') {
-            return Result.HIDE_LOOKUP;
+        if (c == '.' && prefixLength == 0 && !lookup.isSelectionTouched()) {
+            int caret = lookup.getEditor().getCaretModel().getOffset();
+            if (caret > 0 && lookup.getEditor().getDocument().getCharsSequence().charAt(caret - 1) == '.') {
+                return Result.HIDE_LOOKUP;
+            }
         }
 
-        return delegate.acceptChar(c, prefixLength, lookup);
+        return null;
     }
 }

idea/testData/completion/confidence/CompleteOnDotOutOfRanges.kt

@@ -0,0 +1,3 @@
+fun test() {
+  12.in<caret>
+}

idea/testData/completion/confidence/CompleteOnDotOutOfRanges.kt.after

@@ -0,0 +1,3 @@
+fun test() {
+  12.inc(). <caret>
+}

idea/testData/completion/confidence/NoAutoCompletionForRangeOperator.kt

@@ -0,0 +1,4 @@
+fun test() {
+    for (i in 12.<caret>) {
+    }
+}

idea/testData/completion/confidence/NoAutoCompletionForRangeOperator.kt.after

@@ -0,0 +1,4 @@
+fun test() {
+    for (i in 12.. ) {
+    }
+}

idea/tests/org/jetbrains/jet/completion/confidence/JetConfidenceTest.java

@@ -30,6 +30,9 @@ import java.io.File;
  * @author Nikolay Krasko
  */
 public class JetConfidenceTest extends LightCompletionTestCase {
+    public void testCompleteOnDotOutOfRanges() {
+        doTest(".");
+    }
 
     public void testImportAsConfidence() {
         doTest("as");
@@ -51,6 +54,10 @@ public class JetConfidenceTest extends LightCompletionTestCase {
         doTest("mm");
     }
 
+    public void testNoAutoCompletionForRangeOperator() {
+        doTest(".");
+    }
+
     protected void doTest(String completionActivateType) {
         configureByFile(getBeforeFileName());
         type(completionActivateType + " ");