more on *Impl sorting in completion

java/java-tests/testData/codeInsight/completion/style/after15.java

@@ -1,6 +1,6 @@
 class A{
 {
  String str;
- str.toCharArray();
+ str.toString();
  }
 }

java/java-tests/testData/codeInsight/completion/style/after17.java

@@ -1,7 +1,7 @@
 class A{
  {
   final String path = BASE_PATH;
-  path.toCharArray()<caret>;
+  path.toString()<caret>;
   sdkfjsdkhjfh();
  }
 }

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

@@ -229,4 +229,16 @@ class JavaAutoPopupTest extends CompletionAutoPopupTestCase {
 
   }
 
+  public void testPrefixLengthDependentSorting() {
+    myFixture.addClass("package foo; public class PsiJavaCodeReferenceElement {}")
+    myFixture.configureByText("a.java", """
+    class PsiJavaCodeReferenceElementImpl {
+      { <caret> }
+    }
+    """)
+    type 'PJCR'
+    assertOrderedEquals myFixture.lookupElementStrings, 'PsiJavaCodeReferenceElement', 'PsiJavaCodeReferenceElementImpl'
+
+  }
+
 }

java/testFramework/src/com/intellij/testFramework/fixtures/impl/JavaCodeInsightTestFixtureImpl.java

@@ -15,6 +15,8 @@
  */
 package com.intellij.testFramework.fixtures.impl;
 
+import com.intellij.openapi.application.Result;
+import com.intellij.openapi.command.WriteCommandAction;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
 import com.intellij.psi.search.ProjectScope;
@@ -49,12 +51,17 @@ public class JavaCodeInsightTestFixtureImpl extends CodeInsightTestFixtureImpl i
     return psiClass;
   }
 
-  private PsiClass addClass(@NonNls String rootPath, @NotNull @NonNls final String classText) throws IOException {
+  private PsiClass addClass(@NonNls final String rootPath, @NotNull @NonNls final String classText) throws IOException {
     final PsiClass aClass = ((PsiJavaFile)PsiFileFactory.getInstance(getProject()).createFileFromText("a.java", classText)).getClasses()[0];
     final String qName = aClass.getQualifiedName();
     assert qName != null;
 
-    final PsiFile psiFile = addFileToProject(rootPath, qName.replace('.', '/') + ".java", classText);
+    final PsiFile psiFile = new WriteCommandAction<PsiFile>(getProject()) {
+      @Override
+      protected void run(Result<PsiFile> result) throws Throwable {
+        result.setResult(addFileToProject(rootPath, qName.replace('.', '/') + ".java", classText));
+      }
+    }.execute().getResultObject();
     return ((PsiJavaFile)psiFile).getClasses()[0];
   }
 

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

@@ -35,8 +35,7 @@ public class PrefixMatchingWeigher extends CompletionWeigher {
     final String prefixHumps = StringUtil.capitalsOnly(prefix);
     final String itemHumps = StringUtil.capitalsOnly(lookupString);
 
-    if (itemHumps.equals(prefixHumps)) return 20;
-    if (itemHumps.startsWith(prefixHumps)) return 10;
+    if (itemHumps.startsWith(prefixHumps)) return 100 - itemHumps.length();
 
     if (lookupString.startsWith(prefix)) return 5;
     if (StringUtil.startsWithIgnoreCase(lookupString, prefix)) return 1;