intentions preview: create annotation method from usage

GitOrigin-RevId: 202cf795eba05296027ab41e034220a9c1a6b678

java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/CreateAnnotationMethodFromUsageFix.java

@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2011 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.codeInsight.daemon.impl.quickfix;
 
 import com.intellij.codeInsight.ExpectedTypeInfo;
@@ -20,6 +6,8 @@ import com.intellij.codeInsight.ExpectedTypesProvider;
 import com.intellij.codeInsight.TailType;
 import com.intellij.codeInsight.daemon.QuickFixBundle;
 import com.intellij.codeInsight.daemon.impl.analysis.AnnotationsHighlightUtil;
+import com.intellij.codeInsight.intention.preview.IntentionPreviewInfo;
+import com.intellij.ide.highlighter.JavaFileType;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
@@ -32,6 +20,9 @@ import com.intellij.util.containers.ContainerUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.List;
+import java.util.Objects;
+
 public class CreateAnnotationMethodFromUsageFix extends CreateFromUsageBaseFix {
   private static final Logger LOG = Logger.getInstance(CreateAnnotationMethodFromUsageFix.class);
 
@@ -65,6 +56,19 @@ public class CreateAnnotationMethodFromUsageFix extends CreateFromUsageBaseFix {
     chooseTargetClass(project, editor, this::invokeImpl);
   }
 
+  @Override
+  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file) {
+    PsiNameValuePair nameValuePair = getNameValuePair();
+    List<PsiClass> classes = filterTargetClasses(nameValuePair, project);
+    if (nameValuePair == null || classes.isEmpty()) return IntentionPreviewInfo.EMPTY;
+    final PsiType type = getAnnotationValueType(nameValuePair.getValue());
+    PsiClass targetClass = classes.get(0);
+    String methodName = Objects.requireNonNull(nameValuePair.getName());
+    return new IntentionPreviewInfo.CustomDiff(JavaFileType.INSTANCE, targetClass.getName(), 
+                                               "",
+                                               Objects.requireNonNull(type).getPresentableText() + " " + methodName + "()");
+  }
+
   private void invokeImpl(@NotNull PsiClass targetClass) {
     PsiNameValuePair nameValuePair = getNameValuePair();
     if (nameValuePair == null || isValidElement(nameValuePair)) return;

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createAnnotationMethodFromUsage/after1.java

@@ -1,4 +1,4 @@
-// "Create method 'test'" "true"
+// "Create method 'test'" "true-preview"
 public class Test {
     @Attr(test= "")
     public Test() {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createAnnotationMethodFromUsage/before1.java

@@ -1,4 +1,4 @@
-// "Create method 'test'" "true"
+// "Create method 'test'" "true-preview"
 public class Test {
     @Attr(te<caret>st= "")
     public Test() {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createAnnotationMethodFromUsage/preview1.java

@@ -0,0 +1 @@
+String test()