java/java-impl/src/com/intellij/codeInsight/generation/surroundWith/JavaExpressionSurroundDescriptor.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.codeInsight.generation.surroundWith;
  17
  18 import com.intellij.codeInsight.CodeInsightUtil;
  19 import com.intellij.featureStatistics.FeatureUsageTracker;
  20 import com.intellij.lang.surroundWith.SurroundDescriptor;
  21 import com.intellij.lang.surroundWith.Surrounder;
  22 import com.intellij.openapi.extensions.Extensions;
  23 import com.intellij.psi.PsiElement;
  24 import com.intellij.psi.PsiExpression;
  25 import com.intellij.psi.PsiFile;
  26 import org.jetbrains.annotations.NotNull;
  27
  28 import java.util.ArrayList;
  29 import java.util.Collections;
  30
  31 /**
  32  * @author ven
  33  */
  34 public class JavaExpressionSurroundDescriptor implements SurroundDescriptor {
  35   private Surrounder[] mySurrounders = null;
  36
  37   private static final Surrounder[] SURROUNDERS = {
  38     new JavaWithParenthesesSurrounder(),
  39       new JavaWithCastSurrounder(),
  40       new JavaWithNotSurrounder(),
  41       new JavaWithNotInstanceofSurrounder(),
  42       new JavaWithIfExpressionSurrounder(),
  43       new JavaWithIfElseExpressionSurrounder()
  44   };
  45
  46   @NotNull public PsiElement[] getElementsToSurround(PsiFile file, int startOffset, int endOffset) {
  47     final PsiExpression expr = CodeInsightUtil.findExpressionInRange(file, startOffset, endOffset);
  48     if (expr == null) return PsiElement.EMPTY_ARRAY;
  49     FeatureUsageTracker.getInstance().triggerFeatureUsed("codeassists.surroundwith.expression");
  50     return new PsiElement[] {expr};
  51   }
  52
  53   @NotNull public Surrounder[] getSurrounders() {
  54     if (mySurrounders == null) {
  55       final ArrayList<Surrounder> list = new ArrayList<Surrounder>();
  56       Collections.addAll(list, SURROUNDERS);
  57       Collections.addAll(list, Extensions.getExtensions(JavaExpressionSurrounder.EP_NAME));
  58       mySurrounders = list.toArray(new Surrounder[list.size()]);
  59     }
  60     return mySurrounders;
  61   }
  62 }