plugins/groovy/src/org/jetbrains/plugins/groovy/findUsages/GrHighlightHandlerFactory.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

/*
 * Copyright 2000-2012 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.
 */
package org.jetbrains.plugins.groovy.findUsages;

import com.intellij.codeInsight.TargetElementUtilBase;
import com.intellij.codeInsight.highlighting.HighlightUsagesHandlerBase;
import com.intellij.codeInsight.highlighting.HighlightUsagesHandlerFactory;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.tree.IElementType;
import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrReferenceList;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinition;

/**
 * @author Max Medvedev
 */
public class GrHighlightHandlerFactory implements HighlightUsagesHandlerFactory {
  @Override
  public HighlightUsagesHandlerBase createHighlightUsagesHandler(Editor editor, PsiFile file) {
    int offset = TargetElementUtilBase.adjustOffset(file, editor.getDocument(), editor.getCaretModel().getOffset());
    final PsiElement target = file.findElementAt(offset);
    if (target == null) return null;

    ASTNode node = target.getNode();
    if (node == null) return null;

    IElementType type = node.getElementType();
    if (type == GroovyTokenTypes.kIMPLEMENTS || type == GroovyTokenTypes.kEXTENDS) {
      PsiElement parent = target.getParent();
      if (!(parent instanceof GrReferenceList)) return null;
      PsiElement grand = parent.getParent();
      if (!(grand instanceof GrTypeDefinition)) return null;
      return new GrHighlightOverridingMethodsHandler(editor, file, target, (GrTypeDefinition)grand);
    }
    else if (type == GroovyTokenTypes.kRETURN || type == GroovyTokenTypes.kTHROW) {
      return new GrHighlightExitPointHandler(editor, file, target);
    }
    return null;
  }
}