platform/usageView/src/com/intellij/usages/UsageTarget.java

/*
 * Copyright 2000-2013 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 com.intellij.usages;

import com.intellij.navigation.NavigationItem;
import com.intellij.openapi.fileEditor.FileEditor;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author max
 */
public interface UsageTarget extends NavigationItem {
  UsageTarget[] EMPTY_ARRAY = new UsageTarget[0];
  /**
   * Should open usage view and look for usages
   */
  void findUsages();

  /**
   * Should look for usages in one specific editor. This typicaly shows other kind of dialog and doesn't
   * result in usage view display.
   */
  void findUsagesInEditor(@NotNull FileEditor editor);

  void highlightUsages(@NotNull PsiFile file, @NotNull Editor editor, boolean clearHighlights);

  boolean isValid();
  boolean isReadOnly();

  /**
   * @return the files this usage target is in. Might be null if usage target is not file-based
   */
  @Nullable
  VirtualFile[] getFiles();

  void update();
}