/*
 * Copyright 2013-2015 Sergey Ignatov, Alexander Zolotov, Florin Patan
 *
 * 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.goide.tree;

import com.goide.psi.GoNamedElement;
import com.intellij.ide.util.treeView.smartTree.ActionPresentation;
import com.intellij.ide.util.treeView.smartTree.ActionPresentationData;
import com.intellij.ide.util.treeView.smartTree.Filter;
import com.intellij.ide.util.treeView.smartTree.TreeElement;
import com.intellij.psi.PsiElement;
import com.intellij.util.PlatformIcons;
import org.jetbrains.annotations.NotNull;

public class GoPrivateMembersFilter implements Filter {
  private final static String PRIVATE_MEMBERS_FILTER_TEXT = "Show Private Members";

  @Override
  public boolean isVisible(TreeElement treeNode) {
    if (treeNode instanceof GoStructureViewFactory.Element) {
      PsiElement psiElement = ((GoStructureViewFactory.Element)treeNode).getValue();
      return !(psiElement instanceof GoNamedElement) || ((GoNamedElement)psiElement).isPublic();
    }
    return true;
  }

  @Override
  public boolean isReverted() {
    return true;
  }

  @NotNull
  @Override
  public ActionPresentation getPresentation() {
    return new ActionPresentationData(PRIVATE_MEMBERS_FILTER_TEXT, null, PlatformIcons.PRIVATE_ICON);
  }

  @NotNull
  @Override
  public String getName() {
    return PRIVATE_MEMBERS_FILTER_TEXT;
  }
}