platform/dvcs-impl/src/com/intellij/dvcs/push/ui/PushLogTreeUtil.java

/*
 * Copyright 2000-2014 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.dvcs.push.ui;

import com.intellij.ui.CheckboxTree;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import java.awt.*;
import java.awt.event.MouseEvent;

public class PushLogTreeUtil {

  @Nullable
  public static Object getTagAtForRenderer(CheckboxTree.CheckboxTreeCellRenderer renderer, MouseEvent e) {
    JTree tree = (JTree)e.getSource();
    Object tag = null;
    final TreePath path = tree.getPathForLocation(e.getX(), e.getY());
    if (path != null) {
      final Rectangle rectangle = tree.getPathBounds(path);
      assert rectangle != null;
      int dx = e.getX() - rectangle.x;
      final TreeNode treeNode = (TreeNode)path.getLastPathComponent();
      final int row = tree.getRowForLocation(e.getX(), e.getY());
      tree.getCellRenderer().getTreeCellRendererComponent(tree, treeNode, false, false, true, row, true);
      if (treeNode instanceof RepositoryNode) {
        RepositoryNode repositoryNode = (RepositoryNode)treeNode;
        int checkBoxWidth = repositoryNode.isCheckboxVisible() ? renderer.getCheckbox().getWidth() : 0;
        tag = renderer.getTextRenderer().getFragmentTagAt(dx - checkBoxWidth);
      }
      else {
        tag = renderer.getTextRenderer().getFragmentTagAt(dx);
      }
    }
    return tag;
  }
}