platform/structure-view-impl/src/com/intellij/ide/util/treeView/smartTree/SmartTreeStructure.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.ide.util.treeView.smartTree;

import com.intellij.ide.util.treeView.AbstractTreeNode;
import com.intellij.ide.util.treeView.AbstractTreeStructure;
import com.intellij.ide.util.treeView.NodeDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import org.jetbrains.annotations.NotNull;

public class SmartTreeStructure extends AbstractTreeStructure {

  protected final TreeModel myModel;
  protected final Project myProject;
  private TreeElementWrapper myRootElementWrapper;

  public SmartTreeStructure(@NotNull Project project, @NotNull TreeModel model) {
    myModel = model;
    myProject = project;
  }

  @Override
  public void commit() {
    PsiDocumentManager.getInstance(myProject).commitAllDocuments();
  }

  @Override
  public boolean hasSomethingToCommit() {
    return PsiDocumentManager.getInstance(myProject).hasUncommitedDocuments();
  }

  @Override
  @NotNull
  public NodeDescriptor createDescriptor(Object element, NodeDescriptor parentDescriptor) {
    return (AbstractTreeNode)element;
  }

  @Override
  public Object[] getChildElements(Object element) {
    return ((AbstractTreeNode)element).getChildren().toArray();
  }

  @Override
  public Object getParentElement(Object element) {
    return ((AbstractTreeNode)element).getParent();
  }

  @Override
  public Object getRootElement() {
    if (myRootElementWrapper == null){
      myRootElementWrapper = createTree();
    }
    return myRootElementWrapper;
  }

  protected TreeElementWrapper createTree() {
    return new TreeElementWrapper(myProject, myModel.getRoot(), myModel);
  }

  @Override
  public boolean isAlwaysLeaf(Object element) {
    return ((AbstractTreeNode)element).isAlwaysLeaf();
  }

  public void rebuildTree() {
    ((CachingChildrenTreeNode)getRootElement()).rebuildChildren();
  }
}