/*
 * 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.
 */

/*
 * Created by IntelliJ IDEA.
 * User: cdr
 * Date: Sep 26, 2007
 * Time: 1:56:28 PM
 */
package com.intellij.openapi.progress.util;

import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.StandardProgressIndicator;
import com.intellij.openapi.progress.WrappedProgressIndicator;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class ProgressWrapper extends AbstractProgressIndicatorBase implements WrappedProgressIndicator, StandardProgressIndicator {
  private final ProgressIndicator myOriginal;
  private final boolean myCheckCanceledForMe;

  protected ProgressWrapper(@NotNull ProgressIndicator original) {
    this(original, false);
  }

  protected ProgressWrapper(@NotNull ProgressIndicator original, boolean checkCanceledForMe) {
    myOriginal = original;
    myCheckCanceledForMe = checkCanceledForMe;
  }


  @Override
  public final void cancel() {
    super.cancel();
  }


  @Override
  public final boolean isCanceled() {
    return myOriginal.isCanceled() || myCheckCanceledForMe && super.isCanceled();
  }

  @Override
  public final void checkCanceled() {
    myOriginal.checkCanceled();
    super.checkCanceled();
  }

  @Override
  @NotNull
  public ProgressIndicator getOriginalProgressIndicator() {
    return myOriginal;
  }

  @Contract(value = "null -> null; !null -> !null", pure = true)
  public static ProgressWrapper wrap(@Nullable ProgressIndicator indicator) {
    return indicator == null || indicator instanceof ProgressWrapper ? (ProgressWrapper)indicator : new ProgressWrapper(indicator);
  }

  @Contract(value = "null -> null; !null -> !null", pure = true)
  public static ProgressIndicator unwrap(ProgressIndicator indicator) {
    return indicator instanceof ProgressWrapper ?
           ((ProgressWrapper)indicator).getOriginalProgressIndicator() : indicator;
  }
}