platform/platform-impl/src/com/intellij/openapi/fileTypes/impl/ApproveRemovedMappingsActivity.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.openapi.fileTypes.impl;

import com.intellij.notification.Notification;
import com.intellij.notification.NotificationListener;
import com.intellij.notification.NotificationType;
import com.intellij.notification.Notifications;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.fileTypes.FileNameMatcher;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.FileTypeManager;
import com.intellij.openapi.fileTypes.PlainTextFileType;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.startup.StartupActivity;
import com.intellij.openapi.util.Pair;
import com.intellij.util.ui.UIUtil;
import org.jetbrains.annotations.NotNull;

import javax.swing.event.HyperlinkEvent;
import java.util.Iterator;
import java.util.Map;

/**
 * @author Dmitry Avdeev
 *         Date: 3/11/13
 */
public class ApproveRemovedMappingsActivity implements StartupActivity {
  @Override
  public void runActivity(@NotNull final Project project) {
    final Map<FileNameMatcher,Pair<FileType,Boolean>> map = ((FileTypeManagerImpl)FileTypeManager.getInstance()).getRemovedMappings();
    if (!map.isEmpty()) {
      UIUtil.invokeAndWaitIfNeeded(new Runnable() {
        @Override
        public void run() {
          for (Iterator<Map.Entry<FileNameMatcher, Pair<FileType, Boolean>>> iterator = map.entrySet().iterator(); iterator.hasNext(); ) {
            Map.Entry<FileNameMatcher, Pair<FileType, Boolean>> entry = iterator.next();
            if (entry.getValue().getSecond()) {
              continue;
            }
            final FileNameMatcher matcher = entry.getKey();
            final FileType fileType = entry.getValue().getFirst();
            Notification notification = new Notification("File type recognized", "File type recognized",
                                                         "File extension " + matcher.getPresentableString() +
                                                         " was reassigned to " + fileType.getName() + " <a href='revert'>Revert</a>",
                                                         NotificationType.WARNING, new NotificationListener.Adapter() {
              @Override
              protected void hyperlinkActivated(@NotNull Notification notification, @NotNull HyperlinkEvent e) {
                ApplicationManager.getApplication().runWriteAction(new Runnable() {
                  public void run() {
                    FileTypeManager.getInstance().associate(PlainTextFileType.INSTANCE, matcher);
                    map.put(matcher, Pair.create(fileType, true));
                  }
                });
                notification.expire();
              }
            });
            Notifications.Bus.notify(notification, project);
            ApplicationManager.getApplication().runWriteAction(new Runnable() {
              public void run() {
                FileTypeManager.getInstance().associate(fileType, matcher);
              }
            });
            iterator.remove();
          }
        }
      });
    }
  }
}