platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ui/AdditionalLocalChangeActionsInstaller.java

/*
 * Copyright 2000-2009 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.vcs.changes.ui;

import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vcs.AbstractVcs;
import com.intellij.openapi.vcs.ProjectLevelVcsManager;
import com.intellij.openapi.vcs.changes.Change;
import org.jetbrains.annotations.Nullable;

import java.util.*;

public class AdditionalLocalChangeActionsInstaller {
  @Nullable
  public static List<AnAction> calculateActions(final Project project, final Collection<Change> changes) {
    final ProjectLevelVcsManager plVcsManager = ProjectLevelVcsManager.getInstance(project);
    final Map<String, AbstractVcs> map = new HashMap<String, AbstractVcs>();
    for (Change change : changes) {
      if (change.getAfterRevision() != null) {
        final AbstractVcs vcs = plVcsManager.getVcsFor(change.getAfterRevision().getFile());
        if ((vcs != null) && (! map.containsKey(vcs.getName()))) {
          map.put(vcs.getName(), vcs);
        }
      }
    }
    if (map.isEmpty()) {
      return null;
    }
    final List<AnAction> result = new ArrayList<AnAction>(1);
    for (AbstractVcs vcs : map.values()) {
      final List<AnAction> actions = vcs.getAdditionalActionsForLocalChange();
      if (actions != null) {
        result.addAll(actions);
      }
    }
    return result;
  }
}