platform/vcs-impl/src/com/intellij/openapi/vcs/changes/local/EditComment.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.local;

import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.vcs.changes.ChangeListListener;
import com.intellij.openapi.vcs.changes.ChangeListWorker;
import com.intellij.openapi.vcs.changes.LocalChangeList;
import com.intellij.util.EventDispatcher;

public class EditComment implements ChangeListCommand {
  private final String myName;
  private final String myNewComment;
  private String myOldComment;
  private LocalChangeList myListCopy;

  public EditComment(final String name, final String newComment) {
    myNewComment = newComment;
    myName = name;
  }

  public void apply(final ChangeListWorker worker) {
    myListCopy = worker.getCopyByName(myName);
    if (myListCopy != null) {
      myOldComment = worker.editComment(myName, myNewComment);
      if (Comparing.equal(myOldComment, myNewComment)) {
        myListCopy = null;  // nothing changed, no notify
      }
    }
  }

  public void doNotify(final EventDispatcher<ChangeListListener> dispatcher) {
    if (myListCopy != null) {
      dispatcher.getMulticaster().changeListCommentChanged(myListCopy, myOldComment);
    }
  }

  public String getOldComment() {
    return myOldComment;
  }
}