bundles/org.eclipse.team.cvs.ui/src/org/eclipse/team/internal/ccvs/ui/actions/CompareWithRevisionAction.java

/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.actions;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.team.internal.ccvs.core.CVSException;
import org.eclipse.team.internal.ccvs.core.ICVSResource;
import org.eclipse.team.internal.ccvs.ui.*;
import org.eclipse.team.ui.TeamUI;
import org.eclipse.team.ui.history.HistoryPageSaveablePart;
import org.eclipse.team.ui.history.IHistoryPage;

/**
 * Compare with revision will allow a user to browse the history of a file, compare with the
 * other revisions and merge changes from other revisions into the workspace copy.
 */
public class CompareWithRevisionAction extends WorkspaceAction {

	
	/*
	 * @see CVSAction#execute(IAction)
	 */
	public void execute(IAction action) throws InvocationTargetException, InterruptedException {
					
		// Show the compare viewer
		run(new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InterruptedException, InvocationTargetException {
				
				if(CVSUIPlugin.getPlugin().getPreferenceStore().getBoolean(ICVSUIConstants.PREF_SHOW_COMPARE_REVISION_IN_DIALOG)) {
					IFile file = (IFile) getSelectedResources()[0];
					showCompareInDialog(getShell(), file);
				} else {
					IHistoryPage page = TeamUI.getHistoryView().showHistoryFor((IFile)getSelectedResources()[0]);
					if (page instanceof CVSHistoryPage){
						CVSHistoryPage cvsHistoryPage = (CVSHistoryPage) page;
						cvsHistoryPage.setClickAction(true);
					}
				}
			}
		}, false /* cancelable */, PROGRESS_BUSYCURSOR);
	}
	
	protected void showCompareInDialog(Shell shell, Object object){
		HistoryPageSaveablePart.showHistoryInDialog(shell, object);
	}
	
	/**
	 * Return the text describing this action
	 */
	protected String getActionTitle() {
		return CVSUIMessages.CompareWithRevisionAction_4; 
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.team.internal.ccvs.ui.actions.CVSAction#getErrorTitle()
	 */
	protected String getErrorTitle() {
		return CVSUIMessages.CompareWithRevisionAction_compare; 
	}

	/* (non-Javadoc)
	 * @see org.eclipse.team.internal.ccvs.ui.actions.WorkspaceAction#isEnabledForCVSResource(org.eclipse.team.internal.ccvs.core.ICVSResource)
	 */
	protected boolean isEnabledForCVSResource(ICVSResource cvsResource) throws CVSException {
		return (!cvsResource.isFolder() && super.isEnabledForCVSResource(cvsResource));
	}

	/* (non-Javadoc)
	 * @see org.eclipse.team.internal.ccvs.ui.actions.WorkspaceAction#isEnabledForMultipleResources()
	 */
	protected boolean isEnabledForMultipleResources() {
		return false;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.team.internal.ccvs.ui.actions.WorkspaceAction#isEnabledForAddedResources()
	 */
	protected boolean isEnabledForAddedResources() {
		return true;
	}
	
	protected boolean isEnabledForUnmanagedResources() {
		return true;
	}
	
	protected boolean isEnabledForIgnoredResources() {
		return true;
	}
}