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

/*******************************************************************************
 * Copyright (c) 2000, 2002 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v0.5
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v05.html
 * 
 * Contributors:
 * IBM - Initial implementation
 ******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.actions;
 
import java.lang.reflect.InvocationTargetException;

import org.eclipse.compare.CompareUI;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.team.core.RepositoryProvider;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.CVSException;
import org.eclipse.team.internal.ccvs.core.CVSProviderPlugin;
import org.eclipse.team.internal.ccvs.core.CVSTag;
import org.eclipse.team.internal.ccvs.core.ICVSFile;
import org.eclipse.team.internal.ccvs.core.ICVSFolder;
import org.eclipse.team.internal.ccvs.core.ICVSResource;
import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot;
import org.eclipse.team.internal.ccvs.core.syncinfo.FolderSyncInfo;
import org.eclipse.team.internal.ccvs.core.syncinfo.ResourceSyncInfo;
import org.eclipse.team.internal.ccvs.ui.CVSLocalCompareEditorInput;
import org.eclipse.team.internal.ccvs.ui.Policy;

public class CompareWithRemoteAction extends WorkspaceAction {

	public void execute(IAction action) throws InvocationTargetException, InterruptedException {
		final IResource[] resources = getSelectedResources();
		final CVSTag[] tags = new CVSTag[resources.length];
		try {
			for (int i = 0; i < resources.length; i++) {
				tags[i] = getTag(resources[i]);
			}
		} catch(CVSException e) {
			throw new InvocationTargetException(e);
		}	
		
		// Show the compare viewer
		run(new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				CompareUI.openCompareEditor(new CVSLocalCompareEditorInput(resources, tags));
			}
		}, false /* cancelable */, this.PROGRESS_BUSYCURSOR);		
	}
	
	protected CVSTag getTag(IResource resource) throws CVSException {
		ICVSResource cvsResource = CVSWorkspaceRoot.getCVSResourceFor(resource);
		CVSTag tag = null;
		if (cvsResource.isFolder()) {
			FolderSyncInfo folderInfo = ((ICVSFolder)cvsResource).getFolderSyncInfo();
			if (folderInfo!=null) {
				tag = folderInfo.getTag();
				if(tag == null) {
					tag = CVSTag.DEFAULT;
				}
			} 
		} else {
			ResourceSyncInfo info = cvsResource.getSyncInfo();
			if (info != null) {					
				tag = info.getTag();
			}
		}
		if (tag==null) {
			if (cvsResource.getParent().isCVSFolder()) {
				tag = cvsResource.getParent().getFolderSyncInfo().getTag();
				if(tag == null) {
					tag = CVSTag.DEFAULT;
				}
			}
		}
		return tag;
	}
	
	protected boolean isEnabled() throws TeamException {
		IResource[] resources = getSelectedResources();
		if(resources.length>0) {
			for (int i = 0; i < resources.length; i++) {
				IResource resource = resources[i];
				if(RepositoryProvider.getProvider(resource.getProject(), CVSProviderPlugin.getTypeId()) == null) {
					return false;
				}
				if(getTag(resource) == null) {
					return false;
				}
				// Don't enable if there are sticky file revisions in the lineup
				if (resources[i].getType() == IResource.FILE) {
					ICVSFile file = CVSWorkspaceRoot.getCVSFileFor((IFile)resources[i]);
					ResourceSyncInfo info = file.getSyncInfo();
					if (info != null && info.getTag() != null) {
						String revision = info.getRevision();
						String tag = info.getTag().getName();
						if (revision.equals(tag)) return false;
					}
				}
			}
			return super.isEnabled();
		}
		return false;
	}
	/**
	 * @see org.eclipse.team.internal.ccvs.ui.actions.CVSAction#getErrorTitle()
	 */
	protected String getErrorTitle() {
		return Policy.bind("CompareWithRemoteAction.compare"); //$NON-NLS-1$
	}

}