org.eclipse.egit.core.internal.CompareCoreUtils.java Source code

Introduction

Here is the source code for org.eclipse.egit.core.internal.CompareCoreUtils.java

Source

/*******************************************************************************
 * Copyright (c) 2010, SAP AG
 *
 * 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:
 *    Stefan Lay (SAP AG) - initial implementation
 *    Benjamin Muskalla (Tasktop Technologies) - moved into Core for reusability
 *******************************************************************************/
package org.eclipse.egit.core.internal;

import org.eclipse.core.resources.IEncodedStorage;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;

/**
 * Utility class for compare-related functionality
 */
public class CompareCoreUtils {

    /**
     * Determine the encoding used by Eclipse for the resource which belongs to
     * repoPath in the eclipse workspace or null if no resource is found
     *
     * @param db
     *            the repository
     * @param repoPath
     *            the path in the git repository
     * @return the encoding used in eclipse for the resource or null if
     *
     */
    public static String getResourceEncoding(Repository db, String repoPath) {
        if (db.isBare())
            return null;
        IWorkspace workspace = ResourcesPlugin.getWorkspace();
        IWorkspaceRoot root = workspace.getRoot();
        IPath absolutePath = new Path(db.getWorkTree().getAbsolutePath()).append(repoPath);
        IResource resource = root.getFileForLocation(absolutePath);
        if (resource == null)
            return null;

        return getResourceEncoding(resource);
    }

    /**
     * Determine the encoding used by eclipse for the resource.
     *
     * @param resource
     *            must be an instance of IEncodedStorage
     * @return the encoding used in Eclipse for the resource if found or null
     */
    public static String getResourceEncoding(IResource resource) {
        // Get the encoding for the current version. As a matter of
        // principle one might want to use the eclipse settings for the
        // version we are retrieving as that may be defined by the
        // project settings, but there is no historic API for this.
        String charset;
        IEncodedStorage encodedStorage = ((IEncodedStorage) resource);
        try {
            charset = encodedStorage.getCharset();
            if (charset == null)
                charset = resource.getParent().getDefaultCharset();
        } catch (CoreException e) {
            charset = Constants.CHARACTER_ENCODING;
        }
        return charset;
    }

}