SourcesFileDownloadHyperlink.java

/*******************************************************************************
 * Copyright (c) 2010, 2013 Red Hat, Inc.
 * 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:
 *     Alexander Kurtakov (Red Hat) - initial API and implementation
 *******************************************************************************/
package org.eclipse.linuxtools.internal.rpm.ui.editor.hyperlink;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.hyperlink.IHyperlink;
import org.eclipse.linuxtools.rpm.core.IRPMConstants;
import org.eclipse.linuxtools.rpm.core.utils.DownloadJob;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.MessageBox;

public class SourcesFileDownloadHyperlink implements IHyperlink {
    private String fileName;
    private IFile original;
    private IRegion region;

    /**
     * Creates hyperlink for the following file name, region and file whether
     * the file name is found.
     *
     * @param original
     *            The file where the reference to this file name is.
     * @param fileName
     *            The name of the file to open.
     * @param region
     *            The hyperlink region.
     */
    public SourcesFileDownloadHyperlink(IFile original, String fileName,
            IRegion region) {
        this.fileName = fileName;
        this.original = original;
        this.region = region;
    }

    @Override
    public IRegion getHyperlinkRegion() {
        return region;
    }

    @Override
    public String getHyperlinkText() {
        return NLS.bind(Messages.SourcesFileHyperlink_1, fileName);
    }

    @Override
    public String getTypeLabel() {
        return null;
    }

    /**
     * Tries to open the given file name looking for it in the current directory
     * and in ../SOURCES.
     *
     * @see org.eclipse.jface.text.hyperlink.IHyperlink#open()
     */
    @Override
    public void open() {
        IContainer container = original.getParent();
        IResource saveFolder = container.getParent().findMember(
                IRPMConstants.SOURCES_FOLDER);
        if (saveFolder == null) {
            saveFolder = container.findMember(original.getFullPath()
                    .removeLastSegments(1));
        }
        if (saveFolder == null) {
            saveFolder = container.findMember("/"); //$NON-NLS-1$
        }
        try {
            URL url = new URL(fileName);
            URLConnection connection = url.openConnection();
            String savedFileName = fileName
                    .substring(fileName.lastIndexOf('/') + 1);
            IFile savedFile = original.getProject().getFile(
                    saveFolder.getProjectRelativePath().append(savedFileName));
            if (savedFile.exists()) {
                MessageBox mb = new MessageBox(Display.getCurrent()
                        .getActiveShell(), SWT.ICON_QUESTION | SWT.OK
                        | SWT.CANCEL);
                mb.setText(Messages.SourcesFileDownloadHyperlink_0);
                mb.setMessage(NLS.bind(Messages.SourcesFileDownloadHyperlink_1,
                        savedFileName));
                int rc = mb.open();
                if (rc == SWT.OK) {
                    new DownloadJob(savedFile, connection).schedule();
                }

            } else {
                new DownloadJob(savedFile, connection).schedule();
            }
        } catch (IOException e) {
            MessageBox mb = new MessageBox(Display.getCurrent()
                    .getActiveShell(), SWT.ICON_WARNING | SWT.OK);
            mb.setMessage(Messages.SourcesFileDownloadHyperlink_2);
            mb.setText(Messages.SourcesFileDownloadHyperlink_3);
            mb.open();
        }
    }

}