com.aptana.ide.ui.io.navigator.actions.FileSystemCopyAction.java Source code

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Here is the source code for com.aptana.ide.ui.io.navigator.actions.FileSystemCopyAction.java

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/**
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.ui.io.navigator.actions;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.filesystem.EFS;
import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.BaseSelectionListenerAction;

import com.aptana.core.io.efs.EFSUtils;
import com.aptana.ide.ui.io.FileSystemUtils;
import com.aptana.ide.ui.io.IOUIPlugin;

/**
 * @author Michael Xia (mxia@aptana.com)
 */
public class FileSystemCopyAction extends BaseSelectionListenerAction {

    /**
     * The id of this action
     */
    public static final String ID = IOUIPlugin.PLUGIN_ID + ".CopyAction"; //$NON-NLS-1$

    /**
     * The shell in which to show any dialogs
     */
    private Shell fShell;

    /**
     * System clipboard
     */
    private Clipboard fClipboard;

    private List<IFileStore> fFileStores;

    /**
     * Associated paste action. May be <code>null</code>
     */
    private FileSystemPasteAction fPasteAction;

    public FileSystemCopyAction(Shell shell, Clipboard clipboard) {
        super(Messages.FileSystemCopyAction_TXT);
        fShell = shell;
        fClipboard = clipboard;
        fFileStores = new ArrayList<IFileStore>();

        setToolTipText(Messages.FileSystemCopyAction_TTP);
        setId(ID);
        PlatformUI.getWorkbench().getHelpSystem().setHelp(this, "CopyHelpId"); //$NON-NLS-1$
    }

    public FileSystemCopyAction(Shell shell, Clipboard clipboard, FileSystemPasteAction pasteAction) {
        this(shell, clipboard);
        fPasteAction = pasteAction;
    }

    @Override
    public void run() {
        // Get the file names and a string representation
        IFileStore[] fileStores = fFileStores.toArray(new IFileStore[fFileStores.size()]);
        String[] fileNames = new String[fileStores.length];
        StringBuilder buf = new StringBuilder();
        for (int i = 0; i < fileStores.length; ++i) {
            fileNames[i] = fileStores[i].toString();
            if (i > 0) {
                buf.append('\n'); // $codepro.audit.disable platformSpecificLineSeparator
            }
            buf.append(fileStores[i].getName());
        }
        setClipboard(fileStores, fileNames, buf.toString());

        // update the enablement of the paste action
        // workaround since the clipboard does not support callbacks
        if (fPasteAction != null && fPasteAction.getStructuredSelection() != null) {
            fPasteAction.selectionChanged(fPasteAction.getStructuredSelection());
        }
    }

    @Override
    protected boolean updateSelection(IStructuredSelection selection) {
        fFileStores.clear();
        if (!super.updateSelection(selection)) {
            return false;
        }

        if (selection == null || selection.isEmpty()) {
            return false;
        }
        Object[] elements = selection.toArray();

        IFileStore fileStore;
        for (Object element : elements) {
            fileStore = getFileStore(element);
            if (fileStore != null) {
                fFileStores.add(fileStore);
            }
        }
        if (fFileStores.size() == 0) {
            return false;
        }

        // must have a common parent
        IFileStore firstParent = fFileStores.get(0).getParent();
        if (firstParent == null) {
            return false;
        }

        for (IFileStore store : fFileStores) {
            if (!store.getParent().equals(firstParent)) {
                return false;
            }
        }

        return true;
    }

    private void setClipboard(IFileStore[] fileStores, String[] fileNames, String names) {
        try {
            // set the clipboard contents
            LocalSelectionTransfer selectionTransfer = LocalSelectionTransfer.getTransfer();
            selectionTransfer.setSelection(new StructuredSelection(fileStores));
            if (fileNames.length > 0) {
                fClipboard.setContents(new Object[] { fileStores, fileNames, names },
                        new Transfer[] { LocalSelectionTransfer.getTransfer(), FileTransfer.getInstance(),
                                TextTransfer.getInstance() });
            } else {
                fClipboard.setContents(new Object[] { fileStores, names },
                        new Transfer[] { LocalSelectionTransfer.getTransfer(), TextTransfer.getInstance() });
            }
        } catch (SWTError e) {
            if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD) {
                throw e; // $codepro.audit.disable thrownExceptions
            }
            if (MessageDialog.openQuestion(fShell, "Problem with copy title", //$NON-NLS-1$
                    "Problem with copy.")) { //$NON-NLS-1$
                setClipboard(fileStores, fileNames, names);
            }
        }
    }

    private static IFileStore getFileStore(Object adaptable) {
        if (adaptable instanceof IAdaptable) {
            IResource resource = (IResource) ((IAdaptable) adaptable).getAdapter(IResource.class);
            if (resource != null) {
                try {
                    return EFS.getStore(resource.getLocationURI());
                } catch (CoreException e) {
                    return EFSUtils.getFileStore(resource);
                }
            }
        }
        return FileSystemUtils.getFileStore(adaptable);
    }
}