org.eclipse.dltk.internal.ui.refactoring.reorg.CutAction.java Source code

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Here is the source code for org.eclipse.dltk.internal.ui.refactoring.reorg.CutAction.java

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/*******************************************************************************
 * Copyright (c) 2000, 2007 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
 *
     
 *******************************************************************************/
package org.eclipse.dltk.internal.ui.refactoring.reorg;

import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.dltk.core.ScriptModelUtil;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.IType;
import org.eclipse.dltk.internal.corext.refactoring.RefactoringAvailabilityTester;
import org.eclipse.dltk.internal.corext.refactoring.RefactoringExecutionStarter;
import org.eclipse.dltk.internal.corext.refactoring.reorg.ReorgUtils;
import org.eclipse.dltk.internal.ui.refactoring.RefactoringMessages;
import org.eclipse.dltk.ui.DLTKUIPlugin;
import org.eclipse.dltk.ui.actions.SelectionDispatchAction;
import org.eclipse.dltk.ui.util.ExceptionHandler;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchSite;

public class CutAction extends SelectionDispatchAction {

    private CopyToClipboardAction fCopyToClipboardAction;

    public CutAction(IWorkbenchSite site, Clipboard clipboard, SelectionDispatchAction pasteAction) {
        super(site);
        setText(ReorgMessages.CutAction_text);
        fCopyToClipboardAction = new CopyToClipboardAction(site, clipboard, pasteAction);

        ISharedImages workbenchImages = DLTKUIPlugin.getDefault().getWorkbench().getSharedImages();
        setDisabledImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_CUT_DISABLED));
        setImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_CUT));
        setHoverImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_CUT));

        //      PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IScriptHelpContextIds.CUT_ACTION);
    }

    public void selectionChanged(IStructuredSelection selection) {
        if (!selection.isEmpty()) {
            try {
                // cannot cut top-level types. this deletes the cu and then you cannot paste because the cu is gone.
                if (!containsOnlyElementsInsideSourceModules(selection) || containsTopLevelTypes(selection)) {
                    setEnabled(false);
                    return;
                }
                fCopyToClipboardAction.selectionChanged(selection);
                setEnabled(fCopyToClipboardAction.isEnabled()
                        && RefactoringAvailabilityTester.isDeleteAvailable(selection));
            } catch (CoreException e) {
                // no ui here - this happens on selection changes
                // http://bugs.eclipse.org/bugs/show_bug.cgi?id=19253
                if (ScriptModelUtil.isExceptionToBeLogged(e))
                    DLTKUIPlugin.log(e);
                setEnabled(false);
            }
        } else
            setEnabled(false);
    }

    private static boolean containsOnlyElementsInsideSourceModules(IStructuredSelection selection) {
        for (Iterator iter = selection.iterator(); iter.hasNext();) {
            Object object = iter.next();
            if (!(object instanceof IModelElement && ReorgUtils.isInsideSourceModule((IModelElement) object)))
                return false;
        }
        return true;
    }

    private static boolean containsTopLevelTypes(IStructuredSelection selection) {
        for (Iterator iter = selection.iterator(); iter.hasNext();) {
            Object each = iter.next();
            if ((each instanceof IType) && ((IType) each).getDeclaringType() == null)
                return true;
        }
        return false;
    }

    public void run(IStructuredSelection selection) {
        try {
            selectionChanged(selection);
            if (isEnabled()) {
                fCopyToClipboardAction.run(selection);
                RefactoringExecutionStarter.startCutRefactoring(selection.toArray(), getShell());
            }
        } catch (CoreException e) {
            ExceptionHandler.handle(e, RefactoringMessages.OpenRefactoringWizardAction_refactoring,
                    RefactoringMessages.OpenRefactoringWizardAction_exception);
        } catch (InterruptedException e) {
            //OK
        } catch (InvocationTargetException e) {
            ExceptionHandler.handle(e, RefactoringMessages.OpenRefactoringWizardAction_refactoring,
                    RefactoringMessages.OpenRefactoringWizardAction_exception);
        }
    }
}