com.synflow.ngDesign.ui.internal.navigator.EditActionProvider.java Source code

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Here is the source code for com.synflow.ngDesign.ui.internal.navigator.EditActionProvider.java

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/*******************************************************************************
 * Copyright (c) 2003, 2011, 2014 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
 *
 * Contributors:
 *    IBM Corporation - initial API and implementation
 *    Matthieu Wipliez (Synflow SAS) - modified
 *******************************************************************************/
package com.synflow.ngDesign.ui.internal.navigator;

import java.util.Iterator;

import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.window.IShellProvider;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchCommandConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.TextActionHandler;
import org.eclipse.ui.navigator.CommonActionProvider;
import org.eclipse.ui.navigator.ICommonActionExtensionSite;
import org.eclipse.ui.navigator.ICommonMenuConstants;

import com.synflow.core.layout.ITreeElement;
import com.synflow.ngDesign.ui.internal.navigator.actions.CopyAction;
import com.synflow.ngDesign.ui.internal.navigator.actions.DeleteAction;
import com.synflow.ngDesign.ui.internal.navigator.actions.PasteAction;

/**
 * This class describes an edit action provider.
 * 
 * @author Matthieu Wipliez
 * 
 */
public class EditActionProvider extends CommonActionProvider {

    private Clipboard clipboard;

    private CopyAction copyAction;

    private DeleteAction deleteAction;

    private PasteAction pasteAction;

    private Shell shell;

    private TextActionHandler textActionHandler;

    @Override
    public void dispose() {
        if (clipboard != null) {
            clipboard.dispose();
            clipboard = null;
        }

        super.dispose();
    }

    @Override
    public void fillActionBars(IActionBars actionBars) {
        if (textActionHandler == null) {
            textActionHandler = new TextActionHandler(actionBars); // hook handlers
        }

        textActionHandler.setCopyAction(copyAction);
        textActionHandler.setPasteAction(pasteAction);
        textActionHandler.setDeleteAction(deleteAction);

        updateActionBars();

        textActionHandler.updateActionBars();
    }

    @Override
    public void fillContextMenu(IMenuManager menu) {
        IStructuredSelection selection = (IStructuredSelection) getContext().getSelection();

        boolean canCopy = true, canPaste = true, canDelete = true;
        Iterator<?> it = selection.iterator();
        while (it.hasNext()) {
            Object obj = it.next();
            if (obj instanceof ITreeElement) {
                // cannot copy a package or source folder
                canCopy = false;

                // cannot paste in or delete source folder
                ITreeElement element = (ITreeElement) obj;
                if (element.isSourceFolder()) {
                    canPaste = canDelete = false;
                }
            }
        }

        if (canCopy) {
            copyAction.selectionChanged(selection);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, copyAction);
        }

        if (canPaste) {
            pasteAction.selectionChanged(selection);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, pasteAction);
        }

        if (canDelete) {
            deleteAction.selectionChanged(selection);
            menu.appendToGroup(ICommonMenuConstants.GROUP_EDIT, deleteAction);
        }
    }

    @Override
    public void init(ICommonActionExtensionSite site) {
        shell = site.getViewSite().getShell();

        makeActions();
    }

    protected void makeActions() {
        clipboard = new Clipboard(shell.getDisplay());

        ISharedImages images = PlatformUI.getWorkbench().getSharedImages();

        IShellProvider sp = new IShellProvider() {
            @Override
            public Shell getShell() {
                return shell;
            }
        };

        copyAction = new CopyAction(shell, clipboard);
        copyAction.setDisabledImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED));
        copyAction.setImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_COPY));
        copyAction.setActionDefinitionId(IWorkbenchCommandConstants.EDIT_COPY);

        pasteAction = new PasteAction(shell, clipboard);
        pasteAction.setDisabledImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_PASTE_DISABLED));
        pasteAction.setImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_PASTE));
        pasteAction.setActionDefinitionId(IWorkbenchCommandConstants.EDIT_PASTE);

        deleteAction = new DeleteAction(sp);
        deleteAction.setDisabledImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE_DISABLED));
        deleteAction.setImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE));
        deleteAction.setActionDefinitionId(IWorkbenchCommandConstants.EDIT_DELETE);
    }

    @Override
    public void updateActionBars() {
        IStructuredSelection selection = (IStructuredSelection) getContext().getSelection();

        copyAction.selectionChanged(selection);
        pasteAction.selectionChanged(selection);
        deleteAction.selectionChanged(selection);
    }

}