org.jboss.tools.openshift.internal.ui.handler.AbstractOpenShiftCliHandler.java Source code

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Here is the source code for org.jboss.tools.openshift.internal.ui.handler.AbstractOpenShiftCliHandler.java

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/*******************************************************************************
 * Copyright (c) 2015 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.openshift.internal.ui.handler;

import org.apache.commons.lang.StringUtils;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Link;
import org.eclipse.ui.dialogs.PreferencesUtil;
import org.eclipse.ui.handlers.HandlerUtil;
import org.jboss.tools.openshift.internal.core.preferences.OCBinary;

import static org.jboss.tools.openshift.core.preferences.IOpenShiftCoreConstants.OPEN_SHIFT_PREFERENCE_PAGE_ID;

/**
 * 
 * @author jeff.cantrill
 *
 */
public abstract class AbstractOpenShiftCliHandler extends AbstractHandler {

    protected abstract void handleEvent(ExecutionEvent event);

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        String location = OCBinary.getInstance().getLocation();
        if (StringUtils.isBlank(location)) {

            final MessageDialog dialog = new MessageDialog(HandlerUtil.getActiveShell(event),
                    "Unknown executable location", null,
                    "The OpenShift Client '" + OCBinary.getInstance().getName() + "' executable can not be found.",
                    MessageDialog.ERROR, new String[] { IDialogConstants.OK_LABEL }, 0) {
                @Override
                protected Control createCustomArea(Composite parent) {
                    Composite container = new Composite(parent, SWT.NONE);
                    GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(container);
                    GridLayoutFactory.fillDefaults().applyTo(container);
                    Link link = new Link(container, SWT.WRAP);
                    link.setText("You must set the executable location in the <a>OpenShift 3 preferences</a>.");
                    link.addSelectionListener(new OpenPreferencesListener(this));
                    container.setFocus();
                    return container;
                }
            };
            dialog.open();
            return null;
        }
        handleEvent(event);
        return null;
    }

    private static class OpenPreferencesListener extends SelectionAdapter {

        private Dialog dialog;

        public OpenPreferencesListener(MessageDialog messageDialog) {
            this.dialog = messageDialog;
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            dialog.close();
            //Opening in asyncExec to workaround https://bugs.eclipse.org/471717 on OSX
            Display.getDefault().asyncExec(new Runnable() {
                @Override
                public void run() {
                    PreferencesUtil.createPreferenceDialogOn(Display.getDefault().getActiveShell(),
                            OPEN_SHIFT_PREFERENCE_PAGE_ID, new String[] { OPEN_SHIFT_PREFERENCE_PAGE_ID }, null)
                            .open();
                }
            });
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            widgetSelected(e);
        }
    }
}