com.google.gdt.eclipse.gph.wizards.ShowErrorPage.java Source code

Introduction

Here is the source code for com.google.gdt.eclipse.gph.wizards.ShowErrorPage.java

Source

/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gdt.eclipse.gph.wizards;

import com.google.gdt.eclipse.gph.ProjectHostingUIPlugin;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;

import java.io.PrintWriter;
import java.io.StringWriter;

/**
 * A general error page for wizards.
 */
public class ShowErrorPage extends AbstractWizardPage {
    private static Font BOLD_FONT;

    private static final String DEFAULT_MESSAGE = "Unable to import the project.";

    private IStatus status;

    public ShowErrorPage(IWizard wizard, IStatus status) {
        super("showErrorPage");

        this.status = status;

        setTitle(wizard.getWindowTitle());
        setDescription(DEFAULT_MESSAGE);
    }

    public ShowErrorPage(IWizard wizard, String message) {
        this(wizard, new Status(IStatus.ERROR, ProjectHostingUIPlugin.PLUGIN_ID, message));
    }

    public ShowErrorPage(IWizard wizard, Throwable exception) {
        this(wizard,
                new Status(IStatus.ERROR, ProjectHostingUIPlugin.PLUGIN_ID, exception.getMessage(), exception));
    }

    @Override
    protected Control createPageContents(Composite parent) {
        Composite composite = new Composite(parent, SWT.NONE);
        GridLayoutFactory.swtDefaults().margins(10, 10).numColumns(2).applyTo(composite);

        Label iconLabel = new Label(composite, SWT.NONE);
        iconLabel.setImage(JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_ERROR));

        Label titleLabel = new Label(composite, SWT.NONE);
        titleLabel.setText(status.getMessage());
        titleLabel.setFont(getBoldFont(titleLabel.getFont()));
        GridDataFactory.fillDefaults().grab(true, false).applyTo(titleLabel);

        // spacer
        new Label(composite, SWT.NONE);

        if (status.isMultiStatus() || status.getException() != null) {
            final Link link = new Link(composite, SWT.NONE);
            link.setText("<a>show details...</a>");
            link.addSelectionListener(new SelectionAdapter() {
                @Override
                public void widgetSelected(SelectionEvent e) {
                    replaceWithDetails(link);
                }
            });
            GridDataFactory.fillDefaults().grab(true, true).applyTo(link);
        }

        return composite;
    }

    protected void replaceWithDetails(Control control) {
        Composite parent = control.getParent();

        control.setVisible(false);
        GridDataFactory.swtDefaults().exclude(true).applyTo(control);

        TextViewer viewer = new TextViewer(parent,
                SWT.READ_ONLY | SWT.WRAP | SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
        viewer.setDocument(new Document(getDetailsText()));
        viewer.getControl().setBackground(parent.getBackground());
        GridDataFactory.fillDefaults().grab(true, true).applyTo(viewer.getControl());

        parent.layout();
    }

    private Font getBoldFont(Font templateFont) {
        if (BOLD_FONT == null) {
            FontData fontData = templateFont.getFontData()[0];

            BOLD_FONT = new Font(templateFont.getDevice(),
                    new FontData(fontData.getName(), fontData.getHeight(), SWT.BOLD));
        }

        return BOLD_FONT;
    }

    private String getDetailsText() {
        StringWriter stringWriter = new StringWriter();

        PrintWriter writer = new PrintWriter(stringWriter);

        print(status, writer);

        return stringWriter.toString().trim();
    }

    private void print(IStatus status, PrintWriter writer) {
        writer.println(status.toString());

        if (status.getException() != null) {
            writer.println();
            status.getException().printStackTrace(writer);
        }

        if (status.isMultiStatus()) {
            for (IStatus child : status.getChildren()) {
                writer.println();
                print(child, writer);
            }
        } else {
            if (status.getException() != null) {
                writer.println();
                status.getException().printStackTrace(writer);

                if (status.getException().getCause() != null
                        && status.getException().getCause() != status.getException()) {
                    writer.println();
                    status.getException().getCause().printStackTrace(writer);
                }
            }
        }
    }

}