com.appnativa.studio.wizards.NewLayout.java Source code

Introduction

Here is the source code for com.appnativa.studio.wizards.NewLayout.java

Source

/*
 * @(#)NewLayout.java
 * 
 * Copyright (c) appNativa. All rights reserved.
 *
 * Use is subject to license terms.
 */

package com.appnativa.studio.wizards;

import com.appnativa.studio.Studio;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWizard;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import java.lang.reflect.InvocationTargetException;

/**
 * This is a sample new wizard. Its role is to create a new file
 * resource in the provided container. If the container resource
 * (a folder or a project) is selected in the workspace
 * when the wizard is opened, it will accept it as the target
 * container. The wizard creates one file with the extension
 * "sdf". If a sample multi-page editor (also available
 * as a template) is registered for the same extension, it will
 * be able to open it.
 */
public class NewLayout extends Wizard implements INewWizard {
    private String contents;
    private NewLayoutPage page;
    private ISelection selection;

    /**
     * Constructor for NewLayout.
     */
    public NewLayout() {
        super();
    }

    /**
     * Adding the page to the wizard.
     */
    public void addPages() {
        page = new NewLayoutPage(selection);
        addPage(page);
    }

    /**
     * We will accept the selection in the workbench to see if
     * we can initialize from it.
     * @see IWorkbenchWizard#init(IWorkbench, IStructuredSelection)
     */
    public void init(IWorkbench workbench, IStructuredSelection selection) {
        this.selection = selection;
    }

    /**
     * This method is called when 'Finish' button is pressed in
     * the wizard. We will create an operation and run it
     * using wizard as execution context.
     */
    public boolean performFinish() {
        final String containerName = page.getContainerName();
        final String fileName = page.getFileName();
        String id = page.getWidgetType();

        if (id != null) {
            Object o = Studio.getAttribute(id);

            if (o != null) {
                contents = o.toString();
            }
        }

        if (contents == null) {
            contents = "";
        }

        IRunnableWithProgress op = new IRunnableWithProgress() {
            public void run(IProgressMonitor monitor) throws InvocationTargetException {
                try {
                    doFinish(containerName, fileName, monitor);
                } catch (CoreException e) {
                    throw new InvocationTargetException(e);
                } finally {
                    monitor.done();
                }
            }
        };

        try {
            getContainer().run(true, false, op);
        } catch (InterruptedException e) {
            return false;
        } catch (InvocationTargetException e) {
            e.printStackTrace();

            Throwable realException = e.getTargetException();

            MessageDialog.openError(getShell(), "Error", realException.getMessage());

            return false;
        }

        return true;
    }

    /**
     * The worker method. It will find the container, create the
     * file if missing or just replace its contents, and open
     * the editor on the newly created file.
     */
    private void doFinish(String containerName, String fileName, IProgressMonitor monitor) throws CoreException {
        // create a sample file
        monitor.beginTask("Creating " + fileName, 2);

        IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
        IResource resource = root.findMember(new Path(containerName));

        if (!resource.exists() || !(resource instanceof IContainer)) {
            throwCoreException("Folder \"" + containerName + "\" does not exist.");
        }

        IContainer container = (IContainer) resource;
        final IFile file = container.getFile(new Path(fileName));

        try {
            InputStream stream = openContentStream();

            if (file.exists()) {
                file.setContents(stream, true, true, monitor);
            } else {
                file.create(stream, true, monitor);
            }

            stream.close();
        } catch (IOException e) {
        }

        monitor.worked(1);
        monitor.setTaskName("Opening file for editing...");
        getShell().getDisplay().asyncExec(new Runnable() {
            public void run() {
                IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();

                try {
                    IDE.openEditor(page, file, true);
                } catch (PartInitException e) {
                }
            }
        });
        monitor.worked(1);
    }

    /**
     * We will initialize file contents with a sample text.
     */
    private InputStream openContentStream() {
        return new ByteArrayInputStream(contents.getBytes());
    }

    private void throwCoreException(String message) throws CoreException {
        IStatus status = new Status(IStatus.ERROR, "com.appnativa.studio", IStatus.OK, message, null);

        throw new CoreException(status);
    }
}