org.eclipse.pde.ds.ui.internal.editor.SourcePage.java Source code

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Here is the source code for org.eclipse.pde.ds.ui.internal.editor.SourcePage.java

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/**
 * Copyright (c) 2009 Anyware Technologies 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:
 *     Anyware Technologies - initial API and implementation
 *
 * $Id: SourcePage.java,v 1.3 2009/04/24 21:52:48 bcabe Exp $
 */
package org.eclipse.pde.ds.ui.internal.editor;

import java.io.*;
import java.util.Collections;
import java.util.EventObject;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.emf.common.command.CommandStackListener;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.*;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.source.*;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.pde.ds.scr.util.ScrResourceFactoryImpl;
import org.eclipse.pde.emfforms.editor.AbstractEmfFormPage;
import org.eclipse.pde.emfforms.editor.EmfFormEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.internal.editors.text.EditorsPlugin;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.sse.ui.internal.StructuredTextViewer;
import org.eclipse.wst.xml.ui.StructuredTextViewerConfigurationXML;

public class SourcePage extends AbstractEmfFormPage {
    private SourceViewer _sourceStructuredTextViewer;

    public final static String ID = "ds.source"; //$NON-NLS-1$

    /**
     * @param editor
     */
    public SourcePage(EmfFormEditor<?> editor) {
        super(editor);
    }

    public void bind(DataBindingContext bindingContext) {
        final EditingDomain editingDomain = ((DSEditor) getEditor()).getEditingDomain();

        editingDomain.getCommandStack().addCommandStackListener(new CommandStackListener() {
            public void commandStackChanged(EventObject event) {
                refreshSourceContent();
            }
        });

        // initialize content
        refreshSourceContent();
    }

    private void refreshSourceContent() {
        EObject obj = (EObject) getObservedValue().getValue();

        // Copies the root to avoid modifying it
        final StringWriter writer = new StringWriter();
        try {
            ((XMLResource) obj.eResource()).save(writer, Collections.EMPTY_MAP);
        } catch (IOException e) {
            // TODO log
        }
        final String result = writer.toString();
        writer.flush();
        if (_sourceStructuredTextViewer != null)
            _sourceStructuredTextViewer.getDocument().set(result);
    }

    public void createContents(Composite parent) {
        int VERTICAL_RULER_WIDTH = 12;

        GridLayout gl = new GridLayout(getNumColumns(), true);
        gl.verticalSpacing = 0;
        parent.setLayout(gl);
        ISharedTextColors sharedColors = EditorsPlugin.getDefault().getSharedTextColors();
        IOverviewRuler overviewRuler = new OverviewRuler(null, VERTICAL_RULER_WIDTH, sharedColors);

        String contentTypeID = "org.eclipse.pde.ds.content-type"; //$NON-NLS-1$
        _sourceStructuredTextViewer = new StructuredTextViewer(parent, new VerticalRuler(VERTICAL_RULER_WIDTH),
                null, false, SWT.V_SCROLL | SWT.WRAP);
        ((StructuredTextViewer) _sourceStructuredTextViewer).getTextWidget()
                .setFont(JFaceResources.getFont("org.eclipse.wst.sse.ui.textfont")); //$NON-NLS-1$
        IStructuredModel scratchModel = StructuredModelManager.getModelManager()
                .createUnManagedStructuredModelFor(contentTypeID);
        IDocument document = scratchModel.getStructuredDocument();

        SourceViewerConfiguration sourceViewerConfiguration = new StructuredTextViewerConfigurationXML() {
            @Override
            public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
                return super.getContentAssistant(sourceViewer);
            }
        };
        _sourceStructuredTextViewer.configure(sourceViewerConfiguration);
        _sourceStructuredTextViewer.setDocument(document);
        //_sourceStructuredTextViewer.setEditable(false);

        _sourceStructuredTextViewer.addTextListener(new ITextListener() {
            public void textChanged(TextEvent event) {
                // FIXME this is ***VERY*** hackish
                reloadEObjectFromString(_sourceStructuredTextViewer.getDocument().get());
            }
        });
        GridDataFactory.fillDefaults().grab(true, true).applyTo(_sourceStructuredTextViewer.getControl());

    }

    @Override
    public String getId() {
        return ID;
    }

    @Override
    public String getPartName() {
        return "Source";
    }

    @Override
    public Viewer getViewer() {
        return null;
    }

    private IObservableValue getObservedValue() {
        return ((DSEditor) getEditor()).getInputObservable();
    }

    private void reloadEObjectFromString(String string) {
        EObject obj = (EObject) getObservedValue().getValue();

        // Copies the root to avoid modifying it
        final ByteArrayInputStream reader = new ByteArrayInputStream(string.getBytes());
        try {
            Resource r = new ScrResourceFactoryImpl().createResource(URI.createURI("tmp"));
            r.unload();
            r.load(reader, Collections.EMPTY_MAP);
            getObservedValue().setValue(r.getContents().get(0));
        } catch (IOException e) {
            // TODO log
        }
    }

}