ext.org.eclipse.jdt.internal.ui.refactoring.CreateTextFileChangePreviewViewer.java Source code

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Here is the source code for ext.org.eclipse.jdt.internal.ui.refactoring.CreateTextFileChangePreviewViewer.java

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/*******************************************************************************
 * Copyright (c) 2000, 2011 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
 *******************************************************************************/
package ext.org.eclipse.jdt.internal.ui.refactoring;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

import org.eclipse.core.runtime.IAdaptable;

import org.eclipse.jdt.ui.PreferenceConstants;
import patch.org.eclipse.jdt.ui.text.JavaSourceViewerConfiguration;
import patch.org.eclipse.jdt.ui.text.JavaTextTools;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;

import org.eclipse.ui.model.IWorkbenchAdapter;

import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.ui.refactoring.ChangePreviewViewerInput;
import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer;

import patch.org.eclipse.jdt.internal.ui.JavaPlugin;

import ext.org.eclipse.jdt.internal.corext.refactoring.nls.changes.CreateTextFileChange;
import ext.org.eclipse.jdt.internal.ui.propertiesfileeditor.IPropertiesFilePartitions;
import ext.org.eclipse.jdt.internal.ui.propertiesfileeditor.PropertiesFileDocumentSetupParticipant;
import ext.org.eclipse.jdt.internal.ui.propertiesfileeditor.PropertiesFileSourceViewerConfiguration;
import ext.org.eclipse.jdt.internal.ui.util.ViewerPane;

/**
 * Change preview viewer for <code>CreateTextFileChange</code> objects.
 */
public final class CreateTextFileChangePreviewViewer implements IChangePreviewViewer {

    private static class CreateTextFilePreviewer extends ViewerPane {

        private ImageDescriptor fDescriptor;

        private Image fImage;

        public CreateTextFilePreviewer(Composite parent, int style) {
            super(parent, style);
            addDisposeListener(new DisposeListener() {
                public void widgetDisposed(DisposeEvent e) {
                    disposeImage();
                }
            });
        }

        /*package*/ void disposeImage() {
            if (fImage != null) {
                fImage.dispose();
            }
        }

        public void setImageDescriptor(ImageDescriptor imageDescriptor) {
            fDescriptor = imageDescriptor;
        }

        @Override
        public void setText(String text) {
            super.setText(text);
            Image current = null;
            if (fDescriptor != null) {
                current = fImage;
                fImage = fDescriptor.createImage();
            } else {
                current = fImage;
                fImage = null;
            }
            setImage(fImage);
            if (current != null) {
                current.dispose();
            }
        }

    }

    private CreateTextFilePreviewer fPane;

    private SourceViewer fSourceViewer;

    /**
     * {@inheritDoc}
     */
    public void createControl(Composite parent) {
        fPane = new CreateTextFilePreviewer(parent, SWT.BORDER | SWT.FLAT);
        Dialog.applyDialogFont(fPane);

        fSourceViewer = new SourceViewer(fPane, null, SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.FULL_SELECTION);
        fSourceViewer.setEditable(false);
        fSourceViewer.getControl().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
        fPane.setContent(fSourceViewer.getControl());
    }

    /**
     * {@inheritDoc}
     */
    public Control getControl() {
        return fPane;
    }

    public void refresh() {
        fSourceViewer.refresh();
    }

    /**
     * {@inheritDoc}
     */
    public void setInput(ChangePreviewViewerInput input) {
        Change change = input.getChange();
        if (change != null) {
            Object element = change.getModifiedElement();
            if (element instanceof IAdaptable) {
                IAdaptable adaptable = (IAdaptable) element;
                IWorkbenchAdapter workbenchAdapter = (IWorkbenchAdapter) adaptable
                        .getAdapter(IWorkbenchAdapter.class);
                if (workbenchAdapter != null) {
                    fPane.setImageDescriptor(workbenchAdapter.getImageDescriptor(element));
                } else {
                    fPane.setImageDescriptor(null);
                }
            } else {
                fPane.setImageDescriptor(null);
            }
        }
        if (!(change instanceof CreateTextFileChange)) {
            fSourceViewer.setInput(null);
            fPane.setText(""); //$NON-NLS-1$
            return;
        }
        CreateTextFileChange textFileChange = (CreateTextFileChange) change;
        fPane.setText(textFileChange.getName());
        IDocument document = new Document(textFileChange.getPreview());
        // This is a temporary work around until we get the
        // source viewer registry.
        fSourceViewer.unconfigure();
        String textType = textFileChange.getTextType();
        JavaTextTools textTools = JavaPlugin.getDefault().getJavaTextTools();
        IPreferenceStore store = JavaPlugin.getDefault().getCombinedPreferenceStore();
        if ("java".equals(textType)) { //$NON-NLS-1$
            textTools.setupJavaDocumentPartitioner(document);
            fSourceViewer
                    .configure(new JavaSourceViewerConfiguration(textTools.getColorManager(), store, null, null));
        } else if ("properties".equals(textType)) { //$NON-NLS-1$
            PropertiesFileDocumentSetupParticipant.setupDocument(document);
            fSourceViewer.configure(new PropertiesFileSourceViewerConfiguration(textTools.getColorManager(), store,
                    null, IPropertiesFilePartitions.PROPERTIES_FILE_PARTITIONING));
        } else {
            fSourceViewer.configure(new SourceViewerConfiguration());
        }
        fSourceViewer.setInput(document);
    }
}