org.eclipse.rcptt.ui.editors.ecl.EnhancedSourceViewer.java Source code

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Here is the source code for org.eclipse.rcptt.ui.editors.ecl.EnhancedSourceViewer.java

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/*******************************************************************************
 * Copyright (c) 2009, 2014 Xored Software Inc 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:
 *     Xored Software Inc - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.rcptt.ui.editors.ecl;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentPartitioner;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.rules.FastPartitioner;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.text.source.IOverviewRuler;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.IVerticalRuler;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Composite;

public class EnhancedSourceViewer extends ProjectionViewer implements IPropertyChangeListener, ISourceViewer {

    protected EditorToolkit toolkit;

    public EnhancedSourceViewer(Composite parent, IVerticalRuler ruler, IOverviewRuler overviewRuler,
            boolean showsAnnotationOverview, int styles) {
        super(parent, ruler, overviewRuler, showsAnnotationOverview, styles);
    }

    public void propertyChange(PropertyChangeEvent event) {
        // Do nothing
    }

    public IContentAssistant getContentAssistant() {
        return super.fContentAssistant;
    }

    @Override
    public void configure(SourceViewerConfiguration configuration) {
        StyledText textWidget = getTextWidget();
        // reset foreground & background colors
        if (textWidget != null && !textWidget.isDisposed()) {
            Color foregroundColor = textWidget.getForeground();
            if (foregroundColor != null && foregroundColor.isDisposed())
                textWidget.setForeground(null);
            Color backgroundColor = textWidget.getBackground();
            if (backgroundColor != null && backgroundColor.isDisposed())
                textWidget.setBackground(null);
        }
        super.configure(configuration);
        // set font from preferences
        if (configuration instanceof EnhancedSourceViewerConfiguration) {
            toolkit = ((EnhancedSourceViewerConfiguration) configuration).getEditorToolkit();
            if (textWidget != null) {
                textWidget.setFont(JFaceResources.getFont(toolkit.getEditorTextFont()));
            }
            IDocument document = getDocument();
            if (document != null) {
                IDocumentPartitioner partitioner = new FastPartitioner(toolkit.getPartitionScanner(),
                        toolkit.getPartitions());
                partitioner.connect(document);
                document.setDocumentPartitioner(partitioner);
            }
        }
    }

    @Override
    public void resetVisibleRegion() {
        super.resetVisibleRegion();
        enableProjection();
    }

    @Override
    public void setDocument(IDocument document, IAnnotationModel annotationModel, int modelRangeOffset,
            int modelRangeLength) {
        if (document != null && toolkit != null) {
            IDocumentPartitioner partitioner = new FastPartitioner(toolkit.getPartitionScanner(),
                    toolkit.getPartitions());
            partitioner.connect(document);
            document.setDocumentPartitioner(partitioner);
        }
        super.setDocument(document, annotationModel, modelRangeOffset, modelRangeLength);
    }

    @Override
    protected void disposeVisualAnnotationModel() {
        super.disposeVisualAnnotationModel();
        if (toolkit != null)
            toolkit.dispose();
    }
}