SuppressionsEditor.java

/*******************************************************************************
 * Copyright (c) 2008, 2017 Phil Muldoon 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:
 *    Phil Muldoon <pkmuldoon@picobot.org> - initial API.
 *    Red Hat - modifications for use with Valgrind plugins.
 *******************************************************************************/
package org.eclipse.linuxtools.internal.valgrind.ui.editor;
import java.util.HashMap;

import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.IVerticalRuler;
import org.eclipse.jface.text.source.projection.ProjectionAnnotation;
import org.eclipse.jface.text.source.projection.ProjectionAnnotationModel;
import org.eclipse.jface.text.source.projection.ProjectionSupport;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.editors.text.TextEditor;


public class SuppressionsEditor extends TextEditor {

    private ProjectionAnnotationModel annotationModel;
    private Annotation[] oldAnnotations;

    public SuppressionsEditor() {
        setSourceViewerConfiguration(new SuppressionsConfiguration(this));
        setDocumentProvider(new SuppressionsDocumentProvider());
        oldAnnotations = null;
    }

    @Override
    public void createPartControl(Composite parent) {
        super.createPartControl(parent);
        ProjectionViewer viewer =(ProjectionViewer)getSourceViewer();
        ProjectionSupport projectionSupport = new ProjectionSupport(viewer, getAnnotationAccess(), getSharedColors());
        projectionSupport.install();
        viewer.doOperation(ProjectionViewer.TOGGLE);
        annotationModel = viewer.getProjectionAnnotationModel();
    }

    @Override
    protected ISourceViewer createSourceViewer(Composite parent,
            IVerticalRuler ruler, int styles) {

        ISourceViewer viewer = new ProjectionViewer(parent, ruler,
                getOverviewRuler(), isOverviewRulerVisible(), styles);
        getSourceViewerDecorationSupport(viewer);
        return viewer;
    }

    public void updateFoldingStructure(Position[] updatedPositions)    {
        Annotation[] updatedAnnotations = new Annotation[updatedPositions.length];
        HashMap<ProjectionAnnotation, Position> newAnnotations = new HashMap<>();
        for (int i = 0; i < updatedPositions.length; i++) {
            ProjectionAnnotation annotation = new ProjectionAnnotation();
            newAnnotations.put(annotation, updatedPositions[i]);
            updatedAnnotations[i] = annotation;
        }
        annotationModel.modifyAnnotations(oldAnnotations, newAnnotations, null);
        oldAnnotations = updatedAnnotations;
    }

}