org.eclipse.tm4e.ui.internal.widgets.TMViewer.java Source code

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Here is the source code for org.eclipse.tm4e.ui.internal.widgets.TMViewer.java

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/**
 *  Copyright (c) 2015-2017 Angelo ZERR.
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 *  Contributors:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package org.eclipse.tm4e.ui.internal.widgets;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.presentation.IPresentationReconciler;
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.SourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.tm4e.core.grammar.IGrammar;
import org.eclipse.tm4e.ui.text.TMPresentationReconciler;
import org.eclipse.tm4e.ui.themes.ITheme;

/**
 * Simple TextMate Viewer.
 *
 */
public class TMViewer extends SourceViewer {

    private TMPresentationReconciler reconciler;

    public TMViewer(Composite parent, IVerticalRuler ruler, int styles) {
        super(parent, ruler, styles);
        init();
    }

    public TMViewer(Composite parent, IVerticalRuler verticalRuler, IOverviewRuler overviewRuler,
            boolean showAnnotationsOverview, int styles) {
        super(parent, verticalRuler, overviewRuler, showAnnotationsOverview, styles);
        init();
    }

    private void init() {
        this.reconciler = new TMPresentationReconciler();
        SourceViewerConfiguration configuration = new TMSourceViewerConfiguration();
        this.configure(configuration);
    }

    private class TMSourceViewerConfiguration extends SourceViewerConfiguration {

        @Override
        public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) {
            return reconciler;
        }

    }

    public void setGrammar(IGrammar grammar) {
        reconciler.setGrammar(grammar);
        if (getDocument() == null) {
            super.setDocument(new Document());
        }
    }

    public void setTheme(ITheme theme) {
        reconciler.setThemeId(theme.getId());
        StyledText styledText = getTextWidget();
        styledText.setForeground(null);
        styledText.setBackground(null);
        theme.initializeViewerColors(styledText);
        getTextWidget().setFont(JFaceResources.getTextFont());
    }

    public void setText(String text) {
        if (getDocument() == null) {
            super.setDocument(new Document());
        }
        getDocument().set(text);
    }
}