at.bestsolution.code.swt.services.internal.ThemeTextAttributeFactory.java Source code

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Here is the source code for at.bestsolution.code.swt.services.internal.ThemeTextAttributeFactory.java

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/*******************************************************************************
* Copyright (c) 2016 BestSolution.at 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:
*    Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
*******************************************************************************/
package at.bestsolution.code.swt.services.internal;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;

import at.bestsolution.code.swt.services.TextAttributeFactory;
import at.bestsolution.code.swt.themes.Theme;
import at.bestsolution.code.swt.themes.ThemeManager;

@Component
public class ThemeTextAttributeFactory implements TextAttributeFactory, ThemeManager {
    private Theme currentTheme;
    private List<Theme> themeList = new ArrayList<>();

    @Override
    public void setTheme(String themeId) {
        this.currentTheme = themeList.stream().filter(t -> themeId.equals(t.getId())).findFirst().orElse(null);
    }

    @Reference(cardinality = ReferenceCardinality.MULTIPLE, policy = ReferencePolicy.DYNAMIC)
    public void registerTheme(Theme theme) {
        if (this.currentTheme == null) {
            this.currentTheme = theme;
        }
        themeList.add(theme);
    }

    public void unregisterTheme(Theme theme) {
        themeList.remove(theme);
    }

    @Override
    public TextAttribute getAttribute(String language, String tokenName) {
        if (currentTheme != null) {
            RGB rgb = currentTheme.getColor(language + "." + tokenName);
            if (rgb != null) {
                Color c = JFaceResources.getColorRegistry().get(rgb.toString());
                if (c == null) {
                    JFaceResources.getColorRegistry().put(rgb.toString(), rgb);
                    c = JFaceResources.getColorRegistry().get(rgb.toString());
                }
                int style = SWT.NORMAL;

                if (currentTheme.boldFont(language + "." + tokenName)) {
                    style |= SWT.BOLD;
                }
                if (currentTheme.italicFont(language + "." + tokenName)) {
                    style |= SWT.ITALIC;
                }

                return new TextAttribute(c, null, style);
            }
        }
        return new TextAttribute(null);
    }

}