org.eclipse.nebula.widgets.richtext.painter.ResourceHelper.java Source code

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Here is the source code for org.eclipse.nebula.widgets.richtext.painter.ResourceHelper.java

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/*****************************************************************************
 * Copyright (c) 2015 CEA LIST.
 *
 * 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:
 *      Dirk Fauth <dirk.fauth@googlemail.com> - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.nebula.widgets.richtext.painter;

import java.util.Arrays;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.RGB;

//TODO javadoc

public class ResourceHelper {

    private ResourceHelper() {
    }

    public static Color getColor(String rgbString) {
        if (!JFaceResources.getColorRegistry().hasValueFor(rgbString)) {
            // rgb string in format rgb(r, g, b)
            String rgbValues = rgbString.substring(rgbString.indexOf('(') + 1, rgbString.lastIndexOf(')'));
            String[] values = rgbValues.split(",");
            try {
                int red = Integer.valueOf(values[0].trim());
                int green = Integer.valueOf(values[1].trim());
                int blue = Integer.valueOf(values[2].trim());

                JFaceResources.getColorRegistry().put(rgbString, new RGB(red, green, blue));
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
        }
        return JFaceResources.getColorRegistry().get(rgbString);
    }

    public static Font getFont(FontData... fontDatas) {
        StringBuilder keyBuilder = new StringBuilder();
        for (FontData fontData : fontDatas) {
            keyBuilder.append(fontData.toString());
        }
        String key = keyBuilder.toString();

        if (!JFaceResources.getFontRegistry().hasValueFor(key)) {
            JFaceResources.getFontRegistry().put(key, fontDatas);
        }
        return JFaceResources.getFont(key);
    }

    public static Font getFont(Font currentFont, String name, Integer size) {
        FontData[] original = currentFont.getFontData();
        FontData[] fontData = Arrays.copyOf(original, original.length);
        for (FontData data : fontData) {
            if (name != null) {
                data.setName(name);
            }
            if (size != null) {
                data.setHeight(size);
            }
        }

        return getFont(fontData);
    }

    public static Font getBoldFont(Font currentFont) {
        FontData[] original = currentFont.getFontData();
        FontData[] fontData = Arrays.copyOf(original, original.length);
        for (FontData data : fontData) {
            data.setStyle(data.getStyle() | SWT.BOLD);
        }

        return getFont(fontData);
    }

    public static Font getItalicFont(Font currentFont) {
        FontData[] original = currentFont.getFontData();
        FontData[] fontData = Arrays.copyOf(original, original.length);
        for (FontData data : fontData) {
            data.setStyle(data.getStyle() | SWT.ITALIC);
        }

        return getFont(fontData);
    }

    public static String ltrim(String s) {
        int i = 0;
        while (i < s.length() && Character.isWhitespace(s.charAt(i))) {
            i++;
        }
        return s.substring(i);
    }

    public static String rtrim(String s) {
        int i = s.length() - 1;
        while (i >= 0 && Character.isWhitespace(s.charAt(i))) {
            i--;
        }
        return s.substring(0, i + 1);
    }

}