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

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Here is the source code for org.eclipse.rcptt.ui.editors.ecl.EclInformationContol.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 java.io.IOException;
import java.net.URL;

import org.eclipse.jface.internal.text.html.BrowserInformationControl;
import org.eclipse.jface.internal.text.html.HTMLPrinter;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Shell;

import com.google.common.base.Charsets;
import com.google.common.io.Resources;
import org.eclipse.rcptt.internal.ui.Q7UIPlugin;

@SuppressWarnings("restriction")
public class EclInformationContol extends BrowserInformationControl {

    public EclInformationContol(Shell parent, boolean resizeable) {
        super(parent, JFaceResources.DIALOG_FONT, resizeable);
    }

    public static boolean isAvailable(Shell parent) {
        return BrowserInformationControl.isAvailable(parent);
    }

    @SuppressWarnings("deprecation")
    @Override
    public void setInformation(final String content) {
        super.setInformation(applyStyling(content));
    }

    public static String applyStyling(String html) {
        String styles = loadStyles();
        FontData fontData = JFaceResources.getDialogFont().getFontData()[0];
        styles = HTMLPrinter.convertTopLevelFont(styles, fontData);

        StringBuffer b = new StringBuffer(html);
        b.insert(0, "</style></head><body>");
        b.insert(0, styles);
        b.insert(0, "<html><head><style type=\"text/css\">");
        b.append("</body></html>");

        return b.toString();
    }

    private static String styles = null;

    private static String loadStyles() {
        if (styles != null)
            return styles;

        try {
            URL url = Q7UIPlugin.getDefault().getBundle().getResource("/docs.css");
            // Check for missing styles resource.
            if (url == null) {
                return styles = "";
            }
            return styles = Resources.toString(url, Charsets.UTF_8);
        } catch (IOException e) {
            Q7UIPlugin.log(e);
            return styles = "";
        }
    }
}