net.sf.jvifm.ResourceManager.java Source code

Introduction

Here is the source code for net.sf.jvifm.ResourceManager.java

Source

/*
 * Jvifm - Java vifm (File Manager with vi like key binding)
 *
 * Copyright (C) 2006 wsn <shrek.wang@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
package net.sf.jvifm;

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;

import org.apache.commons.io.FilenameUtils;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

public class ResourceManager {
    private static ResourceManager instance = new ResourceManager();
    private static MimeUtil mimeUtil = MimeUtil.getInstance();
    @SuppressWarnings("unchecked")
    private static HashMap resources = new HashMap();
    private static Image fileImage = getImage("file.png"); //$NON-NLS-1$
    private static Image folderImage = getImage("folder.png"); //$NON-NLS-1$

    public static final Color ActiveListerBackground = getColor(255, 252, 220);

    @SuppressWarnings("unchecked")
    public static Image getImage(String url) {
        url = "icons/" + url;
        try {
            url = url.replace('\\', '/');
            if (url.startsWith("/"))
                url = url.substring(1);
            if (resources.containsKey(url))
                return (Image) resources.get(url);
            Image img = new Image(Display.getDefault(),
                    instance.getClass().getClassLoader().getResourceAsStream(url));
            if (img != null)
                resources.put(url, img);
            return img;
        } catch (Exception e) {
            System.err.println("SWTResourceManager.getImage: Error getting image " + url + ", " + e);
            return null;
        }
    }

    @SuppressWarnings("unchecked")
    public static Color getColor(int red, int green, int blue) {
        String key = String.valueOf(red) + String.valueOf(green) + String.valueOf(blue);
        if (resources.containsKey(key))
            return (Color) resources.get(key);
        Color color = new Color(Display.getDefault(), red, green, blue);
        resources.put(key, color);
        return color;
    }

    public static Image getMimeImage(File file) {
        if (file.isDirectory())
            return folderImage;
        String extName = FilenameUtils.getExtension(file.getName());
        String path = mimeUtil.getMimeIconPath(extName);
        if (path == null)
            return fileImage;
        Image mimeImage = getImage(path);
        if (mimeImage == null)
            return fileImage;
        return mimeImage;
    }

    public static Font getFont(String name, int size, int style) {
        return getFont(name, size, style, false, false);
    }

    @SuppressWarnings("unchecked")
    public static Font getFont(String name, int size, int style, boolean strikeout, boolean underline) {
        String fontName = name + "|" + size + "|" + style + "|" + strikeout + "|" + underline;
        if (resources.containsKey(fontName))
            return (Font) resources.get(fontName);
        FontData fd = new FontData(name, size, style);
        if (strikeout || underline) {
            try {
                Class lfCls = Class.forName("org.eclipse.swt.internal.win32.LOGFONT");
                Object lf = FontData.class.getField("data").get(fd);
                if (lf != null && lfCls != null) {
                    if (strikeout)
                        lfCls.getField("lfStrikeOut").set(lf, new Byte((byte) 1));
                    if (underline)
                        lfCls.getField("lfUnderline").set(lf, new Byte((byte) 1));
                }
            } catch (Throwable e) {
                System.err.println(
                        "Unable to set underline or strikeout" + " (probably on a non-Windows platform). " + e);
            }
        }
        Font font = new Font(Display.getDefault(), fd);
        resources.put(fontName, font);
        return font;
    }

    @SuppressWarnings("unchecked")
    public static void disposeResource() {
        Iterator it = resources.keySet().iterator();
        while (it.hasNext()) {
            Object resource = resources.get(it.next());
            if (resource instanceof Font)
                ((Font) resource).dispose();
            else if (resource instanceof Color)
                ((Color) resource).dispose();
            else if (resource instanceof Image)
                ((Image) resource).dispose();
            else if (resource instanceof Cursor)
                ((Cursor) resource).dispose();
        }
        resources.clear();

    }

}