/*
 * Contributions to FindBugs
 * Copyright (C) 2008, Andrei Loskutov
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package de.tobject.findbugs.decorators;

import java.util.Set;

import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.IWorkingSet;

import de.tobject.findbugs.builder.ResourceUtils;
import de.tobject.findbugs.builder.WorkItem;
import de.tobject.findbugs.util.Util;

/**
 * A simple decorator which adds (in currently hardcoded way) bug counts to the
 * resources. There are 3 different decorators configured via plugin.xml
 * (project/folder/file), current implementation is the same for all.
 * 
 * @author Andrei
 */
public class ResourceBugCountDecorator implements ILabelDecorator {

    public Image decorateImage(Image image, Object element) {
        return null;
    }

    public String decorateText(String text, Object element) {
        WorkItem item = ResourceUtils.getWorkItem(element);
        if (item == null) {
            IWorkingSet workingSet = Util.getAdapter(IWorkingSet.class, element);
            if (workingSet != null) {
                return decorateText(text, workingSet);
            }
            return text;
        }
        return decorateText(text, item.getMarkerCount(false));
    }

    private static String decorateText(String text, int markerCount) {
        if (markerCount == 0) {
            return text;
        }
        return text + " (" + markerCount + ")";
    }

    private static String decorateText(String text, IWorkingSet workingSet) {
        Set<WorkItem> resources = ResourceUtils.getResources(workingSet);
        int markerCount = 0;
        for (WorkItem workItem : resources) {
            markerCount += workItem.getMarkerCount(true);
        }
        return decorateText(text, markerCount);
    }

    public void addListener(ILabelProviderListener listener) {
        // noop
    }

    public void dispose() {
        // noop
    }

    public boolean isLabelProperty(Object element, String property) {
        return true;
    }

    public void removeListener(ILabelProviderListener listener) {
        // noop
    }

}