com.opcoach.e4.contextExplorer.parts.ContextTreeProvider.java Source code

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Here is the source code for com.opcoach.e4.contextExplorer.parts.ContextTreeProvider.java

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/*******************************************************************************
 * Copyright (c) 2013 OPCoach.
 * 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:
 *     OPCoach - initial API and implementation
 *******************************************************************************/
package com.opcoach.e4.contextExplorer.parts;

import java.util.Collection;

import javax.inject.Inject;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.internal.contexts.EclipseContext;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;

import com.opcoach.e4.contextExplorer.search.ContextRegistry;

public class ContextTreeProvider extends LabelProvider implements ITreeContentProvider, IColorProvider {

    @Inject
    private ContextRegistry contextRegistry;

    @Inject
    public ContextTreeProvider() {

    }

    @Override
    public void dispose() {
        // TODO Auto-generated method stub

    }

    @Override
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        // TODO Auto-generated method stub

    }

    @Override
    public Object[] getElements(Object inputElement) {
        if (inputElement instanceof MApplication) {
            return new Object[] { ((MApplication) inputElement).getContext().getParent() };
        } else if (inputElement instanceof Collection<?>) {
            return ((Collection<?>) inputElement).toArray();
        }

        return new Object[0];
    }

    @Override
    public Object[] getChildren(Object parentElement) {
        if (parentElement instanceof EclipseContext) {
            return ((EclipseContext) parentElement).getChildren().toArray();
        }
        return null;
    }

    @Override
    public Object getParent(Object element) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public boolean hasChildren(Object element) {
        return ((element instanceof EclipseContext) && !(((EclipseContext) element).getChildren().isEmpty()));
    }

    @Override
    public String getText(Object element) {
        return super.getText(element);
    }

    @Override
    public Color getForeground(Object element) {
        // Return a color if a text contained in this node containes the text.
        if (element instanceof IEclipseContext && contextRegistry.containsText((IEclipseContext) element)) {
            return Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);
        }
        return null;
    }

    @Override
    public Color getBackground(Object element) {
        return null;
    }

}