de.walware.statet.r.internal.debug.ui.preferences.REnvLabelProvider.java Source code

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Here is the source code for de.walware.statet.r.internal.debug.ui.preferences.REnvLabelProvider.java

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/*=============================================================================#
 # Copyright (c) 2010-2015 Stephan Wahlbrink (WalWare.de) 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:
 #     Stephan Wahlbrink - initial API and implementation
 #=============================================================================*/

package de.walware.statet.r.internal.debug.ui.preferences;

import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.DecorationOverlayIcon;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;

import de.walware.ecommons.ui.SharedUIResources;

import de.walware.statet.r.core.renv.IREnvConfiguration;
import de.walware.statet.r.ui.RUI;

public class REnvLabelProvider extends ColumnLabelProvider {

    private final IObservableValue fDefault;

    private Image fEnvIcon;
    private Image fEnvDefaultIcon;
    private Image fEnvRemoteIcon;
    private Image fEnvRemoteDefaultIcon;

    public REnvLabelProvider(final IObservableValue defaultValue) {
        fDefault = defaultValue;
    }

    private Image createIcon(final Image baseImage) {
        return new DecorationOverlayIcon(baseImage, new ImageDescriptor[] { null, null, null, null, null },
                new Point(baseImage.getBounds().width + 4, baseImage.getBounds().height)).createImage();
    }

    private Image createDefaultIcon(final Image baseImage) {
        return new DecorationOverlayIcon(baseImage, new ImageDescriptor[] { null, null, null,
                SharedUIResources.getImages().getDescriptor(SharedUIResources.OVR_DEFAULT_MARKER_IMAGE_ID), null },
                new Point(baseImage.getBounds().width + 4, baseImage.getBounds().height)).createImage();
    }

    @Override
    public void dispose() {
        if (fEnvIcon != null) {
            fEnvIcon.dispose();
            fEnvIcon = null;
        }
        if (fEnvDefaultIcon != null) {
            fEnvDefaultIcon.dispose();
            fEnvDefaultIcon = null;
        }
        if (fEnvRemoteIcon != null) {
            fEnvRemoteIcon.dispose();
            fEnvRemoteIcon = null;
        }
        if (fEnvRemoteDefaultIcon != null) {
            fEnvRemoteDefaultIcon.dispose();
            fEnvRemoteDefaultIcon = null;
        }
    }

    @Override
    public Image getImage(final Object element) {
        final IREnvConfiguration config = (IREnvConfiguration) element;
        if (config.getType() == IREnvConfiguration.USER_REMOTE_TYPE) {
            if (fDefault.getValue() == config) {
                if (fEnvRemoteDefaultIcon == null) {
                    fEnvRemoteDefaultIcon = createDefaultIcon(RUI.getImage(RUI.IMG_OBJ_R_REMOTE_ENV));
                }
                return fEnvRemoteDefaultIcon;
            } else {
                if (fEnvRemoteIcon == null) {
                    fEnvRemoteIcon = createIcon(RUI.getImage(RUI.IMG_OBJ_R_REMOTE_ENV));
                }
                return fEnvRemoteIcon;
            }
        } else {
            if (fDefault.getValue() == config) {
                if (fEnvDefaultIcon == null) {
                    fEnvDefaultIcon = createDefaultIcon(RUI.getImage(RUI.IMG_OBJ_R_RUNTIME_ENV));
                }
                return fEnvDefaultIcon;
            } else {
                if (fEnvIcon == null) {
                    fEnvIcon = createIcon(RUI.getImage(RUI.IMG_OBJ_R_RUNTIME_ENV));
                }
                return fEnvIcon;
            }
        }
    }

    @Override
    public String getText(final Object element) {
        final IREnvConfiguration config = (IREnvConfiguration) element;
        return config.getName();
    }

}