ext.org.eclipse.jdt.internal.ui.wizards.buildpaths.CPVariableElementLabelProvider.java Source code

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Here is the source code for ext.org.eclipse.jdt.internal.ui.wizards.buildpaths.CPVariableElementLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package ext.org.eclipse.jdt.internal.ui.wizards.buildpaths;

import java.util.ArrayList;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

import org.eclipse.core.runtime.IPath;

import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.viewers.DecorationOverlayIcon;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import patch.org.eclipse.jdt.internal.ui.JavaPlugin;

import ext.org.eclipse.jdt.internal.corext.util.Messages;
import ext.org.eclipse.jdt.internal.ui.JavaPluginImages;
import ext.org.eclipse.jdt.internal.ui.viewsupport.BasicElementLabels;
import ext.org.eclipse.jdt.internal.ui.wizards.NewWizardMessages;

public class CPVariableElementLabelProvider extends LabelProvider implements IColorProvider {

    // shared, do not dispose:
    private Image fJARImage;
    private Image fFolderImage;
    private Color fResolvedBackground;

    private Image fDeprecatedJARImage;
    private Image fDeprecatedFolderImage;

    private boolean fHighlightReadOnly;

    public CPVariableElementLabelProvider(boolean highlightReadOnly) {
        ImageRegistry reg = JavaPlugin.getDefault().getImageRegistry();
        fJARImage = reg.get(JavaPluginImages.IMG_OBJS_EXTJAR);
        fFolderImage = PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_FOLDER);

        fDeprecatedJARImage = new DecorationOverlayIcon(fJARImage, JavaPluginImages.DESC_OVR_DEPRECATED,
                IDecoration.TOP_LEFT).createImage();
        fDeprecatedFolderImage = new DecorationOverlayIcon(fFolderImage, JavaPluginImages.DESC_OVR_DEPRECATED,
                IDecoration.TOP_LEFT).createImage();

        fHighlightReadOnly = highlightReadOnly;
        fResolvedBackground = null;
    }

    /*
     * @see LabelProvider#getImage(java.lang.Object)
     */
    @Override
    public Image getImage(Object element) {
        if (element instanceof CPVariableElement) {
            CPVariableElement curr = (CPVariableElement) element;
            IPath path = curr.getPath();
            if (path.toFile().isFile()) {
                return curr.isDeprecated() ? fDeprecatedJARImage : fJARImage;
            }
            return curr.isDeprecated() ? fDeprecatedFolderImage : fFolderImage;
        }
        return super.getImage(element);
    }

    /*
     * @see LabelProvider#getText(java.lang.Object)
     */
    @Override
    public String getText(Object element) {
        if (element instanceof CPVariableElement) {
            CPVariableElement curr = (CPVariableElement) element;
            String name = curr.getName();
            IPath path = curr.getPath();

            String result = name;
            ArrayList<String> restrictions = new ArrayList<String>(2);

            if (curr.isReadOnly() && fHighlightReadOnly) {
                restrictions.add(NewWizardMessages.CPVariableElementLabelProvider_read_only);
            }
            if (curr.isDeprecated()) {
                restrictions.add(NewWizardMessages.CPVariableElementLabelProvider_deprecated);
            }
            if (restrictions.size() == 1) {
                result = Messages.format(NewWizardMessages.CPVariableElementLabelProvider_one_restriction,
                        new Object[] { result, restrictions.get(0) });
            } else if (restrictions.size() == 2) {
                result = Messages.format(NewWizardMessages.CPVariableElementLabelProvider_two_restrictions,
                        new Object[] { result, restrictions.get(0), restrictions.get(1) });
            }

            if (path != null) {
                String appendix;
                if (!path.isEmpty()) {
                    appendix = BasicElementLabels.getPathLabel(path, true);
                } else {
                    appendix = NewWizardMessages.CPVariableElementLabelProvider_empty;
                }
                result = Messages.format(NewWizardMessages.CPVariableElementLabelProvider_appendix,
                        new Object[] { result, appendix });
            }

            return result;
        }

        return super.getText(element);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IColorProvider#getForeground(java.lang.Object)
     */
    public Color getForeground(Object element) {
        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IColorProvider#getBackground(java.lang.Object)
     */
    public Color getBackground(Object element) {
        if (element instanceof CPVariableElement) {
            CPVariableElement curr = (CPVariableElement) element;
            if (fHighlightReadOnly && curr.isReadOnly()) {
                if (fResolvedBackground == null) {
                    Display display = Display.getCurrent();
                    fResolvedBackground = display.getSystemColor(SWT.COLOR_INFO_BACKGROUND);
                }
                return fResolvedBackground;
            }
        }
        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
     */
    @Override
    public void dispose() {
        super.dispose();
        fDeprecatedFolderImage.dispose();
        fDeprecatedJARImage.dispose();
    }

}