coloredide.astview.internal.TrayLabelProvider.java Source code

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Here is the source code for coloredide.astview.internal.TrayLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2000, 2005 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 coloredide.astview.internal;

import org.eclipse.jdt.core.Signature;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

public class TrayLabelProvider extends LabelProvider implements IColorProvider {

    private Color fBlue, fRed;
    private Color fWidgetForeground;

    private Object fViewerElement;

    public TrayLabelProvider() {
        Display display = Display.getCurrent();

        fRed = display.getSystemColor(SWT.COLOR_RED);
        fBlue = display.getSystemColor(SWT.COLOR_DARK_BLUE);
        fWidgetForeground = display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND);
    }

    public void setViewerElement(Object viewerElement) {
        if (fViewerElement != viewerElement) {
            fViewerElement = viewerElement;
            fireLabelProviderChanged(new LabelProviderChangedEvent(this));
        }
    }

    public String getText(Object obj) {
        if (obj instanceof DynamicBindingProperty) {
            DynamicBindingProperty dynamicBindingProperty = (DynamicBindingProperty) obj;
            dynamicBindingProperty
                    .setViewerElement(fViewerElement instanceof Binding ? (Binding) fViewerElement : null);
            return dynamicBindingProperty.getLabel();
        } else if (obj instanceof DynamicAttributeProperty) {
            DynamicAttributeProperty dynamicAttributeProperty = (DynamicAttributeProperty) obj;
            dynamicAttributeProperty.setViewerElement(fViewerElement);
            return dynamicAttributeProperty.getLabel();
        } else if (obj instanceof ASTAttribute) {
            return ((ASTAttribute) obj).getLabel();
        } else if (obj instanceof ASTNode) {
            return Signature.getSimpleName(((ASTNode) obj).getClass().getName());
        } else {
            return ""; // https://bugs.eclipse.org/bugs/show_bug.cgi?id=126017
        }
    }

    public Image getImage(Object obj) {
        if (obj instanceof DynamicBindingProperty) {
            DynamicBindingProperty dynamicBindingProperty = (DynamicBindingProperty) obj;
            dynamicBindingProperty
                    .setViewerElement(fViewerElement instanceof Binding ? (Binding) fViewerElement : null);
            return dynamicBindingProperty.getImage();
        } else if (obj instanceof DynamicAttributeProperty) {
            DynamicAttributeProperty dynamicAttributeProperty = (DynamicAttributeProperty) obj;
            dynamicAttributeProperty.setViewerElement(fViewerElement);
            return dynamicAttributeProperty.getImage();
        } else if (obj instanceof ASTAttribute) {
            return ((ASTAttribute) obj).getImage();
        } else {
            return null;
        }
    }

    /*
     * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
     */
    public void dispose() {
        super.dispose();
        fViewerElement = null;
    }

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

        } else if (element instanceof ExceptionAttribute) {
            if (element instanceof DynamicBindingProperty) {
                ((DynamicBindingProperty) element)
                        .setViewerElement(fViewerElement instanceof Binding ? (Binding) fViewerElement : null);
            } else if (element instanceof DynamicAttributeProperty) {
                ((DynamicAttributeProperty) element).setViewerElement(fViewerElement);
            }

            if (((ExceptionAttribute) element).getException() == null)
                //            return null; //Bug 75022: Does not work when label is updated (retains old color, doesn't get default)
                //TODO remove hackaround when bug 75022 is fixed
                return fWidgetForeground;
            else
                return fRed;

        } else {
            return null; // normal color
        }
    }

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

}