org.eclipse.tcf.te.ui.views.navigator.DelegatingLabelProvider.java Source code

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Here is the source code for org.eclipse.tcf.te.ui.views.navigator.DelegatingLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2011, 2013 Wind River Systems, Inc. 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:
 * Wind River Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.tcf.te.ui.views.navigator;

import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.tcf.te.runtime.services.interfaces.delegates.ILabelProviderDelegate;
import org.eclipse.tcf.te.ui.views.extensions.LabelProviderDelegateExtensionPointManager;
import org.eclipse.ui.navigator.IDescriptionProvider;

/**
 * Label provider implementation.
 */
public class DelegatingLabelProvider extends LabelProvider
        implements ILabelDecorator, ILabelProviderDelegate, IDescriptionProvider, IColorProvider, IFontProvider {

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object)
     */
    @Override
    public String getText(final Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                String text = delegate.getText(element);
                if (text != null) {
                    return text;
                }
            }
        }

        return super.getText(element);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
     */
    @Override
    public Image getImage(final Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                Image image = delegate.getImage(element);
                if (image != null) {
                    return image;
                }
            }
        }

        return super.getImage(element);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelDecorator#decorateImage(org.eclipse.swt.graphics.Image, java.lang.Object)
     */
    @Override
    public Image decorateImage(Image image, Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof ILabelDecorator) {
                    Image candidate = ((ILabelDecorator) delegate).decorateImage(image, element);
                    if (candidate != null && candidate != image) {
                        return candidate;
                    }
                }
            }
        }

        return image;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelDecorator#decorateText(java.lang.String, java.lang.Object)
     */
    @Override
    public String decorateText(final String text, final Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof ILabelDecorator) {
                    String candidate = ((ILabelDecorator) delegate).decorateText(text, element);
                    if (candidate != null) {
                        return candidate;
                    }
                }
            }
        }

        return text;
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.navigator.IDescriptionProvider#getDescription(java.lang.Object)
     */
    @Override
    public String getDescription(Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        String description = null;

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof IDescriptionProvider) {
                    String candidate = ((IDescriptionProvider) delegate).getDescription(element);
                    if (candidate != null) {
                        description = candidate;
                        break;
                    }
                }
            }
        }

        return decorateText(getText(element), element) + (description != null ? " - " + description : ""); //$NON-NLS-1$ //$NON-NLS-2$
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IFontProvider#getFont(java.lang.Object)
     */
    @Override
    public Font getFont(Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof IFontProvider) {
                    Font candidate = ((IFontProvider) delegate).getFont(element);
                    if (candidate != null) {
                        return candidate;
                    }
                }
            }
        }

        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IColorProvider#getForeground(java.lang.Object)
     */
    @Override
    public Color getForeground(Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof IColorProvider) {
                    Color candidate = ((IColorProvider) delegate).getForeground(element);
                    if (candidate != null) {
                        return candidate;
                    }
                }
            }
        }

        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IColorProvider#getBackground(java.lang.Object)
     */
    @Override
    public Color getBackground(Object element) {
        ILabelProvider[] delegates = LabelProviderDelegateExtensionPointManager.getInstance().getDelegates(element,
                false);

        if (delegates != null && delegates.length > 0) {
            for (ILabelProvider delegate : delegates) {
                if (delegate instanceof IColorProvider) {
                    Color candidate = ((IColorProvider) delegate).getBackground(element);
                    if (candidate != null) {
                        return candidate;
                    }
                }
            }
        }

        return null;
    }
}