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/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.debug.internal.ui.views.breakpoints;

import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.internal.ui.CompositeDebugImageDescriptor;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.IDebugModelPresentation;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.model.WorkbenchLabelProvider;

/**
 * Label provider for the breakpoints view
 */
public class BreakpointsLabelProvider extends LabelProvider implements IFontProvider {

    private WorkbenchLabelProvider fWorkbenchLabelProvider;
    private IDebugModelPresentation fPresentation;

    /**
     * Constructs a new label provide for the breakpoints view.
     */
    public BreakpointsLabelProvider() {
        fWorkbenchLabelProvider = new WorkbenchLabelProvider();
        fPresentation = DebugUITools.newDebugModelPresentation();
    }

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

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
     */
    @Override
	public Image getImage(Object element) {
        if (element instanceof IBreakpoint) {
            return fPresentation.getImage(element);
        }
        Image image = fWorkbenchLabelProvider.getImage(element);
        if (image != null) {
            int flags= computeAdornmentFlags();
            if (flags > 0) {
                CompositeDebugImageDescriptor descriptor= new CompositeDebugImageDescriptor(image, flags);
                return DebugUIPlugin.getImageDescriptorRegistry().get(descriptor);
            }
        }
        return image;
    }

	/**
     * Computes and return common adornment flags for the given category.
     *
     * @return adornment flags defined in CompositeDebugImageDescriptor
     */
    private int computeAdornmentFlags() {
        if (!DebugPlugin.getDefault().getBreakpointManager().isEnabled()) {
            return CompositeDebugImageDescriptor.SKIP_BREAKPOINT;
        }
        return 0;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
     */
    @Override
	public String getText(Object element) {
        if (element instanceof IBreakpoint) {
            return fPresentation.getText(element);
        }
        return fWorkbenchLabelProvider.getText(element);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.IFontProvider#getFont(java.lang.Object)
     */
    @Override
	public Font getFont(Object element) {
        if (element instanceof IBreakpoint) {
            return null;
        }
        return fWorkbenchLabelProvider.getFont(element);
    }

    /**
     * Returns the debug model presentation used by this label provider.
     *
     * @return the debug model presentation used by this label provider
     */
    public IDebugModelPresentation getPresentation() {
        return fPresentation;
    }
}

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