/*******************************************************************************
 * Copyright (c) 2008 ARM Limited 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:
 * ARM Limited - Initial API and implementation
 *******************************************************************************/

package org.eclipse.cdt.debug.internal.ui.disassembly.viewer;

import org.eclipse.cdt.debug.ui.disassembly.IDocumentElementAnnotationProvider;
import org.eclipse.cdt.debug.ui.disassembly.IDocumentPresentation;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.ui.progress.UIJob;

/**
 * org.eclipse.cdt.debug.internal.ui.disassembly.viewer.DocumentAnnotationProvider: 
 * //TODO Add description.
 */
public class DocumentAnnotationProvider {

    private VirtualDocument fDocument;

    public DocumentAnnotationProvider( VirtualDocument document ) {
        fDocument = document;
    }

    public void dispose() {
        fDocument = null;
    }

    public void update( Object parent, Object[] elements, IDocumentPresentation context ) {
        IDocumentElementAnnotationProvider annotationProvider = getAnnotationAdapter( parent );
        if ( annotationProvider != null ) {
            Object root = getDocument().getContentProvider().getRoot();
            Object base = getDocument().getContentProvider().getBase();
            DocumentAnnotationUpdate[] updates = new DocumentAnnotationUpdate[elements.length];
            for ( int i = 0; i < elements.length; ++i ) {
                updates[i] = new DocumentAnnotationUpdate( this, context, root, base, elements[i], i );
            }
            annotationProvider.update( updates );
        }
    }

    public void update( Object parent, Object element, int index, IDocumentPresentation context ) {
        IDocumentElementAnnotationProvider annotationProvider = getAnnotationAdapter( element );
        if ( annotationProvider != null ) {
            Object root = getDocument().getContentProvider().getRoot();
            Object base = getDocument().getContentProvider().getBase();
            annotationProvider.update( new DocumentAnnotationUpdate[] { new DocumentAnnotationUpdate( this, context, root, base, element, index ) } );
        }
    }

    public void completed( DocumentAnnotationUpdate update ) {
        if ( update.isCanceled() )
            return;
        
        final int index = update.getIndex();
        final Annotation[] annotations = update.getAnnotations();
        UIJob uiJob = new UIJob( "Add annotations" ) { //$NON-NLS-1$
            
            /* (non-Javadoc)
             * @see org.eclipse.ui.progress.UIJob#runInUIThread(org.eclipse.core.runtime.IProgressMonitor)
             */
            @Override
            public IStatus runInUIThread( IProgressMonitor monitor ) {
                VirtualDocument document = getDocument();
                if ( document != null ) {
                    getDocument().updateAnnotations( index, annotations );
                }
                return Status.OK_STATUS;
            }
        };
        uiJob.setSystem( true );
        uiJob.schedule();
    }

    protected IDocumentElementAnnotationProvider getAnnotationAdapter( Object element ) {
        IDocumentElementAnnotationProvider adapter = null;
        if ( element instanceof IDocumentElementAnnotationProvider ) {
            adapter = (IDocumentElementAnnotationProvider)element;
        }
        else if ( element instanceof IAdaptable ) {
            IAdaptable adaptable = (IAdaptable)element;
            adapter = (IDocumentElementAnnotationProvider)adaptable.getAdapter( IDocumentElementAnnotationProvider.class );
        }
        return adapter;
    }

    protected VirtualDocument getDocument() {
        return fDocument;
    }
}