EDIT

// $Id$

/**

 * Copyright (C) 2007 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.taxeditor.annotatedlineeditor;

import java.util.Iterator;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.jface.text.BadLocationException;

import org.eclipse.jface.text.source.IAnnotationModel;

import org.eclipse.jface.text.source.ISourceViewer;

import org.eclipse.jface.text.source.IVerticalRuler;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.editors.text.TextEditor;

import org.eclipse.ui.texteditor.IDocumentProvider;

import eu.etaxonomy.cdm.api.conversation.ConversationHolder;

import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;

import eu.etaxonomy.cdm.api.service.IOccurrenceService;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;

import eu.etaxonomy.taxeditor.bulkeditor.input.AbstractBulkEditorInput;

import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * A list-based editor, where each line in the editor's document is associated with a domain object.

 * <p>

 * Extending classes must set:

 * <ul>

 * <li>an {@link IEntityPersistenceService} for interacting with the persistence layer; and

 * <li>an {@link ILineDisplayStrategy} for various visual manifestations of the domain object.

 * </ul>

 *

 * @author p.ciardelli

 * @created 25.06.2009

 * @version 1.0

 */

public class AnnotatedLineEditor extends TextEditor implements IConversationEnabled, IPostOperationEnabled {

    protected ConversationHolder conversation;

    private IEntityPersistenceService persistenceService;

    protected ILineDisplayStrategy lineDisplayStrategy;

    /**

     * <p>Constructor for AnnotatedLineEditor.</p>

     *

     * @param conversation a {@link eu.etaxonomy.cdm.api.conversation.ConversationHolder} object.

     */

    public AnnotatedLineEditor(ConversationHolder conversation) {

        this.conversation = conversation;

    }

    /* (non-Javadoc)

     * @see org.eclipse.ui.editors.text.TextEditor#doSetInput(org.eclipse.ui.IEditorInput)

     */

    /** {@inheritDoc} */

    @Override

    protected void doSetInput(IEditorInput input) throws CoreException {

        AnnotatedLineDocumentProvider provider = new AnnotatedLineDocumentProvider(input);

        provider.setLineDisplayStrategy(lineDisplayStrategy, input);

        setDocumentProvider(provider);

        super.doSetInput(input);

    }

    /**

     * <p>Setter for the field <code>persistenceService</code>.</p>

     *

     * @param persistenceService a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.IEntityPersistenceService} object.

     */

    protected void setPersistenceService(

            IEntityPersistenceService persistenceService) {

        this.persistenceService = persistenceService;

    }

    /**

     * <p>Getter for the field <code>persistenceService</code>.</p>

     *

     * @return a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.IEntityPersistenceService} object.

     */

    protected IEntityPersistenceService getPersistenceService() {

        return persistenceService;

    }

    /**

     * <p>Setter for the field <code>lineDisplayStrategy</code>.</p>

     *

     * @param lineDisplayStrategy a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.ILineDisplayStrategy} object.

     */

    protected void setLineDisplayStrategy(

            ILineDisplayStrategy lineDisplayStrategy) {

        this.lineDisplayStrategy = lineDisplayStrategy;

    }

    /** {@inheritDoc} */

    @Override

    protected ISourceViewer createSourceViewer(Composite parent,

            IVerticalRuler ruler, int styles) {

        fAnnotationAccess= getAnnotationAccess();

        fOverviewRuler= createOverviewRuler(getSharedColors());

        LineSelectionViewer viewer = new LineSelectionViewer(parent, ruler, getOverviewRuler(),

                isOverviewRulerVisible(), styles);

        //						isOverviewRulerVisible(), styles | SWT.WRAP);

        getSourceViewerDecorationSupport(viewer);

        return viewer;

    }

    /**

     * Create an annotated line with an "empty" entity, i.e. using the editor

     * input's default entity type and a zero-length title cache.

     *

     * @return a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotation} object.

     */

    public LineAnnotation createAnnotatedLineNewObject() {

        // Create new object

        AnnotatedLineDocumentProvider documentProvider = (AnnotatedLineDocumentProvider) getDocumentProvider();

        IEntityCreator entityCreator = documentProvider.getEntityCreator(getEditorInput());

        Object entity = entityCreator.createEntity(null);

        LineAnnotation annotation = createAnnotatedLine(entity);

        if (annotation != null) {

            annotation.markAsNew(true);

        }

        return annotation;

    }

    /**

     * Create an annotated line, first creating an entity of type "key" - this key

     * must be recognized by the editor's entity creator.

     *

     * @param key a {@link java.lang.Object} object.

     * @param titleCache a {@link java.lang.String} object.

     * @return a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotation} object.

     */

    public LineAnnotation createAnnotatedLineNewObject(Object key, String titleCache) {

        // Create new object

        Object entity = ((AnnotatedLineDocumentProvider) getDocumentProvider()).

                getEntityCreator(getEditorInput()).createEntity(key, titleCache);

        // checks if the creator also saves the entity (in a different conversation), in which case

        // we need to bind back this editors conversation

        // we also need to reload the entity because the conversation used to

        // to create / save the entity may have been closed

        if(entity != null && ((AnnotatedLineDocumentProvider) getDocumentProvider()).getEntityCreator(getEditorInput()).savesEntity()) {

            getConversationHolder().bind();

            //FIXME: why do we use IOccurrenceService here? is this generic?

            //because this method is only invoked by the handler which is used in the

            //specimen bulk editor. This is unsafe and should be refactored!

            Object object = CdmStore.getService(IOccurrenceService.class).load(((CdmBase)entity).getUuid());

            entity = HibernateProxyHelper.deproxy(object);

        }

        if(entity == null) {

            return null;

        }

        LineAnnotation annotation = createAnnotatedLine(entity);

        if (annotation != null) {

            annotation.markAsNew(true);

        }

        return annotation;

    }

    @Override

    public boolean isDirty() {

        return super.isDirty();

    }

    /**

     * Creates an annotated line at the end of the document. The annotation contains the entity.

     *

     * @param entity a {@link java.lang.Object} object.

     * @return a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotation} object.

     */

    public LineAnnotation createAnnotatedLine(Object entity) {

        IEditorInput input = getEditorInput();

        this.conversation.close();

        this.conversation = ((AbstractBulkEditorInput)input).getConversation();

        AnnotatedLineDocumentProvider provider = (AnnotatedLineDocumentProvider) getDocumentProvider();

        LineAnnotation annotation = null;

        try {

            annotation = provider.createAnnotatedLine(input, entity);

            // Jump to new line

            IAnnotationModel model = provider.getAnnotationModel(input);

            if(model != null){

                int start= model.getPosition(annotation).getOffset();

                selectAndReveal(start, 0);

            }

        } catch (BadLocationException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return annotation;

    }

    /**

     * <p>removeAnnotatedLine</p>

     *

     * @param lineno a int.

     */

    public void removeAnnotatedLine(int lineno) {

        ((AnnotatedLineDocumentProvider) getDocumentProvider()).removeAnnotatedLine(lineno);

    }

    /**

     * <p>removeAnnotatedLine</p>

     *

     * @param annotation a {@link eu.etaxonomy.taxeditor.annotatedlineeditor.LineAnnotation} object.

     */

    public void removeAnnotatedLine(LineAnnotation annotation) {

        ((AnnotatedLineDocumentProvider) getDocumentProvider()).removeAnnotatedLine(annotation);

    }

    /* (non-Javadoc)

     * @see org.eclipse.ui.texteditor.AbstractTextEditor#doSave(org.eclipse.core.runtime.IProgressMonitor)

     */

    /** {@inheritDoc} */

    @Override

    public void doSave(IProgressMonitor progressMonitor) {

        if (getConversationHolder() != null) {

            if( ! getConversationHolder().isBound()){

                getConversationHolder().bind();

            }

            super.doSave(progressMonitor);

            getConversationHolder().commit(true);

        } else {

            super.doSave(progressMonitor);

        }

        firePropertyChange(PROP_DIRTY);

    }

    /* (non-Javadoc)

     * @see org.eclipse.ui.texteditor.AbstractTextEditor#setFocus()

     */

    /** {@inheritDoc} */

    @Override

    public void setFocus() {

        super.setFocus();

        if (getConversationHolder() != null) {

            getConversationHolder().bind();

        }

        ((AbstractBulkEditorInput)getEditorInput()).bind();

        PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().setFocus();

        // TODO pass focus to underlying widgets

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.cdm.api.conversation.IConversationEnabled#getConversationHolder()

     */

    /**

     * <p>getConversationHolder</p>

     *

     * @return a {@link eu.etaxonomy.cdm.api.conversation.ConversationHolder} object.

     */

    @Override

    public ConversationHolder getConversationHolder() {

        return conversation;

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.cdm.persistence.hibernate.ICdmPostDataChangeObserver#update(eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap)

     */

    /** {@inheritDoc} */

    @Override

    public void update(CdmDataChangeMap changeEvents) {}

    /**

     * Refreshes text in all lines.

     */

    protected void refreshLineDisplay() {

        IDocumentProvider provider = getDocumentProvider();

        IEditorInput input = getEditorInput();

        IAnnotationModel model = provider.getAnnotationModel(input);

        Iterator iter = getDocumentProvider().getAnnotationModel(getEditorInput()).getAnnotationIterator();

        while (iter.hasNext()) {

            Object next = iter.next();

            if (next instanceof LineAnnotation) {

                LineAnnotation annotation = (LineAnnotation) next;

                ((AnnotatedLineDocumentProvider) getDocumentProvider()).

                updateLineFromAnnotation(annotation);

            }

        }

    }

    /* (non-Javadoc)

     * @see eu.etaxonomy.taxeditor.operations.IPostOperationEnabled#postOperation(eu.etaxonomy.cdm.model.common.CdmBase)

     */

    /** {@inheritDoc} */

    @Override

    public boolean postOperation(CdmBase objectAffectedByOperation) {

        refreshLineDisplay();

        return true;

    }

    /* (non-Javadoc)

     * @see org.eclipse.ui.editors.text.TextEditor#dispose()

     */

    /** {@inheritDoc} */

    @Override

    public void dispose() {

        super.dispose();

        conversation.close();

        ((AbstractBulkEditorInput)getEditorInput()).dispose();

    }

    /**

     * <p>onComplete</p>

     *

     * @return a boolean.

     */

    @Override

    public boolean onComplete() {

        // TODO Auto-generated method stub

        return false;

    }

}