EDIT

// $Id$

/**

 * Copyright (C) 2009 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.editor.definedterm;

import java.util.ArrayList;

import org.apache.commons.lang.StringUtils;

import org.eclipse.jface.viewers.StyledCellLabelProvider;

import org.eclipse.jface.viewers.StyledString;

import org.eclipse.jface.viewers.StyledString.Styler;

import org.eclipse.jface.viewers.ViewerCell;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.StyleRange;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.graphics.TextStyle;

import org.eclipse.swt.widgets.Display;

import eu.etaxonomy.cdm.common.CdmUtils;

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

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

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

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

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

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

/**

 * @author l.morris

 * @date 9 Dec 2011

 *

 */

public class TermLabelProvider extends StyledCellLabelProvider {

    private static Color vocColor = Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);

    private Styler vocStyler;

    public TermLabelProvider() {

    }

    public TermLabelProvider(Styler vocStyler){

        this.vocStyler = vocStyler;

    }

    /*

     * (non-Javadoc)

     *

     * @see

     * org.eclipse.jface.viewers.StyledCellLabelProvider#update(org.eclipse.

     * jface.viewers.ViewerCell)

     */

    @Override

    public void update(ViewerCell cell) {

        Object element = cell.getElement();

        int columnIndex = cell.getColumnIndex();

        String text = getText(element);

        cell.setText(text);

        if (element instanceof TermVocabulary) {

            StyledString styledString = new StyledString(text, getVocabularyStyler());

            StyleRange[] styleRanges;

            styleRanges = styledString.getStyleRanges();

            cell.setStyleRanges(styleRanges);

        }

        super.update(cell);

    }

    public StyledString getStyledText(Object element) {

        if (element instanceof TermVocabulary) {

            new StyledString(getText(element), getVocabularyStyler());

        }

        return new StyledString(getText(element), StyledString.QUALIFIER_STYLER);

    }

    public String getText(Object element) {

        if (element instanceof DefinedTermBase) {

            DefinedTermBase<?> dtb = (DefinedTermBase<?>) element;

            Representation rep = dtb.getRepresentation(PreferencesUtil.getGlobalLanguage());

            if ( rep == null){

                rep = dtb.getPreferredRepresentation(new ArrayList<Language>());

            }

            String label = rep != null? rep.getLabel() : dtb.getTitleCache();

            return CdmUtils.concat(" : ", dtb.getIdInVocabulary(), label);

        } else if (element instanceof TermBase) {

            return ((TermBase) element).getTitleCache();

        }

        // FIXME : must throw an exception here

        return element.toString();

    }

    private Styler getVocabularyStyler() {

        if (vocStyler == null) {

            vocStyler = new Styler() {

                @Override

                public void applyStyles(TextStyle textStyle) {

                    textStyle.foreground = vocColor;

                }

            };

        }

        return vocStyler;

    }

}