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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.key.polytomous;
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import org.eclipse.jface.viewers.StyledCellLabelProvider;
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import org.eclipse.jface.viewers.StyledString;
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import org.eclipse.jface.viewers.StyledString.Styler;
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import org.eclipse.jface.viewers.ViewerCell;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.custom.StyleRange;
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import org.eclipse.swt.graphics.Color;
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import org.eclipse.swt.graphics.TextStyle;
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import org.eclipse.swt.widgets.Display;
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import eu.etaxonomy.cdm.common.CdmUtils;
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import eu.etaxonomy.cdm.model.description.KeyStatement;
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import eu.etaxonomy.cdm.model.description.PolytomousKeyNode;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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/**
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* @author n.hoffmann
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* @created Apr 18, 2011
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* @version 1.0
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*/
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public class PolytomousKeyListLabelProvider extends StyledCellLabelProvider {
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private static Color colorLink = Display.getCurrent().getSystemColor(
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SWT.COLOR_BLUE);
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private Styler styler;
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private static final String EMPTY = "";
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// TODO make this configurable via preferences
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private static final String INCREMENTOR_CHARACTER = "'";
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/*
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* (non-Javadoc)
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*
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* @see
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* org.eclipse.jface.viewers.StyledCellLabelProvider#update(org.eclipse.
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* jface.viewers.ViewerCell)
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*/
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@Override
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public void update(ViewerCell cell) {
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Object element = cell.getElement();
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int columnIndex = cell.getColumnIndex();
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if (element instanceof PolytomousKeyNode) {
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String text = getTextForColumnIndex((PolytomousKeyNode) element,
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columnIndex);
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cell.setText(text);
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if (columnIndex == 3 || columnIndex == 4) {
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StyledString styledString = new StyledString(text, getStyler());
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StyleRange[] styleRanges;
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styleRanges = styledString.getStyleRanges();
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cell.setStyleRanges(styleRanges);
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}
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}
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super.update(cell);
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}
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private String getTextForColumnIndex(PolytomousKeyNode node, int columnIndex) {
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switch (columnIndex) {
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case 0:
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return getItemNumber(node);
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case 1:
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return getItemQuestion(node);
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case 2:
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return getItemStatement(node);
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case 3:
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return getItemLink(node);
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case 4:
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return getItemTaxon(node);
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}
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return EMPTY;
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}
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/**
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* @return
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*/
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private Styler getStyler() {
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if (styler == null) {
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styler = new Styler() {
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@Override
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public void applyStyles(TextStyle textStyle) {
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textStyle.underline = true;
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textStyle.underlineColor = colorLink;
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textStyle.foreground = colorLink;
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textStyle.underlineStyle = SWT.UNDERLINE_SINGLE;
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}
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};
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}
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return styler;
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}
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private String getItemNumber(PolytomousKeyNode node) {
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if (isParentRoot(node)) {
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return "root";
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} else {
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PolytomousKeyNode parent = getParent(node);
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String itemNumber = parent.getNodeNumber() != null ? parent
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.getNodeNumber().toString() : EMPTY;
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int index = parent.getChildren().indexOf(node);
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for (int i = 0; i < index; i++) {
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itemNumber += INCREMENTOR_CHARACTER;
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}
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return itemNumber;
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}
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}
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private String getItemQuestion(PolytomousKeyNode node) {
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if (isParentRoot(node)) {
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return "";
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} else {
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KeyStatement question = getParent(node).getQuestion();
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return question != null ? question.getLabelText(CdmStore
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.getDefaultLanguage()) : EMPTY;
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}
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}
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private String getItemStatement(PolytomousKeyNode node) {
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KeyStatement statement = node.getStatement();
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return statement != null ? CdmUtils.Nz(statement.getLabelText(CdmStore
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.getDefaultLanguage())) : EMPTY;
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}
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private String getItemLink(PolytomousKeyNode node) {
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String linkString = node.getChildren().isEmpty() ? EMPTY : node.getNodeNumber().toString();
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return linkString;
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}
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private String getItemTaxon(PolytomousKeyNode node) {
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String taxonString = node.getTaxon() != null ? node.getTaxon().getName().getTitleCache() : EMPTY;
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return taxonString;
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}
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private PolytomousKeyNode getParent(PolytomousKeyNode node) {
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return node.getParent();
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}
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private boolean isParentRoot(PolytomousKeyNode node) {
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return getParent(node) == null;
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}
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}
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