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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.model;
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import org.eclipse.swt.graphics.GC;
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import org.eclipse.swt.widgets.Control;
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/**
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* <p>TextHelper class.</p>
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*
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* @author n.hoffmann
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* @created Mar 30, 2010
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* @version 1.0
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*/
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public class TextHelper {
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/** Constant <code>ELLIPSIS="..."</code> */
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public static final String ELLIPSIS = "...";
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/**
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* <p>shortenText</p>
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*
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* @param textValue a {@link java.lang.String} object.
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* @param control a {@link org.eclipse.swt.widgets.Control} object.
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* @see org.eclipse.jface.dialogs.Dialog#shortenText(String, Control)
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* @return a {@link java.lang.String} object.
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*/
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public static String shortenText(String textValue, Control control) {
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if (textValue == null) {
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return null;
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}
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GC gc = new GC(control);
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int maxWidth = control.getBounds().width;
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int maxExtent = gc.textExtent(textValue).x;
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if (maxExtent < maxWidth) {
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gc.dispose();
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return textValue;
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}
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int length = textValue.length();
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int charsToClip = Math.round(0.95f*length * (1 - ((float)maxWidth/maxExtent)));
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int end = length - charsToClip;
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while (end > 0) {
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String s1 = textValue.substring(0, end);
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String s = s1 + ELLIPSIS;
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int l = gc.textExtent(s).x;
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if (l < maxWidth) {
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gc.dispose();
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return s;
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}
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end--;
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}
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gc.dispose();
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return textValue;
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}
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}
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