1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
2 | * |
3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
4 | * |
5 | * "Hilbert II" is free software; you can redistribute |
6 | * it and/or modify it under the terms of the GNU General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | */ |
15 | |
16 | package org.qedeq.kernel.bo.service.internal; |
17 | |
18 | import java.util.ArrayList; |
19 | import java.util.List; |
20 | |
21 | import org.apache.commons.lang.ArrayUtils; |
22 | import org.qedeq.base.utility.StringUtility; |
23 | import org.qedeq.kernel.bo.common.Element2Utf8; |
24 | import org.qedeq.kernel.bo.service.unicode.Latex2UnicodeParser; |
25 | import org.qedeq.kernel.se.base.list.Element; |
26 | |
27 | |
28 | /** |
29 | * Transfer a QEDEQ formulas into UTF-8 text. |
30 | * |
31 | * @author Michael Meyling |
32 | */ |
33 | public final class Element2Utf8Impl implements Element2Utf8 { |
34 | |
35 | /** We use this converter. */ |
36 | private Element2LatexImpl converter; |
37 | |
38 | /** |
39 | * Constructor. |
40 | * |
41 | * @param converter This converter can produce at least LaTeX. |
42 | */ |
43 | public Element2Utf8Impl(final Element2LatexImpl converter) { |
44 | this.converter = converter; |
45 | } |
46 | |
47 | public String getUtf8(final Element element) { |
48 | return getUtf8(element, 0)[0]; |
49 | } |
50 | |
51 | public String[] getUtf8(final Element element, final int maxCols) { |
52 | final String result = Latex2UnicodeParser.transform(null, converter.getLatex(element), 0); |
53 | if (maxCols <= 0 || result.length() < maxCols) { |
54 | return new String[] {result}; |
55 | } |
56 | final List list = new ArrayList(); |
57 | int index = 0; |
58 | while (index < result.length()) { |
59 | list.add(StringUtility.substring(result, index, maxCols)); |
60 | index += maxCols; |
61 | } |
62 | return (String[]) list.toArray(ArrayUtils.EMPTY_STRING_ARRAY); |
63 | } |
64 | |
65 | } |