| 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 | } |