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/* PresentationElementParser.java
* =========================================================================
* This file is part of the JMathTeX Library - http://jmathtex.sourceforge.net
*
* Copyright (C) 2004-2007 Universiteit Gent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*/
package be.ugent.caagt.jmathtex.mathml;
import org.jdom.Element;
import be.ugent.caagt.jmathtex.TeXConstants;
import be.ugent.caagt.jmathtex.TeXFormula;
abstract class PresentationElementParser {
/**
* Space between base and underscript/overscript, if marked as accent.
* Used by elements "mover", "munder" and "munderover"
*/
protected static final float ACC_SPACE = 0.2f;
/**
* unit used for ACC_SPACE en LIM_SPACE ("munderover")
*/
protected static final int ACC_LIM_UNIT = TeXConstants.UNIT_EX;
/**
* Parses the given element and transforms it into a TeXFormula, using the
* given rendering environment.
*
* @param el the element to be parsed and transformed into a TeXFormula
* @param env the rendering environment for the given element
* @return the transformed TeXFormula
* @throws MathMLException if the MathML syntax wasn't correct
*/
public abstract TeXFormula buildFormula(Element el, Environment env)
throws MathMLException;
/**
* Gets the string content of the given MathML token element, removes all leading
* and trailing whitespace, normalizes internal whitespace (according to the MathML
* specification), replaces remaining internal whitespace by the special "\nbsp"
* JmathTeX command (a hard space) and replaces all unicode characters in the string
* with their TeX mapping (if defined).
*
* @param el a MathML token element
* @return the string content of the given element, with all whitespace normalized
* and all unicode characters replaced with their TeX mapping (if defined)
*/
protected String convertMathMLToTeX(Element el) {
String mathMLString = el.getTextNormalize();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < mathMLString.length(); i++) {
char ch = mathMLString.charAt(i);
if (ch == ' ') // space not to be ignored!!
buf.append("\\nbsp");
else {
Object mapping = MathMLParser.getUnicodeMapping(ch);
if (mapping == null)
buf.append(ch);
else
buf.append("{" + (String) mapping + "}");
}
}
return buf.toString();
}
}
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