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/* SymbolAtom.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;
import java.util.BitSet;
import java.util.Map;
/**
* A box representing a symbol (a non-alphanumeric character).
*/
class SymbolAtom extends CharSymbol {
// whether it's is a delimiter symbol
private final boolean delimiter;
// symbol name
private final String name;
// contains all defined symbols
private static Map<String,SymbolAtom> symbols;
// contains all the possible valid symbol types
private static BitSet validSymbolTypes;
static {
symbols = new TeXSymbolParser().readSymbols();
// set valid symbol types
validSymbolTypes = new BitSet(16);
validSymbolTypes.set(TeXConstants.TYPE_ORDINARY);
validSymbolTypes.set(TeXConstants.TYPE_BIG_OPERATOR);
validSymbolTypes.set(TeXConstants.TYPE_BINARY_OPERATOR);
validSymbolTypes.set(TeXConstants.TYPE_RELATION);
validSymbolTypes.set(TeXConstants.TYPE_OPENING);
validSymbolTypes.set(TeXConstants.TYPE_CLOSING);
validSymbolTypes.set(TeXConstants.TYPE_PUNCTUATION);
validSymbolTypes.set(TeXConstants.TYPE_ACCENT);
}
public SymbolAtom(SymbolAtom s, int type) throws InvalidSymbolTypeException {
if (!validSymbolTypes.get(type))
throw new InvalidSymbolTypeException(
"The symbol type was not valid! "
+ "Use one of the symbol type constants from the class 'TeXConstants'.");
name = s.name;
this.type = type;
delimiter = s.delimiter;
}
/**
* Constructs a new symbol. This used by "TeXSymbolParser" and the symbol
* types are guaranteed to be valid.
*
* @param name symbol name
* @param type symbol type constant
* @param del whether the symbol is a delimiter
*/
public SymbolAtom(String name, int type, boolean del) {
this.name = name;
this.type = type;
delimiter = del;
}
/**
* Looks up the name in the table and returns the corresponding SymbolAtom representing
* the symbol (if it's found).
*
* @param name the name of the symbol
* @return a SymbolAtom representing the found symbol
* @throws SymbolNotFoundException if no symbol with the given name was found
*/
public static SymbolAtom get(String name) throws SymbolNotFoundException {
Object obj = symbols.get(name);
if (obj == null) // not found
throw new SymbolNotFoundException(name);
else
return (SymbolAtom) obj;
}
/**
*
* @return true if this symbol can act as a delimiter to embrace formulas
*/
public boolean isDelimiter() {
return delimiter;
}
public String getName() {
return name;
}
public Box createBox(TeXEnvironment env) {
TeXFont tf = env.getTeXFont();
int style = env.getStyle();
return new CharBox(tf.getChar(name, style));
}
public CharFont getCharFont(TeXFont tf) {
// style doesn't matter here
return tf.getChar(name, TeXConstants.STYLE_DISPLAY).getCharFont();
}
}
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