/* MulticolumnAtom.java
* =========================================================================
* This file is part of the JLaTeXMath Library - http://forge.scilab.org/jlatexmath
*
* Copyright (C) 2010 DENIZET Calixte
*
* 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.
*
* Linking this library statically or dynamically with other modules
* is making a combined work based on this library. Thus, the terms
* and conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce
* an executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under terms
* of your choice, provided that you also meet, for each linked independent
* module, the terms and conditions of the license of that module.
* An independent module is a module which is not derived from or based
* on this library. If you modify this library, you may extend this exception
* to your version of the library, but you are not obliged to do so.
* If you do not wish to do so, delete this exception statement from your
* version.
*
*/
package com.himamis.retex.renderer.share;
/**
* An atom used in array mode to write on several columns.
*/
public class MulticolumnAtom extends Atom {
protected int n;
protected int align;
protected double w = 0;
protected Atom cols;
protected int beforeVlines;
protected int afterVlines;
protected int row, col;
@Override
public Atom duplicate() {
MulticolumnAtom ret = new MulticolumnAtom();
ret.n = n;
ret.align = align;
ret.w = w;
ret.cols = cols;
ret.beforeVlines = beforeVlines;
ret.afterVlines = afterVlines;
ret.row = row;
ret.col = col;
return setFields(ret);
}
public MulticolumnAtom(int n, String align, Atom cols) {
this.n = n >= 1 ? n : 1;
this.cols = cols;
this.align = parseAlign(align);
}
protected MulticolumnAtom() {
}
public void setWidth(double w) {
this.w = w;
}
public int getSkipped() {
return n;
}
public boolean hasRightVline() {
return afterVlines != 0;
}
public void setRowColumn(int i, int j) {
this.row = i;
this.col = j;
}
public int getRow() {
return row;
}
public int getCol() {
return col;
}
private int parseAlign(String str) {
int pos = 0;
int len = str.length();
int align = TeXConstants.ALIGN_CENTER;
boolean first = true;
while (pos < len) {
char c = str.charAt(pos);
switch (c) {
case 'l':
align = TeXConstants.ALIGN_LEFT;
first = false;
break;
case 'r':
align = TeXConstants.ALIGN_RIGHT;
first = false;
break;
case 'c':
align = TeXConstants.ALIGN_CENTER;
first = false;
break;
case '|':
if (first) {
beforeVlines = 1;
} else {
afterVlines = 1;
}
while (++pos < len) {
c = str.charAt(pos);
if (c != '|') {
pos--;
break;
}
if (first) {
beforeVlines++;
} else {
afterVlines++;
}
}
}
pos++;
}
return align;
}
@Override
public Box createBox(TeXEnvironment env) {
Box b;
if (w == 0) {
b = cols.createBox(env);
} else {
b = new HorizontalBox(cols.createBox(env), w, align);
}
b.type = TeXConstants.TYPE_MULTICOLUMN;
return b;
}
}