/* OverUnderBox.java
* =========================================================================
* This file is originally part of the JMathTeX Library - http://jmathtex.sourceforge.net
*
* Copyright (C) 2004-2007 Universiteit Gent
* Copyright (C) 2009-2010 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;
import com.himamis.retex.renderer.share.platform.graphics.Graphics2DInterface;
/**
* A box representing another box with a delimiter box and a script box above or under it, with
* script and delimiter seperated by a kern.
*/
public class OverUnderBox extends Box {
// base, delimiter and script atom
private final Box base;
private final Box del;
private final Box script;
// kern amount between the delimiter and the script
private final double kern;
// whether the delimiter should be drawn over (<-> under) the base atom
private final boolean over;
/**
* the parameter boxes must have an equal width!!
*
* @param b base box to be drawn on the baseline
* @param d delimiter box
* @param script subscript or superscript box
* @param over true : draws delimiter and script box above the base box, false : under the base
* box
*/
public OverUnderBox(Box b, Box d, Box script, double kern, boolean over) {
base = b;
del = d;
this.script = script;
this.kern = kern;
this.over = over;
// calculate metrics of the box
width = b.getWidth();
height = b.height + (over ? d.getWidth() : 0)
+ (over && script != null ? script.height + script.depth + kern : 0);
depth = b.depth + (over ? 0 : d.getWidth())
+ (!over && script != null ? script.height + script.depth + kern : 0);
}
@Override
public void draw(Graphics2DInterface g2, double x, double y) {
drawDebug(g2, x, y);
base.draw(g2, x, y);
double yVar = y - base.height - del.getWidth();
del.setDepth(del.getHeight() + del.getDepth());
del.setHeight(0);
if (over) { // draw delimiter and script above base box
double transX = x + (del.height + del.depth) * 0.75, transY = yVar;
g2.saveTransformation();
g2.translate(transX, transY);
g2.rotate(Math.PI / 2);
del.draw(g2, 0, 0);
g2.restoreTransformation();
// draw superscript
if (script != null) {
script.draw(g2, x, yVar - kern - script.depth);
}
}
yVar = y + base.depth;
if (!over) { // draw delimiter and script under base box
double transX = x + (del.getHeight() + del.depth) * 0.75, transY = yVar;
g2.saveTransformation();
g2.translate(transX, transY);
g2.rotate(Math.PI / 2);
del.draw(g2, 0, 0);
g2.restoreTransformation();
yVar += del.getWidth();
// draw subscript
if (script != null) {
script.draw(g2, x, yVar + kern + script.height);
}
}
}
@Override
public int getLastFontId() {
return base.getLastFontId();
}
}