/* VerticalBox.java
* =========================================================================
* This file is originally part of the JMathTeX Library - http://jmathtex.sourceforge.net
*
* Copyright (C) 2004-2007 Universiteit Gent
* Copyright (C) 2009 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 java.util.ArrayList;
import java.util.ListIterator;
import com.himamis.retex.renderer.share.platform.graphics.Graphics2DInterface;
/**
* A box composed of other boxes, put one above the other.
*/
class VerticalBox extends Box {
private double leftMostPos = Double.MAX_VALUE;
private double rightMostPos = -Double.MAX_VALUE;
public VerticalBox() {
}
public VerticalBox(Box b, double rest, int alignment) {
this();
add(b);
if (alignment == TeXConstants.ALIGN_CENTER) {
StrutBox s = new StrutBox(0, rest / 2, 0, 0);
super.add(0, s);
height += rest / 2;
depth += rest / 2;
super.add(s);
} else if (alignment == TeXConstants.ALIGN_TOP) {
depth += rest;
super.add(new StrutBox(0, rest, 0, 0));
} else if (alignment == TeXConstants.ALIGN_BOTTOM) {
height += rest;
super.add(0, new StrutBox(0, rest, 0, 0));
}
}
@Override
public final void add(Box b) {
super.add(b);
if (children.size() == 1) {
height = b.height;
depth = b.depth;
} else {
depth += b.height + b.depth;
}
recalculateWidth(b);
}
public final void add(Box b, double interline) {
if (children.size() >= 1) {
add(new StrutBox(0, interline, 0, 0));
}
add(b);
}
private void recalculateWidth(Box b) {
leftMostPos = Math.min(leftMostPos, b.shift);
rightMostPos = Math.max(rightMostPos, b.shift + (b.width > 0 ? b.width : 0));
width = rightMostPos - leftMostPos;
}
@Override
public void add(int pos, Box b) {
super.add(pos, b);
if (pos == 0) {
depth += b.depth + height;
height = b.height;
} else {
depth += b.height + b.depth;
}
recalculateWidth(b);
}
@Override
public void draw(Graphics2DInterface g2, double x, double y) {
double yPos = y - height;
for (Box b : children) {
yPos += b.getHeight();
b.draw(g2, x + b.getShift() - leftMostPos, yPos);
yPos += b.getDepth();
}
}
public int getSize() {
return children.size();
}
@Override
public int getLastFontId() {
// iterate from the last child box (the lowest) to the first (the highest)
// untill a font id is found that's not equal to NO_FONT
int fontId = TeXFont.NO_FONT;
for (ListIterator it = children.listIterator(children.size()); fontId == TeXFont.NO_FONT
&& it.hasPrevious();) {
fontId = ((Box) it.previous()).getLastFontId();
}
return fontId;
}
@Override
public void getPath(double x, double y, ArrayList<Integer> list) {
double yPos = 0;
for (Box box : children) {
if (box instanceof StrutBox || box instanceof HorizontalRule) {
yPos += box.getHeight() + box.getDepth();
continue;
}
if (yPos + box.getHeight() + box.getDepth() > y) {
list.add(children.indexOf(box));
box.getPath(x, y - yPos, list);
return;
}
yPos += box.getHeight() + box.getDepth();
}
if (y > yPos) {
list.add(children.size() - 1);
children.get(children.size() - 1).getPath(x, y - yPos, list);
}
}
}