RandomYBestFitTextRenderer.java

/*
 * Copyright (c) 2009 Piotr Piastucki
 * 
 * This file is part of Patchca CAPTCHA library.
 * 
 *  Patchca is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  Patchca 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 Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with Patchca. If not, see <http://www.gnu.org/licenses/>.
 */
package com.xiongyingqi.captcha.text.renderer;

import java.util.Random;

public class RandomYBestFitTextRenderer extends AbstractTextRenderer {

    @Override
    protected void arrangeCharacters(int width, int height, TextString ts) {
        double widthRemaining = (width - ts.getWidth() - leftMargin - rightMargin) / ts.getCharacters().size();
        double vmiddle = height / 2;
        double x = leftMargin + widthRemaining / 2;
        Random r = new Random();
        height -= topMargin + bottomMargin;
        for (TextCharacter tc : ts.getCharacters()) {
            double heightRemaining = height - tc.getHeight();
            double y = vmiddle + 0.35 * tc.getAscent() + (1 - 2 * r.nextDouble()) * heightRemaining;
            tc.setX(x);
            tc.setY(y);
            x += tc.getWidth() + widthRemaining;
        }
    }

}