com.github.javaclub.sso.common.captcha.font.RandomFontFactory Maven / Gradle / Ivy

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/**
 * Copyright (c) 2011-2018.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.github.javaclub.sso.common.captcha.font;

import java.awt.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

/**
 * 随机字体
 */
public class RandomFontFactory implements FontFactory {

	protected List families;

	protected int minSize;

	protected int maxSize;

	protected boolean randomStyle;


	public RandomFontFactory() {
		families = new ArrayList();
		families.add("Verdana");
		families.add("Tahoma");
		families.add("Arial");
		families.add("Time News Roman");
		families.add("Courier New");
		families.add("Geneva");
		families.add("Courier");
		
		minSize = 45;
		maxSize = 45;
	}


	public RandomFontFactory( List families ) {
		this();
		this.families = families;
	}


	public RandomFontFactory( String[] families ) {
		this();
		this.families = Arrays.asList(families);
	}


	public RandomFontFactory( int size, List families ) {
		this(families);
		minSize = maxSize = size;
	}


	public RandomFontFactory( int size, String[] families ) {
		this(families);
		minSize = maxSize = size;
	}


	public void setFamilies( List families ) {
		this.families = families;
	}


	public void setMinSize( int minSize ) {
		this.minSize = minSize;
	}


	public void setMaxSize( int maxSize ) {
		this.maxSize = maxSize;
	}


	public void setRandomStyle( boolean randomStyle ) {
		this.randomStyle = randomStyle;
	}


	public Font getFont( int index ) {
		Random r = new Random();
		String family = families.get(r.nextInt(families.size()));
		boolean bold = r.nextBoolean() && randomStyle;
		int size = minSize;
		if ( maxSize - minSize > 0 ) {
			size += r.nextInt(maxSize - minSize);
		}
		return new Font(family, bold ? Font.BOLD : Font.PLAIN, size);
	}

}