com.github.dirkraft.jash.JasherFormatter.java Source code

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Here is the source code for com.github.dirkraft.jash.JasherFormatter.java

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Jason Dunkelberger (dirkraft)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.github.dirkraft.jash;

import com.google.common.base.Strings;

import java.text.BreakIterator;
import java.util.List;

/**
 * TODO promote to core, mash into JashStreams
 */
public class JasherFormatter {

    public static final char BULLET = '-';
    public static final String NEW_LINE = String.format("%n");

    public static String bulleted(List<String> messages, int width) {
        final String bulletLead = "  " + BULLET + ' ';
        final String whitespaceLead = Strings.repeat(" ", bulletLead.length());

        StringBuilder sb = new StringBuilder();
        for (String message : messages) {

            BreakIterator boundary = BreakIterator.getLineInstance();
            boundary.setText(message);

            StringBuilder line = new StringBuilder(bulletLead);
            int start = boundary.first();
            for (int end = boundary.next(); end != BreakIterator.DONE; start = end, end = boundary.next()) {

                String token = message.substring(start, end);
                if (line.length() != 0 && line.length() + token.length() > width) {
                    line.append(NEW_LINE).append(whitespaceLead);
                    sb.append(line);
                    line = new StringBuilder();
                }

                line.append(token);
            }
            sb.append(line);
        }
        return sb.toString();
    }

}