com.mikehoffert.easyappend.view.TextWrapper.java Source code

Introduction

Here is the source code for com.mikehoffert.easyappend.view.TextWrapper.java

Source

/*
 * This class was originally created by Sean Patrick Floyd
 *     <http://stackoverflow.com/users/342852/sean-patrick-floyd>
 *     Posted at <http://stackoverflow.com/a/5689524/1968462>
 * As with all code posted to StackOverflow (at least at the time that the code
 * was obtained), the code is licensed under CC-BY-SA 3.0.
 * 
 * This class has since been extended by Mike Hoffert. Due to the buggy nature
 * of the soft wrapping, it has been reduced to a hard wrap-only, with a smaller
 * size since strategies are no longer needed.
 */

package com.mikehoffert.easyappend.view;

import com.google.common.base.CharMatcher;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;

/**
 * An immutable class for performing text wrapping.
 */
public class TextWrapper {
    /**
     * The delimiter to use for splitting the text into words.
     */
    final private CharMatcher delimiter;

    /**
     * The maximum width of the text.
     */
    final private int width;

    /**
     * An optional level of indentation.
     */
    final private int indentLevel;

    /**
     * Initializes the text wrapper with the appropriate strategy.
     * @param strategy The strategy to use.
     * @param delimiter The delimiter to break words up with.
     * @param width The maximum width of the lines.
     */
    private TextWrapper(CharMatcher delimiter, int width, int indentLevel) {
        this.delimiter = delimiter;
        this.width = width;
        this.indentLevel = indentLevel;
    }

    /**
     * Creates a wrapper for the desired width.
     * @param i The maximum width of the lines.
     * @return The text wrapper.
     */
    public static TextWrapper forWidth(int i) {
        return new TextWrapper(CharMatcher.WHITESPACE, i, 0);
    }

    /**
     * Enables hard wrapping.
     */
    public TextWrapper hard() {
        return new TextWrapper(this.delimiter, this.width, this.indentLevel);
    }

    /**
     * Sets the indentation level of the wrapper, in spaces.
     */
    public TextWrapper setIndentLevel(int indentLevel) {
        return new TextWrapper(this.delimiter, this.width, indentLevel);
    }

    /**
     * Wraps the desired text.
     * @param text The text to wrap.
     * @return The wrapped text.
     */
    public String wrap(final String text) {
        String indent = new String(new char[indentLevel]).replace("\0", " ");
        return indent + Joiner.on("\n" + indent).join(Splitter.fixedLength(width - indentLevel)
                .split(Joiner.on(' ').join(Splitter.on(this.delimiter).split(text))));
    }
}