Java Word Wrap wordWrap(String input, int width, Locale locale)

Description

word Wrap

License

Open Source License

Declaration

public static String wordWrap(String input, int width, Locale locale) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.BreakIterator;

import java.util.Locale;

public class Main {
    public static String wordWrap(String input, int width, Locale locale) {
        // protect ourselves
        if (input == null) {
            return "";
        } else if (width < 5) {
            return input;
        } else if (width >= input.length()) {
            return input;
        }//  w  w  w .j  av a2s  . co  m

        StringBuilder buf = new StringBuilder(input);
        boolean endOfLine = false;
        int lineStart = 0;

        for (int i = 0; i < buf.length(); i++) {
            if (buf.charAt(i) == '\n') {
                lineStart = i + 1;
                endOfLine = true;
            }
            if (buf.charAt(i) == '\u200e') {
                lineStart = i + 1;
            }
            // handle splitting at width character
            if (i > lineStart + width - 1) {
                if (!endOfLine) {
                    int limit = i - lineStart - 1;
                    BreakIterator breaks = BreakIterator.getLineInstance(locale);
                    breaks.setText(buf.substring(lineStart, i));
                    int end = breaks.last();

                    // if the last character in the search string isn't a space,
                    // we can't split on it (looks bad). Search for a previous
                    // break character
                    if (end == limit + 1) {
                        if (!Character.isWhitespace(buf.charAt(lineStart + end))) {
                            end = breaks.preceding(end - 1);
                        }
                    }

                    // if the last character is a space, replace it with a \n
                    if (end != BreakIterator.DONE && end == limit + 1) {
                        buf.replace(lineStart + end, lineStart + end + 1, "\n");
                        lineStart = lineStart + end;
                    }
                    // otherwise, just insert a \n
                    else if (end != BreakIterator.DONE && end != 0) {
                        buf.insert(lineStart + end, '\n');
                        lineStart = lineStart + end + 1;
                    } else {
                        buf.insert(i, '\n');
                        lineStart = i + 1;
                    }
                } else {
                    buf.insert(i, '\n');
                    lineStart = i + 1;
                    endOfLine = false;
                }
            }
        }

        return buf.toString();
    }
}

Related

1. wordWrap(String input, int width, Locale locale)
2. wordWrap(String input, int width, Locale locale)
3. wrapString(String original, int width, BreakIterator breakIterator, boolean removeNewLines)
4. wrapStringToArray(String original, int width, BreakIterator breakIterator, boolean removeNewLines)
5. wrapText(String s, int width, boolean noIterator)
6. wrapText(String string, int theWrapLength)