Java ASCII asciiFill2(String str, int startIdx, String fillStr)

Description

ascii Fill

License

Apache License

Declaration

public static String asciiFill2(String str, int startIdx, String fillStr) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {

    public static String asciiFill2(String str, int startIdx, String fillStr) {
        int idx = asciiIdx2StrIdx(str, startIdx);
        String ret = "";
        if (idx == -1) {
            ret = asciiPaddingR(str, startIdx, " ");
            ret += fillStr;/*from   w w  w.  j  a  v a2 s.c o  m*/
        } else {
            ret = str.substring(0, idx) + fillStr;
            if (ret.length() < str.length())
                ret += str.substring(ret.length());
        }
        return ret;
    }

    public static int asciiIdx2StrIdx(String str, int asciiIdx) {
        int length = 0;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            length += c > 127 ? 2 : 1;
            if (length >= asciiIdx)
                return i;
        }

        return -1;
    }

    public static String asciiPaddingR(String str, int length,
            String padding) {
        String rst = asciiTrimR(str, length);
        int alen = asciiLength(rst);
        if (alen == length)
            return rst;
        rst += repeat(padding, (length - alen) / asciiLength(padding));
        return rst;
    }

    public static String asciiTrimR(String str, int length) {
        int alen = asciiLength(str);
        if (alen <= length)
            return str;
        String result = "";
        alen = 0;
        for (int i = 0; i < length; i++) {
            char c = str.charAt(i);
            alen += c > 127 ? 2 : 1;
            if (alen <= length)
                result += c;
            else
                break;
        }
        return result;
    }

    public static int asciiLength(String str) {
        int length = 0;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            length += c > 127 ? 2 : 1;
        }

        return length;
    }

    public static String repeat(String str, int times) {
        String r = "";
        for (int i = 0; i < times; i++)
            r += str;
        return r;
    }
}

Related

1. asciiDump(byte[] in)
2. asciiEbcdic(String source)
3. asciiEndsWithIgnoreCase(String source, String suffix)
4. asciiEqualsIgnoreCase(byte[] a, byte[] b)
5. asciiEqualsIgnoreCase(byte[] buf1, byte[] buf2)
6. asciify(String s)
7. asciiIdx2StrIdx(String str, int asciiIdx)
8. asciiLength(String str)
9. asciiPaddingR(String str, int length, String padding)