| 1 | package dolda.jsvc.next; |
| 2 | |
| 3 | import java.io.*; |
| 4 | |
| 5 | public class ColumnWriter extends FilterWriter { |
| 6 | public int line, col; |
| 7 | public boolean start = true; |
| 8 | |
| 9 | public ColumnWriter(Writer out) { |
| 10 | super(out); |
| 11 | line = col = 0; |
| 12 | } |
| 13 | |
| 14 | private void hc(int c) { |
| 15 | if(c == '\n') { |
| 16 | col = 0; |
| 17 | line++; |
| 18 | start = true; |
| 19 | } else if(c == '\t') { |
| 20 | col = (col - (col % 8)) + 8; |
| 21 | } else { |
| 22 | col++; |
| 23 | } |
| 24 | if(!Character.isWhitespace(c)) |
| 25 | start = false; |
| 26 | } |
| 27 | |
| 28 | public void write(int c) throws IOException { |
| 29 | super.write(c); |
| 30 | hc(c); |
| 31 | } |
| 32 | |
| 33 | public void write(String s, int off, int len) throws IOException { |
| 34 | super.write(s, off, len); |
| 35 | for(int i = 0; i < s.length(); i++) |
| 36 | hc(s.charAt(i)); |
| 37 | } |
| 38 | |
| 39 | public void write(char[] b, int off, int len) throws IOException { |
| 40 | super.write(b, off, len); |
| 41 | for(int i = 0; i < len; i++, off++) |
| 42 | hc(b[off]); |
| 43 | } |
| 44 | |
| 45 | public void indent(int level) throws IOException { |
| 46 | if(!start) |
| 47 | write('\n'); |
| 48 | while(col < level) |
| 49 | write(' '); |
| 50 | } |
| 51 | } |