| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * |
| 5 | * "Pre-filter" the source text. |
| 6 | * |
| 7 | * @category Text |
| 8 | * |
| 9 | * @package Text_Wiki |
| 10 | * |
| 11 | * @author Paul M. Jones <pmjones@php.net> |
| 12 | * |
| 13 | * @license LGPL |
| 14 | * |
| 15 | * @version $Id: Prefilter.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $ |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * |
| 21 | * "Pre-filter" the source text. |
| 22 | * |
| 23 | * Convert DOS and Mac line endings to Unix, concat lines ending in a |
| 24 | * backslash \ with the next line, convert tabs to 4-spaces, add newlines |
| 25 | * to the top and end of the source text, compress 3 or more newlines to |
| 26 | * 2 newlines. |
| 27 | * |
| 28 | * @category Text |
| 29 | * |
| 30 | * @package Text_Wiki |
| 31 | * |
| 32 | * @author Paul M. Jones <pmjones@php.net> |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | class Text_Wiki_Parse_Prefilter extends Text_Wiki_Parse { |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * |
| 41 | * Simple parsing method. |
| 42 | * |
| 43 | * @access public |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | function parse() |
| 48 | { |
| 49 | // convert DOS line endings |
| 50 | $this->wiki->source = str_replace("\r\n", "\n", |
| 51 | $this->wiki->source); |
| 52 | |
| 53 | // convert Macintosh line endings |
| 54 | $this->wiki->source = str_replace("\r", "\n", |
| 55 | $this->wiki->source); |
| 56 | |
| 57 | // concat lines ending in a backslash |
| 58 | $this->wiki->source = str_replace("\\\n", "", |
| 59 | $this->wiki->source); |
| 60 | |
| 61 | // convert tabs to four-spaces |
| 62 | $this->wiki->source = str_replace("\t", " ", |
| 63 | $this->wiki->source); |
| 64 | |
| 65 | // add extra newlines at the top and end; this |
| 66 | // seems to help many rules. |
| 67 | $this->wiki->source = "\n" . $this->wiki->source . "\n\n"; |
| 68 | |
| 69 | // finally, compress all instances of 3 or more newlines |
| 70 | // down to two newlines. |
| 71 | $find = "/\n{3,}/m"; |
| 72 | $replace = "\n\n"; |
| 73 | $this->wiki->source = preg_replace($find, $replace, |
| 74 | $this->wiki->source); |
| 75 | } |
| 76 | |
| 77 | } |
| 78 | ?> |