1 <?php

     2 // vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4:

     3 /**

     4  * Mediawiki: Parses for emphazised text.

     5  *

     6  * Text_Wiki rule parser to find source text emphazised

     7  * as defined by text surrounded by repeated single quotes  ''...'' and more

     8  * Translated are ''emphasis'' , '''strong''' or '''''both''''' ...

     9  *

    10  * PHP versions 4 and 5

    11  *

    12  * @category   Text

    13  * @package    Text_Wiki

    14  * @author     Bertrand Gugger <bertrand@toggg.com>

    15  * @author     Paul M. Jones <pmjones@php.net>

    16  * @copyright  2005 bertrand Gugger

    17  * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1

    18  * @version    CVS: $Id: Emphasis.php,v 1.4 2006/02/15 12:27:40 toggg Exp $

    19  * @link       http://pear.php.net/package/Text_Wiki

    20  */

    21 

    22 /**

    23  * Emphazised text rule parser class for Mediawiki. Makes Emphasis, Strong or both

    24  * This class implements a Text_Wiki_Parse to find source text marked for

    25  * emphasis, stronger and very as defined by text surrounded by 2,3 or 5 single-quotes.

    26  * On parsing, the text itself is left in place, but the starting and ending

    27  * instances of the single-quotes are replaced with tokens.

    28  *

    29  * @category   Text

    30  * @package    Text_Wiki

    31  * @author     Bertrand Gugger <bertrand@toggg.com>

    32  * @copyright  2005 bertrand Gugger

    33  * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1

    34  * @version    Release: @package_version@

    35  * @link       http://pear.php.net/package/Text_Wiki

    36  * @see        Text_Wiki_Parse::Text_Wiki_Parse()

    37  */

    38 class Text_Wiki_Parse_Emphasis extends Text_Wiki_Parse {

    39 

    40     /**

    41      * The regular expression used to parse the source text and find

    42      * matches conforming to this rule.  Used by the parse() method.

    43      * We match '' , ''' or ''''' embeded texts

    44      *

    45      * @access public

    46      * @var string

    47      * @see Text_Wiki_Parse::parse()

    48      */

    49     var $regex = "/(?<!')'('{1,4})(.*?)\\1'(?!')/";

    50 

    51     /**

    52      * Generates a replacement for the matched text.  Token options are:

    53      * - 'type' => ['start'|'end'] The starting or ending point of the emphasized text.

    54      * Generated tokens are Emphasis (this rule), Strong or Emphasis / Strong

    55      * The text itself is left in the source but may content bested blocks

    56      *

    57      * @access public

    58      * @param array &$matches The array of matches from parse().

    59      * @return string Delimited by start/end tokens to be used as

    60      * placeholder in the source text surrounding the text to be emphasized.

    61      */

    62     function process(&$matches)

    63     {

    64         $embeded = $matches[2];

    65         switch (strlen($matches[1])) {

    66             case 1:

    67                 $start = $this->wiki->addToken($this->rule, array('type' => 'start'));

    68                 $end   = $this->wiki->addToken($this->rule, array('type' => 'end'));

    69             break;

    70             case 3:

    71                 $embeded = "'" . $embeded . "'";

    72             case 2:

    73                 $start = $this->wiki->addToken('Strong',    array('type' => 'start'));

    74                 $end   = $this->wiki->addToken('Strong',    array('type' => 'end'));

    75             break;

    76             case 4:

    77                 $start = $this->wiki->addToken($this->rule, array('type' => 'start'))

    78                        . $this->wiki->addToken('Strong',    array('type' => 'start'));

    79                 $end   = $this->wiki->addToken('Strong',    array('type' => 'end'))

    80                        . $this->wiki->addToken($this->rule, array('type' => 'end'));

    81             break;

    82         }

    83         return $start . $embeded . $end;

    84     }

    85 }

    86 ?>