1<?php
2// vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4:
3/**
4 * BBCode: Parses for font size tag.
5 *
6 * This class implements a Text_Wiki_Rule to find source text with size
7 * as defined by text surrounded by [size=...] ... [/size] (nesting)
8 * On parsing, the text itself is left in place, but the starting and ending
9 * tags are replaced with tokens.
10 *
11 * PHP versions 4 and 5
12 *
13 * @category   Text
14 * @package    Text_Wiki
15 * @author     Bertrand Gugger <bertrand@toggg.com>
16 * @copyright  2005 bertrand Gugger
17 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
18 * @version    CVS: $Id$
19 * @link       http://pear.php.net/package/Text_Wiki
20 */
21
22/**
23 * Font rule parser class (with nesting) for BBCode. ([size=...]...[/size])
24 *
25 * @category   Text
26 * @package    Text_Wiki
27 * @author     Bertrand Gugger <bertrand@toggg.com>
28 * @copyright  2005 bertrand Gugger
29 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
30 * @version    Release: @package_version@
31 * @link       http://pear.php.net/package/Text_Wiki
32 * @see        Text_Wiki_Parse::Text_Wiki_Parse()
33 */
34class Text_Wiki_Parse_Font extends Text_Wiki_Parse {
35
36    /**
37     * The regular expression used to parse the source text and find
38     * matches conforming to this rule.  Used by the parse() method.
39     *
40     * @access public
41     * @var string
42     * @see parse()
43     */
44    var $regex = "#\[size=(\d+)]((?:((?R))|.)*?)\[/size]#msi";
45
46    /**
47     * The current font nesting depth, starts by zero
48     *
49     * @access private
50     * @var int
51     */
52    var $_level = 0;
53
54    /**
55     * Generates a replacement for the matched text.  Token options are:
56     * - 'type' => ['start'|'end'] The starting or ending point of the sized text.
57     * The text itself is left in the source but may content bested blocks
58     * - 'level' => the level of nesting (starting 0)
59     * - 'size' => the size indicator
60     *
61     * @param array &$matches The array of matches from parse().
62     * @return string Delimited by start/end tokens to be used as
63     * placeholder in the source text surrounding the text to be sized.
64     * @access public
65     */
66    function process(&$matches)
67    {
68        // nested block ?
69        if (array_key_exists(3, $matches)) {
70            $this->_level++;
71            $expsub = preg_replace_callback(
72                $this->regex,
73                array(&$this, 'process'),
74                $matches[2]
75            );
76            $this->_level--;
77        } else {
78            $expsub = $matches[2];
79        }
80
81        // builds the option array
82        $options = array('type' => 'start', 'level' => $this->_level, 'size' => $matches[1]);
83        $statok = $this->wiki->addToken($this->rule, $options);
84        $options['type'] = 'end';
85        return $statok . $expsub . $this->wiki->addToken($this->rule, $options);
86    }
87}
88