File xoops_lib\modules\protector\library\HTMLPurifier\TagTransform\Font.php

1:	<?php
2:
3:	/**
4:	* Transforms FONT tags to the proper form (SPAN with CSS styling)
5:	*
6:	* This transformation takes the three proprietary attributes of FONT and
7:	* transforms them into their corresponding CSS attributes. These are color,
8:	* face, and size.
9:	*
10:	* @note Size is an interesting case because it doesn't map cleanly to CSS.
11:	* Thanks to
12:	* http://style.cleverchimp.com/font_size_intervals/altintervals.html
13:	* for reasonable mappings.
14:	* @warning This doesn't work completely correctly; specifically, this
15:	* TagTransform operates before well-formedness is enforced, so
16:	* the "active formatting elements" algorithm doesn't get applied.
17:	*/
18:	class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
19:	{
20:	/**
21:	* @type string
22:	*/
23:	public $transform_to = 'span';
24:
25:	/**
26:	* @type array
27:	*/
28:	protected $_size_lookup = array(
29:	'0' => 'xx-small',
30:	'1' => 'xx-small',
31:	'2' => 'small',
32:	'3' => 'medium',
33:	'4' => 'large',
34:	'5' => 'x-large',
35:	'6' => 'xx-large',
36:	'7' => '300%',
37:	'-1' => 'smaller',
38:	'-2' => '60%',
39:	'+1' => 'larger',
40:	'+2' => '150%',
41:	'+3' => '200%',
42:	'+4' => '300%'
43:	);
44:
45:	/**
46:	* @param HTMLPurifier_Token_Tag $tag
47:	* @param HTMLPurifier_Config $config
48:	* @param HTMLPurifier_Context $context
49:	* @return HTMLPurifier_Token_End\|string
50:	*/
51:	public function transform($tag, $config, $context)
52:	{
53:	if ($tag instanceof HTMLPurifier_Token_End) {
54:	$new_tag = clone $tag;
55:	$new_tag->name = $this->transform_to;
56:	return $new_tag;
57:	}
58:
59:	$attr = $tag->attr;
60:	$prepend_style = '';
61:
62:	// handle color transform
63:	if (isset($attr['color'])) {
64:	$prepend_style .= 'color:' . $attr['color'] . ';';
65:	unset($attr['color']);
66:	}
67:
68:	// handle face transform
69:	if (isset($attr['face'])) {
70:	$prepend_style .= 'font-family:' . $attr['face'] . ';';
71:	unset($attr['face']);
72:	}
73:
74:	// handle size transform
75:	if (isset($attr['size'])) {
76:	// normalize large numbers
77:	if ($attr['size'] !== '') {
78:	if ($attr['size'][0] == '+' \|\| $attr['size'][0] == '-') {
79:	$size = (int)$attr['size'];
80:	if ($size < -2) {
81:	$attr['size'] = '-2';
82:	}
83:	if ($size > 4) {
84:	$attr['size'] = '+4';
85:	}
86:	} else {
87:	$size = (int)$attr['size'];
88:	if ($size > 7) {
89:	$attr['size'] = '7';
90:	}
91:	}
92:	}
93:	if (isset($this->_size_lookup[$attr['size']])) {
94:	$prepend_style .= 'font-size:' .
95:	$this->_size_lookup[$attr['size']] . ';';
96:	}
97:	unset($attr['size']);
98:	}
99:
100:	if ($prepend_style) {
101:	$attr['style'] = isset($attr['style']) ?
102:	$prepend_style . $attr['style'] :
103:	$prepend_style;
104:	}
105:
106:	$new_tag = clone $tag;
107:	$new_tag->name = $this->transform_to;
108:	$new_tag->attr = $attr;
109:
110:	return $new_tag;
111:	}
112:	}
113:
114:	// vim: et sw=4 sts=4
115:

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