/usr/share/php/Horde/Mime/Viewer/Richtext.php is in php-horde-mime-viewer 2.0.5-1.
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/**
* The Horde_Mime_Viewer_Richtext class renders out HTML text from
* text/richtext content tags, (RFC 1896 [7.1.3]).
*
* A minimal richtext implementation is one that simply converts "<lt>" to
* "<", converts CRLFs to SPACE, converts <nl> to a newline according to
* local newline convention, removes everything between a <comment> command
* and the next balancing </comment> command, and removes all other
* formatting commands (all text enclosed in angle brackets).
*
* We implement the following tags:
* <bold>, <italic>, <fixed>, <smaller>, <bigger>, <underline>, <center>,
* <flushleft>, <flushright>, <indent>, <subscript>, <excerpt>, <paragraph>,
* <signature>, <comment>, <no-op>, <lt>, <nl>
*
* The following tags are implemented differently than described in the RFC
* (due to limitations in HTML output):
* <heading> - Output as centered, bold text.
* <footing> - Output as centered, bold text.
* <np> - Output as paragraph break.
*
* The following tags are NOT implemented:
* <indentright>, <outdent>, <outdentright>, <samepage>, <iso-8859-X>,
* <us-ascii>,
*
* Copyright 2004-2013 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Mime_Viewer
*/
class Horde_Mime_Viewer_Richtext extends Horde_Mime_Viewer_Base
{
/**
* This driver's display capabilities.
*
* @var array
*/
protected $_capability = array(
'full' => true,
'info' => false,
'inline' => true,
'raw' => false
);
/**
* Return the full rendered version of the Horde_Mime_Part object.
*
* @return array See parent::render().
*/
protected function _render()
{
return $this->_renderFullReturn($this->_renderReturn(
$this->_toHTML(),
'text/html; charset=' . $this->_mimepart->getCharset()
));
}
/**
* Return the rendered inline version of the Horde_Mime_Part object.
*
* @return array See parent::render().
*/
protected function _renderInline()
{
return $this->_renderReturn(
Horde_String::convertCharset($this->_toHTML(), $this->_mimepart->getCharset(), 'UTF-8'),
'text/html; charset=UTF-8'
);
}
/**
* Convert richtext to HTML.
*
* @return string The converted HTML string.
*/
protected function _toHTML()
{
$text = trim($this->_mimepart->getContents());
if ($text == '') {
return array();
}
/* We add space at the beginning and end of the string as it will
* make some regular expression checks later much easier (so we
* don't have to worry about start/end of line characters). */
$text = ' ' . $text . ' ';
/* Remove everything between <comment> tags. */
$text = preg_replace('/<comment.*>.*<\/comment>/Uis', '', $text);
/* Remove any unrecognized tags in the text. We don't need <no-op>
* in $tags since it doesn't do anything anyway. All <comment> tags
* have already been removed. */
$tags = '<bold><italic><fixed><smaller><bigger><underline><center><flushleft><flushright><indent><subscript><excerpt><paragraph><signature><lt><nl>';
$text = strip_tags($text, $tags);
/* <lt> becomes a '<'. CRLF becomes a SPACE. */
$text = str_ireplace(array('<lt>', "\r\n"), array('<', ' '), $text);
/* We try to protect against bad stuff here. */
$text = @htmlspecialchars($text, ENT_QUOTES, $this->_mimepart->getCharset());
/* <nl> becomes a newline (<br />);
* <np> becomes a paragraph break (<p />). */
$text = str_ireplace(array('<nl>', '<np>'), array('<br />', '<p />'), $text);
/* Now convert the known tags to html. Try to remove any tag
* parameters to stop people from trying to pull a fast one. */
$replace = array(
'/(?<!<)<bold.*>(.*)<\/bold>/Uis' => '<span style="font-weight: bold">\1</span>',
'/(?<!<)<italic.*>(.*)<\/italic>/Uis' => '<span style="font-style: italic">\1</span>',
'/(?<!<)<fixed.*>(.*)<\/fixed>/Uis' => '<font face="fixed">\1</font>',
'/(?<!<)<smaller.*>(.*)<\/smaller>/Uis' => '<span style="font-size: smaller">\1</span>',
'/(?<!<)<bigger.*>(.*)<\/bigger>/Uis' => '<span style="font-size: larger">\1</span>',
'/(?<!<)<underline.*>(.*)<\/underline>/Uis' => '<span style="text-decoration: underline">\1</span>',
'/(?<!<)<center.*>(.*)<\/center>/Uis' => '<div align="center">\1</div>',
'/(?<!<)<flushleft.*>(.*)<\/flushleft>/Uis' => '<div align="left">\1</div>',
'/(?<!<)<flushright.*>(.*)<\/flushright>/Uis' => '<div align="right">\1</div>',
'/(?<!<)<indent.*>(.*)<\/indent>/Uis' => '<blockquote>\1</blockquote>',
'/(?<!<)<excerpt.*>(.*)<\/excerpt>/Uis' => '<cite>\1</cite>',
'/(?<!<)<subscript.*>(.*)<\/subscript>/Uis' => '<sub>\1</sub>',
'/(?<!<)<superscript.*>(.*)<\/superscript>/Uis' => '<sup>\1</sup>',
'/(?<!<)<heading.*>(.*)<\/heading>/Uis' => '<br /><div align="center" style="font-weight: bold">\1</div><br />',
'/(?<!<)<footing.*>(.*)<\/footing>/Uis' => '<br /><div align="center" style="font-weight: bold">\1</div><br />',
'/(?<!<)<paragraph.*>(.*)<\/paragraph>/Uis' => '<p>\1</p>',
'/(?<!<)<signature.*>(.*)<\/signature>/Uis' => '<address>\1</address>'
);
$text = preg_replace(array_keys($replace), array_values($replace), $text);
/* Now we remove the leading/trailing space we added at the start. */
$text = substr($text, 1, -1);
/* Wordwrap. */
$text = str_replace(array("\t", ' ', "\n "), array(' ', ' ', "\n "), $text);
if ($text[0] == ' ') {
$text = ' ' . substr($text, 1);
}
return '<p style="font-size:100%;font-family:Lucida Console,Courier,Courier New;">' . nl2br($text) . '</p>';
}
}
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