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[3.0.0] <style> tags can now be extracted from input HTML using %HTML.ExtractStyleBlocks. These contents can be retrieved from $context->get('StyleBlocks');

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1468 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
2007-12-12 03:29:12 +00:00
parent 54b37674f1
commit 831f552ec5
4 changed files with 92 additions and 0 deletions
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36
library/HTMLPurifier/Lexer.php
View File

@@ -79,6 +79,14 @@ It is not necessary and will have no effect for PHP 4.
This directive has been available since 2.1.0.
');
HTMLPurifier_ConfigSchema::define(
'HTML', 'ExtractStyleBlocks', false, 'bool', '
This directive enables extraction of <code>style</code> tags contents so
that they can be incorporated in the <code>head</code> of the document,
after sufficient validation.
This directive has been available since 3.0.0.
');
/**
* Forgivingly lexes HTML (SGML-style) markup into tokens.
*
@@ -338,6 +346,34 @@ class HTMLPurifier_Lexer
// represent non-SGML characters (horror, horror!)
$html = HTMLPurifier_Encoder::cleanUTF8($html);
if ($config->get('HTML', 'ExtractStyleBlocks')) {
// extract <style> CSS blocks
$html = $this->extractStyleBlocks($html, $config, $context);
}
return $html;
}
private $_styleMatches = array();
/**
* Save the contents of CSS blocks to style matches
*/
protected function styleCallback($matches) {
$this->_styleMatches[] = $matches[1];
}
/**
* Removes inline <style> tags from HTML, saves them for later use
* @todo Extend to indicate non-text/css style blocks
*/
public function extractStyleBlocks($html, $config, $context) {
$html = preg_replace_callback('#<style(?:\s.*)?>(.+)</style>#isU', array($this, 'styleCallback'), $html);
$style_blocks = $this->_styleMatches;
$this->_styleMatches = array(); // reset
// this is a persistent context, so we have to overwrite it with every call
if ($context->exists('StyleBlocks')) $context->destroy('StyleBlocks');
$context->register('StyleBlocks', $style_blocks);
return $html;
}

1
library/HTMLPurifier/Lexer/DOMLex.php
View File

@@ -186,6 +186,7 @@ class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
$ret .= '<html><head>';
$ret .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
// No protection if $html contains a stray </div>!
$ret .= '</head><body><div>'.$html.'</div></body></html>';
return $ret;
}