static function filter($text = '')
{
$text = preg_replace_callback('/<codeblock([^>]*)>(.*)<\\/codeblock>/Usm', array(__CLASS__, '_escapeBlockContentCB'), $text);
$tokens = gb_tokenize_html($text);
$out = '';
$depth = 0;
$block = '';
$tag = '';
foreach ($tokens as $token) {
if (substr($token, 0, 10) === '<codeblock') {
$depth++;
if ($depth === 1) {
# code block just started
$tag = $token;
continue;
}
} elseif (substr($token, 0, 12) === '</codeblock>') {
$depth--;
if ($depth < 0) {
gb::log(LOG_WARNING, 'stray </codeblock> messing up a code block');
$depth = 0;
}
if ($depth === 0) {
# code block ended
if ($block) {
$block = base64_decode($block);
$lang = '';
# find lang, if any
if (preg_match('/[\\s\\t ]+lang=("[^"]*"|\'[^\']*\')[\\s\\t ]*/', $tag, $m, PREG_OFFSET_CAPTURE)) {
$lang = trim($m[1][0], '"\'');
$end = substr($tag, $m[0][1] + strlen($m[0][0]));
$tag = substr($tag, 0, $m[0][1]) . ($end === '>' ? '>' : ' ' . $end);
}
# add CSS class name
$extra_cssclass = '';
if (preg_match('/class="([^"]+)"/', $tag, $m)) {
$extra_cssclass = $m[1];
}
# remove first and last line break if present
if ($block[0] === "\n") {
$block = substr($block, 1);
}
if ($block[strlen($block) - 1] === "\n") {
$block = substr($block, 0, -1);
}
# expand tabs
if (self::$conf['tabsize']) {
$block = strtr($block, array("\t" => str_repeat(' ', self::$conf['tabsize'])));
}
# append block to output
$out .= self::highlight($block, $lang, $extra_cssclass);
# clear block
$block = '';
}
continue;
}
}
# in codeblock or not?
if ($depth) {
$block .= $token;
} else {
$out .= $token;
}
}
return $out;
}
function gb_uri_to_html_link($text)
{
$tokens = gb_tokenize_html($text);
$out = '';
foreach ($tokens as $token) {
if (isset($token[0]) && $token[0] !== '<' && $token[0] !== '[') {
$words = preg_split('/([\\x00-\\x20\\x7f\\x60"\'<>\\\\\\]\\[\\^]+)/', $token, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
$token = '';
foreach ($words as $word) {
$word = preg_replace('/^[a-zA-Z][a-zA-Z0-9\\.+-]*:.+$/', '<a href="$0">$0</a>', $word);
$token .= $word;
}
}
$out .= $token;
}
return $out;
}
