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[code] magic

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This commit is contained in:
Shish 2009-01-24 01:16:49 -08:00
parent 54e3eef69c
commit aa0d57486a
1 changed files with 45 additions and 1 deletions
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46
ext/bbcode/main.php
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@ -9,11 +9,11 @@ class BBCode implements Extension {
}
private function bbcode_to_html($text) {
$text = $this->extract_code($text);
$text = preg_replace("/\[b\](.*?)\[\/b\]/s", "<b>\\1</b>", $text);
$text = preg_replace("/\[i\](.*?)\[\/i\]/s", "<i>\\1</i>", $text);
$text = preg_replace("/\[u\](.*?)\[\/u\]/s", "<u>\\1</u>", $text);
$text = preg_replace("/\[s\](.*?)\[\/s\]/s", "<s>\\1</s>", $text);
$text = preg_replace("/\[code\](.*?)\[\/code\]/s", "<pre>\\1</pre>", $text);
$text = preg_replace("/&gt;&gt;(\d+)/s", "<a href=\"".make_link("post/view/\\1")."\">&gt;&gt;\\1</a>", $text);
$text = preg_replace("/&gt;&gt;([^\d].+)/", "<blockquote><small>\\1</small></blockquote>", $text);
$text = preg_replace("/\[url=((?:https?|ftp|irc|mailto):\/\/.*?)\](.*?)\[\/url\]/s", "<a href=\"\\1\">\\2</a>", $text);
@ -35,6 +35,7 @@ class BBCode implements Extension {
$text = preg_replace("#\[\*\]#s", "<li>", $text);
$text = preg_replace("#<br><(li|ul|ol|/ul|/ol)>#s", "<\\1>", $text);
$text = $this->filter_spoiler($text);
$text = $this->insert_code($text);
return $text;
}
@ -88,6 +89,49 @@ class BBCode implements Extension {
}
return $text;
}
private function extract_code($text) {
# at the end of this function, the only code! blocks should be
# the ones we've added -- others may contain malicious content,
# which would only appear after decoding
$text = preg_replace("/\[code!\](.*?)\[\/code!\]/s", "[code]\\1[/code]", $text);
$l1 = strlen("[code]");
$l2 = strlen("[/code]");
while(true) {
$start = strpos($text, "[code]");
if($start === false) break;
$end = strpos($text, "[/code]");
if($end === false) break;
$beginning = substr($text, 0, $start);
$middle = base64_encode(substr($text, $start+$l1, ($end-$start-$l1)));
$ending = substr($text, $end + $l2, (strlen($text)-$end+$l2));
$text = $beginning . "[code!]" . $middle . "[/code!]" . $ending;
}
return $text;
}
private function insert_code($text) {
$l1 = strlen("[code!]");
$l2 = strlen("[/code!]");
while(true) {
$start = strpos($text, "[code!]");
if($start === false) break;
$end = strpos($text, "[/code!]");
if($end === false) break;
$beginning = substr($text, 0, $start);
$middle = base64_decode(substr($text, $start+$l1, ($end-$start-$l1)));
$ending = substr($text, $end + $l2, (strlen($text)-$end+$l2));
$text = $beginning . "<pre>" . $middle . "</pre>" . $ending;
}
return $text;
}
}
add_event_listener(new BBCode());
?>