.
require_once('../inc/sanitize_html.inc');
// Functions that process user-supplied text (e.g. messages)
// prior to displaying it to users.
// Goals:
// - Security (don't send evil javascript)
// - obey user preferences
// - improve formatting (e.g., convert newlines to
tags)
class output_options {
var $bb2html; // BBCode as HTML? (on)
var $images_as_links; // Images as hyperlinks? (off)
var $link_popup; // Links in new windows? (off)
var $closeTags; // Close extra HTML tags? (on)
var $nl2br; // Convert newlines to
's? (on)
var $htmlitems; // Convert special chars to HTML entities? (on)
var $htmlscrub; // Scrub "bad" HTML tags? (off)
var $highlight_terms;// Array of terms to be highlighted (off)
// Constructor - set the defaults.
function output_options() {
$this->bb2html = 1;
$this->images_as_links = 0;
$this->link_popup = 0;
$this->closeTags = 1;
$this->nl2br = 1;
$this->htmlitems = 1;
$this->htmlscrub = 0;
$this->highlight_terms = 0;
return true;
}
// Define the terms to be highlighted (for use with searches and such)
function setHighlightTerms($terms) {
if (is_array($terms)) {
$this->highlight_terms = $terms;
} else {
return false;
}
return true;
}
}
// Do the actual transformation of the text.
// TODO: Make this part of the above class.
function output_transform($text, $options = NULL) {
// Options is a output_options object, defined above
if (!$options) {
$options = new output_options; // Defaults in the class definition
}
if ($options->htmlitems) {
//$text = htmlentities($text);
$text = htmlspecialchars($text);
}
// if ($options->htmlscrub) {
// $text = sanitize_html($text);
// }
if ($options->nl2br) {
$text = nl2br($text);
}
if ($options->bb2html) {
$text = bb2html($text);
}
if ($options->images_as_links) {
$text = image_as_link($text);
}
if ($options->link_popup) {
$text = externalize_links($text);
}
if (is_array($options->highlight_terms)) {
$text = highlight_terms($text, $options->highlight_terms);
}
return $text;
}
function get_output_options($user) {
$options = new output_options();
if ($user) {
if ($user->prefs->images_as_links) $options->images_as_links = 1;
if ($user->prefs->link_popup) $options->link_popup = 1;
}
return $options;
}
// Converts bbcode to proper HTML
function bb2html($text) {
$urlregex = "(?:\"?)(?:(http\:\/\/)?)([^\[\"<\ ]+)(?:\"?)";
$httpsregex = "(?:\"?)https\:\/\/([^\[\"<\ ]+)(?:\"?)";
// List of allowable tags
$bbtags = array (
"@\[b\](.*?)\[/b\]@is",
"@\[i\](.*?)\[/i\]@is",
"@\[u\](.*?)\[/u\]@is",
"@\[url=$httpsregex\](.*?)\[/url\]@i",
"@\[url\]$httpsregex\[/url\]@i",
"@\[link=$urlregex\](.*?)\[/link\]@i",
"@\[link\]$urlregex\[/link\]@i",
"@\[url=$urlregex\](.*?)\[/url\]@i",
"@\[url\]$urlregex\[/url\]@i",
"@\[quote=(.*?)\](.*?)\[/quote\]@is",
"@\[quote\](.*?)\[/quote\]@is",
"@\[list\](.*?)\[/list\]@is",
"@\[list=1\](.*?)\[/list\]@is",
"@\[pre\](.*?)\[/pre\]@is",
"@\[img\]$urlregex\[/img\]@is",
"@\[color=(?:\"?)(.{3,8})(?:\"?)\](.*?)\[/color\]@is",
"@((?:|
|))@is",
"@\[size=([1-9]|[0-2][0-9])\](.*?)\[/size\]@is",
"@\[code\](.*?)\[/code\]@is",
"@\[mailto\](.*?)\[/mailto\]@is",
"@\[email\](.*?)\[/email\]@is",
"@\[trac\](?:\#|ticket:)(\d+)\[/trac\]@is",
"@\[trac\]wiki:(.*?)\[/trac\]@is",
"@\[trac\]changeset:(\d+)\[/trac\]@is"
//Note: The above list array member ensures we're within a list
//when doing list item transformations.
//TODO: Make sure we're not between two lists
);
// What the above tags are turned in to
$htmltags = array (
"\\1",
"\\1",
"\\1",
"\\2",
"https://\\1",
"\\3",
"http://\\2",
"\\3",
"http://\\2",
"\\1 wrote:
\\2
",
"\\1
",
"",
"
\\1
",
"
\\1
",
"![](\"http://\\2\")
",
"\\2",
"\\1\\2\n\\3",
"\\2",
"\\1
",
"\\1",
"\\1",
"#\\1",
"\\1",
"[\\1]"
);
// Do the actual replacing - iterations for nested items
$lasttext = "";
$i = 0;
// $i<20 to prevent DoS
while ($text != $lasttext && $i<20) {
$lasttext = $text;
$text = preg_replace($bbtags,$htmltags,$text);
$i = $i + 1;
}
return $text;
}
// Make links open in new windows.
function externalize_links($text) {
// TODO: Convert this to PCRE
$i=0;$linkpos=true;
while (true){ //Find a link
$linkpos=strpos($text,"]?', 'strong', 'ul', 'li', 'pre', 'blockquote', 'u');
// Note on $tags - no br or img, as they have no closing tags - can we define this above?
// Maybe define two arrays, those with closing tags and those without, and combine the
// two of them for the standard HTML sanitizing function?
// Don't do anything if the string is too short
if (strlen($str) < 3) {
return $str;
} else {
// Loop over $str and count the opening and closing for each tag in $tags
foreach ($tags as $tag) {
$m = array();
$o = preg_match_all("/<(".$tag.")>/", $str, $m);
$c = substr_count($str, "");
$open[$tag] = ($o < $c) ? $c - $o : 0;
$close[$tag] = ($c < $o) ? $o - $c : 0;
// Debuggin'
//echo "Tag: {$tag}\nOpen: {$o}\nClose: {$c}\nOT: {$open[$tag]}\nCT: {$close[$tag]}
";
}
// Prepend the return string with an opening tag as needed
/* $pre = ''; ...uhh... doesn't work right
foreach ($open as $tag => $cnt) {
$pre .= ($cnt > 0) ? "<{$tag}>" : '';
} */
// Append the return string with a closing tag as needed
$post = '';
foreach ($close as $tag => $cnt) {
$post .= ($cnt > 0) ? "" : '';
}
return /*$pre.*/$str.$post;
}
}
// Highlight terms in text (most likely used with searches)
function highlight_terms($text, $terms) {
$search = $terms;
$replace = array();
foreach ($search as $key => $value) {
$replace[$key] = "".$value."";
}
if (substr(phpversion(), 0, 1) > 4) { // PHP 4.x doesn't support str_ireplace
return str_ireplace($search, $replace, $text);
} else {
return str_replace($search, $replace, $text);
}
}
$cvs_version_tracker[]="\$Id$"; //Generated automatically - do not edit
?>