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Fix display issues with RTL control characters in post names, subjects, and filenames.

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This commit is contained in:
Macil Tech 2013-04-02 17:28:04 +08:00
parent fd33e9eba1
commit a92bb182d9
4 changed files with 45 additions and 11 deletions
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33
inc/display.php
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@ -213,6 +213,39 @@ function truncate($body, $url, $max_lines = false, $max_chars = false) {
return $body;
}
function bidi_cleanup($str){
# Closes all embedded RTL and LTR unicode formatting blocks in a string so that
# it can be used inside another without controlling its direction.
# More info: http://www.iamcal.com/understanding-bidirectional-text/
#
# LRE - U+202A - 0xE2 0x80 0xAA
# RLE - U+202B - 0xE2 0x80 0xAB
# LRO - U+202D - 0xE2 0x80 0xAD
# RLO - U+202E - 0xE2 0x80 0xAE
#
# PDF - U+202C - 0xE2 0x80 0xAC
#
$explicits = '\xE2\x80\xAA|\xE2\x80\xAB|\xE2\x80\xAD|\xE2\x80\xAE';
$pdf = '\xE2\x80\xAC';
$stack = 0;
$str = preg_replace_callback("!(?<explicits>$explicits)|(?<pdf>$pdf)!", function($match) use (&$stack) {
if (isset($match['explicits']) && $match['explicits']) {
$stack++;
} else {
if ($stack)
$stack--;
else
return '';
}
return $match[0];
}, $str);
for ($i=0; $i<$stack; $i++){
$str .= "\xE2\x80\xAC";
}
return $str;
}
function secure_link_confirm($text, $title, $confirm_message, $href) {
global $config;