public static function validate_regex($regex, $element)
{
if (is_string($regex) && @get_class($element) == CRAYON_ELEMENT_CLASS) {
// If the (?alt) tag has been used, insert the file into the regex
$file = self::regex_match('#\\(\\?alt:(.+?)\\)#', $regex);
if (count($file) == 2) {
// Element 0 has full match, 1 has captured groups
for ($i = 0; $i < count($file[1]); $i++) {
$file_lines = CrayonUtil::lines(dirname($element->path()) . crayon_s() . $file[1][$i], 'rcwh');
if ($file_lines !== FALSE) {
$file_lines = implode('|', $file_lines);
// If any spaces exist, treat them as whitespace
$file_lines = preg_replace('#[ \\t]+#msi', '\\s+', $file_lines);
$regex = str_replace($file[0][$i], "(?:{$file_lines})", $regex);
} else {
CrayonLog::syslog("Parsing of '{$element->path()}' failed, an (?alt) tag failed for the element '{$element->name()}'");
return FALSE;
}
}
}
// If the (?default:element) function is used, replace the regex with the default, if exists
$def = self::regex_match('#\\(\\?default(?:\\:(\\w+))?\\)#', $regex);
if (count($def) == 2) {
// Load default language
$default = CrayonResources::langs()->get(CrayonLangs::DEFAULT_LANG);
// If default has not been loaded, we can't use it, skip the element
if (!$default) {
CrayonLog::syslog("Could not use default regex in the element '{$element->name()}' in '{$element->path()}'");
return FALSE;
}
for ($i = 0; $i < count($def[1]); $i++) {
// If an element has been provided
$element_name = !empty($def[1][$i]) ? $def[1][$i] : $element->name();
if (($default_element = $default->element($element_name)) != FALSE) {
$regex = str_replace($def[0][$i], '(?:' . $default_element->regex() . ')', $regex);
} else {
CrayonLog::syslog("The language at '{$element->path()}' referred to the Default Language regex for element '{$element->name()}', which did not exist.");
return FALSE;
}
}
}
// If the (?html) tag is used, escape characters in html (<, > and &)
$html = self::regex_match('#\\(\\?html:(.+?)\\)#', $regex);
if (count($html) == 2) {
for ($i = 0; $i < count($html[1]); $i++) {
$regex = str_replace($html[0][$i], htmlentities($html[1][$i]), $regex);
}
}
// Ensure all parenthesis are atomic to avoid conflicting with element matches
$regex = CrayonUtil::esc_atomic($regex);
// Escape #, this is our delimiter
$regex = CrayonUtil::esc_hash($regex);
// Test if regex is valid
if (@preg_match("#{$regex}#", '') === FALSE) {
CrayonLog::syslog("The regex for the element '{$element->name()}' in '{$element->path()}' is not valid.");
return FALSE;
}
return $regex;
} else {
return '';
}
}
private static function init_tags_regex($force = FALSE, $flags = NULL, &$tags_regex = NULL)
{
CrayonSettingsWP::load_settings();
self::init_tag_bits();
// Default output
if ($tags_regex === NULL) {
$tags_regex =& self::$tags_regex;
}
if ($force || $tags_regex === "") {
// Check which tags are in $flags. If it's NULL, then all flags are true.
$in_flag = self::in_flag($flags);
if ($in_flag[CrayonSettings::CAPTURE_MINI_TAG] && CrayonGlobalSettings::val(CrayonSettings::CAPTURE_MINI_TAG) || $force || ($in_flag[CrayonSettings::INLINE_TAG] && (CrayonGlobalSettings::val(CrayonSettings::INLINE_TAG) && CrayonGlobalSettings::val(CrayonSettings::INLINE_TAG_CAPTURE)) || $force)) {
$aliases = CrayonResources::langs()->ids_and_aliases();
self::$alias_regex = '';
for ($i = 0; $i < count($aliases); $i++) {
$alias = $aliases[$i];
$alias_regex = CrayonUtil::esc_hash(CrayonUtil::esc_regex($alias));
if ($i != count($aliases) - 1) {
$alias_regex .= '|';
}
self::$alias_regex .= $alias_regex;
}
}
// Add other tags
$tags_regex = '#(?<!\\$)(?:(\\s*\\[\\s*crayon\\b)';
// TODO this is duplicated in capture_crayons()
$tag_regexes = array(CrayonSettings::CAPTURE_MINI_TAG => '(\\[\\s*(' . self::$alias_regex . ')\\b)', CrayonSettings::CAPTURE_PRE => '(<\\s*pre\\b)', CrayonSettings::INLINE_TAG => '(' . self::REGEX_INLINE_CLASS . ')' . '|(\\{\\s*(' . self::$alias_regex . ')\\b([^\\}]*)\\})', CrayonSettings::PLAIN_TAG => '(\\s*\\[\\s*plain\\b)', CrayonSettings::BACKQUOTE => '(`[^`]*`)');
foreach ($tag_regexes as $tag => $regex) {
if ($in_flag[$tag] && (CrayonGlobalSettings::val($tag) || $force)) {
$tags_regex .= '|' . $regex;
}
}
$tags_regex .= ')#msi';
}
}
private static function init_tags_regex()
{
if (!self::$is_tags_regex_init) {
if (CrayonGlobalSettings::val(CrayonSettings::CAPTURE_MINI_TAG) || CrayonGlobalSettings::val(CrayonSettings::INLINE_TAG)) {
$aliases = CrayonResources::langs()->ids_and_aliases();
for ($i = 0; $i < count($aliases); $i++) {
$alias = $aliases[$i];
$alias_regex = CrayonUtil::esc_hash(CrayonUtil::esc_regex($alias));
if ($i != count($aliases) - 1) {
$alias_regex .= '|';
}
self::$alias_regex .= $alias_regex;
}
}
// Add other tags
self::$tags_regex = '#(\\s*\\[\\s*crayon\\b)';
if (CrayonGlobalSettings::val(CrayonSettings::CAPTURE_MINI_TAG)) {
self::$tags_regex .= '|([\\[]\\s*(' . self::$alias_regex . '))';
}
if (CrayonGlobalSettings::val(CrayonSettings::CAPTURE_PRE)) {
self::$tags_regex .= '|(<\\s*pre\\b)';
}
if (CrayonGlobalSettings::val(CrayonSettings::INLINE_TAG)) {
self::$tags_regex .= '|(' . self::REGEX_INLINE_CLASS . ')' . '|([\\{]\\s*(' . self::$alias_regex . '))';
}
if (CrayonGlobalSettings::val(CrayonSettings::PLAIN_TAG)) {
self::$tags_regex .= '|(\\s*\\[\\s*plain\\b)';
}
if (CrayonGlobalSettings::val(CrayonSettings::BACKQUOTE)) {
self::$tags_regex .= '|(`[^`]*`)';
}
self::$tags_regex .= '#msi';
self::$is_tags_regex_init = TRUE;
}
}
