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It9Ui#q]vAk9٢*2^Z P߉hL1xy ֮Vf*ʌb j'f po8(ummP=pp͕Bn ?)?T~DOsⴱ<=;L: } else if (preg_match("/^({$this->noword}*)(www\.)$/i", $matches[1], $m)) { $url = $m[2] . $matches[2]; $url_prefix = 'http://'; $prefix = $m[1]; } if (!empty($url)) { $suffix = $this->parse_url_brackets($url); $attrib = isset($this->options['link_attribs']) ? (array) $this->options['link_attribs'] : []; $attrib['href'] = $url_prefix . $url; $i = $this->add(html::a($attrib, rcube::Q($url)) . $suffix); $this->urls[$i] = $attrib['href']; } return $i >= 0 ? $prefix . $this->get_replacement($i) : $matches[0]; } /** * Callback to add an entry to the link index * * @param array $matches Matches result from preg_replace_callback with PREG_OFFSET_CAPTURE * * @return string Replacement string */ protected function linkref_addindex($matches) { $key = $matches[1][0]; if (!isset($this->linkrefs[$key])) { $this->linkrefs[$key] = []; } // Store the reference and its occurrence position $this->linkrefs[$key][] = [ $this->urls[$matches[3][0]] ?? null, $matches[0][1] ]; return $this->get_replacement($this->add('[' . $key . ']')) . $matches[2][0]; } /** * Callback to replace link references with real links * * @param array $matches Matches result from preg_replace_callback with PREG_OFFSET_CAPTURE * * @return string Replacement string */ protected function linkref_callback($matches) { $i = 0; $key = $matches[1][0]; if (!empty($this->linkrefs[$key])) { $attrib = isset($this->options['link_attribs']) ? (array) $this->options['link_attribs'] : []; foreach ($this->linkrefs[$key] as $linkref) { $attrib['href'] = $linkref[0]; if ($linkref[1] >= $matches[1][1]) { break; } } $i = $this->add(html::a($attrib, rcube::Q($matches[1][0]))); } return $i > 0 ? '[' . $this->get_replacement($i) . ']' : $matches[0][0]; } /** * Callback function used to build mailto: links around e-mail strings * * @param array $matches Matches result from preg_replace_callback * * @return string Replacement string */ protected function mailto_callback($matches) { $href = $matches[1]; $suffix = $this->parse_url_brackets($href); $i = $this->add(html::a('mailto:' . $href, rcube::Q($href)) . $suffix); return $i >= 0 ? $this->get_replacement($i) : ''; } /** * Look up the index from the preg_replace matches array * and return the substitution value. * * @param array $matches Matches result from preg_replace_callback * * @return string Value at index $matches[1] */ protected function replace_callback($matches) { return $this->values[$matches[1]] ?? null; } /** * Replace all defined (link|mailto) patterns with replacement string * * @param string $str Text * * @return string Text */ public function replace($str) { if (!is_string($str)) { return ''; } // search for patterns like links and e-mail addresses $str = preg_replace_callback($this->link_pattern, [$this, 'link_callback'], $str); $str = preg_replace_callback($this->mailto_pattern, [$this, 'mailto_callback'], $str); // resolve link references /* This code requires PHP 7.4 and could be used instead of the two if() statements below, when we get there. $str = preg_replace_callback($this->linkref_index, [$this, 'linkref_addindex'], $str, -1, $count, PREG_OFFSET_CAPTURE ); $str = preg_replace_callback($this->linkref_pattern, [$this, 'linkref_callback'], $str, -1, $count, PREG_OFFSET_CAPTURE ); */ if (preg_match_all($this->linkref_index, $str, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) { $diff = 0; foreach ($matches as $m) { $replace = $this->linkref_addindex($m); $str = substr_replace($str, $replace, $m[0][1] + $diff, strlen($m[0][0])); $diff += strlen($replace) - strlen($m[0][0]); } } if (preg_match_all($this->linkref_pattern, $str, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) { $diff = 0; foreach ($matches as $m) { $replace = $this->linkref_callback($m); $str = substr_replace($str, $replace, $m[0][1] + $diff, strlen($m[0][0])); $diff += strlen($replace) - strlen($m[0][0]); } } return $str; } /** * Replace substituted strings with original values * * @param string $str Text * * @return string Text */ public function resolve($str) { return preg_replace_callback($this->pattern, [$this, 'replace_callback'], $str); } /** * Fixes bracket characters in URL handling * * @param string &$url URL * * @return string Suffix (the rest of the URL input) */ protected static function parse_url_brackets(&$url) { // #1487672: special handling of square brackets, // URL regexp allows [] characters in URL, for example: // "http://example.com/?a[b]=c". However we need to handle // properly situation when a bracket is placed at the end // of the link e.g. "[http://example.com]" // Yes, this is not perfect handles correctly only paired characters // but it should work for common cases $suffix = ''; if (preg_match('/(\\[|\\])/', $url)) { $in = false; for ($i=0, $len=strlen($url); $i<$len; $i++) { if ($url[$i] == '[') { if ($in) { break; } $in = true; } else if ($url[$i] == ']') { if (!$in) { break; } $in = false; } } if ($i < $len) { $suffix = substr($url, $i); $url = substr($url, 0, $i); } } // Do the same for parentheses if (preg_match('/(\\(|\\))/', $url)) { $in = false; for ($i=0, $len=strlen($url); $i<$len; $i++) { if ($url[$i] == '(') { if ($in) { break; } $in = true; } else if ($url[$i] == ')') { if (!$in) { break; } $in = false; } } if ($i < $len) { $suffix = substr($url, $i); $url = substr($url, 0, $i); } } return $suffix; } }