mirror of
https://github.com/invoiceninja/invoiceninja.git
synced 2025-10-31 09:57:33 -04:00
336 lines
6.7 KiB
PHP
336 lines
6.7 KiB
PHP
<?php
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#
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# A PHP auto-linking library
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#
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# https://github.com/iamcal/lib_autolink
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#
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# By Cal Henderson <cal@iamcal.com>
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# This code is licensed under the MIT license
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#
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####################################################################
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#
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# These are global options. You can set them before calling the autolinking
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# functions to change the output.
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#
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$GLOBALS['autolink_options'] = array(
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# Should http:// be visibly stripped from the front
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# of URLs?
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'strip_protocols' => false,
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);
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####################################################################
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function autolink($text, $limit=30, $tagfill='', $auto_title = true){
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$text = autolink_do($text, '![a-z][a-z-]+://!i', $limit, $tagfill, $auto_title);
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$text = autolink_do($text, '!(mailto|skype):!i', $limit, $tagfill, $auto_title);
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$text = autolink_do($text, '!www\\.!i', $limit, $tagfill, $auto_title, 'http://');
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return $text;
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}
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####################################################################
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function autolink_do($text, $sub, $limit, $tagfill, $auto_title, $force_prefix=null){
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$text_l = StrToLower($text);
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$cursor = 0;
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$loop = 1;
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$buffer = '';
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while (($cursor < strlen($text)) && $loop){
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$ok = 1;
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$matched = preg_match($sub, $text_l, $m, PREG_OFFSET_CAPTURE, $cursor);
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if (!$matched){
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$loop = 0;
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$ok = 0;
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}else{
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$pos = $m[0][1];
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$sub_len = strlen($m[0][0]);
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$pre_hit = substr($text, $cursor, $pos-$cursor);
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$hit = substr($text, $pos, $sub_len);
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$pre = substr($text, 0, $pos);
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$post = substr($text, $pos + $sub_len);
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$fail_text = $pre_hit.$hit;
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$fail_len = strlen($fail_text);
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#
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# substring found - first check to see if we're inside a link tag already...
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#
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$bits = preg_split("!</a>!i", $pre);
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$last_bit = array_pop($bits);
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if (preg_match("!<a\s!i", $last_bit)){
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#echo "fail 1 at $cursor<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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#
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# looks like a nice spot to autolink from - check the pre
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# to see if there was whitespace before this match
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#
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if ($ok){
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if ($pre){
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if (!preg_match('![\s\(\[\{>]$!s', $pre)){
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#echo "fail 2 at $cursor ($pre)<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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}
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#
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# we want to autolink here - find the extent of the url
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#
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if ($ok){
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if (preg_match('/^([a-z0-9\-\.\/\-_%~!?=,:;&+*#@\(\)\$]+)/i', $post, $matches)){
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$url = $hit.$matches[1];
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$cursor += strlen($url) + strlen($pre_hit);
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$buffer .= $pre_hit;
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$url = html_entity_decode($url);
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#
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# remove trailing punctuation from url
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#
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while (preg_match('|[.,!;:?]$|', $url)){
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$url = substr($url, 0, strlen($url)-1);
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$cursor--;
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}
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foreach (array('()', '[]', '{}') as $pair){
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$o = substr($pair, 0, 1);
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$c = substr($pair, 1, 1);
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if (preg_match("!^(\\$c|^)[^\\$o]+\\$c$!", $url)){
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$url = substr($url, 0, strlen($url)-1);
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$cursor--;
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}
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}
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#
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# nice-i-fy url here
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#
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$link_url = $url;
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$display_url = $url;
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if ($force_prefix) $link_url = $force_prefix.$link_url;
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if ($GLOBALS['autolink_options']['strip_protocols']){
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if (preg_match('!^(http|https)://!i', $display_url, $m)){
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$display_url = substr($display_url, strlen($m[1])+3);
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}
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}
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$display_url = autolink_label($display_url, $limit);
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#
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# add the url
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#
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$currentTagfill = $tagfill;
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if ($display_url != $link_url && !preg_match('@title=@msi',$currentTagfill) && $auto_title) {
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$display_quoted = preg_quote($display_url, '!');
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if (!preg_match("!^(http|https)://{$display_quoted}$!i", $link_url)){
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$currentTagfill .= ' title="'.$link_url.'"';
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}
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}
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$link_url_enc = HtmlSpecialChars($link_url);
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$display_url_enc = HtmlSpecialChars($display_url);
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$buffer .= "<a href=\"{$link_url_enc}\"$currentTagfill>{$display_url_enc}</a>";
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}else{
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#echo "fail 3 at $cursor<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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}
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#
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# add everything from the cursor to the end onto the buffer.
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#
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$buffer .= substr($text, $cursor);
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return $buffer;
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}
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####################################################################
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function autolink_label($text, $limit){
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if (!$limit){ return $text; }
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if (strlen($text) > $limit){
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return substr($text, 0, $limit-3).'...';
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}
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return $text;
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}
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####################################################################
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function autolink_email($text, $tagfill=''){
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$atom = '[^()<>@,;:\\\\".\\[\\]\\x00-\\x20\\x7f]+'; # from RFC822
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#die($atom);
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$text_l = StrToLower($text);
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$cursor = 0;
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$loop = 1;
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$buffer = '';
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while(($cursor < strlen($text)) && $loop){
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#
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# find an '@' symbol
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#
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$ok = 1;
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$pos = strpos($text_l, '@', $cursor);
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if ($pos === false){
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$loop = 0;
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$ok = 0;
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}else{
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$pre = substr($text, $cursor, $pos-$cursor);
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$hit = substr($text, $pos, 1);
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$post = substr($text, $pos + 1);
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$fail_text = $pre.$hit;
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$fail_len = strlen($fail_text);
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#die("$pre::$hit::$post::$fail_text");
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#
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# substring found - first check to see if we're inside a link tag already...
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#
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$bits = preg_split("!</a>!i", $pre);
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$last_bit = array_pop($bits);
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if (preg_match("!<a\s!i", $last_bit)){
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#echo "fail 1 at $cursor<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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#
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# check backwards
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#
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if ($ok){
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if (preg_match("!($atom(\.$atom)*)\$!", $pre, $matches)){
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# move matched part of address into $hit
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$len = strlen($matches[1]);
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$plen = strlen($pre);
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$hit = substr($pre, $plen-$len).$hit;
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$pre = substr($pre, 0, $plen-$len);
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}else{
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#echo "fail 2 at $cursor ($pre)<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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#
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# check forwards
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#
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if ($ok){
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if (preg_match("!^($atom(\.$atom)*)!", $post, $matches)){
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# move matched part of address into $hit
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$len = strlen($matches[1]);
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$hit .= substr($post, 0, $len);
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$post = substr($post, $len);
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}else{
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#echo "fail 3 at $cursor ($post)<br />\n";
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$ok = 0;
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$cursor += $fail_len;
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$buffer .= $fail_text;
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}
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}
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#
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# commit
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#
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if ($ok) {
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$cursor += strlen($pre) + strlen($hit);
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$buffer .= $pre;
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$buffer .= "<a href=\"mailto:$hit\"$tagfill>$hit</a>";
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}
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}
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#
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# add everything from the cursor to the end onto the buffer.
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#
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$buffer .= substr($text, $cursor);
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return $buffer;
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}
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####################################################################
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?>
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