mirror of
https://github.com/invoiceninja/invoiceninja.git
synced 2024-11-10 13:12:50 +01:00
318 lines
9.3 KiB
PHP
318 lines
9.3 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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$GLOBALS['autolink_options'] = [
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// Should http:// be visibly stripped from the front
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// of URLs?
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'strip_protocols' => false,
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];
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//###################################################################
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function autolink($text, $limit = 30, $tagfill = '', $auto_title = true)
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{
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$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, $force_prefix = null)
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{
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$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 (['()', '[]', '{}'] 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) {
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$link_url = $force_prefix.$link_url;
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}
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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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{
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if (! $limit) {
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return $text;
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}
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if (strlen($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, $tagfill = '')
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{
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$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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