From b7eba15917322afe47bf76bf9f74469122bc0a37 Mon Sep 17 00:00:00 2001
From: Simounet <contact@simounet.net>
Date: Tue, 10 Jul 2018 18:33:58 +0200
Subject: [PATCH] Fix srcset handling

Regexp added because a comma is a valid URL character.
---
 htmLawed.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/htmLawed.php b/htmLawed.php
index 550bc11..4fdce0f 100755
--- a/htmLawed.php
+++ b/htmLawed.php
@@ -519,7 +519,10 @@ function hl_tag($t){
    $v = str_replace("­", ' ', (strpos($v, '&') !== false ? str_replace(array('&#xad;', '&#173;', '&shy;'), ' ', $v) : $v)); # double-quoted char: soft-hyphen; appears here as "­" or hyphen or something else depending on viewing software
    if($k == 'srcset'){
     $v2 = '';
-    foreach(explode(',', $v) as $k1=>$v1){
+    $pattern = "/(?:[^\"'\s]+\s*(?:\d+[wx])+)/";
+    preg_match_all($pattern, $v, $matches);
+    $matches = call_user_func_array('array_merge', $matches);
+    foreach($matches as $k1=>$v1){
      $v1 = explode(' ', ltrim($v1), 2);
      $k1 = isset($v1[1]) ? trim($v1[1]) : '';
      $v1 = trim($v1[0]);