ZP-1240 Add parameter $htmlsafe (default false) to

Utils::Utf8_truncate().

Released under the Affero GNU General Public License (AGPL) version 3.

src/lib/utils/utils.php

@@ -380,11 +380,13 @@ class Utils {
      *
      * If it's not possible to truncate properly, an empty string is returned
      *
-     * @param string $string - the string
-     * @param string $length - position where string should be cut
+     * @param string    $string     the string
+     * @param string    $length     position where string should be cut
+     * @param boolean   $htmlsafe   doesn't cut html tags in half, doesn't ensure correct html - default: false
+     *
      * @return string truncated string
      */
-    static public function Utf8_truncate($string, $length) {
+    static public function Utf8_truncate($string, $length, $htmlsafe = false) {
         // make sure length is always an interger
         $length = (int)$length;
 
@@ -393,6 +395,16 @@ class Utils {
             $length = strlen($string) - 1;
         }
 
+        // The intent is not to cut HTML tags in half which causes displaying issues (see ZP-1240).
+        // The used method just tries to cut outside of tags, without checking tag validity and closing tags.
+        if ($htmlsafe) {
+            $offset = 0 - strlen($string) + $length;
+            $validPos = strrpos($string, "<", $offset);
+            if ($validPos > strrpos($string, ">", $offset)) {
+                $length = $validPos;
+            }
+        }
+
         while($length >= 0) {
             if ((ord($string[$length]) < 0x80) || (ord($string[$length]) >= 0xC0)) {
                 return substr($string, 0, $length);