Fix "washing" of style elements wrapped into many lines

CHANGELOG

@@ -37,6 +37,7 @@ CHANGELOG Roundcube Webmail
 - Fix error when using back button after sending an email (#1490009)
 - Fix removing signature when switching to identity with an empty sig in HTML mode (#1490470)
 - Disable links list generation on html-to-text conversion of identities or composed message (#1490437)
+- Fix "washing" of style elements wrapped into many lines
 
 RELEASE 1.1.2
 -------------

program/lib/Roundcube/rcube_washtml.php

@@ -174,6 +174,9 @@ class rcube_washtml
     {
         $result = array();
 
+        // Remove unwanted white-space characters so regular expressions below work better
+        $style = preg_replace('/[\n\r\s\t]+/', ' ', $style);
+
         foreach (explode(';', $style) as $declaration) {
             if (preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) {
                 $cssid = $match[1];

tests/Framework/Washtml.php

@@ -182,6 +182,14 @@ class Framework_Washtml extends PHPUnit_Framework_TestCase
 
         $this->assertRegExp('|line-height: 1;|', $washed, "Untouched line-height (#1489917)");
         $this->assertRegExp('|; height: 10px|', $washed, "Fixed height units");
+
+        $html     = "<div style=\"padding: 0px\n   20px;border:1px solid #000;\"></div>";
+        $expected = "<div style=\"padding: 0px 20px; border: 1px solid #000\"></div>";
+
+        $washer = new rcube_washtml;
+        $washed = $washer->wash($html);
+
+        $this->assertTrue(strpos($washed, $expected) !== false, "White-space and new-line characters handling");
     }
 
     /**