From ced34cb15e095836767971aa4d27b141fb1d7ec9 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Sat, 18 Oct 2014 08:47:54 -0400
Subject: [PATCH] Merge pull request #230 from bytesatwork-xx/master

---
 program/lib/Roundcube/rcube_message.php |   22 +++++++++++++++-------
 1 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/program/lib/Roundcube/rcube_message.php b/program/lib/Roundcube/rcube_message.php
index 0cc0766..a648ae7 100644
--- a/program/lib/Roundcube/rcube_message.php
+++ b/program/lib/Roundcube/rcube_message.php
@@ -74,6 +74,11 @@
      */
     function __construct($uid, $folder = null)
     {
+        // decode combined UID-folder identifier
+        if (preg_match('/^\d+-.+/', $uid)) {
+            list($uid, $folder) = explode('-', $uid, 2);
+        }
+
         $this->uid  = $uid;
         $this->app  = rcube::get_instance();
         $this->storage = $this->app->get_storage();
@@ -195,8 +200,6 @@
     /**
      * Determine if the message contains a HTML part. This must to be
      * a real part not an attachment (or its part)
-     * This must to be
-     * a real part not an attachment (or its part)
      *
      * @param bool $enriched Enables checking for text/enriched parts too
      *
@@ -213,15 +216,19 @@
                 }
 
                 $level = explode('.', $part->mime_id);
+                $depth = count($level);
 
-                // Check if the part belongs to higher-level's alternative/related
+                // Check if the part belongs to higher-level's multipart part
+                // this can be alternative/related/signed/encrypted or mixed
                 while (array_pop($level) !== null) {
-                    if (!count($level)) {
+                    $parent_depth = count($level);
+                    if (!$parent_depth) {
                         return true;
                     }
 
                     $parent = $this->mime_parts[join('.', $level)];
-                    if ($parent->mimetype != 'multipart/alternative' && $parent->mimetype != 'multipart/related') {
+                    if (!preg_match('/^multipart\/(alternative|related|signed|encrypted|mixed)$/', $parent->mimetype)
+                        || ($parent->mimetype == 'multipart/mixed' && $parent_depth < $depth - 1)) {
                         continue 2;
                     }
                 }
@@ -530,8 +537,9 @@
                     $part_mimetype = $mail_part->real_mimetype;
                     list($primary_type, $secondary_type) = explode('/', $part_mimetype);
                 }
-                else
-                    $part_mimetype = $mail_part->mimetype;
+                else {
+                    $part_mimetype = $part_orig_mimetype = $mail_part->mimetype;
+                  }
 
                 // multipart/alternative
                 if ($primary_type == 'multipart') {

--
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