- Add possibility to force mailbox selection. There're situations where we're invoking

STATUS (for all messages count) and SELECT later for other operations. If we
  call SELECT first, the STATUS will be not needed.

program/include/rcube_imap.php

@@ -113,7 +113,7 @@ class rcube_imap
         $this->conn = new rcube_imap_generic();
     }
 
-    
+
     /**
      * Connect to an IMAP server
      *
@@ -182,7 +182,7 @@ class rcube_imap
         return false;
     }
 
-    
+
     /**
      * Close IMAP connection
      * Usually done on script shutdown
@@ -195,7 +195,7 @@ class rcube_imap
         $this->write_cache();
     }
 
-    
+
     /**
      * Close IMAP connection and re-connect
      * This is used to avoid some strange socket errors when talking to Courier IMAP
@@ -233,7 +233,7 @@ class rcube_imap
     {
         return ($this->conn) ? $this->conn->error : '';
     }
-    
+
 
     /**
      * Set options to be used in rcube_imap_generic::connect()
@@ -245,7 +245,7 @@ class rcube_imap
         $this->options = array_merge($this->options, (array)$opt);
     }
 
-    
+
     /**
      * Set a root folder for the IMAP connection.
      *
@@ -267,7 +267,7 @@ class rcube_imap
             $this->get_hierarchy_delimiter();
     }
 
-    
+
     /**
      * Set default message charset
      *
@@ -281,7 +281,7 @@ class rcube_imap
         $this->default_charset = $cs;
     }
 
-    
+
     /**
      * This list of folders will be listed above all other folders
      *
@@ -299,7 +299,7 @@ class rcube_imap
         }
     }
 
-    
+
     /**
      * Set internal mailbox reference.
      *
@@ -321,7 +321,27 @@ class rcube_imap
         $this->_clear_messagecount($mailbox);
     }
 
-    
+
+    /**
+     * Forces selection of a mailbox
+     *
+     * @param  string $mailbox Mailbox/Folder name
+     * @access public
+     */
+    function select_mailbox($mailbox)
+    {
+        $mailbox = $this->mod_mailbox($mailbox);
+
+        $selected = $this->conn->select($mailbox);
+
+        if ($selected && $this->mailbox != $mailbox) {
+            // clear messagecount cache for this mailbox
+            $this->_clear_messagecount($mailbox);
+            $this->mailbox = $mailbox;
+        }
+    }
+
+
     /**
      * Set internal list page
      *
@@ -333,7 +353,7 @@ class rcube_imap
         $this->list_page = (int)$page;
     }
 
-    
+
     /**
      * Set internal page size
      *
@@ -345,7 +365,7 @@ class rcube_imap
         $this->page_size = (int)$size;
     }
 
-    
+
     /**
      * Save a set of message ids for future message listing methods
      *
@@ -372,7 +392,7 @@ class rcube_imap
         $this->search_sorted     = $sorted;
     }
 
-    
+
     /**
      * Return the saved search set as hash array
      * @return array Search set
@@ -388,7 +408,7 @@ class rcube_imap
 	    );
     }
 
-    
+
     /**
      * Returns the currently used mailbox name
      *
@@ -400,7 +420,7 @@ class rcube_imap
         return $this->conn->connected() ? $this->mod_mailbox($this->mailbox, 'out') : '';
     }
 
-    
+
     /**
      * Returns the IMAP server's capability
      *
@@ -413,7 +433,7 @@ class rcube_imap
         return $this->conn->getCapability(strtoupper($cap));
     }
 
-    
+
     /**
      * Sets threading flag to the best supported THREAD algorithm
      *
@@ -437,7 +457,7 @@ class rcube_imap
         return $this->threading;
     }
 
-    
+
     /**
      * Checks the PERMANENTFLAGS capability of the current mailbox
      * and returns true if the given flag is supported by the IMAP server
@@ -453,7 +473,7 @@ class rcube_imap
         return (in_array_nocase($imap_flag, $this->conn->data['PERMANENTFLAGS']));
     }
 
-    
+
     /**
      * Returns the delimiter that is used by the IMAP server for folder separation
      *
@@ -471,7 +491,7 @@ class rcube_imap
         return $this->delimiter;
     }
 
-    
+
     /**
      * Get message count for a specific mailbox
      *
@@ -489,7 +509,7 @@ class rcube_imap
         return $this->_messagecount($mailbox, $mode, $force, $status);
     }
 
-    
+
     /**
      * Private method for getting nr of messages
      *

program/steps/mail/pagenav.inc

@@ -20,7 +20,13 @@
 */
 
 $uid = get_input_value('_uid', RCUBE_INPUT_GET);
-$cnt  = $IMAP->messagecount(NULL, 'ALL'); // Only messages, no threads here
+
+// Select mailbox first, for better performance
+$mbox_name = $IMAP->get_mailbox_name();
+$IMAP->select_mailbox($mbox_name);
+
+// Get messages count (only messages, no threads here)
+$cnt  = $IMAP->messagecount(NULL, 'ALL');
 
 if ($_SESSION['sort_col'] == 'date' && $_SESSION['sort_order'] != 'DESC'
     && empty($_REQUEST['_search']) && !$CONFIG['skip_deleted'] && !$IMAP->threading