Queue: add "reorder" parameter to SetPriority()

src/queue/Queue.cxx

@@ -402,7 +402,8 @@ Queue::CountSamePriority(unsigned start_order, uint8_t priority) const
 }
 
 bool
-Queue::SetPriority(unsigned position, uint8_t priority, int after_order)
+Queue::SetPriority(unsigned position, uint8_t priority, int after_order,
+		   bool reorder)
 {
 	assert(position < length);
 
@@ -414,7 +415,7 @@ Queue::SetPriority(unsigned position, uint8_t priority, int after_order)
 	item->version = version;
 	item->priority = priority;
 
-	if (!random)
+	if (!random || !reorder)
 		/* don't reorder if not in random mode */
 		return true;
 

src/queue/Queue.hxx

@@ -340,10 +340,13 @@ struct Queue {
 	/**
 	 * Shuffles a (position) range in the queue.  The songs are physically
 	 * shuffled, not by using the "order" mapping.
+	 *
+	 * @param reorder false to suppress updating the order list
 	 */
 	void ShuffleRange(unsigned start, unsigned end);
 
-	bool SetPriority(unsigned position, uint8_t priority, int after_order);
+	bool SetPriority(unsigned position, uint8_t priority, int after_order,
+			 bool reorder=true);
 
 	bool SetPriorityRange(unsigned start_position, unsigned end_position,
 			      uint8_t priority, int after_order);