Use MenuItem::status() instead of own submenudisabled function

[lyx.git] / src / bufferlist.C

diff --git a/src/bufferlist.C b/src/bufferlist.C
index 29fabe9d84753de981221b0a90ce7bc0ca59c88e..109d25f9e71e36790c79763d3d86ab53393cc79d 100644 (file)
--- a/src/bufferlist.C
+++ b/src/bufferlist.C
@@ -217,6 +217,35 @@ Buffer * BufferList::getBuffer(unsigned int choice)
 }
 
 
+Buffer * BufferList::next(Buffer const * buf) const 
+{
+       if (bstore.empty())
+               return 0;
+       BufferStorage::const_iterator it = find(bstore.begin(), 
+                                               bstore.end(), buf);
+       BOOST_ASSERT(it != bstore.end());
+       ++it;
+       if (it == bstore.end())
+               return bstore.front();
+       else
+               return *it;
+}
+
+
+Buffer * BufferList::previous(Buffer const * buf) const 
+{
+       if (bstore.empty())
+               return 0;
+       BufferStorage::const_iterator it = find(bstore.begin(), 
+                                               bstore.end(), buf);
+       BOOST_ASSERT(it != bstore.end());
+       if (it == bstore.begin())
+               return bstore.back();
+       else
+               return *(it - 1);
+}
+
+
 void BufferList::updateIncludedTeXfiles(string const & mastertmpdir,
                                        OutputParams const & runparams)
 {