Set buffer when creating a MathData from parts of another one

This is triggered by selecting part of an equation under Xcb platform
(x11). Indeed, the current selection has to be sent to the X11 server
and BufferView::requestSelection() is called. Eventually
cap::grabSelection() is the function that creates this partial
MathData object.

Fixes ticket #12947.

diff --git a/src/mathed/MathData.cpp b/src/mathed/MathData.cpp
index 5f62d86846ab5247b70f3dac7b57dc8c331f9c0f..73c1d9db908bc9240dc08901dd60bbdff16f461f 100644 (file)
--- a/src/mathed/MathData.cpp
+++ b/src/mathed/MathData.cpp
@@ -49,7 +49,9 @@ namespace lyx {
 
 MathData::MathData(Buffer * buf, const_iterator from, const_iterator to)
        : base_type(from, to), buffer_(buf)
-{}
+{
+       setContentsBuffer();
+}
 
 
 void MathData::setContentsBuffer()