Skip all drawing with NoScreenUpdate strategy

It seems that it was needed in 0b0c27ef, but nowadays the metrics are
not touched when we set this strategy.

diff --git a/src/BufferView.cpp b/src/BufferView.cpp
index f02cb6668613fba7a97ca28763d0cbf8dfc5a472..cff66ba5aae08945b664147d20ddad4c15edbfc5 100644 (file)
--- a/src/BufferView.cpp
+++ b/src/BufferView.cpp
@@ -3079,12 +3079,8 @@ void BufferView::draw(frontend::Painter & pain)
        switch (d->update_strategy_) {
 
        case NoScreenUpdate:
-               // If no screen painting is actually needed, only some the different
-               // coordinates of insets and paragraphs needs to be updated.
                LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
-               pi.full_repaint = true;
-               pi.pain.setDrawingEnabled(false);
-               tm.draw(pi, 0, y);
+               // nothing to do
                break;
 
        case SingleParUpdate: