(redisplay_window): If we set PT, and that alters a region

being displayed, call try_window again.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index b78da7692ad..1eddfd23c39 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -1148,7 +1148,6 @@ redisplay_window (window, just_this_one)
       try_window (window, startp);
       if (cursor_vpos < 0)
         {
-          /* ??? What should happen here if highlighting a region?  */
           /* If point does not appear, move point so it does appear */
           pos = *compute_motion (startp, 0,
                                 ((EQ (window, minibuf_window) && startp == 1)
@@ -1168,6 +1167,12 @@ redisplay_window (window, just_this_one)
               FRAME_CURSOR_X (f) = max (0, pos.hpos) + XFASTINT (w->left);
               FRAME_CURSOR_Y (f) = pos.vpos + XFASTINT (w->top);
             }
+          /* If we are highlighting the region,
+             then we just changed the region, so redisplay to show it.  */
+          cancel_my_columns (XWINDOW (window));
+          if (!NILP (Vtransient_mark_mode)
+              && !NILP (current_buffer->mark_active))
+            try_window (window, startp);
         }
       goto done;
     }