commit a334772967de25764ed7b11d768e8b977818d0c6
author Bram Moolenaar <Bram@vim.org> Sat May 11 21:14:24 2019 +0200
committer Bram Moolenaar <Bram@vim.org> Sat May 11 21:14:24 2019 +0200
tree 1f5b7b787eb7b18e2adb6aee66843837d64cdb99
parent 6d2399bd1053b367e13cc2b8991d3ff0bf724c7c

patch 8.1.1321: no docs or tests for listener functions

Problem:    No docs or tests for listener functions.
Solution:   Add help and tests for listener_add() and listener_remove().
            Invoke the callbacks before redrawing.

src/screen.c

diff --git a/src/screen.c b/src/screen.c
index 3ebc244..5cdbd2c 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -564,6 +564,11 @@
 	type = 0;
     }
 
+#ifdef FEAT_EVAL
+    // Before updating the screen, notify any listeners of changed text.
+    invoke_listeners();
+#endif
+
     if (must_redraw)
     {
 	if (type < must_redraw)	    /* use maximal type */