From 4b2c4ab109a770c9b424b24a66459fb2295e8771 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Mon, 26 Mar 2018 21:38:28 -0400
Subject: [PATCH] wayland: Don't emit signals if nothing changed

We were emitting a preedit-changed even if the preedit text did
not actually change, causing text views to scroll.
---
 gtk/gtkimcontextwayland.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtk/gtkimcontextwayland.c b/gtk/gtkimcontextwayland.c
index af195581c8..5bb7ecd04d 100644
--- a/gtk/gtkimcontextwayland.c
+++ b/gtk/gtkimcontextwayland.c
@@ -84,6 +84,9 @@ static GtkIMContextWaylandGlobal *global = NULL;
 static void
 reset_preedit (GtkIMContextWayland *context)
 {
+  if (context->preedit.text == NULL)
+    return;
+
   g_clear_pointer (&context->preedit.text, g_free);
   context->preedit.cursor_idx = 0;
   g_signal_emit_by_name (context, "preedit-changed");
-- 
2.30.2