From: Po Lu <luangruo@yahoo.com>
Date: Fri, 31 Dec 2021 06:04:40 +0000 (+0800)
Subject: Don't select for gesture events on xwidgets if the server is too old
X-Git-Tag: emacs-29.0.90~3335
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=080a529f7e9c1a750f39d92f1e8f1e7170d6fb81;p=emacs.git

Don't select for gesture events on xwidgets if the server is too old

* src/xwidget.c (x_draw_xwidget_glyph_string): Only select for
XI gesture events if the server supports XI 2.4 or later.
---

diff --git a/src/xwidget.c b/src/xwidget.c
index 4f14152833e..36f216d9399 100644
--- a/src/xwidget.c
+++ b/src/xwidget.c
@@ -2247,9 +2247,12 @@ x_draw_xwidget_glyph_string (struct glyph_string *s)
 	  XISetMask (m, XI_Enter);
 	  XISetMask (m, XI_Leave);
 #ifdef XI_GesturePinchBegin
-	  XISetMask (m, XI_GesturePinchBegin);
-	  XISetMask (m, XI_GesturePinchUpdate);
-	  XISetMask (m, XI_GesturePinchEnd);
+	  if (FRAME_DISPLAY_INFO (s->f)->xi2_version >= 4)
+	    {
+	      XISetMask (m, XI_GesturePinchBegin);
+	      XISetMask (m, XI_GesturePinchUpdate);
+	      XISetMask (m, XI_GesturePinchEnd);
+	    }
 #endif
 	  XISelectEvents (xv->dpy, xv->wdesc, &mask, 1);
 	}