From: Po Lu <luangruo@yahoo.com>
Date: Thu, 30 Dec 2021 03:18:42 +0000 (+0800)
Subject: Work around xwidgets releasing the passive grab on an entry event
X-Git-Tag: emacs-29.0.90~3355
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=a4893515c249386bca39f1b9a90adc6fc68b48d5;p=emacs.git

Work around xwidgets releasing the passive grab on an entry event

* src/xterm.c (handle_one_xevent): Don't send XI_Enter events to
xwidgets if button 1 is pressed.
---

diff --git a/src/xterm.c b/src/xterm.c
index 61dff7aaab6..afac07e7ff2 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -10011,8 +10011,14 @@ handle_one_xevent (struct x_display_info *dpyinfo,
 #ifdef HAVE_XWIDGETS
 	      if (xwidget_view)
 		{
-		  *finish = X_EVENT_DROP;
-		  xwidget_motion_or_crossing (xwidget_view, event);
+		  /* Don't send an enter event to the xwidget if the
+		     first button is pressed, to avoid it releasing
+		     the passive grab.  I don't know why that happens,
+		     but this workaround makes dragging to select text
+		     work again.  */
+		  if (!(enter->buttons.mask_len
+			&& XIMaskIsSet (enter->buttons.mask, 1)))
+		    xwidget_motion_or_crossing (xwidget_view, event);
 
 		  goto XI_OTHER;
 		}