From 9a85dd41d8551f82a5d00c8e0dd0807e23bbdc6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bert=20M=C3=BCnnich?= <ber.t@posteo.de>
Date: Tue, 29 Nov 2016 12:07:08 +0100
Subject: [PATCH] Ignore button and key events while key-handler is running

Related to issue #253, which originally asked for a non-blocking key-handler.
---
 Makefile | 2 +-
 main.c   | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 07fff5e..3db5ade 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-VERSION   := git-20161128
+VERSION   := git-20161129
 
 PREFIX    := /usr/local
 MANPREFIX := $(PREFIX)/share/man
diff --git a/main.c b/main.c
index d1813a5..131fdec 100644
--- a/main.c
+++ b/main.c
@@ -458,6 +458,11 @@ void clear_resize(void)
 	resized = false;
 }
 
+Bool is_input_ev(Display *dpy, XEvent *ev, XPointer arg)
+{
+	return ev->type == ButtonPress || ev->type == KeyPress;
+}
+
 void run_key_handler(const char *key, unsigned int mask)
 {
 	pid_t pid;
@@ -468,6 +473,7 @@ void run_key_handler(const char *key, unsigned int mask)
 	int fcnt = marked ? markcnt : 1;
 	char kstr[32];
 	struct stat *oldst, st;
+	XEvent dump;
 
 	if (keyhandler.f.err != 0) {
 		if (!keyhandler.warned) {
@@ -538,6 +544,9 @@ void run_key_handler(const char *key, unsigned int mask)
 			f++;
 		}
 	}
+	/* drop user input events that occured while running the key handler */
+	while (XCheckIfEvent(win.env.dpy, &dump, is_input_ev, NULL));
+
 end:
 	if (mode == MODE_IMAGE) {
 		if (changed) {