[hackers] [sxiv] Ignore button and key events while key-handler is running || Bert Münnich

[git]

commit 9a85dd41d8551f82a5d00c8e0dd0807e23bbdc6d
Author:     Bert Münnich <be...@posteo.de>
AuthorDate: Tue Nov 29 12:07:08 2016 +0100
Commit:     Bert Münnich <be...@posteo.de>
CommitDate: Wed Nov 30 20:48:32 2016 +0100

    Ignore button and key events while key-handler is running
    
    Related to issue #253, which originally asked for a non-blocking 
key-handler.

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) {